Re: NSPredicateEditor Continuous updating failes
On Thu, Jan 21, 2010 at 6:00 AM, Florian Soenens florian.soen...@nss.be wrote: Hi LIst, i set up an NSPredicateEditor and got it all working fine except that it only executes when i hit enter or tab out of the NSTextField. Is there a way to let it execute everytime something changes in the textfield? I tried checking the continuous button in IB but that is impossible, it always unchecks itself. I also tried setting continuous programatically but to no avail... Anyone has any suggestions? Kind regards, Florian. Add an observer for notifications of NSControlTextDidChangeNotification. When the predicate editor updates a text field, it'll send this notification with itself as the object value. -- Jim http://nukethemfromorbit.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
NSServices error parameter ignored?
I've created and am successfully calling a service in my application.
But when an error is encountered and I set an error string, it doesn't
seem to go anywhere. The docs say its supposed to be logged to the
console but I see nothing. Is this a bug or am I missing something? My
code:
-(void) myCoolService:(NSPasteboard *)pboard userData:(NSString *)data
error:(NSString **)error
{
if( pboard contains cool things )
{
doing cool things
}
else
{
if( error )
*error = [NSString stringWithString:@This error never shows];
}
}
Thanks
--
Jim
http://nukethemfromorbit.com
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Re: NSServices error parameter ignored?
On Mon, Jan 18, 2010 at 11:38 AM, Greg Parker gpar...@apple.com wrote: On Jan 18, 2010, at 8:52 AM, Jim Turner wrote: I've created and am successfully calling a service in my application. But when an error is encountered and I set an error string, it doesn't seem to go anywhere. The docs say its supposed to be logged to the console but I see nothing. Is this a bug or am I missing something? Looks like a bug. I think there's a miscommunication between AppKit and CF that drops the error after your service is called. You should file a bug report. -- Greg Parker gpar...@apple.com Runtime Wrangler Thanks for the reply, Greg. I've filed a bug rdar://problem/7551989 -- Jim http://nukethemfromorbit.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: A password strength checker
Code is available at: http://code.google.com/p/nukethemfromorbit/source/browse/#svn/trunk/PasswordStrength It's just the method for determining the strength, any UI accouterments is an exercise left up to the reader... although I'll probably make my stuff available once I have it cleaned up. If anyone has suggestions for improvement of the algorithm, please let me know. Jim On Mon, Jan 11, 2010 at 10:05 PM, Howard Siegel hsie...@gmail.com wrote: If you would, please post your code some place and let us know the URL to it. There is supposed to be an iPhone version coming out, but I suspect that it will be done using MonoDevelop (C#.NET for non-Windows platforms) rather than being written in ObjC/Cocoa. - h On Mon, Jan 11, 2010 at 08:12, Jim Turner jturner.li...@gmail.com wrote: Awesome find, Howard. I've needed a password strength algorithm in the past and never could find one. Plus, the strength computed by the Password Assistant is questionable at best. Given a password of '' (20 lowercase 'a'), the assistant scores it about a 20%. Add one more 'a' though and it jumps to 80%. I'm not sure how that one extra 'a' is worth a 60% increase in strength. I'd be nice if their implementation was a bit more open for examination. The algorithm used by KeePass, however, scores both a 20-character 'a' and 21-character 'a' password as 10 (with 0 being no password or a worthless password). Seems more accurate. If anyone's interested in it, I wrote a Cocoa version of their implementation. I'd be happy to make it available. Jim On Thu, Jan 7, 2010 at 2:32 PM, Howard Siegel hsie...@gmail.com wrote: Have a look at the source code for KeePass Password Safe ( http://keepass.info/). It has a password generator and strength computation. Version 1.x is written in C++ for MS Windows (using MFC). Version 2.x is a rewrite in C# for .NET. It has been ported as KeyPassX for Mac OS X and Linux. - h On Thu, Jan 7, 2010 at 11:51, Martin Hewitson martin.hewit...