Re: Open panel is permanently dead?
On Feb 19, 2010, at 6:17 AM, Tom Davie wrote:
Hi,
I'm having some problems with an open panel. I display the panel, allow the
user to chose and image, and then do some work, which involves showing a
sheet while the work is done. This all works wonderfully, until the user
clicks the set texture button again, and my method is called again. The
second time, for some reason, the open panel is never displayed.
Can anyone tell what's going on here? I've added code below:
SWAG here: check the value of isReleasedWhenClosed. If it's YES, that
would explain the panel
being dead after the first time.
Consider using orderOut to dismiss the panel instead of close.
Cheers,
. . . . . . . .Henry
- (IBAction)setTexture:(id)sender{
NSOpenPanel
http://developer.apple.com/documentation/Cocoa/Reference/ApplicationKit/ObjC_classic/Classes/NSOpenPanel.html
*panel = [NSOpenPanel
http://developer.apple.com/documentation/Cocoa/Reference/ApplicationKit/ObjC_classic/Classes/NSOpenPanel.html
openPanel];
[panel setCanChooseFiles:YES];
[panel setCanChooseDirectories:NO];
[panel setResolvesAliases:YES];
[panel setAllowsMultipleSelection:NO];
[panel setTitle:@Select Texture];
[panel setAllowedFileTypes:[NSArray
http://developer.apple.com/documentation/Cocoa/Reference/Foundation/ObjC_classic/Classes/NSArray.html
arrayWithObject:@png]];
[panel beginSheetModalForWindow:[delegate windowForSheet]
completionHandler:^(NSInteger result)
{
if (result == NSFileHandlingPanelOKButton)
{
NSURL
http://developer.apple.com/documentation/Cocoa/Reference/Foundation/ObjC_classic/Classes/NSURL.html
*selection = [[panel URLs] objectAtIndex:0];
NSImage
http://developer.apple.com/documentation/Cocoa/Reference/ApplicationKit/ObjC_classic/Classes/NSImage.html
*image = [[[NSImage
http://developer.apple.com/documentation/Cocoa/Reference/ApplicationKit/ObjC_classic/Classes/NSImage.html
alloc] initWithContentsOfURL:selection] autorelease];
[self.item addObserver:self
forKeyPath:@textureIsCompressed
options:NSKeyValueObservingOptionNew context:nil];
self.item.texture = image;
[panel close];
[NSApp beginSheet:compressingTexturePanel
modalForWindow:[delegate windowForSheet]
modalDelegate:self
didEndSelector:@selector(compressionSheetDidEnd:)
contextInfo:nil];
[compressingProgress startAnimation:self];
}
}];}
Thanks
Tom Davie
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Re: Puppeting/Automating one application from another?
On Feb 16, 2010, at 6:31 PM, James Trankelson wrote: Hi, I'm trying to figure out the general feasibility of the following task. Imagine I have two separate applications, running side by side. Is it possible to take all of the mouse/keyboard inputs that are going into one of these applications, and send them to the other in a way that would allow me to 'control' the other app from the events generated in the first? I took a few steps to begin creating an infrastructure to support this, but then became concerned that I'd soon have issues with focusing, like if pressing buttons in the 'puppeted' application would take away the focus in the application sending the events. Does anyone know if something like this is possible? If so, does anyone know of any applications that do this, or have any pointers that could help me with this? The first thought off the top of my head was NSDistributedNotificationCenter. Should be possible to flange up a mini-application to test the idea . . . Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: How to get small UISegmentedControl?
On Feb 13, 2010, at 11:39 AM, Laurent Daudelin wrote: Is there anyway to have smaller segmented controls besides the large ones available in IB? I'm talking the size of the one in Settings-General for Location Services. Any idea? Using Interface Builder's Attributes Inspector, set the style to Bar. There's a pull-down named Style right at the top of the inspector, with choices of Plain, Bordered, or Bar . . . If you're doing it programmatically, do a [yourControl setSegmentedControlStyle: UISegmentedControlStyleBar]; Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Crash while drawing cell in NSOutlineView
On Feb 13, 2010, at 7:57 PM, Trygve Inda wrote: Trygve Inda (cocoa...@xericdesign.com) on 2010-02-14 22:13 said: In code based largely on Apple's SourceView, I am drawing by IconAndTextCell and getting a crash... Anyone seen this and know what it might be? I have added code to draw a badge which I am updating frequently - if I only call it once, it works ok... But if it is called rapidly I get: Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 libobjc.A.dylib 0x7fff818ab120 objc_msgSend + 44 Have you read this? http://www.sealiesoftware.com/blog/archive/2008/09/22/ objc_explain_So_you_crashed_in_objc_msgSend.html Sean -- It is difficult to get a man to understand something when his salary depends upon him not understanding it. - Upton Sinclair Most excellent! Thank you for this reference... As obviously I had not come across it. Maybe I will get to do some non-work this Saturday night. One bit caught my eye immediately: Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 libobjc.A.dylib 0x7fff818ab120 objc_msgSend + 44 1 com.apple.CoreFoundation 0x7fff867ac246 _CFAutoreleasePoolPop + 230 2 com.apple.AppKit 0x7fff81a69d3d -[NSTableView drawRow:clipRect:] + 1343 3 com.apple.AppKit 0x7fff81a695cb -[NSTableView Possibly something got released that should not have been released ? Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Connected Objects being allocated
On Feb 12, 2010, at 1:31 PM, Donald Klett wrote:
Once again, I am not understanding some aspect of Objective C and/or Cocoa.
I created a simple class that contains two NSTextField objects. I used IB to
connect the Controller object with the two text fields. The code follows.
This example runs correctly and does copy the value from one text field to
the other.
#import Cocoa/Cocoa.h
@interface Controller : NSObject {
IBOutlet NSTextField* textField;
IBOutlet NSTextField* copyField;
}
- (IBAction) buttonTarget: (id) sender;
@end
#import Controller.h
@implementation Controller
- (IBAction) buttonTarget: (id) sender {
int textValue;
textValue = [textField intValue];
[copyField setIntegerValue:textValue];
}
@end
Okay, all is groovy so far.What you've left unstated in the explanation
above is that the
two text fields must have been allocated *somewhere*.I can make a SWAG that
you
dragged a couple of text fields from IB's palette onto the (content view) of
the main window
that shows up when you open MainMenu.xib, yes ?
If that is the case, you have two (instantiated and correctly * initialised by
IB) text fields that
you can connect to from your (presumably also instantiated and initialised by
IB) Controller
object.
Now if I extend this to two objects (Controller and View), the resulting code
does not execute correctly. Again, I used IB to connect the View object to
the two text fields. Using the debugger I find that the two NSTextField
objects have not been allocated (both have nil values). The code follows:
#import Cocoa/Cocoa.h
#import View.h
Minor detail here.Use @class forward references in .h files instead
of importing the class's .h file in your Controller's .h file.In other
words,
delete the#import View.h line and add a @class View;line . . .
This tells the compiler you'll be referencing the View class in your .h file
with an unspoken promise you will include the View.h file in your
Controller's .m
file . . .
@interface Controller : NSObject {
View* view;
}
- (IBAction) buttonTarget: (id) sender;
@end
#import Controller.h
#import View.h
@implementation Controller
- (id) init {
if (self = [super init]) {
view = [[View alloc] init];
}
return self;
}
Below, you have View as a sub-class of NSObject.Why?
If View is supposed to be a sub-class of NSView, your [[View alloc] init]
above needs to be [[View alloc] initWithFrame: . . .]
- (IBAction) buttonTarget: (id) sender {
[view copyFieldValue];
}
@end
#import Cocoa/Cocoa.h
@interface View : NSObject {
IBOutlet NSTextField* textField;
IBOutlet NSTextField* copyField;
}
- (void) copyFieldValue;
@end
Based on this declaration, do you have a View object instantiated in your
MainMenu.xib,
and did you then connect the two outlets to the two text fields from that
already instantiated object?
If so, after then instantiating a View object in your Controller, your
Controller is now talking to
the wrong View object and the one from the xib is being ignored . . .
#import View.h
@implementation View
- (void) copyFieldValue {
[copyField setIntegerValue:[textField intValue]];
}
@end
I have no idea what I am doing wrong. Any help would be most appreciated.
Thanks in advance.
I hope this helps a little. One of the more common beginner mistakes
is to instantiate an object in the xib, and then instantiate a completely
new version in code . . .
And as (I think) someone already pointed out, if you have a class whose
name is View, anybody reading your code superficially would expect it to
*be* something that relates to existing NSView or UIView classes and have
View-like behaviour . . .
