date:20090918

Hey All, quick question. I think this is straight forward, but just
wanted some verification before I move forward too far.

To keep a long story somewhat short - I have a custom view, which I am
placing a custom control into, and am curious if it's proper to
specifically be calling the drawRect method of a control from my
subclassed NSView.

Here are the classes:

http://pastebin.com/m4fb2d114 (a base view)
http://pastebin.com/m2835d3f6 (subclassed view)
http://pastebin.com/m6ab006a6 (the control)
http://pastebin.com/m4ded8d96 (the cell)

Like I said, I'm not very far, but wanted to verify the explicit call
to the control draw method. Is this the correct way?

Thanks much!
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Running Safari from application

2009-09-18 Thread Bartosz Białecki

Hi,
I try to open local html file in Safari from my application. I use this 
code:
- (void)viewDidLoad
{
[super viewDidLoad];
username = [[NSUserDefaults standardUserDefaults] stringForKey: 
@username];
password = [[NSUserDefaults standardUserDefaults] stringForKey: 
@password];

if ([username length] == 0 || [password length] == 0) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle: alertTitle 
message: alertMessage delegate: self cancelButtonTitle: 
alertCancelButtonTitle otherButtonTitles: nil];
[alert show];
[alert release];
} else {
if ([self saveHtmlFile])
[self showPageInSafari];
}
}

- (void)alertView:(UIAlertView *)alertView 
didDismissWithButtonIndex:(NSInteger)buttonIndex
{
 if (buttonIndex == 0) {
exit(0);
 }
}

- (BOOL) saveHtmlFile
{
NSString *fileContent = [NSString stringWithFormat: 
@htmlheadscript type=\text/javascript\function send_request() { 
var form = document.getElementById(\login\); form.submit(); 
}/script/headbody onload='send_request();'form id='login' 
action='https://www.example.com/index.php' method='post'input 
id='username' name='username' type='hidden' value='%@' /input 
type='hidden' id='password' name='password' value='%@' 
//form/body/html,
 username, password];
NSError *error;
return [fileContent writeToFile: [self getPathToHtmlFile] atomically: 
YES encoding: NSUnicodeStringEncoding error: error];
}

- (void) showPageInSafari
{
[[UIApplication sharedApplication] openURL: [NSURL fileURLWithPath: 
[self getPathToHtmlFile]]];
}

- (NSString *) getPathToHtmlFile
{
NSArray *paths = 
NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 
NSDocumentDirectory, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
return [NSString stringWithFormat: @%@/login.html, documentsDirectory];
}


The problem is that the safari is not launched. If I put in 
showPageInSafari function openURL: [NSURL URLWithString: 
@http://www.example.com/index.php;] then it works. Do you know what is 
wrong?
Thanks
Bartosz Bialecki


Znajdź mieszkanie dla siebie!
Porównaj i kup.
http://klik.wp.pl/?adr=http%3A%2F%2Fcorto.www.wp.pl%2Fas%2Fogloszenia_nier.htmlsid=862


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Re: NSView / NSControl / NSCell drawing question

nvmind. I got it all figured out. Just by adding the control the a
view, it automatically calls the drawing methods. Thanks.

On Thu, Sep 17, 2009 at 11:04 PM, aaron smith
beingthexemplaryli...@gmail.com wrote:
 Hey All, quick question. I think this is straight forward, but just
 wanted some verification before I move forward too far.

 To keep a long story somewhat short - I have a custom view, which I am
 placing a custom control into, and am curious if it's proper to
 specifically be calling the drawRect method of a control from my
 subclassed NSView.

 Here are the classes:

 http://pastebin.com/m4fb2d114 (a base view)
 http://pastebin.com/m2835d3f6 (subclassed view)
 http://pastebin.com/m6ab006a6 (the control)
 http://pastebin.com/m4ded8d96 (the cell)

 Like I said, I'm not very far, but wanted to verify the explicit call
 to the control draw method. Is this the correct way?

 Thanks much!

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Handling mouse events in NSCell's?

What's the proper way of handling simple mouse events in NSCell's?
Like mouseUp, mouseDown, etc.

I see that an NSControl implements NSResponder, but wasn't sure if
that's the right way to do it. Because of the fact that tables usually
use cell's rather than a control. I've also been looking at the method
trackMouse:inRect:ofView:untilMouseUp: but this method doesn't ever
get fired when the mouse is up.

Any ideas?
Thanks.
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Re: Handling mouse events in NSCell's?

2009-09-18 Thread Ken Ferry

Hi Aaron,
You should take a look at the NSCell
docshttp://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/trackMouse:inRect:ofView:untilMouseUp:
.

-Ken
trackMouse:inRect:ofView:untilMouseUp:
Discussion

This method is *generally not overridden* because the default implementation
invokes other NSCell methods that can be overridden to handle specific
events in a dragging session. This method’s return value depends on the *
untilMouseUp* flag. If *untilMouseUp* is set to YES, this method returns YES if
the mouse button goes up while the cursor is anywhere; NO, otherwise. If *
untilMouseUp* is set to NO, this method returns YES if the mouse button goes
up while the cursor is within *cellFrame*; NO, otherwise.

This method first invokes
*startTrackingAt:inView:*http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/startTrackingAt:inView:.
If that method returns YES, then as mouse-dragged events are intercepted, *
continueTracking:at:inView:*http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/continueTracking:at:inView:
is
invoked until either the method returns NO or the mouse is released.
Finally,
*stopTracking:at:inView:mouseIsUp:*http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/stopTracking:at:inView:mouseIsUp:
is
invoked if the mouse is released. If *untilMouseUp* is YES, it’s invoked
when the mouse button goes up while the cursor is anywhere. If *untilMouseUp
* is NO, it’s invoked when the mouse button goes up while the cursor is
within *cellFrame*. You usually override one or more of these methods to
respond to specific mouse events.

On Fri, Sep 18, 2009 at 1:33 AM, aaron smith
beingthexemplaryli...@gmail.com wrote:

What's the proper way of handling simple mouse events in NSCell's?
Like mouseUp, mouseDown, etc.

I see that an NSControl implements NSResponder, but wasn't sure if
that's the right way to do it. Because of the fact that tables usually
use cell's rather than a control. I've also been looking at the method
trackMouse:inRect:ofView:untilMouseUp: but this method doesn't ever
get fired when the mouse is up.

Any ideas?
Thanks.
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Re: NSRunLoop issue

2009-09-18 Thread Andreas Grosam



On Sep 17, 2009, at 7:01 PM, Jean-Daniel Dupas wrote:



Le 17 sept. 2009 à 18:28, Jerry Krinock a écrit :



On 2009 Sep 17, at 07:48, Jean-Daniel Dupas wrote:

Add a dummy source (mach port or timer with an insanely high fire  
date) before running your loop. So you re sure there is at least  
one source.


Please show a few lines of code adding a dummy mach port.  One  
time I tried to do that and kept going around in circles in the  
documentation.




[[NSRunLoop currentRunLoop] addPort:[NSMachPort port]  
forMode:NSDefaultRunLoopMode];



Thank you Jean-Daniel for the tip.

I'm using a dummy timer currently - but the mach port approach looks  
better.







Thanks!

Jerry Krinock



-- Jean-Daniel




Regards
Andreas

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Re: Building a 64-bit Preferences Pane

2009-09-18 Thread Jesse Armand

I just realized that the dev forums for Mac is only available for
Select or Premier member of ADC, not the online member.

Do you mind to share the solution ?

Jesse Armand

(http://jessearmand.com)



2009/4/30 慧 松本 sato...@mac.com:
 Thanks!!

 My problem was resolved at  https://devforums.apple.com/community/mac

 Satoshi


 On 2009/04/30, at 12:59, Clark Cox wrote:

 2009/4/29 慧 松本 sato...@mac.com:

 On 2009/04/30, at 12:05, Andrew Farmer wrote:

 On 29 Apr 09, at 19:48, 慧 松本 wrote:

 Does anybody know how to make 64-bit preference panes?

 You can't, yet. The System Preferences application - which loads
 preference panes as plugins - is still 32-bit only, so it can't load
 64-bit
 prefpane plugins.

 Sorry, I forgot to mention my OS environment. I am developing the
 preference
 pane on Mac OS X 10.6 Snow Leopard build 10A335.
 Does my question violate NDA?

 Take it to https://devforums.apple.com/community/mac

 --
 Clark S. Cox III
 clarkc...@gmail.com

 -
 Satoshi Matsumoto sato...@mac.com
 816-5 Odake, Odawara, Kanagawa, Japan 256-0802




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init for immutable classes

2009-09-18 Thread Jon Hull


Hello,

I am writing a framework which runs on both Snow Leopard and the  
iPhone (i.e. it is entirely foundation stuff).


I always write my init and dealloc methods using the setter functions,  
but I am wondering what the proper convention is for immutable  
classes?  Should I write a private setter method, or is it ok to just  
set the variable in init and release it in -dealloc.  Thus:


Option 1)
-(id)initWithValue:(id)aValue
{
if(self=[super init]){
[self setValue:aValue];
}
return self;
}

-(void)dealloc
{
[self setValue:nil];
[super dealloc];
}

Option 2)
-(id)initWithValue:(id)aValue
{
if(self=[super init]){
_value = [aValue copy];
}
return self;
}

-(void)dealloc
{
[[self value] release];
[super dealloc];
}

Is ether one better for a particular reason, or are they both ok, and  
it is just a matter of style?  I am thinking that the second is  
probably better, because even a 'private' method could get called from  
outside of the class, and I couldn't guarantee it's immutability  
anymore.  That is so different from what I normally do (I was taught  
to always use setter methods) that I wanted to check with the list  
first...


Thanks,
Jon
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Populating TableView Via Button.

2009-09-18 Thread Philip Juel Borges


Hi!

Does anyone know how you'd populate a tableview when clicking a  
button? I tried this:


AppController.h:

- (void)populateTableView:(id)sender;

AppController.m:

-(void)populateTableView:(id)sender {

[super init];
sourceArray =  [NSArray arrayWithObjects:
[NSDictionary 
dictionaryWithObjectsAndKeys:
 @test 1, @title,
 [NSURL fileURLWithPath:@/Library/1.html], 
@url, nil],
[NSDictionary 
dictionaryWithObjectsAndKeys:
 @test 2, @title,
 [NSURL fileURLWithPath:@/Library/2.html], 
@url, nil],
[NSDictionary 
dictionaryWithObjectsAndKeys:
 @test 3, @title,
 [NSURL fileURLWithPath:@/Library/3.html], 
@url, nil],
[NSDictionary 
dictionaryWithObjectsAndKeys:
 @test 4, @title,
 [NSURL fileURLWithPath:@/Library/4.html], 
@url, nil],

nil];

return self;

}

This doesn't work. If I replace the void function in the class .m file  
with (id) init, everything works fine. But then it populates the  
tableview on launch and I'd like to populate the tableView only when I  
click a button.


