How To Bind The Enabled Property of NSPopUpButtonCell Menu Items
I've got a two column NSTableView that is bound to an array controller. Each of
the elements in the array looks something like this...
NSMutableDictionary *theDictionary = [NSMutableDictionary
dictionaryWithDictionary: @{@myOptions:theOptionArray,@myTitle: theTitle}];
Column 1 is bound to myTitle and column 2, whcih had an NSPopUpButtonCell in
it, is bound to myOptions. This all works up to this point, the menus populate
for each row in the table view and I can make selections and update things in
my controller. What I need to do is bind the individual enabled state of each
menu item in the myOptions array. Binding the enabled state for the column does
not work as it disables the entire menu. I've tried binding to both
NSPopUpButtonCell and its NSMenuItem but nothing happens (all menu items remain
enabled). Just to test I tried binding these two to arrangedObjects @count of
the array controller (using NSNegateBoolean) but still nothing.
The other two methods I have tried is a custom NSValueTransformer for the
NSMenuItem and the validateMenuItem method. The transformer got called but I
logged the value it was passing in and it's the array myOptions not the
individual menu items. The validateMenuItem method worked for other UI
NSPopUpMenus but not the ones in my tableview.
Is this possible to do with bindings? Thanks for the help.
CT
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Re: How To Bind The Enabled Property of NSPopUpButtonCell Menu Items
Thanks for the suggestion, I had already done that to no avail. Where should I
be binding the enabled property? NSPopUpButtonCell or NSMenuItem?
CT
On Aug 2, 2013, at 1:33 PM, Lee Ann Rucker lruc...@vmware.com wrote:
Turn off Auto Enables Items in the popup's menu. If it's on it goes through
menu validation instead of bindings.
On Aug 2, 2013, at 1:12 PM, Chris Tracewell wrote:
I've got a two column NSTableView that is bound to an array controller. Each
of the elements in the array looks something like this...
NSMutableDictionary *theDictionary = [NSMutableDictionary
dictionaryWithDictionary: @{@myOptions:theOptionArray,@myTitle:
theTitle}];
Column 1 is bound to myTitle and column 2, whcih had an NSPopUpButtonCell in
it, is bound to myOptions. This all works up to this point, the menus
populate for each row in the table view and I can make selections and update
things in my controller. What I need to do is bind the individual enabled
state of each menu item in the myOptions array. Binding the enabled state
for the column does not work as it disables the entire menu. I've tried
binding to both NSPopUpButtonCell and its NSMenuItem but nothing happens
(all menu items remain enabled). Just to test I tried binding these two to
arrangedObjects @count of the array controller (using NSNegateBoolean) but
still nothing.
The other two methods I have tried is a custom NSValueTransformer for the
NSMenuItem and the validateMenuItem method. The transformer got called but I
logged the value it was passing in and it's the array myOptions not the
individual menu items. The validateMenuItem method worked for other UI
NSPopUpMenus but not the ones in my tableview.
Is this possible to do with bindings? Thanks for the help.
CT
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Re: How To Bind The Enabled Property of NSPopUpButtonCell Menu Items
I took a look, thanks for the files. I had both deselected already, still makes
no difference. I created a new project and rolled a stripped down version and
it acted the same way. I can't see how bindings and validateMenuItem can work
together in this scenario. I'm going to try catching change selections and
validate there as the revalidation only needs to happen after a change. I've
posted my simple project displaying the project if you're interested.
http://tinyurl.com/k3y7432
CT
On Aug 2, 2013, at 2:27 PM, Lee Ann Rucker lruc...@vmware.com wrote:
NSMenuItem. I noticed that the NSPopUpButtonCell also has an autoenables
items flag; a quick bit of hacking on the ButtonMadness sample app shows that
needs to be off too. I'll send you the files off-list.
On Aug 2, 2013, at 1:56 PM, Chris Tracewell wrote:
Thanks for the suggestion, I had already done that to no avail. Where should
I be binding the enabled property? NSPopUpButtonCell or NSMenuItem?
CT
On Aug 2, 2013, at 1:33 PM, Lee Ann Rucker lruc...@vmware.com wrote:
Turn off Auto Enables Items in the popup's menu. If it's on it goes
through menu validation instead of bindings.
On Aug 2, 2013, at 1:12 PM, Chris Tracewell wrote:
I've got a two column NSTableView that is bound to an array controller.
Each of the elements in the array looks something like this...
NSMutableDictionary *theDictionary = [NSMutableDictionary
dictionaryWithDictionary: @{@myOptions:theOptionArray,@myTitle:
theTitle}];
Column 1 is bound to myTitle and column 2, whcih had an NSPopUpButtonCell
in it, is bound to myOptions. This all works up to this point, the menus
populate for each row in the table view and I can make selections and
update things in my controller. What I need to do is bind the individual
enabled state of each menu item in the myOptions array. Binding the
enabled state for the column does not work as it disables the entire menu.
I've tried binding to both NSPopUpButtonCell and its NSMenuItem but
nothing happens (all menu items remain enabled). Just to test I tried
binding these two to arrangedObjects @count of the array controller (using
NSNegateBoolean) but still nothing.
The other two methods I have tried is a custom NSValueTransformer for the
NSMenuItem and the validateMenuItem method. The transformer got called but
I logged the value it was passing in and it's the array myOptions not the
individual menu items. The validateMenuItem method worked for other UI
NSPopUpMenus but not the ones in my tableview.
Is this possible to do with bindings? Thanks for the help.
CT
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NSPopUpButtonCell - How To Get The Changed Value
I have a tableview that has two columns. The second column has an NSPopUpButtonCell. The tableview content is supplied via an array controller of dictionaries. The first column shows the title key's value and the second column (the NSPopUpButtonCell) shows and array of choices in the dictionaries options key. The array is a property of the view controller. All of the bindings are functioning correctly but I can't seem to make KVO work since it's an array in a dictionary inside an array. Ideally I would observe the change and then update a separate object with the new value. Each of the NSPopUpButtonCells in the tableview has it's own distinct set of options which is why I have put them as a property in the dictionary. Since bindings seem impossible with this approach, I set the NSPopUpButtonCell's action to a method in my view controller with the thought of grabbing the new value and then updating my models property manually. However the action seems to be sent before bindings has actually updated anything so I still get the old value that is the value selected before I changed the selection in the menu. Anyway, I'm at a dead end and would really appreciate any help and critique. -CT ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: OutlineView shouldSelectItem Being Called Twice
Thanks for the reply. This OV is acting as a master for a detail view that must be saved before the selection changes if it's dirty. Is there another method to intercept the OV row click before selection actually changes wherein I can validate and present an NSAlert for save,cancel,discard options if need be? -CT On Jun 4, 2013, at 7:31 PM, Graham Cox graham@bigpond.com wrote: On 05/06/2013, at 11:56 AM, Chris Tracewell ch...@thinkcl.com wrote: Is this normal behavior? Thanks for the help. Probably. This method should just answer the question, not attempt to interrupt things by showing an alert etc. You'll need to put that functionality elsewhere. --Graham ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
OutlineView shouldSelectItem Being Called Twice
I've got a view controller set up as the delegate for an outlineView. The view
controller implements the -(BOOL)outlineView:(NSOutlineView *)outlineView
shouldSelectItem:(id)item delegate method. I show an alert and return NO if the
user has not saved some changes or return YES if all is well. The problem is
that when I return no the delegate method fires twice. Even when I strip out
all of my code and just log the method as shown below it shows two calls.
Returnign YES works fine. I thought maybe it's because it was firing once for
the original election change and then again to return back to the original
selection but logging item showed its the same row for both calls.
-(BOOL)outlineView:(NSOutlineView *)outlineView shouldSelectItem:(id)item
{
NSLog(@firing);
return NO;
}
Is this normal behavior? Thanks for the help.
-CT
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Re: Custom Delegate - Using _delegate works but not delegate or [self delegate]
On Mar 25, 2013, at 7:33 PM, Conrad Shultz conrad_shu...@apple.com wrote:
In the code you shared you had used delegate in one place and [self
delegate] in another; the second case is the correct one. If you replace all
naked uses of delegate with [self delegate] and you continue to get
compile-time errors please post your entire class or a reduced test case.
Okay, I am realizing that my original post was misleading about what the main
issue is. The main point I should have made is that [self delegate] is not
being allowed to handle my custom delegate methods. It is expecting a method
from NSOutlineViewDelegate. The error I am getting is
No known instance method for selector 'outlineView:enterKetPressedForRow:'
Can I make a category on NSOutlineViewDelegate? Here's my original code with
corrected [self delegate]
HEADER
#import Cocoa/Cocoa.h
@class TKOutlineView; // lets compiler know the @interface deleration is coming
since we put @protocol before it
// delegate protocol
@protocol TKOutlineViewDelegate NSObject // NSObject because we need to use
respondsToSelector
@optional
-(void)outlineView:(NSOutlineView *)theOutlineView
enterKeyPressedForRow:(NSInteger)theRow;
-(void)outlineView:(NSOutlineView *)theOutlineView
deleteKeyPressedForRow:(NSInteger)theRow;
@end
@interface TKOutlineView : NSOutlineView {}
@end
IMPLEMENTATION
#import TKOutlineView.h
@implementation TKOutlineView
-(void)keyDown:(NSEvent *)theEvent
{
if ([[theEvent characters] length] == 0)
{
// dead key
return;
}
else if ([[theEvent characters] length] == 1 [[theEvent characters]
characterAtIndex:0] == NSEnterCharacter [[self delegate]
respondsToSelector:@selector(outlineView: enterKeyPressedForRow:)])
{
[[self delegate] outlineView:self enterKeyPressedForRow:[self
selectedRow]]; /* ERROR THIS LINE */
}
else if ([[theEvent characters] length] == 1 [[theEvent characters]
characterAtIndex:0] == NSDeleteCharacter [[self delegate]
respondsToSelector:@selector(outlineView: deleteKeyPressedForRow:)])
{
[[self delegate] outlineView:self deleteKeyPressedForRow:[self
selectedRow]]; /* ERROR THIS LINE */
}
else
{
[super keyDown:theEvent];
}
}
@end
How can I get [self delegate] to recognize my custom methods?
