How To Deal With Rounding Errors
Hey, Short version of my question: I believe I am having rounding errors because I am working with really, really small values. Would it help if I multiplied these values by a scalar (say, 1,000), did math with them, and then divided them by the scalar? I remember learning how IEEE floating point numbers are stored, but I can't remember enough about it to know if this would have any effect on precision. If not, what is a good way to get better precision? I am already using doubles instead of floats. Long explanation of my question: In my project, I have users clicking and dragging to adjust values. I would like to map values from the left-most of the view being zero, and the right-most of the view to be one. This is fairly simple. However, it feels a little unnatural if the value initially jumps to match where the mouse clicks before dragging. For example, if the initial value is 0.3, and they click in the middle of the view, the value jumps to 0.5. To take care of this I construct a polynomial which maps 0 to 0, the right-most of the view to 1, and the initial click location (middle) to the initial value (0.3). This works very well, and feels natural. However, when any of the values near the edges (the user clicks just off the left of the view), the values go crazy. I believe this is because of a rounding error. The same question still stands, would multiplying (and later dividing) everything by a scalar help me get greater precision? Thank You, Bridger Maxwell ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
any control over NSRunAlertPanel placing on screen
Hi, I want the alert panel to be placed in the middle of my main window. Is it possible? I gather that NSRunAlertPanelRelativeToWindow() is declared deprecated. Thanks, Nick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: any control over NSRunAlertPanel placing on screen
On 04/12/2008, at 6:17 PM, Nick Rogers wrote: I want the alert panel to be placed in the middle of my main window. Is it possible? I gather that NSRunAlertPanelRelativeToWindow() is declared deprecated. If you have a window-specific alert, you should use a sheet: http://developer.apple.com/documentation/Cocoa/Conceptual/Sheets/Tasks/UsingAlertSheets.html -- Rob Keniger ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: self = [super init];
Thank you, I suppose the reason I find it confusing is because self is a pointer to the current object. If self were to release self ( the current object ), while it is being used, I would have guessed that would cause problems. On Dec 4, 2008, at 12:39 AM, Nathan Day wrote: Usually self does not change, when the instance returned is different to the initially self then it is because the super init has decided that the initial self is not what it whats so it releases the initially self and returns a different object. This can happen for singltons or cluster object or perhaps in a suation where the object represents some resource and if there is already an object for that resource the new instance is released and a retained version of the original instance is returned in its place. On 04/12/2008, at 06:14 , EVS wrote: self = [super init]; Why does the above line of code not cause a memory leak or memory fault? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/nathan_day%40mac.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Live image preview, huge memory usage...
One last thing (I know, I'm annoying!..) I'm guessing its impossible to have this sweet workaround working in a thread right? Thing is, I have a lot of images to generate.. so I do it in a separate thread... your trick works well (borrowing an onscreen graphic context), but as soon as I do it in a thread, the leak re- appears... On 4-Dec-08, at 3:26 AM, Jean-Nicolas Jolivet wrote: Just wanted to say that I got it to work finally! :) basically I thought the last part of your code, where you render the CGImage in the current context was a necessary part of the trick, I realized that it wasn't hehe... No noticeable leaks now! Thanks a lot for this trick! On 3-Dec-08, at 8:27 PM, Rob Keniger wrote: On 03/12/2008, at 6:22 PM, Jean-Nicolas Jolivet wrote: Quick question (2 actually), right now Im drawing my CIImage in a custom view... would drawing the CIImage in my view's drawRect method achieve the same (leak-free) result as your piece of code??? i.e. something simple like: snip As far as I know, as long as you are drawing the CIImage to an on- screen context there will be no memory leak, so this should be fine if the view is in an on-screen window. Second question; my app does batch image processing so eventually I will have to draw those CIImage offscreen.. (only for the Color Control Filter actually)... I assume I have to live with the leak?? No, just use the code I posted which will prevent the leak from occurring when drawing offscreen, you just have to get an existing on-screen context to draw into. The drawing itself happens offscreen, you are just borrowing the on-screen context. You could get the context from anywhere as long as it's a valid on- screen context - in the example I posted I used the main window's context ([[NSApp mainWindow] graphicsContext]) but this is not the only way to do it. -- Rob Keniger ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/silvertab%40videotron.ca This email sent to [EMAIL PROTECTED] Jean-Nicolas Jolivet [EMAIL PROTECTED] http://www.silverscripting.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/silvertab%40videotron.ca This email sent to [EMAIL PROTECTED] Jean-Nicolas Jolivet [EMAIL PROTECTED] http://www.silverscripting.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: self = [super init];
On Thu, Dec 4, 2008 at 2:32 AM, EVS [EMAIL PROTECTED] wrote: Thank you, I suppose the reason I find it confusing is because self is a pointer to the current object. If self were to release self ( the current object ), while it is being used, I would have guessed that would cause problems. You can call [self release] as long as you don't access (directly or indirectly) self for the rest of the method. So if you keep from touching instance variables or calling methods off self then things will be fine. And if your caller knows somehow (like checking return values, in the case of init) to not reference the released self then everything is kosher. In fact, the same is true in C++ with this, only a little more pathologically so. You're allowed to call non-virtual member functions off a bad this pointer because those functions are statically bound. Causes confusion in every intro C++ course because students can't figure out why their program is crashing in the middle of a method call (when they finally access an instance variable off the bad this pointer). I even saw a horrible design pattern, probably on The Daily WTF, where the programmer was doing singletons via something like: ((MyClass*)NULL)-getInstance(); Totally pathological, but nothing technically wrong with it as long as you're careful. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Asynchronous timers (without a run loop)
I need to use timers in a low level library where I need to specify asynchronous callbacks to a timer function. I will not have any run loop so I cannot use NSTimer. Are there any low level timer API to use instead? I haven't found anything useful (yet) on google nor ADC. I assume there must exist some Mach or BSD level API:s that can be used? Any suggestions? / Påhl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSTypesetter problem
Hi, Okay so i have been debugging the problem for some time now and i find a weird thing happening. Usually, the proposed rect that is passed to the text container in the lineFragmentRectForProposedRect: method has either very large width or extends to the right edge of the text container. But i observed that some times i get a proposed like X=25; Y=18; Width=120; Height=14 even though i didn't return this as the remaining rect in the last call. I don't understand why it's X=25 instead of being 0. Also Some times i get a NSZeroRect as the proposed rect. Do you have any idea as in which cases the typesetter might call with such a proposed rect? Also considering the above mentioned rect, say my container width is 400, but there is a hole in the text container that will intersect the proposed rect say the square hole has X=55; and Width=50 In this case should i divide proposed rect as: rectToReturn : X=25; Y=18; Width=30; Height=14 rectRemained = X=105; Y=18; Width=15; Height=14 Or the rectRemained should extend till the right edge of the text container. I'd appreciate any help. Thanks, Chaitanya On 26-Nov-08, at 12:55 AM, Aki Inoue wrote: The recursive invocation of layout is being trigged because the info between layout manager and text view got out of sync. Does it still reproduce when you remove your overridden method ? Also, I wonder if the infinite recursion is related to the initial recursive layout invocation at all. Can you provide the bt of the final infinite recursion ? Aki On 2008/11/25, at 1:19, chaitanya pandit wrote: Actually i'm doing nothing special in setLineFragmentRect... i simply note the fragment and call super's setLineFragmentRect... What i observed is that the a new typesetter gets initialized only when i try to edit the text, and then it goes in to an infinite loop On 25-Nov-08, at 12:35 AM, Aki Inoue wrote: NSATSTypesetter trying to create a new instance is a normal behavior. When the typesetter detects it's being invoked to layout recursively, it instantiates a copy. The real culprit here is probably at #15 -[TTypesetter setLineFragmentRect:forGlyphRange:usedRect:baselineOffset:] that's triggering the recursive layout. Aki On 2008/11/23, at 22:45, chaitanya pandit wrote: In my application i have an NSTextView with custom NSTextContainer and also a custom NSTypesetter, i have a problem with displaying HTML stuff in the textView. I copied and pasted the entire contents of an html page ( it was news.google.com to be precise), it displays it fine, but whenever i try to edit the text contents, my app goes into an infinite loop. While debugging i observed a very weird thing, a new typesetter is getting initialized within the layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments method. Any idea about what might be going wrong? I'd appreciate any help. Here is the trace(note the #0): #0 0x00077a35 in -[TTypesetter init] at TTypesetter.m:25 #1 0x907691a9 in -[NSATSTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments :] #2 0x00077c08 in -[TTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments :] at TTypesetter.m:95 #3 0x90455f77 in -[NSLayoutManager(NSPrivate) _fillLayoutHoleForCharacterRange:desiredNumberOfLines:isSoft:] #4 0x905953b6 in _NSFastFillAllLayoutHolesForGlyphRange #5 0x9051e0ba in -[NSLayoutManager(NSPrivate) _firstPassGlyphRangeForBoundingRect:inTextContainer:okToFillHoles:] #6 0x9051cff1 in -[NSLayoutManager(NSPrivate) _glyphRangeForBoundingRect:inTextContainer:fast:okToFillHoles:] #7 0x9051ce27 in -[NSLayoutManager glyphRangeForBoundingRect:inTextContainer:] #8 0x9051c35e in -[NSTextView setNeedsDisplayInRect:avoidAdditionalLayout:] #9 0x9051be8b in -[NSTextView setNeedsDisplayInRect:] #10 0x903be662 in -[NSView setNeedsDisplay:] #11 0x9051cb82 in -[NSTextView textContainerOrigin] #12 0x90521b8f in -[NSLayoutManager(NSPrivate) _resizeTextViewForTextContainer:] #13 0x90406ed0 in -[NSLayoutManager(NSPrivate) _updateUsageForTextContainer:addingUsedRect:] #14 0x9045be46 in -[NSLayoutManager setLineFragmentRect:forGlyphRange:usedRect:] #15 0x00078688 in -[TTypesetter setLineFragmentRect:forGlyphRange:usedRect:baselineOffset:] at TTypesetter.m:325 #16 0x90420776 in -[NSATSTypesetter _layoutLineFragmentStartingWithGlyphAtIndex:characterIndex:atPoint:renderingContext :] #17 0x904583db in -[NSATSTypesetter layoutParagraphAtPoint:] #18 0x00077ba8 in -[TTypesetter layoutParagraphAtPoint:] at TTypesetter.m:86 #19 0x90400bcd in -[NSTypesetter _layoutGlyphsInLayoutManager:startingAtGlyphIndex:maxNumberOfLineFragments:maxCharacterIndex:nextGlyphIndex:nextCharacterIndex :] #20 0x909ed6f6 in -[NSTypesetter layoutCharactersInRange:forLayoutManager:maximumNumberOfLineFragments :] #21 0x90769238 in -[NSATSTypesetter
Re: Determining unreleased objects after Quit
Namaste! I never did figure it out *exactly*. Over time, as I made corrections/edits (mostly in the NIB), the problem simply ceased to exist. I think it was mashed bindings...as some had gotten toasted for whatever reason. Peace, Love, and Light, /s/ Jon C. Munson II Quoting Michael Ash [EMAIL PROTECTED]: On Wed, Dec 3, 2008 at 11:57 AM, Jon C. Munson II [EMAIL PROTECTED] wrote: Well, simply put, the application is still running. That is, after Quitting, the Stop button is enabled, and, if I try to run it again, I get a message to terminate the currently running version first... So the problem is not unreleased objects, it's that your app is still running. Hit the pause button in the debugger and figure out what it's doing. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Linking CFBundle with static libraries
On 4 Dec 2008, at 05:33, Nick Zitzmann wrote: On Dec 3, 2008, at 7:33 AM, frank wrote: The reason I have elected to use CFBundle is that I require the ability to load and unload plugins and as far as I have seen, this is not possible with NSBundle. See: It doesn't matter; CFBundle and NSBundle are two sides of a coin. They aren't toll-free bridged, however. And C and C++ bundles can be unloaded. In Tiger and earlier, Objective-C bundles couldn't be unloaded in any way whatsoever. I'm not sure if this was addressed in Leopard. ld: absolute addressing (perhaps -mdynamic-no-pic) used in ___tcf_0 from /Users/botmanx/Documents/src/trunk/Build/Debug/libboost- filesystem.a(error_code.o) not allowed in slidable image. Use '- read_only_relocs suppress' to enable text relocs On seeing this, I added the '-read_only_relocs suppress' CFlag to my build options as the compiler suggested but the error remains. Does anyone know how I might get around this problem? Are you sure the static library was built correctly? Libraries of any sort cannot contain position-independent code, and that linker error suggests that the static library was compiled with the - mdynamic-no-pic option. Do you have the source code for the static library? Nick Zitzmann http://www.chronosnet.com/ Hi Nick, the problem was with the way I was building my libraries; I was using the Generate Position-Dependent Code from the GCC 4.0 Code Generation options. Once I disabled this my bundle built without any problems. Thanks for your help! Best Regards, Frank ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Programmatically loading an NSImage via other field
In response to all the responses...
This monitoring needs to happen whether the user types in a field,
or, there is a choice made via NSOpenPanel, or the record is scrolled
(meaning moved next, moved previous).
So, using the beginning of the KVO below (which is the route I
suspected I'd have to go, but not sure exactly how), would I need to
add other delegate methods to handle the other cases?
Also, is dragging the delegate from the text field to the File's Owner
the same as the awake from NIB call, or do I need to add the
awakFromNIB as well?
Thanks!
Peace, Love, and Light,
/s/ Jon C. Munson II
Quoting Ken Tozier [EMAIL PROTECTED]:
Something like this should get you in the ballpark
MyController : NSObject
{
IBOutlet NSTextField*imagePathField;
IBOutlet NSImageView*imageView;
}
// register controller to receive messages from the text field
- (void) awakeFromNib
{
[imagePathField setDelegate: self];
}
// when user hits return key, the text field calls this handler
allowing you to respond
- (void) controlTextDidEndEditing:(NSNotification *) inNotification
{
// check message type
if ([[inNotification name] isEqualToString:
NSControlTextDidEndEditingNotification])
{
// type OK, check which object sent message. (can be used to
respond
to multipe text fields)
if ([inNotification object] == imagePathField)
{
// get text from field and try to load it into a new
image
NSImage *tempImage = [NSImage
imageWithContentsOfFIe:
[imagePathField stringValue]];
// set the image in the image view
if (tempImage != nil)
[imageView setImage: tempImage];
}
}
}
On Dec 3, 2008, at 10:23 PM, [EMAIL PROTECTED] wrote:
Namaste!
OK, I'm beat for the day...
I'm struggling with how to load an image into an NSImage via
another field's value.
I have a field that contains a path name of an image file. The
user can type it in or select it via OpenFile sheet. This works
just fine and I'm setting the underlying data object so the value
persists.
