date:20090925

You haven't declared ownership of the pasteboard, so I imagine the  
system is somewhat confused. Fairly sure you need to do:


[pboard declareTypes:[NSArray arrayWithObject:NSStringPboardType]  
owner:self];

[pboard setString:str forType:NSStringPboardType];

On 25 Sep 2009, at 02:58, Todd Heberlein wrote:

I have an NSTableView and I have Drag  Drop working between table  
views for my application where I encode the object to an NSData and  
write it to the NSPasteboard. But now I want to create a string  
representation of the object, add it to the pasteboard as well, and  
then when the object is dragged to something like an email, the  
string representation of the object is written in. The content does  
seem to be written to the pasteboard, but the drop doesn't seem to  
happen in an appropriate target (email message, editor, etc.)


The same basic code works in -copy: but it doesn't seem to work in - 
tableView:writeRowsWithIndexes:toPasteboard:


The line of code is:

[pboard setString:str forType:NSStringPboardType];

Is there something different with the NSPasteboard passed into - 
tableView:writeRowsWithIndexes:toPasteboard: versus the pasteboard  
you get from [NSPasteboard generalPasteboard]? Any suggestions on  
what I am doing wrong?


Thanks,

Todd

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Re: Correct way to tell if a path is to a .bundle?

I would read up on UTIs. Get the type of each file and see if it  
conforms to what you require.


I have what I hope is a reasonably informative post here:
http://www.mikeabdullah.net/utis_diagram/

Note how there is a com.apple.plugin type. If you're using a custom  
format for your plug-ins (and you should), make your app declare a  
com.foo.app.plugin type for them, which conforms to com.apple.plugin.


On 25 Sep 2009, at 02:41, Rick Mann wrote:

I'm scanning a directory for plugins for my app. Given a path,  
what's the right way to tell if it's a path to a bundle?


TIA
--
Rick

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Re: Subview drawn with reverted order



On 25 Sep 2009, at 08:26, gMail.com wrote:


Thanks to all of you.
Anyway, I must compile for Tiger, so how can I workaround this  
trouble?

I thought to programmatically move the subviews to the right position.
Am I right?


No. For Tiger and earlier, overlapping views are not supported. You  
will get all sorts of strange results. You need to either make one  
view a subview of the other, or write some custom drawing and event  
handling code to give the impression of overlapping views.


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Re: How to create a control just as RGB Sphere and Alpha bar

2009-09-25 Thread Florian Soenens

http://www.google.com/search?client=safarirls=en-usq=cocoa+get+pixel+rgb+valueie=UTF-8oe=UTF-8

Florian.

On 25 Sep 2009, at 09:12, Symadept wrote:

Hi Graham,
I tried to display the RGB spectrum as an image in the view. How can
I pick

particular pixel color from that image. Does it make sense?

-Mustafa

On Fri, Sep 25, 2009 at 2:29 PM, Graham Cox graham@bigpond.com
wrote:

tsk, tsk - lazy, lazy.

http://mattgemmell.com/2008/12/08/what-have-you-tried

http://catb.org/~esr/faqs/smart-questions.html

C'mon, get real. No-one's going to write your code for you. If you
can't
find a free class somewhere, subclass NSView yourself. A location
-- RGB

mapping is pretty easy.

--Graham

On 25/09/2009, at 4:20 PM, Symadept wrote:

Hi Graham,

Yes. But do you have any other ways to handle this.

I want something like this

I could be able to pick the color from the spectrum band and could
change
the Alpha (This I can manage to some extent, Immediately I need to
handle

the picking colour from the spectrum.)

Regards
Mustafa

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Advice on debugging a GC related crash

2009-09-25 Thread Harry Jordan

I've just released my first application, and despite the best efforts  
of me and an admitedly small group of beta testers it seems that a  
crashers slipped through. So far this one has only effected 1 user out  
of maybe 500:


OS: 10.6.1

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x182365ed
Crashed Thread:  3  Dispatch queue: Garbage Collection Work Queue

Thread 3 Crashed:  Dispatch queue: Garbage Collection Work Queue
0   com.apple.CoreFoundation  	0x95c6c393  
__CFTypeCollectionRelease + 83
1   com.apple.CoreFoundation  	0x95c68eb8  
__CFBasicHashStandardCallback + 296

2   com.apple.CoreFoundation0x95c68b78 __CFBasicHashDrain + 568
3   com.apple.Foundation  	0x92a20f64 -[NSCFDictionary  
finalize] + 45

4   libobjc.A.dylib 0x9724618d finalizeOneObject + 59
5   libauto.dylib 	0x9769d612 Auto::foreach_block_do 
(auto_zone_cursor*, void (*)(void*, void*), void*) + 66

6   libobjc.A.dylib 0x97245e0e batchFinalize + 247
7   libobjc.A.dylib   	0x97245e92  
batchFinalizeOnTwoThreads + 104
8   libauto.dylib 	0x97696cd9  
Auto::Zone::invalidate_garbage(unsigned long, unsigned int const*) + 89
9   libauto.dylib 	0x97687a65 auto_collect_internal 
(Auto::Zone*, int) + 645
10  libauto.dylib 	0x976882ac auto_collection_work 
(Auto::Zone*) + 140
11  libSystem.B.dylib 	0x967977b8  
_dispatch_call_block_and_release + 16
12  libSystem.B.dylib 	0x9678a144 _dispatch_queue_drain +  
249
13  libSystem.B.dylib 	0x96789b77 _dispatch_queue_invoke +  
53
14  libSystem.B.dylib 	0x9678998a _dispatch_worker_thread2  
+ 234

15  libSystem.B.dylib   0x96789401 _pthread_wqthread + 390
16  libSystem.B.dylib   0x96789246 start_wqthread + 30


Thread 3 crashed with X86 Thread State (32-bit):
 eax: 0xa0821ca0  ebx: 0x95c6c354  ecx: 0x182365e8  edx: 0x01798fd0
 edi: 0x182365ec  esi: 0x182365e8  ebp: 0xb0291a78  esp: 0xb0291a50
  ss: 0x001f  efl: 0x00010246  eip: 0x95c6c393   cs: 0x0017
  ds: 0x001f   es: 0x001f   fs: 0x001f   gs: 0x0037
 cr2: 0x182365ed

I haven't been able to reproduce this problem on my machine or any of  
the other machines that I've tested on and I'm a bit lost as to how to  
go about reproducing it never mind fixing it.

Any advice would be most appreciated.
Cheers
Harry
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Best way to implement drag and drop for multiple types of nstableview

2009-09-25 Thread Paul Bruneau


Hi-

I have used mmalc's DNDArrayController class from his Bookmarks  
example code to implement drag and drop for one of my NSTableViews. Of  
course it works great.


But now I would like to set up a couple other table views with other  
types of data.


I can re-use my DNDArrayController, but then the interface thinks a  
user can drag between two tables with totally different types of data  
in them.


I can copy the class files and set up the new drag types in the  
copies, but I feel the urge to resist having multiple nearly identical  
classes of DNDArrayController lying around.


I guess I could subclass DNDArrayController and have a method that  
returns the data types for that particular subclass. That one doesn't  
sound too evil.


Can anyone provide some guidance on the correct way to set up these  
multiple NSTableViews with drag and drop?


Thanks
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proper technique for CoreData SQLite fetch with sort descriptors

2009-09-25 Thread Jim Thomason

First off, I'll say that I'm trying to maintain Tiger compatibility in
my app, so if anyone tries to duplicate this on Leopard or Snow
Leopard, they may not have any luck.

I have an NSArrayController bound to a set of objects in an SQLite
CoreData store. The NSArrayController by default has several
NSSortDescriptors associated with it to properly order the objects
(since there are several properties to sub-sort on).