--Philip
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Re: Populating TableView Via Button.

2009-09-18 Thread I. Savant


On Sep 18, 2009, at 9:34 AM, Philip Juel Borges wrote:

Does anyone know how you'd populate a tableview when clicking a  
button?


  Nope. That kind of high-tech stuff is beyond any Cocoa developer. ;-)



I tried this:

-(void)populateTableView:(id)sender {

[super init];

...

return self;

}

This doesn't work. If I replace the void function in the class .m  
file with (id) init, everything works fine. But then it populates  
the tableview on launch and I'd like to populate the tableView only  
when I click a button.


  In all seriousness, there are a number of things that seem to be  
wrong with your understanding of Objective-C and the Cocoa frameworks.


  So first of all, this code example goes beyond trouble populating  
the table view. It's as much to do with initializing (what I assume  
must be) an instance variable called sourceArray. Since you said  
everything works fine (ie, you see things in your table) when you take  
another approach, I'll assume your table datasource (or bindings)  
setup is configured correctly.


  Second, this very strange call you make to [super init] is  
inexplicable. There's just no good reason to call your class's  
superclass's init or even the class's own init method from some random  
place within your class. Even if you give a good technical reason, I'd  
argue you don't. :-) Read the Allocating and Initializing Objects  
section of the Objective C 2.0 Programming Language guide to get a  
better idea of the hows and whys:


http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocAllocInit.html#//apple_ref/doc/uid/TP30001163-CH22-SW1

  Third, you're returning self within a method that claims to return  
nothing at all (void). I assume this and the call to [super init] are  
a result of your trying to get things working (and moving them to a  
method that you can call yourself, directly). Unfortunately both these  
issues will only confuse things further. Move initialization stuff  
back to your init method and diagnose the real problem.


  Fourth - the real problem: You never ask the table to -reloadData  
(if you're using the NSTableDataSource protocol) or you never tell the  
NSArrayController where to get its information. So it comes down to  
that ... are you using the data source protocol or bindings?


  If you're using the data source protocol, all you need to do is  
tell the table view to -reloadData when you've changed its data. If  
you're using Bindings, it's a bit more complicated: you need to change  
your sourceArray in a KVO-compliant way so the array controller to  
which your table is bound hears about the change. Search the  
archives for phrases like, changing the array behind the controller's  
back and read:


http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/KeyValueObserving/

  (Better yet, create KVC/KVO-compliant accessors for your  
sourceArray and use those to set a new array. Using Objective-C 2.0  
properties makes this *very* easy.)


--
I.S.


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Re: +keyPathsForValuesAffectingKey not working for a category-implemented property on a CoreData class

2009-09-18 Thread Doug Knowles

Thanks for the help; all better now. Comments inline.

On Thu, Sep 17, 2009 at 12:42 PM, Quincey Morris 
quinceymor...@earthlink.net wrote:

 On Sep 17, 2009, at 05:44, Doug Knowles wrote:

  In a CoreData entity called Topic, I have a to-many relationship (to
 other
 Topics) called children to implement a hierarchy. In a category on
 Topic,
 I have implemented a property called orderedChildren which returns a
 sorted array of the children. In order to ensure that orderedChildren is
 recognized as a property of the Topic entity, I have defined
 orderedChildren as an optional, transient attribute of Topic of unknown
 type (since NSArray or id isn't supported). CoreData generates a property
 declaration for orderedChildren with type UNKNOWN_TYPE, and I have
 #defined UNKNOWN_TYPE as id in my precompiled header.


 It's not at all obvious that following this strategy (creating the
 transient attribute) does you any good whatsoever. OTOH, it's not at all
 obvious that it does any harm WRT to the problem you're having.


I did this in a misguided attempt to eliminate a unimplemented method
warning, which was properly fixed by including the category's header.



  What doesn't work is defining a class method
 +keyPathsForValuesAffectingOrderedChildren,
 which I'd like to use to cause changes in the children relationship to
 trigger change notifications for orderedChildren.
 keyPathsForValuesAffectingOrderedChildren is never called. (Overriding
 keyPathsForValuesAffectingValueForKey: from a category is verboten.)


 Prima facie, the reason 'keyPathsForValuesAffectingOrderedChildren' doesn't
 get called would be that nothing is observing the property. Maybe that
 aspect deserves attention ahead of the Core Data side of it. Have you tried
 writing some debugging code that (a) installs a KVO observer on the
 orderedChildren property of a Topic object, and (b) changes the children
 property, to see whether (c) observeValueForKeyPath:... is invoked for key
 orderedChildren?


Sigh, And thereby hangs the problem: the observer I thought I added was
missing. Adding the observer back yields the expected results,
and keyPathsForValuesAffectingOrderedChildren is being called.



 Narrowing the problem definition might be the most useful thing you could
 do.

 Also, sorry if it's a stupid question, but you have checked the console log
 for exception messages, haven't you? It often happens, with KVO-related
 problems, that an application can appear to run *almost* correctly after an
 exception is logged and ignored.


There are no stupid questions, especially from people like yourself willing
to lend some assistance here. In this case, I have a permanent (if
sometimes disabled) on objc_exception_throw that I use to help make sure I
don't miss exceptions.

Many thanks again.
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Re: Populating TableView Via Button.

2009-09-18 Thread Sean Kline

Would an alternative implementation be to have the button click swap in a
view with a NSTableView bound to its data source?
-S

On Fri, Sep 18, 2009 at 9:34 AM, Philip Juel Borges philipjbor...@gmail.com
 wrote:

 Hi!

 Does anyone know how you'd populate a tableview when clicking a button? I
 tried this:

 AppController.h:

 - (void)populateTableView:(id)sender;

 AppController.m:

 -(void)populateTableView:(id)sender {

[super init];
sourceArray =  [NSArray arrayWithObjects:
[NSDictionary
 dictionaryWithObjectsAndKeys:
 @test 1, @title,
 [NSURL 
 fileURLWithPath:@/Library/1.html],
 @url, nil],
[NSDictionary
 dictionaryWithObjectsAndKeys:
 @test 2, @title,
 [NSURL 
 fileURLWithPath:@/Library/2.html],
 @url, nil],
[NSDictionary
 dictionaryWithObjectsAndKeys:
 @test 3, @title,
 [NSURL 
 fileURLWithPath:@/Library/3.html],
 @url, nil],
[NSDictionary
 dictionaryWithObjectsAndKeys:
 @test 4, @title,
 [NSURL 
 fileURLWithPath:@/Library/4.html],
 @url, nil],

nil];

return self;

 }

 This doesn't work. If I replace the void function in the class .m file with
 (id) init, everything works fine. But then it populates the tableview on
 launch and I'd like to populate the tableView only when I click a button.

 --Philip
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If someone could inspect this code and explain to me what am I doing wrong ?

2009-09-18 Thread Mario Kušnjer


Hello to the list !

As the title say, I could use home help.
I'm still on the learning path.

This code is attempt of implementing a Leopard style source list using  
a NSOutlineView.
Code provided below works but as seen from the console output of  
NSLog's it displays come cell's number of times which probably means
that my implementation of some methods is fault in some part. Also  
execution is noticeable slow.


I would be grateful if someone could inspect this code and explain to  
me where are my mistakes and point out possible solutions which

would improve this code.

It would be very useful for my better understanding and future learning.

Also to mention that I have read Apple's documentation regarding the  
subject and have downloaded and examine a lot of examples of
source list implementations but those examples were just too  
complicated to understand how to implement data source methods, and  
documentation

on the other hand is too general.

If someone wants to test this code in the Xcode just a remainder to  
connect IBOutlet, data source and delegate connections in Interface  
Builder.


And at the end there is a delegate method implementation but I comment  
it out because it is also fault. It makes things even worse.

Please review it too and explain to me what did I missed out.

Thanks for help !



#import Cocoa/Cocoa.h


@interface LSOutlineDataSource : NSObject
{
IBOutlet NSOutlineView *lsOutlineView;

NSMutableArray *sourceListLevelZero;
}

@property (assign) NSMutableArray *sourceListLevelZero;

@end

---

#import LSOutlineDataSource.h


@implementation LSOutlineDataSource

@synthesize sourceListLevelZero;

- (id)init
{
if (self = [super init])
{
sourceListLevelZero = [[NSMutableArray alloc] init];

		NSMutableDictionary *showOne = [[NSMutableDictionary alloc]  
initWithObjectsAndKeys:@NEWS AT 6, @nameOfShow, [[NSMutableArray  
alloc] initWithObjects:@MONDAY, @TUESDAY, @WEDNESDAY,  
@THURSDAY, @FRIDAY, @SATURDAY, @SUNDAY, nil],  
@listOfShowsRundownLists, nil];

[sourceListLevelZero addObject:showOne];
[showOne release];

		NSMutableDictionary *showTwo = [[NSMutableDictionary alloc]  
initWithObjectsAndKeys:@NEWS AT 10, @nameOfShow, [[NSMutableArray  
alloc] initWithObjects:@MONDAY, @TUESDAY, @WEDNESDAY,  
@THURSDAY, @FRIDAY, @SATURDAY, @SUNDAY, nil],  
@listOfShowsRundownLists, nil];

[sourceListLevelZero addObject:showTwo];
[showTwo release];
}
return self;
}

- (void)awakeFromNib
{
[lsOutlineView expandItem:nil expandChildren:NO];
}

- (void)dealloc
{
[sourceListLevelZero release];
[super dealloc];
}

#pragma mark NSOutlineViewDataSource protocol methods

- (NSInteger)outlineView:(NSOutlineView *)outlineView  
numberOfChildrenOfItem:(id)item

{
if (item == nil)
{
item = sourceListLevelZero;

NSLog(@1 - item number of children is %i, [item count]);
return [item count];
}
if ([item isKindOfClass:[NSDictionary class]])
{
		NSLog(@1.1 - item number of children is %i, [[item  
objectForKey:@listOfShowsRundownLists] count]);

return [[item objectForKey:@listOfShowsRundownLists] count];
}
NSLog(@1.2 - item number of children is 0);
return 0;
}

- (id)outlineView:(NSOutlineView *)outlineView child:(NSInteger)index  
ofItem:(id)item

{
if (item == nil)
{
item = sourceListLevelZero;

		NSLog(@2 - item at index %i is %@, index, [item  
objectAtIndex:index]);

return [item objectAtIndex:index];
}
if ([item isKindOfClass:[NSDictionary class]])
{
		NSLog(@2.1 - item for key \listOfShowsRundownLists\ at index %i  
is %@, index, [[item objectForKey:@listOfShowsRundownLists]  
objectAtIndex:index]);
		return [[item objectForKey:@listOfShowsRundownLists]  
objectAtIndex:index];

}
NSLog(@2.2 - item is not valid);
return nil;
}

- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable: 
(id)item

{
	if ([item isKindOfClass:[NSArray class]] || [item isKindOfClass: 
[NSDictionary class]])

{
if ([item count]  0)
{
NSLog(@3 - item is expandable);
return YES;
}
}
NSLog(@3.1 - item is not expandable);
return NO;
}

- (id)outlineView:(NSOutlineView *)outlineView  
objectValueForTableColumn:(NSTableColumn *)tableColumn byItem:(id)item

{
if ([item

Re: init for immutable classes

2009-09-18 Thread Kyle Sluder


On Sep 18, 2009, at 4:10 AM, Jon Hull jh...@gbis.com wrote:

I always write my init and dealloc methods using the setter  
functions, but I am wondering what the proper convention is for  
immutable classes?  Should I write a private setter method, or is it  
ok to just set the variable in init and release it in -dealloc.  Thus:


Never use accessors in -init or -dealloc.