CT
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Re: Custom Delegate - Using _delegate works but not delegate or [self delegate]
On Mar 26, 2013, at 12:38 PM, Quincey Morris
quinceymor...@rivergatesoftware.com wrote:
2. Redeclare the delegate property:
@interface TKOutlineView : NSOutlineView {}
@property (nonatomic,readonly) idTKOutlineViewDelegate delegate;
@end
@implementation TKOutlineView
@dynamic delegate;
…
[[self delegate] outlineView:self enterKeyPressedForRow:[self
selectedRow]];
…
The @dynamic statement says I don't have an implementation of the 'delegate'
property in this class, but that's just fine because it's already implemented
(in my superclass).
Aha, success. Thank you - a very elegant and sensible solution.
CT
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Re: Custom Delegate - Using _delegate works but not delegate or [self delegate]
On Mar 26, 2013, at 12:38 PM, Quincey Morris
quinceymor...@rivergatesoftware.com wrote:
2. Redeclare the delegate property:
@interface TKOutlineView : NSOutlineView {}
@property (nonatomic,readonly) idTKOutlineViewDelegate delegate;
@end
@implementation TKOutlineView
@dynamic delegate;
…
[[self delegate] outlineView:self enterKeyPressedForRow:[self
selectedRow]];
…
The @dynamic statement says I don't have an implementation of the 'delegate'
property in this class, but that's just fine because it's already implemented
(in my superclass).
Aha, success. Thank you - a very elegant and sensible solution.
CT
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Re: Custom Delegate - Using _delegate works but not delegate or [self delegate]
On Mar 26, 2013, at 1:11 PM, Conrad Shultz conrad_shu...@apple.com wrote: If code expecting an NSOutlineView receives a TKOutlineView instance it may break or behave unexpectedly since it may well try to set a delegate conforming to NSOutlineViewDelegate but you have made your class require a delegate conforming to the more specific TKOutlineViewDelegate. This is why I earlier suggested declaring a -customDelegate (or whatever you'd like to call it) property that would not interfere with the expected delegate behavior. -Conrad I think I understand, but have I really required such code to conform to TKOutlineViewDelegate? Wouldn't it be in error to hand code expecting NSOutlineView a TKOutlineView? It seems that since TKOutlineView is a subclass of NSOutlineView that only code that handles TKOutlineView objects will gain these new delegate methods. In addition, those methods do check to make sure the delegate implements the method before I actually send to it. I'm obviously not fully clear on this topic so thanks in advance for any input. CT ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Custom Delegate - Using _delegate works but not delegate or [self delegate]
I have a subclass of NSOutlineView that has custom delegate methods. In the
implementation file I get an error for No known instance method for
selector... when I call these declared methods using [self delegate] or
delegate. However the compiler suggested using _delegate and that makes the
error go away. I thought since my subclass inherits from NSOutlineView that
delegate would be recognized and available.
HEADER
#import Cocoa/Cocoa.h
@class TKOutlineView; // lets compiler know the @interface deleration is coming
since we put @protocol before it
// delegate protocol
@protocol TKOutlineViewDelegate NSObject // NSObject because we need to use
respondsToSelector
@optional
-(void)outlineView:(NSOutlineView *)theOutlineView
enterKeyPressedForRow:(NSInteger)theRow;
-(void)outlineView:(NSOutlineView *)theOutlineView
deleteKeyPressedForRow:(NSInteger)theRow;
@end
@interface TKOutlineView : NSOutlineView {}
@end
IMPLEMENTATION
#import TKOutlineView.h
@implementation TKOutlineView
-(void)keyDown:(NSEvent *)theEvent
{
if ([[theEvent characters] length] == 0)
{
// dead key
return;
}
else if ([[theEvent characters] length] == 1 [[theEvent characters]
characterAtIndex:0] == NSEnterCharacter [[self delegate]
respondsToSelector:@selector(outlineView: enterKeyPressedForRow:)])
{
[delegate outlineView:self enterKeyPressedForRow:[self
selectedRow]];
}
else if ([[theEvent characters] length] == 1 [[theEvent characters]
characterAtIndex:0] == NSDeleteCharacter [[self delegate]
respondsToSelector:@selector(outlineView: deleteKeyPressedForRow:)])
{
[delegate outlineView:self deleteKeyPressedForRow:[self
selectedRow]];
}
else
{
[super keyDown:theEvent];
}
}
@end
Is _delegate the correct usage here or have I done something else wrong? Thank
you.
CT
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Re: Custom Delegate - Using _delegate works but not delegate or [self delegate]
On Mar 25, 2013, at 1:54 PM, Conrad Shultz conrad_shu...@apple.com wrote: [self delegate] is not the same as delegate - the former sends the -delegate message, the latter references a variable named delegate (which the compiler is telling you does not exist). I assumed that since my subclass inherits from NSOutlineView which already has a delegate instance method that a delegate ivar already existed? Since this is occuring while converting to ARC could it be that _delegate is working because modern Objective-c adds the underscore to the front of ivars during synth? Still though, I do not understand why [self delegate] will not work. this must be that my delegate declarations are incorrect. For example, here you correctly use [self delegate] in the if() condition but improperly fall back to merely delegate for actually dispatching your delegate message. I had replaced [self delegate] with delegate while troubleshooting, but both trigger the error. I am transitioning to ARC, [self delegate] was working compiling in XCode 3.2 for 10.6.8. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
ARC Help
In a project I am moving from GC to ARC I'm trying to understand the nuances of
the new declarations. I have many pre-ARC properties that look like...
@interface TKObject : NSObject
{
NSString *theString;
}
@property(readwrite,assign) NSString *theString;
After ARC conversion it looks like
@interface TKObject : NSObject
{
NSString *__strong theString;
}
@property(readwrite,strong) NSString *theString;
My question is, couldn't it just as easily be written the same as the pre ARC
style sans assign in @property since strong is the default? I noticed that in
most of my files that the ARC conversion tool changes it simply replaced
properties with assign type with the strong and __strong designators. However
three files out of about 50 it just dropped the assign form @property. Is there
a difference or reason for this?
CT
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Re: ARC Help
On Mar 22, 2013, at 1:51 PM, Quincey Morris quinceymor...@rivergatesoftware.com wrote: Note that you can likely just remove the ivar declaration completely, or at worst move it to the @implemenation statement instead. There's really no need to put a private ivar in a public interface file any more. In this case this is a property though isn't it and not a private instance variable? It is synthesized in .m so there are public getters and setters. I'm a bit confused as I thought a synthesized property would require it to be declared in .h or it wouldn't compile. If you're going through the code cleaning things up, I'd also suggest you take the trouble to add 'nonatomic' to your properties generally, I don't have any need to worry about multi-threading so is your suggestion to declare nonatomic for speed since the default of atomic is overkill? or to add an explicit 'atomic' in only those cases where atomicity is required and (for custom accessors) actually implemented. Do you mean to add 'atomic' by not declaring 'nonatomic'? I just read that 'atomic' is not an actual keyword and will cause a crash... but that thread was from '09 -- http://stackoverflow.com/questions/588866/atomic-vs-nonatomic-properties By chance, did those 3 files have the ivars for the properties synthesized -- not explicitly declared? Not sure I follow you. Each followed the same structure - declared in @interface, designated with their own @property and then synthesized in .m. I didn't think there was any other option when declaring synthesized properties, however I still have much to learn. CT ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: ARC Help
On Mar 22, 2013, at 3:27 PM, Quincey Morris quinceymor...@rivergatesoftware.com wrote: (sorry, this turned into a tome) No need to apologize. Very, very helpful - thank you so much for the input, it clears everything up. I'll be reading up on the modern Objective-c changes. Thanks CT ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
How can modal window pass messages to its parent window?
I have a main window which has a child/auxilary window. When the user presses a button in the UI the main window controller inits the child, assigns itself as the object for the child window's myOwner property and then launches the child window as a modal via NSApp runModalForWindow. This worked fine in XCode 3 but now I'm finally making the leap to XCode 4.6 and converting to ARC and it does not like this semantic because it does not know what class myOwner is when I make method calls to it and thus gives me warnings all over the place. I can't really include the parent header in the child window controller as it is included in the parent window controller. How should I be doing this? myProductBuilderWindow = [[TKProductBuilderWindowController alloc] initWithWindowNibName:@ProductBuilder]; [myProductBuilderWindow setMyOwner:self]; [NSApp runModalForWindow:[myProductBuilderWindow window]]; Basically the main window controller has several properties, mostly arrays, that the child window needs access to to do its specialized work. CT ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Declaring Variables - Setting to nil VS Not Setting?
I usually use the sample in line 1 when declaring vars inside my methods. NSString *theString = [NSString string]; NSString *theString = nil; NSString *theString; I thought lines 2 and 3 were the same thing. I was wrong. What is the difference and when do you use the style shown in line 3? Thanks and pointers to docs are welcome. --chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Declaring Variables - Setting to nil VS Not Setting?
On Apr 26, 2012, at 1:17 PM, Fritz Anderson wrote: You should be able to get this from any elementary book about C. I'm sure you are correct. NSString *theString = nil; fills it with zero (not a pointer to anything). NSString *theString; and doesn't fill it with anything; the variable contains whatever junk was left in the portion of memory the variable now uses. Thank you these were excellent answers. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Declaring Variables - Setting to nil VS Not Setting?
On Apr 26, 2012, at 1:20 PM, David Duncan wrote: In C unless you explicitly initialize a local variable its value is undefined, and Objective-C inherits this behavior. Thank you, that was what I was after. I believe however that under ARC these lines are equivalent (at least thats my reading of section 4.2 on initialization at http://clang.llvm.org/docs/AutomaticReferenceCounting.html) but given your comments I suspect you are not using ARC. I'm using GC, still on 10.6 and XCode 3.2.6 --chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSDrawTiledRects Only Draws One Side
On Mar 13, 2012, at 5:27 PM, Jens Alfke wrote: On Mar 13, 2012, at 4:33 PM, Chris Tracewell wrote: NSDrawTiledRects(NSInsetRect(theVendorTextRect,10,10), theVendorTextRect, theSides, theGrays, 1); NSDrawTiledRects(theBillToTextRect, theBillToTextRect, theSides, theGrays, 1); NSDrawTiledRects(theShipToTextRect, theShipToTextRect, theSides, theGrays, 1); The last parameter is 1, so you’re only telling it to draw one edge. It looks like you meant to specify 4. (The count parameter should match the sizes of the arrays you pass for sides and grays.) —Jens Thanks Jen and also to John Brown. That fixed it. I had read the docs for the count parameter to mean stroke thickness. --Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
NSDrawTiledRects Only Draws One Side
Using XCode 3.2.6, OSX 10.6.8 - GC is on
I have three rects I am trying to stroke on all four sides using
NSDrawTiledRects however only the first side listed in my NSRectEdge list gets
drawn. I'm using the boundsRect as the clippingRect but that shouldn't should
it? I did experiment with insetting the bounds rect 10 points as you can see
bleow just in case it was getting clipped but it makes no diff.
