How do I make one thread wait until another thread exits?
This seems a trivial question for a multi-threading app, but I haven't been successful in implementing this in Cocoa. I've got deadlocks and strange logs for seemingly no reason. Here's my problem: There is the main thread that starts a worker NSOperation to do some job (-[NSOperationQueue addOperation]). In case if the main thread is asked to start another NSOperation, it must cancel the current operation, *wait until it exits*, and start another one. What I have tried: the operation object creates and locks an NSLock object in its -init. When the main thread cancels the operation (-cancel), it does the following: // cancel [m_operation cancel]; // wait until operation exits [[m_operation isCompletedLock] lock]; // the operation object eventually checks the -isCancelled flag and then sends -unlock to the lock, and its thread exits. // unlock the lock [[m_operation isCompletedLock] unlock]; // release [m_operation release]; m_operation = nil; The effect is that sometimes it works but sometimes not, and I get logs in the console: *** -[NSLock lock]: deadlock (NSLock: 0x197a90 '(null)') *** -[NSLock unlock]: lock (NSLock: 0x197a90 '(null)') unlocked from thread which did not lock it *** Break on _NSLockError() to debug. Is this a valid way of implementing the subject? Am I using NSLock correctly for this purpose? Or if not, can someone please post the correct way of doing this? ___ 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
[iPhone] Abort/remove all running/pending animations
Hi, I'm resizing and moving the content of a UIScrollView in the - scrollViewDidEndZooming:withView:atScale: method including the removing/adding of views. This usually results in the content bouncing more or less uncontrollable. My question: Is it possible to remove/abort *all* (really all) pending/running animations (especially those in UIScrollView) to reorder all the views and start custom animations from there? Ruotger ___ 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
Garbage Collection and NSManagedObject
Hi guys
i have problem with the garbage collector. May App is a CoreData App
(not document based). If i try to change the database and load a new
one. The grabage collector collects the old NSMangedObjects from the
old store. But this happens in the gabage collector thread. The
mainThread is executing, too. So some of the managed objects will be
finalized after the deletion of the database. This results in an
exception like this:
GC: -finalize resulted in an exception (0x1477cd0) being thrown, break
on objc_exception_during_finalize_error to debug
The NSManagedObject with ID:XXX XXX has been invalidated.
The main problem is that such objects seems to get observer messages
and then they will hang up the app if they try to access there
parameters from the store.
One solution would be to perform the gabage collection in the main
thread. But I don't know how.
Another solution should be to wait for the gabage collector until it
is finished with somethig stupid like this:
while ([[NSGarbageCollector defaultCollector] isCollecting]) {
[NSThread sleepForTimeInterval:0.5];
}
But this hangs up the app, too. I don't know why!
So has somebody a solution or idea for this garbage collector problem?
Thanks Regrads
Samuel Strupp
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Saving IKImageBrowser Order and Content?
topic says it all. i have installed an IKImageBrowser which allows me to drop images and reorder them. it would be great to be able to automatically save the dropped images as well as their order so that the next time the app starts and the image browser loads up everything is still there. can someone please direct me to where i should be looking to accomplish this? any known tutorials maybe? thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Reading packets from an audio file
On Thu, Feb 12, 2009 at 6:17 AM, rethish reth...@newtok.com wrote: Hi all, I need to append an newly recorded audio file with the end of an existing file. I use the function , AudioFileOpenURL ( [snip] This is completely off-topic here. You'll probably get much better results on the coreaudio-api list. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How do I make one thread wait until another thread exits?
On Thu, Feb 12, 2009 at 4:25 AM, Oleg Krupnov oleg.krup...@gmail.com wrote: This seems a trivial question for a multi-threading app, but I haven't been successful in implementing this in Cocoa. I've got deadlocks and strange logs for seemingly no reason. Here's my problem: There is the main thread that starts a worker NSOperation to do some job (-[NSOperationQueue addOperation]). In case if the main thread is asked to start another NSOperation, it must cancel the current operation, *wait until it exits*, and start another one. What I have tried: the operation object creates and locks an NSLock object in its -init. When the main thread cancels the operation (-cancel), it does the following: // cancel [m_operation cancel]; // wait until operation exits [[m_operation isCompletedLock] lock]; // the operation object eventually checks the -isCancelled flag and then sends -unlock to the lock, and its thread exits. // unlock the lock [[m_operation isCompletedLock] unlock]; // release [m_operation release]; m_operation = nil; Yeah, don't do this. Locks are for mutual exclusion *only*. Use NSConditionLock, something like this: #define OPERATION_FINISHED 1 // operation exit [condLock lock]; [condLock unlockWithCondition:OPERATION_FINISHED]; // wait for exit [condLock lockWhenCondition:OPERATION_FINISHED]; [condLock unlock]; Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Garbage Collection and NSManagedObject
On Thu, Feb 12, 2009 at 9:52 AM, Samuel Strupp str...@synium.de wrote: i have problem with the garbage collector. May App is a CoreData App (not document based). If i try to change the database and load a new one. It's not clear what you mean here. Be *very* specific (and show code). -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
newbie question on creating .png files
Hi folks, I'm relatively new to Cocoa and need some direction on creating .png files. I need to create 365 png files (one for each day of the year) to be used as tags by other folks (eg JAN01.png JAN2.png...DEC31.png). I think I understand the draw/graphics concept, but I've been unable to get clear direction on how to transform(aka create) the picture to 48x48 .png files. I'm not looking for code (its welcome of course), but a direction on the 'bridge' between create/displaying an image and saving it to a file. Thanks in advance, Steven ___ 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: Saving IKImageBrowser Order and Content?
I will assume that you are using an array controller to handle the backing data for you IKImageBrowserView. If so, all you will need to do is archive the array controller's arrangedObjects (or content plus any filter predicate) and save it to a file - perhaps using NSArray's handy-dandy -writeToFile:atomically: method. if my assumption is wrong, then you'll need to provide details of what you are actually doing (for data-sourcing) and what you have tried before you asked your question. regards, douglas On Feb 12, 2009, at 10:01 AM, Chunk 1978 wrote: topic says it all. i have installed an IKImageBrowser which allows me to drop images and reorder them. it would be great to be able to automatically save the dropped images as well as their order so that the next time the app starts and the image browser loads up everything is still there. can someone please direct me to where i should be looking to accomplish this? any known tutorials maybe? thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Garbage Collection and NSManagedObject
Hi
I simply want to delete the actual database (SQL Database) and load a
new one.
First: all controllers which hold refs to NSManagedObjects will be
deleted.
Then the i call [[NSGarbageCollector defaultCollector]
collectExhaustively];
Then i disconnect from the database.
This is the code to disconnect from the databse:
-(BOOL) removeData {
NSError *error;
if (managedObjectContext != nil) {
if ([managedObjectContext commitEditing]) {
if ([managedObjectContext persistentStoreCoordinator]
[[[managedObjectContext persistentStoreCoordinator]
persistentStores] count] 0) {
if ([managedObjectContext hasChanges] ![managedObjectContext
save:error]) {
NSLog(@Save Error.);
}
}
}
}
managedObjectContext = nil;
persistentStoreCoordinator = nil;
managedObjectModel = nil;
return YES;
}
The problem is that the disconnect and the collection of garbage is
parallel. So the invalidate exception is thrown.