@aei.mpg.dewrote: Dear list, Is anybody aware of a reasonable algorithm or some code that can be used to test/check the strength of a password? I'd like to give a kind of score or a color (red,yellow,green). I've looked at cracklib, but that doesn't give a score, really. Best wishes, Martin Martin Hewitson Albert-Einstein-Institut Max-Planck-Institut fuer Gravitationsphysik und Universitaet Hannover Callinstr. 38, 30167 Hannover, Germany Tel: +49-511-762-17121, Fax: +49-511-762-5861 E-Mail: martin.hewit...@aei.mpg.de WWW: http://www.aei.mpg.de/~hewitson http://www.aei.mpg.de/%7Ehewitson ___ 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/hsiegel%40gmail.com This email sent to hsie...@gmail.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/jturner.lists%40gmail.com This email sent to jturner.li...@gmail.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: A password strength checker
Awesome find, Howard. I've needed a password strength algorithm in the past and never could find one. Plus, the strength computed by the Password Assistant is questionable at best. Given a password of '' (20 lowercase 'a'), the assistant scores it about a 20%. Add one more 'a' though and it jumps to 80%. I'm not sure how that one extra 'a' is worth a 60% increase in strength. I'd be nice if their implementation was a bit more open for examination. The algorithm used by KeePass, however, scores both a 20-character 'a' and 21-character 'a' password as 10 (with 0 being no password or a worthless password). Seems more accurate. If anyone's interested in it, I wrote a Cocoa version of their implementation. I'd be happy to make it available. Jim On Thu, Jan 7, 2010 at 2:32 PM, Howard Siegel hsie...@gmail.com wrote: Have a look at the source code for KeePass Password Safe ( http://keepass.info/). It has a password generator and strength computation. Version 1.x is written in C++ for MS Windows (using MFC). Version 2.x is a rewrite in C# for .NET. It has been ported as KeyPassX for Mac OS X and Linux. - h On Thu, Jan 7, 2010 at 11:51, Martin Hewitson martin.hewit...@aei.mpg.dewrote: Dear list, Is anybody aware of a reasonable algorithm or some code that can be used to test/check the strength of a password? I'd like to give a kind of score or a color (red,yellow,green). I've looked at cracklib, but that doesn't give a score, really. Best wishes, Martin Martin Hewitson Albert-Einstein-Institut Max-Planck-Institut fuer Gravitationsphysik und Universitaet Hannover Callinstr. 38, 30167 Hannover, Germany Tel: +49-511-762-17121, Fax: +49-511-762-5861 E-Mail: martin.hewit...@aei.mpg.de WWW: http://www.aei.mpg.de/~hewitson http://www.aei.mpg.de/%7Ehewitson ___ 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/hsiegel%40gmail.com This email sent to hsie...@gmail.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/jturner.lists%40gmail.com This email sent to jturner.li...@gmail.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSPredicate like NSLiteralSearch
I believe you need the diacritic insensitive option:
'someProperty BEGINSWITH[d] ?'
Look up NSComparisonPredicate options in the documentation for more
discussion. As for what the 'w' means, it's Spotlight specific. The
Comparison is word based, and also detects transitions from lower-case
to upper-case.
http://developer.apple.com/Mac/library/documentation/Carbon/Conceptual/SpotlightQuery/Concepts/QueryFormat.html
--
Jim
http://nukethemfromorbit.com
On Tue, Dec 15, 2009 at 1:30 AM, Gerriet M. Denkmann
gerr...@mdenkmann.de wrote:
This works. i.e. returns {0,1}:
NSRange r2 = [ @??? rangeOfString: @? options: NSAnchoredSearch |
NSLiteralSearch ];
(without NSLiteralSearch it returns NSNotFound).
but an NSPredicate with: someProperty BEGINSWITH ? does NOT find ???.
(the NSPredicate is to be used with -[NSArrayController setFilterPredicate:]
to query Core Data).
So: is there some string_option equivalent to NSLiteralSearch?
And a related question: where are the available string_options defined?
The Predicate Programming Guide has:
string_options ::= c | d | cd
but also an example with w:
((* = FooBar*wcd)) || (kMDItemTextContent = FooBar*cd))
10.6.2
Kind regards,
Gerriet.