Now, my question: how do I get that value to propagate over to the image?
In Windows, I can monitor via the onChange event for the textbox.
Piece of cake.
Here, though, I'm a bit perplexed.
I thought perhaps the textDidChange delegate method might do it (I
put that in my File's Owner, and made the File's Owner a delegate
of the NSTextField that contains the image name). However, it
doesn't fire e'en though the text clearly changes (onscreen).
So, how do I accomplish this should-be-easy feat?
Thanks!
Peace, Love, and Light,
/s/ Jon C. Munson II
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NSTimer
Hi, I need to fire the thread repeatedly in regular time intervals. So I used the timer like: timer = [[NSTimer scheduledTimerWithTimeInterval:(double)[txtTimeinterval doubleValue] target:self selector:@selector(myThread:) userInfo:nil repeats:YES]retain]; It is working but, the thread is fired only after the the time interval I had given. But actually I need to begin the thread in 0Sec and then keep the regular time interval. For that I used the code : NSDate* theDate = [NSDate dateWithTimeIntervalSinceReferenceDate:0]; [[timer initWithFireDate:theDate interval:(double)[txtTimeinterval doubleValue] target:self selector:@selector(myThread:) userInfo:nil repeats:YES]retain]; But it is not firing the thread. Where I got wrong? How can I do this? Thanks in advance mahaboob ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
NSRunLoop use to be based on the function select() (it was in GnuStep anyway), it waits for inputs but also has a single timeout value also, NSRunLoop works out how long the timeout value should be for the shortest NSTimer. If you want to wait on multiple timers without using run NSRunLoop then you will have to implement this kind of functionality yourself. You can then just use sleep() to make your thread wait. On 04/12/2008, at 9:32 PM, Påhl Melin wrote: I need to use timers in a low level library where I need to specify asynchronous callbacks to a timer function. I will not have any run loop so I cannot use NSTimer. Are there any low level timer API to use instead? I haven't found anything useful (yet) on google nor ADC. I assume there must exist some Mach or BSD level API:s that can be used? Any suggestions? / Påhl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/nathan_day%40mac.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: self = [super init];
On Dec 3, 2008, at 2:14 PM, EVS wrote: Why does the above line of code not cause a memory leak or memory fault? This may be of interest: http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/chapter_4_section_4.html mmalc ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How To Deal With Rounding Errors
The way floats work the round will always be to the same number of bits no matter what the order of magnitude (ignoring the extreme values 2^-1023 for doubles). Check that you haven't let any integers into you calculations. On 04/12/2008, at 7:08 PM, Bridger Maxwell wrote: Hey, Short version of my question: I believe I am having rounding errors because I am working with really, really small values. Would it help if I multiplied these values by a scalar (say, 1,000), did math with them, and then divided them by the scalar? I remember learning how IEEE floating point numbers are stored, but I can't remember enough about it to know if this would have any effect on precision. If not, what is a good way to get better precision? I am already using doubles instead of floats. Long explanation of my question: In my project, I have users clicking and dragging to adjust values. I would like to map values from the left-most of the view being zero, and the right-most of the view to be one. This is fairly simple. However, it feels a little unnatural if the value initially jumps to match where the mouse clicks before dragging. For example, if the initial value is 0.3, and they click in the middle of the view, the value jumps to 0.5. To take care of this I construct a polynomial which maps 0 to 0, the right-most of the view to 1, and the initial click location (middle) to the initial value (0.3). This works very well, and feels natural. However, when any of the values near the edges (the user clicks just off the left of the view), the values go crazy. I believe this is because of a rounding error. The same question still stands, would multiplying (and later dividing) everything by a scalar help me get greater precision? Thank You, Bridger Maxwell ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/nathan_day%40mac.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How To Deal With Rounding Errors
On 04 Dec 08, at 00:08, Bridger Maxwell wrote: Short version of my question: I believe I am having rounding errors because I am working with really, really small values. Would it help if I multiplied these values by a scalar (say, 1,000), did math with them, and then divided them by the scalar? I remember learning how IEEE floating point numbers are stored, but I can't remember enough about it to know if this would have any effect on precision. If not, what is a good way to get better precision? I am already using doubles instead of floats. No; if anything, multiplying by a constant will reduce your precision slightly. If you're having precision issues with doubles, you are probably manipulating your intermediate values in such a way as to destroy precision (loss of significance). A common culprit is subtracting two values of nearly equal value. Without knowing what your math looks like, it's hard to guess what might be at fault, but rearranging your float math to avoid this sort of thing may improve your results. Goldberg's What Every Computer Scientist Should Know About Floating Point is a worthwhile read, and covers this issue (as well as many other pitfalls) in great detail: http://www.engr.pitt.edu/hunsaker/3097/floatingpoint.pdf ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How To Deal With Rounding Errors
On Dec 4, 2008, at 6:37 AM, Andrew Farmer wrote: On 04 Dec 08, at 00:08, Bridger Maxwell wrote: Short version of my question: I believe I am having rounding errors because I am working with really, really small values. Would it help if I multiplied these values by a scalar (say, 1,000), did math with them, and then divided them by the scalar? I remember learning how IEEE floating point numbers are stored, but I can't remember enough about it to know if this would have any effect on precision. If not, what is a good way to get better precision? I am already using doubles instead of floats. No; if anything, multiplying by a constant will reduce your precision slightly. If you're having precision issues with doubles, you are probably manipulating your intermediate values in such a way as to destroy precision (loss of significance). A common culprit is subtracting two values of nearly equal value. Without knowing what your math looks like, it's hard to guess what might be at fault, but rearranging your float math to avoid this sort of thing may improve your results. Goldberg's What Every Computer Scientist Should Know About Floating Point is a worthwhile read, and covers this issue (as well as many other pitfalls) in great detail: http://www.engr.pitt.edu/hunsaker/3097/floatingpoint.pdf One common thing to do when working with very small values (i.e. values close to zero), is to order your operations. For example, if you have a set of values that you want to compute a sum, adding them in smallest to largest order will often be different than largest to smallest. ___ Ricky A. Sharp mailto:[EMAIL PROTECTED] Instant Interactive(tm) http://www.instantinteractive.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
Yes, I could set up a new thread, handling a list of usleep() intervals between the actual timer events but it would be very hard to make a reliable, drift-free timer service, handling lots of timer events and it would take quite some time to develop a fully functional and reliable version. I really hope I don't have to... In the Kernel Programming Guide in ADC, chapter 7, Mach Overview, Time Management, it says: The mach_timespec_t API is deprecated in Mac OS X. The newer and preferred API is based on timer objects that in turn use AbsoluteTime as the basic data type. AbsoluteTime is a machine-dependent type, typically based on the platform-native time base. Routines are provided to convert AbsoluteTime values to and from other data types, such as nanoseconds. Timer objects support asynchronous, drift-free notification, cancellation, and premature alarms. They are more efficient and permit higher resolution than clocks. Does anyone know about this new API or any higher level API build on it? I sounds like a good candidate for my project. / Påhl 2008/12/4 Nathan Day [EMAIL PROTECTED]: NSRunLoop use to be based on the function select() (it was in GnuStep anyway), it waits for inputs but also has a single timeout value also, NSRunLoop works out how long the timeout value should be for the shortest NSTimer. If you want to wait on multiple timers without using run NSRunLoop then you will have to implement this kind of functionality yourself. You can then just use sleep() to make your thread wait. On 04/12/2008, at 9:32 PM, Påhl Melin wrote: I need to use timers in a low level library where I need to specify asynchronous callbacks to a timer function. I will not have any run loop so I cannot use NSTimer. Are there any low level timer API to use instead? I haven't found anything useful (yet) on google nor ADC. I assume there must exist some Mach or BSD level API:s that can be used? Any suggestions? / Påhl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/nathan_day%40mac.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
Le 4 déc. 08 à 14:00, Påhl Melin a écrit : Yes, I could set up a new thread, handling a list of usleep() intervals between the actual timer events but it would be very hard to make a reliable, drift-free timer service, handling lots of timer events and it would take quite some time to develop a fully functional and reliable version. I really hope I don't have to... In the Kernel Programming Guide in ADC, chapter 7, Mach Overview, Time Management, it says: The mach_timespec_t API is deprecated in Mac OS X. The newer and preferred API is based on timer objects that in turn use AbsoluteTime as the basic data type. AbsoluteTime is a machine-dependent type, typically based on the platform-native time base. Routines are provided to convert AbsoluteTime values to and from other data types, such as nanoseconds. Timer objects support asynchronous, drift-free notification, cancellation, and premature alarms. They are more efficient and permit higher resolution than clocks. Does anyone know about this new API or any higher level API build on it? I sounds like a good candidate for my project. / Påhl 2008/12/4 Nathan Day [EMAIL PROTECTED]: NSRunLoop use to be based on the function select() (it was in GnuStep anyway), it waits for inputs but also has a single timeout value also, NSRunLoop works out how long the timeout value should be for the shortest NSTimer. If you want to wait on multiple timers without using run NSRunLoop then you will have to implement this kind of functionality yourself. You can then just use sleep() to make your thread wait. On 04/12/2008, at 9:32 PM, Påhl Melin wrote: I need to use timers in a low level library where I need to specify asynchronous callbacks to a timer function. I will not have any run loop so I cannot use NSTimer. Are there any low level timer API to use instead? I haven't found anything useful (yet) on google nor ADC. I assume there must exist some Mach or BSD level API:s that can be used? Any suggestions? If you want to avoid Cocoa, Cocoa-dev is probably not the best mailing list to ask. You will have more chance on darwin-dev. What do you mean by low-leve ? What prevent you to use NS classes ? Is this contraint preventing you to use CoreFoundation ? (which is low-level IMHO). If you want lower level primitive, you can use kevent's timers, or if you want really low-level, there is a mach timer API, but I don't think it is considere public as the header cannot be found in /usr/ include/mach Anyway, that's the API used in CoreFoundation for CFTimer and declared in mk_timer.h (see XNU sources for details). But I wont go this way in a shipping product. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
Le 4 déc. 08 à 15:17, Påhl Melin a écrit : 2008/12/4 Jean-Daniel Dupas [EMAIL PROTECTED]: If you want to avoid Cocoa, Cocoa-dev is probably not the best mailing list to ask. You will have more chance on darwin-dev. I don't want to avoid Cocoa, but I just haven't found any Cocoa class that supports timers without a run loop. But maybe I need to switch to darwin-dev. What do you mean by low-leve ? What prevent you to use NS classes ? Is this contraint preventing you to use CoreFoundation ? (which is low-level IMHO). Nothing prevents me from using NS classes per se. I will use the timers in a C++ class and want to get a callback to a normal function—not calling a selector on an Objective-C class that most NS classes would do. And since it's supposed to be the lowest level of my architecture I want it to be as efficient as possible. The only problem I have is that I will run the timers on threads without run loops so both NSTimer and CFRunLoopTimer (I didn't find any reference information about CFTimer on ADC) are impossible to use. Of course, CFTimer was a shortened form for CFRunLoopTimer. If you use timer, you need some primitive function that waits until one timer trigger. I don't understand what is the difference between waiting using select, kevent, or any other primitive and waiting using CFRunLoopRun(). All threads have a runloop (or create one when needed), so I really don't understand what is the problem here. For kevent, I'm surprised the doc say so, it look like it is implemented (at least in 10.4.11 and 10.5 XNU sources). If you want lower level primitive, you can use kevent's timers, or if you want really low-level, there is a mach timer API, but I don't think it is considere public as the header cannot be found in /usr/include/mach In the man page for kevent it says that kevent timers are not supported (EVFILT_TIMER This filter is currently unsupported.). I just assumed that the man page was correct and haven't made any tests. Are you sure kevent timers are implemented in Mac OS X? When it comes to Mach timers I wouldn't dare to use that in a commercial product since Apple seems to ask developers to keep away from Mach. Anyway, that's the API used in CoreFoundation for CFTimer and declared in mk_timer.h (see XNU sources for details). But I wont go this way in a shipping product. Agree... I will keep away from any private API:s. / Påhl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Programmatically loading an NSImage via other field
In continuance...
Alright, so it isn't strictly KVO...:) But it looks like it...:)
Anyway, is there a way to know when the stuff in the cell changes?
Most everything I can find is relative to when the user interacts with
the control. But I can't find anything, as yet, for when the user
doesn't, but the code does...
For instance, when the window displays, there is a value in the text
field for the path/image. Yet the image doesn't load. Is there an
event/method that I can utilize to push the image? I only found
windowDidLoad, which didn't do it.
It also appears that I'll have to implement mine own
MoveNext/MovePrevious methods in order to push the picture (although I
still need to test that first).
Thanks!
Peace, Love, and Light,
/s/ Jon C. Munson II
Quoting [EMAIL PROTECTED]:
In response to all the responses...
This monitoring needs to happen whether the user types in a field,
or, there is a choice made via NSOpenPanel, or the record is scrolled
(meaning moved next, moved previous).
So, using the beginning of the KVO below (which is the route I
suspected I'd have to go, but not sure exactly how), would I need to
add other delegate methods to handle the other cases?
Also, is dragging the delegate from the text field to the File's Owner
the same as the awake from NIB call, or do I need to add the
awakFromNIB as well?
Thanks!
Peace, Love, and Light,
/s/ Jon C. Munson II
Quoting Ken Tozier [EMAIL PROTECTED]:
Something like this should get you in the ballpark
MyController : NSObject
{
IBOutlet NSTextField*imagePathField;
IBOutlet NSImageView*imageView;
}
// register controller to receive messages from the text field
- (void) awakeFromNib
{
[imagePathField setDelegate: self];
}
// when user hits return key, the text field calls this handler
allowing you to respond
- (void) controlTextDidEndEditing:(NSNotification *) inNotification
{
// check message type
if ([[inNotification name] isEqualToString:
NSControlTextDidEndEditingNotification])
{
// type OK, check which object sent message. (can be used to
respond
to multipe text fields)
if ([inNotification object] == imagePathField)
{
// get text from field and try to load it into a new
image
NSImage *tempImage = [NSImage
imageWithContentsOfFIe:
[imagePathField stringValue]];
// set the image in the image view
if (tempImage != nil)
[imageView setImage: tempImage];
}
}
}
On Dec 3, 2008, at 10:23 PM, [EMAIL PROTECTED] wrote:
Namaste!
OK, I'm beat for the day...
I'm struggling with how to load an image into an NSImage via
another field's value.
I have a field that contains a path name of an image file. The
user can type it in or select it via OpenFile sheet. This works
just fine and I'm setting the underlying data object so the value
persists.
Now, my question: how do I get that value to propagate over to the image?
In Windows, I can monitor via the onChange event for the textbox.
Piece of cake.
Here, though, I'm a bit perplexed.
