Running Cocoa from a dynamic library
Dear community, I'm building a project I've been thinking about for 14 years now. Finally doing it. But I've hit a stumbling block... So I need help... I'm trying to wrap Ogre3D a graphics engine in a javascript api using v8, and then load that as a module in node js, a javascript framework focussed on web communication tasks such as running a server. Node js can load other javascript modules that are bound to C++ code as dynamic libraries. Ogre3D however, uses a cocoa window to render on, and obviously I want user input. But if I start ogre in a dynamic library ui events register incorrectly. Only clicks and drag operations are detected, but no key input or mouse move events. This only happens when I load the library dynamically. I know this because I created a simple program that just loaded my dynamic lib to test the assumption. If I don't load the lib dynamically, but link directly everything works fine. The answer is probably quite simple, once you know where to look, but I don't know where to look. So please help. Kind regards (: Guido ___ 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
Drawing text in a ImageAndTextCell in a nsoutlineview works as desired in Leopard. Broken in Snow Leopard and Lion
I'm having problems with code that works fine on Leopard, slightly
broken in Snow Leopard and even more so in Lion. In Leopard the
drawing of text in a selected cell with a colour label applied is
drawing white instead of black, if the selected cell is the first in a
list of items with a colour label applied. This also happens in Lion
but in Lion if a later item with a colour label is selected then the
text is drawn über black.
Correct behaviour in Leopard:
http://www.yvs.eu.com/files/Leopard.png
http://www.yvs.eu.com/files/Leopard2.png
Correct behaviour in Snow Leopard when it is not the first item with a
colour label selected:
http://www.yvs.eu.com/files/SnowLeopard2.png
Incorrect behaviour in Snow Leopard Lion when it is the first item
with a colour label selected:
http://www.yvs.eu.com/files/SnowLeopard3.png
Extra broken behaviour in Lion with the über black:
http://www.yvs.eu.com/files/Lion1.png
I have an NSOutlineView and I use a subclass of a view controller to
control it and to be its delegate.
I use a modified version of Apple's ImageAndTextCell class to draw
each item in the single column outline view. The image and text cell
class draws the image and a colour label where necessary like those
applied in Finder and then asks super (NSTextCell) to draw the text.
In the controller and delegate I have implemented the delegate method
where I set the colour label if necessary:
- (void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell
forTableColumn:(NSTableColumn *)tableColumn
item:(id)item
{
MYImageAndTextCell *imgTxtCell = cell;
MyNode *myNode = item;
// The if is strictly not necessary but highlights that the label
name is NULL when there is no label.
if ([myNode colourLabel])
[cell setLabelName:[myNode colourLabel]];
else
[cell setLabelName:NULL];
}
In the ImageAndTextCell I have gone over the top in trying to apply
the correct background style when I have a colour label applied
(NSBackgroundStyleLight which previously resulted in the text drawn
black). I have overridden interiorBackgroundStyle
drawWithFrame:cellFrame:inView and drawInteriorWithFrame:inView
- (NSBackgroundStyle)interiorBackgroundStyle
{
if ([self labelName])
return NSBackgroundStyleLight;
return [super interiorBackgroundStyle];
}
- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView*)controlView
{
if ([self labelName])
{
...
NSDrawThreePartImage(labelFrame, leftEndCapImage, middleImage,
rightEndCapImage, FALSE, NSCompositeSourceOver,
1.0, TRUE);
[self setBackgroundStyle:NSBackgroundStyleLight];
}
// super will draw the text
[super drawInteriorWithFrame:cellFrame inView:controlView];
}
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView*)controlView
{
// Carve up the cell so that part of the cell is the image, and
the other part is the text cell.
NSSize imageSize [[self image] size] ;
NSRect imageFrame;
NSRect textFrame;
NSDivideRect(cellFrame, imageFrame, textFrame, 5 +
imageSize.width, NSMinXEdge);
[[self image] compositeToPoint:imageFrame.origin
operation:NSCompositeSourceOver];
if ([self labelName])
[self setBackgroundStyle:NSBackgroundStyleLight];
[super drawWithFrame:textFrame inView:controlView];
}
What changed in snow leopard to override setting the background style
to NSBackgroundStyleLight for the first item and why do I get the über
black text in Lion? What am I doing wrong?
Kevin
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Drawing of text in outline view image and text cell correct in Leopard, broken in snow leopard
I'm having problems with code that works fine on Leopard, and broken in Snow
Leopard. In Leopard the drawing of text in a selected cell with a colour label
applied is drawing white instead of black, if the selected cell is the first in
a list of items with a colour label applied.
Correct behaviour in: Leopard
http://yvs.eu.com/files/Leopard.png
http://yvs.eu.com/files/Leopard2.png
Correct behaviour in Snow Leopard when it is not the first item with a colour
label selected:
http://yvs.eu.com/files/SnowLeopard2.png
I have an NSOutlineView and I use a subclass of a view controller to control it
and to be its delegate.
I use a modified version of Apple's ImageAndTextCell class to draw each item in
the single column outline view. The image and text cell class draws the image
and a colour label where necessary like those applied in Finder and then asks
super (NSTextCell) to draw the text.
In the controller and delegate I have implemented the delegate method where I
set the colour label if necessary:
- (void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell
forTableColumn:(NSTableColumn *)tableColumn
item:(id)item
{
MYImageAndTextCell *imgTxtCell = cell;
MyNode *myNode = item;
// The if is strictly not necessary but highlights that the label name is
NULL when there is no label.
if ([myNode colourLabel])
[cell setLabelName:[myNode colourLabel]];
else
[cell setLabelName:NULL];
}
In the ImageAndTextCell I have gone over the top in trying to apply the correct
background style when I have a colour label applied (NSBackgroundStyleLight
which previously resulted in the text drawn black). I have overridden
interiorBackgroundStyle drawWithFrame:cellFrame:inView and
drawInteriorWithFrame:inView
- (NSBackgroundStyle)interiorBackgroundStyle
{
if ([self labelName])
return NSBackgroundStyleLight;
return [super interiorBackgroundStyle];
}
- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView*)controlView
{
if ([self labelName])
{
...
NSDrawThreePartImage(labelFrame, leftEndCapImage, middleImage,
rightEndCapImage, FALSE, NSCompositeSourceOver,
1.0, TRUE);
[self setBackgroundStyle:NSBackgroundStyleLight];
}
// super will draw the text
[super drawInteriorWithFrame:cellFrame inView:controlView];
}
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView*)controlView
{
// Carve up the cell so that part of the cell is the image, and the other
part is the text cell.
NSSize imageSize [[self image] size] ;
NSRect imageFrame;
NSRect textFrame;
NSDivideRect(cellFrame, imageFrame, textFrame, 5 + imageSize.width,
NSMinXEdge);
[[self image] compositeToPoint:imageFrame.origin
operation:NSCompositeSourceOver];
if ([self labelName])
[self setBackgroundStyle:NSBackgroundStyleLight];
[super drawWithFrame:textFrame inView:controlView];
}
What changed in snow leopard to override setting the background style to
NSBackgroundStyleLight for the first item? What am I doing wrong?
ktam___
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Space-efficient saving for Versions?