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Re: NSPredicateEditorRowTemplate and dynamic popups
Try this:
Create an outlet to your row template. When you need to update the
popups, make a copy of that template. Make a copy of the rowTemplates
the predicate editor currently tracks and iterate over them replacing
the template in the list that is the same class as your custom
template. Then set this new list of templates back onto the predicate
editor.
The net effect is that the predicate editor will rebuild all the
templates it's currently using which gives you a chance to update the
popups as needed. I don't know what'll happen when the popup
transitions to/from the text field... there's little you can do with
that as its an optimization the predicate editor does when building
it's templates (if there's only one option, why offer a choice?)
cheap-n-dirty code sample
-(void) updateTemplates {
MyRowTemplate *_newTemplate = [[myRowTemplateOutlet copy] autorelease];
NSMutableArray *rowTemplates = [[[predicateEditor rowTemplates]
mutableCopy] autorelease];
NSInteger ctr;
for( ctr=0; ctr[rowTemplates count]; ctr++ ) {
if( [[rowTemplates objectAtIndex:ctr]
isKindOfClass:[MyRowTemplate class]] ) {
[rowTemplates replaceObjectAtIndex:ctr
withObject:_newTemplate];
break;
}
}
[predicateEditor setRowTemplates:rowTemplates];
}
--
Jim
http://nukethemfromorbit.com
On Fri, Nov 13, 2009 at 10:48 AM, Dave DeLong davedel...@me.com wrote:
Hi everyone,
I have an NSPredicateEditor, with some standard row templates. I'd like to
add a custom row template with three views: a popup button (indicating the
attributes this template references), a second popup button (with the
operators), and a third popup button that's populated with a list of possible
values.
This is very similar to a regular row template, except that the list of
possible values is computed at runtime and can change periodically based on
system events.
I've tried subclassing NSPredicateEditorRowTemplate, overriding
-templateViews, and returning my 3 popup buttons (all properly populated).
This works once, but after the row is created, I haven't been able to figure
out how to repopulate the popup button when the list of possible values
changes. I've tried setting the popup button's menu's delegate to an object
that will repopulate it, but the delegate methods are never called.
I've also seen that when there's only one possible value, my popup button is
replaced with a textfield. I suppose that's OK, except that if the list of
possible values changes, I need that textfield to change to a popup button.
How can I achieve my dynamic popup button in an NSPredicateEditorRowTemplate?
Thanks!
Dave DeLong
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Re: NSCollectionView issues
10.5's collection view is, safe to say, kind of a train wreck. I've had to work around quite a few things. Your problem is solvable by asking the NSCollectionViewItem created for your new table element for its view and to have that view scrollRectToVisible: for its bounds. If you need to get the ViewItem for a specific index (available via NSCollectionView's itemAtIndex: under 10.6), you'll need to go into slightly undocumented land and look at the collection view's _targetItems ivar. It contains the list of NSCollectionViewItems currently displayed in the collection view. Make sure you conditionalize this for 10.6 as _targetItems isn't there anymore. Hope that helps -- Jim http://nukethemfromorbit.com On Fri, Oct 16, 2009 at 9:32 AM, Half Activist halfactiv...@gmail.com wrote: Hi, I'm using a NSCollectionView to display a stack of items (a table) but since what's display is far too complex to be laid out programmatically I went for the NSCollectionView. And it's been all problems from the beginning. First of all with setContent that never worked no matter what I did...it only works if I bind the content to an nsarraycontroller. Now, when I add a new item in this table i want to be able to scroll it to the displayed area of the view, but the frameForItemAtIndex: method only appeared in 10.6, so I decided to use the subviews and get the frame this way, and now what did I discover: Suppose I have N items and therefore N subviews in the NSCollectionView, after changing the array that now contains N + 1 items, the nscollectionview has after the update N + N + 1 subviews! So, accessing subviews is not an option either. If anyone knows how to do fix these bugs, and how to disable the animation, i'd be really glad. I'm considering writing an homebrew nscollectionview. regards. ___ 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/jturner.lists%40gmail.com This email sent to jturner.li...@gmail.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Application main menu title behavior change in 10.6