I have no problems with the disconnect from the old and the reconnect
to new databse. Thats working. Only the old NSManagedObjects seems to
be not deleted and create errors.
Am 12.02.2009 um 16:30 schrieb I. Savant:
On Thu, Feb 12, 2009 at 9:52 AM, Samuel Strupp str...@synium.de
wrote:
i have problem with the garbage collector. May App is a CoreData
App (not
document based). If i try to change the database and load a new one.
It's not clear what you mean here. Be *very* specific (and show
code).
--
I.S.
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Re: NSTextView and keyDown: in the responder chain
On Feb 11, 2009, at 10:21 PM, Tom wrote: However, I've found that when an NSTextView receives a keyDown event that doesn't handle, it doesn't bother to send the event down the responder chain and just calls NSBeep(). I expect that there isn't a keyDown event that NSTextView doesn't handle. It sends them all to -interpretKeyEvents. The events go through the system input manager and get back to the NSTextView in the form of -insertText: or -doCommandBySelector:. It is doCommandBySelector: that is firing the beep. You can set a breakpoint on NSBeep to see the call stack. Ross ___ 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 do I make one thread wait until another thread exits?
Thanks, Mike.
I assume that I need to also use
#define OPERATION_NOT_FINISHED 0
and
condLock = [[NSConditionLock alloc] initWithCondition: OPERATION_NOT_FINISHED];
Right?
I have a doubt here, however. What if the cancel message is sent even
before the worker thread had the possibility to start? In that case,
the NSOperation may remove itself from the queue and never start its
worker thread altogether. Than the main thread will deadlock because
the condition will never be OPERATION_FINISHED. How to fix this?
Yeah, don't do this. Locks are for mutual exclusion *only*.
Use NSConditionLock, something like this:
#define OPERATION_FINISHED 1
// operation exit
[condLock lock];
[condLock unlockWithCondition:OPERATION_FINISHED];
// wait for exit
[condLock lockWhenCondition:OPERATION_FINISHED];
[condLock unlock];
Mike
On Thu, Feb 12, 2009 at 3:09 PM, Oleg Krupnov oleg.krup...@gmail.com wrote:
Can someone please give me a sample of the valid way of using
NSCondition for this? I am still confused regarding how I can avoid
the subtle sync errors.
I've tried the following code
// main thread
// cancel operation
[m_operation cancel];
// wait until operation exits
[m_operationCompletionCondition lock];
[m_operationCompletionCondition wait];
[m_operationCompletionCondition unlock];
The operation object:
- (id) initWithCompletionCondition:(NSCondition*)completionCondition
{
...
m_completionCondition = [completionCondition retain];
// lock the condition while in the main thread
[m_completionCondition lock];
}
// Worker thread's main
- (void)main
{
...
// signal operation completed from the worker thread
[m_completionCondition signal];
[m_completionCondition unlock];
}
The problem is however that sometimes the worker thread exits in
between the -cancel message and before the -wait message. So there is
nothing to wait anymore and the program waits endlessly. I don't see
how to resolve this problem without going too sophisticated. I must be
doing something wrong, don't I?
On Thu, Feb 12, 2009 at 1:39 PM, Andrew Farmer andf...@gmail.com wrote:
On 12 Feb 09, at 01:25, Oleg Krupnov wrote:
This seems a trivial question for a multi-threading app, but I haven't
been successful in implementing this in Cocoa. I've got deadlocks and
strange logs for seemingly no reason.
snip
// the operation object eventually checks the -isCancelled flag and
then sends -unlock to the lock, and its thread exits.
This is not an appropriate use of locks, and the runtime error you're
getting (lock unlocked from thread which did not lock it) is a sign of
this misuse. Indeed, the design you've described actually contains a subtle
synchronization error that could cause deadlock if your code attempts to
cancel a thread before it has fully initialized.
As a general point, though, locks are designed for mutual exclusion on
shared resources, not inter-thread signalling. Use NSCondition for this sort
of communication; alternatively, you may want to investigate pthread_cancel
for a more specific solution.
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Re: newbie question on creating .png files
Le 12 févr. 09 à 16:31, Smith, Steven (MCP) a écrit : Hi folks, I'm relatively new to Cocoa and need some direction on creating .png files. I need to create 365 png files (one for each day of the year) to be used as tags by other folks (eg JAN01.png JAN2.png...DEC31.png). I think I understand the draw/graphics concept, but I've been unable to get clear direction on how to transform(aka create) the picture to 48x48 .png files. I'm not looking for code (its welcome of course), but a direction on the 'bridge' between create/displaying an image and saving it to a file. Thanks in advance, All drawing code require a valid graphic context. When you draw on screen (in an NSView for example), the framework setups a valid 'on screen' context before calling the drawRect: method. If you want to draw into an image, you just have to setup a graphic context on an image, and call your drawing code. A simple way to do this it to create an NSImage, and then using lockFocus, you can get a graphics context to draw in this image (just like you draw on screen). Conceptually: NSImage *img = [[NSImage alloc] initWithSize:48, 48]; [img lockFocus]; // you drawing code goes here [img unlockFocus] // Now, you can save your image using standard NSImage functions. Unfortunately, I don't think you can save an NSImage as a PNG (it only supports the TIFFRepresentation method). To have a greater control over the output format, you have to create a bitmap (NSBitmapImageRep) And so, you will have a chance to use the longuest Cocoa method name: - (id)initWithBitmapDataPlanes:(unsigned char **)planes pixelsWide: (NSInteger)width pixelsHigh:(NSInteger)height bitsPerSample: (NSInteger)bpssamplesPerPixel:(NSInteger)spp hasAlpha:(BOOL)alpha isPlanar:(BOOL)isPlanar colorSpaceName:(NSString *)colorSpaceName bitmapFormat:(NSBitmapFormat)bitmapFormatbytesPerRow: (NSInteger)rowBytes bitsPerPixel:(NSInteger)pixelBits Create your image rep using this method. create a graphics context using +[NSGraphicsContext graphicsContextWithBitmapImageRep:] Save the current graphic state +[NSGraphicsContext saveGraphicsState] Set your new context as the current context [NSGraphicsContext setCurrentContext:myContext]; Call your drawing function. restore the graphic state +[NSGraphicContext restoreGraphicsState]; And now, your bitmap image is ready to be saved (using representationUsingType:). ___ 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: Garbage Collection and NSManagedObject
On Thu, Feb 12, 2009 at 10:55 AM, Samuel Strupp str...@synium.de wrote:
I simply want to delete the actual database (SQL Database) and load a new
one.
Okay.
First: all controllers which hold refs to NSManagedObjects will be deleted.
What do you mean deleted? Do you just mean you're disconnecting
them from their managed object context?
Then the i call [[NSGarbageCollector defaultCollector] collectExhaustively];
Why? If you're going to do it at all, I'd imagine you'd do it after
the tear-down of *everything* related to your context and persistent
store.
Then i disconnect from the database.
Again, I'd do this *before* forcing collection.