One of those, however, causes it to blow up badly - specifically, I
have it set on keyPath creator.classRank, where classRank is a
method sitting up in my object class that isn't appropriate to stick
into my data store. I get an error about an unresolved keyPath for
creator.classRank. Some digging around yielded this post:

http://lists.apple.com/archives/Cocoa-dev/2005/Aug/msg00797.html

Which is basically the same issue that I'm having - in my case, it's
the keyPath that doesn't exist in the SQLite store that's causing the
fetch to fail. To address it, I overrode fetchWithRequest:merge:error:
in my NSArrayController subclass, as such:

- (BOOL)fetchWithRequest:(NSFetchRequest *)fetchRequest
merge:(BOOL)merge error:(NSError **)error {

//Make a copy of the fetchRequest's sortDescriptors
NSMutableArray* safeSortDescriptors = [NSMutableArray
arrayWithArray:[fetchRequest sortDescriptors]];

//pull out the classRankSortDescriptor (this is a static class
variable which is used initially to populate the controller's
sortDescriptors during awakeFromNib
[safeSortDescriptors removeObject:classRankSortDescriptor];

//reset the sort descriptors to the sanitized version, without the
offending descriptor
[fetchRequest setSortDescriptors:safeSortDescriptors];

//carry on our merry way
return [super fetchWithRequest:fetchRequest merge:merge error:error];
}

This works fine, and I'm not seeing any issues. Proper behavior on
Tiger, Leopard, and Snow Leopard. The fetch executes just fine, and
then the original sort descriptors (with creator.classRank) in my
NSArrayController subclass sort my data appropriately.

I have two questions -
1) Is this the proper technique to use to address this issue? Or is
there a different method I should subclass or technique I should use
instead? This feels kinda hackish, so I want to be sure I'm doing it
the right way.

2) I didn't seem to have any problems just leaving the new sort
descriptor in place on either Leopard or Snow Leopard, this is purely
a Tiger issue. Can anyone confirm if this behavior has changed and
this hack is no longer necessary on Leopard or higher? I wasn't sure
if the behavior had changed to allow this, or if I'd just gotten lucky
somehow due to an unrelated changed in the OS.

Thanks,

-Jim...
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Re: Advice on debugging a GC related crash

2009-09-25 Thread Bill Bumgarner



On Sep 25, 2009, at 4:32 AM, Harry Jordan wrote:


Thread 3 Crashed:  Dispatch queue: Garbage Collection Work Queue
0   com.apple.CoreFoundation  	0x95c6c393  
__CFTypeCollectionRelease + 83
1   com.apple.CoreFoundation  	0x95c68eb8  
__CFBasicHashStandardCallback + 296

2   com.apple.CoreFoundation0x95c68b78 __CFBasicHashDrain + 568
3   com.apple.Foundation  	0x92a20f64 -[NSCFDictionary  
finalize] + 45

4   libobjc.A.dylib 0x9724618d finalizeOneObject + 59
5   libauto.dylib 	0x9769d612 Auto::foreach_block_do 
(auto_zone_cursor*, void (*)(void*, void*), void*) + 66


Check the crash log for libraries that you don't recognize that aren't  
from Apple.   It might be that the user has some random bit of  
driverware that is buggy.  That has been the typical source of a crash  
like this where only 1 of many users see this.  In particular, there  
were a couple of random web cam type things that seemed to have been  
the source of this kind of failure.


The other source has been bundle unloading.   Unloading of bundles in  
Objective-C is incredibly hard to get right.  Hard to the point of  
considering it truly unsupported.  If a bundle was unloaded and there  
was a reference to an NSString constant in that bundle and the string  
had been put into a dictionary that was later collected after unload,  
you'll see a crash like this.


The best evidence in this case will be a hole in the addresses of the  
dylibs.  If you are really lucky, register %eax (on i386, anyway) will  
contain an address that points to the hole.


In any case, ask the user what kind of software/hardware they have  
installed that is of the non-app persuasion.


b.bum
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Scrolling a NSTextField

2009-09-25 Thread JECKER Frédéric

Hi,
I have an non-editable/selectable NSTextField which content is set
programatically (and the field's layout attribute is set to Scroll).
Now when the field is filled, the overflow text is not displayed despite the
Scroll attribute.
When turning the fied selectable/editable this works fine : as soon as the
content is bigger than the field's size,
its content is immediately scrolled to the cursor position.

Is there a way to perform this behaviour manually ?

Thanks
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Re: Correct way to tell if a path is to a .bundle?



On Sep 24, 2009, at 9:51 PM, Rick Mann wrote:

Thanks Jens. If I create a custom extension for my plugins (not even  
sure I can do that), will this still work?


Yup, as long as you declare the extension properly in your Info.plist  
and indicate that it's a bundle.


—Jens___

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Re: Remove NSTableView Default Selection

2009-09-25 Thread Corbin Dunn



On Sep 24, 2009, at 8:12 PM, Jens Alfke wrote:



On Sep 24, 2009, at 5:07 PM, John McIntosh wrote:


I assumed that I could send the same deselectAll message in either an
awakeFromNib function or applicationDidFinishLaunching. However,
neither of these clears the selection.


Make sure you've checked the table's Empty checkbox (allow empty  
selection) in the nib.
Also, if there's a controller bound to the table, uncheck its Avoid  
empty selection checkbox.


Some additional information to what Jens said:

action based methods, like the user selecting a row, -deselectAll:  
and -selectAll:, respect the allows empty selection setting and will  
keep an item selected if turned off and if possible.


Programmer methods will override that behavior. So, if you call [table  
selectRowIndexes:[NSIndexSet indexSet] byExtendingSelection:NO], you  
should still be able to get an empty selection.


corbin


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Re: How to create a control just as RGB Sphere and Alpha bar



On Sep 25, 2009, at 3:02 AM, Florian Soenens wrote:


http://www.google.com/search?client=safarirls=en-usq=cocoa+get+pixel+rgb+valueie=UTF-8oe=UTF-8


In this case it might be better to check http://lmgtfy.com/?q=cocoa+get+pixel+rgb+value 
 first. One of my favorite references in these sorts of cases.


—Jens___

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Re: [__NSFastEnumerationEnumerator nextObject] unexpectedly not very fast!

2009-09-25 Thread James Bucanek

Graham Cox mailto:graham@bigpond.com wrote (Thursday, 
September 24, 2009 6:10 PM +1000):

I thought that NSEnumerator was implemented in terms of fast enumeration
underneath - the docs seem to imply that, as does the existence of
__NSFastEnumerationEnumerator private class. It may be still slower than
directly using the fast enumeration syntax, but isn't there some gain to be
had? I have hundreds of these enumeration loops and I still need to support
10.4; I thought I was getting *some* benefit automagically from fast
enumeration on 10.5+


No one replied to your questiona directly, so I'll throw in my 
two cents.


Fast enumeration is a 10.5+ObjC2.0 feature only and is 
implemented as an alternate method of enumeration. NSEnumerator 
in 10.5 is not built on top of fast enumeration or vise versa. 
The reason is simple: fast enumeration achieves most of its 
speed improvement by fetching objects in batches. The interface 
to NSEnumerator fetches one object at a time, so nothing 
underneath it is going to avoid the overhead of the per-object 
message that it already incurs.


What's mentioned in the documentation is that NSEnumerator 
implements the fast enumeration protocol *in order to be 
compatible with* fast enumeration syntax. This means that you 
can use any NSEnumerator object as the subject of a fast 
enumeration statement in Objective-C 2.0:


NSEnumerator *e = [collection enumerator];
for ( id i in e ) ...

But this is not optimized; fast enumeration just calls [e 
nextObject] once for each object, so it isn't any faster than 
using the NSEnumerator. The only thing you've saved is typing.


In summary, the existence of fast enumeration does nothing for 
existing enumeration technologies and if you have to support 
10.4 (as I do) you simply can't use it unless you fork your code.


My solution, in the few cases where performance is paramount, 
has been to essentially roll my own fast enumeration. For very 
large arrays (thousands of objects) I'll get blocks of objects 
in batching using [NSArray getObjects:range:], process those in 
a tight C loop, and then get another batch.



Also, wouldn't methods such as -makeObjectsPerformSelector:withObject: and
CFArrayApplyFunction(...) gain some benefit from fast enumeration? I use these
a lot too.


I'm sure these kinds of functions are optimized internally and 
probably don't use enumerator objects or fast enumeration. But 
that's just a guess. The rule is, as always, don't worry about 
it unless it's a problem, then profile it, find the bottleneck, 
and work around it.

--
James Bucanek

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Re: Remove NSTableView Default Selection

2009-09-25 Thread John McIntosh

Perfect, thank you! I have the table bound to a core data source and
did not know about the avoid empty selection option in the
controller. Unckecking that box took care of it.

John

On Thu, Sep 24, 2009 at 10:12 PM, Jens Alfke j...@mooseyard.com wrote:

 On Sep 24, 2009, at 5:07 PM, John McIntosh wrote:

 I assumed that I could send the same deselectAll message in either an
 awakeFromNib function or applicationDidFinishLaunching. However,
 neither of these clears the selection.