NSRectEdge theSides[] = {NSMinXEdge,NSMaxXEdge,NSMinYEdge,NSMaxYEdge};
CGFloat theGrays[] = {NSBlack,NSBlack,NSBlack,NSBlack};
NSDrawTiledRects(NSInsetRect(theVendorTextRect,10,10), theVendorTextRect,
theSides, theGrays, 1);
NSDrawTiledRects(theBillToTextRect, theBillToTextRect, theSides, theGrays, 1);
NSDrawTiledRects(theShipToTextRect, theShipToTextRect, theSides, theGrays, 1);
Anyone have any suggestions?
--Chris
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draggingEntered Not Working As Expected
XCode 4, 10.6 GC -- I have an IKImageBrowserView which I have implemented drag
and drop for. I have set my view controller as the image browser's drag
delegate, registered for pasteboard drag types in awakeFromNib and implemented
DnD protocol methods like so...
-(void)awakeFromNib
{
[myProductImageBrowser registerForDraggedTypes: [[NSArray
arrayWithObjects:@productIndexObjectType,NSFilenamesPboardType, nil]
arrayByAddingObjectsFromArray:[NSImage imagePasteboardTypes]]];
}
-(NSDragOperation)draggingEntered:(id NSDraggingInfo)sender
{
NSLog(@DND Entered);
return NSDragOperationNone;
}
-(NSDragOperation)draggingUpdated:(id NSDraggingInfo)sender // validate
position
{
NSLog(@DND Uppdated);
if ([myProductImageBrowser dropOperation] == IKImageBrowserDropOn)
{
return NSDragOperationEvery;
}
return NSDragOperationNone;
}
-(BOOL)performDragOperation:(id NSDraggingInfo)sender // Drop Occured
{
NSLog(@DND Perform);
NSArray *theFileArray = [[sender draggingPasteboard]
propertyListForType:NSFilenamesPboardType];
if ([theFileArray count] == 1)
{
NSImage *theImage = [[NSImage alloc]
initWithContentsOfFile:[theFileArray objectAtIndex:0]];
if (theImage)
{
TKProductMaster *theProductMaster =
[[myProductMasterArrayController arrangedObjects]
objectAtIndex:[myProductImageBrowser indexAtLocationOfDroppedItem]];
[theProductMaster setMyImage:theImage];
[theProductMaster setImageVersion:[theProductMaster
imageVersion] + 1]; // up the version number so the image browser knows to
trash onld image cache
[myProductImageBrowser reloadData];
return YES;
}
}
return NO;
}
QUESTION #1
I will test for the other pboard types later, but right now what is confusing
me is that draggingEntered, which returns NSDragOperationNone, is not stopping
anything. The logs are showing so it is getting called. I did read in the
NSDraggingDestination Protocol Reference that draggingUpdated draggingExited
will still get called even if draggingEntered returns NSDragOperationNone.
Okay, but when I comment out draggingUpdated the image browser still accepts
drags. Why? Shouldn't it cut off dragging altogether if draggingUpdated is
never called to return NSDragOperationEvery?
QUESTION #2
I do not understand the difference between prepareForDragOperation: and
performDragOperation: as they both seem to be called at the same time and have
access to the same sender / info. As it is, I am only implementing
performDragOperation to validate the final drop and perform the final work.
--Chris___
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Why am I getting May Not Respond warnings for Super
I have a private framework that is included in a project. Many of the project classes descend from a class in the framework. All of these descendent classes implement copyWithZone, encodeWithCoder and initWithCoder and thus respectively calls each on super. I get warnings stating that MySuperClass may not respond to -copyWithZone and so on. I do declare each of these methods in super's header file, so why might these errors be getting triggered? Thanks --Chris___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Why am I getting May Not Respond warnings for Super
On Jul 21, 2011, at 9:33 AM, Nick Zitzmann wrote: On Jul 21, 2011, at 9:51 AM, Chris Tracewell wrote: I have a private framework that is included in a project. Many of the project classes descend from a class in the framework. All of these descendent classes implement copyWithZone, encodeWithCoder and initWithCoder and thus respectively calls each on super. I get warnings stating that MySuperClass may not respond to -copyWithZone and so on. I do declare each of these methods in super's header file, so why might these errors be getting triggered? I don't know whether it will make a difference or not, but one thing you ought to try is instead of declaring the methods in the header file, you should declare the class's compliance with the proper protocols (NSCopying and NSCoding in this case). That's the proper way of declaring support for copying and coding. It's a little different from C++, you see. Nick Zitzmann http://www.chronosnet.com/ Nick, Thanks, that did it. Added the protocol declarations in the interface and it cleared things up. For future reference you need to add the declaration of protocol conformity like so... @interface MyClass : NSObject NSCopying You can comma separate multiple protocols. --Chris___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSTableView auto sorting does not work
On Fri, Feb 11, 2011 at 5:14 PM, Chris Tracewell ch...@thinkcl.com wrote: I have experienced that an NSTableview which is bound to an array controller will sometimes automatically sort when their column headers are clicked and sometimes not. As an example, I currently have two windows, each with a tableview bound to an array controller. One tableview sorts, the other does not. For both tableviews each column is bound to the arranged objects of its respective array controller and has Creates Sort Descriptor selected in IB.Yes, I could use delegates and implement my own sort descriptors but getting free sorting is really nice and it works for some of my tableviews, so I'd like to find out what breaks this functionality. I got this to work. I noticed in Tableview 1 that I never bound its content or selectionindexes to the array controller, only the actual columns were bound and automatic sorting worked. In tableview 2 I had those two properties bound and when I unbound them automagic sorting began working. I assume that since I had set the selectionIndexes and content properties of the tableview the automagic sortDescriptor creation and binding assumed I was taking over and stopped doing their thing. Also worthy of noting is that binding using display patterns on tv columns will also break auto sorting. That was fine for me as it made sense to provide a property via my model anyway. I would really appreciate anyone pointing me to docs that explain this if it exists so I can be confident in my assumptions. --Chris___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSTableView auto sorting does not work
Did you actually bind the table view's sortDescriptors binding to the array controller's sortDescriptors property? No, but that's why I posted, trying to figure out when this can be avoided. In the simplest case (all columns bound to different keys on the same NSArrayController), NSTableView will automagically bind its selectedIndexes and its sortDescriptors bindings to the relevant properties on the array controller. But if your columns aren't all bound to the same array controller, the table view can't logically do this, so you are responsible for binding these yourself. This is helpful, thanks for explaining. I am however, using only one NSArrayController between all of the columns and am not using any display patterns (I noticed they do not offer the Creates Sort Descriptor option). At this point I could just move on and set my Array Controller's sortDescriptor property but it just really bugs me to not know what line I am crossing that disables the automagic functionality. --Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
NSTableView auto sorting does not work
I have experienced that an NSTableview which is bound to an array controller will sometimes automatically sort when their column headers are clicked and sometimes not. As an example, I currently have two windows, each with a tableview bound to an array controller. One tableview sorts, the other does not. For both tableviews each column is bound to the arranged objects of its respective array controller and has Creates Sort Descriptor selected in IB.Yes, I could use delegates and implement my own sort descriptors but getting free sorting is really nice and it works for some of my tableviews, so I'd like to find out what breaks this functionality. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
NSScanner Failing with EXC_BAD_ACCESS
NOTE :: GC Enabled
I am using an NSScanner in an NSString category but am crashing whenever I try
to log the string I scanned into or to return it. If I comment out the NSLog
there are no problems.
NSString *theScannedString;
NSScanner *theScanner = [NSScanner scannerWithString:theNewHTML];
NSCharacterSet *theCharacterSet = [NSCharacterSet
characterSetWithCharactersInString:@1234567890abcdefghijklmnopqrstuvwxyz...@#$%^*()-_=+?,./:\;'[]\{}|
];
[theScanner scanCharactersFromSet:theCharacterSet intoString:theScannedString];
NSLog(@%@,theScannedString);
Does anyone have a hint as to what may be the issue?
Thanks
--chris___
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Re: NSScanner Failing with EXC_BAD_ACCESS
Thanks all. I got it working, indeed the Scanner was failing, which as Kiel
suggested, must have led to an invalid pointer by the time I tried to
log/return it. Once I checked the BOOL it quit crashing and then with some
reworking of my NSScanner code it processed and returned the string I wanted.
Thanks again for the help.
--chris
On Oct 15, 2010, at 12:08 PM, Kiel Gillard wrote:
http://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSScanner_Class/Reference/Reference.html#//apple_ref/occ/instm/NSScanner/scanCharactersFromSet:intoString:
You pass by reference to the - [NSScanner scanCharactersFromSet:intoString:]
method an uninitialised pointer to a NSString object.
Consider the return value of the - [NSScanner
scanCharactersFromSet:intoString:] method. If the method fails to scan the
given characters and returns NO, your theScannedString pointer is probably
still invalid.
Kiel
On 16/10/2010, at 5:44 AM, Chris Tracewell wrote:
NOTE :: GC Enabled
I am using an NSScanner in an NSString category but am crashing whenever I
try to log the string I scanned into or to return it. If I comment out the
NSLog there are no problems.
NSString *theScannedString;
NSScanner *theScanner = [NSScanner scannerWithString:theNewHTML];
NSCharacterSet *theCharacterSet = [NSCharacterSet
characterSetWithCharactersInString:@1234567890abcdefghijklmnopqrstuvwxyz...@#$%^*()-_=+?,./:\;'[]\{}|
];
[theScanner scanCharactersFromSet:theCharacterSet
intoString:theScannedString];
NSLog(@%@,theScannedString);
Does anyone have a hint as to what may be the issue?
Thanks
--chris___
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Re: NSImage is Caching
Thanks for the suggestions, I did try that and -recache as well but neither
works. I really think this has to be related to the URL caching but I am not
sure where to start. I've been diggin through NSURL, NSURLConnection and
NSURLCache but have yet to find the solution.
-chris
On Oct 6, 2010, at 4:45 AM, slasktrattena...@gmail.com wrote:
NSImage has a -setCachePolicy: (?) method. Not sure if it's the right
name, but you can look it up in the docs.
On Tue, Oct 5, 2010 at 11:46 PM, Chris Tracewell ch...@thinkcl.com wrote:
I have an NSImageView that accepts an image drop then sizes the image and
ftp's it to a web server. The image view is bound to myObject.myImage
property which set by a window controller calling its loadMyImage every time
the window opens...