On Fri, Sep 4, 2009 at 9:03 PM, Peter Ammonpam...@apple.com wrote: Hi Jim, First let me thank you for checking the release notes. However, that particular issue is unrelated, confusingly enough. Here's what's going on. The first menu item in the main menu (or more precisely, its submenu) is magic, in that when it becomes the first item, its title is ignored and instead the application name is used. This is why you do not have to update your MainMenu.nib every time you change your application name. In Leopard, there was a bug that caused this to be applied inconsistently. It sounds like your application was benefiting from this bug. You can change the title of the application menu, after you set the main menu, like so: NSApp mainMenu] itemAtIndex:0] submenu] setTitle:@New Title] Hope this helps, -Peter Indeed it does help, Peter. I now see why I was so confused with the behavior I was encountering when I tried setTitle: initially. setTitle: does its business only if the new title is different than the current title. We are building a new main menu with the new application's name already in place. Doing the following sets the menu's title correctly when the title is already set to New Title: NSApp mainMenu] itemAtIndex:0] submenu] setTitle:@] NSApp mainMenu] itemAtIndex:0] submenu] setTitle:@New Title] Always appreciative of the help, Peter. Thanks! -- Jim ___ 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
Application main menu title behavior change in 10.6
Hi all, I have an application (QuicKeys) that allows the user to define menu selection as an action. In our latest version and under Leopard, we present UI that replaces the main menu bar of our app with the menu bar of the target app (via setMainMenu:) so that we can correctly retrieve which menu item the user selected. Works like a champ, even under Snow Leopard, save for one problem. Under 10.6, the application name is always QuicKeys, not Finder or whatever the target application name would be. This is causing confusion with our users as while the menu is really the target app's menu, it has the wrong application name. Reading through the release notes for AppKit on 10.6, I found that there's been a change to how the main menu bar displays the application's name. Specifically, under the NSApplication application menu item title header, it states ... the application menu always reflects the application name. This appears to be what's causing the issue and I'm curious if anyone knows of a work-around? Thanks Jim ___ 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
NSFileManager's copyItemAtPath:toPath:error: syslogging every directory it finds?
Hopefully this has a simple answer but it seems now that when I call copyItemAtPath:toPath:error: to copy a folder to another location, I get this in the console: 6/1/09 3:48:28 PM /Users/jimt/Source/MyApp/trunk/build/Debug/MyApp.app/Contents/MacOS/MyApp[29625] reading from /Users/jimt/Library/MyApp/MyFolder: Is a directory I had to break on syslog() to see who was even causing this to happen. I'm not sure what's changed or if I've set some magic flag someplace that's finding its way into the internals of copyItemAtPath:toPath:error: but does anyone know why I'd be getting that logged? Very confusing. -- Jim http://nukethemfromorbit.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Renaming a file repositions icon in Finder
On Fri, May 8, 2009 at 5:45 PM, Sean McBride s...@rogue-research.com wrote: On 5/8/09 2:52 PM, Jim Turner said: It appears that renaming a file will cause the Finder to reposition the icon for the file if it's currently displayed in a icon view somewhere. Is there any way to prevent that from happening? It looks very strange to have icons jump all over the place just because of a rename. Thinking that it might have been the method with which I was renaming the file, I tried NSFileManager's moveItemAtPath:toPath:error:, rename(), and FSRenameUnicode() and all three exhibit the same problem. Many apps exibit this problem and it has driven me and others nuts for years. Do file a(nother) bug. -- Sean McBride, B. Eng s...@rogue-research.com Rogue Research www.rogue-research.com Mac Software Developer Montréal, Québec, Canada If anyone would like to me-too my me-too, it's rdar://problem/6874498 -- Jim http://nukethemfromorbit.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
Renaming a file repositions icon in Finder