--Kyle Sluder
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Re: Running Safari from application


On 18.09.2009, at 10:26, Bartosz Białecki wrote:

The problem is that the safari is not launched. If I put in
showPageInSafari function openURL: [NSURL URLWithString:
@http://www.example.com/index.php;] then it works. Do you know what  
is

wrong?


Could it be that the path is not accessible for Safari? Remember,  
iPhone apps are sandboxed to prevent them from messing with each  
other's files.


Cheers,
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Re: init for immutable classes


On 18.09.2009, at 13:10, Jon Hull wrote:
I am writing a framework which runs on both Snow Leopard and the  
iPhone (i.e. it is entirely foundation stuff).


I always write my init and dealloc methods using the setter  
functions, but I am wondering what the proper convention is for  
immutable classes?  Should I write a private setter method, or is it  
ok to just set the variable in init and release it in -dealloc.  Thus:


(...) Is ether one better for a particular reason, or are they both  
ok, and it is just a matter of style?  I am thinking that the second  
is probably better, because even a 'private' method could get called  
from outside of the class, and I couldn't guarantee it's  
immutability anymore.  That is so different from what I normally do  
(I was taught to always use setter methods) that I wanted to check  
with the list first...


See here for a rationale on why it could be a bad idea to use  
accessors in init methods (and maybe even destructors):


http://zathras.de/blog-defensive-coding-in-objective-c.htm

And since immutable objects are not intended to be mutated at all,  
there should be only two places where ivars are changed: init and  
dealloc, so I don't think there's any need for mutators (accessors,  
for reading, are likely needed anyway).


Cheers,
-- Uli Kusterer
The witnesses of TeachText are everywhere...



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CalCalendarStore Breaking a Recurring Event

2009-09-18 Thread Brad Goss


Hello everyone,

I've encountered a bug/limitation with the CalCalendarStore.

The situation in a nutshell:
1) Add an event with a recurrenceRule repeating everyday for 2 days.
2) Delete the first event (could be either)
3) Now try to undo the users action by inserting the event back in.

CalCalendarStore will not insert the record back in.

When a user breaks a recurring event in iCal by deleting an event,  
iCal sends a CalUpdatedRecordsKey notification. (No  
CalDeletedRecordsKey is posted.)
When the user undos the action, iCal then posts CalUpdatedRecordsKey  
again. (No CalInsertedRecordsKey is posted.)

When I examine the events, the properties all remain unchanged...

My issue is in my App I break the recurrenceRule by deleting and event  
using CalCalendarStore removeEvent: span: error:.


This works exactly the way I would like, however when the user undos  
their action CalCalendarStore saveEvent: span: error: is used but the  
event is not re-inserted. I do not know what property to modify so it  
will take it back.


If I knew what property to update instead of deleting the event i'd do  
that, but I can't find it!


Any ideas how I should handle the situation?

Snow Leopard 10.6.1

Brad Goss
brad.g...@gmail.com
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Reliable way to find out if CoreData finished loading

2009-09-18 Thread Mantas Masalskis


Hi,

I'm loading Core Data object via Managed Object Context in IB. It  
looks like it hasn't finished loading when applicationDidFinishLoading  
is fired.


What is the appropriate way to do smth once Managed Object Context is  
loaded?


Mantas Masalskis

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2 simple questions

2009-09-18 Thread Kennedy Kok

1. How do I programmatically open a folder window? And open a webpage  
using the default browser?


2. How do I change the icon for a folder I have created  
programmatically? How do I get it to list it under Places (on the  
left of the Finder window) programmatically?


Thanks
K 
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Re: Building a 64-bit Preferences Pane

2009-09-18 Thread Jesse Armand

Okay thanks, I also found the solution from a blog somewhere while searching.

It's weird how Apple lay out all of the important things about 64-bit
in the docs, but left out this one somewhere that I couldn't find
easily.

I also ran the script to check for 64-bit compatibility, added the
proper #ifdef for it (it's only about data types).

2009/9/18 MATSUMOTO Satoshi sato...@mac.com:
 Hi,


 Building 64-bit Preferences Pane...
 In response to satoshi on Apr 30, 2009 2:21 PM
 I have been trying to make a simple 64-bit Preference Pane on Snow Leopard
 buid 10A335. But all trials ended in failure.

 For example:
        1) Make a new preference pane project SamplePrefPane with Xcode.
        2) Set the build option ARCHS to x86_64
        3) Build it and double click SamplePrefPane.prefPane

  ANSWER

 2.5)   turn on Garbage Collection.  (Search for garbage collection in
 build settings inspector)
 On Snow Leopard, System Preferences has garbage collection enabled when
 launched as a 64 bit application (default on 64 bit capable machines).
 If you intend on supporting both 32 bit and 64 bit machines, you'll need to
 build your preference pane as a dual mode module;  gc supported instead of
 gc only.
 Then System Preferences app says:
        Preferences Error
         You can't open SimplePrefPane preferences because
         it doesn't work on an Intel-based Mac.
 That is a horribly failure message.  Please file a bug via
 http://bugreporter.apple.com/.

 Satoshi



 Jesse Armand
 
 (http://jessearmand.com)



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Re: 2 simple questions

Hi Kennedy,

let me introduce you to a brand-new tool called Google. You can
find it at http://www.google.com and you type in your questions, and
generally the first to third items in the replies it gives you tell
you exactly how to solve your problem. For those questions where I
easily found the answer by googling, I'll just paste the Google URL
with the question I typed in here.

On 18.09.2009, at 17:44, Kennedy Kok wrote:

1. How do I programmatically open a folder window?

http://www.google.com/search?client=safarirls=enq=cocoa+open+finder+windowie=UTF-8oe=UTF-8

And open a webpage using the default browser?

http://www.google.com/search?client=safarirls=enq=cocoa+open+web+pageie=UTF-8oe=UTF-8

2. How do I change the icon for a folder I have created
programmatically?

http://www.google.com/search?client=safarirls=enq=cocoa+custom+icon+for+folderie=UTF-8oe=UTF-8

How do I get it to list it under Places (on the left of the Finder
window) programmatically?

That last one doesn't really have an official solution. I suggest you
look into using AppleScript to do that, and if that fails, you could
use a program like FSEventer to find out which file Finder writes this
info to (it's probably a plist and it probably writes a file path or
Alias data (NSURL bookmark data) to that plist).

Cheers,
-- Uli Kusterer
The witnesses of TeachText are everywhere...

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Re: Reliable way to find out if CoreData finished loading

2009-09-18 Thread Sean Kline

Hi Mantas,
What are you trying to do?

- S

On Thu, Sep 17, 2009 at 6:46 PM, Mantas Masalskis man...@idev.lt wrote:

 Hi,

 I'm loading Core Data object via Managed Object Context in IB. It looks
 like it hasn't finished loading when applicationDidFinishLoading is fired.

 What is the appropriate way to do smth once Managed Object Context is
 loaded?

 Mantas Masalskis

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Re: Reliable way to find out if CoreData finished loading

2009-09-18 Thread I. Savant


On Sep 17, 2009, at 6:46 PM, Mantas Masalskis wrote:

I'm loading Core Data object via Managed Object Context in IB. It  
looks like it hasn't finished loading when  
applicationDidFinishLoading is fired.



  Perhaps thinking about this a different way would clarify things.  
You don't load a context. You create a context and use it to fetch  
objects from the store (or merely to create objects if you're using an  
in-memory store).


  So, if you have some controllers that aren't ready yet, you can  
simply instruct them to -fetch: ... this will force them to fetch  
immediately, rather than waiting for a future cycle of the run loop.


What is the appropriate way to do smth once Managed Object Context  
is loaded?


  What's a smth?

--
I.S.


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Re: Building a 64-bit Preferences Pane

2009-09-18 Thread Kyle Sluder


On Sep 18, 2009, at 9:01 AM, Jesse Armand mnemonic...@gmail.com wrote:


It's weird how Apple lay out all of the important things about 64-bit
in the docs, but left out this one somewhere that I couldn't find
easily.


Garbage collection and 64-bit are orthogonal issues. A process can be  
one, both, or neither. If you're building a bundle to be loaded by  
another app, use otool on the app to figure out what kind of bundle  
you need to be.


--Kyle Sluder
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Re: Handling mouse events in NSCell's?

2009-09-18 Thread Raleigh Ledet

I agree with Ken and strongly encourage you to use the three tracking
methods already defined in the NSCell documentation

raleigh.

On Sep 18, 2009, at 2:12 AM, Ken Ferry wrote:

-Ken
trackMouse:inRect:ofView:untilMouseUp:
Discussion

This method is *generally not overridden* because the default
implementation

invokes other NSCell methods that can be overridden to handle specific
events in a dragging session. This method’s return value depends on
the *
untilMouseUp* flag. If *untilMouseUp* is set to YES, this method
returns YES if
the mouse button goes up while the cursor is anywhere; NO,
otherwise. If *
untilMouseUp* is set to NO, this method returns YES if the mouse
button goes

up while the cursor is within *cellFrame*; NO, otherwise.

is
invoked until either the method returns NO or the mouse is released.
Finally, *stopTracking:at:inView:mouseIsUp:*http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/stopTracking:at:inView:mouseIsUp:

is
invoked if the mouse is released. If *untilMouseUp* is YES, it’s
invoked
when the mouse button goes up while the cursor is anywhere. If
*untilMouseUp
* is NO, it’s invoked when the mouse button goes up while the cursor
is
within *cellFrame*. You usually override one or more of these
methods to

respond to specific mouse events.

On Fri, Sep 18, 2009 at 1:33 AM, aaron smith
beingthexemplaryli...@gmail.com wrote:

What's the proper way of handling simple mouse events in NSCell's?
Like mouseUp, mouseDown, etc.

trackMouse:inRect:ofView:untilMouseUp: but this method doesn't ever
get fired when the mouse is up.

Any ideas?
Thanks.
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Re: Printing with Snow Leopard

2009-09-18 Thread Raleigh Ledet


Hi Gerriet,

You are printing the same instance of a view that is in your UI. So  
basically, your are trying to get the same view to print on two  
threads. Unless your view can handle concurrent drawing, this could be  
bad. NSTextView doesn't support concurrent drawing. I think you were  
getting lucky on Leopard.