I thought perhaps the textDidChange delegate method might do it (I
put that in my File's Owner, and made the File's Owner a
delegate of the NSTextField that contains the image name).
However, it doesn't fire e'en though the text clearly changes
(onscreen).
So, how do I accomplish this should-be-easy feat?
Thanks!
Peace, Love, and Light,
/s/ Jon C. Munson II
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Webview and streaming data
Dear all I am loading a web page that has a Quicktime streaming file. I was expecting to get the load delegate message didFinishLoadForFrame for the main frame when all the page is loaded and the movie starts playing, but the message is not called at that stage. Does anyone know how I can get to know that the page is fully loaded just before the movie starts playing. Thanks Reza ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSTimer
You could call [self myThread:nil] after you start your timer. Joe K. On Dec 4, 2008, at 3:17 AM, Mahaboob wrote: Hi, I need to fire the thread repeatedly in regular time intervals. So I used the timer like: timer = [[NSTimer scheduledTimerWithTimeInterval:(double) [txtTimeinterval doubleValue] target:self selector:@selector(myThread:) userInfo:nil repeats:YES]retain]; It is working but, the thread is fired only after the the time interval I had given. But actually I need to begin the thread in 0Sec and then keep the regular time interval. For that I used the code : NSDate* theDate = [NSDate dateWithTimeIntervalSinceReferenceDate:0]; [[timer initWithFireDate:theDate interval:(double)[txtTimeinterval doubleValue] target:self selector:@selector(myThread:) userInfo:nil repeats:YES]retain]; But it is not firing the thread. Where I got wrong? How can I do this? Thanks in advance mahaboob ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/joeman%40mac.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
2008/12/4 Jean-Daniel Dupas [EMAIL PROTECTED]: Le 4 déc. 08 à 15:17, Påhl Melin a écrit : 2008/12/4 Jean-Daniel Dupas [EMAIL PROTECTED]: If you want to avoid Cocoa, Cocoa-dev is probably not the best mailing list to ask. You will have more chance on darwin-dev. I don't want to avoid Cocoa, but I just haven't found any Cocoa class that supports timers without a run loop. But maybe I need to switch to darwin-dev. What do you mean by low-leve ? What prevent you to use NS classes ? Is this contraint preventing you to use CoreFoundation ? (which is low-level IMHO). Nothing prevents me from using NS classes per se. I will use the timers in a C++ class and want to get a callback to a normal function—not calling a selector on an Objective-C class that most NS classes would do. And since it's supposed to be the lowest level of my architecture I want it to be as efficient as possible. The only problem I have is that I will run the timers on threads without run loops so both NSTimer and CFRunLoopTimer (I didn't find any reference information about CFTimer on ADC) are impossible to use. Of course, CFTimer was a shortened form for CFRunLoopTimer. If you use timer, you need some primitive function that waits until one timer trigger. I don't understand what is the difference between waiting using select, kevent, or any other primitive and waiting using CFRunLoopRun(). All threads have a runloop (or create one when needed), so I really don't understand what is the problem here. The difference is that my threads will not have any run loops. They will run all the time or sleep on a blocking primitive in my framework. Only Cocoa threads automatically have a run loop (my interpretation). I will run my threads using the pthread library directly so no run loops are created. For kevent, I'm surprised the doc say so, it look like it is implemented (at least in 10.4.11 and 10.5 XNU sources). That's interesting. I will check it out. The man page is from april 14, 2000, so maybe Apple just forgot to update it. If you want lower level primitive, you can use kevent's timers, or if you want really low-level, there is a mach timer API, but I don't think it is considere public as the header cannot be found in /usr/include/mach In the man page for kevent it says that kevent timers are not supported (EVFILT_TIMER This filter is currently unsupported.). I just assumed that the man page was correct and haven't made any tests. Are you sure kevent timers are implemented in Mac OS X? When it comes to Mach timers I wouldn't dare to use that in a commercial product since Apple seems to ask developers to keep away from Mach. Anyway, that's the API used in CoreFoundation for CFTimer and declared in mk_timer.h (see XNU sources for details). But I wont go this way in a shipping product. Agree... I will keep away from any private API:s. / Påhl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
I've used both the CF and NS timer apis in many different situations without a hitch. They're fairly reliable. Perhaps you could explain your can't use a runloop restriction -- e.g. if you are writing a daemon or a kext, this is not the list you want to post to. You might find if you refactor your design a bit, that it will take to a runloop model quite well. In fact, most of the user space IOKit async routines require that you use a runloop. Also, the Mach APIs are not strictly private -- the headers are publicly available. They are subject to change between releases, so if you do start using them, you will need to stay on top of things -- check your binaries on pre-release OS seeds etc. Joe K. On Dec 4, 2008, at 6:17 AM, Påhl Melin wrote: 2008/12/4 Jean-Daniel Dupas [EMAIL PROTECTED]: If you want to avoid Cocoa, Cocoa-dev is probably not the best mailing list to ask. You will have more chance on darwin-dev. I don't want to avoid Cocoa, but I just haven't found any Cocoa class that supports timers without a run loop. But maybe I need to switch to darwin-dev. What do you mean by low-leve ? What prevent you to use NS classes ? Is this contraint preventing you to use CoreFoundation ? (which is low-level IMHO). Nothing prevents me from using NS classes per se. I will use the timers in a C++ class and want to get a callback to a normal function—not calling a selector on an Objective-C class that most NS classes would do. And since it's supposed to be the lowest level of my architecture I want it to be as efficient as possible. The only problem I have is that I will run the timers on threads without run loops so both NSTimer and CFRunLoopTimer (I didn't find any reference information about CFTimer on ADC) are impossible to use. If you want lower level primitive, you can use kevent's timers, or if you want really low-level, there is a mach timer API, but I don't think it is considere public as the header cannot be found in /usr/include/mach In the man page for kevent it says that kevent timers are not supported (EVFILT_TIMER This filter is currently unsupported.). I just assumed that the man page was correct and haven't made any tests. Are you sure kevent timers are implemented in Mac OS X? When it comes to Mach timers I wouldn't dare to use that in a commercial product since Apple seems to ask developers to keep away from Mach. Anyway, that's the API used in CoreFoundation for CFTimer and declared in mk_timer.h (see XNU sources for details). But I wont go this way in a shipping product. Agree... I will keep away from any private API:s. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
2008/12/4 Joseph Kelly [EMAIL PROTECTED]: I've used both the CF and NS timer apis in many different situations without a hitch. They're fairly reliable. Perhaps you could explain your can't use a runloop restriction -- e.g. if you are writing a daemon or a kext, this is not the list you want to post to. I'm not writing a daemon or a kext. I'm porting a framework that I've designed and used on .Net before that will form the foundation of my architecture for my future Mac OS applications (I'm new to Mac OS programming). The framework is used for easy communication and synchronization between threads, processes and computers (with the same syntax) and make it possible to design an application in small modules that communicates via messages and it's straightforward to start with the modules as threads in a single application and then split into several processes on a computer or ever distribute certain modules to other computers without changing much (or any) code at all. But mainly it makes it easier to write efficient multithreaded applications that work. I'm very happy with the messaging framework and would like to use it on Mac OS X as well. Run loops are not compatible with this approach since my threads need to run forever or block in my framework when they are waiting for messages (the timers are used to generate timer messages internally in the framework). The threads are not event driven and will not return to the run loop. You might find if you refactor your design a bit, that it will take to a runloop model quite well. In fact, most of the user space IOKit async routines require that you use a runloop. I don't want to refactor my design. :-) To do that, I would have give up the framework design completely. I'm generally happy with the design just want to make a good port to Mac OS X. Also, the Mach APIs are not strictly private -- the headers are publicly available. They are subject to change between releases, so if you do start using them, you will need to stay on top of things -- check your binaries on pre-release OS seeds etc. Okay, thats great to know. But I suppose it's still begging for trouble, if you can avoid it. Joe K. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
Le 4 déc. 08 à 15:50, Påhl Melin a écrit : 2008/12/4 Jean-Daniel Dupas [EMAIL PROTECTED]: Le 4 déc. 08 à 15:17, Påhl Melin a écrit : 2008/12/4 Jean-Daniel Dupas [EMAIL PROTECTED]: If you want to avoid Cocoa, Cocoa-dev is probably not the best mailing list to ask. You will have more chance on darwin-dev. I don't want to avoid Cocoa, but I just haven't found any Cocoa class that supports timers without a run loop. But maybe I need to switch to darwin-dev. What do you mean by low-leve ? What prevent you to use NS classes ? Is this contraint preventing you to use CoreFoundation ? (which is low-level IMHO). Nothing prevents me from using NS classes per se. I will use the timers in a C++ class and want to get a callback to a normal function—not calling a selector on an Objective-C class that most NS classes would do. And since it's supposed to be the lowest level of my architecture I want it to be as efficient as possible. The only problem I have is that I will run the timers on threads without run loops so both NSTimer and CFRunLoopTimer (I didn't find any reference information about CFTimer on ADC) are impossible to use. Of course, CFTimer was a shortened form for CFRunLoopTimer. If you use timer, you need some primitive function that waits until one timer trigger. I don't understand what is the difference between waiting using select, kevent, or any other primitive and waiting using CFRunLoopRun(). All threads have a runloop (or create one when needed), so I really don't understand what is the problem here. The difference is that my threads will not have any run loops. They will run all the time or sleep on a blocking primitive in my framework. Only Cocoa threads automatically have a run loop (my interpretation). I will run my threads using the pthread library directly so no run loops are created. My understanding is that ALL threads have a runloop (from the CFRunLoop doc): «There is exactly one run loop per thread. You neither create nor destroy a thread’s run loop. Core Foundation automatically creates it for you as needed. » As CoreFoundation is not part of Cocoa, I doubt that only Cocoa thread can have a CFRunLoop. (In fact, I do not doubt, i'm pretty sure CoreFoundation is based on pthread and do not use Cocoa at all). I did tool that do not use obj-c at all and use pthread and CFRunLoop to managed networks events (using CFSocket) and it works just as it should. For kevent, I'm surprised the doc say so, it look like it is implemented (at least in 10.4.11 and 10.5 XNU sources). That's interesting. I will check it out. The man page is from april 14, 2000, so maybe Apple just forgot to update it. If you want lower level primitive, you can use kevent's timers, or if you want really low-level, there is a mach timer API, but I don't think it is considere public as the header cannot be found in /usr/include/mach In the man page for kevent it says that kevent timers are not supported (EVFILT_TIMER This filter is currently unsupported.). I just assumed that the man page was correct and haven't made any tests. Are you sure kevent timers are implemented in Mac OS X? When it comes to Mach timers I wouldn't dare to use that in a commercial product since Apple seems to ask developers to keep away from Mach. Anyway, that's the API used in CoreFoundation for CFTimer and declared in mk_timer.h (see XNU sources for details). But I wont go this way in a shipping product. Agree... I will keep away from any private API:s. / Påhl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: custom view binding to NSTreeController
As far as I know it's the only way, all the examples I've ever seen use a similar method. Array iteration is pretty fast and I can only imagine it being slow for a very large data set. I've definitely never had performance issues with it, but I am not creating large trees. I also would love to hear from Apple if there's a better way. It's certainly a shame there is not more example code out there. I agree it's a shame. There are plenty of examples for simpler binding scenarios, but none I have found for custom views binding to NSTreeController. I really appreciate your sample will do something similar if I don't find a better way. You're right that it will be fast for smaller data sets. The problem is that it should be a constant time operation and your code is much more expensive than that. Depending on the implementation of removeItemsInArray your code is at least O(n) and it is likely to be O (n2). That will not scale to large data sets very well. Matthew ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Programmatically loading an NSImage via other field
My example wasn't, strictly speaking, KVO. To set up an observer you
would need to do something like the following
@interface
MYController : NSObject
{
IBOutlet NSTextField *imagePath;
}
@end
@implementation
- (id) init
{
self = [super init];
if (self)
{
[self addObservers];
}
return self;
}
- (void) addObservers
{
[imagePath addObserver: self
forKeyPath: @value
options: NSKeyValueObservingOptionOld |
NSKeyValueObservingOptionNew
context: NULL];
}
- (void) observeValueForKeyPath:(NSString *) inKeyPath
ofObject:(id) inObject
change:(NSDictionary *) inChange
context:(void *) inContext
{
if ([inKeyPath isEqualToString: @value])
{
if (inObject == imagePath)
{
NSString *oldValue = [[inChange objectForKey:
NSKeyValueChangeOldKey] stringValue],
*newValue = [[inChange objectForKey: NSKeyValueChangeNewKey]
stringValue];
/* decide whether the difference between oldValue and newValue
warrants loading a new image */
}
}
}
I'm not 100 percent certain you can bind to the value of a text field
this way (haven't tried it) but the above is the way you observe
properties of objects. Another approach would be to write a subclass
of NSTextField and override the setValue method. That way, whenever
something tries to change the field, you know about it.
- (void) setValue:(id) inVaue
{
[super setValue: inVaue];
/* do image load here if change warrants an action */
}
As to dragging connectors, that doesn't set up a binding, it basically
just associates a GUI element with a property of your controller. It
just says this text field corresponds with this outlet in my
controller. It gives you a way to refer to specific gui objects in
your code which you can see used in addObservers above. There are no
actions associated with this connection you have to establish the
behavior yourself using bindings, kvo, subclassing etc
On Dec 4, 2008, at 5:55 AM, [EMAIL PROTECTED] wrote:
In response to all the responses...
This monitoring needs to happen whether the user types in a field,
or, there is a choice made via NSOpenPanel, or the record is
scrolled (meaning moved next, moved previous).
So, using the beginning of the KVO below (which is the route I
suspected I'd have to go, but not sure exactly how), would I need to
add other delegate methods to handle the other cases?
Also, is dragging the delegate from the text field to the File's
Owner the same as the awake from NIB call, or do I need to add the
awakFromNIB as well?
Thanks!
Peace, Love, and Light,
/s/ Jon C. Munson II
Quoting Ken Tozier [EMAIL PROTECTED]:
Something like this should get you in the ballpark
MyController : NSObject
{
IBOutlet NSTextField*imagePathField;
IBOutlet NSImageView*imageView;
}
// register controller to receive messages from the text field
- (void) awakeFromNib
{
[imagePathField setDelegate: self];
}
// when user hits return key, the text field calls this handler
allowing you to respond
- (void) controlTextDidEndEditing:(NSNotification *) inNotification
{
// check message type
if ([[inNotification name] isEqualToString:
NSControlTextDidEndEditingNotification])
{
// type OK, check which object sent message. (can be used to
respond
to multipe text fields)
if ([inNotification object] == imagePathField)
{
// get text from field and try to load it into a new
image
NSImage *tempImage = [NSImage
imageWithContentsOfFIe:
[imagePathField stringValue]];
// set the image in the image view
if (tempImage != nil)
[imageView setImage: tempImage];
}
}
}
On Dec 3, 2008, at 10:23 PM, [EMAIL PROTECTED] wrote:
Namaste!