It appears that renaming a file will cause the Finder to reposition the icon for the file if it's currently displayed in a icon view somewhere. Is there any way to prevent that from happening? It looks very strange to have icons jump all over the place just because of a rename. Thinking that it might have been the method with which I was renaming the file, I tried NSFileManager's moveItemAtPath:toPath:error:, rename(), and FSRenameUnicode() and all three exhibit the same problem. -- Jim http://nukethemfromorbit.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: filteredArrayUsingPredicate and points
On Wed, Apr 15, 2009 at 9:05 AM, Alexey Baev b...@belightsoft.com wrote: Hi. I have class MyDot. This class has function: - (BOOL) containsPoint: (NSPoint) pt; I have also NSArray, which contains several MyDot objects: NSArray* dots; I want to get new array NSArray* newDots which contains MyDot objects and for these dots containsPoint:(NSPoint)pt = YES. How can I do that? I would like to write something like that: NSPoint checkedPoint = NSMakePoint(100, 100); NSPredicate* predicate = [NSPredicate predicateWithFormat: @containsPoint %p == YES , checkedPoint]; //i don't know what to write here NSArray* newDots = [dots filteredArrayUsingPredicate: predicate]; I would be glad if you helped me. -- Alexey Baev Alexey, It's quite possible, although it takes a bit more that a simple predicateWithFormat: can do. You'll need to use NSExpression's expressionForFunction:selectorName:arguments: along with a NSComparisonPredicate. Your MyDot class will also need a method that's able to accept a NSValue object (containing a NSPoint) and return an NSNumber. Something like... -(NSNumber *) containsThisPoint: (NSValue *) aPoint; So to filter your array: NSArray *myArrayOfObjects = ... NSPoint tgtPoint = ... NSExpression *functionExp = [NSExpression expressionForFunction:[NSExpression expressionForEvaluatedObject] selectorName:@containsThisPoint: arguments:[NSArray arrayWithObject:[NSExpression expressionForConstantValue:[NSValue valueWithPoint:tgtPoint; NSPredicate *searchPredicate = [NSComparisonPredicate predicateWithLeftExpression:functionExp rightExpression:[NSExpression expressionForConstantValue:[NSNumber numberWithBool:YES]] modifier:NSDirectPredicateModifier type:NSEqualToPredicateOperatorType options:0]; NSArray *newArray = [myArrayOfObjects filteredArrayUsingPredicate:searchPredicate]; -- Jim http://nukethemfromorbit.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Anyone using IKImageView/any alternatives ?
I'm using IKImageView in an app and while it's far from being a fully-featured control, it can do some things ok. If all you need to do is pan and zoom, IKImageView will work just fine. It's when you get into more advanced things like rotation and saving changes where the implementation falls apart. Stay in the shallow end of the pool and you'll be fine. If you ever plan on needing more than just pan and zoom, you'll be better off looking somewhere else or just rolling your own from the start. Jim On Thu, Feb 5, 2009 at 4:13 AM, Christian Graus christian.gr...@gmail.com wrote: I am googling for example of IKImageView, and all I am finding is posts like this one: http://espresso-served-here.com/category/scribbler/ In short, lots of people are reporting that IKImageView plain does not work as advertised. Does anyone have any positive experience with this control ? All I need to do is zoom and pan an image, does the NSImageView support that, or is there somewhere else I should be looking ? Thanks as always Christian ___ 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/jturner.lists%40gmail.com This email sent to jturner.li...@gmail.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSPredicateEditorRowTemplate for NSDate
The miracle is over. The out-of-the-box templates in IB only provide three-view templates (left expression, operator, right expression). You'll need to subclass NSPredicateEditorRowTemplate and provide the views and logic you want to use in your template. I did a presentation for the local CocoaHeads a while back on NSPredicateEditor and my sample code does show a basic Date is within N days/weeks/months/years if you'd like a starting point. Go to http://groups.google.com/group/des-moines-cocoaheads/files and look for NSPredicateEditor.zip (I'd direct link but the URL is a monster). -- Jim http://nukethemfromorbit.com On Mon, Jan 19, 2009 at 2:13 PM, Vitaly Ovchinnikov vitaly.ovchinni...@gmail.com wrote: Hey, boys and girls? Am I the first, who use NSPredicateEditor? I just found that there is no default template for time values... Please somebody confirm that miracle is over and I need to code all this data/time stuff myself :( On Sun, Jan 18, 2009 at 7:22 PM, Vitaly Ovchinnikov vitaly.ovchinni...