Salutations, in my custom document package I'm always including a large-ish chunk of data that does not get modified as I change the document itself. Currently, I'm keeping this around as NSData-object and write it out when being asked by NSDocument to return my fileWrapper as one sub-file of the directory package. Can I do anything to make it more obvious to the Versions / autosave-mechanism that this file in the package is always the same? Or will it compare the files anyway and notice it's identical to the one used in the previous revision? Thanks, Daniel.___ 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
Keeping NSOutlineView always active?
Hi all, Is it possible to make NSOutlineView look always active, even if it's not the actual first responder? Similar to the way the sidebar appears in the Finder: the selection in sidebar always appears as active, even when you work with the actual window contents. Am I missing something obvious? Thanks, Leo ___ 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
Keeping NSOutlineView always active?
Hi all, Is it possible to make NSOutlineView look always active, even if it's not the actual first responder? Similar to the way the sidebar appears in the Finder: the selection in sidebar always appears as active, even when you work with the actual window contents. Am I missing something obvious? Thanks, Leo ___ 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: Keeping NSOutlineView always active?
Oops sorry - please ignore, just reposted as a separate thread. Leo On 7/28/11 4:09:38 AM, Leo wrote: Hi all, Is it possible to make NSOutlineView look always active, even if it's not the actual first responder? Similar to the way the sidebar appears in the Finder: the selection in sidebar always appears as active, even when you work with the actual window contents. Am I missing something obvious? Thanks, Leo ___ 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
UI like Transmission BT
Hi Guys, Which components of XCode 4 I should use in order to make an UI like the Transmission BT (http://www.transmissionbt.com/) I mean the part of downloads, one below the other, its like each download is a view, but I don't know how to put them one below the order, and how to make background color cycle. I was looking on Collection View, but after reading doc it don't really seems to feet for me, I just need something simpler, one below the other, scroll when its bigger than screen. Any hints please? --- Wilker Lúcio http://about.me/wilkerlucio/bio Kajabi Consultant +55 81 82556600 ___ 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: UI like Transmission BT
On 28 Jul 2011, at 10:16, Wilker wrote: Hi Guys, Which components of XCode 4 I should use in order to make an UI like the Transmission BT (http://www.transmissionbt.com/) Why don't you check yourself in the source-code: https://trac.transmissionbt.com/browser/trunk/macosx Daniel. ___ 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: UI like Transmission BT
On 28 Jul 2011, at 09:16, Wilker wrote: Hi Guys, Which components of XCode 4 I should use in order to make an UI like the Transmission BT (http://www.transmissionbt.com/) I mean the part of downloads, one below the other, its like each download is a view, but I don't know how to put them one below the order, and how to make background color cycle. I was looking on Collection View, but after reading doc it don't really seems to feet for me, I just need something simpler, one below the other, scroll when its bigger than screen. You have three options: 1) Restrict yourself to 10.7 and use NSTableView with NSViews instead of NSCells. 2) Code an NSCell for that – this can be pretty damn horrible as NSCells can't keep their own state internally, because they will get reused for other rows. 3) Write your own view for putting a bunch of other views one above each other. 1 is trivially easy, 3 is pretty easy, 2 is a nightmare waiting to happen and the reason that 1 exists. Bob___ 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: UI like Transmission BT
Thanks guys, I mean I will take the NSTableView + NSView solution, Mac users migrate fast and my software will still on first release, I mean its ok for me for early adopting it :) --- Wilker Lúcio http://about.me/wilkerlucio/bio Kajabi Consultant +55 81 82556600 On Thu, Jul 28, 2011 at 6:15 AM, Thomas Davie tom.da...@gmail.com wrote: On 28 Jul 2011, at 09:16, Wilker wrote: Hi Guys, Which components of XCode 4 I should use in order to make an UI like the Transmission BT (http://www.transmissionbt.com/) I mean the part of downloads, one below the other, its like each download is a view, but I don't know how to put them one below the order, and how to make background color cycle. I was looking on Collection View, but after reading doc it don't really seems to feet for me, I just need something simpler, one below the other, scroll when its bigger than screen. You have three options: 1) Restrict yourself to 10.7 and use NSTableView with NSViews instead of NSCells. 2) Code an NSCell for that – this can be pretty damn horrible as NSCells can't keep their own state internally, because they will get reused for other rows. 3) Write your own view for putting a bunch of other views one above each other. 1 is trivially easy, 3 is pretty easy, 2 is a nightmare waiting to happen and the reason that 1 exists. Bob ___ 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: UI like Transmission BT
On Jul 28, 2011, at 2:15 AM, Thomas Davie wrote: On 28 Jul 2011, at 09:16, Wilker wrote: Hi Guys, Which components of XCode 4 I should use in order to make an UI like the Transmission BT (http://www.transmissionbt.com/) I mean the part of downloads, one below the other, its like each download is a view, but I don't know how to put them one below the order, and how to make background color cycle. I was looking on Collection View, but after reading doc it don't really seems to feet for me, I just need something simpler, one below the other, scroll when its bigger than screen. You have three options: 1) Restrict yourself to 10.7 and use NSTableView with NSViews instead of NSCells. I vote for this option. corbin ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Space-efficient saving for Versions?
The Versions store will do this automatically. It can detect when blocks of a file have been duplicated and avoid storing those blocks on disk. On Jul 28, 2011, at 12:37 AM, Daniel Vollmer wrote: Salutations, in my custom document package I'm always including a large-ish chunk of data that does not get modified as I change the document itself. Currently, I'm keeping this around as NSData-object and write it out when being asked by NSDocument to return my fileWrapper as one sub-file of the directory package. Can I do anything to make it more obvious to the Versions / autosave-mechanism that this file in the package is always the same? Or will it compare the files anyway and notice it's identical to the one used in the previous revision? Thanks, Daniel.___ 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/kperry%40apple.com This email sent to kpe...@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/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Running Cocoa from a dynamic library
On Jul 27, 2011, at 8:02 AM, Guido Sales Calvano wrote: Ogre3D however, uses a cocoa window to render on, and obviously I want user input. But if I start ogre in a dynamic library ui events register incorrectly. It’s not the fact that it’s in a dynamic library that causes trouble (for example, all system frameworks are in dynamic libraries!) It’s the fact that you’re starting a generic Unix process (node.js server) and then trying to turn it into a GUI app by calling AppKit in it, without going through the usual AppKit initialization (NSApplicationMain). However, I don’t think calling NSApplicationMain is the right thing for you to do, because (a) it expects to be the first thing called when the process starts, and (b) it will take over the main thread. I know that this can be done, though I don’t know the details of how. But hopefully this will get you looking closer to the right place, or nudge people who do know more to provide some answers. —Jens smime.p7s Description: S/MIME cryptographic signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Running Cocoa from a dynamic library
You might try NPAPI, it is designed to let you draw on a surface and get events Your plugin runs in a separate process, and is scriptable by javascript best bill On Wed, Jul 27, 2011 at 8:02 AM, Guido Sales Calvano guidocalv...@yahoo.com wrote: Dear community, I'm building a project I've been thinking about for 14 years now. Finally doing it. But I've hit a stumbling block... So I need help... I'm trying to wrap Ogre3D a graphics engine in a javascript api using v8, and then load that as a module in node js, a javascript framework focussed on web communication tasks such as running a server. Node js can load other javascript modules that are bound to C++ code as dynamic libraries. Ogre3D however, uses a cocoa window to render on, and obviously I want user input. But if I start ogre in a dynamic library ui events register incorrectly. Only clicks and drag operations are detected, but no key input or mouse move events. This only happens when I load the library dynamically. I know this because I created a simple program that just loaded my dynamic lib to test the assumption. If I don't load the lib dynamically, but link directly everything works fine. The answer is probably quite simple, once you know where to look, but I don't know where to look. So please help. Kind regards (: Guido ___ 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/billappleton%40dreamfactory.com This email sent to billapple...@dreamfactory.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
Filter an array
I have an array of file paths, and I need to filter them to return only files
with extensions I have in another array. So any files that end with {.tif,
.png, .eps} etc.