A useful exercise to do is to look at your xib objects and draw a picture of
the objects and their connections --- that essentially defines your 'Application
Architecture', and a picture can quickly show up anomalies in the object
graph --- either orphan objects as I suspect in the case, or objects that aren't
really doing anything useful . . .
Cheers,
. . . . . . . .Henry
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Re: UINavigationController inside a TabBarController
On Feb 12, 2010, at 8:34 PM, Laurent Daudelin wrote: I'm not sure what I'm missing but I know it must be big. I started the design of a TabBar-style app and now, I want one of the view to be a navigation one. I did drag a UINavigationController to my xib, put it inside the TabBarView and put my tableview under the navigation controller. When I open the window in IB, I can see my tableview inside the nav controller, in the first tab item but when I compile and go, only the navigation view shows up when I select the tab item. I've been banging my head, trying to find what connection or method I missed, I can't find it. Your Navigation Controller must be one of the controllers in the Tab Bar Controller's array of View Controllers. Then, the Navigation Controller's Root View Controller must be the Table View Controller. Is that the structure you have? Possibly there is either a class identity that has not been correctly set, or, there might be a Nib Name that is not correctly set.This stuff is notoriously easy to get wrong . . . In IB's List View inspector, go through each of the Tab Bar's list of View Controllers.Make sure their Class identities are the correct type of View Controller, and make sure that their NIB names (if appropriate) are correct. In a simple experiment, I dragged a Tab Bar Controller into a XIB. I deleted one of the (two) View Controllers from the Tab Bar Controller. Then I dragged a Navigation Controller into the XIB, and moved it into the Tab Bar Controller's hierarchy.But the Navigation Controller's Root View Controller's class identity shows up as a simple UIViewController. I had to select that and specifically set its identity to UITableView Controller. Hope This Helps a Little . . . Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: What classes have -init?
On Feb 10, 2010, at 12:23 PM, James Walker wrote: I think at times I've written things like [[NSMutableArray alloc] init] with no apparent ill effects, but now I notice that the docs for NSMutableArray and NSArray don't say that there is an init method. The NSObject docs say that an init method might raise an exception. Is there some other init rule that I've missed, or have I just gotten lucky? When in doubt, remember to look at the super-class documentation: http://developer.apple.com/mac/library/documentation/cocoa/reference/Foundation/Classes/NSObject_Class/Reference/Reference.html#//apple_ref/doc/uid/2050-init All classes that inherit from NSObject (which means pretty much all of them) inherit NSObject's –init method, and that's assumed or implicit in the Array examples you referenced above . . . Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Strange UIImageView error
On Feb 7, 2010, at 4:33 PM, Development wrote: I am adding an image to a UIImageView and every time that I try to I get this error: Error: invalid distance too far back\n and only about the top 10 lines of the image appear in the view, the rest is black even though the image size is correct.___ There's a possibility that error is coming from zlib when decompressing whatever image you're using --- is it a PNG ? Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Strange UIImageView error
On Feb 7, 2010, at 5:53 PM, Development wrote: Yes it is a png and that makes sense since google only shows zlib errors when I search it. If whatever image editor you're using can be beaten into submission you might try fiddling with the interlace options and the compression options . . .Otherwise it might be a corrupted image . . . Cheers, . . . . . . . .Henry On Feb 7, 2010, at 6:16 PM, Henry McGilton (Boulevardier) wrote: On Feb 7, 2010, at 4:33 PM, Development wrote: I am adding an image to a UIImageView and every time that I try to I get this error: Error: invalid distance too far back\n and only about the top 10 lines of the image appear in the view, the rest is black even though the image size is correct.___ There's a possibility that error is coming from zlib when decompressing whatever image you're using --- is it a PNG ? = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Dealing with rotten nibs
On Feb 6, 2010, at 9:57 AM, Matthew Weinstein wrote: It's associated with an NSDocument... On Feb 6, 2010, at 9:41 AM, edole...@gmail.com wrote: is it assoc with a view controller class? -- Sent from the Verizon network using Mobile Email --Original Message-- From: Matthew Weinstein mwein...@kent.edu To: cocoa-dev@lists.apple.com Date: Sat, Feb 6, 8:55 AM -0800 Subject: Dealing with rotten nibs I have a very large nib file that lately has refused to make any connections. I can cntrl-click and get the wire but the other end is refused by all objects. Nothing seems to allow connections either interface elements or objects; outlets or actions... Has anyone run into this, and any fixes? Well, as a very first, silly, simple test, check the class identity of the whatever it is . . . Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Touch: Non-rectangular Touch areas
On Feb 6, 2010, at 11:28 AM, Paul Sanders wrote: Perhaps you could use separate images and convert them to monochrome, saving them as 1 bpp bitmaps (aka masks). Memory should not then be an issue. Paul Sanders. - Original Message - From: Andrew Farmer andf...@gmail.com To: Jens Alfke j...@mooseyard.com Cc: cocoa-dev@lists.apple.com Sent: Saturday, February 06, 2010 7:19 PM Subject: Re: Touch: Non-rectangular Touch areas Another simple approach is to use an image to do hit testing. You can either create a bitmap image for each touchable area, or a single image with a different color for each target, then test the color at the target point to determine membership. My only concern with using this approach on iPhone might be the memory usage of that image. You could consider representing each of your trapezoids (or, for that matter, any arbitrary shape) via a CGPath object, and then use CGPathContainsPoint for your hit testing . . . Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Touch: Non-rectangular Touch areas
On Feb 6, 2010, at 3:45 PM, Development wrote: I really like the sound of this solution. I've never worked with CGPaths, is that anything at all like NSBezierPath? Conceptually similar, in that a CGPath is the Core Graphics analogue of NSBezierPath. Just like NSBezierPath, you can create essentially any kind of vector-based shape that can be described by a series of move-to-point, line-to-point, arcs, arc-to-point, cubic Bézier curve, and Quadratic Bézier curve . . . because it seems like this might be the way to go. Can I use an Image to create a CGPath? From the subject of your original question I drew a plausible but potentially wrong assumption that the 'Touch' refers to iPhone touches, hence the suggestion to use CGPaths instead of NSBezierPath. From that assumption I made another one, namely, that somewhere you have specifications of the shapes of your trapezoids, and that such specifications could then be used as the basis for CGPath objects. So where are the trapezoids coming from?Are they simply arbitrary random images with no underlying vector specifications? If you have specifications, there might not be any need for images at all, or, if images are actually required for whatever reason, they could additionally be manufactured on the fly by drawing into Core Graphics Image Contexts . . . Maybe clarify the problem specification a little . . . Cheers, . . . . . . . .Henry On Feb 6, 2010, at 2:44 PM, Henry McGilton (Boulevardier) wrote: On Feb 6, 2010, at 11:28 AM, Paul Sanders wrote: Perhaps you could use separate images and convert them to monochrome, saving them as 1 bpp bitmaps (aka masks). Memory should not then be an issue. Paul Sanders. - Original Message - From: Andrew Farmer andf...@gmail.com To: Jens Alfke j...@mooseyard.com Cc: cocoa-dev@lists.apple.com Sent: Saturday, February 06, 2010 7:19 PM Subject: Re: Touch: Non-rectangular Touch areas Another simple approach is to use an image to do hit testing. You can either create a bitmap image for each touchable area, or a single image with a different color for each target, then test the color at the target point to determine membership. My only concern with using this approach on iPhone might be the memory usage of that image. You could consider representing each of your trapezoids (or, for that matter, any arbitrary shape) via a CGPath object, and then use CGPathContainsPoint for your hit testing . . . Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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/development%40fornextsoft.com This email sent to developm...@fornextsoft.com = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Touch: Non-rectangular Touch areas
On Feb 6, 2010, at 6:45 PM, Kyle Sluder wrote: On Sat, Feb 6, 2010 at 3:45 PM, Development developm...@fornextsoft.com wrote: I really like the sound of this solution. I've never worked with CGPaths, is that anything at all like NSBezierPath? because it seems like this might be the way to go. Can I use an Image to create a CGPath? No. This seems to be backwards, anyway. It sounds like you already know the pattern of tessellated trapezoids you need to use as your hit regions. Why not just do the math yourself? Trapezoids are convex polygons, and are fairly easy to triangulate. Well, that too . . .If you're going the 'Do It Yourself' route, a fantastic resource is the Wild Magic Geometric Tools web site here: http://www.geometrictools.com/index.html Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Showing a menu after a delay...?