OK, I'm beat for the day...
I'm struggling with how to load an image into an NSImage via
another field's value.
I have a field that contains a path name of an image file. The
user can type it in or select it via OpenFile sheet. This works
just fine and I'm setting the underlying data object so the value
persists.
Now, my question: how do I get that value to propagate over to
the image?
In Windows, I can monitor via the onChange event for the
textbox. Piece of cake.
Here, though, I'm a bit perplexed.
I thought perhaps the textDidChange delegate method might do it
(I put that in my File's Owner, and made the File's Owner a
delegate of the NSTextField that contains the image name).
However, it doesn't fire e'en though the text clearly changes
(onscreen).
So, how do I accomplish this should-be-easy feat?
Thanks!
Re: Asynchronous timers (without a run loop)
If I were trying to generate an asynchronous timer event in C I'd probably just run a thread in a tight loop calling poll (man 2 poll for details) each time round with a timeout equal to your timer interval and no other events. And when the poll returns do whatever processing you need on your timer. Will that not work for you? Otherwise your question seems to be How can I use any of the high level Mac OS X timer facilities without using the high level Mac OS X timer facilities? for which there is, of course, no answer. On 4 Dec 2008, at 15:14, Påhl Melin wrote: 2008/12/4 Joseph Kelly [EMAIL PROTECTED]: I've used both the CF and NS timer apis in many different situations without a hitch. They're fairly reliable. Perhaps you could explain your can't use a runloop restriction -- e.g. if you are writing a daemon or a kext, this is not the list you want to post to. I'm not writing a daemon or a kext. I'm porting a framework that I've designed and used on .Net before that will form the foundation of my architecture for my future Mac OS applications (I'm new to Mac OS programming). The framework is used for easy communication and synchronization between threads, processes and computers (with the same syntax) and make it possible to design an application in small modules that communicates via messages and it's straightforward to start with the modules as threads in a single application and then split into several processes on a computer or ever distribute certain modules to other computers without changing much (or any) code at all. But mainly it makes it easier to write efficient multithreaded applications that work. I'm very happy with the messaging framework and would like to use it on Mac OS X as well. Run loops are not compatible with this approach since my threads need to run forever or block in my framework when they are waiting for messages (the timers are used to generate timer messages internally in the framework). The threads are not event driven and will not return to the run loop. You might find if you refactor your design a bit, that it will take to a runloop model quite well. In fact, most of the user space IOKit async routines require that you use a runloop. I don't want to refactor my design. :-) To do that, I would have give up the framework design completely. I'm generally happy with the design just want to make a good port to Mac OS X. Also, the Mach APIs are not strictly private -- the headers are publicly available. They are subject to change between releases, so if you do start using them, you will need to stay on top of things -- check your binaries on pre-release OS seeds etc. Okay, thats great to know. But I suppose it's still begging for trouble, if you can avoid it. Joe K. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
String Constant containing 2 ASCII Control Chars
I'd like to define a global string constant consisting of two ASCII start-of-text (STX, 0x02) characters. The following ^code^ will create such a thing: NSString* two = [[NSString alloc] initWithFormat:@%C%C, 0x2, 0x2] ; and I realize that I could put it in some +initialize method for a class that was guaranteed to be created, but that solution is rather fragile, non-portable, etc. I also appreciate that I'm creating an object, but gee it's a really simple object, and since Xcode can do this: NSString* const hello = @Hello ; Is there a way to put non-printing characters in a constant string like that? Thanks, Jerry Krinock ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSTimer
On Thu, Dec 4, 2008 at 12:17 PM, Mahaboob [EMAIL PROTECTED] wrote: Hi, For that I used the code : NSDate* theDate = [NSDate dateWithTimeIntervalSinceReferenceDate:0]; Unless I am mistaken, this will create a date set to January 1st, 2001. To get a date representing now, you can use [NSDate date]. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: String Constant containing 2 ASCII Control Chars
Le 4 déc. 08 à 16:42, Jerry Krinock a écrit : I'd like to define a global string constant consisting of two ASCII start-of-text (STX, 0x02) characters. The following ^code^ will create such a thing: NSString* two = [[NSString alloc] initWithFormat:@%C%C, 0x2, 0x2] ; and I realize that I could put it in some +initialize method for a class that was guaranteed to be created, but that solution is rather fragile, non-portable, etc. I also appreciate that I'm creating an object, but gee it's a really simple object, and since Xcode can do this: NSString* const hello = @Hello ; Is there a way to put non-printing characters in a constant string like that? Yes, either using octal escape sequence NSString *two = @\2\2; or hexa escape sequence NSString *two = @\x2\x2; ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
I don't mean to sound patronizing, but unless I have missed some fundamental premise, didn't you just re-invent DO? Maybe the right way to port this framework is to make your API a thin wrapper on top of Obj-C messages, and your set up a wrapper on top of DO setup. Just a thought. - Dave.S On Thu, Dec 4, 2008 at 8:41 AM, Jeremy Pereira [EMAIL PROTECTED] wrote: If I were trying to generate an asynchronous timer event in C I'd probably just run a thread in a tight loop calling poll (man 2 poll for details) each time round with a timeout equal to your timer interval and no other events. And when the poll returns do whatever processing you need on your timer. Will that not work for you? Otherwise your question seems to be How can I use any of the high level Mac OS X timer facilities without using the high level Mac OS X timer facilities? for which there is, of course, no answer. On 4 Dec 2008, at 15:14, Påhl Melin wrote: 2008/12/4 Joseph Kelly [EMAIL PROTECTED]: I've used both the CF and NS timer apis in many different situations without a hitch. They're fairly reliable. Perhaps you could explain your can't use a runloop restriction -- e.g. if you are writing a daemon or a kext, this is not the list you want to post to. I'm not writing a daemon or a kext. I'm porting a framework that I've designed and used on .Net before that will form the foundation of my architecture for my future Mac OS applications (I'm new to Mac OS programming). The framework is used for easy communication and synchronization between threads, processes and computers (with the same syntax) and make it possible to design an application in small modules that communicates via messages and it's straightforward to start with the modules as threads in a single application and then split into several processes on a computer or ever distribute certain modules to other computers without changing much (or any) code at all. But mainly it makes it easier to write efficient multithreaded applications that work. I'm very happy with the messaging framework and would like to use it on Mac OS X as well. Run loops are not compatible with this approach since my threads need to run forever or block in my framework when they are waiting for messages (the timers are used to generate timer messages internally in the framework). The threads are not event driven and will not return to the run loop. You might find if you refactor your design a bit, that it will take to a runloop model quite well. In fact, most of the user space IOKit async routines require that you use a runloop. I don't want to refactor my design. :-) To do that, I would have give up the framework design completely. I'm generally happy with the design just want to make a good port to Mac OS X. Also, the Mach APIs are not strictly private -- the headers are publicly available. They are subject to change between releases, so if you do start using them, you will need to stay on top of things -- check your binaries on pre-release OS seeds etc. Okay, thats great to know. But I suppose it's still begging for trouble, if you can avoid it. Joe K. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/adc%40jeremyp.net This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/dspringer%40google.com This email sent to [EMAIL PROTECTED] -- http://go/OnlyCheckEmailTwiceADay - join the movement ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
[SOLVED] RE: Determining unreleased objects after Quit
Just to close the thread... This problem resolved itself. I didn't do nothing... I suspect kaboshed bindings in a window/form. Peace, Love, and Light, Jon C. Munson II And Jesus looking upon them saith, With men it is impossible, but not with God: for with God all things are possible. [Mark 10:27; KJV] I sign Peace, Love, and Light for at least two reasons. First, it is my truest desire for this planet and her people to live in Peace, with Love, and in the Light of God. Second, to be an Ascended Master, one must Be. As I wish to Be an Ascended Master (someday if not sooner), I must also Be - thus I choose to Be Peace, Love, and Light as much as I can for everyone and am therefore reflecting those thoughts to you. -Original Message- From: Joseph Kelly [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2008 4:27 PM To: [EMAIL PROTECTED]; cocoa dev Subject: Re: Determining unreleased objects after Quit On Dec 3, 2008, at 9:06 AM, Randall Meadows wrote: On Dec 3, 2008, at 9:38 AM, Jon C. Munson II wrote: Namaste! In my application, when I choose File-Quit, the application appears to terminate. HOWEVER, it doesn't. SOMETHING(s) is(are) left unreleased. Is there a handy way to determine what the object(s) is(are)? When your app quits, all of its memory used it released back to the system. However, your deallocs and such will NOT be called, since that would be a waste of time since everything's going to be released back to the system anyway. It's a shortcut, and usually is in your best interest. It can, however, bite you in certain situations, specifically non- memory resources that you need to do something with at termination. In my case, I needed to release access to a camera, so I had to do some of my cleanup work in -applicationWillTerminate:. This is correct. I'm not sure exactly the mechanism -- and I suspect it has something to do with Mach ports owned by the process which are not shut down correctly -- but I've encountered a case where my app appears open in the Dock, but does not appear in the bsd, Process Manager, or Mach process lists. This only happens when the app terminates abnormally, and our shutdown sequence does not execute. I've also noticed that aborting a Debug session in Xcode 3.1.1 will sometimes result in the app not quite going away, I presume also as a result of having mach ports in a weird state. Joe K. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSTimer
On Dec 4, 2008, at 4:47 PM, Mahaboob wrote: Hi, I need to fire the thread repeatedly in regular time intervals. So I used the timer like: timer = [[NSTimer scheduledTimerWithTimeInterval:(double) [txtTimeinterval doubleValue] target:self selector:@selector(myThread:) userInfo:nil repeats:YES]retain]; It is working but, the thread is fired only after the the time interval I had given. But actually I need to begin the thread in 0Sec and then keep the regular time interval. For that I used the code : NSDate* theDate = [NSDate dateWithTimeIntervalSinceReferenceDate:0]; [[timer initWithFireDate:theDate interval:(double)[txtTimeinterval doubleValue] target:self selector:@selector(myThread:) userInfo:nil repeats:YES]retain]; But it is not firing the thread. Where I got wrong? at least the following: 1) you appear to be misusing the initializer; you should have timer = [[NSTimer alloc] initWithFireDate...]; 2) you should be using theDate = [NSDate dateWithTimeIntervalSinceNow:0] 3) you haven't added the timer to a runloop, so it's never scheduled, and will never fire smime.p7s Description: S/MIME cryptographic signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Controlled Font Substitution
On 4 Dec 2008, at 01:34, Aki Inoue wrote: Mac OS X ships with Thonburi as the Thai system font, and that's the font usually you get for Thai character substitution. Yes. And Thonburi is much more readable than Lucida Grande, which was used on Tiger. The font substitution system is applying sophisticated algorithm to closely match font traits, and it appears it's causing the random fallback. The most sophisticated algorithm cannot work correctly if supplied with wrong data: starting from Monaco (a mono spaced font) it probably should look for another mono spaced font containing Thai characters. But the Apple supplied Ayuthaya font, which looks very much like a mono spaced font to me, has no NSFontMonoSpaceTrait set, and returns isFixedPitch = NO. In the meantime, if you want to control the font substitution behavior, you can create fonts with NSFontDescriptor that has custom NSFontCascadeListAttribute. I added the following: CGFloat size = [ font pointSize ]; NSFontDescriptor *fode2 = [ NSFontDescriptor fontDescriptorWithName: @Ayuthaya size: size ]; NSArray *fodArray = [ NSArray arrayWithObject: fode2 ]; NSDictionary *fodDict = [ NSDictionary dictionaryWithObject: fodArray forKey: NSFontCascadeListAttribute ]; NSFontDescriptor *fode1 = [ font fontDescriptor ]; NSFontDescriptor *fode0 = [ fode1 fontDescriptorByAddingAttributes: fodDict ]; font = [ NSFont fontWithDescriptor: fode0 size: size ]; and now my app displays readable mono spaced Thai characters. Thank you very much! But Console.app and Terminal.app were still using UPC-Angsana. So I moved the font from ~/Library/Fonts to /ibrary/Fonts which obviously changed the order in which fonts were searched. Now both Console.app and Terminal.app create nice and readable Thai characters. Kind regards, Gerriet. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
The question itself does not make a lot of sense for me. A timer API is tightly bound to the underlying framework that is idling your thread. If the idling API is CFRunLoopRun(), you'd use CFTimers, if your idling API is select() or kevent(), you'd use their timeout parameters. So, for what you seem to say, it's your framework responsibility to provide some asynchronous timer API. If it does not, your only choice is to simulate the timer using other means: - the easy one: one thread that sleeps() for each timer then messages back to your threads - a more complex one is to use a dedicated thread that will effectively run a CFRunLoop and bridge your timers over CFTimers. - you could imagine using signal() +SIGALRM bug using Unix signals here is really not something you should try to use except if you really know what you are doing. -- Julien On Thu, Dec 4, 2008 at 4:14 PM, Påhl Melin [EMAIL PROTECTED] wrote: 2008/12/4 Joseph Kelly [EMAIL PROTECTED]: I've used both the CF and NS timer apis in many different situations without a hitch. They're fairly reliable. Perhaps you could explain your can't use a runloop restriction -- e.g. if you are writing a daemon or a kext, this is not the list you want to post to. I'm not writing a daemon or a kext. I'm porting a framework that I've designed and used on .Net before that will form the foundation of my architecture for my future Mac OS applications (I'm new to Mac OS programming). The framework is used for easy communication and synchronization between threads, processes and computers (with the same syntax) and make it possible to design an application in small modules that communicates via messages and it's straightforward to start with the modules as threads in a single application and then split into several processes on a computer or ever distribute certain modules to other computers without changing much (or any) code at all. But mainly it makes it easier to write efficient multithreaded applications that work. I'm very happy with the messaging framework and would like to use it on Mac OS X as well. Run loops are not compatible with this approach since my threads need to run forever or block in my framework when they are waiting for messages (the timers are used to generate timer messages internally in the framework). The threads are not event driven and will not return to the run loop. You might find if you refactor your design a bit, that it will take to a runloop model quite well. In fact, most of the user space IOKit async routines require that you use a runloop. I don't want to refactor my design. :-) To do that, I would have give up the framework design completely. I'm generally happy with the design just want to make a good port to Mac OS X. Also, the Mach APIs are not strictly private -- the headers are publicly available. They are subject to change between releases, so if you do start using them, you will need to stay on top of things -- check your binaries on pre-release OS seeds etc. Okay, thats great to know. But I suppose it's still begging for trouble, if you can avoid it. Joe K. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/jjalon%40gmail.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Linking CFBundle with static libraries
On Dec 4, 2008, at 3:48 AM, frank wrote: the problem was with the way I was building my libraries; I was using the Generate Position-Dependent Code from the GCC 4.0 Code Generation options. Once I disabled this my bundle built without any problems. Yeah, that would do it. That option only works with applications; it makes libraries unusable. Nick Zitzmann http://www.chronosnet.com/ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
On Dec 4, 2008, at 7:14 AM, Påhl Melin wrote:
I'm very happy with the messaging framework and would like to use it
on Mac OS X as well. Run loops are not compatible with this approach
since my threads need to run forever or block in my framework when
they are waiting for messages (the timers are used to generate timer
messages internally in the framework).