 Make sure you've checked the table's Empty checkbox (allow empty
 selection) in the nib.
 Also, if there's a controller bound to the table, uncheck its Avoid empty
 selection checkbox.

 —Jens
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Subclass of NSView not responding to mouseDown event

2009-09-25 Thread Paul Buxton

Hi guys. I am working though the book 'Learning Cocoa with Objective-C 2nd
edition and have reached the Dot View example. It is a simple app that
should demonstrate responding to mouse events. Apart from having to cope
with the difference between the version of X-Code the book was developed
with, and the more up to date version I am using, I haven't had any trouble
with the book until now. I created a class DotView which is a subclass of
NSView.
I Added a Custom view to my app and set it's class to be DotView.
In the DotView class I have implemented the mouseDown event handler, but I
do not seem to be getting the events.

I do get some build warnings that the DotView class may not respond to the
needsDrawing message, and when typing the code the autocomplete doesn't
suggest mouseDown as an option.
It seems as though it hasn't really made it a subclass of NSView, any
thoughts?

Looking through the lists I saw some suggestions to previous questions that
suggested adding the acceptsFirstMouse and acceptsFirstResponder methods, so
I have added those as well, but still no luck.


Sample code below.

//

//  DotView.h

//

//  Created by Paul Buxton on 25/09/2009.

//  Copyright 2009 __MyCompanyName__. All rights reserved.

//


#import Cocoa/Cocoa.h


@interface DotView : NSView {

IBOutlet NSColorWell *colorWell;

IBOutlet NSSlider *slider;

 NSPoint center;

NSColor *color;

float radius;

}


- (IBAction)setColor:(id)sender;

- (IBAction)setRadius:(id)sender;

@end

//

//  DotView.m

//

//  Created by Paul Buxton on 25/09/2009.

//  Copyright 2009 __MyCompanyName__. All rights reserved.

//


#import DotView.h



@implementation DotView


-(id)initWithFrame:(NSRect)frameRect

{

self = [super initWithFrame:frameRect];

center.x=50.0;

center.y=50.0;

radius=20;

color = [[NSColor redColor] retain];

return self;


}


-(void)awakeFromNib

{

[colorWell setColor:color];

[slider setFloatValue:radius];


}


-(void)dealloc

{

[color release];

[super dealloc];

}


-(void)drawRect:(NSRect)dirtyRect

{

NSRect dotRect;

 [[NSColor whiteColor] set];

NSRectFill([self bounds]);

 dotRect.origin.x = center.x - radius;

dotRect.origin.y = center.y - radius;

 dotRect.size.width = 2*radius;

dotRect.size.height = 2*radius;

 [color set];

[[NSBezierPath bezierPathWithOvalInRect:dotRect] fill];


}


-(BOOL)isOpaque

{

return YES;

}



-(void)mouseDown:(NSEvent *)event

{

NSPoint eventlocation = [event locationInWindow];

center = [self convertPoint:eventlocation fromView:nil];

[self needsDisplay:YES];


}



- (IBAction)setColor:(id)sender {



NSColor *newColor = [sender color];

[newColor retain];

[color release];

color = newColor;

[self needsDisplay:YES];

}


- (IBAction)setRadius:(id)sender {

radius = [sender floatValue];

[self needsDisplay:YES];

}


-(BOOL)acceptsFirstMouse:(NSEvent *)theEvent

{

return YES;

}


-(BOOL)acceptsFirstResponder

{

return YES;

}

@end


Cheers,
Paul
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Re: NSTableView Drag Drop as a string

2009-09-25 Thread Todd Heberlein


Solved it!

... But now I want to create a string representation of the object,  
add it to the pasteboard as well, and then when the object is  
dragged to something like an email, the string representation of the  
object is written in.


The problem was that I was trying to do a cross-application drag and  
drop. The solution was to add to my -awakeFromNib method the line:


[myTableView setDraggingSourceOperationMask:NSDragOperationEvery  
forLocal:NO];


This allows drag-and-drop across applications.

Todd

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Re: Correct way to tell if a path is to a .bundle?

2009-09-25 Thread Sean McBride

On 9/25/09 8:12 AM, Jens Alfke said:

 Thanks Jens. If I create a custom extension for my plugins (not even
 sure I can do that), will this still work?

Yup, as long as you declare the extension properly in your Info.plist
and indicate that it's a bundle.

Of course that requires that your Info.plist be present for Launch
Services to consult.  So while you should absolutely do as Jens says,
you should additionally set the bundle bit for packages you create.  See
'man SetFile'.  SetFile -a B /path/to/package.  Many apps fail to do
this.  Ever noticed that after a fresh OS install the Finder
shows .xcodeproj packages as folders?  That's why.

--

Sean McBride, B. Eng s...@rogue-research.com
Rogue Researchwww.rogue-research.com
Mac Software Developer  Montréal, Québec, Canada


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Re: Subclass of NSView not responding to mouseDown event



On 25 Sep 2009, at 15:03, Paul Buxton wrote:

Hi guys. I am working though the book 'Learning Cocoa with Objective- 
C 2nd

edition and have reached the Dot View example. It is a simple app that
should demonstrate responding to mouse events. Apart from having to  
cope
with the difference between the version of X-Code the book was  
developed
with, and the more up to date version I am using, I haven't had any  
trouble
with the book until now. I created a class DotView which is a  
subclass of

NSView.
I Added a Custom view to my app and set it's class to be DotView.
In the DotView class I have implemented the mouseDown event handler,  
but I

do not seem to be getting the events.


What makes you say that? Have you tested it in the debugger?


I do get some build warnings that the DotView class may not respond  
to the
needsDrawing message, and when typing the code the autocomplete  
doesn't

suggest mouseDown as an option.
It seems as though it hasn't really made it a subclass of NSView, any
thoughts?


That's because there is no -needsDrawing: or -needsDisplay: method.  
There is however, -setNeedsDisplay: which is almost certainly what you  
want.


Looking through the lists I saw some suggestions to previous  
questions that
suggested adding the acceptsFirstMouse and acceptsFirstResponder  
methods, so

I have added those as well, but still no luck.

You generally don't want -acceptsFirstMouse. Read up on what that  
method does. Either way, neither of these should have an effect on  
whether your class receives a -mouseDown: event.


Sample code below.

//

//  DotView.h

//

//  Created by Paul Buxton on 25/09/2009.

//  Copyright 2009 __MyCompanyName__. All rights reserved.

//


#import Cocoa/Cocoa.h


@interface DotView : NSView {

   IBOutlet NSColorWell *colorWell;

   IBOutlet NSSlider *slider;

NSPoint center;

NSColor *color;

float radius;

}


- (IBAction)setColor:(id)sender;

- (IBAction)setRadius:(id)sender;

@end

//

//  DotView.m

//

//  Created by Paul Buxton on 25/09/2009.

//  Copyright 2009 __MyCompanyName__. All rights reserved.

//


#import DotView.h



@implementation DotView


-(id)initWithFrame:(NSRect)frameRect

{

self = [super initWithFrame:frameRect];

center.x=50.0;

center.y=50.0;

radius=20;

color = [[NSColor redColor] retain];

return self;


}


-(void)awakeFromNib

{

[colorWell setColor:color];

[slider setFloatValue:radius];


}


-(void)dealloc

{

[color release];

[super dealloc];

}


-(void)drawRect:(NSRect)dirtyRect

{

NSRect dotRect;

[[NSColor whiteColor] set];

NSRectFill([self bounds]);

dotRect.origin.x = center.x - radius;

dotRect.origin.y = center.y - radius;

dotRect.size.width = 2*radius;

dotRect.size.height = 2*radius;

[color set];

[[NSBezierPath bezierPathWithOvalInRect:dotRect] fill];


}


-(BOOL)isOpaque

{

return YES;

}



-(void)mouseDown:(NSEvent *)event

{

NSPoint eventlocation = [event locationInWindow];

center = [self convertPoint:eventlocation fromView:nil];

[self needsDisplay:YES];


}



- (IBAction)setColor:(id)sender {



NSColor *newColor = [sender color];

[newColor retain];

[color release];

color = newColor;

[self needsDisplay:YES];

}


- (IBAction)setRadius:(id)sender {

   radius = [sender floatValue];

[self needsDisplay:YES];

}


-(BOOL)acceptsFirstMouse:(NSEvent *)theEvent

{

return YES;

}


-(BOOL)acceptsFirstResponder

{

return YES;

}

@end


Cheers,
Paul
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Quartz 2D or Core Animation?