On Feb 1, 2010, at 2:11 PM, Eric Gorr wrote: Strange, I just replied to Richard saying that my selector is not performed until after the mouse button goes up. I can hold the mouse button down for several seconds and not see the selector performed. Of course, this may actually be due to the fact that my core event loop is based around ReceiveNextEvent rather then a pure Cocoa event loop. Perhaps that is what is interfering Might be headed to DTS for this one... Well, the documentation does say: This function tries to fetch the next event of a specified type. If no events in the event queue match, this function will run the current event loop until an event that matches arrives, or the timeout expires. Except for timers firing, your application is blocked waiting for events to arrive when inside this function. Cheers, . . . . . . . .Henry On Feb 1, 2010, at 5:05 PM, Gustavo Pizano wrote: Eric Hi, What Richar said its what Im actually doing to achieve such a behaviour, using the performSelectorAfterDelay, will be your best shot but what I do is that if the mouse goes up you just call the the NSObject method cancelPreviousPerformRequestsWithTarget. then the selector will not be performed. Hope it helps Gustavo On Feb 1, 2010, at 10:44 PM, Richard Penwell wrote: An alternative technique would be roughly: 1. Detect mouse down, set state down 2. Call performSelectorAfterDelay 1 second with a test method 3. If the mouse goes up, set state up 4. In the test method, test if the state is down... On Feb 1, 2010, at 4:42 PM, Eric Gorr wrote: What I am trying to accomplish is displaying a menu (perhaps with NSPopUpButtonCell's performClickWithFrame method) after a user clicks on a sublass of NSButton and holds the left mouse button for = 1 second. Is anyone aware of any sample code doing this? I imagine I will need to customize the mouseDown method of NSButton with a loop that checks to see if the mouse button is still down. However, I am uncertain how to determine this. I have seen NSEvent's pressedMouseButtons method, but it only became available with the 10.6 SDK and I need something that works with 10.5. I am also thinking that I may be taking the wrong approach, so any suggestions on what approach I should be taking would be appreciated. Thank you.___ 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/almightylinuxgod%40me.com This email sent to almightylinux...@me.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/gustavxcodepicora%40gmail.com This email sent to gustavxcodepic...@gmail.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/appledeveloper%40trilithon.com This email sent to appledevelo...@trilithon.com = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: How to enable/disable a UITextField or UITextView programmatically?
On Jan 13, 2010, at 6:22 PM, William Squires wrote:
I have a UITableView that's part of a Navigation-based Application. There's
one .xib, a DrinkDetailViewController class (.m .h files) and an
AddDrinkViewController class which inherits from DrinkDetailViewController.
Both share the same view, which contains a UITextField, two UITextViews, and
some UILabels. The DrinkDetailViewController.h declares three IBOutlets as
follows:
#import UIKit/UIKit.h
@interface DrinkDetailViewController : UIViewController
{
IBOutlet UITextField *nameField;
IBOutlet UITextView *ingredientsView;
IBOutlet UITextView *directionsView;
...
}
@end
so that I can access the UITextField, and the two UITextViews. IB shows in
the inspector window, that the UITextField, and UITextViews have a BOOL
enabled property (controlled by a checkbox labeled Enabled). But the
following doesn't work:
...
nameField.enabled = YES;
ingredientsView.enabled = YES;
directionsView.enabled = YES;
...
in the viewDidLoad: method of AddDrinkViewController. I unchecked the enabled
box for these controls as the normal use of the view is just to display drink
information, not for data entry. The AddDrinkViewController re-uses the view
for data entry, and I want to re-enable the fields, but only when the view
(xib) is used/loaded by the AddDrinkViewController. I looked in the docs for
UITextField, but didn't even see a reference to an enabled property. Is this
another of those view-within-a-view problems?
Theenabledproperty is defined in UIControl --- the super-class of
UITextField . . .
This is a good time for a plug for Xcode's incredibly useful but oft skipped
over Class Browser,
the second item in Xcode's Project menu . . .
Cheers,
. . . . . . . .Henry
=
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Re: iPhone: validate a NSString for US zipcode
On Jan 7, 2010, at 8:53 AM, Eric E. Dolecki wrote: I don't care about the city, just that the zip code will work. On an iPhone testing against an array of 42,305 values... could that be pretty quick? Seems like a large set to go through looking. I'm sending the value to a webservice to return weather data. Time to read about Binary Search --- for a list that size you can find (or not) a match in just 16 comparisons . . . Cheers, . . . . . . . .Henry On Thu, Jan 7, 2010 at 11:45 AM, Paul Bruneau paul_brun...@special-lite.com wrote: I'm a little unclear what you are asking, but I'll tell what I know. You just want to know if a 5 digit zip code is a valid one? Or do you want to compare it to the list of valid city names that are assigned to it? (yes it can be more than one, ugh) They are (from a non-USPS point of view) arbitrarily assigned by the post office and there are currently 42,305 or so assigned (out of a theoretical maximum of 100,000 of course) So assuming you just want to know if it's a valid zip (and don't care about if they got the city right), the only way to validate it solely from within your app as a valid zip code would be to have a list of them in your app. You could load them from a plist or straight text I guess into an NSArray or NSSet and then check to see if the zip is valid as needed. You can get the list from a third party service like http://www.zipcodeworld.com/ or maybe from some free source. The value of this might be questionable, since a zip code with a typo still has roughly a 50% chance of being a valid one. Plus the USPS is always adding new ones, so will you risk telling your user that his zip code doesn't exist when he is standing in it? So I guess the answer is there is no Cocoa technology that can help with this--unless you are asking something completely different, in which case let's all have a good chuckle at my poor comprehension skills :) On Jan 7, 2010, at 11:11 AM, Eric E. Dolecki wrote: I've been googling but haven't seen yet how to best validate a 5-digit zipcode for use in the US (without using a webservice). I have the NSString, I just need to validate it. I know zero RegExp, is there a formatter I can use? = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: NSBitMapImageRep Woes
On Jan 6, 2010, at 9:21 AM, David Blanton wrote:
Here is the code:
@interface MyDocumentView : NSView {
@public
NSBitmapImageRep* m_NSBitmapImageRep;
NSRect m_frameRect;
float m_sz;
BBitmap m_bitmap;
unsigned char* m_ptrs[1];
}
- (void)awakeFromNib {
m_ptrs[0] = (unsigned char*)m_bitmap.m_array;
m_NSBitmapImageRep = [[NSBitmapImageRep alloc]
initWithBitmapDataPlanes:m_ptrs
pixelsWide:m_frameRect.size.width
pixelsHigh:m_frameRect.size.height
bitsPerSample:8
samplesPerPixel:4
hasAlpha:YES
isPlanar:NO
colorSpaceName:NSCalibratedRGBColorSpace
bitmapFormat:NSAlphaFirstBitmapFormat
bytesPerRow:(4 *
m_frameRect.size.width)
bitsPerPixel:32];
}
Two questions:
1.where ism_frameRectinitialised ?
2.and are the width and height initialised to the precise number of bits
per row and number of rows
of whatever m_ptrs[0] is pointing at ?
3.(I said previously I can't count), are there potential endian issues
involved ?
- (void)drawRect:(NSRect)dirtyRect {
[NSGraphicsContext saveGraphicsState];
[m_NSBitmapImageRep drawInRect:dirtyRect];
[NSGraphicsContext restoreGraphicsState];
}
m_bitmap.m_array is created in readFromData:ofType:fromFile
I know it is correct because if I use this code I get proper results:(in this
case bitmap is a local var but is generated just m_bitmap is.
context = CGBitmapContextCreate (bitmap.m_array, bitmap.m_pixelsx,
bitmap.m_pixelsy, 8, bitmap.m_pixelsx * 4, colorSpace,
kCGImageAlphaNoneSkipFirst|kCGBitmapByteOrder32Host);
CGImageRelease(_cgImageRef);
_cgImageRef = CGBitmapContextCreateImage (context);
CGImageRetain(_cgImageRef);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
The problem is I just see garbage, no image. Clearly I am doing something
wrong with the NSBitMapImageRep but I have no idea what.
Please comment!