Possible solutions:
1. Don't print concurrently.
2. Create another view and set it up with the content from your UI.  
Use this view for printing on a background thread.


-raleigh

On Sep 12, 2009, at 6:18 AM, Gerriet M. Denkmann wrote:



On 11 Sep 2009, at 21:28, Corbin Dunn wrote:


Hi Gerriet,
Have you tried running with Zombies?

Yes.


Run - Run With Performance Tool - Zombies

If so, does that show an overrelease anywhere?

No.


Can you please log a bug on bugreporter.apple.com if you believe it  
is a bug in the Apple framework. Please include an isolated test  
case, if possible (that will greatly speed up investigation into  
the issue, especially if it is a recent regression).

Bug ID# 7218833.


thanks,

corbin

On Sep 10, 2009, at 10:54 PM, Gerriet M. Denkmann wrote:

An app which ran without problems on Leopard likes to crash on  
Snow Leopard (10.6.1) (both in i386 and x86_64).


How to crash: print several times; might crash the first time,  
might crash the seventh time, but crash it will.


The backtrace and the location of the crash varies wildly. In  
almost always it is some NSFont method.
The backtrace below is an exception. But still related to layout  
stuff.


I have a very strong feeling, that something (my code? Apple's  
printing code?) corrupts some memory which then results in random  
errors.
Or maybe not: just ran it a dozen times with GuardMalloc and it  
refused to crash. And GuardMalloc did not report any problems.

So maybe it is some timing problem with multiple threads?
I tried it more than a dozen times with:  
setCanSpawnSeparateThread: NO and it did not crash.


Are there any known problems with printing using  
setCanSpawnSeparateThread: YES?




== the code 

- (IBAction)printIt: sender ;
{
(void)sender;

... get path from NSSavePanel 
NSLog(@%s got path \%...@\,__FUNCTION__, path);

NSPrintInfo *printInfo = [ self printInfo ];

[ printInfo setJobDisposition: NSPrintSaveJob ];
NSMutableDictionary *dictionary = [ printInfo dictionary ];
[ dictionary setObject: path  forKey: NSPrintSavePath ];
	[ dictionary setObject: [ NSNumber numberWithBool: YES ] forKey:  
NSPrintAllPages ];

NSLog(@%s dictionary %@,__FUNCTION__, dictionary);

	NSPrintOperation *po = [ NSPrintOperation printOperationWithView:  
textView  printInfo: printInfo ];

[ po setShowsPrintPanel: NO ];
[ po setCanSpawnSeparateThread: YES ];

NSLog(@%s NSPrintOperation %@,__FUNCTION__, po);
	NSLog(@%s will runOperationModalForWindow for %@,__FUNCTION__,  
[ textView window ]);

[ porunOperationModalForWindow: [ textView window ]
delegate:   self
			didRunSelector: 			@selector 
( printOperationDidRun:success:contextInfo: )

contextInfo:NULL
];

NSLog(@%s printing \%...@\,__FUNCTION__, path);
}


- (void)printOperationDidRun:(NSPrintOperation *)printOperation   
success:(BOOL)ok  contextInfo:(void *)contextInfo

{
if ( !ok )  //  error
{
		NSLog(@%s Error in:  
runOperationModalForWindow:delegate:didRunSelector:contextInfo 
:,__FUNCTION__);

return;
};

NSPrintInfo *printInfo = [ printOperation printInfo ];
NSMutableDictionary *dictionary = [ printInfo dictionary ];
NSString *path = [ dictionary objectForKey: NSPrintSavePath ];

NSLog(@%s printed \%...@\,__FUNCTION__, path);
NSLog(@%s printInfo %@,__FUNCTION__, printInfo);

return; 
}

== the output 

-[GymDocument printIt:] got path /private/var/folders/+s/ 
+sLxz7jCEUSrZ3BtxGVGUU+++TM/-Tmp-/Reading 1...4.pdf

-[GymDocument printIt:] dictionary {
NSBottomMargin = 41;
NSCopies = 1;
NSDetailedErrorReporting = 0;
NSFaxNumber = ;
NSFirstPage = 1;
NSHorizonalPagination = 2;
NSHorizontallyCentered = 1;
NSJobDisposition = NSPrintSaveJob;
NSJobSavingFileNameExtensionHidden = 0;
NSJobSavingURL = file://localhost/var/folders/+s/+sLxz7jCEUSrZ3BtxGVGUU+++TM/-Tmp-/Reading%201...4.pdf 
;

NSLastPage = 2147483647;
NSLeftMargin = 18;
NSMustCollate = 1;
NSOrientation = 0;
NSPagesAcross = 1;
NSPagesDown = 1;
NSPaperName = iso-a4;
NSPaperSize = NSSize: {595, 842};
NSPrintAllPages = 1;
NSPrintProtected = 0;
NSPrintTime = 0001-01-01 06:42:04 +064204;
NSPrinter = {\n\Device Description\ = {\n 
NSDeviceIsPrinter = YES;\n};\n\Language Level\ = 2;\n 
Name = \ \;\nType = \\;\n};

NSPrinterName =  ;
NSRightMargin = 18;
NSSavePath =

Re: If someone could inspect this code and explain to me what am I doing wrong ?

2009-09-18 Thread Quincey Morris


On Sep 18, 2009, at 07:52, Mario Kušnjer wrote:

This code is attempt of implementing a Leopard style source list  
using a NSOutlineView.
Code provided below works but as seen from the console output of  
NSLog's it displays come cell's number of times which probably means
that my implementation of some methods is fault in some part. Also  
execution is noticeable slow.


It's not clear what you think is wrong.

Data source methods may be called (in general) any number of times at  
any time. If you think the NSLog output shows something wrong, post an  
example here.


There's really nothing in your data source code that should be making  
things slow. If that's an ongoing problem, you should try to narrow  
down what part of the code is slow. (Performance tools like  
Instruments may help, but I suspect your application is in too early a  
phase of development for them to help much. It's probably easier just  
to try commenting out sections of code to see if things speed up.)



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Re: Populating TableView Via Button.

2009-09-18 Thread Volker in Lists


Hi,

best solution would be to update the datasource...

Swapping views just for the sake of displaying new data is not  
something one should do. Have you read up on how to implement a  
datasource for NSTableView?


Maybe you try to follow this old, but still useful tutorial: 
http://www.cocoadev.com/index.pl?NSTableViewTutorial

Volker


Am 18.09.2009 um 16:44 schrieb Sean Kline:

Would an alternative implementation be to have the button click swap  
in a

view with a NSTableView bound to its data source?


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What is the life of the c string returned by NSString's UTF8String method?

2009-09-18 Thread Stuart Malin

I am under the impression that the reference returned by NSString's  
UTF8String method is valid for the life of the NSString instance which  
provided the reference (and further, that the memory of the referenced  
C string is freed when the NSString is released). Is this correct?


I have a class with some (statically allocated) class variables. In  
the class's -initialize method, I create a retained NSString. I set  
one of the class variables to the value returned by -UTF8String (as  
sent to that retained NSString).  I use this char* value in some C  
calls made from instance methods of the class.


The first time an object of the class is instantiated, this works  
fine. But it seems that for subsequent instances, although the value  
of the char* pointer remains unchanged, the memory it is pointing to  
is changed (i.e., no longer a C string representation of the  
NSString).  So, either the NSString has done something with the memory  
pointed to by the initialized reference (i.e., I can't hold onto the  
reference as I have been), or somehow the memory is getting corrupt in  
some other way. I will look into the latter but only if my assumption  
about the former is correct.


TIA.


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Re: Menu shortcuts without modifiers?


On 17.09.2009, at 22:26, Ashley Clark wrote:
Have you tried looking at the  
menuHasKeyEquivalent:forEvent:target:action: delegate method on  
NSMenu?


I suppose you could examine the firstResponder status and other  
state and return NO if you don't want the key to be handled as a key  
equivalent.



Ashley,

 Thanks for the suggestion, hadn't seen that one, but sadly that  
doesn't work It appears that when I return NO, the OS will scan the  
actual menu items and trigger them nonetheless. :-(


Cheers,
-- Uli Kusterer
The witnesses of TeachText are everywhere...



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Re: Running Safari from application


On 18.09.2009, at 18:52, Bartosz Białecki wrote:
I think so too. So do you know maybe another solution how to open  
local

html file with Safari?



 No. But you could always use a web view instead? Or maybe there's  
some sort of shared folder somewhere?


Cheers,
-- Uli Kusterer
The witnesses of TeachText are everywhere...



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Re: What is the life of the c string returned by NSString's UTF8String method?

2009-09-18 Thread Jesper Storm Bache

On Sep 18, 2009, at 11:04 AM, Stuart Malin wrote:
 I am under the impression that the reference returned by NSString's
 UTF8String method is valid for the life of the NSString instance which
 provided the reference (and further, that the memory of the referenced
 C string is freed when the NSString is released). Is this correct?

If I read the documentation, I get a different impression:
===
The returned C string is automatically freed just as a returned object  
would be released; you should copy the C string if it needs to store  
it outside of the autorelease context in which the C string is created
===
To me that indicates that the returned string may be autoreleased  
before the NSString is released.

Jesper



 I have a class with some (statically allocated) class variables. In
 the class's -initialize method, I create a retained NSString. I set
 one of the class variables to the value returned by -UTF8String (as
 sent to that retained NSString).  I use this char* value in some C
 calls made from instance methods of the class.

 The first time an object of the class is instantiated, this works
 fine. But it seems that for subsequent instances, although the value
 of the char* pointer remains unchanged, the memory it is pointing to
 is changed (i.e., no longer a C string representation of the
 NSString).  So, either the NSString has done something with the memory
 pointed to by the initialized reference (i.e., I can't hold onto the
 reference as I have been), or somehow the memory is getting corrupt in
 some other way. I will look into the latter but only if my assumption
 about the former is correct.

 TIA.


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Re: What is the life of the c string returned by NSString's UTF8String method?

2009-09-18 Thread Sean McBride

On 9/18/09 2:04 PM, Stuart Malin said:

I have a class with some (statically allocated) class variables. In
the class's -initialize method, I create a retained NSString. I set
one of the class variables to the value returned by -UTF8String (as
sent to that retained NSString).  I use this char* value in some C
calls made from instance methods of the class.

It would be much safer to just call -UTF8String as needed.  Or have you
found that it is a bottleneck in your code?

--

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


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Re: What is the life of the c string returned by NSString's UTF8String method?



On Sep 18, 2009, at 11:04 AM, Stuart Malin wrote:

I am under the impression that the reference returned by NSString's  
UTF8String method is valid for the life of the NSString instance  
which provided the reference (and further, that the memory of the  
referenced C string is freed when the NSString is released). Is this  
correct?


No. The pointer returned is, effectively, autoreleased, and shouldn't  
be used after the current autorelease pool exits. (I know, it's not an  
object, but it's actually the -bytes of an autoreleased NSData created  
by the NSString.)