-(void)loadMyImage
{
NSImage *theImage = [[NSImage alloc] initWithContentsOfURL: theURL];
[self setMyImage: theImage];
}
The problem is that the image is being cached and I cannot figure out how. I
can drop images galore and it ftp's them to their final destination --
which is where the image is loaded from. However, the image will stay the
same even when I destroy myObject, create another one and it calls
loadMyImage method again. Even between application restarts.
This must be a setting in NSURL or NSURLConnection or NSURLCache, anyone
have a clue as to where to start? FWIW - my web browser always shows the
freshest image.
Thanks in advance.
-- chris
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NSImage is Caching
I have an NSImageView that accepts an image drop then sizes the image and ftp's
it to a web server. The image view is bound to myObject.myImage property which
set by a window controller calling its loadMyImage every time the window
opens...
-(void)loadMyImage
{
NSImage *theImage = [[NSImage alloc] initWithContentsOfURL: theURL];
[self setMyImage: theImage];
}
The problem is that the image is being cached and I cannot figure out how. I
can drop images galore and it ftp's them to their final destination -- which
is where the image is loaded from. However, the image will stay the same even
when I destroy myObject, create another one and it calls loadMyImage method
again. Even between application restarts.
This must be a setting in NSURL or NSURLConnection or NSURLCache, anyone have a
clue as to where to start? FWIW - my web browser always shows the freshest
image.
Thanks in advance.
-- chris
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Re: NSImage is Caching
Shoulda said I'm using GC
On Oct 5, 2010, at 2:56 PM, Jonathon Kuo wrote:
You're missing a [theImage release] at the end of your method.
On Oct 5, 2010, at 2:46 PM, Chris Tracewell wrote:
I have an NSImageView that accepts an image drop then sizes the image and
ftp's it to a web server. The image view is bound to myObject.myImage
property which set by a window controller calling its loadMyImage every time
the window opens...
-(void)loadMyImage
{
NSImage *theImage = [[NSImage alloc] initWithContentsOfURL: theURL];
[self setMyImage: theImage];
}
The problem is that the image is being cached and I cannot figure out how. I
can drop images galore and it ftp's them to their final destination --
which is where the image is loaded from. However, the image will stay the
same even when I destroy myObject, create another one and it calls
loadMyImage method again. Even between application restarts.
This must be a setting in NSURL or NSURLConnection or NSURLCache, anyone
have a clue as to where to start? FWIW - my web browser always shows the
freshest image.
Thanks in advance.
-- chris
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Re: Cocoa-dev Digest, Vol 7, Issue 890
On Sep 8, 2010, at 10:21 AM, cocoa-dev-requ...@lists.apple.com wrote:
The message in the 'if' ([theNumOne compare:theNumTwo]) is an invocation of
[NSNumber compare:], not [NSDecimalNumber compare:]. It's not absolutely
clear what is supposed to happen when the compare parameter is an instance of
NSDecimalNumber. Yes, NSDecimalNumber is a subclass of NSNumber, but these
are abstract classes. The actual objects are (typically) concrete subclasses
of the abstract classes, such as NSCFNumber. It's possible that this muddies
the waters enough that the mixed comparison doesn't work as you would expect.
In any case, why not simply do the comparison between 'self' and
'[NSDecimalNumber zero]'?
Quincy thanks for the response... I moved to NSDecimalNumber but am still
getting strange behavior. I am truly perplexed - the boolean YES is being
returned as -256. I think my problem is with how BOOL is being passed, cast,
interpreted... I know it is typedef, it's as if though something is getting
lost in translation. Take a look at the three following code fragments to see
the strangeness. I should mention that the category this is being called from
is in a private linked framework, if that makes any difference.
The following are called by an NSDecimalNumber with a value of 192.2
// == WORKS :: returns 0
-(BOOL)isLessThanZero
{
if ([[NSDecimalNumber zero] compare:self] == NSOrderedDescending)
{
return [[NSDecimalNumber zero] compare:self] ==
NSOrderedDescending;
}
return NO;
}
// == DOES NOT WORK :: returns -256
-(BOOL)isLessThanZero
{
if ([[NSDecimalNumber zero] compare:self] == NSOrderedDescending)
{
return YES;
}
return NO;
}
// == DOES NOT WORK :: returns -256
-(BOOL)isLessThanZero
{
return [[NSDecimalNumber zero] compare:self] == NSOrderedDescending;
}
Any ideas?___
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Re: NSNumber compare: Giving Unexpected Results
On Sep 8, 2010, at 10:21 AM, cocoa-dev-requ...@lists.apple.com wrote:
The message in the 'if' ([theNumOne compare:theNumTwo]) is an invocation of
[NSNumber compare:], not [NSDecimalNumber compare:]. It's not absolutely
clear what is supposed to happen when the compare parameter is an instance of
NSDecimalNumber. Yes, NSDecimalNumber is a subclass of NSNumber, but these
are abstract classes. The actual objects are (typically) concrete subclasses
of the abstract classes, such as NSCFNumber. It's possible that this muddies
the waters enough that the mixed comparison doesn't work as you would expect.
In any case, why not simply do the comparison between 'self' and
'[NSDecimalNumber zero]'?
Sorry for the last reply - I had the wrong subject line. I have nailed down
that it seems that the BOOL is being returned as something other than char 1 ||
char 0 from the private framework where the category exists. The following
works though, I know it's bad to use NSInteger values instead of BOOL but at
this point I am at a dead end
//=== WORKS
-(BOOL)isLessThanZero
{
NSInteger theInteger = 0;
if ([[NSDecimalNumber zero] compare:self] == NSOrderedDescending)
{
theInteger = 1;
}
return theInteger;
}
--chris___
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Re: NSNumber compare: Giving Unexpected Results
On Sep 8, 2010, at 12:02 PM, cocoa-dev-requ...@lists.apple.com wrote:
It's not YES that's being returned as -256, but NO. (The answer is NO in
all 3 cases.) -256 is 0xFF00, so you can see that NO (i.e. (signed char)
0) is being correctly returned in the low order byte, with trash in the high
order bytes that's left over from earlier code.
So, the problem is not your 'isLessThanZero' method, but the calling code,
which is treating the returned value as an int (or something). Presumably the
calling code was compiled with an incompatible declaration of your method, or
of the BOOL type.
Thanks Quincey, your suggestion got me looking at the calling model and I got
it working by first assigning the result as a BOOL rather than just using the
result inside of an if logic statement like so...
// == Did NOT Work =//
if ([theDecimalNumber isLessThanZero])
{
... do something
}
// == DID Work =//
BOOL theResult = [theDecimalNumber isLessThanZero];
if (theResult)
{
... do something
}
I must admit that I do not understand why this is so. I can for example use if
([someButton isEnabled]) and it returns a BOOL and the if statement works
fine. If you have any pointers or docs that explains this further I would
really appreciate it as right now I feel scared about how I have been
evaluating BOOL's returned in all of my own custom methods.
--chris___
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Re: NSNumber compare: Giving Unexpected Results
On Sep 8, 2010, at 1:29 PM, Greg Parker wrote:
On Sep 8, 2010, at 12:40 PM, Chris Tracewell wrote:
On Sep 8, 2010, at 12:02 PM, cocoa-dev-requ...@lists.apple.com wrote:
It's not YES that's being returned as -256, but NO. (The answer is NO in
all 3 cases.) -256 is 0xFF00, so you can see that NO (i.e. (signed
char) 0) is being correctly returned in the low order byte, with trash in
the high order bytes that's left over from earlier code.
So, the problem is not your 'isLessThanZero' method, but the calling code,
which is treating the returned value as an int (or something). Presumably
the calling code was compiled with an incompatible declaration of your
method, or of the BOOL type.
Thanks Quincey, your suggestion got me looking at the calling model and I
got it working by first assigning the result as a BOOL rather than just
using the result inside of an if logic statement like so...
// == Did NOT Work =//
if ([theDecimalNumber isLessThanZero])
{
... do something
}
// == DID Work =//
BOOL theResult = [theDecimalNumber isLessThanZero];
if (theResult)
{
... do something
}
I must admit that I do not understand why this is so. I can for example use
if ([someButton isEnabled]) and it returns a BOOL and the if statement
works fine. If you have any pointers or docs that explains this further I
would really appreciate it as right now I feel scared about how I have been
evaluating BOOL's returned in all of my own custom methods.
I bet you have a compiler warning at this call site that says warning:
'NSDecimalNumber' may not respond to '-isLessThanZero'. That means the
compiler can't see the method declaration for -isLessThanZero at the call
site. In that case, the compiler guesses that the method returns `int`, which
is wrong and will cause incorrect handling of the BOOL value on some
architectures.
You need to (1) put your category's @interface in a header file, and (2)
import that header file here.
--
Greg Parker gpar...@apple.com Runtime Wrangler
Greg,
That was it :-) I had not imported ANY category headers in my framework -
most had worked anyway in my linking project so I figured it was some
framework magic behind the scenes recognizing them and making them work. After
linking them my warning count went way down and I am getting syntax coloring
now too - bonus!
I wanted to sneak in one last question - is it safe to compare an
NSDecimalNumber to an NSNumber and visa versa?
Thanks for taking the time to respond.
-chris___
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NSNumber compare: Giving Unexpected Results
I have a category on NSDecimalNumber that seems very straight forward - yet is
producing odd results. The code below shows my logging and everything outputs
as expected - but the final evaluation does not work. Am I misunderstanding
something?
-(BOOL)isLessThanZero
{
NSNumber *theNumOne = [NSNumber numberWithInteger:0];
NSNumber *theNumTwo = self;
NSLog(@theNumOne = %@,theNumOne);
NSLog(@theNumTwo = %@,theNumTwo);
NSLog(@NSOrderedSame = %d, NSOrderedAscending = %d,
NSOrderedDescending = %d,NSOrderedSame,NSOrderedAscending,NSOrderedDescending);
NSLog(@SHOULD SAME = %d,[theNumTwo compare:theNumTwo]);
NSLog(@SHOULD ASCD = %d,[theNumOne compare:theNumTwo]);
NSLog(@SHOULD DESD = %d,[theNumTwo compare:theNumOne]);
if ([theNumOne compare:theNumTwo] == NSOrderedDescending)
{
return YES;
}
return NO;
}
The above NSLogs produce.