To give you some perspective, that's exactly what Runloops do. They
block a thread indefinitely until a message comes in, at which point
the thread unblocks and begins executing some kind of callback
routine. When the callback returns, the thread blocks again until the
next message comes in. Runloops are simply an abstraction that
associates an arbitrary thread with a set (or sets) of triggers which
cause the thread to unblock and do something.
So for instance, to give you a top level overview of how this might
work -- this is a rough C example, but could be adapted to an OOP model:
CFRunLoopRef gWorkerThreadRLoop = NULL; // this could be a global
variable or a member variable of a C++ or ObjC object.
main(...)
{
SpawnAThread(MyThreadRoutine); // you could use pthreads, or
NSThread, or even Boost threads.
while(gWorkerThreadRLoop == NULL); // prbly add a timeout / sleep
here.
// init some other stuff
... Run the Main Thread's Runloop...
// Something causes us to wake up, so lets forward a message to the
worker thread:
TriggerAMessage(gWorkerThreadRLoop, msg1);
TriggerAMessage(gWorkerThreadRLoop, msg2);
...
// time to quit
CFRunLoopStop(gWorkerThreadRLoop)
}
MyThreadRoutine(...)
{
gWorkerThreadRLoop = CFRunLoopGetCurrent(); // this will
automatically/implicitly create the runloop associated w/ this thread.
... add the timer and other sources...
CFRunLoopRun();
... remove my sources / timers...
gWorkerThreadRLoop = NULL;
}
MsgDispatcher(incomingMsg) // this gets called on the worker thread in
response to TriggerAMessage
{
// Dispatch the incomingMsg
}
If this looks suitable, I can give you more details about how to
implement.
Joe K.
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Re: How to display simple dialog at application startup?
See http://www.stepwise.com/Articles/2006/eb1/index.html ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
[NSButtonCell] How to ask for refresh when a window resigns from being the key window
I have a subclass of NSButtonCell that uses a customized version of: - (void) drawImage:(NSImage*) inImage withFrame:(NSRect) inFrame inView:(NSView*) inControlView; for radio buttons. The issue I have is when the window that contains the cell resigns from being the key window: - If the state of the cell is NSOnState, the cell is refreshed. - If the state of the cell is NSOffState, the cell is not refreshed (this is probably an optimization since in the standard case, the look is the same when the window is either key or not). Problem: I want the cell to be refreshed even if the state is NSOnState. Question: - Which method should be overwritten to request a refresh whatever the state of the cell is? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Big picture relationships between NSConnection, NSInputStream, NSOutputStream etc
On Thu, Dec 4, 2008 at 1:22 AM, Ken Tozier [EMAIL PROTECTED] wrote: Thanks Mike Still trying to get my head around this stuff, but here's how I interpret what I need to do... Create a connection to MySQL #define DEFAULT_MYSQL_PORT_NUMBER 3306 socket = [[NSSocketPort alloc] initRemoteWithTCPPort: DEFAUT_MYSQL_PORT_NUMBER host: @some host]; Register as the delegate of the port [socket setDelegate: self]; Add to run loop [[NSRunLoop mainRunLoop] addPort: socket forMode: NSDefaultRunLoopMode]; Here's where I lose the thread. As the delegate, do I need to implement - (void) handlePortMessage:(NSPortMessage *) inPortMessage Or, because I'm dealing with something that has no concept of NSPortMessage, do I need to use NSInput/NSOutput streams? Yes. NSPort is part of the Distributed Objects system. It's possible to use NSPort on its own, but you must use it to talk to another process which also uses NSPort. It is *possible* to use NSSocketPort to create a socket which you then communicate with using other techniques, but you can't use NSSocketPort directly to talk to a non-Cocoa app. If so, where in the process do I squeeze those in? Just replace the above code with code that creates a pair of NSStreams to your target. Also very confused about which stream I would receive replies from MySQL (assuming I could successfully connect) If I send a message through an NSOutputStream, wouldn't MySQL send the reply back through the same stream? I don't see how it could do otherwise as it has no idea who the client app is, or how to connect and build it's own NSOutput stream with which to reply. You'll have a pair of NSStreams which wrap the same socket. When you write to your NSOutputStream the data will be written to the socket, and when the other end writes to the socket, it will appear on your NSInputStream. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Live image preview, huge memory usage...
See http://theocacao.com/document.page/497 See http://www.wilshipley.com/blog/2005/09/jpeg2000-cool-but-slow.html See http://www.macresearch.org/cocoa-tutorial-image-kit-and-image-browser-views-part-i See http://www.macresearch.org/cocoa-tutorial-image-kit-cover-flow-and-quicklook-doing-things-we-shouldnt-are-too-fun-resist ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Beginner memory management question
A few things to note:
As was already pointed out, you meant if(newName != nil) [newName release],
but note that it's not an error to send a message to nil (as long as you're
not using a return value, then there are rules as to whether it's safe or
not), so you could just do [newName release].
Also, retain returns the argument for a good reason, to allow you to write
newName = [[stockName stringValue] retain].
Finally, what if the current value of newName and [stockName stringValue]
are the same instance? Then you're releasing it before you're retaining it.
In this case, stockName has still retained it, so no harm done. But consider
a method like this:
-(void) setSomeValue: (NSString*) newVal {
[curVal release];
curVal = [newVal retain];
}
If you call that with the same value that curVal already has, and no other
code anywhere is holding a retain, then you can wind up dealloc'ing curVal,
which is newVal, before you retain it.
So, a couple of ways to deal with this:
-(void) setSomeValue: (NSString*) newVal {
[curVal autorelease];
curVal = [newVal retain];
}
-(void) setSomeValue: (NSString*) newVal {
if( newVal != curVal ) {
[curVal release];
curVal = [newVal retain];
}
}
Or use properties, or use garbage collection--assuming your project's
targeted versions/platforms will allow you to.
Above all, read this before going any further:
http://developer.apple.com/documentation/Cocoa/Conceptual/MemoryMgmt/Tasks/
MemoryManagementRules.html
--
Scott Ribe
[EMAIL PROTECTED]
http://www.killerbytes.com/
(303) 722-0567 voice
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Re: Programmatically loading an NSImage via other field
Namaste!
OK, I've been playing around with this for too long now...
NOTHING gets called when text in a control is set via code or a
mechanism other than strict keyboard/mouse entry by the user from what
I can determine. This, in a word, is not good.
I've set up an observer, delegates, and all that, per previous posts
and only when keys are actually pressed do the delegate methods get
called.
Also, I've noticed that when the record is moved (either next or
previous), there is a buffer time between when code executes and the
interface gets changed.
Thus:
- (IBAction)movePrevious:(id)sender
{
[tblPattern selectPrevious:self];
[btnPrevious setEnabled:[tblPattern canSelectPrevious]];
[self pushPicture];
}
Doesn't work. The Apple dox state the reason the move action is moved
to another process is to give the error mechanism a way to respond.
As a consequence, nothing changes and the code executes, then the
stuff changes. What happens is the previous image gets loaded as the
current image, despite what the textfield says.
Not good.
For a simple OnChange thing, this is absolutely frustrating (and has
resulted in quite a bit of code).
Bottom line is, it looks like I need some way to see changes that
were made to either the underlying Cell (thinking along the lines of
display changes) or some other route to take this.
I have three scenarios under which the image needs to get pushed:
1. When selected from a file.
2. On Window display - first record is displayed.
3. When records are scrolled (Move Next/Move Previous).
I've solved #1, though I don't like having to manually push the
image (meaning I call the pushPicture routine). 2 3 are still
unsolved at this point.
Any further thoughts??? Anyone else only keep paths to images and
dynamically load from that data? Storing the pictures in the data
structure is not going to happen as they'll take up far too much space
and suck resources.
Thanks for all the help so far!
Peace, Love, and Light,
/s/ Jon C. Munson II
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Re: NSTimer
On Dec 4, 2008, at 4:17 AM, Mahaboob wrote: Hi, I need to fire the thread repeatedly in regular time intervals. So I used the timer like: timer = [[NSTimer scheduledTimerWithTimeInterval:(double) [txtTimeinterval doubleValue] target:self selector:@selector(myThread:) userInfo:nil repeats:YES]retain]; It is working but, the thread is fired only after the the time interval I had given. But actually I need to begin the thread in 0Sec and then keep the regular time interval. For that I used the code : Just a note, you don't have to wait for the timer to fire, you can call -fire directly right after construction to get 0s fire. HTH, Keary Suska Esoteritech, Inc. Demystifying technology for your home or business ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Asynchronous timers (without a run loop)
On Thu, Dec 4, 2008 at 8:00 AM, Påhl Melin [EMAIL PROTECTED] wrote: Yes, I could set up a new thread, handling a list of usleep() intervals between the actual timer events but it would be very hard to make a reliable, drift-free timer service, handling lots of timer events and it would take quite some time to develop a fully functional and reliable version. I really hope I don't have to... You know, if you set up a new thread, then run an NSRunLoop on it and schedule timers on that, then you will get a reliable, drift-free timer service, handling lots of timer events, fully functional and reliable, with approximately zero work on your part. If you can use a separate thread, you can use a runloop. I don't see why you're trying to avoid them, perhaps you're unaware of this fact? Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
On Tiger I get one Help Menu On Leopard I get two Help Menus Has anyone seen this before? Is there some brain dead thing I am missing? Am I brain dead? My boss thinks I am because of this problem. arrghh! On Dec 4, 2008, at 12:39 AM, David Blanton wrote: I have been required to develop and build with Xcode 2.41 on 10.4.11. In testing on 10.5.5 I get two help menus. Is there something I need to do for Help on 10.5.x ? David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale% 40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
Have you tried searching this list's archives? This is a FAQ. On Thu, Dec 4, 2008 at 12:36 PM, David Blanton [EMAIL PROTECTED] wrote: On Tiger I get one Help Menu On Leopard I get two Help Menus Has anyone seen this before? Is there some brain dead thing I am missing? Am I brain dead? My boss thinks I am because of this problem. arrghh! On Dec 4, 2008, at 12:39 AM, David Blanton wrote: I have been required to develop and build with Xcode 2.41 on 10.4.11. In testing on 10.5.5 I get two help menus. Is there something I need to do for Help on 10.5.x ? David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale%40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/idiotsavant2005%40gmail.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
'twould help to have a little more info on what you are doing, done, etc., in order to shed light on your situation... For instance: are you creating a menu item called Help, or are you sticking with the out-of-the-box menu item? Peace, Love, and Light, /s/ Jon C. Munson II Quoting David Blanton [EMAIL PROTECTED]: On Tiger I get one Help Menu On Leopard I get two Help Menus Has anyone seen this before? Is there some brain dead thing I am missing? Am I brain dead? My boss thinks I am because of this problem. arrghh! On Dec 4, 2008, at 12:39 AM, David Blanton wrote: I have been required to develop and build with Xcode 2.41 on 10.4.11. In testing on 10.5.5 I get two help menus. Is there something I need to do for Help on 10.5.x ? David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale%40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/jmunson%40his.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
Out of the box menu with two items: app help app register app help has key equivalent ? On Leopard I get the Help Menu with Spotlight followed by the two aforementioned entries but app help does not have the key equivalent. Next to this menu I get another Help Menu with only the app help entry and it has the key equivalent. I did read the release notes for Leopard and while there are a number of changes re NSMenu and NSMenuItem nothing seemed to address this enigmatic behaviour. On Dec 4, 2008, at 10:40 AM, [EMAIL PROTECTED] wrote: 'twould help to have a little more info on what you are doing, done, etc., in order to shed light on your situation... For instance: are you creating a menu item called Help, or are you sticking with the out-of-the-box menu item? Peace, Love, and Light, /s/ Jon C. Munson II Quoting David Blanton [EMAIL PROTECTED]: On Tiger I get one Help Menu On Leopard I get two Help Menus Has anyone seen this before? Is there some brain dead thing I am missing? Am I brain dead? My boss thinks I am because of this problem. arrghh! On Dec 4, 2008, at 12:39 AM, David Blanton wrote: I have been required to develop and build with Xcode 2.41 on 10.4.11. In testing on 10.5.5 I get two help menus. Is there something I need to do for Help on 10.5.x ? David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale% 40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/jmunson%40his.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale% 40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
No. I searched Apple Developer. Duh. Will do so now. On Dec 4, 2008, at 10:38 AM, I. Savant wrote: Have you tried searching this list's archives? This is a FAQ. On Thu, Dec 4, 2008 at 12:36 PM, David Blanton [EMAIL PROTECTED] wrote: On Tiger I get one Help Menu On Leopard I get two Help Menus Has anyone seen this before? Is there some brain dead thing I am missing? Am I brain dead? My boss thinks I am because of this problem. arrghh! On Dec 4, 2008, at 12:39 AM, David Blanton wrote: I have been required to develop and build with Xcode 2.41 on 10.4.11. In testing on 10.5.5 I get two help menus. Is there something I need to do for Help on 10.5.x ? David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale% 40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/idiotsavant2005% 40gmail.com This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Custom Window Resize Image
I'm not needing to know how to draw it, I'm needing to know how to make it functional. so if someone clicks and drags it would resize the window. On Dec 3, 2008, at 11:22 PM, Aby wrote: Hi, NSDrawNinePartImage may do the job... Regards Abin On 12/4/08, Mr. Gecko [EMAIL PROTECTED] wrote: Hello, I'm writing a custom window for my application, but I can't figure out how to make a custom resize image... Any help? Thanks, Mr. Gecko ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/abinthomas.parecattil%40gmail.com This email sent to [EMAIL PROTECTED] -- Aby ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
I searched the list archives to no avail. I do not believe that I am the only one to see this problem ... the code is vanilla IB menu stuff On Dec 4, 2008, at 10:53 AM, David Blanton wrote: No. I searched Apple Developer. Duh. Will do so now. On Dec 4, 2008, at 10:38 AM, I. Savant wrote: Have you tried searching this list's archives? This is a FAQ. On Thu, Dec 4, 2008 at 12:36 PM, David Blanton [EMAIL PROTECTED] wrote: On Tiger I get one Help Menu On Leopard I get two Help Menus Has anyone seen this before? Is there some brain dead thing I am missing? Am I brain dead? My boss thinks I am because of this problem. arrghh! On Dec 4, 2008, at 12:39 AM, David Blanton wrote: I have been required to develop and build with Xcode 2.41 on 10.4.11. In testing on 10.5.5 I get two help menus. Is there something I need to do for Help on 10.5.x ? David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale% 40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/idiotsavant2005% 40gmail.com This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale% 40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