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Re: NSDate without time portion
On Jan 5, 2010, at 1:43 PM, mmalc Crawford wrote: On Jan 5, 2010, at 1:35 pm, Kyle Sluder wrote: On Tue, Jan 5, 2010 at 1:23 PM, mmalc Crawford mmalc_li...@me.com wrote: An NSDate object represent a single point in time -- you can think of it basically as a wrapper for an NSTimeInterval from the reference date. If you want to create components from the date, then you must do so with respect to a particular calendar *and time zone*... This is of course possible, but then you have to be careful about always using the same combination of calendar and time zone to create the components and recreate the date from the components. I believe that Quincey's argument is that it is conceptually inaccurate in most cases to think of a point in time as simply an interval from a reference date. I agree that in contexts where words like today are meaningful, he's probably right. Especially in calendaring/scheduling apps. Given the number of people who struggle with the concept of daylight saving time, I am not surprised that I have yet to meet a non-technical person who could conceptualize a point in time independently of a calendar system. I'm not sure what the point is here, though? It's the job of the application to present to the user a representation of a date that they can understand. It's the job of the programmer to interpret that unambiguously such that it can be stored and recreated -- which is the issue here. Talking about date components in the abstract as if any date can arbitrarily be reduced to a collection of components without reference to any other context (the calendar and time zone) is misleading. For more fun with calendars, Wall(et) Street Journal had a nice article yesterday: http://online.wsj.com/article/SB126212850216209527.html Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: iPhone Creating a months view
On Jan 4, 2010, at 11:17 AM, Nick Zitzmann wrote: On Jan 4, 2010, at 11:35 AM, Eric E. Dolecki wrote: I am creating an iPhone view that has 12 months of views in it starting with January. Don't make assumptions about calendars unless you are absolutely sure you can get away with them, e.g. every calendar currently in use in the world uses seven day weeks. In this case, you shouldn't, because, for example, while it's true that most calendar types have exactly 12 months in a year, the Hebrew calendar has 12 months in a regular year and 13 months in a leap year. You can use NSCalendar to figure out how many months there are in a given year. For each subview (month) I need to get the 1st day of the month (which calendar day it falls on as an int). For instance Jan 2010 begins on a Friday (int of 5 I assume). Again, use NSCalendar and NSDateComponents. They are available on the iPhone OS; the older NSCalendarDate class is not available on the iPhone OS. As a follow-on to Nick's caveats above, check out NSLocale Calendar Keys in the NSLocale Class Reference for a list of calendars supported on the phone. Note that the phone-supported calendars are a subset of those supported on Mac OS X. And NSCalendarDate appears to have vanished from Mac OS X Foundation as well . . . Amateur and Professional calendar scholars alike can visit this web site for everything you never wanted to know about calendar lore: http://emr.cs.iit.edu/home/reingold/calendar-book/index.shtml Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: NSImage
On Dec 31, 2009, at 2:26 PM, David Blanton wrote: Given an array of color data (a generic bitmap) what is the best / fastest / recommended method to convert this to an NSImage? Load your data into memory, create an NSBitmapImageRep from that pile of data, then make an NSImage from the NSBitmapImageRep . . . Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Knowing mouse pressed time?
On Dec 30, 2009, at 2:53 AM, slasktrattena...@gmail.com wrote:
Simple. Start a timer on mouse down, invalidate it on mouse up.
Something like this (written in mail):
NSTimer *timer;
-(void)mouseDown:(NSEvent*)ev
{
timer=[[[NSTimer alloc] blah ...] retain];
}
-(void)mouseUp:(NSEvent*)ev
{
if ( [timer isValid] ) {
[timer invalidate];
[timer release];
timer = nil;
} else {
// perform single-click action
}
}
-(void)performHoldAction:(NSTimer*)tmr
{
// pop up menu
}
Not to 'invalidate' your suggestion, but why not simply ask the appropriate
event objects for their timestamps ?Or did I overlook something in the
original question ?
Cheers,
. . . . . . . .Henry
=
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Re: Knowing mouse pressed time?
On Dec 30, 2009, at 11:43 AM, Gustavo Pizano wrote:
Henry hi.
You mean with the NEEvent method that returns the timestamp?... I was trying
that also, and as far as I understood its the timestamp between the App
startup and the event... so I dunno how this might help me... maybe I
misunderstood the API doc?
To clarify the original question, what I want to achieve is something similar
to 10.6 dock, when you press the mouse on an icon, after a second or so, the
menu appears. I dunno if this is what you understood.. I hope its better
explained now. :P
Sorry I did not intend the thread to get into a deep discussion on the relative
merits
of how to do things, nor, as I said, to invalidate Fabian's idea.
I meant that rather than setting a timer and implementing a callback method and
remembering to invalidate the timer, and so on and so on, you can do something
like this (which took less time to implement than the time required to explain
it . . . ):
- (void)mouseDown:(NSEvent *)theEvent
{
NSLog(@mouseDown);
[self setStartStamp: [theEvent timestamp]];
}
- (void)mouseUp:(NSEvent *)theEvent
{
NSLog(@mouseUp);
NSTimeInterval endStamp = [theEvent timestamp];
NSLog(@time difference = %.2f, endStamp - [self startStamp]);
}
where startStamp is an instance variable that records the timestamp on
mouse down.
Then on mouse up, you grab the timestamp of the mouseUp's event and take the
difference
between the two timestamps . .
Yes, the event's timestamp is the time since system startup (which I interpret
to mean the time
since last reboot), but that doesn't really matter --- all you're concerned
about is the
difference in time between mouse down and mouse up . . .
Interesting that I just recently implemented something like this for the iphone
for similar
reasons, namely, to decide whether to show the Cut/Copy/Paste menu . . .
Hope that clarifies what I meant.
Cheers,
. . . . . . . .Henry
=
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Re: Updating tracking areas Rect
On Dec 28, 2009, at 3:27 PM, Graham Cox wrote:
On 29/12/2009, at 4:00 AM, Joar Wingfors wrote:
NSInteger i = 0;
while ([[self trackingAreas] count]==0) {
[self removeTrackingArea:[[self trackingAreas]
objectAtIndex:i]];
i++;
}
That loop seems all kinds of wrong... ;-)
How about:
for (NSTrackingArea *trackingArea in [self trackingAreas]) {
[self removeTrackingArea:trackingArea];
}
Wouldn't this fall foul of the usual problem with deleting items from the
collection being iterated, in that it will skip every other object? (Or
perhaps fast enumeration has a built-in protection against that?)
Yes, fast enumeration specifically states:
Enumeration is “safe”—the enumerator has a mutation guard so that if you
attempt to modify the collection during enumeration, an exception is raised.
And also:
Since mutation of the object during iteration is forbidden, you can
perform multiple enumerations concurrently.
The first loop is also wrong in that its terminating condition is backwards
(should be 0) as well as having the skip every other object problem. If you
want to remove items from the collection being iterated, you should copy the
collection temporarily and iterate that or iterate it by index backwards.
Cheers,
. . . . . . . .Henry
=
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[iPhone] NSKeyedArchiver with NSValue Objects
I bashed into a problem with NSKeyedArchiver trying to encode NSValue objects. I am using NSValue to wrap up CGPoint and CGSize structures, then doing an encodeObject: forKey: to encode the NSValue. I get this message: [NSKeyedArchiver encodeValueOfObjCType:at:]: this archiver cannot encode structs' I poked around in CocoaBuilder and Google for some definitive answers, but the discussions appear to be mostly froth. This seems a little strange, as UIKit provides a bunch of NSValue additions to encode those CG structs, but the NSKeyedArchiver can't encode them. And the message is somewhat misleading: I'm encoding the NSValue object, not the structure . . .I'm assuming (I know, one should never assume) that the NSValue object is invoking that encodeValueOfObjCType:at: message . . . I'd like to get some clarification or definitive answers on what's going on . . . The available discussions I was able to find were not very helpful . . . In the meantime, for anybody else tripping over this, I worked around it by encodeObject: NSStringFromCGPoint(point) forKey: locationKey Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Core Data Anomaly?