2010-09-07 17:52:52.559 TheApp[80337:a0f] theNumOne = 0
2010-09-07 17:52:52.559 TheApp[80337:a0f] theNumTwo = 191.2
2010-09-07 17:52:52.560 TheApp[80337:a0f] NSOrderedSame = 0, NSOrderedAscending
= -1, NSOrderedDescending = 1
2010-09-07 17:52:52.560 TheApp[80337:a0f] SHOULD SAME = 0
2010-09-07 17:52:52.560 TheApp[80337:a0f] SHOULD ASCD = -1
2010-09-07 17:52:52.560 TheApp[80337:a0f] SHOULD DESD = 1
When I do the comparison from the controller instead of using the above
category it works fine. Thanks in advance for any help.
--chris___
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How to search for specific bindings in IB
On occasion I refactor a controller or model by deleting a property. I do my best to remove associated bindings in IB, but many times I miss something - a textfield bound to a deleted property for example. This leads to... this class is not key value coding-compliant for the key myProperty. In larger NIB files this can be hard to find and remove. Is there anyway to search IB for bindings other than selecting individual elements and looking at the bindings inspector? Thanks -- chris___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Best Way To Bind Sum/Difference of Two Arrays?
I have two arrays, A and B, that each contain objects that have a myTotal
property. In IB I use an array controller for each and show their contents in
separate NSTableview's and then display the sum for each by binding to
respective NSTextField's using the @sum array operator on their arrangedObjects
property.
Now I want to bind the difference between array A and array B but am having
problems. In my model where the arrays reside, I added a readonly property for
myDifference. I implemented the method for -(NSDecimalNumber *)myDifference
like so...
-(NSDecimalNumber *) myDifference
{
NSDecimalNumber *theTotalArrayA = [self
valueForKeyPath:@myarra...@sum.mytotal];
NSDecimalNumber *theTotalArrayB = [self
valueForKeyPath:@myarra...@sum.mytotal];
return [theTotalArrayA decimalNumberBySubtracting: theTotalArrayB];
}
This works when the view is first loaded but does not change myDifference when
the user changes A or B total in the UI. To get myDifference to adjust I
implementing in the model...
+(NSArray*)keyPathsForValuesAffectingMyDifference
{
return [NSArray arrayWithObjects: @myArrayA,@myArrayB,nil];
}
This works if I add or remove items to the arrays but does not change
myDifference if myTotal is changed for any of the objects in either of the
arrays. How do I achieve this? Should I manually observe change in the
controller using controlTextDidEndEditing delegate for the TableView's and then
send a setMyDifference message to the model object? Or am I missing a more
elegant solution?
Thanks
-- Chris___
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Cannot Validate Property - ioValue
Using GC, 10.6 and XCode 3.2.2 - I just implemented a validation method for the
myQuantity property of one of my models and cannot get it to work. The
problem is with the ioValue, it locks up the app whenever I try to read it.
After much frustration I simplified the validation to below an it still hangs...
-(BOOL)validateMyQuantity:(id *)ioValue error:(NSError **)outError
{
NSLog(@%@,ioValue);
return YES;
}
If I use an integer or float formatter in the NSLog it works, but it just seems
to be reading the memory address. This makes me think that the ioValue is not
an object. However, the property myQuantity is an NSDecimalNumber and works
fine throughout the app. The property validation is being triggered from an
NSTableView column bound to an array - there are no value transformers or
number formatters on the column.
Thanks
Chris___
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Re: Compile Error: undeclared (first use in this function) -- While Init'ing an Object
On Jun 24, 2010, at 6:59 PM, Graham Cox wrote: On 25/06/2010, at 7:52 AM, Chris Tracewell wrote: Obviously, I have a setting wrong somewhere as it is seeing an older version of the framework than I am linking to. Any thoughts where I should look? If the problem is that it can't see a certain class in the framework, have you made sure that the header for that class has its role set to 'Public'? That causes it to get copied into the framework's headers directory that your client code should be looking for. The other thing you should do if the framework is embedded in the app is to set both the framework and app to build to the same directory. The documentation on embedding frameworks explains how. What you want to avoid is your framework ending up in ~/Library/Frameworks or /Library/Frameworks so check those places for old versions. --Graham Thanks Graham - I had made the headers all public. Also, I had the frameworks build directory set to @executable_path/../Frameworks. I did take your advice and checked /Library/Frameworks and ~/Library/Frameworks but neither had them there. I did get it working however, kind of by accident - I renamed the enclosing directory that houses all of the different versions of the framework which caused me to have to re-embed the framework into the linking app, like I had done a million times before trying to get this to work, an wallah, everything works. It sounds crazy, but somewhere there had to be a cached reference or setting that was causing it to stick with the previous fw version - even after cleaning and building and re-linking to the correct fw version over and over. Maybe I'm crazy. (likely) --Chris___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Compile Error: undeclared (first use in this function) -- While Init'ing an Object
On Jun 22, 2010, at 2:11 PM, Kyle Sluder wrote: On Tue, Jun 22, 2010 at 2:03 PM, Chris Tracewell ch...@thinkcl.com wrote: I have my own custom framework. The framework builds fine but when I link to it in one of my projects one class is causing a compile error of... 'MyClass' undeclared (first use in this function) This occurs when I am trying to init MyClass inside a view controller's .m file in one of it's methods like so... MyClass *theClass = [MyClass new]; Did you remember to #import the header file that declares MyClass's interface? --Kyle Sluder Okay - almost have this solved. I found that the linking project is still including an older version of the framework even though I have thrown out the build directories, cleaned and rebuilt for both it and the framework several times and have re-linked the new framework so many times it is silly. Obviously, I have a setting wrong somewhere as it is seeing an older version of the framework than I am linking to. Any thoughts where I should look? Thanks --Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Compile Error: undeclared (first use in this function) -- While Init'ing an Object
I have my own custom framework. The framework builds fine but when I link to it in one of my projects one class is causing a compile error of... 'MyClass' undeclared (first use in this function) This occurs when I am trying to init MyClass inside a view controller's .m file in one of it's methods like so... MyClass *theClass = [MyClass new]; In the framework the header file is set to public and I can see it in the build and the linking project colors the code to show it recognizes the class. The framework itself uses this class in several places and it does not throw any compile errors. I have cleaned and built both the framework and linking project a gizillion times hoping to jiggle something - but no luck. Any suggestions? - Chris XCode 3.2.2 :: GC :: OS X 10.6___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Compile Error: undeclared (first use in this function) -- While Init'ing an Object
On Jun 22, 2010, at 2:11 PM, Kyle Sluder wrote: On Tue, Jun 22, 2010 at 2:03 PM, Chris Tracewell ch...@thinkcl.com wrote: I have my own custom framework. The framework builds fine but when I link to it in one of my projects one class is causing a compile error of... 'MyClass' undeclared (first use in this function) This occurs when I am trying to init MyClass inside a view controller's .m file in one of it's methods like so... MyClass *theClass = [MyClass new]; Did you remember to #import the header file that declares MyClass's interface? --Kyle Sluder I did - I import one main header for the framework the imports all of the framework header files. I checked it in the linking project, it is there in the Copy phase of my target and it does import have the #import MyClass.h line plus I can see MyClass.h is in the Copy phase of the linking projects target as well. However, your suggestion prompted me to try importing just MyFramework/MyClass.h in the view controller class that is getting the error and it couldn't find it. Then I tried the same with other classes in the framework and it was fine. It's like it's there, I can see it, but it is not finding it. As I stated in the first post I have checked several times to make sure MyClass is set to public in the framework. Thanks --Chris___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: My Custom Framework Is Not Exporting One of My Header Files
On Jun 8, 2010, at 6:26 PM, Graham Cox wrote: On 09/06/2010, at 11:20 AM, Chris Tracewell wrote: Why would it not be exporting the file? Yes, I added it to the target when I created the file. Right-click the file in Xcode and set its role to Public. This necessary step is very obscure and the menu doesn't reflect the currently set role. File bugs. --Graham Thanks to both Graham and Kiel - setting the Role to Public did the trick. - Chris___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
My Custom Framework Is Not Exporting One of My Header Files
I just made my first private framework a few weeks ago. I took some common categories and custom classes I use across projects and put them in my new FW. All has been fine until today when I added a new class file to it. I clean and build the FW and then build my project that is utilizing the FW and I get an error saying there is No such file or directory - referring to my new class file in the FW. FWIW, I use #import MyFramework/MyFramework.h in my project as it imports all the FW headers - standard protocol. After I build the FW I look in MyFramework - build - Release - MyFramework.framework - Headers and can see the header is indeed missing. I know this is the correct directory because I can see MyFramework.framework being deleted when I clean the FW target. Why would it not be exporting the file? Yes, I added it to the target when I created the file. Thanks for the help -Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Does XCode 3.2 Documentation Browser Stink?
Noted... I'll file the bug report but will spare the xcode-users subscribers the post as you answered my question. Thank you. --Chris On Apr 15, 2010, at 5:28 PM, Kyle Sluder wrote: On Thu, Apr 15, 2010 at 4:48 PM, Chris Tracewell ch...@thinkcl.com wrote: Okay, so now that I flew off the handle in this rant, will someone please tell me I am wrong and there is a classic doc browser option or third party browser? There is not. Regardless of its validity, this rant really belongs on xcode-users and in a bug report. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Does XCode 3.2 Documentation Browser Stink?