Use cocoa builder or Google to search: http://www.google.com/search?q=duplicate+help+menu+site%3Alists.apple.com http://www.cocoabuilder.com/archive/message/cocoa/2007/7/30/186910 Le 4 déc. 08 à 19:05, David Blanton a écrit : I searched the list archives to no avail. I do not believe that I am the only one to see this problem ... the code is vanilla IB menu stuff On Dec 4, 2008, at 10:53 AM, David Blanton wrote: No. I searched Apple Developer. Duh. Will do so now. On Dec 4, 2008, at 10:38 AM, I. Savant wrote: Have you tried searching this list's archives? This is a FAQ. On Thu, Dec 4, 2008 at 12:36 PM, David Blanton [EMAIL PROTECTED] wrote: On Tiger I get one Help Menu On Leopard I get two Help Menus Has anyone seen this before? Is there some brain dead thing I am missing? Am I brain dead? My boss thinks I am because of this problem. arrghh! On Dec 4, 2008, at 12:39 AM, David Blanton wrote: I have been required to develop and build with Xcode 2.41 on 10.4.11. In testing on 10.5.5 I get two help menus. Is there something I need to do for Help on 10.5.x ? David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Weird warning
Hi, I am getting some weird warnings that I can't figure out. /Development/Contracting Code/iTask-iPhone/trunk/iTask/Classes/ iTaskAppController.m:103: warning: assignment from distinct Objective- C type /Development/Contracting Code/iTask-iPhone/trunk/iTask/Classes/ iTaskAppController.m:98: warning: 'CalCalendarStore' may not respond to '-taskPredicateWithCalendars:' /Development/Contracting Code/iTask-iPhone/trunk/iTask/Classes/ iTaskAppController.m:98: warning: (Messages without a matching method signature And here is the actual code NSPredicate *taskPredicate = [[CalCalendarStore defaultCalendarStore] taskPredicateWithCalendars:[[CalCalendarStore defaultCalendarStore] calendars]]; taskPredicateWithCalendars: is from the class CalCalendarStore so why is it saying 'CalCalendarStore' may not respond to '- taskPredicateWithCalendars:' Here is the method declaration in the docs, From the class CalCalendarStore: taskPredicateWithCalendars: Returns an NSPredicate object that specifies tasks that belong to the specified calendars. + (NSPredicate *)taskPredicateWithCalendars:(NSArray *)calendars Parameterscalendars An array of CalCalendar objects that the tasks must belong to. Return Value An NSPredicate object that specifies tasks that belong to the specified calendars. Availability • Available in Mac OS X v10.5 and later. Declared InCalCalendarStore.h Can anyone see what I am doing wrong. I just don't get this and of course if I try to debug this, it freezes on that line of code. Thanks in advance. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
Hmmm... Maybe this will help? http://vgable.com/blog/2008/10/29/two-help-menus/ Peace, Love, and Light, /s/ Jon C. Munson II Quoting David Blanton [EMAIL PROTECTED]: I searched the list archives to no avail. I do not believe that I am the only one to see this problem ... the code is vanilla IB menu stuff On Dec 4, 2008, at 10:53 AM, David Blanton wrote: No. I searched Apple Developer. Duh. Will do so now. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Weird warning
On Dec 4, 2008, at 10:22 AM, development2 wrote: Can anyone see what I am doing wrong. I just don't get this and of course if I try to debug this, it freezes on that line of code. You are trying to invoke a class method via an instance of the class. b.bum ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
lid open and close notification
Hi All, In my app needs lid open and close notification.I used ioreg shell call for that (ioreg -n IOPMrootDomain | grep AppleClamshellState | sed 's/^.*=//' ).But when lid close and open it return No. Always the clamshellstate is true.Insomania.kext was loaded before close the lid. Any other way to get this info?. Kindly help me. Thanks In Advance, Sheen ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Weird warning
Duh... OMG. Sorry about the bandwidth waste, what an idiot I am. On Dec 4, 2008, at 11:25 AM, Bill Bumgarner wrote: On Dec 4, 2008, at 10:22 AM, development2 wrote: Can anyone see what I am doing wrong. I just don't get this and of course if I try to debug this, it freezes on that line of code. You are trying to invoke a class method via an instance of the class. b.bum ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Cocoa-dev Digest, Vol 5, Issue 2074
It is *possible* to use NSSocketPort to create a socket which you then communicate with using other techniques, but you can't use NSSocketPort directly to talk to a non-Cocoa app. While the documentation used to imply this, it did not appear to be true then, and the documentation no longer asserts this. If it was ever true, it is unclear when the transition from true to untrue occurred, but it appears that it was untrue at least by Tiger. It does appear to be one of the most enduring myths about the frameworks, perhaps because it seemed so **wrong**. The current documentation states: NSSocketPort is a subclass of NSPort that represents a BSD socket. An NSSocketPort object can be used as an endpoint for distributed object connections or raw messaging It is indeed possible, and easy, to use NSSocketPort to communicate with non-Cocoa applications, in fact one can easily use it to interact with sockets on other platforms. I have used it to communicate with WINSOCK sockets. Message: 10 Date: Thu, 4 Dec 2008 11:43:35 -0500 From: Michael Ash [EMAIL PROTECTED] Subject: Re: Big picture relationships between NSConnection, Yes. NSPort is part of the Distributed Objects system. It's possible to use NSPort on its own, but you must use it to talk to another process which also uses NSPort. It is *possible* to use NSSocketPort to create a socket which you then communicate with using other techniques, but you can't use NSSocketPort directly to talk to a non-Cocoa app. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu Please
The cited reference seems to describe my problem. I am putting up a modal registration in windowDidLoad so I am moving that code to applicationDidFinishLaunching. I'll report my results but I am sure it will resolve the issue. Thanks so much for your patience! On Dec 4, 2008, at 11:25 AM, [EMAIL PROTECTED] wrote: Hmmm... Maybe this will help? http://vgable.com/blog/2008/10/29/two-help-menus/ Peace, Love, and Light, /s/ Jon C. Munson II Quoting David Blanton [EMAIL PROTECTED]: I searched the list archives to no avail. I do not believe that I am the only one to see this problem ... the code is vanilla IB menu stuff On Dec 4, 2008, at 10:53 AM, David Blanton wrote: No. I searched Apple Developer. Duh. Will do so now. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale% 40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Programmatically loading an NSImage via other field
Jon,
I'm not sure I understand the whole problem here, but from your
initial message I put together a simple demo project that will take
the input value from a text field and use that as the path for an
NSImageView. It does it on the fly (e.g. as you type). Here is the
demo project:
http://www.cimgf.com/files/AutoImageLoad.zip
On first run, use the Browse... button to locate an image and select
it. The image will display. Then start to backspace from the end of
the path in the text field and you'll see the image you selected
disappears. Then type back in what you backspaced out and you'll see
it reappear. This is all done with the magic of bindings. The text
field value and the image view's value path are both bound to the same
string. When the string gets updated, so do both of those fields.
You'll see the string that is being used for this is a @property of my
AppDelegate class.
Let me know if you have further questions. I'm a former Windows guy
myself and can probably help you unlearn what you know as I also had
to do. ;-)
Best Regards,
-Matt
On Dec 4, 2008, at 10:03 AM, [EMAIL PROTECTED] wrote:
Namaste!
OK, I've been playing around with this for too long now...
NOTHING gets called when text in a control is set via code or a
mechanism other than strict keyboard/mouse entry by the user from
what I can determine. This, in a word, is not good.
I've set up an observer, delegates, and all that, per previous posts
and only when keys are actually pressed do the delegate methods get
called.
Also, I've noticed that when the record is moved (either next or
previous), there is a buffer time between when code executes and
the interface gets changed.
Thus:
- (IBAction)movePrevious:(id)sender
{
[tblPattern selectPrevious:self];
[btnPrevious setEnabled:[tblPattern canSelectPrevious]];
[self pushPicture];
}
Doesn't work. The Apple dox state the reason the move action is
moved to another process is to give the error mechanism a way to
respond.
As a consequence, nothing changes and the code executes, then the
stuff changes. What happens is the previous image gets loaded as
the current image, despite what the textfield says.
Not good.
For a simple OnChange thing, this is absolutely frustrating (and
has resulted in quite a bit of code).
Bottom line is, it looks like I need some way to see changes that
were made to either the underlying Cell (thinking along the lines of
display changes) or some other route to take this.
I have three scenarios under which the image needs to get pushed:
1. When selected from a file.
2. On Window display - first record is displayed.
3. When records are scrolled (Move Next/Move Previous).
I've solved #1, though I don't like having to manually push the
image (meaning I call the pushPicture routine). 2 3 are still
unsolved at this point.
Any further thoughts??? Anyone else only keep paths to images and
dynamically load from that data? Storing the pictures in the data
structure is not going to happen as they'll take up far too much
space and suck resources.
Thanks for all the help so far!
Peace, Love, and Light,
/s/ Jon C. Munson II
___
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Re: Programmatically loading an NSImage via other field
Great! Thanks!
I'll take a look at at it.
I'm still a Windows guy. Actually, I'm becoming dual-platform. Now
that's a scary thought (but quite marketable if need be). But you are
probably not in the Maryland area, are ya?
Appreciate the help, I'll grab that zip now.
Peace, Love, and Light,
/s/ Jon C. Munson II
Quoting Matt Long [EMAIL PROTECTED]:
Jon,
I'm not sure I understand the whole problem here, but from your initial
message I put together a simple demo project that will take the input
value from a text field and use that as the path for an NSImageView. It
does it on the fly (e.g. as you type). Here is the demo project:
http://www.cimgf.com/files/AutoImageLoad.zip
On first run, use the Browse... button to locate an image and select
it. The image will display. Then start to backspace from the end of the
path in the text field and you'll see the image you selected
disappears. Then type back in what you backspaced out and you'll see it
reappear. This is all done with the magic of bindings. The text field
value and the image view's value path are both bound to the same
string. When the string gets updated, so do both of those fields.
You'll see the string that is being used for this is a @property of my
AppDelegate class.
Let me know if you have further questions. I'm a former Windows guy
myself and can probably help you unlearn what you know as I also had
to do. ;-)
Best Regards,
-Matt
On Dec 4, 2008, at 10:03 AM, [EMAIL PROTECTED] wrote:
Namaste!
OK, I've been playing around with this for too long now...
NOTHING gets called when text in a control is set via code or a
mechanism other than strict keyboard/mouse entry by the user from
what I can determine. This, in a word, is not good.
I've set up an observer, delegates, and all that, per previous
posts and only when keys are actually pressed do the delegate
methods get called.
Also, I've noticed that when the record is moved (either next or
previous), there is a buffer time between when code executes and
the interface gets changed.
Thus:
- (IBAction)movePrevious:(id)sender
{
[tblPattern selectPrevious:self];
[btnPrevious setEnabled:[tblPattern canSelectPrevious]];
[self pushPicture];
}
Doesn't work. The Apple dox state the reason the move action is
moved to another process is to give the error mechanism a way to
respond.
As a consequence, nothing changes and the code executes, then the
stuff changes. What happens is the previous image gets loaded as
the current image, despite what the textfield says.
Not good.
For a simple OnChange thing, this is absolutely frustrating (and
has resulted in quite a bit of code).
Bottom line is, it looks like I need some way to see changes that
were made to either the underlying Cell (thinking along the lines
of display changes) or some other route to take this.
I have three scenarios under which the image needs to get pushed:
1. When selected from a file.
2. On Window display - first record is displayed.
3. When records are scrolled (Move Next/Move Previous).
I've solved #1, though I don't like having to manually push the
image (meaning I call the pushPicture routine). 2 3 are still
unsolved at this point.
Any further thoughts??? Anyone else only keep paths to images and
dynamically load from that data? Storing the pictures in the data
structure is not going to happen as they'll take up far too much
space and suck resources.
Thanks for all the help so far!
Peace, Love, and Light,
/s/ Jon C. Munson II
___
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How to extract individual icons from icns file?
Is there a tool available to extract individual icons from an icns file? In particular the smaller ones. I've tried several tools but none of them work with the 16x16 size. I've seen Linux and Windows tools but no Mac tools. How can that be. Is there a better place for me to ask this question? Thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Help Menu SOLVED
Moving the registration modal dialog to applicationDidFinishLaunching from windowDidLoad solved the problem. Thanks all! On Dec 4, 2008, at 10:53 AM, David Blanton wrote: No. I searched Apple Developer. Duh. Will do so now. On Dec 4, 2008, at 10:38 AM, I. Savant wrote: Have you tried searching this list's archives? This is a FAQ. On Thu, Dec 4, 2008 at 12:36 PM, David Blanton [EMAIL PROTECTED] wrote: On Tiger I get one Help Menu On Leopard I get two Help Menus Has anyone seen this before? Is there some brain dead thing I am missing? Am I brain dead? My boss thinks I am because of this problem. arrghh! On Dec 4, 2008, at 12:39 AM, David Blanton wrote: I have been required to develop and build with Xcode 2.41 on 10.4.11. In testing on 10.5.5 I get two help menus. Is there something I need to do for Help on 10.5.x ? David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/airedale% 40tularosa.net This email sent to [EMAIL PROTECTED] David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/idiotsavant2005% 40gmail.com This email sent to [EMAIL PROTECTED] David Blanton David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
Le 4 déc. 08 à 20:16, David a écrit : Is there a tool available to extract individual icons from an icns file? In particular the smaller ones. I've tried several tools but none of them work with the 16x16 size. I've seen Linux and Windows tools but no Mac tools. How can that be. Is there a better place for me to ask this question? Thanks What about Preview ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Dec 4, 2008, at 12:16 PM, David wrote: Is there a tool available to extract individual icons from an icns file? In particular the smaller ones. I've tried several tools but none of them work with the 16x16 size. I've seen Linux and Windows tools but no Mac tools. How can that be. Is there a better place for me to ask this question? /Developer/Applications/Utilities/Icon Composer.app handles all sizes. I think Preview.app does as well. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSSavePanel mishandling extensions
Le Dec 3, 2008 à 7:11 PM, Kyle Sluder a écrit : On Wed, Dec 3, 2008 at 10:05 PM, Rob Keniger [EMAIL PROTECTED] wrote: Seems like a good idea to me, you should file a bug. To be honest, NSSavePanel and NSOpenPanel should be using UTIs for this by now. I don't know why they're not. They are. Only for NSOpenPanel; for the NSSavePanel it doesn't make as much sense (in other words, what extension would you want to use given a UTI?) corbin___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Programmatically loading an NSImage via other field
Namaste!