On Dec 23, 2009, at 7:41 PM, Richard Somers wrote: In my application when I do the following something strange happens. Add a managed object to the store, save the file, then save the file as another name. Upon saving the file with another name, core data will create and then destroy some kind of transitory shadow object of the same kind as the one in the store. Is this normal? Just a wild guess --- are you saving atomically ?When writing NSData objects, as one example, you can write to file atomically, in which case the object is written to a backup file which is renamed if the write succeeds.The idea is that the write either succeeds or fails, but nothing in between that would leave a corrupted file . . . Cheers, . . . . . . . .Henry = iPhone App Development and Developer Education . . . Visit www.nonatomic-retain.com Mac OSX Application Development, Plus a Great Deal More . . . Visit www.trilithon.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 arch...@mail-archive.com
Re: Inspect Core Graphics Object
On Dec 22, 2009, at 9:33 AM, Richard Somers wrote: How do you inspect or print the description of a Core Graphics object? There's no analogue to the -description method of Objective-C frameworks. Many of the specific Core Graphics types like CGColor and CGColorSpace and CGImage and CGFont have various 'Get . . .' function calls that provide sundry information about the object (CGColorGetComponents on CGColor, for instance).For CGPath, there's a CGPathApply by which you can play back the elements of the path, and so on. You have to look at the stuff on a case-by-case basis . . . Cheers, . . . . . . . .Henry iPhone App Developer Education --- visit www.nonatomic-retain.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 arch...@mail-archive.com
Re: UIImage and shadows, WAS: Re: Please if some one knows
On Dec 21, 2009, at 8:02 PM, Development wrote: Then I don't understand how to do this. Do I create the context at this larger size? because that's what I did. Do I drawInRect the image at it's original size? Because that's what I did. As near as I can tell, no matter what I do, the image itself, not accounting for the shadow, is drawn in the upper left corner. this causes a negative shadow, or one to the upper left, to be cut off by the edge of the context. I have attempted using drawAtPoint, and accounting for the negative shadow by moving the point an amount that should accommodate the shadow. It did not work. Now if the shadow is to the lower right, the adjustments I make work perfectly every time and the shadow is exactly what it should be. I think the point is that I do not understand the context drawing. I thought I did but it should be painfully obvious from this thread that I do not. Are you aware that the context you get from UIGraphicsBeginImageContext has its origin at upper left ? In any case, I have posted a mini example that *appears* to do what you want, but based on the descriptions, I might have misunderstood, in which case please excuse me for wasting bandwidth . . . The project is here: http://www.trilithon.com/download/Shadow.zip Cheers, . . . . . . . .Henry On Dec 21, 2009, at 8:45 PM, Graham Cox wrote: On 22/12/2009, at 1:49 PM, Development wrote: however what I am getting now is a larger image, offset in the view and still cutting off the shadow. So I honestly do not know how I am suppose to draw this shadow. I would really be grateful for some additional direction. Try thinking instead of flailing about throwing code at it. You need a bigger image to accommodate the shadow. But the image you want to composite on top is the same size as it always was. So you need to keep its original size around so you can draw it at that size but into the larger image context. If you draw it at the new size you are back at square one, but larger. --Graham ___ 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/appledeveloper%40trilithon.com This email sent to appledevelo...@trilithon.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 arch...@mail-archive.com
Re: double free error
On Dec 14, 2009, at 12:45 PM, Eric E. Dolecki wrote:
I was receiving malloc double free errors when a view removed itself, so all
of the releases I was doing in the view I commented out, the view killing
itself after it animates from visual view:
- (void) killMe:(NSString *)animationID finished:(NSNumber *)finished
context:(void *)context {
[self.view removeFromSuperview];
}
removeFromSuperview
Unlinks the receiver from its superview and its window, and removes it from the
responder chain.
- (void)removeFromSuperview
Discussion
If the receiver’s superview is not nil, this method releases the receiver.
===
If you plan to reuse the view, be sure to retain it before calling this method
and be sure to release it as appropriate when you are done with it or after
adding it to another view hierarchy.
===
I no longer receive the malloc double free errors. I was creating NSStrings
and NSDateFormatters (init type stuff), all of which I previously was
releasing myself. Does it sound reasonable that the removeFromSuperview was
cleaning all that up already and thus the releases caused the errors? I am
trying to still get my head around memory management.
Cheers,
. . . . . . . .Henry
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Re: Hang Initializing App
On Dec 10, 2009, at 4:51 PM, Joe Programmer wrote: I made a similar post to the Xcode list originally, but it was suggested that I redirect it to the Cocoa list. Here it is: I'm working with a Cocoa app compiling with gcc 4.0 in Xcode 3.2.1. Both the debug and the release builds launch fine from the Finder, but the app does not launch through the debugger in Xcode. The app's icon appears in the doc, but the app just hangs in the debugger. This app was debugging fine under Xcode 2.5 and 10.5.x. However, I had to update the code in countless places to get it to build in 3.2.1 and 10.6. Backing out those changes to discover the cause is something I'd like to avoid if possible. I made some changes to resources, but I *think* I was able to back them all out with the error still occurring. Two occurrences of this massage are appearing in the console: -[NSCFArray _getCString:maxLength:encoding:]: unrecognized selector sent to instance 0x4016e0 In a reply to my Xcode list post, From the method signature, it looks like the message should have been sent to an instance of NSString, rather than NSArray, but the leading underscore indicates it is an internal method and might indicate some 'class cluster' trickery going on behind the scenes. I would concur. H --- I would not concur.Here's a potential cause: The ' fingerprint ' of the error you are seeing occurs when an object has been over-released.Let's say that in this case the object in question was an NSString. Somehow, well, because of a mistaken over-release, the memory that was previously occupied by the now deallocated NSString is now occupied by an NSArray (NSCFArray). The code then sends an NSString message via an object reference that was once pointing to an NSString but is now pointing to an NSArray . . . With my limited knowledge of Cocoa, viewing the call stack does not reveal the cause of this problem. #00x92fad4e6 in objc_exception_throw #10x92a0790b in -[NSObject(NSObject) doesNotRecognizeSelector:] #20x92962db6 in ___forwarding___ #30x92962982 in __forwarding_prep_0___ #40x9291bc53 in CFStringGetCString #50x930a4990 in _RegisterApplication #60x930a3182 in GetCurrentProcess #70x908e2071 in GetSystemUIMode #80x908e2013 in IsMenuBarVisible #90x93991092 in _NSInitializeAppContext #10 0x9399094c in -[NSApplication init] #11 0x93990485 in +[NSApplication sharedApplication] #12 0x9398f45d in NSApplicationMain #13 0x2f6e in main at main.m:42 Occasionally, I am able to continue stepping/breaking through model and controller init code beyond the two breaks at objc_exception_throw, but never consistently, probably because memory is trashed. Might anyone offer any insight as to what might be going on and/or where to go from here? If you can run Clang (via Build and Analyse), it might help pinpoint potential trouble spots. But it also sounds as if you are fairly close to homing in on it based on what you just said about stepping through the code. Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: [COCOA] notification of enter/focus event?
On Dec 11, 2009, at 10:23 AM, Paxton Sanders wrote: Sorry if this is a bit too basic, but... I want to know when the user exits edit fields, so I can check values and provide immediate feedback. I'm using - (void)controlTextDidEndEditing:(NSNotification *)aNotification and it works. I also need to know when a user enters an edit field, so I can provide feedback (like a hint). I was using - (void)controlTextDidBeginEditing:(NSNotification *)aNotification but it only works when the user types something. My question is this: how can I get notification when a user simply enters a field by tabbing to it or mouse-clicking in it (and gives focus to that field)? How about -becomeFirstResponder ? Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: Bug with IB?
On Dec 10, 2009, at 6:24 AM, Eric E. Dolecki wrote: If I create a UILabel in IB in a view I place 1/2 of the label out of the view at the top, I can't seem to drag the view window around by the title bar where the label is. I know that having the control 1/2 out of the view isn't normal, but shouldn't the view window move around regardless of where I click on the window's title bar? Not necessarily --- if you just happen to click in the little IB icon in the window title bar, you'll start a drag of that icon . . . I just tried your experiment --- that is, place a UILabel halfway up out of the view (essentially 'under' the title bar), and I'm able to drag the window/view around with no problem at all *providing* I start the drag outside of the little IB icon . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: Unable to write in InfoPlist.strings file from cpp
On Dec 10, 2009, at 8:42 AM, Manfred Schwind wrote: Be careful, though: Some MacOS versions have a bug where .strings files had to be UTF16 to actually work. I don't think Apple has fixed that yet. Do you have more specific information about that? I consequently always used UTF-8 for all my .strings files in every project I ever worked on (for many years; I think I started with 10.1 or so) and never had a single problem with that. What exactly does not work when not using UTF-16? Maybe UTF-16 and UTF-8 both work, but - of course - no other encoding like ISO Latin or Mac Roman etc.? There is a very much in passing comment in 'Internationalising Programming Topics' guide for Cocoa. Note: It is recommended that you save strings files using the UTF-16 encoding, which is the default encoding for standard strings files. It is possible to create strings files using other property-list formats, including binary property-list formats and XML formats that use the UTF-8 encoding, but doing so is not recommended . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: Question about touchesBegan
On Dec 9, 2009, at 5:58 PM, Eric E. Dolecki wrote: Is there a way to define the touchesBegan in an added sub view to be constricted to a certain area and not allObjects? Thus leaving a hole to allow touches to be fired on the view below? If I interpret your question correctly, you want the added sub-view to NOT handle touches? If so, don't implement the touchesBegan/Moved/Ended methods in that sub-view. Alternatively, simply disable user interaction for that sub-view. Even more alternatively, I have found in many cases that handling touches in the View Controller that manages the view hierarchy makes life easier.You receive a touch and simply ask what view it landed in. Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: dynamic NSPointArray allocation