This is the code to disconnect from the databse:
-(BOOL) removeData {
NSError *error;
if (managedObjectContext != nil) {
if ([managedObjectContext commitEditing]) {
if ([managedObjectContext persistentStoreCoordinator]
[[[managedObjectContext persistentStoreCoordinator] persistentStores] count]
0) {
if ([managedObjectContext hasChanges]
![managedObjectContext save:error]) {
NSLog(@Save Error.);
}
}
}
}
managedObjectContext = nil;
persistentStoreCoordinator = nil;
managedObjectModel = nil;
return YES;
}
I don't see any code related to removing the context and
disconnecting from the persistent store. Are you really pulling the
store's file (the sqlite database) out from underneath Core Data and
expecting it to work normally? I wouldn't.
The problem is that the disconnect and the collection of garbage is
parallel. So the invalidate exception is thrown.
Are you *sure* that's the problem? It may not be. My first suspect
is that I don't see anywhere that you're actually tearing down the
right parts of the Core Data stack (the context and the persistent
store).
I have no problems with the disconnect from the old and the reconnect to new
databse. Thats working. Only the old NSManagedObjects seems to be not
deleted and create errors.
Well, no, it's not really working, is it? The managed objects should
go away with your context. If they're sticking around and throwing
errors, that's your first clue that you're likely not handling the
Core Data stack properly during this disconnect process.
Core Data lets you create and remove as many contexts as you like to
a persistent store - this is one of the features that makes Core Data
shine (and even gives it the ability to handle multithreading with
grace). If you've got managed objects hanging around after you dispose
of a context, you're doing it wrong:
Core Data Programming Guide
http://developer.apple.com/DOCUMENTATION/Cocoa/Conceptual/CoreData/cdProgrammingGuide.html
Low Level Core Data Tutorial
http://developer.apple.com/DOCUMENTATION/Cocoa/Conceptual/CoreDataUtilityTutorial/Articles/chapter_1_section_1.html
--
I.S.
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Re: newbie question on creating .png files
On 12.02.2009, at 17:14, Jean-Daniel Dupas wrote: Unfortunately, I don't think you can save an NSImage as a PNG (it only supports the TIFFRepresentation method). You can create a new NSBitmapImageRep using the TIFFRepresentation and use representationUsingType:properties: to get the PNG-data: NSData* TIFFData = [img TIFFRepresentation]; NSBitmapImageRep* bitmapImageRep = [NSBitmapImageRep imageRepWithData:TIFFData]; NSData* PNGData = [bitmapImageRep representationUsingType:NSPNGFileType properties:nil]; [PNGData writeToFile: @JAN01.png atomically: YES]; HTH, felix ___ 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: Garbage Collection and NSManagedObject
On Thu, Feb 12, 2009 at 11:23 AM, I. Savant idiotsavant2...@gmail.com wrote: Are you *sure* that's the problem? It may not be. My first suspect is that I don't see anywhere that you're actually tearing down the right parts of the Core Data stack (the context and the persistent store). ... sorry, every where I spoke about the persistent store, I'm referring to manipulating the persistent store coordinator (NSPersistentStoreCoordinator). It also occurs to me that it'd probably be far easier to simply delete all managed objects in your context and save ... why replace the actual file? -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Saving IKImageBrowser Order and Content?
hi douglas, i am not using an array controller... my current method is copying images to the pasteboard (they are produced images from within the app) and writing them to a folder when they are dropped into the image browser. i'm assuming it shouldn't be too difficult to incorporate an array controller into what i have already to handle the arrangements of the images and hopefully have no problem trying to get the imagebrowser to read the array when it opens (it appears that the IKImageBrowser class isn't documented very strongly), but i've never used an array controller before. know of any tutorials off the top of your head? On Thu, Feb 12, 2009 at 10:52 AM, douglas welton douglas_wel...@earthlink.net wrote: I will assume that you are using an array controller to handle the backing data for you IKImageBrowserView. If so, all you will need to do is archive the array controller's arrangedObjects (or content plus any filter predicate) and save it to a file - perhaps using NSArray's handy-dandy -writeToFile:atomically: method. if my assumption is wrong, then you'll need to provide details of what you are actually doing (for data-sourcing) and what you have tried before you asked your question. regards, douglas On Feb 12, 2009, at 10:01 AM, Chunk 1978 wrote: topic says it all. i have installed an IKImageBrowser which allows me to drop images and reorder them. it would be great to be able to automatically save the dropped images as well as their order so that the next time the app starts and the image browser loads up everything is still there. can someone please direct me to where i should be looking to accomplish this? any known tutorials maybe? thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Design Question
On Feb 12, 2009, at 9:50 AM, David Blanton wrote: Do I understand correctly that if a layer with explicit animations is hidden the animation is still running? Yes, animations always run, regardless of the hidden state of a layer (hidden is just another render attribute). -- David Duncan Apple DTS Animation and Printing ___ 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: Design Question
So besides hiding a layer I should also removeAnimationForKey: Thanks! On Feb 12, 2009, at 11:16 AM, David Duncan wrote: On Feb 12, 2009, at 9:50 AM, David Blanton wrote: Do I understand correctly that if a layer with explicit animations is hidden the animation is still running? Yes, animations always run, regardless of the hidden state of a layer (hidden is just another render attribute). -- David Duncan Apple DTS Animation and Printing David Blanton ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Saving IKImageBrowser Order and Content?
Two things: 1) when I typed NSArrayController into the search field on the ADC site, I got 209 possible places where you could begin your search for info on how to use NSArrayController bindings with IKImageBrowserView. If none of these is sufficient or you are a novice to the binding concept, I suggest that you put Cocoa bindings into the ADC search field. This option netted me over 1060 places to begin my search for enlightenment. 2) if you are not using a bound array controller, then you must be using some sort of datasource object. The straightforward solution would seem to be simply saving the data that your datasource object is computing with when the application terminates and re-read said data when the application starts. Is that not an option? (for example, using the image-browser sample code from the ADC site, you might simply save the array of objects kept in the variable images) regards, douglas On Feb 12, 2009, at 12:53 PM, Chunk 1978 wrote: hi douglas, i am not using an array controller... my current method is copying images to the pasteboard (they are produced images from within the app) and writing them to a folder when they are dropped into the image browser. i'm assuming it shouldn't be too difficult to incorporate an array controller into what i have already to handle the arrangements of the images and hopefully have no problem trying to get the imagebrowser to read the array when it opens (it appears that the IKImageBrowser class isn't documented very strongly), but i've never used an array controller before. know of any tutorials off the top of your head? On Thu, Feb 12, 2009 at 10:52 AM, douglas welton douglas_wel...@earthlink.net wrote: I will assume that you are using an array controller to handle the backing data for you IKImageBrowserView. If so, all you will need to do is archive the array controller's arrangedObjects (or content plus any filter predicate) and save it to a file - perhaps using NSArray's handy- dandy -writeToFile:atomically: method. if my assumption is wrong, then you'll need to provide details of what you are actually doing (for data-sourcing) and what you have tried before you asked your question. regards, douglas On Feb 12, 2009, at 10:01 AM, Chunk 1978 wrote: topic says it all. i have installed an IKImageBrowser which allows me to drop images and reorder them. it would be great to be able to automatically save the dropped images as well as their order so that the next time the app starts and the image browser loads up everything is still there. can someone please direct me to where i should be looking to accomplish this? any known tutorials maybe? thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/douglas_welton%40earthlink.net This email sent to douglas_wel...@earthlink.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: newbie question on creating .png files
On Feb 12, 2009, at 8:28 AM, Felix Franz wrote: You can create a new NSBitmapImageRep using the TIFFRepresentation and use representationUsingType:properties: to get the PNG-data: NSData* TIFFData = [img TIFFRepresentation]; NSBitmapImageRep* bitmapImageRep = [NSBitmapImageRep imageRepWithData:TIFFData]; NSData* PNGData = [bitmapImageRep representationUsingType:NSPNGFileType properties:nil]; [PNGData writeToFile: @JAN01.png atomically: YES]; While this might be fine for a one-off application where performance and memory usage doesn't matter, this is really not the best way to convert an NSImage into a PNG. In fact, imageRepWithData: should work with any file type that is supported by ImageIO, which natively includes PNG, so you could pass in the original file data rather than going through NSImage. -- David Duncan Apple DTS Animation and Printing ___ 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
Proper NSOperation isCancelled handling
So I'm a bit confused about how my NSOperation subclass should
implement the cancel method. The documentation says that isCancelled
is a KVO-compliant property. So I figured that calling [super cancel]
ought to take care of that. But it doesn't. Doesn't appear to do
anything, actually, whether I call it or not [self isCancelled] still
returns the expected value in my -start method, but no apparent
isCancelled KVO notification is generated. So I decided to implement
my cancel method as
- (void)cancel
{
// if we have started the operation, cancel it
if (self.downloadConnection)
[self.downloadConnection cancel];
// this generates isExecuting and isFinished notifications as needed
[self sendKVONotifications:nil];
// ok ... what should we do about the isCancelled property?