I'm looking at using: - (NSArray
*)filteredArrayUsingPredicate:(NSPredicate *)predicate
Is this the best option for this kind of filter? Is there any other way, aside
from doing it the long long way, i.e. enumerating over each's item's
pathExtension in array1 through each file extension in array2?
Thanks,
Chris
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Re: NSFileManager - a cautionary tale
On Jul 26, 2011, at 6:51 PM, Graham Cox wrote: On 27/07/2011, at 11:14 AM, Graham Cox wrote: However, this method eventually calls mkdir, which fails with an error if the directory already exists. This call to mkdir causes the App Store reviewers to have conniptions, even though it certainly fails. The failure of mkdir is interpreted by NSFileManager as a success (i.e. the method apparently works by attempting the mkdir, rather than checking for its existence beforehand). Did you file a bug report? Another thing to mention - we run this code during app launch, so we didn't see it in fs_usage, which requires that the process it's peeking at is running already. I'm not sure if there is a way to observe file system stuff during launch - if anyone knows, please let me know! Run in a debugger with a breakpoint at the top of main(). When you hit the breakpoint, start on fs_usage and continue. If you need to catch something that runs before main(), try a breakpoint on something low-level like malloc() and disable it after it hits the first time. -- Greg Parker gpar...@apple.com Runtime Wrangler ___ 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: Filter an array
On Thu, Jul 28, 2011 at 1:35 PM, Chris Paveglio
chris_paveg...@yahoo.com wrote:
I have an array of file paths, and I need to filter them to return only files
with extensions I have in another array. So any files that end with {.tif,
.png, .eps} etc.
I'm looking at using: - (NSArray
*)filteredArrayUsingPredicate:(NSPredicate *)predicate
Is this the best option for this kind of filter? Is there any other way,
aside from doing it the long long way, i.e. enumerating over each's item's
pathExtension in array1 through each file extension in array2?
Actually, the long way might be your best bet after all.
You could use -[NSArray indexesOfObjectsWithOptions:passingTest:] to
enlist GCD to do a parallel filtering of all your strings:
// warning: typed in mail client
NSArray *validExtensions = [NSArray arrayWithObjects:@.tif, @.png,
@.eps, nil];
NSIndexSet *indexes = [myFilePaths
indexesOfObjectsWithOptions:NSEnumerationConcurrent passingTest:^(id
obj, NSUInteger idx, BOOL *stop) {
NSString *filePath = (NSString *)obj;
for (NSString *extension in validExtensions) {
if ([[string pathExtension] isEqualToString:extension])
return YES;
}
return NO;
}];
NSArray *filteredPaths = [myFilePaths objectsAtIndexes:indexes];
--Kyle Sluder
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Re: Filter an array
Oh, I don't know how I missed this, but there's a very convenient
-[NSArray pathsMatchingExtensions:] method already declared in
NSPathUtilities.h:
http://developer.apple.com/library/mac/documentation/cocoa/reference/foundation/Classes/NSArray_Class/NSArray.html#//apple_ref/doc/uid/2137-BBCHHAJJ
So your entire problem boils down to one method call.
--Kyle Sluder
On Thu, Jul 28, 2011 at 1:45 PM, Kyle Sluder kyle.slu...@gmail.com wrote:
On Thu, Jul 28, 2011 at 1:35 PM, Chris Paveglio
chris_paveg...@yahoo.com wrote:
I have an array of file paths, and I need to filter them to return only
files with extensions I have in another array. So any files that end with
{.tif, .png, .eps} etc.
I'm looking at using: - (NSArray
*)filteredArrayUsingPredicate:(NSPredicate *)predicate
Is this the best option for this kind of filter? Is there any other way,
aside from doing it the long long way, i.e. enumerating over each's item's
pathExtension in array1 through each file extension in array2?
Actually, the long way might be your best bet after all.
You could use -[NSArray indexesOfObjectsWithOptions:passingTest:] to
enlist GCD to do a parallel filtering of all your strings:
// warning: typed in mail client
NSArray *validExtensions = [NSArray arrayWithObjects:@.tif, @.png,
@.eps, nil];
NSIndexSet *indexes = [myFilePaths
indexesOfObjectsWithOptions:NSEnumerationConcurrent passingTest:^(id
obj, NSUInteger idx, BOOL *stop) {
NSString *filePath = (NSString *)obj;
for (NSString *extension in validExtensions) {
if ([[string pathExtension] isEqualToString:extension])
return YES;
}
return NO;
}];
NSArray *filteredPaths = [myFilePaths objectsAtIndexes:indexes];
--Kyle Sluder
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Re: Filter an array
Oh, I don't know how I missed this, but there's a very convenient
-[NSArray pathsMatchingExtensions:] method already declared in
NSPathUtilities.h:
http://developer.apple.com/library/mac/documentation/cocoa/reference/foundation/Classes/NSArray_Class/NSArray.html#//apple_ref/doc/uid/2137-BBCHHAJJ
So your entire problem boils down to one method call.
The docs don't state whether it's case sensitive or not. It also takes the
list as an NSArray rather than an NSSet, which is suboptimal.
// warning: typed in mail client
NSArray *validExtensions = [NSArray arrayWithObjects:@.tif, @.png,
@.eps, nil];
NSIndexSet *indexes = [myFilePaths
indexesOfObjectsWithOptions:NSEnumerationConcurrent passingTest:^(id
obj, NSUInteger idx, BOOL *stop) {
NSString *filePath = (NSString *)obj;
for (NSString *extension in validExtensions) {
if ([[string pathExtension] isEqualToString:extension])
return YES;
}
If you were to go this approach, which I wouldn't recommend given the existence
of the convenience method above (assuming it's properly case-insensitive), do:
1) Use caseInsensitiveCompare:, not isEqualToString:.