On Nov 28, 2009, at 2:50 PM, Quincey Morris wrote: On Nov 27, 2009, at 14:58, Shane wrote: I think I'm understanding this in part ... // *.h NSMutableData *pointData; NSPointArray *points; // *.m pointData = [[NSMutableData alloc] init]; ... NSPoint point = NSMakePoint([iters floatValue], [mse floatValue]); // not sure how to get an NSPoint into NSMutableData? // here I resize NSMutableData, but this will always only be // increasing the length by 1. [pointData increaseLenghtBy:sizeof(NSPoint)]; // and here I assign the data to NSPointArray points = (NSPoint *) [pointData bytes]; And from here I can pass this NSPointArray around till I get to the point where I will use this data for my NSBezierPath. Will NSBezierPath (which takes an NSPointArray) be able to properly read from 'points' by doing the above? In part, but not quite. Although Graham's advice was good, and might be a better approach, for completeness here's how this approach works. You only need one instance variable: NSMutableData *pointData; which you can initialize as above. To add a point, I'd do something like this: NSUInteger pointCount = [pointData length] / sizeof (NSPoint); [pointData setLength: (pointCount + 1) * sizeof (NSPoint)]; NSPointArray points = [pointData mutableBytes]; points [pointCount] = somePoint; To add the points to a Bezier path: [somePath appendBezierPathWithPoints: [pointData mutableBytes] count: [pointData length] / sizeof (NSPoint)]; Note: 1. 'NSPointArray*' isn't the correct type for an array of points. Plain 'NSPointArray' is what you want. 2. You will get a compiler warning if you try to assign [pointData bytes] to the NSPointArray variable, because the [point bytes] is of type 'const void*'. You need [pointData mutableBytes] which is just of type 'void*'. 3. There's no need to cast [point mutableBytes] to NSPointArray because there's no warning assigning from 'void*' to a compatible pointer type. Casting it is not wrong, but any time you write an explicit cast, you're overriding much of the compiler's type checking, so it's easy to introduce bugs that way. (Not likely in this case, but as a general consideration.) It's a personal thing, though -- I guess some people like to have the explicit cast because it documents what the code is supposed to be doing. Another possible approach is simply use a NSMutableArray full of NSValue objects that contain the NSPoint structures . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: Custom Controls Where to start
On Nov 26, 2009, at 4:01 PM, Sandro Noël wrote: Thank you Alastair. Well it's pretty complicated, This is my third application, the first being Bonjour Mounter, the Second RDP Launcher. Others were created but never released. I've always used the OS's controls but now I find myself frustrated with the limits of these controls in terms of looks. I see other application makers producing great looking applications with custom looking views and controls. So I want to be able to know where to start and what to think about when I create a control, a view. I did venture to read the Doc documentation, there is much there but so much it becomes confusing. for example, the look of the segment control does not fit the look that i'd like it to have, i find it's a good enough starting point to create a tab bar, a little like Safari, and add the close tab button and some status information on the right end of the tab. along with a scrolling title like on the Apple TV. From what I understand, all I would have to do is create my own cell. Also, the controls for the HUD panels are missing, there is BWHUDAppKit.framework that does partial of the work witch is amazing. but it is not complete, i like to use the CollectionView control, and it hans not been implemented, so i'm off to do it myself. there are also table cels missing, i would like to create those too. I think that once I've done these I would pretty much be able to create my own out of this world looking controls while preserving HIG intact. and it will also give me a better understanding of the underpinnings of cocoa. You might want to check out BWToolkit: http://www.brandonwalkin.com/bwtoolkit/___ 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 arch...@mail-archive.com
Re: CATransition for whole windows?
On Nov 23, 2009, at 10:33 AM, PCWiz wrote: What I had in mind was a window vanishing effect for when the window is closed (for example a fade out is easy to do with [[window animator] setAlphaValue:0.0];) but something slightly more complex, such as the private suckEffect transition that CATransition offers. On 2009-11-23, at 11:02 AM, Matt Neuburg wrote: On Mon, 23 Nov 2009 10:32:24 -0700, PCWiz pcwiz.supp...@gmail.com said: CATransition can be used to animate views, but is there a way to animate complete windows (NSWindow's or NSPanel's)? Animate *what* about a complete window? If you mean what's *in* the window, that *is* a view (the window's contentView). If you mean make the window dance around the screen somehow, please don't. ) m. For those interested I've posted a view simple quick and dirty Window animation that shrinks the window down to effectively zero, and can then expand it back to its original state.Use the View menu Flip item to see. http://www.trilithon.com/download/FlipWindow.zip Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Problem With Setting Badge via Interface Builder
I wonder if anybody else has seen this particular end case. I googled for anything remotely like this problem and found nothing really relevant, and CocoBuilder is down right now. In a group learning situation last week, one of the people stumbled over a problem defining and then trying to un-define a Tab Bar Item Badge using Interface Builder.The scenario is this: We started with a Window-based Application (having decided the Xcode Tab Bar iPhone Application template is too confusing --- That's not necessarily germane to the discussion to follow). First thing is to drag a Tab Bar Controller object into MainWindow.xib. You change the view of MainWindow.xib to List View, so you can fiddle around making the various View Controllers have the correct class identities and do other stuff . . . One of the group was exploring, selected the Tab Bar Item, saw the Badge property, thought, 'This could be useful', and set the Badge value to some number (let's say 5) . . .The Tab Bar Item dutifully displayed a nice badge with the number 5 inside. Having seen that, he then selected the Badge text field and deleted the text. But, the badge itself stays around, just does not display any content.In other words, a blank badge. Given that the default value of the Tab Bar Item's Badge property is nil, I surmise that setting that property to *anything* via Interface Builder will then create an NSString.At that point, even if one deletes the text in the text field, the badge property is then/still displaying a zero-length NSString. Using Interface Builder, the only solution appears to be to delete the Tab Bar Item and re-create it, which, while likely taking only a minute or so to set up everything and establish correct class identity and such , seems a little akin to swatting mosquitoes with sledge-hammers . . . The other approach is to grab the Tab Bar items in the App Delegate and set all their badge properties to nil. Of course that means one needs to be aware of which items actually *want to* be badged . . . I'd like to know if anybody else has stumbled over this one. Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: question about informal protocols
On Nov 20, 2009, at 12:22 PM, Jens Alfke wrote: On Nov 20, 2009, at 12:09 PM, Michael de Haan wrote: Does the, in your opinion, optional addition pretty much replace categories as a whole, or is there still a role for them? It replaces informal protocols. There are many other uses for categories, like * Breaking a class implementation across several source files * Declaring private/internal class methods that a few other classes are allowed to call * Declaring some of a class's methods in other headers (ones that only make sense in the context of that other header) * Adding methods to a pre-existing framework class Not to overlook the all-important AppKit and UIKit 'Additions' to their respective Foundation Frameworks . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: UITextField in UITableView covered by keyboard
On Oct 23, 2009, at 10:29 AM, Bob Barnes wrote: Hi all, I posted this a yesterday, but it never appeared on the list and it's not showing up in the web archive so I thought I'd retry. I have a UITableView that contains some cells with UITextField's embedded in them. When I touch the UITextField to begin editing the keyboard pops up and obscures the the text field. I've been looking at the UICatalog sample, which has a nearly identical setup and the UITextField scrolls up to make itself visible, but I've been unable to determine what it's doing to cause that. I've read suggestions on scrolling the UITexField rect, resizing the UITableView, etc., but UICatalog doesn't do any of that, yet still works. What am I missing? You may also have to consider the scenario where the Table View Cell that contains the UITextField is so close to the end of the Table View that it can not be scrolled up out of the way. In the case, you have to temporarily move the entire Table View upwards by adjusting its frame origin . . . Best Wishes, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: UITabBar UIActionSheet
On Oct 7, 2009, at 4:35 PM, Luke the Hiesterman wrote: If you subclass UITabBar you can get the touches yourself and respond appropriately. Luke You can also set a delegate for the Tab Bar Controller and implement the - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController This method gets invoked even if you select an already selected tab . . . Cheers, . . . . . . . .Henry On Oct 7, 2009, at 4:03 PM, Mark Bateman wrote: Hi, I have an app that uses a TabBarController and on certain of the tabbar items I want the user to be presented with a UIActionsheet even if the user presses the the same tab bar item that is currently selected. I have tried the viewwillappear method and that works only if i select another icon first. I also tried to use setneedsdisplay using the delegate method - (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item but this method never runs. Any help would be appreciated Mark. ___ 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/luketheh%40apple.com This email sent to luket...@apple.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/appledeveloper%40trilithon.com This email sent to appledevelo...@trilithon.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 arch...@mail-archive.com
Re: app delegate +initialize
On Oct 7, 2009, at 8:39 PM, John Baldwin wrote: Perhaps that's what's tripping me up: bogus expectations. Here's what I have set up. In the xib file, the File's Owner delegate is set to an AppController instance (an object in the xib). The AppController has a +initialize method which initializes my user defaults. Inside the xib is a window which is set to visible at launch. The error happens in the window controller for this window, which is expecting the user defaults to be initialized by the AppController instance. So I'm expecting the AppController instance to be loaded and the +initialize method to be called before my window controller is loaded and its outlets start getting referenced. John The order of un-archiving from a NIB is un-defined . . . Cheers, . . . . . . . .Henry On Wednesday Oct 7 10:48 AM, at 10:48 AM, Jens Alfke wrote: On Oct 6, 2009, at 11:30 PM, John Baldwin wrote: When the application crashes on launch, there is no record of the +initialize method being called. When the application launches successfully, there is a record of the +initialize method being called. I haven't been following the whole thread, but are you assuming that all classes are initialized immediately when the process launches (similar to C++ static initializers)? Because that isn't the way it works. A class isn't initialized until the first time it's used — by creating an instance, calling a class method, or looking up the class by name. So it's entirely possible that something unrelated to this class is causing a crash before that class ever gets referenced. Are you able to get a backtrace or crash log? —Jens ___ 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 arch...@mail-archive.com
Re: Drawing a graph testing ranges
On Sep 15, 2009, at 5:20 AM, Graham Cox wrote: On 15/09/2009, at 10:07 PM, Mark Bateman wrote: if I have a value of x= 10,000 y = 211.2 and an envelope of 9500, 200: 13000, 211: 14000,214: 9500,214 can i use NS range to check if the original coordinates are inside the bounds of that rectangle... if not any ideas how i might do that... NSPointInRect(...) or CGRectContainsPoint(...) The way I usually do graph plotting is to normalise (usually the dependent variables) to the height of the plot rectangle. Presumably you don't want plot points to disappear simply because they're larger than the size of the rectangle . . . Cheers, . . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: coding NSNumber in NSArray?