NSString doesn't generally store its contents in UTF-8, so any time  
you ask for UTF-8 data it has to allocate space for it.


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Re: Running Safari from application



On 18.09.2009, at 18:52, Bartosz Białecki wrote:
I think so too. So do you know maybe another solution how to open  
local

html file with Safari?


You could encode the entire HTML file in a 'data:' URL, if it's not  
too huge. (You'd have to do the same thing to any custom image:  
convert it to a data: URL and use that as the src= attribute.)


Usually people just embed their own UIWebView if they want to display  
custom local HTML content.


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Re: Finding user's Music folder (and others)?



On Sep 17, 2009, at 9:32 PM, Graham Cox wrote:

It's also pretty common to relocate it - don't assume it's unusual.  
Quite a few people like to keep their music on an external drive so  
whatever it is you're doing, if you assume ~/Music/, it'll fail in  
those cases, as you realise.


Yes! I've sent bug reports to so many developers of iTunes utilities  
that hardcode this :P


Probably better to work out how to obtain iTunes setting - maybe by  
peeking at its prefs.


Just use NSUserDefaults:

$ defaults read com.apple.iApps
{
iTunesRecentDatabasePaths = (
/Users/Shared/snej/Music/iTunes/iTunes Music Library.xml
);
iTunesRecentDatabases = (
file://localhost/Users/Shared/snej/Music/iTunes/iTunes%20Music%20Library.xml 


);
}

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Re: What is the life of the c string returned by NSString's UTF8String method?

2009-09-18 Thread Stuart Malin



On Sep 18, 2009, at 2:20 PM, Sean McBride wrote:


On 9/18/09 2:04 PM, Stuart Malin said:


I have a class with some (statically allocated) class variables. In
the class's -initialize method, I create a retained NSString. I set
one of the class variables to the value returned by -UTF8String (as
sent to that retained NSString).  I use this char* value in some C
calls made from instance methods of the class.


It would be much safer to just call -UTF8String as needed.  Or have  
you

found that it is a bottleneck in your code?



Not a bottleneck, merely another case of misguided attempt to  
optimize.

Gotta learn not to do that unless the need is proven.

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Re: What is the life of the c string returned by NSString's UTF8String method?

2009-09-18 Thread Nick Zitzmann



On Sep 18, 2009, at 12:04 PM, Stuart Malin wrote:

I am under the impression that the reference returned by NSString's  
UTF8String method is valid for the life of the NSString instance  
which provided the reference (and further, that the memory of the  
referenced C string is freed when the NSString is released). Is this  
correct?


The only way to be sure is to run Instruments with the object  
allocations tool and look for allocations equal to the size of the  
string. But I'm pretty sure that draining the autorelease pool frees  
the C strings, or at least, they do get cleaned up at some point.


In any case, if you want them to stick around, then you need to memcpy 
() them into a data buffer that is controlled by your application.


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

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Re: Handling mouse events in NSCell's?

Ken, Yeah I read the docs. I can't figure out how to get the
-stopTracking:at:inView:mouseIsUp: method to fire.

Should I just be able to define that method and receive use that
method when the mouse is up?  Or do I have to use a combination of the
mouse tracking methods available. I've tried both and can't figure out
why that method does not fire.

These are just some random tests to see the order of how I should call
the methods. But I can't figure out why that stop method won't fire.
Any help would  be much appreciated.

- (BOOL)startTrackingAt:(NSPoint)startPoint inView:(NSView *)controlView {
printf(START TRACKING\n);
return NO;
}

- (BOOL)trackMouse:(NSEvent *)theEvent inRect:(NSRect)cellFrame
ofView:(NSView *)controlView untilMouseUp:(BOOL)untilMouseUp {
printf(TRACK);
if([self 
startTrackingAt:NSMakePoint(cellFrame.origin.x,cellFrame.origin.y)
inView:controlView]) {
  //call the continue tracking method here
  return YES;
}
return YES;
}

- (BOOL)continueTracking:(NSPoint)lastPoint at:(NSPoint)currentPoint
inView:(NSView *)controlView {
printf(CONTINUE\n);
return YES;
}

- (void)stopTracking:(NSPoint)lastPoint at:(NSPoint)stopPoint
inView:(NSView *)controlView mouseIsUp:(BOOL)flag {
printf(STOP TRACKING);
}




On Fri, Sep 18, 2009 at 10:11 AM, Raleigh Ledet le...@apple.com wrote:
 I  agree with Ken and strongly encourage you to use the three tracking
 methods already defined in the NSCell documentation

 raleigh.

 On Sep 18, 2009, at 2:12 AM, Ken Ferry wrote:

 Hi Aaron,
 You should take a look at the NSCell

 docshttp://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/trackMouse:inRect:ofView:untilMouseUp:
 .

 -Ken
 trackMouse:inRect:ofView:untilMouseUp:
 Discussion

 This method is *generally not overridden* because the default
 implementation
 invokes other NSCell methods that can be overridden to handle specific
 events in a dragging session. This method’s return value depends on the *
 untilMouseUp* flag. If *untilMouseUp* is set to YES, this method returns
 YES if
 the mouse button goes up while the cursor is anywhere; NO, otherwise. If *
 untilMouseUp* is set to NO, this method returns YES if the mouse button
 goes
 up while the cursor is within *cellFrame*; NO, otherwise.

 This method first invokes

 *startTrackingAt:inView:*http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/startTrackingAt:inView:.
 If that method returns YES, then as mouse-dragged events are intercepted,
 *

 continueTracking:at:inView:*http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/continueTracking:at:inView:
 is
 invoked until either the method returns NO or the mouse is released.
 Finally,
 *stopTracking:at:inView:mouseIsUp:*http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSCell_Class/Reference/NSCell.html#//apple_ref/occ/instm/NSCell/stopTracking:at:inView:mouseIsUp:
 is
 invoked if the mouse is released. If *untilMouseUp* is YES, it’s invoked
 when the mouse button goes up while the cursor is anywhere. If
 *untilMouseUp
 * is NO, it’s invoked when the mouse button goes up while the cursor is
 within *cellFrame*. You usually override one or more of these methods to
 respond to specific mouse events.


 On Fri, Sep 18, 2009 at 1:33 AM, aaron smith 
 beingthexemplaryli...@gmail.com wrote:

 What's the proper way of handling simple mouse events in NSCell's?
 Like mouseUp, mouseDown, etc.

 I see that an NSControl implements NSResponder, but wasn't sure if
 that's the right way to do it. Because of the fact that tables usually
 use cell's rather than a control. I've also been looking at the method
 trackMouse:inRect:ofView:untilMouseUp: but this method doesn't ever
 get fired when the mouse is up.

 Any ideas?
 Thanks.
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Re: Crash on SL in com.apple.DesktopServices after using NSOpenPanel

2009-09-18 Thread Lucien W. Dupont

On Tue, Sep 8, 2009 at 7:53 AM, Corbin Dunn corb...@apple.com wrote:

 On Sep 7, 2009, at 5:25 AM, Markus Spoettl wrote:

 On Sep 7, 2009, at 1:31 PM, Thomas Clement wrote:

 Looks like an Apple bug.
 http://kb2.adobe.com/cps/506/cpsid_50654.html


 That doesn't seem to be the problem with that user's machine as the files 
 are local.

 It is more than likely that it is the same problem.

 Please report bugs like this using bugreporter.apple.com -- especially when 
 you believe the problem may be in a system framework.

I've also seen this crash - I believe it has something to do with
having file sharing on. I've reported it as Radar 7222081

  Lucien
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Re: What is the life of the c string returned by NSString's UTF8String method?

2009-09-18 Thread Jean-Daniel Dupas



Le 18 sept. 2009 à 20:20, Nick Zitzmann a écrit :



On Sep 18, 2009, at 12:04 PM, Stuart Malin wrote:

I am under the impression that the reference returned by NSString's  
UTF8String method is valid for the life of the NSString instance  
which provided the reference (and further, that the memory of the  
referenced C string is freed when the NSString is released). Is  
this correct?


The only way to be sure is to run Instruments with the object  
allocations tool and look for allocations equal to the size of the  
string. But I'm pretty sure that draining the autorelease pool frees  
the C strings, or at least, they do get cleaned up at some point.


In any case, if you want them to stick around, then you need to  
memcpy() them into a data buffer that is controlled by your  
application.




Or to avoid a copy and raw memory management, you can also query  
directly an NSData from the string using -[NSString  
dataUsingEncoding:NSUTF8StringEncoding] and then use -[NSData bytes]  
as the returned value for this method is guarantee to have the same  
life as the NSData object.


-- Jean-Daniel




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getting accessor method info in a different class.

2009-09-18 Thread jon

In one class,  I have set webView up like this...  which works fine,   
but i want to have access to this pointer from another class...
i am not getting something correct here,  it gives me warning:   
WebView may not respond to webView

i'll just include the relevant code.

what am i not understanding about accessor methods?
what is the proper way to have access to the pointer of the webView  
but in a different class..


 the webviewcontroller class works as it should, (the .m file has the  
@synthesize in it)  but the bookmarkcontroller class returns the  
warning above. (some extra stuff is added like @class to see if it  
would help)

Jon.

header of class webviewcontroller:
-
#import Cocoa/Cocoa.h
#import WebKit/WebKit.h

@interface webViewController : NSDocument
{
IBOutlet WebView *webView;
}

@property(readwrite,retain) WebView *webView;

@end
-

header of class BookMarkController:
-
#import Cocoa/Cocoa.h
#import WebKit/WebKit.h
#import webViewController.h

@class WebView;

@interface BookMarkController : NSWindowController
{
WebView *theWebView;
}

@end
-

implementation of class BookMarkController:
-
#import BookMarkController.h

@implementation BookMarkController

- (void)setup
{
[theWebView webView];  // here i get the warning;
}

@end
-

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Re: What is the life of the c string returned by NSString's UTF8String method?

2009-09-18 Thread Wade Tregaskis

Or to avoid a copy and raw memory management, you can also query  
directly an NSData from the string using -[NSString  
dataUsingEncoding:NSUTF8StringEncoding] and then use -[NSData bytes]  
as the returned value for this method is guarantee to have the same  
life as the NSData object.


Though of course you must then beware the GC.

Wade
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Problem with fontDescriptorWithFontAttributes:

2009-09-18 Thread Laurent Daudelin


Not sure if it's a known issue but given this:

currentFontDescriptor = [NSFontDescriptor  
fontDescriptorWithFontAttributes:fontAttributes];
NSFont *fontToUse = [NSFont fontWithDescriptor:currentFontDescriptor  
size:[[self font] pointSize]];


I'm getting this in the debugger:
(gdb) po currentFontDescriptor
NSCTFontDescriptor 0x2b0fe0 = {
NSFontColorAttribute = NSCalibratedWhiteColorSpace 0 1;
NSFontNameAttribute = LucidaGrande;
NSFontSizeAttribute = 11;
}
(gdb) po [fontToUse fontDescriptor]
NSCTFontDescriptor 0x269460 = {
NSFontNameAttribute = LucidaGrande;
NSFontSizeAttribute = 11;
}

As a result, I can't set the font color. What am I doing wrong? This  
is with 10.5 as base SDK.