2) Consider using an NSSet for the set of accepted extensions (though that will
mean ensuring they're all e.g. lowercase, both when inserting the accepted
values into the set and prior to checking for set membership).
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Re: Filter an array
Further to earlier answers, bear in mind you've got no guarantee that file
extensions are correct, or even exist. Plus of course, you might have both .jpg
and .jpeg. You might well be better iterating through, finding the UTI of each
file, and working from that.
On 28 Jul 2011, at 21:35, Chris Paveglio wrote:
I have an array of file paths, and I need to filter them to return only files
with extensions I have in another array. So any files that end with {.tif,
.png, .eps} etc.
I'm looking at using: - (NSArray *)filteredArrayUsingPredicate:(NSPredicate
*)predicate
Is this the best option for this kind of filter? Is there any other way,
aside from doing it the long long way, i.e. enumerating over each's item's
pathExtension in array1 through each file extension in array2?
Thanks,
Chris
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Return causes EXC_BAD_ACCESS
I am unable to find out as to why I am receiving this problem, I can verify
other parts of the code before it gets to the return and that the object I am
returning does in-fact work as I am able to NSLog it and see the description of
it. The basic idea of this code is to notify other objects to see if one exists
with the same path and if it does, it will tell the object I am using to check
where it is at by setFoundCookieJar:self. It seems to work, as I can see the
value when logging it. This one problem is stopping the code I wrote from being
usable.
If someone can explain why this is happening and give me a link to explanation
on this signal and why it occurs as I have and a friend of mine has seen it in
weird areas that seems like it should work from an understand of the code and
playing around seems like it will work by logging out information. From my
understanding, this should happen when you, for an example, try to access the
pointer 0x18c95b0 whenever that belongs to another process. However, I also
thought that the Mac has a copy of memory space for each process and therefore
should not be able to access memory that it doesn't own unless the core os does
so.
[notificationCenter postNotificationName:MGMCookieJarExists object:self
userInfo:[NSDictionary dictionaryWithObject:cookiesPath
forKey:MGMCookieJarKey]];
if (foundCookieJar!=nil) {
[self release];
self = nil;
return foundCookieJar;
}
Thanks for any help on this issue,
Mr. Gecko___
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Re: Return causes EXC_BAD_ACCESS
It kind of looks like foundCookieJar is an ivar, which means that return
foundCookieJar is really going to be return self-foundCookieJar. Since you
set self to nil, you're trying to dereference a NULL pointer, which is a
great way to crash your app.
HTH,
Dave
On Jul 28, 2011, at 2:33 PM, Mr. Gecko wrote:
I am unable to find out as to why I am receiving this problem, I can verify
other parts of the code before it gets to the return and that the object I am
returning does in-fact work as I am able to NSLog it and see the description
of it. The basic idea of this code is to notify other objects to see if one
exists with the same path and if it does, it will tell the object I am using
to check where it is at by setFoundCookieJar:self. It seems to work, as I can
see the value when logging it. This one problem is stopping the code I wrote
from being usable.
If someone can explain why this is happening and give me a link to
explanation on this signal and why it occurs as I have and a friend of mine
has seen it in weird areas that seems like it should work from an understand
of the code and playing around seems like it will work by logging out
information. From my understanding, this should happen when you, for an
example, try to access the pointer 0x18c95b0 whenever that belongs to another
process. However, I also thought that the Mac has a copy of memory space for
each process and therefore should not be able to access memory that it
doesn't own unless the core os does so.
[notificationCenter postNotificationName:MGMCookieJarExists object:self
userInfo:[NSDictionary dictionaryWithObject:cookiesPath
forKey:MGMCookieJarKey]];
if (foundCookieJar!=nil) {
[self release];
self = nil;
return foundCookieJar;
}
Thanks for any help on this issue,
Mr. Gecko___
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Re: Return causes EXC_BAD_ACCESS
That makes lots of sense, never even expected that to happen. Adding a local variable and setting it to the value before releasing it and returning that variable fixes the issue. I am still looking to an link to explanation in detail as to why this happens. If it's as I said, then I do not think I need it. On Jul 28, 2011, at 4:35 PM, Dave DeLong wrote: It kind of looks like foundCookieJar is an ivar, which means that return foundCookieJar is really going to be return self-foundCookieJar. Since you set self to nil, you're trying to dereference a NULL pointer, which is a great way to crash your app. HTH, Dave ___ 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: Return causes EXC_BAD_ACCESS
On Thu, Jul 28, 2011 at 2:45 PM, Mr. Gecko grmrge...@gmail.com wrote: That makes lots of sense, never even expected that to happen. Adding a local variable and setting it to the value before releasing it and returning that variable fixes the issue. I am still looking to an link to explanation in detail as to why this happens. If it's as I said, then I do not think I need it. There's a very strong but unwritten expectation that self remains valid for the entirety of a method implementation, except possibly in -init. ARC enforces this restriction: self is const in all non-init methods. I'm not sure what your motivation is for calling [self release] here, but no code should be doing this. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Return causes EXC_BAD_ACCESS
Well, let's think about it. Instance variables are only accessible as long as you have an instance, right? You can't have an instance variable without an instance. So if you set self to nil... then you no longer have an instance. Thus, you cannot access self's instance variables, because there is no self. Sorry I don't have a doc link for you; perhaps someone more well-versed with the documentation search tools than I can find something relevant. :) Dave On Jul 28, 2011, at 2:45 PM, Mr. Gecko wrote: That makes lots of sense, never even expected that to happen. Adding a local variable and setting it to the value before releasing it and returning that variable fixes the issue. I am still looking to an link to explanation in detail as to why this happens. If it's as I said, then I do not think I need it. On Jul 28, 2011, at 4:35 PM, Dave DeLong wrote: It kind of looks like foundCookieJar is an ivar, which means that return foundCookieJar is really going to be return self-foundCookieJar. Since you set self to nil, you're trying to dereference a NULL pointer, which is a great way to crash your app. HTH, Dave ___ 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: Return causes EXC_BAD_ACCESS