Am I missing something or does the new Documentation viewer for XCode 3.2 suck? I just upgraded my dev machine to Snow Leopard and installed XCode 3.2 and went to look up some Obj-C classes and everything is wacked. Gone is the filtered search results TableView above my the documentation pages - and its nice sortable columns where I can quickly adjust results. In its place seems to be a crappy HTML/Javascript list view with no sort capabilities at all. In addition is there a way to turn off all of the stupid Full Text and Title results... I don't want those - they just slow things down and add visual clutter when trying to find API info - which is what I am after most of the time. Why has the Doc Browser regressed here where before I could make those choices? Another gripe - I have to now click a pull down to see what Doc Sets I am searching in whereas before I could just look at the selected buttons. Okay, so now that I flew off the handle in this rant, will someone please tell me I am wrong and there is a classic doc browser option or third party browser? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSImageView Will Not Alias Images
On Apr 6, 2010, at 8:16 PM, Ken Ferry wrote: This was once true, but is out of date. I'd like to see a test app. For example, how do you know you aren't getting antialiasing? It may be that you just don't like the output. :-) Well - NSImageInterpolationHigh and NSImageInterpolationNone produce the same exact result - screen shot copy (control-command-shift-4) the imageView built once using NSImageInterpolationHigh and once using NSImageInterpolationNone then paste each into a Photoshop layer, align them perfectly and then turn the top layer off and on at 800% and there is not a single pixel that moves or changes color. The dropped image is roughly 1000 x 1000 (a screen shot PNG) and the imageView size is 200x200 To make sure the currentContext was correct - I log [[NSGraphicsContext currentContext] imageInterpolation] for each build and it shows the correct values 3 and 1 respectively. And then just to be super sure I I log [[NSGraphicsContext currentContext] isDrawingToScreen] inside drawRect of my NSImageView subclass and get YES. I did implement my own image sizing in drawRect and then used [self setImage] and it works great. Not sure what could be the issue. It would also be good to know what OS you are working on. -Ken I'm using 10.5.8. - XCode 3.1.2 - iMac Core 2 Duo and the app is GC. What Jens is saying is probably true in 10.5, not in 10.6. Nevertheless, I would be interested to see a test app. -Ken Cocoa Frameworks Thought I'd add some closure to this, even though it's a week later. I believe Ken's original assessment to be accurate - that I am just not happy with the resampling that NSImageView is doing. Using larger images with lots of detail, like a screenshot, the problem is more pronounced, the same is true for images with thin diagonal lines. More organic images that aren't too big produce acceptable results. Of note, I tested an image in Photoshop that was struggling in the ImageView and found that by sizing to the same size as the ImageView using, Nearest Neighbor as the sampling method, resulted in identical distortion or lack of smoothness per se. Nearest Neighbor has been a resampling method in PS for as long as I can remember, but I isn't really an anti-alias resampling method - it chooses the pixel values by proximity and duplicates it - thus no new color values get produced. I have used it in the past when needing to take, for example, a small bit icon or type element that I want to enlarge without aliasing, to keep a pixel accurate representation at a larger scale. Using this method to downsize will give mediocre results at best. All of that to say, it seems that an NSImageView in = 10.5 you'll be getting that method for resampling - so yes it resamples, but the method is not optimal. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
NSImageView Will Not Alias Images
I am trying to get NSImageView to alias dropped images, but it
refuses. Just spent an hour looking and trying several variations to
no avail. Here's what I have done in a subclass of NSImageView.
-(void)drawRect:(NSRect)rect
{
[[NSGraphicsContext currentContext]
setImageInterpolation:NSImageInterpolationHigh];
[[NSGraphicsContext currentContext] setShouldAntialias:YES];
[super drawRect:rect];
}
I have assigned the ImageView in IB my subclass and used NSLog to
verify that it is drawing through the above drawRect method of my
subclass - but the images (PNG screen captures) will not alias.
Any suggestions?
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Re: NSImageView Will Not Alias Images
On Apr 6, 2010, at 4:50 PM, Ken Ferry wrote: On Tue, Apr 6, 2010 at 2:58 PM, Jens Alfke j...@mooseyard.com wrote: On Apr 6, 2010, at 1:17 PM, Chris Tracewell wrote: I am trying to get NSImageView to alias dropped images, but it refuses. Nitpick: you mean antialias. Aliasing is what creates the jaggies, antialiasing smooths them away. Just spent an hour looking and trying several variations to no avail. Here's what I have done in a subclass of NSImageView. I remember having to deal with this too, years ago. It's too bad AppKit hasn't added support for this yet :( The problem is that NSImageView internally keeps a scaled copy of the image. So the actual scaling that creates the aliasing isn't done in the drawRect: method at all. This was once true, but is out of date. I'd like to see a test app. For example, how do you know you aren't getting antialiasing? It may be that you just don't like the output. :-) Well - NSImageInterpolationHigh and NSImageInterpolationNone produce the same exact result - screen shot copy (control-command-shift-4) the imageView built once using NSImageInterpolationHigh and once using NSImageInterpolationNone then paste each into a Photoshop layer, align them perfectly and then turn the top layer off and on at 800% and there is not a single pixel that moves or changes color. The dropped image is roughly 1000 x 1000 (a screen shot PNG) and the imageView size is 200x200 To make sure the currentContext was correct - I log [[NSGraphicsContext currentContext] imageInterpolation] for each build and it shows the correct values 3 and 1 respectively. And then just to be super sure I I log [[NSGraphicsContext currentContext] isDrawingToScreen] inside drawRect of my NSImageView subclass and get YES. I did implement my own image sizing in drawRect and then used [self setImage] and it works great. Not sure what could be the issue. It would also be good to know what OS you are working on. -Ken I'm using 10.5.8. - XCode 3.1.2 - iMac Core 2 Duo and the app is GC. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Correct way to overide synthesized setter?
I have two synthesized properties - A and B. Whenever A changes I need
B to be updated to A.keypath. Is the correct way to do this to
override the synthesized setter of A like so?
-(void)setA:(id)value
{
A = value
[self setB:A.keypath];
}
Thanks.
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Re: Correct way to overide synthesized setter?
On Feb 28, 2010, at 9:28 AM, Jean-Daniel Dupas wrote:
Le 28 févr. 2010 à 17:23, Chris Tracewell a écrit :
I have two synthesized properties - A and B. Whenever A changes I
need B to be updated to A.keypath. Is the correct way to do this to
override the synthesized setter of A like so?
-(void)setA:(id)value
{
A = value
[self setB:A.keypath];
}
Thanks.
Overriding the setter is fine, but you should read how to do it
properly first:
http://developer.apple.com/mac/library/documentation/cocoa/Conceptual/MemoryMgmt/Articles/mmAccessorMethods.html
-- Jean-Daniel
Thanks Jean - should mentioned I am using
GC.___
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Re: Correct way to overide synthesized setter?
On Feb 28, 2010, at 9:26 AM, Jens Alfke wrote:
On Feb 28, 2010, at 8:23 AM, Chris Tracewell wrote:
I have two synthesized properties - A and B. Whenever A changes I
need B to be updated to A.keypath.
If B's value is entirely dependent upon A, you don't even need to
synthesize it — you can just implement B's getter to return
A.keypath, and declare B as dependent on A:
- (NSString*) b {return A.keypath; }
+ (NSArray*) keyPathsForValuesAffectingB { return [NSArray
arrayWithObject: @a]; }
—Jens
Jens -
keyPathsForValuesAffecting looks like what I am looking for.
Thank you
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NSPredicate Binding Problem
In a window displaying a widget object I am using an outlineview bound to an NSTreeController as master view. When I notice the OV selection change via outlineViewSelectionDidChange I filter a tableview bound to an NSArrayController in one of two ways like so... Method 1 :: use setFilterPredicate on the NSArrayController and set to a new NSPredicate Method 2 :: In IB bind the NSArrayController's Filter Predicate to a property called myPredicate and use KVC to set a new NSPredicate Either of these methods work fine - the tableview's content filters fine. The problem I am having is that when I load a new widget, thus releasing the current widget view from the window, along with it's NSViewController, I get the error... Cannot remove an observer _NSArrayControllerExtensions 0x12c8b30 for the key path... I have googled and found this is typically to do with non KVO compliant models. I have checked and rechecked my models and made sure that all properties are compliant with KVO. While debugging I removed resetting the NSPredicate in outlineViewSelectionDidChange and instead just set it once in awakFromNib and the issue goes away. This brings me to the conclusion that somehow resetting the NSPredicate for the NSArrayController is not allowed. How should I go about filtering my tableview? Should it be okay to reset the NSArrayController's filterPredicate... ie is there something else going on? Thanks in advance for any suggestions. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How Do I Statically Link to libcurl?
On Jun 30, 2009, at 8:55 PM, Nick Zitzmann wrote: On Jun 30, 2009, at 9:49 PM, Chris Tracewell wrote: Finally, just to be sure to be sure to steer things back to my original question... whether I dynamically link or statically link, is there a manual anywhere that describes how to do this in XCode? I'm not sure, but did you try the add - existing frameworks CM item and then navigating to /usr/lib in the resulting open panel (which you can do by pressing Shift-Cmd-G when it's open)? Nick Zitzmann http://www.chronosnet.com/ Okay thanks, that at least helped me find the library - which was step one. There were several version, I choose libcurl.4.dylib. I am not sure where to go now though. I added -libcurl in Other Linker Flags in my build settings and put #import curl.h (a wild stab) in my header file but I still get errors when compiling stating that all of my CURL functions are undeclared. Thank you ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How Do I Statically Link to libcurl?
On Jul 1, 2009, at 2:18 PM, Shawn Erickson wrote: Apple's API contract with application developers is at the library level and not below that. If the SDK you compile against has the libraries you need you should not attempt to statically link them into your application. Additionally any libraries that you do statically link should utilize system provided libraries themselves and not attempt to dive down lower (aka kernel interface, etc.). A statically linked version is not guaranteed to work on a future (or earlier) version of the operating system. Apple takes strong measures to ensure the dynamic libraries they provide will work on each of the operating system they ship on while not breaking compatibility with existing applications. Review the documentation on cross-development on Apple's developer site. http://developer.apple.com/documentation/developertools/Conceptual/cross_development/Introduction/CrossDevelopment.html -Shawn Shawn, Awesome. Thanks a ton for explaining, your post reversed my perspective and rested my fears about taking what really is the easier route. Thanks to all contributers thus far, I have gotten the project to compile without errors. However I am stck with implementation details... I'll start a new thread for that. Thanks Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
libcurl -- how to write a callback?
I've gotten libcurl linked and ready to use thanks to many contributors from a previous post here. Does anyone have a snippet code or link of an example of writing a callback function for say CURLOPT_READFUNCTION? Thank you Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: libcurl -- how to write a callback?
Chris Tracewell wrote: I've gotten libcurl linked and ready to use thanks to many contributors from a previous post here. Does anyone have a snippet code or link of an example of writing a callback function for say CURLOPT_READFUNCTION? What have you tried? For example, I found a number of likely prospects simply by entering CURLOPT_READFUNCTION as a google search term. I narrowed it down by adding the keyword sample or example. libcurl is not unique to Mac OS X, so a reasonable first step should always be to google (or bing, yahoo, whatever) for examples. A reasonable second step would be to add the search term mac os x. -- GG Uhmmm well sometimes the obvious comes to you after someone else makes you feel like an idiot. I googled the *$% out of libcurl, libcurl OS X, libcurl Cocoa example, libcurl Obj-C example So, my apologies for not thinking of using the actual function name, which is where I typically start with NSXyz methods I need help with. Thank you - it all seems so clear now. Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: libcurl -- how to write a callback?