Anybody has any idea?

-Laurent.
--
Laurent Daudelin
AIM/iChat/Skype:LaurentDaudelin 
http://nemesys.dyndns.org
Logiciels Nemesys Software  
laurent.daude...@verizon.net
Photo Gallery Store: http://laurentdaudelin.shutterbugstorefront.com/g/galleries

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Re: Menu shortcuts without modifiers?

2009-09-18 Thread Peter Ammon



On Sep 17, 2009, at 12:29 PM, Uli Kusterer wrote:


Hi,

I have an app that contains a QTMovieView. I've set things up so  
people can use the arrow keys to skip, fast forward, rewind, use  
space to play/pause etc., as they're used to from other movie- 
playing apps. Now, I'd like to add menu items that correspond to  
these actions for people who don't know the shortcuts. I'd also like  
to show the shortcuts in the menu items, so people know the  
shortcuts are there.


Trouble is: If I set e.g. the space key as a menu item's shortcut  
and a text field has keyboard focus, the space key goes to the menu,  
not to the text field.


I don't want to disable the menu item, as even if there's a text  
field with keyboard focus, the user may want to use the menu to  
pause etc. Is there a way to make any control get the shortcut  
*before* the menus? Is there a way to disable only the shortcut, but  
still have it displayed? Is there a way to fake the shortcut, so I  
can do the actual handling at a different level? (Carbon lets you  
set the menu shortcut glyph separately from the actual shortcut, for  
example).


Anyone have an idea for a solution?

Cheers,
-- Uli Kusterer
The Witnesses of TeachText are everywhere...
http://www.zathras.de



Hi Uli,

For key events without modifiers, like hitting the spacebar, the first  
responder of the key window should get first crack via keyDown:.  So  
I'm not sure why you're seeing the behavior you describe.  I wrote a  
quick test with a focused text field in the key window and a main menu  
item with Space as its key equivalent, and the text field won for  
spacebar.


Can you post the backtrace of the call to the action method of your  
menu item?  It's possible it's being invoked from some place other  
than -[NSApplication handleKeyEquivalent:].

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access to object from a different class

2009-09-18 Thread jon

Ok,  I did not get the desired result, but i am a little closer,  I'm  
going to set this up again.
below is example code to set up the circumstance,  so you better see  
what i want to do. (stripped down to what i am trying to find out)   
(webView is hooked up in IB to a WebView object)


 (i want to replace the  with something that would work where  
theWebView is pointing to the same thing as webView from the first  
class a pointer to the current WebView object)


In first class,  I have set webView up like this...  which works  
fine,  but i want to have access to this current webView object from a  
different class


how does one go about getting at the instance webView coding wize???

Jon.

header of class WebViewController:
-
#import Cocoa/Cocoa.h
#import WebKit/WebKit.h

@interface WebViewController : NSDocument
{
IBOutlet WebView *webView;
}

@property(readwrite,retain) WebView *webView;

@end
-

implementation of class WebViewController:
-
#import WebViewController.h

@implementation WebViewController

@synthesize webView;

@end
-

header of class BookMarkController:
-
#import Cocoa/Cocoa.h
#import WebKit/WebKit.h
#import WebViewController.h

@class WebView;

@interface BookMarkController : NSWindowController
{
WebViewController *aController;
WebView *theWebView;
}

@end
-

implementation of class BookMarkController:
-
#import BookMarkController.h

@implementation BookMarkController

- (void)setup
{
	theWebView = ?  (i want to point to the same thing as webView's  
pointer to it's instance)  or basically  theWebView = webView;

}

@end
-
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Re: getting accessor method info in a different class.

2009-09-18 Thread Greg Guerin


jon wrote:

In one class, I have set webView up like this... which works fine,  
but i want to have access to this pointer from another class...
i am not getting something correct here, it gives me warning:  
WebView may not respond to webView

i'll just include the relevant code.

what am i not understanding about accessor methods?
what is the proper way to have access to the pointer of the webView  
but in a different class..


It has nothing to do with accessor methods, except in the most  
general sense.  You haven't imported the header WebView.h in the .m  
implementation where you're invoking the -webView method.


All you've done is @class WebView, which does nothing more than tell  
the compiler that the name belongs to a class.  The compiler doesn't  
know any methods defined by that class until you import the actual  
WebView.h header.


  -- GG

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iPhone Segmentation Fault

2009-09-18 Thread Bob Barnes


all,

   My iPhone app is reporting a segmentation fault when terminating 
(only on the real device, not in the simulator) and also reporting a 
bad file descriptor. Anyone have any idea what the message is trying to 
tell me or how to find out. It occurs after the call to dealloc has 
completed.


thanks,

Bob 


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Re: access to object from a different class

2009-09-18 Thread jon


Added info:

i would try this:   theWebView = [aController webView];except that  
the aController is new, and not pointing to the thing i want,  the  
first webView's pointer to it's object instance...


Jon.
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Re: Crash on SL in com.apple.DesktopServices after using NSOpenPanel

2009-09-18 Thread Markus Spoettl


On Sep 18, 2009, at 10:30 PM, Lucien W. Dupont wrote:

On Tue, Sep 8, 2009 at 7:53 AM, Corbin Dunn corb...@apple.com wrote:


On Sep 7, 2009, at 5:25 AM, Markus Spoettl wrote:


On Sep 7, 2009, at 1:31 PM, Thomas Clement wrote:


Looks like an Apple bug.
http://kb2.adobe.com/cps/506/cpsid_50654.html



That doesn't seem to be the problem with that user's machine as  
the files are local.


It is more than likely that it is the same problem.

Please report bugs like this using bugreporter.apple.com --  
especially when you believe the problem may be in a system framework.


I've also seen this crash - I believe it has something to do with
having file sharing on. I've reported it as Radar 7222081



For what it's worth, the user who reported the crash - which he could  
reproduce 100% of the time - says that 10.6.1 fixed the issue.


Regards
Markus
--
__
Markus Spoettl



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Description: S/MIME cryptographic signature
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Re: iPhone Segmentation Fault

2009-09-18 Thread Bob Barnes


Bill,

   No crash log, just some console messages.

Fri Sep 18 15:17:42 unknown com.apple.launchd[1] Notice:  
(UIKitApplication:com..[0x2e72]) Bug:  
launchd_core_logic.c:2649 (23909):10
Fri Sep 18 15:17:42 unknown com.apple.launchd[1] Notice:  
(UIKitApplication:com..[0x2e72]) Working around  
5020256. Assuming the job crashed.
Fri Sep 18 15:17:42 unknown com.apple.launchd[1] Warning:  
(UIKitApplication:com..[0x2e72]) Job appears to have  
crashed: Segmentation fault
Fri Sep 18 15:17:42 unknown com.apple.debugserver-43[265] Warning: 1  
[0109/1603]: error: ::read ( 7, 0x28091c, 1024 ) = -1 err = Bad file  
descriptor (0x0009)
Fri Sep 18 15:17:42 unknown SpringBoard[24] Warning: Application  
'Y' exited abnormally with signal 11: Segmentation fault


Bob


On Sep 18, 2009, at 3:00 PM, Bill Bumgarner wrote:


Got a crash log?

On Sep 18, 2009, at 2:57 PM, Bob Barnes wrote:


all,

 My iPhone app is reporting a segmentation fault when terminating  
(only on the real device, not in the simulator) and also reporting  
a bad file descriptor. Anyone have any idea what the message is  
trying to tell me or how to find out. It occurs after the call to  
dealloc has completed.


thanks,

Bob
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Re: If someone could inspect this code and explain to me what am I doing wrong ?

2009-09-18 Thread Mario Kušnjer


On 2009.09.18, at 19:54, Quincey Morris wrote:


It's not clear what you think is wrong.

Data source methods may be called (in general) any number of times  
at any time. If you think the NSLog output shows something wrong,  
post an example here.



Hi again !
I am posting NSLog output and I add some of my questions and comments.
I expanded items by clicking the disclosure triangle:
-
[Session started at 2009-09-18 22:20:58 +0200.]
2009-09-18 22:20:59.030 LSOutline[244:10b] 1 - item number of children  
is 2

2009-09-18 22:20:59.156 LSOutline[244:10b] 2 - item at index 0 is {
   listOfShowsRundownLists = (
   MONDAY,
   TUESDAY,
   WEDNESDAY,
   THURSDAY,
   FRIDAY,
   SATURDAY,
   SUNDAY
   );
   nameOfShow = NEWS AT 6;
}
2009-09-18 22:20:59.160 LSOutline[244:10b] 3 - item is expandable
2009-09-18 22:20:59.162 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	This is where the value of the first  
item is called

2009-09-18 22:20:59.169 LSOutline[244:10b] 2 - item at index 1 is {
   listOfShowsRundownLists = (
   MONDAY,
   TUESDAY,
   WEDNESDAY,
   THURSDAY,
   FRIDAY,
   SATURDAY,
   SUNDAY
   );
   nameOfShow = NEWS AT 10;
}
2009-09-18 22:20:59.172 LSOutline[244:10b] 3 - item is expandable
2009-09-18 22:20:59.174 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 10	---	and here of the second item.
2009-09-18 22:20:59.380 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	So why is it called again here for the  
first item,
2009-09-18 22:20:59.384 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 10	---	and here for second ?
2009-09-18 22:21:02.768 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	Now I hovered mouse pointer over the  
disclosure triangle and click it and this gets called first time.
2009-09-18 22:21:02.867 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	And this gets called second time.
2009-09-18 22:21:02.934 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	And this gets called third time.
2009-09-18 22:21:03.001 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	And this gets called fourth time.
2009-09-18 22:21:03.067 LSOutline[244:10b] 1.1 - item number of  
children is 7
2009-09-18 22:21:03.070 LSOutline[244:10b] 2.1 - item for key  
listOfShowsRundownLists at index 0 is MONDAY

2009-09-18 22:21:03.088 LSOutline[244:10b] 3.1 - item is not expandable
2009-09-18 22:21:03.094 LSOutline[244:10b] 2.1 - item for key  
listOfShowsRundownLists at index 1 is TUESDAY

2009-09-18 22:21:03.097 LSOutline[244:10b] 3.1 - item is not expandable
2009-09-18 22:21:03.103 LSOutline[244:10b] 2.1 - item for key  
listOfShowsRundownLists at index 2 is WEDNESDAY

2009-09-18 22:21:03.122 LSOutline[244:10b] 3.1 - item is not expandable
2009-09-18 22:21:03.125 LSOutline[244:10b] 2.1 - item for key  
listOfShowsRundownLists at index 3 is THURSDAY

2009-09-18 22:21:03.127 LSOutline[244:10b] 3.1 - item is not expandable
2009-09-18 22:21:03.130 LSOutline[244:10b] 2.1 - item for key  
listOfShowsRundownLists at index 4 is FRIDAY