2009-09-25 Thread Gabriel Zachmann

I am still confused as to whether I should use Core Animation or  
Quartz 2D.


Basically, the task I would like to do is this:
- draw two images with alpha blending in a window (actually, a screen  
saver window)

- grow and shrink the images at 30 frames/sec
- use as little CPU as possible!

Could some kind soul please advise me on which framework would be best  
suited?
I read up all day on Quartz 2D and Core Animation, but I'm still  
confused.

Which one uses the least amount of CPU for the task?

Example code would also be highly appreciated!

Best regards,
Gabriel.



smime.p7s
Description: S/MIME cryptographic signature
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Re: Best way to implement drag and drop for multiple types of nstableview

2009-09-25 Thread I. Savant


On Sep 25, 2009, at 9:25 AM, Paul Bruneau wrote:

I have used mmalc's DNDArrayController class from his Bookmarks  
example code to implement drag and drop for one of my NSTableViews.  
Of course it works great.


But now I would like to set up a couple other table views with other  
types of data.


I can re-use my DNDArrayController, but then the interface thinks a  
user can drag between two tables with totally different types of  
data in them.




Paul:

  Unless I'm missing something, why not add properties to your array  
controller class that keeps track of the desired types? If you use  
multiple tables for the same array controller instance, you could get  
even fancier and keep an association between provided and accepted  
types for each table.


--
I.S.




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Re: Correct way to tell if a path is to a .bundle?



On Sep 25, 2009, at 08:52:40, Sean McBride wrote:


On 9/25/09 8:12 AM, Jens Alfke said:


Thanks Jens. If I create a custom extension for my plugins (not even
sure I can do that), will this still work?


Yup, as long as you declare the extension properly in your Info.plist
and indicate that it's a bundle.


Of course that requires that your Info.plist be present for Launch
Services to consult.  So while you should absolutely do as Jens says,
you should additionally set the bundle bit for packages you create.   
See

'man SetFile'.  SetFile -a B /path/to/package.  Many apps fail to do
this.  Ever noticed that after a fresh OS install the Finder
shows .xcodeproj packages as folders?  That's why.


Thanks to you both for the details!

--
Rick


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Displaying characters from the 'Unicode Symbols' font ??


Hi,

Recently, I installed the 'Unicode Symbols' font.

I would like to diplay all characters in this font.

The problem is, that I do not know how to handle the characters  
outside the 16 bits range. For instance the: Mathematical Alfanumerics  
Symbols in the range 1D400..1D7FF.


Any suggestions are welcome.

Kind regards,

Anders Lassen 
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Re: Displaying characters from the 'Unicode Symbols' font ??

What are you trying to do?  Display them in a grid like the Characters
palette does?  Or typeset them like Font Book does?  Or something
else?

--Kyle Sluder
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Re: Displaying characters from the 'Unicode Symbols' font ??



On Sep 25, 2009, at 7:18 PM, Kyle Sluder wrote:


What are you trying to do?  Display them in a grid like the Characters
palette does?  Or typeset them like Font Book does?  Or something
else?

--Kyle Sluder



Hi Kyle,

I am trying to display them in a custom NSView that displays math. Of  
course not all, at the same time, but single characters when needed in  
a math formula drawing.


For unicode characters in the 16 bits range I use the following code:

   NSGlyph glyph = [font _defaultGlyphForChar:ch];

   NSBezierPath* path = [[NSBezierPath alloc] init];

   [path moveToPoint:NSMakePoint(rect.origin.x,rect.origin.y)];

   [path appendBezierPathWithGlyph:glyph inFont:font];


This works fine for characters in the 16 bits range. Outside this  
range, I am in trouble since input to _defaultGlyphForChar is 16 bit.



Anders Lassen
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re: Re: [__NSFastEnumerationEnumerator nextObject] unexpectedly not very fast!

2009-09-25 Thread Ben Trumbull


In summary, the existence of fast enumeration does nothing for
existing enumeration technologies and if you have to support
10.4 (as I do) you simply can't use it unless you fork your code.

My solution, in the few cases where performance is paramount,
has been to essentially roll my own fast enumeration. For very
large arrays (thousands of objects) I'll get blocks of objects
in batching using [NSArray getObjects:range:], process those in
a tight C loop, and then get another batch.


The for (in) construct is by far the most optimized general purpose  
way to work with any of the collections in Cocoa on 10.5, 10.6, and  
iPhone OS.  It's also polymorphic, so custom collection subclasses can  
fine tune the behavior.


If you have to hand roll your own, either for 10.4, or some  
specialized case, your best bet is to use -getObjects: into a local  
buffer.  gcc supports variable length arrays, and that's the fastest  
way to marshall these batches temporarily.  You'll want to be very  
careful to do length checks to not overrun your stack, and limit the  
size.  If you have somewhere between 256  512 objects, give or take,  
you'll have to malloc a temporary id*  Overflowing the stack is not  
pretty.


- Ben



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Re: Displaying characters from the 'Unicode Symbols' font ??

On Fri, Sep 25, 2009 at 10:34 AM, Anders Lassen anders.las...@mac.com wrote:
 I am trying to display them in a custom NSView that displays math. Of course
 not all, at the same time, but single characters when needed in a math
 formula drawing.

Sounds like you're subverting the Cocoa text system.  Not a good idea.
 Perhaps you should subclass NSLayoutManager to create custom text
containers, and NSTypesetter to lay out your math text.

 For unicode characters in the 16 bits range I use the following code:
    NSGlyph glyph = [font _defaultGlyphForChar:ch];

I don't see this method documented anywhere.  Meanwhile, CTFont has
CTFontGetGlyphsForCharacters and CTFontGetGlyphWithName (which is what
you're probably going to want).

--Kyle Sluder
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Re: How to create a control just as RGB Sphere and Alpha bar

2009-09-25 Thread Steve Christensen

Is there some reason why you can't use the color picker to specify a  
color+alpha value? It would save you a bunch of work in duplicating  
existing system functionality.



On Sep 24, 2009, at 11:20 PM, Symadept wrote:


Hi Graham,
Yes. But do you have any other ways to handle this.

I want something like this


I could be able to pick the color from the spectrum band and could  
change
the Alpha (This I can manage to some extent, Immediately I need to  
handle

the picking colour from the spectrum.)

Regards
Mustafa

On Fri, Sep 25, 2009 at 1:41 PM, Graham Cox  
graham@bigpond.com wrote:




On 25/09/2009, at 1:14 PM, Symadept wrote:

 Can any help me how to create a view which contains Spectrum Bar  
(Just as

RGB Sphere in NSColorPanel) and an Alpha bar?



NSImageView?

--Graham


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Re: Displaying characters from the 'Unicode Symbols' font ??

2009-09-25 Thread Douglas Davidson



On Sep 25, 2009, at 10:34 AM, Anders Lassen wrote:

I am trying to display them in a custom NSView that displays math.  
Of course not all, at the same time, but single characters when  
needed in a math formula drawing.


For unicode characters in the 16 bits range I use the following code:

  NSGlyph glyph = [font _defaultGlyphForChar:ch];

  NSBezierPath* path = [[NSBezierPath alloc] init];

  [path moveToPoint:NSMakePoint(rect.origin.x,rect.origin.y)];

  [path appendBezierPathWithGlyph:glyph inFont:font];


This works fine for characters in the 16 bits range. Outside this  
range, I am in trouble since input to _defaultGlyphForChar is 16 bit.


If all you want to do is to display a character in a given font, the  
string drawing APIs will work just fine for that.  If you really need  
to have a bezier path, don't use the code you show here; we have a  
sample showing how to get a bezier path from text--look at  
bezierWithFont: in http://developer.apple.com/mac/library/samplecode/SpeedometerView/listing9.html 
.


Douglas Davidson

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Re: Displaying characters from the 'Unicode Symbols' font ??

Hi,

Thanks this was helpful.

Now I can drop _defaultGlyphForChar for a better solution.

But still, I can not see, how this solve my problem getting characters
outside the unicode 16 bits range into a NSString.

Anders Lassen

On Sep 25, 2009, at 8:03 PM, Douglas Davidson wrote:

On Sep 25, 2009, at 10:34 AM, Anders Lassen wrote:

I am trying to display them in a custom NSView that displays math.
Of course not all, at the same time, but single characters when
needed in a math formula drawing.