On Jul 28, 2011, at 3:33 PM, Mr. Gecko wrote: From my understanding, this should happen when you, for an example, try to access the pointer 0x18c95b0 whenever that belongs to another process. However, I also thought that the Mac has a copy of memory space for each process and therefore should not be able to access memory that it doesn't own unless the core os does so. No, not even close. It happens when you access a memory address that has not been mapped into your process' memory space. I've given you plenty of terms to google; go for it. -- Scott Ribe scott_r...@elevated-dev.com http://www.elevated-dev.com/ (303) 722-0567 voice ___ 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: Running Cocoa from a dynamic library
On Thu, Jul 28, 2011 at 1:14 PM, Jens Alfke j...@mooseyard.com wrote: On Jul 27, 2011, at 8:02 AM, Guido Sales Calvano wrote: Ogre3D however, uses a cocoa window to render on, and obviously I want user input. But if I start ogre in a dynamic library ui events register incorrectly. It’s not the fact that it’s in a dynamic library that causes trouble (for example, all system frameworks are in dynamic libraries!) It’s the fact that you’re starting a generic Unix process (node.js server) and then trying to turn it into a GUI app by calling AppKit in it, without going through the usual AppKit initialization (NSApplicationMain). However, I don’t think calling NSApplicationMain is the right thing for you to do, because (a) it expects to be the first thing called when the process starts, and (b) it will take over the main thread. I know that this can be done, though I don’t know the details of how. But hopefully this will get you looking closer to the right place, or nudge people who do know more to provide some answers. NSApplicationLoad()? Although that's meant to be called from Carbon applications. I don't know that command line applications will work at all. ___ 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: NSFileManager - a cautionary tale
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 7/28/11 2:05 PM, wadesli...@mac.com wrote: sudo fs_usage | grep process name No need to use grep... you can just: sudo fs_usage process name (This is similar to the redundant cat some file | grep foo) - -- Conrad Shultz Synthetiq Solutions www.synthetiqsolutions.com -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iD8DBQFOMeQoaOlrz5+0JdURAk2oAJ9pVF5JFeiYHWE1G/p4brMUh9sJaACdHlNo nGubPfAtm+mjQqAaUjYeOec= =PeSQ -END PGP SIGNATURE- ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Calculations in a tableview
Hi, For example, lets say I have a tableview with 3 columns: quantity, unit price and total. I want to calculate total using (quantity * unit price). Pretty simple using a datasource but I've no idea how to do that with bindings (using an NSArrayController). Any pointer to an example of this would be greatly appreciated. Thanks, Andre Masse ___ 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: Calculations in a tableview
On 28 Jul 2011, at 23:48, Andre Masse wrote: Hi, For example, lets say I have a tableview with 3 columns: quantity, unit price and total. I want to calculate total using (quantity * unit price). Pretty simple using a datasource but I've no idea how to do that with bindings (using an NSArrayController). Any pointer to an example of this would be greatly appreciated. To be honest, this, along with the many debugging issues of bindings is exactly why I still use data sources. Bob___ 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: Return causes EXC_BAD_ACCESS
On Jul 28, 2011, at 3:00 PM, Kyle Sluder wrote: I'm not sure what your motivation is for calling [self release] here, but no code should be doing this. I disagree. There are a couple of reasons to call this: - It’s pat of the failure path for -init methods. Before returning nil you need to call [self release] to avoid leaking. - An object that performs some asynchronous task may want to retain itself when starting the task, and release itself when done, to make sure it won’t get dealloced before the task finishes. Mr. Gecko wrote: I am still looking to an link to explanation in detail as to why this happens If ‘foundCookieJar’ is an instance variable, than any time you refer to it in a method, the compiler actually implements it as “self-foundCookieJar”. From that, it should be pretty clear that if you set self to nil, the next reference to ‘self-foundCookieJar’ is a nil pointer access that’s going to crash. —Jens smime.p7s Description: S/MIME cryptographic signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: UI like Transmission BT
I'm trying a lot to make the NSTableView + NSView but I just can't make it work... I don't know the way to go, I was reading this doc here: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/TableView/ViewBasedTables/ViewBasedTables.html#//apple_ref/doc/uid/1026i-CH15-SW2 But it don't explains too much... I created an xib file for my view, but I don't know how to load it to be cell of the view... The doc says to use a CustomView component inside cell, I dropped one, but I can't see how to link it with my xib. You have any good tutorial about it guys? --- Wilker Lúcio http://about.me/wilkerlucio/bio Kajabi Consultant +55 81 82556600 On Thu, Jul 28, 2011 at 1:30 PM, Corbin Dunn corb...@apple.com wrote: On Jul 28, 2011, at 2:15 AM, Thomas Davie wrote: On 28 Jul 2011, at 09:16, Wilker wrote: Hi Guys, Which components of XCode 4 I should use in order to make an UI like the Transmission BT (http://www.transmissionbt.com/) I mean the part of downloads, one below the other, its like each download is a view, but I don't know how to put them one below the order, and how to make background color cycle. I was looking on Collection View, but after reading doc it don't really seems to feet for me, I just need something simpler, one below the other, scroll when its bigger than screen. You have three options: 1) Restrict yourself to 10.7 and use NSTableView with NSViews instead of NSCells. I vote for this option. corbin ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Filter an array
On Jul 28, 2011, at 1:35 PM, Chris Paveglio wrote:
I'm looking at using: - (NSArray *)filteredArrayUsingPredicate:(NSPredicate
*)predicate
I was going to suggest using a block to filter, but it seems that Foundation
collections still don’t implement the standard functional operators like ‘map’
and ‘filter' found in lots of other languages. Which is too bad, since
otherwise you could write it compactly as
NSArray* filtered = [paths filter: ^(NSString path){
return [validExtensions containsObject:
path.pathExtension.lowercaseString];
}];
There’s -indexesOfObjectsWithOptions:passingTest:, as Kyle pointed out, but
that adds another step of generating and using an index-set.
I found the lack of -map so annoying that I wrote a category method for it in
my current project...