On Sep 14, 2009, at 9:11 AM, jon wrote:
I thought i had read that NSNumber knew how to code itself in an
NSArray... is this not the case? or is this code below just set up
all wrong? and what would the proper way be to set this up?
bookMarkNode's coders are below, this object has the one
NSNumber, and two NSStrings
when i look in the debugger at allItems, the NSNumber is not
well defined.
thanks in advance,
Jon.
BookMarkNode *node1 = [[BookMarkNode alloc] init];
[node1 setTypeOfLeaf:[NSNumber numberWithInt:0]];
[node1 setNodeTitle:@eBay];
[node1 setURL:@http://www.ebay.com/;];
etc...
NSArray *allItems = [NSArray arrayWithObjects: node1, ..etc
nil];
[node1 release];
You're creating an auto-released NSNumber instance, and then releasing
it.At a first guess,
it's over-released . . .
//
---
- (NSArray*)mutableKeys
{
NSArray *tempKeys = [NSArray arrayWithObjects:
@typeOfLeaf,
@nodeTitle,
@urlString,
nil];
return tempKeys;
}
//
---
- (id)initWithCoder:(NSCoder*)coder
{
self = [self init];
NSEnumerator *keysToDecode = [[self mutableKeys] objectEnumerator];
NSString *key;
while (key = [keysToDecode nextObject])
[self setValue:[coder decodeObjectForKey:key] forKey:key];
return self;
}
//
---
- (void)encodeWithCoder:(NSCoder*)coder
{
NSEnumerator *keysToCode = [[self mutableKeys] objectEnumerator];
NSString *key;
while (key = [keysToCode nextObject])
[coder encodeObject:[self valueForKey:key] forKey:key];
}
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Re: Circular references
On Sep 13, 2009, at 4:17 PM, Kyle Sluder wrote: We already know the cause and the solution: MyViewController.h imports MySubview.h, and MySubview.h imports MyViewController.h. The standard C header preprocessor trick does not help in this situation, and neither does import. The solution is to use a forward declaration. For ObjC classes this looks like @class Foo;. For functions it's a prototype delcaration: int foo();. Structs are similar: struct foo;, and C+ + classes follow suit: class Foo;. In short, this is a well-known consequence of C requiring types to be defined before they're used. --Kyle Sluder On Sep 13, 2009, at 3:56 PM, Jay Reynolds Freeman jay_reynolds_free...@mac.com wrote: Unfortunately, #import seems not to be working in the case given; I don't know why. The mechanism I suggested might be useful for chasing down why. -- Jay Reynolds Freeman - jay_reynolds_free...@mac.com http://web.mac.com/jay_reynolds_freeman (personal web site) On Sep 13, 2009, at 3:41 PM, Kyle Sluder wrote: This does not solve the problem at hand (two interfaces need a declaration of each other's symbols). The mechanism you describe is obsoleted by #import. A potentially much simpler way of handling the job as well as getting rid of all the incestuous connections is simply to handle the event processing in the View Controller. View Controllers are Responders on both desktop and mobile platforms . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: Drawing Text in an NSImage
On Aug 27, 2009, at 8:13 PM, Seth Willits wrote: drawAtPoint/drawInRect in NSString/NSAttributedString says... You should only invoke this method when an NSView object has focus. Don’t invoke this method while no NSView is focused. When an image is focused, and you draw text, it'll definitely do wonky things if the currently focused view is flipped. If we can't use these methods, are we really supposed to drop down to NSLayoutManager etc etc to draw a simple string? Is there really no secret API for image-friendly string drawing? Just want to double check before I have to go invent one... Not quite sure what is the problem you're having here, Seth. Create your NSImage.lockFocus on the image.Draw into the image. i have two apps that draw into images using drawAtPoint, and I don't see any problems relating to views . . . Cheers, . . . . . . . . Henry ___ 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 arch...@mail-archive.com
Re: Drawing text into a UiView
On Aug 23, 2009, at 10:57 PM, J J wrote: I'm trying to write an app that will page through text .. I'm trying to grab the text, find out how much with fit on a page, write the text to a view (page), then perhaps paginate the pages around it onto other views to be ready as needed. Anyone have any ideas on how this would work ? I'm having a hard time finding examples of writing text to a view directlyI'd love to do it via UIWebView, but not sure how I would know how big one page would be Why would a UITextView not do the job? UITextView is already a sub-class of UIScrollView, so all the scrolling behaviour is done for you. If you really need to 'roll your own', study the NSString UIKit Additions Reference API in UIKit. That describes methods for fitting text into specified rectangles with specified fonts and specified line-breaking modes . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: [iPhone 3.0; XCode 3.1.3] Question about when views are available for manipulation.
On Aug 8, 2009, at 1:23 AM, Brian Bruinewoud wrote: Hi, I'm a little confused about how this code works: MyController *myController = [[ myController alloc ] initWithNibName: @myView bundle: nil ]; [[ self navigationController ] pushViewController: myController animated: YES ]; myController.myProperty = itsValue; [ myController release ]; I always see the view set-up code (in this case myController.myProperty = itsValue) after the view has been displayed. It makes more sense to me to set up the view before calling pushViewController but this doesn't work. For example, if myProperty has a non-synthesized setter that expects IBOutlets to be bound it will be disappointed as they'll still be nil at this point. So, my questions are: Why doesn't initWithNibName create and bind all the IBOutlets before it returns? Because --- as Kyle Sluder stated --- laziness is a virtue, in operating systems and in programmers (but only if the latter use their laziness effectively) . . . The iPhone programming frameworks have a very simple set of design concepts for displaying data to the user of an iPhone application: opresent data in single screens oeach screen of presentable data is represented by a single UIView, which may have many associated sub-views (which fact is largely irrelevant) othat single screen / single UIView is created and managed by a UIViewController Initialisation of a UIViewController is done in one of two ways (skipping over details like the different ways to initialise Navigation Controllers or Table View Controllers): MyViewController *aController = [[MyViewController alloc] init]; or MyViewController *aController = [[MyViewController alloc] initWithNibName: @MyViewNib bundle: nil]; In both of these cases, all you have done is to allocate and initialise a View Controller.That's it. No further work is being done behind the scenes by the View Controller. In the first simple alloc-init style, the design assumption is that the View Controller will fabricate its managed view 'manually' *when the View Controller is asked to do so* by referencing its view property. In the second, initWithNibName style, the design assumption is that initWithNibName tells the newly allocated View Controller the name of the NIB that it *will* load (in the future) *when the View Controller is asked to do so* by referencing its view property. So, . . . Is the view guaranteed to be visible after pushViewController returns? Absolutely not.All you have done by invoking pushViewController is to push a View Controller onto the Navigation Controller's stack . . . Or is it still animating on another thread? The question is meaningless . . . Or is the request to display the view merely queued for the next loop through the RunLoop? Likewise . . . There's no need to bring threads and runloops into the picture (other than the regular old runloop and the main thread where all this activity is likely taking place).There is a very very simple sequence that's followed from application launch through to display of the initial screen by even the most complex iPhone applications. Given you have been talking about Navigation Controllers, the process of obtaining screens / views you can interact with programmatically starts when some other part of the program (maybe your application delegate or maybe some other View Controller) asks that Navigation Controller to supply its view and to place that view onto the window in some fashion. After that, the Navigation Controller will then ask the View Controller at the top of the Navigation stack for *its* view, and then the View Controller your were asking about earlier will go through the correct rituals to produce a screen / view of (one hopes) useful data for the end user. Similar situation with the call to makeKeyAndVisible - I've seen samples of applicationDidFinishLaunching where makeKeyAndVisible is called and then set up is done to the main window's view. I (and I am sure many others) would be highly interested to see these sample codes to which you refer.In general, if you make the window visible first and then load up your initial screen and add it to the window, the user will see a (possibly unpleasant) 'flash' as the new stuff is added. A more user-friendly approach is to (quickly) load the initial UI, add it to the window, and then display the window. I hope this has clarified some of the issues of View Controllers and Views . . . Cheers, . . . . . . . .Henry ___ 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
Re: NSMutableArray initWithCapacity and insertObject:atIndex
On Aug 9, 2009, at 9:59 PM, Adam Gerson wrote: I would like to insert objects out of order into an NSMutableArray. I create the array with NSMutableArray* cards = [[NSMutableArray alloc] initWithCapacity:5]; initWithCapacity simply makes an array large enough to contain that number of elements.initWithCapacity is just a suggestion to the class that you might want to start with that number of elements. When I try to call [cards insertObject:card atIndex:4]; I get the error: *** -[NSCFArray insertObject:atIndex:]: index (4) beyond bounds (1) Why doesn't this work? Based on the initialisation code, you have an array capable of holding five elements (with the potential for expanding as required), but that doesn't mean there are five elements in the array.After that initialisation, there are zero ( 0 ) elements in the array, and thus any attempt to store beyond the last element will fail. What you're apparently trying to do is have what's known as a 'sparse array'.Take a look at the NSIndexSet class to see if it helps you get where you want to go . . .. Another way to proceed (but for reasonably small arrays) would be to allocate an array of some size and initialise all its elements with instances of NSNull. This idea would work only in a limited universe of discourse --- clearly, if you wanted an element at 0 (zero) and another at (in Snow Leopard) 2 ^64, you're in trouble. Poke around on the web for sparse array implementation techniques . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: [iPhone 3.0] UIImage startAnimating -- how to tell when it's finished?