For unicode characters in the 16 bits range I use the following code:

NSGlyph glyph = [font _defaultGlyphForChar:ch];

NSBezierPath* path = [[NSBezierPath alloc] init];

[path moveToPoint:NSMakePoint(rect.origin.x,rect.origin.y)];

[path appendBezierPathWithGlyph:glyph inFont:font];

This works fine for characters in the 16 bits range. Outside this
range, I am in trouble since input to _defaultGlyphForChar is 16 bit.

If all you want to do is to display a character in a given font, the
string drawing APIs will work just fine for that. If you really
need to have a bezier path, don't use the code you show here; we
have a sample showing how to get a bezier path from text--look at
bezierWithFont: in http://developer.apple.com/mac/library/samplecode/SpeedometerView/listing9.html
.

Douglas Davidson

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Disappearing NSStatusItem

2009-09-25 Thread Jacob Schwartz


Hello again,

After making headway on my first cocoa app, I have run into an issue.  
I have created a NSStatusItem in my class called Application.m. When I  
run, the icon appears in my menubar but then disappears and becomes  
ineligable to click. I read something somewehere about thr garbage  
collection taking it away but I have it saved as an instance in my  
class so Im out of ideas. I also read about the AppDelegate class that  
is made for me when I make a new project but I don't know how to use  
that. Fail. Anyway thanks again everyone.


-Jake
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Re: Displaying characters from the 'Unicode Symbols' font ??

2009-09-25 Thread Douglas Davidson



On Sep 25, 2009, at 11:18 AM, Anders Lassen wrote:

But still, I can not see, how this solve my problem getting  
characters outside the unicode 16 bits range into a NSString.


NSString is conceptually UTF-16, which means that characters outside  
the BMP are represented using surrogate pairs.  However, for purposes  
of getting them into an NSString, you can (for example) represent them  
in UTF-32 and use one of the conversion methods.  Alternatively, you  
could put them in a file, maybe a text file or a plist, and let the  
standard import methods deal with encoding issues.


Douglas Davidson

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Re: Displaying characters from the 'Unicode Symbols' font ??


Hi Kyle,

I will try to get the glyph name somewhere on the unicode website.

Instead of the methods you suggest I will use:

  NSGlyph name = [font glyphWithName:@summation];

Thanks.

Anders Lassen


On Sep 25, 2009, at 7:39 PM, Kyle Sluder wrote:

On Fri, Sep 25, 2009 at 10:34 AM, Anders Lassen  
anders.las...@mac.com wrote:
I am trying to display them in a custom NSView that displays math.  
Of course
not all, at the same time, but single characters when needed in a  
math

formula drawing.


Sounds like you're subverting the Cocoa text system.  Not a good idea.
Perhaps you should subclass NSLayoutManager to create custom text
containers, and NSTypesetter to lay out your math text.


For unicode characters in the 16 bits range I use the following code:
   NSGlyph glyph = [font _defaultGlyphForChar:ch];


I don't see this method documented anywhere.  Meanwhile, CTFont has
CTFontGetGlyphsForCharacters and CTFontGetGlyphWithName (which is what
you're probably going to want).

--Kyle Sluder


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Re: Displaying characters from the 'Unicode Symbols' font ??

2009-09-25 Thread James Walker


Anders Lassen wrote:

But still, I can not see, how this solve my problem getting characters 
outside the unicode 16 bits range into a NSString.


If these are a few specific characters, you can look them up in the 
Character Viewer window to convert them to UTF-16 pairs.  For example, 
if you look up the character 1D400, under Character Info it shows that 
this is D835+DC00.

--
  James W. Walker, Innoventive Software LLC
  http://www.frameforge3d.com/
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Re: login items hide box

2009-09-25 Thread Jerry Krinock


On 2009 Sep 24, at 06:25, Rick C. wrote:

so i do need to update my code.  but i'll be on the lookout for  
potential LSSharedFileList issues.  thank you!


Just to clarify, unless Apple has silently fixed the bug in 10.6 and  
you're using 10.6, I expect that you will see the same issue after  
updating to LSSharedFileList.  Also, LSSharedFileList has another bug  
-- a difficult API with not much documentation.  Two other developers  
have told me that they've found my Cocoa wrapper helpful...


  http://sheepsystems.com/sourceCode/ssyloginitems.html

If you find that Apple has fixed the bug in 10.6, do let us know.


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Re: Displaying characters from the 'Unicode Symbols' font ??


I have tried this but gave up, because I did not now of surrogate pairs.

But I will try again.

Anders Lassen

On Sep 25, 2009, at 8:27 PM, Douglas Davidson wrote:



On Sep 25, 2009, at 11:18 AM, Anders Lassen wrote:

But still, I can not see, how this solve my problem getting  
characters outside the unicode 16 bits range into a NSString.


NSString is conceptually UTF-16, which means that characters outside  
the BMP are represented using surrogate pairs.  However, for  
purposes of getting them into an NSString, you can (for example)  
represent them in UTF-32 and use one of the conversion methods.   
Alternatively, you could put them in a file, maybe a text file or a  
plist, and let the standard import methods deal with encoding issues.


Douglas Davidson



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Re: Displaying characters from the 'Unicode Symbols' font ??

2009-09-25 Thread Aki Inoue

The Unicode values beyond 16bit range are represented with a pair of  
UTF-16 characters in U+D800 ~ U+DFFF.


See relevant items in http://unicode.org/glossary/#S for the  
definitions.


There are several ways to insert UTF-32 values into NSString.
Doug mentioned some.

The easiest is to use the C99 universal character name.

For example, U+1D400 can be represented with @\U0001D400 using  
compliers shipped with Xcode 3.0 or later.


Another approach is to use an array of UTF-32 characters and convert  
with NSUTF32StringEncoding.


UTF32Char character = 0x0001D400;
#if __BIG_ENDIAN__
NSStringEncoding encoding = NSUTF32BigEndianStringEncoding;
#else
NSStringEncoding encoding = NSUTF32LittleEndianStringEncoding;
#endif
NSString *string = [[NString alloc] initWithBytes:character  
length:sizeof(character) encoding:encoding];


Or, you could fill a UTF-16 buffer and create from it using new inline  
functions introduced with SnowLeopard.

UniChar characters[2];
NSString *string;

CFStringGetSurrogatePairForLongCharacter(0x0001D400, characters);
string = [[NSString alloc] initWithCharacters:characters length:2];

Aki

On 2009/09/25, at 11:33, Anders Lassen wrote:

I have tried this but gave up, because I did not now of surrogate  
pairs.


But I will try again.

Anders Lassen

On Sep 25, 2009, at 8:27 PM, Douglas Davidson wrote:



On Sep 25, 2009, at 11:18 AM, Anders Lassen wrote:

But still, I can not see, how this solve my problem getting  
characters outside the unicode 16 bits range into a NSString.


NSString is conceptually UTF-16, which means that characters  
outside the BMP are represented using surrogate pairs.  However,  
for purposes of getting them into an NSString, you can (for  
example) represent them in UTF-32 and use one of the conversion  
methods.  Alternatively, you could put them in a file, maybe a text  
file or a plist, and let the standard import methods deal with  
encoding issues.


Douglas Davidson



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Re: Quartz 2D or Core Animation?

2009-09-25 Thread douglas welton


Gabriel,

The quick answer is use both.  The two are not mutually exclusive.

Also, don't worry about CPU usage until you built v1.0 of your  
project.  Then, go back and the performance tools to optimize.


regards,

douglas

On Sep 25, 2009, at 12:17 PM, Gabriel Zachmann wrote:

I am still confused as to whether I should use Core Animation or  
Quartz 2D.


Basically, the task I would like to do is this:
- draw two images with alpha blending in a window (actually, a  
screen saver window)

- grow and shrink the images at 30 frames/sec
- use as little CPU as possible!

Could some kind soul please advise me on which framework would be  
best suited?
I read up all day on Quartz 2D and Core Animation, but I'm still  
confused.

Which one uses the least amount of CPU for the task?

Example code would also be highly appreciated!

Best regards,
Gabriel.


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Parsing error in NSEvent?

2009-09-25 Thread slasktrattena...@gmail.com

Hi,

First: I'm not able to get online in 10.6 just yet and so haven't been
able to read the new docs, in case this is something really obvious.