[self willChangeValueForKey:@isCancelled];
[super cancel];
[self didChangeValueForKey:@isCancelled];
}
... which just doesn't seem quite right. What's the correct thing to do?
--
Alex Curylo -- a...@alexcurylo.com -- http://www.alexcurylo.com/
I just can't accept that 24 reserves, 3 hospitalizations and
one fatality are in any way acceptable for what should be the
premier event on the paragliding calendar. -- Mark Hayman
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Re: Transparent Image
On 12 Feb 2009, at 04:37:35, Michael Ash wrote: On Wed, Feb 11, 2009 at 3:41 PM, Christian Graus christian.gr...@gmail.com wrote: Please file a bug and request this functionality. OK - that would not have occurred to me at all. That works in the Mac world ? Awesome !! I've found plenty of Microsoft bugs, and I was even an MVP at the time, they always ignored me, or told me they were features ( and I found some MAJOR bugs in WPF ). I assume if I go to the Apple Dev Connection and log in, I'll be able to find a place to log bugs ? Hah, Apple do something about filed bugs, right. Looking at the list of bugs I've filed, the most common state is Open. The next most common state is Duplicate. And don't think that Duplicate means your bug gets merged into the original and now you get told about what's happening with the original bug. No, Duplicate is a black hole of information. Once your bug is marked Duplicate, you lose, game over, no more information will be arriving, ever. Filing bugs can be worthwhile. Perhaps 5% of the time it actually gets results. But be prepared for very little reward. Mike Apple have asked for more information on about half of my bugs, but most of them do remain unfixed. ___ 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: Binding to custom NSCell
24 hours later, still completely stumped on this one. The sticking
point seems to be that Apple's NSTextFieldCell is doing something that
is not clearly defined in the Key-Value Observing/Key-Value coding
documentation to allow the following to work
[column bind: @value toObject: arrayController withKeyPath:
@arrangedObjects.name options: nil];
I suspect that all I'm missing is some required accessor, but nowhere
in the documentation does Apple offer a step by step example on how to
write a bindable custom NSCell subclass. What methods are absolutely
required? What methods are optional?
Here's my custom cell code. Where am I going wrong?
Thanks for any help
@interface PMXDocumentCell : NSCell
{
NSButtonCell*addButton;
NSImage *backImage,
*backSelectedImage,
*addButtonImage,
*addButtonSelectedImage,
*currentBackImage;
NSString*documentName;
NSDictionary*textAttributes;
}
+ (id) documentCell;
- (void) initImages;
- (void) initSubCells;
- (NSString *) documentName;
- (void) setDocumentName:(NSString *) inName;
- (id) objectValue;
- (void) setObjectValue:(id) inObject;
@end
#define ADD_BUTTON_SIZE 17
@implementation PMXDocumentCell
+ (id) documentCell
{
return [[[PMXDocumentCell alloc]
init]
autorelease];
}
- (id) init
{
self = [super init];
if (self)
{
[self initImages];
[self initSubCells];
currentBackImage= backImage;
textAttributes = [[NSDictionary alloc]
initWithObjectsAndKeys:
[NSColor blackColor], NSForegroundColorAttributeName,
[NSFont
systemFontOfSize:13], NSFontAttributeName,
nil];
}
return self;
}
- (void) initImages
{
NSBundle*bundle = [NSBundle
bundleForClass: [self class]];
NSString*path;
path= [bundle pathForResource: @add_button
ofType: @png];
addButtonImage = [[NSImage alloc]
initWithContentsOfFile: path];
path = [bundle pathForResource: @add_button_white ofType:
@png];
addButtonSelectedImage = [[NSImage alloc] initWithContentsOfFile:
path];
path= [bundle pathForResource: @toolbar_25
ofType: @png];
backImage = [[NSImage alloc]
initWithContentsOfFile: path];
path = [bundle pathForResource: @toolbar_25_focus ofType:
@png];
backSelectedImage = [[NSImage alloc]
initWithContentsOfFile: path];
// set resizing
[addButtonImage setScalesWhenResized: YES];
[addButtonSelectedImage setScalesWhenResized: YES];
[backImage setScalesWhenResized: YES];
[backSelectedImage setScalesWhenResized: YES];
// size button images
[addButtonImage setSize: NSMakeSize(ADD_BUTTON_SIZE, ADD_BUTTON_SIZE)];
[addButtonSelectedImage setSize: NSMakeSize(ADD_BUTTON_SIZE,
ADD_BUTTON_SIZE)];
}
- (void) initSubCells
{
addButton = [[NSButtonCell alloc] init];
[addButton setBordered: NO];
[addButton setButtonType: NSMomentaryChangeButton];
[addButton setImage: addButtonImage];
[addButton setAlternateImage: addButtonSelectedImage];
}
- (void) drawWithFrame:(NSRect) inCellFrame
inView:(NSView *) inControlView
{
NSRect buttonFrame = NSMakeRect(inCellFrame.size.width -
ADD_BUTTON_SIZE - 6, inCellFrame.origin.y, ADD_BUTTON_SIZE,
ADD_BUTTON_SIZE),
nameFrame = NSMakeRect(6, inCellFrame.origin.y,
inCellFrame.size.width - ADD_BUTTON_SIZE - 12 , ADD_BUTTON_SIZE);
NSPoint textPoint = NSMakePoint(inCellFrame.origin.x + 1,
inCellFrame.origin.y);
currentBackImage = [self isHighlighted] ? backSelectedImage :
backImage ;
[currentBackImage drawAtPoint: inCellFrame.origin
fromRect: NSZeroRect
operation: NSCompositeSourceOver
fraction: 1.0];
[addButton drawWithFrame: buttonFrame
inView: inControlView];
[documentName drawInRect: nameFrame
Re: Transparent Image
On Feb 11, 2009, at 8:37 PM, Michael Ash wrote: On Wed, Feb 11, 2009 at 3:41 PM, Christian Graus christian.gr...@gmail.com wrote: Please file a bug and request this functionality. OK - that would not have occurred to me at all. That works in the Mac world ? Awesome !! I've found plenty of Microsoft bugs, and I was even an MVP at the time, they always ignored me, or told me they were features ( and I found some MAJOR bugs in WPF ). I assume if I go to the Apple Dev Connection and log in, I'll be able to find a place to log bugs ? http://bugreporter.apple.com Hah, Apple do something about filed bugs, right. Looking at the list of bugs I've filed, the most common state is Open. The next most common state is Duplicate. And don't think that Duplicate means your bug gets merged into the original and now you get told about what's happening with the original bug. No, Duplicate is a black hole of information. Once your bug is marked Duplicate, you lose, game over, no more information will be arriving, ever. Filing bugs can be worthwhile. Perhaps 5% of the time it actually gets results. But be prepared for very little reward. For what it's worth, filing bugs is *very* worthwhile. It lets Apple know what issues are important to developers and what problems they are encountering. Logging duplicates is also fine, as it gives us an idea of what problems are constantly being reported. The 'original' bug has references to the other bugs, and we use that when diagnosing the problem; it helps us *greatly* to have that information. Please do not disregard it as a fruitless effort. If you encounter a problem that you think is a bug, please go ahead and log a bug, and include the radar number when you post to this list. People who have radar access may want to take a look at the issue you are talking about in your post. thanks, corbin ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Binding to custom NSCell
On Feb 12, 2009, at 1:18 PM, Ken Tozier wrote:
24 hours later, still completely stumped on this one. The sticking
point seems to be that Apple's NSTextFieldCell is doing something
that is not clearly defined in the Key-Value Observing/Key-Value
coding documentation to allow the following to work
Your best bet is to probably just subclass NSTextFieldCell -- which is
probably correct for your cell, since you want to draw some text and
other sub cells. Modify the rect that you want the text to draw in,
and just call [super] to do the real drawing work.