Back so soon...
:)
OK, I took a look a what you have and have some questions.
And, well, h...
I'M A DOPE!! :D
No questions!
The reason for that is I was under the extremely mistaken impression
that I couldn't load the ImageView from a simple path via a binding.
I took a look at how you had your ImageView bound and voila! The
answer was staring me straight in the face! ROFL!!!
Can I say OMFG?
Geez...
But I did learn some things along the way so it wasn't a total loss...
I now return you back to your regularly scheduled program...
THANKS!!!
Peace, Love, and Light,
/s/ Jon C. Munson II
p.s. Isn't it always something simple???
Quoting Matt Long [EMAIL PROTECTED]:
Jon,
I'm not sure I understand the whole problem here, but from your initial
message I put together a simple demo project that will take the input
value from a text field and use that as the path for an NSImageView. It
does it on the fly (e.g. as you type). Here is the demo project:
http://www.cimgf.com/files/AutoImageLoad.zip
On first run, use the Browse... button to locate an image and select
it. The image will display. Then start to backspace from the end of the
path in the text field and you'll see the image you selected
disappears. Then type back in what you backspaced out and you'll see it
reappear. This is all done with the magic of bindings. The text field
value and the image view's value path are both bound to the same
string. When the string gets updated, so do both of those fields.
You'll see the string that is being used for this is a @property of my
AppDelegate class.
Let me know if you have further questions. I'm a former Windows guy
myself and can probably help you unlearn what you know as I also had
to do. ;-)
Best Regards,
-Matt
On Dec 4, 2008, at 10:03 AM, [EMAIL PROTECTED] wrote:
Namaste!
OK, I've been playing around with this for too long now...
NOTHING gets called when text in a control is set via code or a
mechanism other than strict keyboard/mouse entry by the user from
what I can determine. This, in a word, is not good.
I've set up an observer, delegates, and all that, per previous
posts and only when keys are actually pressed do the delegate
methods get called.
Also, I've noticed that when the record is moved (either next or
previous), there is a buffer time between when code executes and
the interface gets changed.
Thus:
- (IBAction)movePrevious:(id)sender
{
[tblPattern selectPrevious:self];
[btnPrevious setEnabled:[tblPattern canSelectPrevious]];
[self pushPicture];
}
Doesn't work. The Apple dox state the reason the move action is
moved to another process is to give the error mechanism a way to
respond.
As a consequence, nothing changes and the code executes, then the
stuff changes. What happens is the previous image gets loaded as
the current image, despite what the textfield says.
Not good.
For a simple OnChange thing, this is absolutely frustrating (and
has resulted in quite a bit of code).
Bottom line is, it looks like I need some way to see changes that
were made to either the underlying Cell (thinking along the lines
of display changes) or some other route to take this.
I have three scenarios under which the image needs to get pushed:
1. When selected from a file.
2. On Window display - first record is displayed.
3. When records are scrolled (Move Next/Move Previous).
I've solved #1, though I don't like having to manually push the
image (meaning I call the pushPicture routine). 2 3 are still
unsolved at this point.
Any further thoughts??? Anyone else only keep paths to images and
dynamically load from that data? Storing the pictures in the data
structure is not going to happen as they'll take up far too much
space and suck resources.
Thanks for all the help so far!
Peace, Love, and Light,
/s/ Jon C. Munson II
___
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Re: How to extract individual icons from icns file?
where is Icon Composer tool in /Developer/Applications/Utilities (Leopard). Tiger had Icon Composer and icns Browser tools in the same place Regards, Misha On Dec 4, 2008, at 11:16 AM, David wrote: Is there a tool available to extract individual icons from an icns file? In particular the smaller ones. I've tried several tools but none of them work with the 16x16 size. I've seen Linux and Windows tools but no Mac tools. How can that be. Is there a better place for me to ask this question? Thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/gonodanov%40apple.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
Good old Iconographer (Carbon). Wonderful little app, it's now free. http://www.mscape.com/ Love, Jens On Dec 4, 2008, at 20:16, David wrote: Is there a tool available to extract individual icons from an icns file? In particular the smaller ones. I've tried several tools but none of them work with the 16x16 size. I've seen Linux and Windows tools but no Mac tools. How can that be. Is there a better place for me to ask this question? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSSavePanel mishandling extensions
On Thu, Dec 4, 2008 at 2:36 PM, Corbin Dunn [EMAIL PROTECTED] wrote: They are. Only for NSOpenPanel; for the NSSavePanel it doesn't make as much sense (in other words, what extension would you want to use given a UTI?) If the same UTI maps to multiple extensions, then it shouldn't matter what extension is used on the filename. Different kinds of files should have different UTIs. If disambiguation is necessary, the Show Extension checkbox can be used to override the automatic mapping. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSSavePanel mishandling extensions
I should probably make crystal clear that I am describing an enhancement to NSSavePanel's behavior that I'd like to see, not how it currently works or is documented to work. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: lid open and close notification
On 4 Dec 2008, at 18:29:26, sheen mac wrote: Hi All, In my app needs lid open and close notification.I used ioreg shell call for that (ioreg -n IOPMrootDomain | grep AppleClamshellState | sed 's/^.*=//' ).But when lid close and open it return No. Always the clamshellstate is true.Insomania.kext was loaded before close the lid. Any other way to get this info?. Kindly help me. Thanks In Advance, Sheen I'm not familiar with this, but... how would you know the lid is closed? Wouldn't the computer be asleep? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Dec 4, 2008, at 2:22 PM, Misha Gonodanov wrote: where is Icon Composer tool in /Developer/Applications/Utilities (Leopard). Tiger had Icon Composer and icns Browser tools in the same place Are you asking where Icon Composer is? What happens if you type icon composer into Spotlight? --Andy Regards, Misha On Dec 4, 2008, at 11:16 AM, David wrote: Is there a tool available to extract individual icons from an icns file? In particular the smaller ones. I've tried several tools but none of them work with the 16x16 size. I've seen Linux and Windows tools but no Mac tools. How can that be. Is there a better place for me to ask this question? Thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/gonodanov %40apple.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/aglee%40mac.com This email sent to [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Thu, Dec 4, 2008 at 3:28 PM, Andy Lee [EMAIL PROTECTED] wrote: Are you asking where Icon Composer is? What happens if you type icon composer into Spotlight? As I recall, the /Developer folder isn't automatically indexed by Spotlight. At least it didn't used to be. I had to manually ask it to index. Has that changed? Anyway, there are various problems with trying to save images out of Icon Composer and Preview. Try finding the standard folder icon and extracting a clean image from it with either of those apps. Go on ... I'll wait ... :-) Artifacts and ugliness. That's what you get. A solution the OP might try is to write a quick app using NSImage to extract the image at the desired size. This shouldn't take an intermediate Cocoa developer more than twenty minutes, depending on how involved you get with options. -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: lid open and close notification
On Dec 4, 2008, at 1:11 PM, Benjamin Dobson wrote: I'm not familiar with this, but... how would you know the lid is closed? Wouldn't the computer be asleep? There are several situations in Mac OS X where the clamshell can be closed and the computer will remain wide awake, or the computer will remain asleep when the clamshell is opened. For example, if you have an external monitor plugged in and the built-in display turned off, then opening and closing the clamshell does not put the computer to sleep. Nick Zitzmann http://www.chronosnet.com/ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSSavePanel mishandling extensions
Le Dec 4, 2008 à 12:02 PM, Kyle Sluder a écrit : On Thu, Dec 4, 2008 at 2:36 PM, Corbin Dunn [EMAIL PROTECTED] wrote: They are. Only for NSOpenPanel; for the NSSavePanel it doesn't make as much sense (in other words, what extension would you want to use given a UTI?) If the same UTI maps to multiple extensions, then it shouldn't matter what extension is used on the filename. Different kinds of files should have different UTIs. If disambiguation is necessary, the Show Extension checkbox can be used to override the automatic mapping. We could do this, and I have thought about it..please log a bug request: bugreporter.apple.com, and feel free to send me the radar #. thanks! corbin___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Dec 4, 2008, at 3:33 PM, I. Savant wrote: On Thu, Dec 4, 2008 at 3:28 PM, Andy Lee [EMAIL PROTECTED] wrote: Are you asking where Icon Composer is? What happens if you type icon composer into Spotlight? As I recall, the /Developer folder isn't automatically indexed by Spotlight. At least it didn't used to be. I had to manually ask it to index. Has that changed? I remember something to that effect too, but Spotlight found Icon Composer, and I have a fresh OS/DevTools installation. It also found a bunch of other files I just tried. But my home directory is copied from another computer; maybe it contains an index /Developer pref that I don't remember setting, or maybe things did indeed change. --Andy ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Animation proxies and Python
Hello list,
I've been unsuccessfully trying to use an animation proxy for an
NSWindow instance using Python:
For example:
def fadeOut(self, window):
window.animator().setAlphaValue_(0.0)
causes my application to crash.
Bypassing the proxy, however works:
def fadeOut(self, window):
window.setAlphaValue_(0.0)
Interestingly, if I invoke the setAlphaValue method on the proxy using
the performSelector method, it works:
def fadeOut(self, window):
windowProxy = window.animator()
windowProxy.performSelector_('setAlphaValue:')
The above code will cause the window to animate a fade out to blank,
which is expected because I'm not passing in any parameters and it is
assuming an alpha value of nil or 0. (Note that I am aware of
performSelector_withObject_, but it did not work as expected, probably
because the input parameter is a double and not an NSObject).
Question: Is all of this expected behaviour? If so, what is the best
practice for calling methods on proxy objects like this in Python?
Thanks very much in advance!
Regards,
Mani
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Re: How to extract individual icons from icns file?
On Thu, Dec 4, 2008 at 3:33 PM, I. Savant [EMAIL PROTECTED] wrote: Anyway, there are various problems with trying to save images out of Icon Composer and Preview. Try finding the standard folder icon and extracting a clean image from it with either of those apps. Go on ... I'll wait ... :-) Is this a trick question of some kind? Took me about 60 seconds to find the icns file, and 5 seconds to open it with Preview: $ open /System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/GenericFolderIcon.icns Then pick the size I want, cmd-C, cmd-N, cmd-S, and save it as the type I want. Artifacts and ugliness. That's what you get. Might be what you get, certainly isn't what I got. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Thu, Dec 4, 2008 at 3:54 PM, Michael Ash [EMAIL PROTECTED] wrote: Is this a trick question of some kind? Sort of ... Artifacts and ugliness. That's what you get. Might be what you get, certainly isn't what I got. Great. Now open the newly-created file in Photoshop (as if you were going to do something with it such as creating a branded folder or something similar). :-) -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Cocoa-dev Digest, Vol 5, Issue 2074
On Thu, Dec 4, 2008 at 1:40 PM, Kirk Kerekes [EMAIL PROTECTED] wrote: It is *possible* to use NSSocketPort to create a socket which you then communicate with using other techniques, but you can't use NSSocketPort directly to talk to a non-Cocoa app. While the documentation used to imply this, it did not appear to be true then, and the documentation no longer asserts this. If it was ever true, it is unclear when the transition from true to untrue occurred, but it appears that it was untrue at least by Tiger. It does appear to be one of the most enduring myths about the frameworks, perhaps because it seemed so **wrong**. The current documentation states: NSSocketPort is a subclass of NSPort that represents a BSD socket. An NSSocketPort object can be used as an endpoint for distributed object connections or raw messaging It is indeed possible, and easy, to use NSSocketPort to communicate with non-Cocoa applications, in fact one can easily use it to interact with sockets on other platforms. I have used it to communicate with WINSOCK sockets. But raw messaging is not the same as writing raw bytes to a TCP stream. All that means is that you can use the standard NSPort API as well as using it to set up an NSConnection. You say that you've used it to talk to sockets on other platforms. How? The API is completely non-suitable for it. It doesn't give you a way to simply read or write streams. Instead it deals with arrays of messages. This is going to require some sort of custom framing protocol which means that it's not going to be able to talk to anything that doesn't also use that custom framing protocol. How do you get around that limitation? Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Thu, Dec 4, 2008 at 3:58 PM, I. Savant [EMAIL PROTECTED] wrote: Might be what you get, certainly isn't what I got. Great. Now open the newly-created file in Photoshop (as if you were going to do something with it such as creating a branded folder or something similar). :-) After Mike contacted me off-list to let me know he didn't have Photoshop but Acorn and others show the image perfectly well, I tried opening in Pixelmator and it appears just fine there as well. So ... this appears to be nothing more than a Photoshop bug! :-) Sorry for the noise. Most of my graphics work is done in Photoshop, so I never noticed the artifacts only appeared there. Well there you have it, David (OP), copy and paste from the desired file from Icon Composer or Preview and it should work fine ... as long as you don't intend to open the result in Photoshop. :-D -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On 4 Dec 2008, at 20:58:29, I. Savant wrote: Great. Now open the newly-created file in Photoshop (as if you were going to do something with it such as creating a branded folder or something similar). :-) Yes, I've noticed how bad Photoshop is with TIFFs. In Preview, File » Save As » Pretty much anything except TIFF, such as PNG, then open it in Photoshop. It's fine.___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Dec 4, 2008, at 2:08 PM, I. Savant wrote: On Thu, Dec 4, 2008 at 3:58 PM, I. Savant [EMAIL PROTECTED] wrote: Might be what you get, certainly isn't what I got. Great. Now open the newly-created file in Photoshop (as if you were going to do something with it such as creating a branded folder or something similar). :-) After Mike contacted me off-list to let me know he didn't have Photoshop but Acorn and others show the image perfectly well, I tried opening in Pixelmator and it appears just fine there as well. So ... this appears to be nothing more than a Photoshop bug! :-) Sorry for the noise. Most of my graphics work is done in Photoshop, so I never noticed the artifacts only appeared there. Well there you have it, David (OP), copy and paste from the desired file from Icon Composer or Preview and it should work fine ... as long as you don't intend to open the result in Photoshop. :-D To throw another monkey wrench into your conclusion, I opened it in PS CS3, and it looked just fine. I did save from Preview as a PNG, dunno if format (or version) makes a difference. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Thu, Dec 4, 2008 at 4:12 PM, Randall Meadows [EMAIL PROTECTED] wrote: To throw another monkey wrench into your conclusion, I opened it in PS CS3, and it looked just fine. I did save from Preview as a PNG, dunno if format (or version) makes a difference. Further experimentation at Mike Ash's urging reveals that it is only with TIFFs with alpha. I'll go out on a limb and theorize that it's specifically TIFFs with alpha created by Mac OS X's machinery that has this affect, though that theory is untested. Yes, it works just fine with PNGs. -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: self = [super init];
On Thu, Dec 4, 2008 at 12:53 AM, Stephen J. Butler [EMAIL PROTECTED] wrote: On Thu, Dec 4, 2008 at 2:32 AM, EVS [EMAIL PROTECTED] wrote: Thank you, I suppose the reason I find it confusing is because self is a pointer to the current object. If self were to release self ( the current object ), while it is being used, I would have guessed that would cause problems. You can call [self release] as long as you don't access (directly or indirectly) self for the rest of the method. So if you keep from touching instance variables or calling methods off self then things will be fine. And if your caller knows somehow (like checking return values, in the case of init) to not reference the released self then everything is kosher. In fact, the same is true in C++ with this, only a little more pathologically so. You're allowed to call non-virtual member functions off a bad this pointer because No, you're not. It is possible that many compilers will let you get away with it, but it doesn't mean that you're allowed to do it. those functions are statically bound. Causes confusion in every intro C++ course because students can't figure out why their program is crashing in the middle of a method call (when they finally access an instance variable off the bad this pointer). I even saw a horrible design pattern, probably on The Daily WTF, where the programmer was doing singletons via something like: ((MyClass*)NULL)-getInstance(); Totally pathological, but nothing technically wrong with it as long as you're careful. No, according to the standard, that is undefined behavior. So not only pathological, it is also technically wrong :). -- Clark S. Cox III [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
Le 4 déc. 08 à 22:18, I. Savant a écrit : On Thu, Dec 4, 2008 at 4:12 PM, Randall Meadows [EMAIL PROTECTED] pc.com wrote: To throw another monkey wrench into your conclusion, I opened it in PS CS3, and it looked just fine. I did save from Preview as a PNG, dunno if format (or version) makes a difference. Further experimentation at Mike Ash's urging reveals that it is only with TIFFs with alpha. I'll go out on a limb and theorize that it's specifically TIFFs with alpha created by Mac OS X's machinery that has this affect, though that theory is untested. Yes, it works just fine with PNGs. This is a very old and well known issus. http://www.wodeveloper.com/omniLists/macosx-dev/2002/September/msg00251.html ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to extract individual icons from icns file?