On Aug 8, 2009, at 6:09 PM, John Michael Zorko wrote: Hello, all ... I load a UIImageView with an array of PNG images, and call startAnimating -- this works very well. However, I need to know when the animation is done, because I need to have a thread load the next animation. Unfortunately UIImageView doesn't implement the animationDidStop:finished method :-( If anyone can give me some pointers on this, i'd appreciate it :-) My first thought (but I have not had time to explore it) is to look at the animation delegate stuff in UIView.There may be a possibility that you can start your UIImageView animating, then set yourself as the UIView's/UIImageView's animation delegate and implement the method you specified for animationDidStopSelector . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: where can I download xcode 3.2
On Jul 28, 2009, at 12:22 AM, Kyle Sluder wrote: On Jul 27, 2009, at 10:38 AM, YongLi liyon...@gmail.com wrote: I have installed the snow leopardbut i can't find the download link of xcode 3.2 1. This is cocoa-dev. This list exists for the discussion of Cocoa, not for downloading seeds or other non-Cocoa topics. 2. Snow Leopard and the developer tools are distributed under NDA and you therefore can't talk about them publicly. NDA forums can be found at http://devforums.apple.com. 3. All the downloads are in the same place: the Mac dev center at http://developer.apple.com . True, all the downloads are in the same place as you said.However, the answer to the OP's question can be found by carefully paying attention to the (publicly available PDF document) on that very download site iPhone SDK 3.0 (Snow Leopard) Read Me Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: Cahnging bgColor of a UIView not working.
On Jul 29, 2009, at 11:27 AM, Eric E. Dolecki wrote: This is good to use: #define UIColorFromRGB(rgbValue) [UIColor \ colorWithRed:((float) ((rgbValue 0xFF) 16))/255.0 \ green:((float)((rgbValue 0xFF00) 8))/255.0 \ blue:((float)(rgbValue 0xFF))/255.0 alpha:1.0] cell.textColor = UIColorFromRGB(0x33); On Wed, Jul 29, 2009 at 1:04 PM, Brian Slick briansl...@mac.com wrote: On Jul 29, 2009, at 12:56 PM, David Duncan wrote: On Jul 29, 2009, at 4:52 AM, Brandon Walkin wrote: The arguments to that UIColor method should be in the range of 0 to 1. Divide each RGB value by 255 to get them into that range. This is more of a PSA than anything (because I've seen more than a fair share of devs slap themselves on the head here too): Always ensure your using floating point division if your going to do this. That means always dividing by 255.0. I've seen too many people asking why do I always get black and pointed out because you forgot the .0 :). -- David Duncan Apple DTS Animation and Printing *jaw dropping* Well, I guess that explains that. I finally just gave up and did the math myself. Good tip, thanks! Brian What I've always wondered in this particular context of our color component specifications ranging from 0.0 to 1.0 is why the System RGB color chooser displays the component values in the range 0 to 255? You'd think by now there'd be a 'Developer Friendly' version of the chooser . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: Beginner Question Re: Memory Management
On Jun 22, 2009, at 1:39 PM, Daniel Torrey wrote: I'm looking at some sample iPhone code, and in the app delegate's applicationDidFinishLaunching method, I see // Set up the view controller MyViewController *aViewController = [[MyViewController alloc] initWithNibName:@HelloWorld bundle:[NSBundle mainBundle]]; self.myViewController = aViewController; [aViewController release]; I'm a little confused - I see an allocation, followed by an assignment, followed by a release. I think that the assignment is really a call to a setter - the myViewController field is created automagically using the @property/@synthesize syntax. Look at the @property declaration for myViewController in the .h file.The likelihood is that there is a retain declared. That means that when the setter method is invoked via the self.myViewController = aViewController; statement, a retain will be issued on the object during the assignment.That statement is essentially equivalent to writing the old-fashioned way: [self setMyViewController: aViewController]; Since a release was sent to aViewController, what keeps that object from being nuked at the end of the run loop? There must be another retain happening somewhere, right? Yes --- in the setter method, assuming the @property declaration declared it as retain. The code you cite above is a common idiom intended to funnel instance variable accesses through their proper accessor methods as opposed to accessing instance variables directly. Second question - is there anyway to see the code that gets generated by @synthesize? I'm nosy and curious. There's a few hints on how the accessors work (they work just fine, thank you) starting around page 50 of The Objective C 2.0 Programming Language document.In general, assume synthesised accessor methods will Do The Right Thing . . . Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
Re: NSInterger Infinity?
On Jun 18, 2009, at 10:39 AM, Chunk 1978 wrote: agreed. the reason i asked is because i saw this snippet of code: repeatCount = 1e100f; and i just though that seems awfully ambiguous and hoped for something a little more universal. Nothing ambiguous at all --- it's about 2 * 10 ^ 82 times the current estimated age of the Universe, and that ought to be Universal enough . . . On Thu, Jun 18, 2009 at 1:35 PM, WTjrca...@gmail.com wrote: On Jun 18, 2009, at 7:02 PM, Chunk 1978 wrote: i would like to set an AnimationRepeatCount to loop continuously. what is an appropriate number to set? You could use NSIntegerMax. Although finite, it's so large it might as well be considered infinitely large, in the context in question. I doubt any user will be running your application continuously for a long enough period of time to exhaust an entire animation cycle of that length. ___ 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 arch...@mail-archive.com
Re: Scaling an entire CGPath?
On Apr 22, 2009, at 11:25 AM, Maryanna Rogers wrote: This path will never be drawn. ~m On Wed, Apr 22, 2009 at 8:23 PM, David Duncan david.dun...@apple.com wrote: On Apr 22, 2009, at 10:54 AM, Maryanna Rogers wrote: I need to take a CGPath (a set of lines, curves, etc.) and scale the entire thing as a whole. Is there a simple way to do this? Do I need to use CGPathApply somehow? Typically you would just scale the context that you are drawing the path to... Without further information as to what you're trying to accomplish, we can't see what the real problem is. Making some assumptions: 1. If you are constructing the path yourself, surely simple multiplication of the path coordinates by the scale factor(s) prior to adding the specific element to the path should do the trick. 2. If you have been handed a path and need to scale it, you can use a Path Applier function in conjunction with CGPathApply to play back each element of the path.See CGPathApply, CGPathApplierFunction, and CGPathElement for further details. Cheers, . . . . . . . .Henry ___ 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 arch...@mail-archive.com