[column bind: @value toObject: arrayController withKeyPath: @arrangedObjects.name
options: nil];
I suspect that all I'm missing is some required accessor, but
nowhere in the documentation does Apple offer a step by step example
on how to write a bindable custom NSCell subclass. What methods are
absolutely required? What methods are optional?
Please do log a bug requesting our documentation be clarified for how
to do this, and also log a bug saying that you can't bind the value
parameter of a plain NSCell. If you can, also enclose your test
project/code.
thank you!
corbin
Here's my custom cell code. Where am I going wrong?
Thanks for any help
@interface PMXDocumentCell : NSCell
{
NSButtonCell*addButton;
NSImage *backImage,
*backSelectedImage,
*addButtonImage,
*addButtonSelectedImage,
*currentBackImage;
NSString*documentName;
NSDictionary*textAttributes;
}
+ (id) documentCell;
- (void) initImages;
- (void) initSubCells;
- (NSString *) documentName;
- (void) setDocumentName:(NSString *) inName;
- (id) objectValue;
- (void) setObjectValue:(id) inObject;
@end
#define ADD_BUTTON_SIZE 17
@implementation PMXDocumentCell
+ (id) documentCell
{
return [[[PMXDocumentCell alloc]
init]
autorelease];
}
- (id) init
{
self = [super init];
if (self)
{
[self initImages];
[self initSubCells];
currentBackImage= backImage;
textAttributes = [[NSDictionary alloc]
initWithObjectsAndKeys:
[NSColor blackColor], NSForegroundColorAttributeName,
[NSFont
systemFontOfSize:13], NSFontAttributeName,
nil];
}
return self;
}
- (void) initImages
{
NSBundle*bundle = [NSBundle
bundleForClass: [self class]];
NSString*path;
path= [bundle pathForResource: @add_button
ofType: @png];
addButtonImage = [[NSImage alloc]
initWithContentsOfFile: path];
path = [bundle pathForResource: @add_button_white ofType:
@png];
addButtonSelectedImage = [[NSImage alloc] initWithContentsOfFile:
path];
path= [bundle pathForResource: @toolbar_25
ofType: @png];
backImage = [[NSImage alloc]
initWithContentsOfFile: path];
path = [bundle pathForResource: @toolbar_25_focus ofType:
@png];
backSelectedImage = [[NSImage alloc]
initWithContentsOfFile: path];
// set resizing
[addButtonImage setScalesWhenResized: YES];
[addButtonSelectedImage setScalesWhenResized: YES];
[backImage setScalesWhenResized: YES];
[backSelectedImage setScalesWhenResized: YES];
// size button images
[addButtonImage setSize: NSMakeSize(ADD_BUTTON_SIZE,
ADD_BUTTON_SIZE)];
[addButtonSelectedImage setSize: NSMakeSize(ADD_BUTTON_SIZE,
ADD_BUTTON_SIZE)];
}
- (void) initSubCells
{
addButton = [[NSButtonCell alloc] init];
[addButton setBordered: NO];
[addButton setButtonType: NSMomentaryChangeButton];
[addButton setImage: addButtonImage];
[addButton setAlternateImage: addButtonSelectedImage];
}
- (void) drawWithFrame:(NSRect) inCellFrame
inView:(NSView *) inControlView
{
NSRect buttonFrame = NSMakeRect(inCellFrame.size.width -
ADD_BUTTON_SIZE - 6, inCellFrame.origin.y, ADD_BUTTON_SIZE,
ADD_BUTTON_SIZE),
nameFrame = NSMakeRect(6, inCellFrame.origin.y,
inCellFrame.size.width - ADD_BUTTON_SIZE - 12 , ADD_BUTTON_SIZE);
Re: Communication between objects
Thanks all to who replied for taking the time to sort me out. Your replies have and will be helpful to my understanding of what goes on. I'll let it sink into my head a bit more in the morning (It's 3:16am here in Sydney). Kind regards to all, Jason ___ 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
Converting a CMYK NSImage to RGB
Folks,
I'm having an issue where CMYK images aren't being recognized by my
quartz compositions, so I need to convert them to RGB for display.
I've written a routine to do it, but its causing problems.