On Thu, Dec 4, 2008 at 4:51 PM, Jean-Daniel Dupas [EMAIL PROTECTED] wrote: This is a very old and well known issus. http://www.wodeveloper.com/omniLists/macosx-dev/2002/September/msg00251.html Oddly, I tried the very thing joar suggests in the post you reference (running the image through tiffutil using -cat) just as I was testing this today. Didn't fix anything. Same problem. -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
NSArrays and tableView delegates
Hi folks,
I'm looking for advice on usage of arrays in tableviews.
I have a subclassed NSWindowController. In this class I have a method
that extracts data from my core data model and formulates an array of
dictionaries. Also in this class I have the tableview datasource
methods. The datasource methods use the standard KVC column identifier
thingies to populate the table. I'm having memory leaks and I'm sure
its because of the way I'm making the array available to teh data
source methods.
My interface file looks like this;
@interface MLimportController : NSWindowController {
IBOutlet NSTableView*transactionTable;
IBOutlet NSArrayController *accountsController;
NSMutableArray *importedTransactions;
NSManagedObject *selectedAccount;
NSNumber *selectedTransferIndex;
}
- (IBAction) recordTransactions:(id)sender;
- (IBAction) deleteSelectedTransactions:(id)sender;
- (void) setAccountSortDescriptors: (NSArray *) descriptors;
- (NSArray *) accountSortDescriptors;
- (void) importFile:(NSString *)aFile;
//delegates
- (int)numberOfRowsInTableView:(NSTableView *)tableView;
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:
(NSTableColumn *)tableColumn row:(int)row;
- (void)tableView:(NSTableView *)tableView setObjectValue:(id)newValue
forTableColumn:(NSTableColumn *)tableColumn row:(int)row;
@end
In the importFile: method is where I build they array
importedTransactions. However, as it will autorelease I [retain] it so
its still hanging around for the tableView methods to access it. Is
this the correct way of doing this? Or should I be declaring the
NSArray as a @property and using getters/setters to use it?
My memory leak is resulting in importedTransactions always having a
retainCount of 1, meaning the importController class can never be
deallocated by my NSDocument, meaning the documentController can never
close the document properly. I'm sure I'm doing this an ugly way.
(Leopard 10.5.5 with GC on)
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Re: custom view binding to NSTreeController
On 05/12/2008, at 1:29 AM, Matthew Johnson wrote: I agree it's a shame. There are plenty of examples for simpler binding scenarios, but none I have found for custom views binding to NSTreeController. I really appreciate your sample will do something similar if I don't find a better way. You're right that it will be fast for smaller data sets. The problem is that it should be a constant time operation and your code is much more expensive than that. Depending on the implementation of removeItemsInArray your code is at least O(n) and it is likely to be O(n2). That will not scale to large data sets very well. I agree. I had a look at a class-dump of AppKit and it doesn't look like there's much in there that would help in this. There really needs to be a way for NSTreeController's arrangedObjects KVO notifications to include the NSTreeNodes that are being added/removed. There seems no reason why they couldn't be included in the change dictionary. I think I'll file a bug against it. -- Rob Keniger ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: custom view binding to NSTreeController
On Dec 5, 2008, at 8:23 AM, Rob Keniger wrote: On 05/12/2008, at 1:29 AM, Matthew Johnson wrote: I agree it's a shame. There are plenty of examples for simpler binding scenarios, but none I have found for custom views binding to NSTreeController. I really appreciate your sample will do something similar if I don't find a better way. You're right that it will be fast for smaller data sets. The problem is that it should be a constant time operation and your code is much more expensive than that. Depending on the implementation of removeItemsInArray your code is at least O(n) and it is likely to be O(n2). That will not scale to large data sets very well. I agree. I had a look at a class-dump of AppKit and it doesn't look like there's much in there that would help in this. There really needs to be a way for NSTreeController's arrangedObjects KVO notifications to include the NSTreeNodes that are being added/ removed. There seems no reason why they couldn't be included in the change dictionary. I think I'll file a bug against it. Sounds good. Let me know what the radar number is and I'll file one also and mention your radar. Thanks, Matthew ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSArrays and tableView delegates
On Dec 3, 2008, at 10:05 PM, Steven Hamilton wrote:
Hi folks,
Hi!
I have a subclassed NSWindowController. In this class I have a
method that extracts data from my core data model and formulates an
array of dictionaries. Also in this class I have the tableview
datasource methods. The datasource methods use the standard KVC
column identifier thingies to populate the table. I'm having memory
leaks and I'm sure its because of the way I'm making the array
available to teh data source methods.
My interface file looks like this;
@interface MLimportController : NSWindowController {
IBOutlet NSTableView*transactionTable;
IBOutlet NSArrayController *accountsController;
NSMutableArray *importedTransactions;
NSManagedObject *selectedAccount;
NSNumber *selectedTransferIndex;
}
- (IBAction) recordTransactions:(id)sender;
- (IBAction) deleteSelectedTransactions:(id)sender;
- (void) setAccountSortDescriptors: (NSArray *) descriptors;
- (NSArray *) accountSortDescriptors;
- (void) importFile:(NSString *)aFile;
//delegates
- (int)numberOfRowsInTableView:(NSTableView *)tableView;
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:
(NSTableColumn *)tableColumn row:(int)row;
- (void)tableView:(NSTableView *)tableView setObjectValue:
(id)newValue forTableColumn:(NSTableColumn *)tableColumn row:(int)row;
@end
In the importFile: method is where I build they array
importedTransactions. However, as it will autorelease I [retain] it
so its still hanging around for the tableView methods to access it.
Is this the correct way of doing this? Or should I be declaring the
NSArray as a @property and using getters/setters to use it?
That sounds fine as long as you are releasing it in your -dealloc
method.
My memory leak is resulting in importedTransactions always having a
retainCount of 1, meaning the importController class can never be
deallocated by my NSDocument, meaning the documentController can
never close the document properly. I'm sure I'm doing this an ugly
way.
The retainCount of the importedTransactions will not affect whether
its containing class is deallocated unless one or more items in that
array have retained the importController class also. If they have then
you have a circular reference that you'd have to break at some point
external to -dealloc.
(Leopard 10.5.5 with GC on)
If you're running this program under GC then none of what you said
makes sense anyway since retain/release/autorelease are all no-ops
under GC and -dealloc is never called there.
What tool told you that you were having leaks? What information did it
give you?
Ashley
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indexOfObjectIdenticalTo: problem with NSArrayController
Hi all. Since it is good programming to not access an array's content through its controller when in the model I'm trying to find a way to get to the same object selected in the user interface (i.e. the array controller). In my view I have the array content sorted by binding it to a sort descriptor. Thus, the indices of the array and the content of the array shown in the view differs. Now, when a certain object is selected in the view I want to do something to this object by accessing it through the original array. My first, perhaps foolish, guess would be to use indexOfObjectIdenticalTo: or indexOfObject: like this: int indexOfObject = [theOriginalArray indexOfObjectIdenticalTo: [theArrayController selection]]; but this does not work. Looking in the reference I see that [theArrayController selection] will return a proxy object. Is this the reason my code won't work? How would you solve this? /wamund ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Big picture relationships between NSConnection, NSInputStream, NSOutputStream etc
OK. After reading the docs on NSStream, here's what I came up with.
- (BOOL) openStreamsWithMode:(MySQLConnectMode) inMode
{
[NSStream getStreamsToHost: host port: port inputStream: inStream
outputStream: outStream];
if ((inStream != nil) (outStream != nil))
{
connectMode = inMode;
[inStream retain];
[outStream retain];
[inStream setDelegate: self];
[outStream setDelegate: self];
[inStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:
NSDefaultRunLoopMode];
[outStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:
NSDefaultRunLoopMode];
[inStream open];
[outStream open];
NSLog(@inputStream: %@, outputStream: %@, inStream,
outStream);
return YES;
}
else
NSLog(@Failed to open inputStream: %@, outputStream: %@, inStream,
outStream);
return NO;
}
- (void) stream:(NSStream *) inSender
handleEvent:(NSStreamEvent) inEvent
{
NSLog(@Entered: stream:handleEvent: with sender: %@, inSender);
if (inSender == inStream)
{
switch (inEvent)
{
caseNSStreamEventHasBytesAvailable:
NSLog(@NSStreamEventHasBytesAvailable);
[self readInputStreamData];
break;
caseNSStreamEventErrorOccurred:
NSLog(@NSStreamEventErrorOccurred:
%@, [inStream streamError]);
break;
caseNSStreamEventEndEncountered:
NSLog(@NSStreamEventEndEncountered);
[self processStreamData];
break;
}
}
}
I tried it out and got the following printout to the console
inputStream: NSCFInputStream: 0x13d170, outputStream:
NSCFOutputStream: 0x13d1e0
connection: MySQLConnection: 0x824800
Entered: stream:handleEvent: with sender: NSCFInputStream: 0x13d170
NSStreamEventErrorOccurred: Error Domain=NSPOSIXErrorDomain Code=61
Operation could not be completed. Connection refused
Entered: stream:handleEvent: with sender: NSCFOutputStream:
0x13d1e0
Which seems to make sense because MySQL requires a handshake and
NSSocket doesn't know how to respond to that handshake. To perform the
handshake, it seems I need to descend into BSD sockets.
Looking at the Picture browser example project shows how to set up a
socket for listening, but not how to set one up to send the initial
connect request to a remote process
int fdForListening;
struct sockaddr_in serverAddress;
socklen_t namelen =
sizeof(serverAddress);
// In order to use NSFileHandle's acceptConnectionInBackgroundAndNotify
// method, we need to create a file descriptor that is itself a socket,
// bind that socket, and then set it up for listening. At this point,
// it's ready to be handed off to acceptConnectionInBackgroundAndNotify.
if((fdForListening = socket(AF_INET, SOCK_STREAM, 0)) 0)
{
memset(serverAddress, 0, sizeof(serverAddress));
serverAddress.sin_family= AF_INET;
serverAddress.sin_addr.s_addr = htonl(INADDR_ANY);
serverAddress.sin_port = 0; // allows the kernel to choose the port
for us.
if(bind(fdForListening, (struct sockaddr *) serverAddress,
sizeof(serverAddress)) 0)
{
close(fdForListening);
return;
}
// Find out what port number was chosen for us.
if(getsockname(fdForListening, (struct sockaddr *) serverAddress,
namelen) 0)
{
close(fdForListening);
return;
}
chosenPort = ntohs(serverAddress.sin_port);
if(listen(fdForListening, 1) == 0)
{
handshakeSocket = [[NSFileHandle alloc] initWithFileDescriptor:
fdForListening closeOnDealloc: YES];
}
}
I gather from that, I need to set the following serverAddress fields
differently but after looking at in.h none of the INADDR_xxx modes
jump out at me
serverAddress.sin_family= AF_INET;
serverAddress.sin_addr.s_addr = htonl(INADDR_ANY);
serverAddress.sin_port = 0; // allows the kernel to choose the port
for us.
Which should I use IN_CLASSA_HOST, IN_CLASSB_HOST, other?
How does one set up a file descriptor for an initial connect request
to a remote process?
Re: indexOfObjectIdenticalTo: problem with NSArrayController
On Dec 4, 2008, at 5:46 PM, Mikael Wämundson wrote: Hi all. Since it is good programming to not access an array's content through its controller when in the model I'm trying to find a way to get to the same object selected in the user interface (i.e. the array controller). In my view I have the array content sorted by binding it to a sort descriptor. Thus, the indices of the array and the content of the array shown in the view differs. Now, when a certain object is selected in the view I want to do something to this object by accessing it through the original array. My first, perhaps foolish, guess would be to use indexOfObjectIdenticalTo: or indexOfObject: like this: int indexOfObject = [theOriginalArray indexOfObjectIdenticalTo: [theArrayController selection]]; but this does not work. Looking in the reference I see that [theArrayController selection] will return a proxy object. Is this the reason my code won't work? Ask the array controller for its' selectedObjects. This returns an array of the selected objects and is not a proxy object like selection. Iterate over that array to get the indexes you're interested in from your original array. Ashley___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSSocketPort == BSD Socket
-[NSSocketPort socket] returns a file descriptor. Write to it. Init an NSFileHandle with it. (-[NSFileHandle initWithFileDescriptor:]) It's all just sockets/files/descriptors. But raw messaging is not the same as writing raw bytes to a TCP stream. All that means is that you can use the standard NSPort API as well as using it to set up an NSConnection. You say that you've used it to talk to sockets on other platforms. How? The API is completely non-suitable for it. It doesn't give you a way to simply read or write streams. Instead it deals with arrays of messages. This is going to require some sort of custom framing protocol which means that it's not going to be able to talk to anything that doesn't also use that custom framing protocol. How do you get around that limitation? Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