2009-09-18 22:21:03.136 LSOutline[244:10b] 3.1 - item is not expandable
2009-09-18 22:21:03.155 LSOutline[244:10b] 2.1 - item for key  
listOfShowsRundownLists at index 5 is SATURDAY

2009-09-18 22:21:03.158 LSOutline[244:10b] 3.1 - item is not expandable
2009-09-18 22:21:03.161 LSOutline[244:10b] 2.1 - item for key  
listOfShowsRundownLists at index 6 is SUNDAY

2009-09-18 22:21:03.163 LSOutline[244:10b] 3.1 - item is not expandable
2009-09-18 22:21:03.174 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	Probable after going through the array  
of children, parent has to be called again

2009-09-18 22:21:03.191 LSOutline[244:10b] 4.1 - item is MONDAY
2009-09-18 22:21:03.217 LSOutline[244:10b] 4.1 - item is TUESDAY
2009-09-18 22:21:03.221 LSOutline[244:10b] 4.1 - item is WEDNESDAY
2009-09-18 22:21:03.227 LSOutline[244:10b] 4.1 - item is THURSDAY
2009-09-18 22:21:03.229 LSOutline[244:10b] 4.1 - item is FRIDAY
2009-09-18 22:21:03.234 LSOutline[244:10b] 4.1 - item is SATURDAY
2009-09-18 22:21:03.236 LSOutline[244:10b] 4.1 - item is SUNDAY
2009-09-18 22:21:03.251 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 10	---	Probable after going through the array  
of children, parent has to be called again
2009-09-18 22:21:27.193 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 10	---	Now I hovered mouse pointer over the  
disclosure triangle and this gets called first time.
2009-09-18 22:21:27.261 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 10	---	And this gets called second time.
2009-09-18 22:21:27.328 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 10	---	And this gets called third time.
2009-09-18 22:21:27.396 LSOutline[244:10b] 4 - item for key

transition through black

2009-09-18 Thread Erik Colson


hello,

I want to create a CATransition for transition as follows :

first, fade to black
second fade to new image

How should I do this ?
--
erik
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Re: transition through black

2009-09-18 Thread Erik Colson



On 19 Sep 2009, at 01:15, Christopher Kemsley wrote:


CAKeyframeAnimation

Have three keyframes:
1) original image
2) black image (from CGBitmapContext and CGFillRect... etc)
3) new image


hmmm... that might be a solution...
however I was thinking about using CIFilter with CATransition for  
this. any idea ?


thanx
--
erik
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Re: If someone could inspect this code and explain to me what am I doing wrong ?

2009-09-18 Thread Charles Srstka


On Sep 18, 2009, at 5:26 PM, Mario Kušnjer wrote:

This is slow while expanding and collapsing. Maybe because it is  
writing to the NSLog ?


Well, did you try commenting out the logs and see if that reduces the  
slowness?


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Static Analyzer and Core Foundation

2009-09-18 Thread Steve Cronin


Folks;

Alert - potential boneheaded-ness lies ahead - please be gentle.

I'll be the first to admit that I'm much happier in ObjC than C…

I thought I would try static analysis and see what turned up.
On the whole I must say I'm pleased but this one has me questioning my  
basic understanding


if (![[NSFileManager defaultManager] fileExistsAtPath:thisPath]) {
…
41  } else {
42  MDItemRef mdi = MDItemCreate( nil, (CFStringRef)thisPath );
43  if  ( mdi != nil )  {
44			CFDictionaryRef dictRef = MDItemCopyAttributes( mdi,  
MDItemCopyAttributeNames(mdi));

…
CFRelease(dictRef);
} else {
… handle error
}
}

Static Analysis tells me I have a potential leak of object allocated  
on line 44 -- that's all.


My questions are:
1) Why is there not a warning for the object allocated on line 42 -  
mdi ?

2) Why is the CFRelease(dictRef) not sufficient?

Thank you for you patience!
Steve___

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Re: Static Analyzer and Core Foundation

2009-09-18 Thread Luke the Hiesterman

Line 44 creates 2 objects, one goes into the dictRef, the other is not  
assigned to a variable, but is used only as the second argument to  
MDItemCopyAttributes. The object that you create inside that call is  
never released.


Luke

On Sep 18, 2009, at 4:33 PM, Steve Cronin wrote:


Folks;

Alert - potential boneheaded-ness lies ahead - please be gentle.

I'll be the first to admit that I'm much happier in ObjC than C…

I thought I would try static analysis and see what turned up.
On the whole I must say I'm pleased but this one has me questioning  
my basic understanding


if (![[NSFileManager defaultManager] fileExistsAtPath:thisPath]) {
…
41  } else {
42  MDItemRef mdi = MDItemCreate( nil, (CFStringRef)thisPath );
43  if  ( mdi != nil )  {
44			CFDictionaryRef dictRef = MDItemCopyAttributes( mdi,  
MDItemCopyAttributeNames(mdi));

…
CFRelease(dictRef);
} else {
… handle error
}
}

Static Analysis tells me I have a potential leak of object allocated  
on line 44 -- that's all.


My questions are:
1) Why is there not a warning for the object allocated on line 42 -  
mdi ?

2) Why is the CFRelease(dictRef) not sufficient?

Thank you for you patience!
Steve___

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Re: Static Analyzer and Core Foundation

2009-09-18 Thread Steve Cronin


Luke;

OK thank-you for that answer to question 2!
Any thoughts on question 1?

Steve

On Sep 18, 2009, at 6:36 PM, Luke the Hiesterman wrote:

Line 44 creates 2 objects, one goes into the dictRef, the other is  
not assigned to a variable, but is used only as the second argument  
to MDItemCopyAttributes. The object that you create inside that call  
is never released.


Luke

On Sep 18, 2009, at 4:33 PM, Steve Cronin wrote:


Folks;

Alert - potential boneheaded-ness lies ahead - please be gentle.

I'll be the first to admit that I'm much happier in ObjC than C…

I thought I would try static analysis and see what turned up.
On the whole I must say I'm pleased but this one has me questioning  
my basic understanding


if (![[NSFileManager defaultManager] fileExistsAtPath:thisPath]) {
…
41  } else {
42  MDItemRef mdi = MDItemCreate( nil, (CFStringRef)thisPath );
43  if  ( mdi != nil )  {
44			CFDictionaryRef dictRef = MDItemCopyAttributes( mdi,  
MDItemCopyAttributeNames(mdi));

…
CFRelease(dictRef);
} else {
… handle error
}
}

Static Analysis tells me I have a potential leak of object  
allocated on line 44 -- that's all.


My questions are:
1) Why is there not a warning for the object allocated on line 42 -  
mdi ?

2) Why is the CFRelease(dictRef) not sufficient?

Thank you for you patience!
Steve___

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Re: Static Analyzer and Core Foundation

2009-09-18 Thread Chris Parker



On 18 Sep 2009, at 4:33 PM, Steve Cronin wrote:


Alert - potential boneheaded-ness lies ahead - please be gentle.

I'll be the first to admit that I'm much happier in ObjC than C…

I thought I would try static analysis and see what turned up.
On the whole I must say I'm pleased but this one has me questioning  
my basic understanding


if (![[NSFileManager defaultManager] fileExistsAtPath:thisPath]) {
…
41  } else {
42  MDItemRef mdi = MDItemCreate( nil, (CFStringRef)thisPath );
43  if  ( mdi != nil )  {
44			CFDictionaryRef dictRef = MDItemCopyAttributes( mdi,  
MDItemCopyAttributeNames(mdi));

…
CFRelease(dictRef);
} else {
… handle error
}
}

Static Analysis tells me I have a potential leak of object allocated  
on line 44 -- that's all.


My questions are:
1) Why is there not a warning for the object allocated on line 42 -  
mdi ?


Seems like it should be; you're not releasing it and it's going out of  
scope.



2) Why is the CFRelease(dictRef) not sufficient?


In this case, it's probably complaining about the  
MDItemCopyAttributeNames() call, which (because it has Copy in the  
name) returns an object you'd have to release.


I.e., line 44 allocates two objects, the dictionary which you *are*  
releasing and the attribute names array, which you're not.


.chris

--
Chris Parker
Apple Inc.

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Re: Static Analyzer and Core Foundation

2009-09-18 Thread Luke the Hiesterman


There's not enough code here to give a good answer to question 1.

Luke

On Sep 18, 2009, at 4:39 PM, Steve Cronin wrote:


Luke;

OK thank-you for that answer to question 2!
Any thoughts on question 1?

Steve

On Sep 18, 2009, at 6:36 PM, Luke the Hiesterman wrote:

Line 44 creates 2 objects, one goes into the dictRef, the other is  
not assigned to a variable, but is used only as the second argument  
to MDItemCopyAttributes. The object that you create inside that  
call is never released.


Luke

On Sep 18, 2009, at 4:33 PM, Steve Cronin wrote:


Folks;

Alert - potential boneheaded-ness lies ahead - please be gentle.

I'll be the first to admit that I'm much happier in ObjC than C…

I thought I would try static analysis and see what turned up.
On the whole I must say I'm pleased but this one has me  
questioning my basic understanding


if (![[NSFileManager defaultManager] fileExistsAtPath:thisPath]) {
…
41  } else {
42  MDItemRef mdi = MDItemCreate( nil, (CFStringRef)thisPath );
43  if  ( mdi != nil )  {
44			CFDictionaryRef dictRef = MDItemCopyAttributes( mdi,  
MDItemCopyAttributeNames(mdi));

…
CFRelease(dictRef);
} else {
… handle error
}
}

Static Analysis tells me I have a potential leak of object  
allocated on line 44 -- that's all.


My questions are:
1) Why is there not a warning for the object allocated on line 42  
- mdi ?

2) Why is the CFRelease(dictRef) not sufficient?

Thank you for you patience!
Steve___

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Re: Static Analyzer and Core Foundation

2009-09-18 Thread Steve Cronin


Luke;

I've adapted the code to accomodate your's and Chris' answer to  
question 2.


Here's the entire method, which now shows not static analyzer issues  
but I still would like to understand why not.


+ (NSDictionary *)metadataForFilePath:(NSString *)thisPath {
NSDictionary *md = [NSDictionary dictionary];
if (![[NSFileManager defaultManager] fileExistsAtPath:thisPath]) {
NSLog(@file does not existl);
} else {
MDItemRef mdi = MDItemCreate( nil, (CFStringRef)thisPath );
if  ( mdi != nil )  {
CFArrayRef arrayRef = MDItemCopyAttributeNames(mdi);
CFDictionaryRef dictRef = MDItemCopyAttributes( mdi, 
arrayRef);
md = [NSDictionary 
dictionaryWithDictionary:(NSDictionary *)dictRef];
CFRelease(dictRef);
CFRelease(arrayRef);
} else {
NSLog(@mdi is nil);
}
}
return md;
}

Is this the 'best' this can be?
Thanks for helping me learn,
Steve

On Sep 18, 2009, at 6:44 PM, Luke the Hiesterman wrote:


There's not enough code here to give a good answer to question 1.