On Jul 1, 2009, at 3:21 PM, Geoff Beier wrote: On Wed, Jul 1, 2009 at 5:42 PM, Chris Tracewellch...@thinkcl.com wrote: I've gotten libcurl linked and ready to use thanks to many contributors from a previous post here. Does anyone have a snippet code or link of an example of writing a callback function for say CURLOPT_READFUNCTION? That question is indubitably more appropriate for the libcurl mailing list: http://curl.haxx.se/mail/list.cgi?list=curl-library Look at the various examples that ship with the libcurl source distribution (I know httpput.c has a simple sample) and if you have any specific question after reading those, it's probably best to ask there. Also, read libcurl-tutorial(3) installed locally on your system. HTH, Geoff Indeed, thanks I'll head over there and thank you for the httpput.c mention. Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSBitMapRepresentation -- JPEG compression?
Marco, Thanks for the exiftool pointer - very nice utility. There is indeed about 2KB of extra Header info in the Apple JPEG - mostly ICC profile info. There is also some subsampling differences as the Apple default is using 4:2:0 and Adobe is using 4:4:4 which may play a factor in quality. I'll need to play with these a bit and see if I can find a common sense method of extracting the unneeded info. It's not a killer but with thousands of page views per day and web users expecting snappy page loads I'll throw a little effort into it. For those interested I here is the header info for the two files as regurgitated from exiftool - please comment if you see anything glaringly obvious that should be considered... //== ADOBE JPEG ==// ExifTool ExifTool Version Number : 7.81 File File Name : 696-0.8-PS.jpg Directory : . File Size : 22 kB File Modification Date/Time : 2009:06:29 15:36:26-07:00 File Type : JPEG MIME Type : image/jpeg Image Width : 305 Image Height: 259 Encoding Process: Baseline DCT, Huffman coding Bits Per Sample : 8 Color Components: 3 Y Cb Cr Sub Sampling: YCbCr4:4:4 (1 1) JFIF JFIF Version: 1.02 Resolution Unit : None X Resolution: 100 Y Resolution: 100 Ducky Quality : 80% Adobe DCT Encode Version : 100 APP14 Flags 0 : [14], Encoded with Blend=1 downsampling APP14 Flags 1 : (none) Color Transform : YCbCr Composite Image Size : 305x259 //== APPLE JPEG ==// ExifTool ExifTool Version Number : 7.81 File File Name : 696-0.8.jpg Directory : . File Size : 28 kB File Modification Date/Time : 2009:06:30 09:23:05-07:00 File Type : JPEG MIME Type : image/jpeg Exif Byte Order : Big-endian (Motorola, MM) Image Width : 305 Image Height: 259 Encoding Process: Baseline DCT, Huffman coding Bits Per Sample : 8 Color Components: 3 Y Cb Cr Sub Sampling: YCbCr4:2:0 (2 2) JFIF JFIF Version: 1.01 Resolution Unit : None X Resolution: 1 Y Resolution: 1 ICC-header Profile CMM Type: appl Profile Version : 2.0.0 Profile Class : Display Device Profile Color Space Data: RGB Profile Connection Space: XYZ Profile Date Time : 2009:05:15 09:32:58 Profile File Signature : acsp Primary Platform: Apple Computer Inc. CMM Flags : Not Embedded, Independent Device Manufacturer : Device Model: Device Attributes : Reflective, Glossy, Positive, Color Rendering Intent: Perceptual Connection Space Illuminant : 0.9642 1 0.82491 Profile Creator : appl Profile ID : d3aacba427aa3e36c6c6c0beb9e6dff7 ICC_Profile Red Matrix Column : 0.35953 0.21156 0.02415 Green Matrix Column : 0.4537 0.70166 0.12245 Blue Matrix Column : 0.15099 0.08719 0.67818 Media White Point : 0.95047 1 1.0891 Chromatic Adaptation: 1.04788 0.02292 -0.0502 0.02957 0.99049 -0.01706 -0.00923 0.01508 0.75165 Red Tone Reproduction Curve : (Binary data 14 bytes, use -b option to extract) Green Tone Reproduction Curve : (Binary data 14 bytes, use -b option to extract) Blue Tone Reproduction Curve: (Binary data 14 bytes, use -b option to extract) Video Card Gamma: (Binary data 1554 bytes, use -b option to extract) Native Display Info : (Binary data 1598 bytes, use -b option to extract) Profile Description : Color LCD Profile Description ML : Color LCD Make And Model : (Binary data 40 bytes, use -b option to extract) Profile Copyright : Copyright Apple, Inc., 2009 ExifIFD Exif Image Width: 305 Exif Image Height : 259 Composite Image Size : 305x259 On Jun 29, 2009, at 11:24 PM, Marco S Hyman wrote: On Jun 29, 2009, at 4:12 PM, Chris Tracewell wrote: The issue is that when using writeToFile my images have an extra 3 to 10 KB of size whether the image is really small or really big - ie 5KB or 300KB
Re: NSBitMapRepresentation -- JPEG compression?
Steven, Thanks for the link very nice info. Rob, Thanks - that is a huge help to get going with file meta data manipulation! ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
How Do I Statically Link to libcurl?
So... call me an idiot, but I am lost as how to get libcurl into my project. I can see libcurl.4.dylib libcurl.3.dylib on my hard drive using spotlight. I have googled and googled and only found bits and pieces here and there but nothing concrete, that is a 1,2,3 instruction on how to link against libcurl. Here is what I think I need to do but am not sure on specifics 1) Statically link against libcurl (3 or 4?) - (in forums everybody says just link against it ... how is this done?) 2) Edit Project Settings -- Build -- Other Linker Flags to some path where libcurl can be found ... which is??? 3) import the curl.h or curl/ease.h into my controller class - (seems straight forward) I have tried a bizillion combos of the above with enough revisions to make me sick. Any help is much appreciated. Thanks Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: How Do I Statically Link to libcurl?
On Jun 30, 2009, at 6:43 PM, Kyle Sluder wrote: dylib means dynamic library... Why do you need to link against libcurl statically? Not saying there aren't valid use cases, but please present yours. I guess I assumed that static linking is prefered as it would include libcurl with the executable and thus ensure that the app would work consistently, even if someone had a different version or had deleted this library from their machine. In short it just seemed like a safe option, but I am un-educated in this regard, so it was my best guess. The deployment environment is fairly easy right now, about 10 machines, mostly 10.5 with Intel iMac and Powerbooks which I can tweak if needed, but in the future this may grow and so you get the picture. If you really need to, you can download the source and compile it into a library yourself. --Kyle Sluder Well, honestly don't know a lot about libcurl and was not aware that I would need to download and compile to be able to statically link, I thought it was like curl and just already on the machine. I have already way over shot my time on this so dynamically linking is fine for now. I was going to use NSTask and curl but saw libcurl and thought it would be more efficient, but I am about to give up on it and go back to curl as I have wasted a half a day trying to link to it. Finally, just to be sure to be sure to steer things back to my original question... whether I dynamically link or statically link, is there a manual anywhere that describes how to do this in XCode? Thanks Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
NSBitMapRepresentation -- JPEG compression?
--- Using GC ---
I am saving images to file from an NSImage dropped into an NSImageView
using JPEG as the file format via the code below.
-(IBAction)saveImages:(id)sender
{
TKProduct *theProduct = [[myProductArrayController selectedObjects]
objectAtIndex:0];
NSBitmapImageRep *theBitMapImageRep = [NSBitmapImageRep
imageRepWithData:[[theProduct myImage] TIFFRepresentation]];
NSDictionary *thePropertyDictionary = [NSDictionary
dictionaryWithObjectsAndKeys:[theProduct
myImageCompression],NSImageCompressionFactor,[NSNumber
numberWithInteger:0],NSImageProgressive,nil];
NSString *theFileName = [NSString stringWithFormat:@%...@-%@.jpg,
[theProduct myID],[theProduct myImageCompression]];
NSData *theData = [theBitMapImageRep representationUsingType:
NSJPEGFileType properties: thePropertyDictionary];
[theData writeToFile:[@/volumes/MyHardDrive/Users/myname/Desktop/
XCode-Image-Tests/ stringByAppendingString:theFileName]
atomically:YES];
}
Ideally I am wanting to achieve quality and file size comparable with
what I get out of Photoshop's File-Save For Web command. I am
satisfied with the comparative quality of matching settings I get -
that is an image saved from PS at JPEG quality 50 and non progressive
is close enough (although not quite as good) as what I get from the
same image run through the method above using NSImageCompressionFactor
of 0.5. The issue is that when using writeToFile my images have an
extra 3 to 10 KB of size whether the image is really small or really
big - ie 5KB or 300KB. I am suspecting that my XCode generated images
are bigger for one of two reasons...
1) Adobe's JPEG compression is just plain better and unless I develop
my own JPEG compression algorithm I am hosed.
2) My Objective-C created images contain extra file meta data /
headers that are inflating the size a bit
I mention scenario 2 because a few versions back, before Save For
Web was in PS, you could uncheck an option for Include Extra File
Headers (or something like that) when saving to JPEG and your files
would always shrink by a few KB. The file size is important because
the images will load on a a busy web site up to a hundred per page
load and so 100 4KB image thumbnails loads a lot quicker than 100 8KB
thumbnails. I have always used ImageReady and AppleScript to process
these files in the past but want to skip that and do it solely in my
App.
Does anyone have any suggestions as to how to squeeze a little more
file size reduction out of these JPEG's without having to dive into
JPEG compression algorithms (probably over my head, but willing to
look if you want to point in a direction :-) ? I guess I am hoping
there is something I have missed in NSData and writeToFile that allows
me to not include custom OS X meta data / headers / Icons.
I should also mention that if you have any pointers for PNG
optimization, tutorials, tech docs, I would love the links as PNG is a
format I would like to use down the road as well and the docs and
Google didn't provide anything about how to actually produce a reduced
color pallete (I know its probably right in front of me, please feel
free to point out the obvious :-)
Thank you.