NSImageRep* theImageRep = [inputImage bestRepresentationForDevice:
[NSDictionary dictionaryWithObject: NSDeviceRGBColorSpace
forKey
: NSDeviceColorSpaceName]];
NSString* theColorSpace = [theImageRep colorSpaceName];
if ([theColorSpace isEqualToString: NSDeviceCMYKColorSpace])
{
NSBitmapImageRep* theRGBImageRep = [[[NSBitmapImageRep alloc]
initWithBitmapDataPlanes: NULL
pixelsWide
: [theImageRep pixelsWide]
pixelsHigh
: [theImageRep pixelsHigh]
bitsPerSample
: 8
samplesPerPixel
: 4
hasAlpha
: YES
isPlanar
: NO
colorSpaceName
: NSDeviceRGBColorSpace
bytesPerRow
: 0
bitsPerPixel
: 0] autorelease];
[inputImage lockFocus];
NSGraphicsContext* theContext = [NSGraphicsContext
graphicsContextWithBitmapImageRep: theRGBImageRep];
[NSGraphicsContext saveGraphicsState];
[NSGraphicsContext setCurrentContext: theContext];
NSRect theBoundsRect = NSMakeRect(0.0, 0.0, [theRGBImageRep
pixelsWide], [theRGBImageRep pixelsHigh]);
[[NSColor clearColor] set];
NSRectFill(theBoundsRect);
[theImageRep drawInRect: theBoundsRect];
[NSGraphicsContext restoreGraphicsState];
[inputImage unlockFocus];
ASSIGNOBJECT(rgbImage, [[[NSImage alloc] initWithSize:
[theImageRep size]] autorelease]);
[rgbImage addRepresentation: theRGBImageRep];
}
else
{
ASSIGNOBJECT(rgbImage, inputImage);
}
The resulting image is correct, but somewhere along the line, my
original image (inputImage) is being modified - the CMYK
representation is being removed, and replaced with a downsampled RGB
representation. The goal here was to leave inputImage unmodified, so
that when it is finally sent to the printer, the CMYK representation
would be used.
inputImage before creating the RGB version.
NSImage 0x12313dd0 Size={340.08, 340.08} Reps=(
NSBitmapImageRep 0xd8201c0 Size={340.08, 340.08}
ColorSpace=NSDeviceCMYKColorSpace BPS=8 BPP=32 Pixels=1417x1417
Alpha=NO Planar=NO Format=0
)
inputImage after creating the RGB version.
NSImage 0x12313dd0 Size={340.08, 340.08} Reps=(
NSCachedImageRep 0xd824530 Size={340, 340}
ColorSpace=NSCalibratedRGBColorSpace BPS=8 Pixels=340x340 Alpha=NO
)
Clearly, I'm doing something wrong. I added calls to [inputImage
lockFocus] and [inputImage unlockFocus] in order to resolve a multi-
thread problem, but that seems to have caused this problem.
So, what's the best way for me to convert an NSImage of unknown
pedigree to a simple RGB representation?
Thanks,
Ron Aldrich
Software Architects, Inc.
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CALayer wierdness
I set up a CALayer is shows in the iPhone Simulator does not show in the iPhone How can that be? ___ 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: CALayer wierdness
On Feb 12, 2009, at 21:23, David Blanton wrote: I set up a CALayer is shows in the iPhone Simulator does not show in the iPhone How can that be? I doubt anyone can answer your question without seeing relevant code snippets. /brian ___ 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: Binding to custom NSCell
Hmmm. Making my cell a subclass of NSTextFieldCell solved the problem.
I would dearly love to get a look at the the source for
NSTextFieldCell to see what it's doing, behind-the-scenes, that makes
this binding work. In general, it would be a boon to developers if
Apple would open up the source for these types of core AppKit classes.
It's not like NSTextFieldCell is some cutting edge class and would be
a great way for developers to see how to create subclasses the right
way.
Anyway, thanks for the tip, it works perfectly now. Just wish I knew
why...
-Ken
On Feb 12, 2009, at 6:18 PM, Corbin Dunn wrote:
On Feb 12, 2009, at 1:18 PM, Ken Tozier wrote:
24 hours later, still completely stumped on this one. The sticking
point seems to be that Apple's NSTextFieldCell is doing something
that is not clearly defined in the Key-Value Observing/Key-Value
coding documentation to allow the following to work
Your best bet is to probably just subclass NSTextFieldCell -- which
is probably correct for your cell, since you want to draw some text
and other sub cells. Modify the rect that you want the text to draw
in, and just call [super] to do the real drawing work.
[column bind: @value toObject: arrayController withKeyPath:
@arrangedObjects.name options: nil];
I suspect that all I'm missing is some required accessor, but
nowhere in the documentation does Apple offer a step by step
example on how to write a bindable custom NSCell subclass. What
methods are absolutely required? What methods are optional?
Please do log a bug requesting our documentation be clarified for
how to do this, and also log a bug saying that you can't bind the
value parameter of a plain NSCell. If you can, also enclose your
test project/code.
thank you!
corbin
Here's my custom cell code. Where am I going wrong?
Thanks for any help
@interface PMXDocumentCell : NSCell
{
NSButtonCell*addButton;
NSImage *backImage,
*backSelectedImage,
*addButtonImage,
*addButtonSelectedImage,
*currentBackImage;
NSString*documentName;
NSDictionary*textAttributes;
}
+ (id) documentCell;
- (void) initImages;
- (void) initSubCells;
- (NSString *) documentName;
- (void) setDocumentName:(NSString *) inName;
- (id) objectValue;
- (void) setObjectValue:(id) inObject;
@end
#define ADD_BUTTON_SIZE 17
@implementation PMXDocumentCell
+ (id) documentCell
{
return [[[PMXDocumentCell alloc]
init]
autorelease];
}
- (id) init
{
self = [super init];
if (self)
{
[self initImages];
[self initSubCells];
currentBackImage= backImage;
textAttributes = [[NSDictionary alloc]
initWithObjectsAndKeys:
[NSColor blackColor], NSForegroundColorAttributeName,
[NSFont
systemFontOfSize:13], NSFontAttributeName,
nil];
}
return self;
}
- (void) initImages
{
NSBundle*bundle = [NSBundle
bundleForClass: [self class]];
NSString*path;
path= [bundle pathForResource: @add_button
ofType: @png];
addButtonImage = [[NSImage alloc]
initWithContentsOfFile: path];
path = [bundle pathForResource: @add_button_white ofType:
@png];
addButtonSelectedImage = [[NSImage alloc] initWithContentsOfFile:
path];
path= [bundle pathForResource: @toolbar_25
ofType: @png];
backImage = [[NSImage alloc]
initWithContentsOfFile: path];
path = [bundle pathForResource: @toolbar_25_focus ofType:
@png];
backSelectedImage = [[NSImage alloc]
initWithContentsOfFile: path];
// set resizing
[addButtonImage setScalesWhenResized: YES];
[addButtonSelectedImage setScalesWhenResized: YES];
[backImage setScalesWhenResized: YES];
[backSelectedImage setScalesWhenResized: YES];
// size button images
[addButtonImage setSize: NSMakeSize(ADD_BUTTON_SIZE,
ADD_BUTTON_SIZE)];
[addButtonSelectedImage setSize: NSMakeSize(ADD_BUTTON_SIZE,
ADD_BUTTON_SIZE)];
}
- (void) initSubCells
{
Re: Binding to custom NSCell
Just for kicks, I tried stepping back a level and making my cell a
subclass of NSActionCell and that works too. So it seems that whatever
magic Apple is performing happens inside NSActionCell.
On Feb 12, 2009, at 11:09 PM, Ken Tozier wrote:
Hmmm. Making my cell a subclass of NSTextFieldCell solved the problem.
I would dearly love to get a look at the the source for
NSTextFieldCell to see what it's doing, behind-the-scenes, that
makes this binding work. In general, it would be a boon to
developers if Apple would open up the source for these types of core
AppKit classes. It's not like NSTextFieldCell is some cutting edge
class and would be a great way for developers to see how to create
subclasses the right way.
Anyway, thanks for the tip, it works perfectly now. Just wish I knew
why...