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Re: NSString vs. encoding

2009-09-18 Thread Johan Kool



Op 17 sep 2009, om 22:29 heeft Andrew Farmer het volgende geschreven:


On 16 Sep 2009, at 22:55, Johan Kool wrote:
Thanks so much!! That is indeed the case! I now use strunvis and  
it's all done in just 4 lines of code. (Well, except that I should  
still handle a returned error code.)


  int len = [stringA  
lengthOfBytesUsingEncoding:NSUTF8StringEncoding];

  char dst[len];
  strunvis(dst, [stringA UTF8String]);
  return [NSString stringWithUTF8String:dst];


Not to burst your bubble, but that doesn't look quite right. It  
fails in the case where stringA contains no escaped characters  
(including the case where it's empty) -- the terminating null byte  
isn't counted by lengthOfBytesUsingEncoding:, so it ends up writing  
one byte off the end of dst[].



Ok, thanks for pointing that out. I'll just increase len by 1, that  
way it should always fit.


Johan

---
http://www.johankool.nl/

KOOLISTOV - Software for Mac and iPhone
http://www.koolistov.net/




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Re: If someone could inspect this code and explain to me what am I doing wrong ?

2009-09-18 Thread Quincey Morris


On Sep 18, 2009, at 15:26, Mario Kušnjer wrote:

2009-09-18 22:20:59.174 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 10	---	and here of the second item.
2009-09-18 22:20:59.380 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	So why is it called again here for  
the first item,
2009-09-18 22:20:59.384 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 10	---	and here for second ?
2009-09-18 22:21:02.768 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	Now I hovered mouse pointer over the  
disclosure triangle and click it and this gets called first time.
2009-09-18 22:21:02.867 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	And this gets called second time.
2009-09-18 22:21:02.934 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	And this gets called third time.
2009-09-18 22:21:03.001 LSOutline[244:10b] 4 - item for key  
nameOfShow is NEWS AT 6	---	And this gets called fourth time.


I see what you mean, but this is *not* obviously wrong. It's possible,  
for example, that this is related to animating the rotation of the  
disclosure triangle when you clicked it (I think it used to rotate in  
3 steps, haven't looked recently).


I think you should expect that the data source method calls *won't* be  
optimal when looked at this way. Those methods are typically supposed  
to be inexpensive, for exactly that reason. Yours looked plenty  
inexpensive enough.



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Re: If someone could inspect this code and explain to me what am I doing wrong ?

2009-09-18 Thread Graham Cox



On 19/09/2009, at 8:26 AM, Mario Kušnjer wrote:


Maybe because it is writing to the NSLog ?



Almost certainly. There's no other obvious bottleneck in your code,  
but logging is quite slow, and if done during any kind of drawing,  
will really be noticeable. A table/outline's data source is called  
frequently while the table is being redrawn.


--Graham


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Printing to NSData

2009-09-18 Thread Gerriet M. Denkmann


I am doing:
NSPrintOperation *po = [ NSPrintOperation printOperationWithView:  
textView  printInfo: printInfo ];

...
PDFDocument *pdfFile = [ [ PDFDocument alloc ] initWithURL: pdfUrl ];
... do some post-processing here

Works fine, but looks rather inefficient, as file-IO is probably the  
slowest thing which can be done.


So I tried:
PDFOperationWithView:insideRect:toData:printInfo: (identical printInfo  
as before)

...
PDFDocument *pdfFile = [ [ PDFDocument alloc ] initWithData: pdfData ];
... do some post-processing here

but the result is just one (very long) page.

Is this a bug or did I miss some magical incantation here?


Kind regards,

Gerriet.

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Re: Printing with Snow Leopard

2009-09-18 Thread Gerriet M. Denkmann



On 19 Sep 2009, at 00:36, Raleigh Ledet wrote:

You are printing the same instance of a view that is in your UI. So  
basically, your are trying to get the same view to print on two  
threads. Unless your view can handle concurrent drawing, this could  
be bad. NSTextView doesn't support concurrent drawing. I think you  
were getting lucky on Leopard.

And lucky on Tiger too.


Possible solutions:
1. Don't print concurrently.
That is my current solution. It blocks the user interface, which is  
bad, but 1000 pages get printed in well under 20 seconds, so it's not  
too bad.


2. Create another view and set it up with the content from your UI.  
Use this view for printing on a background thread.
Thanks for this suggestion. I will try it, when the blocking becomes  
annoying.




-raleigh

On Sep 12, 2009, at 6:18 AM, Gerriet M. Denkmann wrote:



On 11 Sep 2009, at 21:28, Corbin Dunn wrote:


Hi Gerriet,
Have you tried running with Zombies?

Yes.


Run - Run With Performance Tool - Zombies

If so, does that show an overrelease anywhere?

No.


Can you please log a bug on bugreporter.apple.com if you believe  
it is a bug in the Apple framework. Please include an isolated  
test case, if possible (that will greatly speed up investigation  
into the issue, especially if it is a recent regression).

Bug ID# 7218833.


thanks,

corbin

On Sep 10, 2009, at 10:54 PM, Gerriet M. Denkmann wrote:

An app which ran without problems on Leopard likes to crash on  
Snow Leopard (10.6.1) (both in i386 and x86_64).


How to crash: print several times; might crash the first time,  
might crash the seventh time, but crash it will.


The backtrace and the location of the crash varies wildly. In  
almost always it is some NSFont method.
The backtrace below is an exception. But still related to layout  
stuff.


I have a very strong feeling, that something (my code? Apple's  
printing code?) corrupts some memory which then results in random  
errors.
Or maybe not: just ran it a dozen times with GuardMalloc and it  
refused to crash. And GuardMalloc did not report any problems.

So maybe it is some timing problem with multiple threads?
I tried it more than a dozen times with:  
setCanSpawnSeparateThread: NO and it did not crash.


Are there any known problems with printing using  
setCanSpawnSeparateThread: YES?




== the code 

- (IBAction)printIt: sender ;
{
(void)sender;

... get path from NSSavePanel 
NSLog(@%s got path \%...@\,__FUNCTION__, path);

NSPrintInfo *printInfo = [ self printInfo ];

[ printInfo setJobDisposition: NSPrintSaveJob ];
NSMutableDictionary *dictionary = [ printInfo dictionary ];
[ dictionary setObject: path  forKey: NSPrintSavePath ];
	[ dictionary setObject: [ NSNumber numberWithBool: YES ] forKey:  
NSPrintAllPages ];

NSLog(@%s dictionary %@,__FUNCTION__, dictionary);

	NSPrintOperation *po = [ NSPrintOperation  
printOperationWithView: textView  printInfo: printInfo ];

[ po setShowsPrintPanel: NO ];
[ po setCanSpawnSeparateThread: YES ];

NSLog(@%s NSPrintOperation %@,__FUNCTION__, po);
	NSLog(@%s will runOperationModalForWindow for %@,__FUNCTION__,  
[ textView window ]);

[ porunOperationModalForWindow: [ textView window ]
delegate:   self
			didRunSelector: 			@selector 
( printOperationDidRun:success:contextInfo: )

contextInfo:NULL
];

NSLog(@%s printing \%...@\,__FUNCTION__, path);
}


- (void)printOperationDidRun:(NSPrintOperation *)printOperation   
success:(BOOL)ok  contextInfo:(void *)contextInfo

{
if ( !ok )  //  error
{
		NSLog(@%s Error in:  
runOperationModalForWindow:delegate:didRunSelector:contextInfo 
:,__FUNCTION__);

return;
};

NSPrintInfo *printInfo = [ printOperation printInfo ];
NSMutableDictionary *dictionary = [ printInfo dictionary ];
NSString *path = [ dictionary objectForKey: NSPrintSavePath ];

NSLog(@%s printed \%...@\,__FUNCTION__, path);
NSLog(@%s printInfo %@,__FUNCTION__, printInfo);

return; 
}

== the output 

-[GymDocument printIt:] got path /private/var/folders/+s/ 
+sLxz7jCEUSrZ3BtxGVGUU+++TM/-Tmp-/Reading 1...4.pdf

-[GymDocument printIt:] dictionary {
NSBottomMargin = 41;
NSCopies = 1;
NSDetailedErrorReporting = 0;
NSFaxNumber = ;
NSFirstPage = 1;
NSHorizonalPagination = 2;
NSHorizontallyCentered = 1;
NSJobDisposition = NSPrintSaveJob;
NSJobSavingFileNameExtensionHidden = 0;
NSJobSavingURL = file://localhost/var/folders/+s/+sLxz7jCEUSrZ3BtxGVGUU+++TM/-Tmp-/Reading%201...4.pdf 
;

NSLastPage = 2147483647;
NSLeftMargin = 18;
NSMustCollate = 1;
NSOrientation = 0;
NSPagesAcross = 1;
NSPagesDown = 1;
NSPaperName = iso-a4;
NSPaperSize = NSSize: {595, 842};
NSPrintAllPages

How to show the Info Panel for the files in tableview?

2009-09-18 Thread James

Hi all,
   My application is  a movie player that similar to iTunes. Now, the result i 
want are as follows...
If I right-click a movie file in the table view and select the info  menu 
item, I expect it can display
the Info Panel of the file.
Now, the contextual menu is accomplished. But, how can I display the Info 
Panel?
Thanks in advance.
James

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Re: How to show the Info Panel for the files in tableview?

2009-09-18 Thread Graham Cox



On 19/09/2009, at 2:17 PM, James wrote:

Now, the contextual menu is accomplished. But, how can I display the  
Info Panel?





The question is a bit too broad - break it down. This is the same as  
displaying any window/dialog/sheet. Try starting with the  
documentation for NSWindow and NSPanel.


The display of this window has nothing to do with your table and/or  
menu. It can be made to work independently then hooked up to the menu  
command when you're done.


--Graham


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Re: Optimizing Enormous lists in NSBrowser



On Sep 17, 2009, at 2:32 PM, Dave DeLong wrote:

For normal-sized directories, this works pretty well.  However, in  
my worst-case scenario of a flat directory containing 1 million  
files, I've found that it takes 34.8 seconds to retrieve a full  
directory listing (so I know how many to return in  
browser:numberOfRowsInColumn:), 301.5 seconds to filter the array,  
and another 73.6 seconds to sort it.


Have you sampled/profiled it, so you know exactly what operations are  
slow? (My hunch is that, at that scale, high-level Cocoa conveniences  
like predicates and NSFileManager are going to add a lot of overhead.)


If you want have fast operations for huge directories, you'll need to  
use lower-level calls, unfortunately. The most efficient call for your  
purposes is probably getdirentriesattr. There's a good description of  
it, with sample code, in Advanced Mac OS X Programming (Dalrymple   
Hillegass.)


—Jens___

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Re: Static Analyzer and Core Foundation