—Jens
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Re: UI like Transmission BT
Sorry guys, my bad... I tried to create a View Controller class by extending from NSView instead of NSViewController... Now its running fine :) Just one last question, I'm using a table with a single column, how I make this column fill 100% of table and follow the table size (in case of table growl or reduce)? --- Wilker Lúcio http://about.me/wilkerlucio/bio Kajabi Consultant +55 81 82556600 On Thu, Jul 28, 2011 at 8:14 PM, Wilker wilkerlu...@gmail.com wrote: I'm trying a lot to make the NSTableView + NSView but I just can't make it work... I don't know the way to go, I was reading this doc here: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/TableView/ViewBasedTables/ViewBasedTables.html#//apple_ref/doc/uid/1026i-CH15-SW2 But it don't explains too much... I created an xib file for my view, but I don't know how to load it to be cell of the view... The doc says to use a CustomView component inside cell, I dropped one, but I can't see how to link it with my xib. You have any good tutorial about it guys? --- Wilker Lúcio http://about.me/wilkerlucio/bio Kajabi Consultant +55 81 82556600 On Thu, Jul 28, 2011 at 1:30 PM, Corbin Dunn corb...@apple.com wrote: On Jul 28, 2011, at 2:15 AM, Thomas Davie wrote: On 28 Jul 2011, at 09:16, Wilker wrote: Hi Guys, Which components of XCode 4 I should use in order to make an UI like the Transmission BT (http://www.transmissionbt.com/) I mean the part of downloads, one below the other, its like each download is a view, but I don't know how to put them one below the order, and how to make background color cycle. I was looking on Collection View, but after reading doc it don't really seems to feet for me, I just need something simpler, one below the other, scroll when its bigger than screen. You have three options: 1) Restrict yourself to 10.7 and use NSTableView with NSViews instead of NSCells. I vote for this option. corbin ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
drawRect not getting called problem solved
I appreciate all the comments on the problem I had with drawRect not getting called. I finally extracted the code that was not working and put it in a new program, and it worked perfectly. I'm still not sure whether there was a problem in my code or if I unearthed a problem in Cocoa, but I'm now adding the rest of the original program to the new program, and the graphics are working. I understand that people who program in only one environment want to see code that matches the way they learned to program. That causes problems for those of us who work in multiple environments, some of which have a whole different set of rules. However, maybe it's a sign that software development is still at an early stage that some environments insist on Data and others insist on data. I do think it's important to keep in mind the difference between code and data, and some of the suggestions I got seemed to show some lack of clarity in that area. Confusing the two may work in certain specific environments, but it reflects a misunderstanding of the way computers actually work. I think it's important to have an awareness of the difference. Thanks again for your help. ___ 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: drawRect not getting called problem solved
On Jul 28, 2011, at 5:31 PM, Tom Jeffries wrote: I do think it's important to keep in mind the difference between code and data, and some of the suggestions I got seemed to show some lack of clarity in that area. Confusing the two may work in certain specific environments, but it reflects a misunderstanding of the way computers actually work. I think it's important to have an awareness of the difference. Code and data interact in different ways at different levels, and the distinction isn’t always clear-cut. In some languages it’s very blurry indeed (LISP, shell scripts, machine code). Object-oriented languages have specific ways code and data combine, functional languages have others. It sounded from some of your earlier messages* like you may not be used to object-oriented languages (or maybe just used to very rigid ones like C++ or Java), so some things you interpreted as unclear might just reflect a different way of thinking than you’re used to. —Jens *(In particular, it seemed like you were using ‘function’ and ‘variable’ in ways that didn’t reflect what was actually going on in the program) smime.p7s Description: S/MIME cryptographic signature ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Calculations in a tableview
Well, I may end up doing this… Thanks Andre Masse On 28/07/2011, at 18:52 , Thomas Davie wrote: On 28 Jul 2011, at 23:48, Andre Masse wrote: Hi, For example, lets say I have a tableview with 3 columns: quantity, unit price and total. I want to calculate total using (quantity * unit price). Pretty simple using a datasource but I've no idea how to do that with bindings (using an NSArrayController). Any pointer to an example of this would be greatly appreciated. To be honest, this, along with the many debugging issues of bindings is exactly why I still use data sources. Bob ___ 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: drawRect not getting called problem solved
On 29/07/2011, at 10:31 AM, Tom Jeffries wrote: I do think it's important to keep in mind the difference between code and data, and some of the suggestions I got seemed to show some lack of clarity in that area. Confusing the two may work in certain specific environments, but it reflects a misunderstanding of the way computers actually work. I think it's important to have an awareness of the difference. I'm not quite sure what you're referring to with this comment - looking back over the replies in the (former) thread about this doesn't make it very clear. But if you are referring to object-oriented programming in general, where objects are code + data combined, you are swimming upstream there. All OOP environments, languages really, start here - it's easier to program if code and data are combined and not kept separate. This is reflected in the fact that no major new language written post-early 80s uses a procedural approach rather than an object-oriented one. It doesn't matter how computers really work, what's important is having a usable abstraction that a programmer can use to be productive, and so far, OOP is proving to be immensely successful by that criterion. But, computers really don't work by separating code and data anyway - the whole Von-Neumann architecture that is just about every computer ever built was a breakthrough precisely because it stopped treating code and data as two different kinds of things and lumped them all together. If your comment is more to do with the division of labour between different objects within your design, then sure, it's possible to go ahead and make a real mess if you aren't methodical. But Cocoa in particular is very conscientious when it comes to reinforcing the 'Model-View-Controller' (MVC) stratum, and every Cocoa developer is wise to follow its example. --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/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Return causes EXC_BAD_ACCESS
On 29/07/2011, at 7:33 AM, Mr. Gecko wrote: From my understanding, this should happen when you, for an example, try to access the pointer 0x18c95b0 whenever that belongs to another process. No. Memory is virtual, the addresses you appear to be working with are not real (i.e. they don't refer to the real address of the physical RAM underneath). Instead, a bit of hardware translates these to the real addresses as needed at some level far below the perception of your program. You cannot access the virtual address space of any other process other than your own. --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/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Freaking out a bit...
applicationWillFinishLaunching: and applicationDidFinishLaunching: are not getting called. I checked the spelling, going so far as to copy and paste from documentation to code. (It worked pre-OS X 10.7). I made sure the delegate was set by NSLogging it. I even added the formal protocol tag. To top it off, my application is just opening the last document I used. I'm guessing that has something to do with the pList.lockfile. How do I get the delegate methods to fire normally and how do I prevent this auto restore behavior? Tony ___ 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: Calculations in a tableview
Try value transformers Thanks Rajendran P On 7/29/11 6:18 AM, Andre Masse andre.ma...@videotron.ca wrote: Well, I may end up doing this... Thanks Andre Masse On 28/07/2011, at 18:52 , Thomas Davie wrote: On 28 Jul 2011, at 23:48, Andre Masse wrote: Hi, For example, lets say I have a tableview with 3 columns: quantity, unit price and total. I want to calculate total using (quantity * unit price). Pretty simple using a datasource but I've no idea how to do that with bindings (using an NSArrayController). Any pointer to an example of this would be greatly appreciated. To be honest, this, along with the many debugging issues of bindings is exactly why I still use data sources. Bob ___ 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/rpichaim%40juniper.net This email sent to rpich...@juniper.net ___ 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: Calculations in a tableview
On Jul 28, 2011, at 15:48, Andre Masse wrote:
For example, lets say I have a tableview with 3 columns: quantity, unit price
and total. I want to calculate total using (quantity * unit price). Pretty
simple using a datasource but I've no idea how to do that with bindings
(using an NSArrayController).
Well, that's the problem right there. You seem to think bindings have something
to do with array controllers. They don't. (Bindings and array controllers are
often used together, of course, both on the content side of the array
controller and on the arrangedObjects side, but that's just a case of two
things being used to complement each other.)
When working with bindings, it helps to be very diligent in thinking in terms
of properties.
If you're supplying a table view's cells via bindings, then you must have a
model property for *each* column. In your case, your data model is (or
includes) an array property (say, invoiceItems), whose elements are objects
(of class, say, InvoiceItem) with properties quantity, unitPrice and
totalPrice.
If the total is always calculated from the other two properties, it is
typically a derived property (one whose value is derived on the fly, rather
than actually stored), but aside from that implementation detail, there's no
difference in how you use the properties to populate your table.
In code terms, the short answer to your question is:
+ (NSSet) keyPathsForValuesAffectingTotalPrice {
return [NSSet setWithObjects: @quantity, @unitPrice, nil];
}
- (NSInteger) totalPrice { // or whatever the correct data type is
return self.quantity * self.unitPrice;
}
The second method provides the derived property value. The first method
provides KVO compliance.
So how does the array controller enter this picture at all? It's a glue object
(aka mediating controller) whose function is to sort and filter the model
array property. It has no role in sourcing actual data to your table***.
*** It's certainly possible to *give* it a role, but I would argue that this is
a terrible idea.