-Ken
On Feb 12, 2009, at 6:18 PM, Corbin Dunn wrote:
On Feb 12, 2009, at 1:18 PM, Ken Tozier wrote:
24 hours later, still completely stumped on this one. The sticking
point seems to be that Apple's NSTextFieldCell is doing something
that is not clearly defined in the Key-Value Observing/Key-Value
coding documentation to allow the following to work
Your best bet is to probably just subclass NSTextFieldCell -- which
is probably correct for your cell, since you want to draw some text
and other sub cells. Modify the rect that you want the text to draw
in, and just call [super] to do the real drawing work.
[column bind: @value toObject: arrayController withKeyPath:
@arrangedObjects.name options: nil];
I suspect that all I'm missing is some required accessor, but
nowhere in the documentation does Apple offer a step by step
example on how to write a bindable custom NSCell subclass. What
methods are absolutely required? What methods are optional?
Please do log a bug requesting our documentation be clarified for
how to do this, and also log a bug saying that you can't bind the
value parameter of a plain NSCell. If you can, also enclose your
test project/code.
thank you!
corbin
Here's my custom cell code. Where am I going wrong?
Thanks for any help
@interface PMXDocumentCell : NSCell
{
NSButtonCell*addButton;
NSImage *backImage,
*backSelectedImage,
*addButtonImage,
*addButtonSelectedImage,
*currentBackImage;
NSString*documentName;
NSDictionary*textAttributes;
}
+ (id) documentCell;
- (void) initImages;
- (void) initSubCells;
- (NSString *) documentName;
- (void) setDocumentName:(NSString *) inName;
- (id) objectValue;
- (void) setObjectValue:(id) inObject;
@end
#define ADD_BUTTON_SIZE 17
@implementation PMXDocumentCell
+ (id) documentCell
{
return [[[PMXDocumentCell alloc]
init]
autorelease];
}
- (id) init
{
self = [super init];
if (self)
{
[self initImages];
[self initSubCells];
currentBackImage= backImage;
textAttributes = [[NSDictionary alloc]
initWithObjectsAndKeys:
[NSColor blackColor], NSForegroundColorAttributeName,
[NSFont
systemFontOfSize:13], NSFontAttributeName,
nil];
}
return self;
}
- (void) initImages
{
NSBundle*bundle = [NSBundle
bundleForClass: [self class]];
NSString*path;
path= [bundle pathForResource: @add_button
ofType: @png];
addButtonImage = [[NSImage alloc]
initWithContentsOfFile: path];
path = [bundle pathForResource: @add_button_white ofType:
@png];
addButtonSelectedImage = [[NSImage alloc] initWithContentsOfFile:
path];
path= [bundle pathForResource: @toolbar_25
ofType: @png];
backImage = [[NSImage alloc]
initWithContentsOfFile: path];
path = [bundle pathForResource: @toolbar_25_focus ofType:
@png];
backSelectedImage = [[NSImage alloc] initWithContentsOfFile:
path];
// set resizing
[addButtonImage setScalesWhenResized: YES];
[addButtonSelectedImage setScalesWhenResized: YES];
[backImage setScalesWhenResized: YES];
[backSelectedImage setScalesWhenResized: YES];
Re: Window Max Zoom Size
On Feb 12, 2009, at 9:42 AM, Anthony Smith wrote: What is the best way to set the max zoom size for NSWindow? I was able to implement a solution by overriding zoom but that feels rather invasive so I'm assuming there's probably a better way. Check the docs for -windowWillResize:toSize:. -jcr ___ 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: memory leak analyzer tools
On Feb 10, 2009, at 11:32 PM, Valentin Dan wrote: Hi, What tools are there to analyze memory leaks in programs ? Is there something that would tell the exact location of the leak (the object that's not being released) ? Try /Developer/Applications/Instruments. It has a template specifically for finding leaks. -jcr The problem with trying to child-proof the world, is that it makes people neglect the far more important task of world-proofing the child. -- Hugh 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: Transparent Image
On Thu, Feb 12, 2009 at 5:48 PM, Corbin Dunn corb...@apple.com wrote: For what it's worth, filing bugs is *very* worthwhile. It lets Apple know what issues are important to developers and what problems they are encountering. Logging duplicates is also fine, as it gives us an idea of what problems are constantly being reported. The 'original' bug has references to the other bugs, and we use that when diagnosing the problem; it helps us *greatly* to have that information. Please do not disregard it as a fruitless effort. Right, it's useful (or so we are told by people who would know, like yourself), it just doesn't generate directly visible results in the bug reporter most of the time. So the instant gratification aspect of the whole endeavor is unfortunately missing, but it's still a worthwhile activity. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Binding to custom NSCell [Solved]
After looking at NSActionCell, I noticed the setControlView method
and this seems to be the missing link. NSActionCell sets it's control
view while NSCell does not. When I manually set the control view for
my custom cell to the table that contains it, viola! It works.
So, for any other NSCell subclassers out there, the progression of
steps is
MyCell *cell = [[[MYCell alloc] init] autorelease];
NSTableColumn *column = [[[NSTableColumn alloc] init] autorelease];
NSTableView *table = [[NSTableView alloc] initWithFrame: aFrame];
[cell setControlView: table];
[column setDataCell: cell];
[table addTableColumn: column];
[column bind: @value toObject: arrayController withKeyPath:
@arrangedObjects.key options: nil];
Hope this saves someone else a lost couple of days figuring this out...
On Feb 12, 2009, at 11:32 PM, Ken Tozier wrote:
Just for kicks, I tried stepping back a level and making my cell a
subclass of NSActionCell and that works too. So it seems that
whatever magic Apple is performing happens inside NSActionCell.
On Feb 12, 2009, at 11:09 PM, Ken Tozier wrote:
Hmmm. Making my cell a subclass of NSTextFieldCell solved the
problem.
I would dearly love to get a look at the the source for
NSTextFieldCell to see what it's doing, behind-the-scenes, that
makes this binding work. In general, it would be a boon to
developers if Apple would open up the source for these types of
core AppKit classes. It's not like NSTextFieldCell is some cutting
edge class and would be a great way for developers to see how to
create subclasses the right way.
Anyway, thanks for the tip, it works perfectly now. Just wish I
knew why...
-Ken
On Feb 12, 2009, at 6:18 PM, Corbin Dunn wrote:
On Feb 12, 2009, at 1:18 PM, Ken Tozier wrote:
24 hours later, still completely stumped on this one. The
sticking point seems to be that Apple's NSTextFieldCell is doing
something that is not clearly defined in the Key-Value Observing/
Key-Value coding documentation to allow the following to work
Your best bet is to probably just subclass NSTextFieldCell --
which is probably correct for your cell, since you want to draw
some text and other sub cells. Modify the rect that you want the
text to draw in, and just call [super] to do the real drawing work.
[column bind: @value toObject: arrayController withKeyPath:
@arrangedObjects.name options: nil];
I suspect that all I'm missing is some required accessor, but
nowhere in the documentation does Apple offer a step by step
example on how to write a bindable custom NSCell subclass. What
methods are absolutely required? What methods are optional?
Please do log a bug requesting our documentation be clarified for
how to do this, and also log a bug saying that you can't bind the
value parameter of a plain NSCell. If you can, also enclose your
test project/code.
thank you!
corbin
Here's my custom cell code. Where am I going wrong?