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Re: Enter Key Behavior in NSTableView
raleigh, I am not overriding textShouldEndEditing, but your suggestion did lead me to find that my File's Owner's superclass is implementing: -(BOOL)control:(NSControl*)control textView:(NSTextView*)textView doCommandBySelector:(SEL)commandSelector In there I had an if statement that was catching the insertNewLine: selector for every control in the view when I only intended it for some textFields. Thanks for the help - it is working now. Chris On Jun 18, 2009, at 5:22 PM, Raleigh Ledet wrote: I don't think this is normal. When a field editor is up, the Return should go to the Field Editor's keyDown: method, not TV. (for both cases) Is your File's Owner overriding textShouldEndEditing:? and preventing the Field Editor from ending? -raleigh On Jun 17, 2009, at 4:03 PM, Chris Tracewell wrote: I have a subclass of NSTableView which I have implemented keyDown to pick up delete and enter key presses. When the TV is bound to an array controller it works perfectly, I can detect keyDowns for the above mentioned and as a bonus when the user presses Enter or Return the field editor ends editing. Thats what I want. The problem is that as soon as I hook up my File's Owner as the delegate for the TV the Field Editor no longer detects the Return and Enter key strokes. Is this normal? If so where do I look in docs to re-establish this behavior? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/ledet%40apple.com This email sent to le...@apple.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Enter Key Behavior in NSTableView
I have a subclass of NSTableView which I have implemented keyDown to pick up delete and enter key presses. When the TV is bound to an array controller it works perfectly, I can detect keyDowns for the above mentioned and as a bonus when the user presses Enter or Return the field editor ends editing. Thats what I want. The problem is that as soon as I hook up my File's Owner as the delegate for the TV the Field Editor no longer detects the Return and Enter key strokes. Is this normal? If so where do I look in docs to re- establish this behavior? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Correct MVC code placement
Thanks Kyle, I should've noted this is a non-document based app. That said, I think your suggestion would imply to let the controller to expose its own array property of the model's pipe-separated property? Chris On Jun 14, 2009, at 11:27 AM, Kyle Sluder wrote: NSDocument is what's known as a model-controller object. Your actual model is the pipe-separated values; NSDocument allows you to perform operations on that model. As such, I'd probably expose an NSArray property for my list of things, and only do the pipe-separation when reading from or writing to disk. --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Correct MVC code placement
Ken, Okay, that makes perfect sense. You are right, I was storing the pipe- separated string of values to avoid needing another DB table for single values that would not surpass more than 2 or 3 per record. However, your and Kyle's response now make it obvious that the pipe- string is not the natural/logical format for cocoa use, and should be a part of the model. Chris On Jun 14, 2009, at 3:08 PM, Ken Thomases wrote: I think what Kyle meant is that your model is the values between the pipe separators. The pipe-separated string format is part of your file format. I don't know what your model represents, but I doubt that the pipe-separated string format is inherent to the thing which it represents. Rather, it seems like the sort of thing which is only part of the storage format. So, I think the model itself should parse the storage format and expose its state in the more natural format for Cocoa -- an array property. Cheers, Ken ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Why is my object getting set two times?
While debugging I noticed that a custom object's set method is being invoked twice. I have theViewController that is the files owner of my Nib. theViewController has a myObject property. myObject is bound in the Nib using an NSObjectController to the file's owner's myObject property. Automatically prepares content is unchecked in IB. In theViewController I override setMyObject to do some prep work, I also call [super setMyObject:sender] first as that is where the myObject property is defined. When I load the window and thus the view everything works fine but all of the methods I perform in setMyObject show up twice when I log them. I have been trying to track down where I might be sending setMyObject twice, but am baffled. Here is the log output 2009-05-12 08:50:23.229 myApp[21135:10b] SVController BEFORE adding DetailController view to SV 2009-05-12 08:50:23.281 myApp[21135:10b] SENDER = TKProductGroup: 0x12d7a50 2009-05-12 08:50:23.283 myApp[21135:10b] myIDAttributeSet = (null) :: (null) 2009-05-12 08:50:23.322 myApp[21135:10b] SVController AFTER adding DetailController view to SV 2009-05-12 08:50:23.324 myApp[21135:10b] SENDER = TKProductGroup: 0x10afed0 2009-05-12 08:50:23.324 myApp[21135:10b] myIDAttributeSet = (null) :: (null) I know this question is pretty difficult to answer without seeing all of the code, but wanted to ask in case this is a normal bindings issue and nothing to worry about OR if it is a sign of something serious screwed up in my code and thus needing further attention. Thanks Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
NSButtonCell visibility binding in NSOutlineView
I am looking for the best method of turning off the visibility of an NSButtonCell object for individual rows in an OutlineView/TableView. I have an OutlineView that is bound to a TreeController. There are two columns. In the last column I am using a checkbox cell that should only be visible to the user when a representedObject in the TreeController has a certain property value. There is no Visibility binding only Enabled which does not hide the control but just dims it. I am using bindings to return a custom image for setImage and setAlternateImage to display a custom NSImage instead of the regular checkbox. It works nicely. I tried using conditional logic to return a transparent image when I want to hide the control but that affects the entire column. If I need to subclass I am suspecting I need to override NSTableColumn's dataCellForRow, but then how do I obtain the representedObject for that row? Thanks for any help ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSButtonCell visibility binding in NSOutlineView [SOLVED]
Kyle,
Thanks for the reply. Yes I know and agree on the issue of the
usability. I struggled with this but ultimately felt it was essential
as other options disassociated the property from the object too much
or made it appear that a given object could indeed have the property
enabled.
What I made work, and feels like the best solution is to use was a OV
delegate I had missed. It's nice as it requires no custom drawing and
allows me to inspect the object. It took one IBOutlet to bind to the
column I wanted to modify.
-(NSCell *)outlineView:(NSOutlineView *)outlineView
dataCellForTableColumn:(NSTableColumn *)tableColumn item:(id)item
{
if (tableColumn == myAttributeColumn !item representedObject]
representedObject] myType] isEqualToString:@style])
{
return [NSTextFieldCell new];
}
return [tableColumn dataCellForRow:item];
}
Chris
On Apr 29, 2009, at 12:04 AM, Kyle Sluder wrote:
On Tue, Apr 28, 2009 at 1:12 PM, Chris Tracewell ch...@thinkcl.com
wrote:
I am looking for the best method of turning off the visibility of an
NSButtonCell object for individual rows in an OutlineView/
TableView. I have
an OutlineView that is bound to a TreeController. There are two
columns. In
the last column I am using a checkbox cell that should only be
visible to
the user when a representedObject in the TreeController has a certain
property value. There is no Visibility binding only Enabled which
does not
hide the control but just dims it.
Hm. I'm conflicted as to whether or not from a usability standpoint
you should prefer to display a disabled cell or none at all.
NSTableView has a -tableView:dataCellForTableColumn:row: delegate
method, so you don't need to subclass NSTableColumn. Perhaps the
better approach is to subclass NSButtonCell and implement
-drawWithFrame:inView: somewhat like this:
-(void)drawWithFrame:(NSRect)frame inView:(NSView *)view {
if([self shouldDisplayCheckboxForObject:[self objectValue]])
[super drawWithFrame:frame inView:view];
}
Then, of course, you need to implement
-shouldDisplayCheckboxForObject, set an instance of this cell as the
cell for your table column, and bind the column to your model objects
instead of an attribute thereof.
--Kyle Sluder
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Re: NSButtonCell visibility binding in NSOutlineView
On Apr 29, 2009, at 8:13 AM, Ashley Clark wrote: On Apr 28, 2009, at 12:12 PM, Chris Tracewell wrote: I am looking for the best method of turning off the visibility of an NSButtonCell object for individual rows in an OutlineView/ TableView. I have an OutlineView that is bound to a TreeController. There are two columns. In the last column I am using a checkbox cell that should only be visible to the user when a representedObject in the TreeController has a certain property value. There is no Visibility binding only Enabled which does not hide the control but just dims it. I am using bindings to return a custom image for setImage and setAlternateImage to display a custom NSImage instead of the regular checkbox. It works nicely. I tried using conditional logic to return a transparent image when I want to hide the control but that affects the entire column. If I need to subclass I am suspecting I need to override NSTableColumn's dataCellForRow, but then how do I obtain the representedObject for that row? Why not just implement - outlineView:willDisplayCell:forTableColumn:item: on your delegate and then set your images there depending on what item is about to be displayed? Ashley I tried that by setting the image but I need 3 states for the checkbox - OFF, ON, HIDDEN. Whenever I set a certain row to a HIDDEN image to hide that row it would affect the image for all other items too. So it looked like I would need to subclass, however I found the solution and just posted about it before your email came in... -(NSCell *)outlineView:(NSOutlineView *)outlineView dataCellForTableColumn:(NSTableColumn *)tableColumn item:(id)item Thanks Chris ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSButtonCell visibility binding in NSOutlineView
On Apr 29, 2009, at 10:59 AM, Ashley Clark wrote:
On Apr 29, 2009, at 11:46 AM, Chris Tracewell wrote:
On Apr 29, 2009, at 8:13 AM, Ashley Clark wrote:
On Apr 28, 2009, at 12:12 PM, Chris Tracewell wrote:
I am looking for the best method of turning off the visibility of
an NSButtonCell object for individual rows in an OutlineView/
TableView. I have an OutlineView that is bound to a
TreeController. There are two columns. In the last column I am
using a checkbox cell that should only be visible to the user
when a representedObject in the TreeController has a certain
property value. There is no Visibility binding only Enabled which
does not hide the control but just dims it.
I am using bindings to return a custom image for setImage and
setAlternateImage to display a custom NSImage instead of the
regular checkbox. It works nicely. I tried using conditional
logic to return a transparent image when I want to hide the
control but that affects the entire column. If I need to subclass
I am suspecting I need to override NSTableColumn's
dataCellForRow, but then how do I obtain the representedObject
for that row?
Why not just implement -
outlineView:willDisplayCell:forTableColumn:item: on your delegate
and then set your images there depending on what item is about to
be displayed?
I tried that by setting the image but I need 3 states for the
checkbox - OFF, ON, HIDDEN. Whenever I set a certain row to a
HIDDEN image to hide that row it would affect the image for all
other items too. So it looked like I would need to subclass,
however I found the solution and just posted about it before your
email came in...
-(NSCell *)outlineView:(NSOutlineView *)outlineView
dataCellForTableColumn:(NSTableColumn *)tableColumn item:(id)item
When using willDisplayCell you have to set the image for all rows to
whatever the image should be for that row.
Something along the lines of:
if (rowShouldBeHidden) {
[cell setImage:nil];
[cell setAlternateImage:nil];
}
else {
[cell setImage:normalImage];
[cell setAlternateImage:alternateImage];
}
Ashley
Ashley,
Thank you - that worked. I thought I had tried something similar but I
obviously had it wrong. Here is a screen shot for reference if anyone
cares to see the window in final state and has any comments.
http://www.thinkcl.com/images/screengrab.png
Chris
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