Problem: I've got a screen saver that no longer runs on 10.6, System
Preferences tells me. So I launched Xcode in order to try and figure
out why, but didn't get very far. When trying to build the screen
saver for 10.6, the compiler failed with a parsing error in NSEvent.h,
complaining about an undefined NX_SUBTYPE_MOUSE_TOUCH (declared in the
last block of code):

#if MAC_OS_X_VERSION_MAX_ALLOWED = MAC_OS_X_VERSION_10_4
enum {/* event subtypes for mouse events */
NSMouseEventSubtype = NX_SUBTYPE_DEFAULT,
NSTabletPointEventSubtype   = NX_SUBTYPE_TABLET_POINT,
NSTabletProximityEventSubtype   = NX_SUBTYPE_TABLET_PROXIMITY,
#if MAC_OS_X_VERSION_MAX_ALLOWED = MAC_OS_X_VERSION_10_6
NSTouchEventSubtype = NX_SUBTYPE_MOUSE_TOUCH // FAILS HERE
#endif
};
#endif

What's up with this and is there a way to fix it?

Thanks!
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Re: Correct way to tell if a path is to a .bundle?



On Sep 25, 2009, at 02:25:30, Mike Abdullah wrote:

I would read up on UTIs. Get the type of each file and see if it  
conforms to what you require.


I have what I hope is a reasonably informative post here:
http://www.mikeabdullah.net/utis_diagram/

Note how there is a com.apple.plugin type. If you're using a custom  
format for your plug-ins (and you should), make your app declare a  
com.foo.app.plugin type for them, which conforms to com.apple.plugin.


On Sep 25, 2009, at 08:12:41, Jens Alfke wrote:

Yup, as long as you declare the extension properly in your  
Info.plist and indicate that it's a bundle.



I confess, that after reading the docs, I'm not at all sure I'm doing  
things right. Here's what I've got (for my app called Foo):


keyUTExportedTypeDeclarations/key
array
dict
keyUTTypeDescription/key
stringFoo PlugIn/string
keyUTTypeConformsTo/key
array
stringcom.apple.plugin/string
/array
keyUTTypeIdentifier/key
stringcom.latencyzero.foo.plugin/string
keyUTTypeTagSpecification/key
dict
keypublic.filename-extension/key
stringfooplugin/string
/dict
/dict
/array

keyCFBundleDocumentTypes/key
array
dict
keyCFBundleTypeExtensions/key
array
string.fooplugin/string
/array
keyCFBundleTypeName/key
stringPlugIn/string
keyCFBundleTypeRole/key
stringEditor/string
keyLSItemContentTypes/key
array
stringcom.latencyzero.foo.plugin/string
/array
keyLSTypeIsPackage/key
false/
keyNSPersistentStoreTypeKey/key
stringXML/string
/dict


The CFBundleDocumentTypes was created using the Target-Properties- 
Document Types editor.


Questions:

1) Do I need to put the UTI in my plugin's Info.plist, or just the  
app's, or both?

2) Is there a MIME type for my plugin? OSType? Class?
3) If I don't specify an icon, will it get the default plugin icon?
4) How do I indicate that the type is a bundle (Jens)?
5) Do I need to import UTIs anywhere?

On Sep 25, 2009, at 08:52:40, Sean McBride wrote:


Of course that requires that your Info.plist be present for Launch
Services to consult.  So while you should absolutely do as Jens says,
you should additionally set the bundle bit for packages you create.   
See

'man SetFile'.  SetFile -a B /path/to/package.


I guess this would this be part of a script run after the plugin build?

Thanks!

--
Rick


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Suggestions for debugging “EXC_BAD_ACCES S”

2009-09-25 Thread Bob Barnes


all,

My iPhone app has a UIView subclass that uses a number of CALayer  
objects. In normal operation the app works fine, but in low memory  
conditions (either real or simulated) I'm getting a EXC_BAD_ACCESS  
failure and I suspect it's related to my use (or misuse) of CALayer's.  
I've been concentrating my efforts on this particular UIView subclass  
because it's the last object to have its dealloc messagecalled before  
the crash. As I'm still fairly new developing with Cocoa I'm looking  
for suggestions on how others debug these kinds of errors. The stack  
at the point of failure is:


#0  0x007d40c0 in CFGetRetainCount
#1  0x00963770 in CA::release_root_if_unused
#2  0x00963707 in x_hash_table_remove_if
#3  0x009634ec in CA::Transaction::commit
#4  0x0096b838 in CA::Transaction::observer_callback
#5  0x007b8252 in __CFRunLoopDoObservers
#6  0x007b765f in CFRunLoopRunSpecific
#7  0x007b6c48 in CFRunLoopRunInMode
#8  0x000737ad in GSEventRunModal
#9  0x00073872 in GSEventRun
#10 0x0168a003 in UIApplicationMain
#11 0x1ee0 in main at main.m:14

or from the actual crash log:

0   libobjc.A.dylib 0x955b2688 objc_msgSend + 24
1   QuartzCore	0x00963770  
CA::release_root_if_unused(_CALayer*, _CALayer*, void*) + 18
2   QuartzCore	0x00963707 x_hash_table_remove_if +  
67
3   QuartzCore	0x009634ec  
CA::Transaction::commit() + 214
4   QuartzCore	0x0096b838  
CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned  
long, void*) + 84

5   CoreFoundation 0x007b8252 __CFRunLoopDoObservers + 594
6   CoreFoundation 0x007b765f CFRunLoopRunSpecific + 2575
7   CoreFoundation 0x007b6c48 CFRunLoopRunInMode + 88
8   GraphicsServices   0x000707ad GSEventRunModal + 217
9   GraphicsServices   0x00070872 GSEventRun + 115
10  UIKit   0x0168a003 UIApplicationMain + 1157
11  0x1ee0 main + 102 (main.m:14)
12  0x1e4e start + 54


  If I'm reading this correctly, not a given by any means, Core  
Foundation is trying to get the retain count for an object, possibly a  
CALayer, where the reference pointer is no longer valid, but how do I  
determine what object? I've tried running with the performance tools,  
which tells me where objects are allocated, but I haven't found  
anything that will help identify THE object that's causing the  
problem. I've tried Shark, but it just seems to hang with  
Sampling Any and all suggestions welcome.


thanks,

Bob


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Re: Displaying characters from the 'Unicode Symbols' font ?? (Solved)


Thanks everyone for helping.

This solved my problem on how to handle characters outside the 16 bits  
range.


Anders Lassen

On Sep 25, 2009, at 8:57 PM, Aki Inoue wrote:

The Unicode values beyond 16bit range are represented with a pair of  
UTF-16 characters in U+D800 ~ U+DFFF.


See relevant items in http://unicode.org/glossary/#S for the  
definitions.


There are several ways to insert UTF-32 values into NSString.
Doug mentioned some.

The easiest is to use the C99 universal character name.

For example, U+1D400 can be represented with @\U0001D400 using  
compliers shipped with Xcode 3.0 or later.


Another approach is to use an array of UTF-32 characters and convert  
with NSUTF32StringEncoding.


UTF32Char character = 0x0001D400;
#if __BIG_ENDIAN__
NSStringEncoding encoding = NSUTF32BigEndianStringEncoding;
#else
NSStringEncoding encoding = NSUTF32LittleEndianStringEncoding;
#endif
NSString *string = [[NString alloc] initWithBytes:character  
length:sizeof(character) encoding:encoding];


Or, you could fill a UTF-16 buffer and create from it using new  
inline functions introduced with SnowLeopard.

UniChar characters[2];
NSString *string;

CFStringGetSurrogatePairForLongCharacter(0x0001D400, characters);
string = [[NSString alloc] initWithCharacters:characters length:2];

Aki

On 2009/09/25, at 11:33, Anders Lassen wrote:

I have tried this but gave up, because I did not now of surrogate  
pairs.


But I will try again.

Anders Lassen

On Sep 25, 2009, at 8:27 PM, Douglas Davidson wrote:



On Sep 25, 2009, at 11:18 AM, Anders Lassen wrote:

But still, I can not see, how this solve my problem getting  
characters outside the unicode 16 bits range into a NSString.


NSString is conceptually UTF-16, which means that characters  
outside the BMP are represented using surrogate pairs.  However,  
for purposes of getting them into an NSString, you can (for  
example) represent them in UTF-32 and use one of the conversion  
methods.  Alternatively, you could put them in a file, maybe a  
text file or a plist, and let the standard import methods deal  
with encoding issues.


Douglas Davidson



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Re: Suggestions for debugging “EXC_BAD_ ACCESS”

Run with NSZombieEnabled=YES, or just use the Zombies Instruments
template (ships with Xcode 3.2).