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Re: Calculations in a tableview
Hi, On 29 Jul 11, at 10:51am, cocoa-dev-requ...@lists.apple.com wrote: For example, lets say I have a tableview with 3 columns: quantity, unit price and total. I want to calculate total using (quantity * unit price). Pretty simple using a datasource but I've no idea how to do that with bindings (using an NSArrayController). Any pointer to an example of this would be greatly appreciated. (Using Core Data with tables) I just write a method to calculate quantity * price and then bind the third column to that. Cheers, Steve___ 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: Lion doesn't like tricky.key.paths in bindings?
On 2011 Jul 24, at 09:05, Clark Cox wrote: Well, is the suggestion correct? That is, is there any way that the value of barDate could have changed without sending the appropriate KVO notification (did you, for example change the value of barDate without going through the setter?) Thank you, Clark. I've looked at and searched the code quite a bit, and am confident that I'm not accessing instance variables directly. And there is definitely something different in Lion. Has anyone else been successful binding to tricky.key.paths in Lion? By tricky, I mean that the last word in the key path is not an attribute but is in fact a method which formats a number or date into a string. Example of a tricky key path: someDateAttributeKey.someFormattingMethod where someDateAttributeKey is an attribute whose value is an NSDate -someFormattingMethod is a method defined in a category of NSDate which returns a NSString. ___ 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
A trap with full screen in Lion
I just came across a bit of an issue with the full screen mode in Lion: if you have a view and use [[self window] windowController] to get at your window controller, it will return nil in full screen mode. The window gets swapped out with an NSToolbarFullScreenWindow, which doesn't have a window controller set. I haven't checked but assume this will also apply to things like delegates etc too. And if you were relying on something in a custom NSWindow subclass, that would be gone... I have found that [[NSApp mainWindow] windowController] returns the right thing, which is sufficient for my needs at the moment, seeing as it's UI level and working on the current document. I don't know whether there are any other issues with the full window but I thought it would be interesting to bring up this issue for discussion in case there are further implications. Regards Gideon ___ 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: Lion doesn't like tricky.key.paths in bindings?
On Thu, Jul 28, 2011 at 7:20 PM, Jerry Krinock je...@ieee.org wrote: Well, is the suggestion correct? That is, is there any way that the value of barDate could have changed without sending the appropriate KVO notification (did you, for example change the value of barDate without going through the setter?) Thank you, Clark. I've looked at and searched the code quite a bit, and am confident that I'm not accessing instance variables directly. And there is definitely something different in Lion. Has anyone else been successful binding to tricky.key.paths in Lion? By tricky, I mean that the last word in the key path is not an attribute but is in fact a method which formats a number or date into a string. Example of a tricky key path: If you're not returning precisely the same NSString instance every time KVO thinks you should, then you are violating the rules and KVO has every right to complain. KVO doesn't do an -isEqual: on the result of your method. It does pointer equality. Something changed on Lion that causes it to now care that the return value of your method stays constant when it should. If you want to use a transformer-type method, you implement +keyPathsForValuesAffectingYourCleverProperty appropriately, that way KVO knows when to ask for a pointer to a new NSString instance. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Freaking out a bit...
On Thu, Jul 28, 2011 at 6:20 PM, John Cate tonyc...@me.com wrote: applicationWillFinishLaunching: and applicationDidFinishLaunching: are not getting called. I checked the spelling, going so far as to copy and paste from documentation to code. (It worked pre-OS X 10.7). I made sure the delegate was set by NSLogging it. I even added the formal protocol tag. To top it off, my application is just opening the last document I used. I'm guessing that has something to do with the pList.lockfile. Why would it have anything to do with the plist lockfile? You are experiencing the new Transparent Application Lifecycle and Restore functions of Lion. You will need to update your application to deal with them. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: A trap with full screen in Lion
Sorry - missed an important bit of info - this applies for a view that is in the toolbar. So far as I am aware, it doesn't apply to views in your main window (at least my views in my main window still appear to always return the right thing). On 29/07/2011, at 12:38 PM, Gideon King wrote: I just came across a bit of an issue with the full screen mode in Lion: if you have a view and use [[self window] windowController] to get at your window controller, it will return nil in full screen mode. The window gets swapped out with an NSToolbarFullScreenWindow, which doesn't have a window controller set. I haven't checked but assume this will also apply to things like delegates etc too. And if you were relying on something in a custom NSWindow subclass, that would be gone... I have found that [[NSApp mainWindow] windowController] returns the right thing, which is sufficient for my needs at the moment, seeing as it's UI level and working on the current document. I don't know whether there are any other issues with the full window but I thought it would be interesting to bring up this issue for discussion in case there are further implications. Regards Gideon ___ 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: Calculations in a tableview
Thanks a lot for the clarifications about the role of the NSArrayController. I
somehow got confused about the whole binding thing, its not so muddy now. Now,
the example I gave was a bad simplification of the real thing as the
totalPrice is more a proposedTotalPrice. It's based on a calculation but
can/will be changed by the user.
So, what I need is a way to calculate a property, but let the user change it if
he wants. For example, having 3 values a, b and c (a + b = c). The user
enters a value for a or b, then c is calculated. If the user changes c,
it now lose its dependance on a and b. This would be easy if the 3 values
were in an NSTextField instead of a tableview as I could add an action to the
first 2 fields and none to the third.
Is this can be done using bindings or should I stop fighting the framework and
and use a datasource?
Thanks,
Andre Masse
On 28/07/2011, at 22:13 , Quincey Morris wrote:
On Jul 28, 2011, at 15:48, Andre Masse wrote:
For example, lets say I have a tableview with 3 columns: quantity, unit
price and total. I want to calculate total using (quantity * unit price).
Pretty simple using a datasource but I've no idea how to do that with
bindings (using an NSArrayController).
Well, that's the problem right there. You seem to think bindings have
something to do with array controllers. They don't. (Bindings and array
controllers are often used together, of course, both on the content side of
the array controller and on the arrangedObjects side, but that's just a
case of two things being used to complement each other.)
When working with bindings, it helps to be very diligent in thinking in terms
of properties.
If you're supplying a table view's cells via bindings, then you must have a
model property for *each* column. In your case, your data model is (or
includes) an array property (say, invoiceItems), whose elements are objects
(of class, say, InvoiceItem) with properties quantity, unitPrice and
totalPrice.
If the total is always calculated from the other two properties, it is
typically a derived property (one whose value is derived on the fly, rather
than actually stored), but aside from that implementation detail, there's no
difference in how you use the properties to populate your table.
In code terms, the short answer to your question is:
+ (NSSet) keyPathsForValuesAffectingTotalPrice {
return [NSSet setWithObjects: @quantity, @unitPrice, nil];
}
- (NSInteger) totalPrice { // or whatever the correct data type is
return self.quantity * self.unitPrice;
}
The second method provides the derived property value. The first method
provides KVO compliance.
So how does the array controller enter this picture at all? It's a glue
object (aka mediating controller) whose function is to sort and filter the
model array property. It has no role in sourcing actual data to your table***.