Thanks for any help
@interface PMXDocumentCell : NSCell
{
NSButtonCell*addButton;
NSImage *backImage,
*backSelectedImage,
*addButtonImage,
*addButtonSelectedImage,
*currentBackImage;
NSString*documentName;
NSDictionary*textAttributes;
}
+ (id) documentCell;
- (void) initImages;
- (void) initSubCells;
- (NSString *) documentName;
- (void) setDocumentName:(NSString *) inName;
- (id) objectValue;
- (void) setObjectValue:(id) inObject;
@end
#define ADD_BUTTON_SIZE 17
@implementation PMXDocumentCell
+ (id) documentCell
{
return [[[PMXDocumentCell alloc]
init]
autorelease];
}
- (id) init
{
self = [super init];
if (self)
{
[self initImages];
[self initSubCells];
currentBackImage= backImage;
textAttributes = [[NSDictionary alloc]
initWithObjectsAndKeys:
[NSColor blackColor], NSForegroundColorAttributeName,
[NSFont
systemFontOfSize:13], NSFontAttributeName,
nil];
}
return self;
}
- (void) initImages
{
NSBundle*bundle = [NSBundle
bundleForClass: [self class]];
NSString*path;
path= [bundle
Chnaging icon of running app
Is it possible to change the icon of a running app after it has already been started? My app has no .icns file not will it - but I want to set it to some other bundle's icon after my app has already launched. I've seen discussions in the archives about how to change the Dock icon, but not the one of the running app (I am thinking for Command-Tab). Thanks, Erg ___ 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: Chnaging icon of running app
Adium has a great example of what you're looking to do Sent from my iPhone On Feb 12, 2009, at 10:57 PM, Erg Consultant erg_consult...@yahoo.com wrote: Is it possible to change the icon of a running app after it has already been started? My app has no .icns file not will it - but I want to set it to some other bundle's icon after my app has already launched. I've seen discussions in the archives about how to change the Dock icon, but not the one of the running app (I am thinking for Command-Tab). Thanks, Erg ___ 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/ricklangschultz%40me.com This email sent to ricklangschu...@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/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: memory leak analyzer tools
CLANG worked quite well for us. On Feb 12, 2009, at 10:45 PM, John C. Randolph wrote: On Feb 10, 2009, at 11:32 PM, Valentin Dan wrote: Hi, What tools are there to analyze memory leaks in programs ? Is there something that would tell the exact location of the leak (the object that's not being released) ? Try /Developer/Applications/Instruments. It has a template specifically for finding leaks. -jcr The problem with trying to child-proof the world, is that it makes people neglect the far more important task of world-proofing the child. -- Hugh 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/alex%40webis.net This email sent to a...@webis.net Alex Kac - President and Founder Web Information Solutions, Inc. In the Country of the Blind, the one-eyed man is king. --Desiderius Erasmus ___ 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: CALayer wierdness
The Simulator is not case sensitive when it comes to file names. The file name in the project is Level 1 top.png Capital L This code yields a nil provider in the iPhone, ergo no layer contents imageFileName = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@level 1 top.png]; lower case l provider = CGDataProviderCreateWithFilename([imageFileName UTF8String]); _topLayer.contents = (id)CGImageCreateWithPNGDataProvider(provider, NULL, true, kCGRenderingIntentDefault); Whereas in the iPhone Simulator provider is not nil; On Feb 12, 2009, at 8:42 PM, Brian Christensen wrote: On Feb 12, 2009, at 21:23, David Blanton wrote: I set up a CALayer is shows in the iPhone Simulator does not show in the iPhone How can that be? I doubt anyone can answer your question without seeing relevant code snippets. /brian ___ 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
[SOLVED] Re: NSTextView and keyDown: in the responder chain
On 13/02/2009, at 1:58 AM, Ross Carter wrote:
On Feb 11, 2009, at 10:21 PM, Tom wrote:
However, I've found that when an NSTextView receives a keyDown
event that doesn't handle, it doesn't bother to send the event down
the responder chain and just calls NSBeep().
I expect that there isn't a keyDown event that NSTextView doesn't
handle. It sends them all to -interpretKeyEvents. The events go
through the system input manager and get back to the NSTextView in
the form of -insertText: or -doCommandBySelector:. It is
doCommandBySelector: that is firing the beep. You can set a
breakpoint on NSBeep to see the call stack.
Ross
You were spot on, Ross. Thanks for the help. Instead of keyDown: being
passed down the responder chain it is doCommandBySelector:.
The solution I've used is to override doCommandBySelector: and convert
it back into a keyDown: call in the last responder in the chain.
Here's the code:
- (void)doCommandBySelector:(SEL)aSelector
{
NSEvent* e = [NSApp currentEvent];
if([e type] == NSKeyDown){
[self keyDown:e];
} else {
[super doCommandBySelector:aSelector];
}
}
Kind regards,
Tom
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Matching String With ObjectForKey?
how can i equate an NSString to an ObjectForKey (which is also an
NSString)? kinda driving me crazy.
-=-=-=-
NSString *desktopPlist =
[@~/Library/Preferences/com.apple.desktop.plist
stringByExpandingTildeInPath];
NSString *originalDesktopBackgroundImage = NSDictionary
dictionaryWithContentsOfFile: desktopPlist]
objectForKey:@Background] objectForKey:@default]
objectForKey:@ImageFilePath];
NSLog(originalDesktopBackgroundImage);
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:originalDesktopBackgroundImage
forKey:@OriginalBackground];
NSString *pathy = @/Library/Desktop Pictures/Nature/Aurora.jpg;
if ([defaults objectForKey:@OriginalBackground] == pathy)
{
NSLog(@Same);
}
else
{
NSLog(@Not Same);
}
-=-=-=-
so i'm getting the path of the current desktop background and setting
it to the defaults. the current desktop image in the Aurora image.
my IF statement isn't working as i am expecting. the output reads:
-=-=-=-
2009-02-13 01:44:51.911 Test[33576:10b] /Library/Desktop
Pictures/Nature/Aurora.jpg
2009-02-13 01:44:51.913 Test[33576:10b] Not Same
-=-=-=-
but they are the same! aren't they?!
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Re: Matching String With ObjectForKey?
Hi, you compare objects with == but what you really want is isEqualToString: since you want to compare the string contents. Cheers, Volker ___ 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: Matching String With ObjectForKey?
On Feb 12, 2009, at 10:45 PM, Chunk 1978 wrote: if ([defaults objectForKey:@OriginalBackground] == pathy) .. but they are the same! aren't they?! Nope. You're comparing two addresses, not the contents of the objects at those addresses. Try: if ([[defaults objectForKey:@OriginalBackground] isEqualToString: pathy]) -jcr ___ 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: Matching String With ObjectForKey?
ahh... that old trap again ;)... thanks guys On Fri, Feb 13, 2009 at 1:56 AM, John C. Randolph j...@mac.com wrote: On Feb 12, 2009, at 10:45 PM, Chunk 1978 wrote: if ([defaults objectForKey:@OriginalBackground] == pathy) .. but they are the same! aren't they?! Nope. You're comparing two addresses, not the contents of the objects at those addresses. Try: if ([[defaults objectForKey:@OriginalBackground] isEqualToString: pathy]) -jcr ___ 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