--Kyle Sluder
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Re: Correct way to tell if a path is to a .bundle?



On Sep 25, 2009, at 12:12 PM, Rick Mann wrote:


   keyLSTypeIsPackage/key
   false/


Shouldn't that be true, not false?

—Jens___

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Re: Correct way to tell if a path is to a .bundle?



On Sep 25, 2009, at 8:52 AM, Sean McBride wrote:


So while you should absolutely do as Jens says,
you should additionally set the bundle bit for packages you create.   
See

'man SetFile'.  SetFile -a B /path/to/package.


Sounds like good advice, but SetFile is a command-line tool, not an  
API. The actual API to set HFS flags is, I think, somewhere in  
CarbonCore/Files.h.


—Jens___

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Re: Parsing error in NSEvent?

2009-09-25 Thread Nick Zitzmann



On Sep 25, 2009, at 1:00 PM, slasktrattena...@gmail.com wrote:


#if MAC_OS_X_VERSION_MAX_ALLOWED = MAC_OS_X_VERSION_10_6
   NSTouchEventSubtype = NX_SUBTYPE_MOUSE_TOUCH // FAILS  
HERE

#endif
};
#endif

What's up with this and is there a way to fix it?


NX_SUBTYPE_MOUSE_TOUCH should be defined in the IOLLEvent.h header in  
the IOKit framework in the Snow Leopard SDK. You might want to make  
sure that the correct header is being imported by using the preprocess  
feature. You are using the 10.6 SDK as the base SDK for that  
architecture, right?


Nick Zitzmann
http://www.chronosnet.com/

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Re: Suggestions for debugging “EXC_BAD _ACCESS”

2009-09-25 Thread Nick Zitzmann



On Sep 25, 2009, at 1:14 PM, Bob Barnes wrote:

If I'm reading this correctly, not a given by any means, Core  
Foundation is trying to get the retain count for an object, possibly  
a CALayer, where the reference pointer is no longer valid, but how  
do I determine what object?


Use Instruments, use the object alloc instrument with retain/release  
counting and NSZombie detection turned on, and run your app. When it  
crashes, you should be told what caused the crash, and you should get  
a complete log of the retains/releases on the object.


Nick Zitzmann
http://www.chronosnet.com/

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Re: Suggestions for debugging “EXC_BAD _ACCESS”

2009-09-25 Thread Greg Parker


On Sep 25, 2009, at 12:14 PM, Bob Barnes wrote:
 If I'm reading this correctly, not a given by any means, Core  
Foundation is trying to get the retain count for an object, possibly  
a CALayer, where the reference pointer is no longer valid, but how  
do I determine what object? I've tried running with the performance  
tools, which tells me where objects are allocated, but I haven't  
found anything that will help identify THE object that's causing the  
problem. I've tried Shark, but it just seems to hang with  
Sampling Any and all suggestions welcome.


Try NSZombies first. Guard Malloc catches some errors that NSZombie  
does not. You can also dig around in the CPU register data:

http://sealiesoftware.com/blog/archive/2008/09/22/objc_explain_So_you_crashed_in_objc_msgSend.html


--
Greg Parker gpar...@apple.com Runtime Wrangler


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Re: Parsing error in NSEvent?

2009-09-25 Thread slasktrattena...@gmail.com

On Fri, Sep 25, 2009 at 9:25 PM, Nick Zitzmann n...@chronosnet.com wrote:

 On Sep 25, 2009, at 1:00 PM, slasktrattena...@gmail.com wrote:

 #if MAC_OS_X_VERSION_MAX_ALLOWED = MAC_OS_X_VERSION_10_6
   NSTouchEventSubtype             = NX_SUBTYPE_MOUSE_TOUCH // FAILS HERE
 #endif
 };
 #endif

 What's up with this and is there a way to fix it?

 NX_SUBTYPE_MOUSE_TOUCH should be defined in the IOLLEvent.h header in the
 IOKit framework in the Snow Leopard SDK. You might want to make sure that
 the correct header is being imported by using the preprocess feature. You
 are using the 10.6 SDK as the base SDK for that architecture, right?

I'm currently on Leopard so I can't say for sure, but now that you
mention it, I believe the base SDK might have been set to 10.5. I'll
have a look as soon as I reboot. Thanks for the hint!
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Re: Correct way to tell if a path is to a .bundle?

2009-09-25 Thread Sean McBride

On 9/25/09 12:24 PM, Jens Alfke said:

 So while you should absolutely do as Jens says,
 you should additionally set the bundle bit for packages you create.
 See
 'man SetFile'.  SetFile -a B /path/to/package.

Sounds like good advice, but SetFile is a command-line tool, not an
API. The actual API to set HFS flags is, I think, somewhere in
CarbonCore/Files.h.

Yes.  You can use the MoreFilesX sample code and do this:

  FSChangeFinderFlags (theFsRef, true, kHasBundle);

--

Sean McBride, B. Eng s...@rogue-research.com
Rogue Researchwww.rogue-research.com
Mac Software Developer  Montréal, Québec, Canada


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Re: Disappearing NSStatusItem

2009-09-25 Thread BravoBug Software

Make sure you're properly -retain'ing it. Just because you have an
ivar pointing to it doesn't mean it will stick around after
GC/autorelease pool releases stuff. You'll need to explicitly -retain
the NSStatusItem since NSStatusBar does not.


On Fri, Sep 25, 2009 at 11:21 AM, Jacob Schwartz
jakehschwa...@gmail.com wrote:
 Hello again,

 After making headway on my first cocoa app, I have run into an issue. I have
 created a NSStatusItem in my class called Application.m. When I run, the
 icon appears in my menubar but then disappears and becomes ineligable to
 click. I read something somewehere about thr garbage collection taking it
 away but I have it saved as an instance in my class so Im out of ideas. I
 also read about the AppDelegate class that is made for me when I make a new
 project but I don't know how to use that. Fail. Anyway thanks again
 everyone.

 -Jake
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Re: Disappearing NSStatusItem

2009-09-25 Thread Bill Bumgarner



On Sep 25, 2009, at 4:30 PM, BravoBug Software wrote:


Make sure you're properly -retain'ing it. Just because you have an
ivar pointing to it doesn't mean it will stick around after
GC/autorelease pool releases stuff. You'll need to explicitly -retain
the NSStatusItem since NSStatusBar does not.


Yes-- you need to explicitly retain anything you want to keep around  
when running under retain/release.  Or you need a strong reference to  
it (or CFRetain it) if running under GC.


However, the rest of the answer is very confusing.   An objective-c  
program runs either garbage collected or using retain/release.


GC/autorelease doesn't make any sense.

b.bum



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Re: Suggestions for debugging “EXC_BAD _ACCESS” [SOLVED]

2009-09-25 Thread Bob Barnes

Kyle/Nick/Greg,

Thank you guys. Took a little digging but the combination of
NSZombie instruments object allocation did the job. After years
working with Java I find myself tripping over memory management issues
much too often. I had allocated a UIButton using buttonWithType: and
then later released it without ever having retained it. I'm
concluding (perhaps incorrectly) that using buttonWithType: doesn't
grant 'object ownership' in the same way that alloc does.

Bob

On Sep 25, 2009, at 12:36 PM, Greg Parker wrote:

On Sep 25, 2009, at 12:14 PM, Bob Barnes wrote:
If I'm reading this correctly, not a given by any means, Core
Foundation is trying to get the retain count for an object,
possibly a CALayer, where the reference pointer is no longer valid,
but how do I determine what object? I've tried running with the
performance tools, which tells me where objects are allocated, but
I haven't found anything that will help identify THE object that's
causing the problem. I've tried Shark, but it just seems to hang
with Sampling Any and all suggestions welcome.

Try NSZombies first. Guard Malloc catches some errors that NSZombie
does not. You can also dig around in the CPU register data:

http://sealiesoftware.com/blog/archive/2008/09/22/objc_explain_So_you_crashed_in_objc_msgSend.html

--
Greg Parker gpar...@apple.com Runtime Wrangler

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Re: Suggestions for debugging “EXC_BAD_ ACCESS” [SOLVED]

On Fri, Sep 25, 2009 at 4:46 PM, Bob Barnes toadf...@comcast.net wrote:
Thank you guys. Took a little digging but the combination of NSZombie
instruments object allocation did the job. After years working with Java I
find myself tripping over memory management issues much too often. I had
allocated a UIButton using buttonWithType: and then later released it
without ever having retained it. I'm concluding (perhaps incorrectly) that
using buttonWithType: doesn't grant 'object ownership' in the same way that
alloc does.