*** It's certainly possible to *give* it a role, but I would argue that this
is a terrible idea.
___
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Re: Calculations in a tableview
On Jul 28, 2011, at 20:00, Andre Masse wrote: Is this can be done using bindings or should I stop fighting the framework and and use a datasource? It can be done with bindings***. All you've done is clarified that totalPrice isn't a derived property after all. So, you make a regular property (with getter and setter), and initialize the instance variable that backs it to the default value (items * price). Or, you can initialize the instance variable to a not set value (like 0 or NSNotFound, or something), but then you won't be able to just @synthesize the property -- you'll have to write code to return either the default or the explicit value, depending on the contents of the instance variable. (Or, you can have a BOOL instance variable that says whether the default has been overridden, but in that case you'll have to add code to the setter instead.) And, incidentally, what you are trying to do is in no way fighting the framework. You're doing exactly what you're supposed to be doing. :) *** Again, focus your thinking on *properties*. Ask yourself what properties your data model needs to support the user interaction, and it should become immediately clear what to do. Bindings are a way of hooking up (in this case) your UI to your data model's properties. They don't replace the data model design part of the process. ___ 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
didReceivePTPEvent is not triggered with Canon T2i
I am trying to create an application that allows a user to take a picture from a camera device. I am usingImageCaptureCore.framework to do this by using the requestTakePicture method, and I've set a delegate to catch the didReceivePTPEvent message to tell me when the capture is complete. If I try with my Canon PowerShot A80, didReceivePTPEvent is triggered, but when I use a Canon EOS Rebel T2i or any other professional camera device, didReceivePTPEvent is not triggered. Does anyone know why didReceivePTPEvent is not triggered on some cameras? Thanks for your help.___ 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
MPMoviePlayerController Fast forward
I've implemented MPMoviePlayerController (iPhone/iPad) and I'm playing videos
without trouble but I'm not sure how to receive an event from the Fast forward
overlay button.
I've tried everything the documentation suggests about remote control but I'm
not sure that's the way.
I've tried the following code:
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)event {
if( event.type == UIEventTypeRemoteControl ) {
NSLog(@sub type: %d, event.subtype);
}
}
Not sure where to place this (and when I place it in the header I get
redefinition errors):
typedef enum {
// available in iPhone OS 3.0
UIEventSubtypeNone = 0,
// for UIEventTypeMotion, available in iPhone OS 3.0
UIEventSubtypeMotionShake = 1,
// for UIEventTypeRemoteControl, available in iPhone OS 4.0
UIEventSubtypeRemoteControlPlay = 100,
UIEventSubtypeRemoteControlPause= 101,
UIEventSubtypeRemoteControlStop = 102,
UIEventSubtypeRemoteControlTogglePlayPause = 103,
UIEventSubtypeRemoteControlNextTrack= 104,
UIEventSubtypeRemoteControlPreviousTrack= 105,
UIEventSubtypeRemoteControlBeginSeekingBackward = 106,
UIEventSubtypeRemoteControlEndSeekingBackward = 107,
UIEventSubtypeRemoteControlBeginSeekingForward = 108,
UIEventSubtypeRemoteControlEndSeekingForward= 109,
} UIEventSubtype;
Bottom line is I would love to receive the FF event. Has anyone successfully
done this?
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Re: drawRect not getting called problem solved
On Jul 28, 2011, at 6:31 PM, Tom Jeffries wrote: I appreciate all the comments on the problem I had with drawRect not getting called. I finally extracted the code that was not working and put it in a new program, and it worked perfectly. I'm still not sure whether there was a problem in my code or if I unearthed a problem in Cocoa, but I'm now adding the rest of the original program to the new program, and the graphics are working. I can't help but doubt it was a Cocoa bug. You admitted previously that you were new to OS X programming, and that is the most likely cause of the problem, I'm afraid. I understand that people who program in only one environment want to see code that matches the way they learned to program. That causes problems for those of us who work in multiple environments, some of which have a whole different set of rules. However, maybe it's a sign that software development is still at an early stage that some environments insist on Data and others insist on data. I do think it's important to keep in mind the difference between code and data, and some of the suggestions I got seemed to show some lack of clarity in that area. Confusing the two may work in certain specific environments, but it reflects a misunderstanding of the way computers actually work. I think it's important to have an awareness of the difference. Thanks again for your help. With all due respect, assuming that those expecting a convention for a given environment must only be proficient in that environment is presumptive and a little rude. Conventions convey information. As you witnessed, it was difficult for people to understand what precisely your code was doing because you were violating several conventions that convey to the reader events that are occurring, like whether or not you're calling a method of a class or an instance of a class. That was important important in attempting to diagnose your problem. Someone who works in multiple environments should be experienced enough to be more acutely aware of the usefulness of such conventions, especially when communicating with others. Attempting to shoehorn one's personal style across environments will only confuse those more experienced in each who are looking at your code. The conversation that your confusion comment is in response to actually illustrated some major confusions on your part about sending messages to object references (the C pointer myString that you didn't consider to be a variable), the difference between a C function and an Objective-C method, and other object-oriented concepts the language is based on that are, I think, unnecessarily frustrating you. Apple has an excellent Objective-C primer in their documentation: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ObjectiveC/Introduction/introObjectiveC.html Preston___ 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
UIImageView subclasses
Hi all! Here's what I've got: (Xcode 3.2.5 - iOS SDK 4) A view controller that dynamically creates UIImageView subclass instances as subviews in it's awakeFromNib According to the documentation, UIImageView subclasses do not enable user interaction by default, so ... // Create a UIImageView that'll animate Number1.png through Number8.png, and load Number.png as the // default (non-aminating) image MyImageView *iv = [[MyImageView alloc] initWithBaseName:@Number]; [iv setUserInteractionEnabled:YES]; // ... // Don't know what to do here! // ... [self.view addSubview:iv]; ... Okay, now what? How do I connect the Touch Up Inside of the UIImageView (subclass instance) to the -(IBAction)customButtonTouched:(id)sender; method of my view controller (the one that created the UIImageView subclass instances as subviews) 2nd question: how can I get first crack at the Touch Up Inside event (in the UIImageView subclass) before I pass it on to my view controller? ___ 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: UIImageView subclasses
On 29/07/2011, at 3:24 PM, William Squires wrote: Okay, now what? How do I connect the Touch Up Inside of the UIImageView (subclass instance) to the -(IBAction)customButtonTouched:(id)sender; method of my view controller (the one that created the UIImageView subclass instances as subviews) 2nd question: how can I get first crack at the Touch Up Inside event (in the UIImageView subclass) before I pass it on to my view controller? In both cases, override the method -touchesEnded:withEvent: and do what you want there. Alternatively, attach a UIGestureRecognizer and sets its delegate to the view - then that delegate method can do what it needs to do, including calling the controller to do its part. You might need to add an ivar (or property) for the controller if it's not next responder - I don't see that UIView has a reference automatically to its controller. --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/archive%40mail-archive.com This email sent to arch...@mail-archive.com