You are correct. Re-read the Memory Management Guide and commit the
rules to heart:
http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/MemoryMgmt/Articles/mmRules.html#//apple_ref/doc/uid/2994-BAJHFBGH

Specifically, the first rule applies in this case:
You take ownership of an object if you create it using a method whose
name begins with “alloc” or “new” or contains “copy” (for example,
alloc, newObject, or mutableCopy), or if you send it a retain message.
You are responsible for relinquishing ownership of objects you own
using release or autorelease. Any other time you receive an object,
you must not release it.

Since buttonWithType: does not begin with alloc or new, and does
not contain copy, you don't own the object it returns.

--Kyle Sluder
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Re: Suggestions for debugging “EXC_BAD _ACCESS” [SOLVED]

2009-09-25 Thread Graham Cox



On 26/09/2009, at 9:46 AM, Bob Barnes wrote:

 I'm  concluding (perhaps incorrectly) that using buttonWithType:  
doesn't grant 'object ownership' in the same way that alloc does.



I'd say that was true, since 'buttonWithType:' doesn't contain the  
words 'new', 'alloc', 'create', 'retain' or 'copy'.


See here:

file:///Developer/Documentation/DocSets/com.apple.adc.documentation.AppleSnowLeopard.CoreReference.docset/Contents/Resources/Documents/documentation/Cocoa/Conceptual/MemoryMgmt/Articles/mmObjectOwnership.html

--Graham


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Re: Disappearing NSStatusItem

2009-09-25 Thread Jacob Schwartz

Yeah, I threw in a release statement after and it didn't do anything  
different. When I read your reply, I thought what Bill said, that  
garbage collection was different from release/retain statements.


-Jake Schwartz

On Sep 25, 2009, at 7:33 PM, Bill Bumgarner wrote:



On Sep 25, 2009, at 4:30 PM, BravoBug Software wrote:


Make sure you're properly -retain'ing it. Just because you have an
ivar pointing to it doesn't mean it will stick around after
GC/autorelease pool releases stuff. You'll need to explicitly -retain
the NSStatusItem since NSStatusBar does not.


Yes-- you need to explicitly retain anything you want to keep around  
when running under retain/release.  Or you need a strong reference  
to it (or CFRetain it) if running under GC.


However, the rest of the answer is very confusing.   An objective-c  
program runs either garbage collected or using retain/release.


GC/autorelease doesn't make any sense.

b.bum





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Re: Suggestions for debugging “EXC_BAD _ACCESS” [SOLVED]

2009-09-25 Thread Randall Meadows


On Sep 25, 2009, at 5:46 PM, Bob Barnes wrote:


Kyle/Nick/Greg,

   Thank you guys. Took a little digging but the combination of  
NSZombie  instruments object allocation did the job. After years  
working with Java I find myself tripping over memory management  
issues much too often. I had allocated a UIButton using  
buttonWithType: and then later released it without ever having  
retained it. I'm  concluding (perhaps incorrectly) that using  
buttonWithType: doesn't grant 'object ownership' in the same way  
that alloc does.


Right.  Read the memory management guidelines; they outline the  
(simple) rules pretty well. Basically: You own the object if you  
receive it via a call that contains new, alloc, or copy, in  
which case you *must* -release it.  An object received via any other  
call, you do *NOT* own, and must *NOT* -release it unless you first - 
retain it.


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Re: Correct way to tell if a path is to a .bundle?

2009-09-25 Thread Peter Ammon



On Sep 24, 2009, at 8:09 PM, Jens Alfke wrote:



On Sep 24, 2009, at 6:41 PM, Rick Mann wrote:

I'm scanning a directory for plugins for my app. Given a path,  
what's the right way to tell if it's a path to a bundle?


-[NSWorkspace isFilePackageAtPath:].



Actually, bundles are often packages, and vice versa, but you can be  
either without the other.


A file package is a directory that is presented as a single file to  
the user, while a bundle is a directory with a particular layout.  For  
example, frameworks are bundles, but not packages.  If you navigate to  
a .framework file in Finder, you will see that it looks like a  
folder.  Likewise, you can take any directory and set the package bit,  
and it becomes a package.


The usual way is to just try loading the URL as a bundle, and see if  
you succeed.  You could also define a particular extension for your  
plugin type, and look for files of that extension, with the assistance  
of CFBundleCreateBundlesFromDirectory.


-Peter

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Re: [__NSFastEnumerationEnumerator nextObject] unexpectedly not very fast!

2009-09-25 Thread Charles Srstka


On Sep 25, 2009, at 12:38 PM, Ben Trumbull wrote:


In summary, the existence of fast enumeration does nothing for
existing enumeration technologies and if you have to support
10.4 (as I do) you simply can't use it unless you fork your code.

My solution, in the few cases where performance is paramount,
has been to essentially roll my own fast enumeration. For very
large arrays (thousands of objects) I'll get blocks of objects
in batching using [NSArray getObjects:range:], process those in
a tight C loop, and then get another batch.


The for (in) construct is by far the most optimized general purpose  
way to work with any of the collections in Cocoa on 10.5, 10.6, and  
iPhone OS.  It's also polymorphic, so custom collection subclasses  
can fine tune the behavior.


If you have to hand roll your own, either for 10.4, or some  
specialized case, your best bet is to use -getObjects: into a local  
buffer.  gcc supports variable length arrays, and that's the fastest  
way to marshall these batches temporarily.  You'll want to be very  
careful to do length checks to not overrun your stack, and limit the  
size.  If you have somewhere between 256  512 objects, give or  
take, you'll have to malloc a temporary id*  Overflowing the stack  
is not pretty.


What I did was to create a CSForeach set of macros which take a  
variable and a collection name, with #ifdefs set up to cause different  
macros to be used under 32-bit and 64-bit. Under 64-bit, it's pretty  
safe to assume the user is running Leopard or better, so the macro  
evaluates to for(var in collection), but in 32-bit, it makes an  
enumerator and generates a while loop. This way, most people running  
Leopard on relatively recent hardware will get the faster enumeration,  
and those running 10.4 will at least have it still work.


I also made a conditional version of the macro, which lets me specify  
a condition to check each time the loop comes around. In 32-bit, it  
changes the while loop to while((foo = [enumerator nextObject])   
bar), whereas in 64-bit it adds a if(!bar) break; at the beginning of  
the loop.


Charles
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Re: Correct way to tell if a path is to a .bundle?



On Sep 25, 2009, at 17:15:45, Peter Ammon wrote:



On Sep 24, 2009, at 8:09 PM, Jens Alfke wrote:



On Sep 24, 2009, at 6:41 PM, Rick Mann wrote:

I'm scanning a directory for plugins for my app. Given a path,  
what's the right way to tell if it's a path to a bundle?


-[NSWorkspace isFilePackageAtPath:].



Actually, bundles are often packages, and vice versa, but you can be  
either without the other.


A file package is a directory that is presented as a single file to  
the user, while a bundle is a directory with a particular layout.   
For example, frameworks are bundles, but not packages.  If you  
navigate to a .framework file in Finder, you will see that it looks  
like a folder.  Likewise, you can take any directory and set the  
package bit, and it becomes a package.


The usual way is to just try loading the URL as a bundle, and see if  
you succeed.  You could also define a particular extension for your  
plugin type, and look for files of that extension, with the  
assistance of CFBundleCreateBundlesFromDirectory.


Unfortunately, I don't think CFBundleCreateBundlesFromDirectory() will  
work for me. It creates CFBundleRefs, not NSBundles, and it loads  
them, which I want to avoid if possible.


I think I just have to check the filenames' extensions as I iterate  
them.


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Global Hotkeys in 64-bit mode

2009-09-25 Thread Tobias Zimmerman

I sent a longer message yesterday, but it apparently didn¹t get posted.  I
am looking for a way to implement global hotkeys in 64-bit mode.  When I use
the method described here: http://unsanity.org/archives/45.php I am
having a problem with the EventHotKeyRef that is registered not matching the
one that comes through as data1 in the NSEvent.  It appears to be a 32-bit
to 64-bit conversion issue, and my code works fine when compiled in 32-bit
mode.

Has anyone made global hotkeys work in 64-bit mode?

Thanks
Tobias Zimmerman
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How to implement IB-like Inspector Palette?