@gmail.com wrote: Hello list, When I add a row template that edits date to predicate editor, it allows to perform simple comparisons. Like less or greater or equal etc. Smart folders in Finder allow to add clauses like Date is within last X weeks. I can't find a simple way to do the same. It seems that the only way is to use custom view with that implements what I want, but want to make sure that it is correct before I start. Maybe I missed something? Or maybe some standard implementation already exists? I googled the Internet and this list - nothing. Any ideas? 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/jturner.lists%40gmail.com This email sent to jturner.li...@gmail.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
Accessing NSKeyedArchiver's archivedDataWithRootObject by name
I have a situation where I'm archiving an array of objects via NSKeyedArchiver's archivedDataWithRootObject: and later needing to set a delegate on the NSKeyedUnarchiver that decodes it. The documentation is a bit unclear on how one starts the unarchive process when a NSKeyedUnarchiver is created on an archive where you don't know, for certain, the keys it contains. So my question... is this legitimate? NSKeyedUnarchiver *_keyedUnarchiver = [[[NSKeyedUnarchiver alloc] initForReadingWithData:archivedData] autorelease]; [_keyedUnarchiver setDelegate:self]; NSMutableArray *archivedArray = [_keyedUnarchiver decodeObjectForKey:@root]; [_keyedUnarchiver finishDecoding]; It works, but I always question things when I hard-code a string for something. Will 'root' always be the key that represents the root object? If I could do something like [NSKeyedUnarchiver unarchiveObjectWithData:delegate:], that would be better than perfect. -- Jim http://nukethemfromorbit.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 [EMAIL PROTECTED]
IKImageView and delegate callback/notification of image changes
Hi list. Attempting to use IKImageView to implement a really basic image editor in my app and I've come across what appears to be a pretty odd omission: IKImageView never tells you when the image has been edited and needs saved. While the object supports a delegate, there's no documentation on whether it actually implements anything that would tell me when something changed. Has anyone come across a solution for knowing when the image has been edited? Thanks -- Jim http://nukethemfromorbit.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 [EMAIL PROTECTED]
Re: How to develop a Safari event listener
Hi Bill Unless things have changed recently, what you're looking for is called Not Officially Supported by Safari. As you discovered, there is no interface that will allow a plugin to load arbitrarily unless it's going to provide some sort of media handler for content on the page. That being said, the WebKit plugin API *can* do what you want, but it's a bit ugly at best and utilizes a loophole in how plugins can externally define their MIME types to get the plugin to load. If you search Google for Safari and browser with plugins, you'll find some guidance. Finally, if you're completely open to all options, things like SIMBL or Unsanity's Application Enhancer may be an option... but input managers can get people's feathers ruffled. Plus, there could be a large discussion on whether input managers will be around much longer at all (which I won't start here). In short, use them at your own risk. -- Jim http://nukethemfromorbit.com On Sun, Sep 28, 2008 at 8:43 PM, Bill Morgan [EMAIL PROTECTED] wrote: Hi to all, I am trying to develop a small tool, it can be an appliction/bundle/plug-in ... The goal is, when Safari opens certain web page, like www.apple.com, the tool will be launched automatically, and it can get the page's url. I know for firefox, people call this kind of tool as add-on, not sure what it's exactly called for Safari. I tried to do it with Web Kit plug-in. But as I learned, Web Kit plug-in only works when the web page has certain embed tag, like 'mov', that was defined in the MIME type that the plug-in registered for. But in my case, I want the tool to work for any web page Safari opened. Any one has any suggestion on how to do this? thank you all for your kind support! Bill ___ 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/jturner.lists%40gmail.com This email sent to [EMAIL PROTECTED] ___ 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 [EMAIL PROTECTED]
Re: Core Data Form
Jon,
First off, unless you're doing something special you don't need to
create custom classes for each entity. If your managed object really
is just slinging strings, leave the class as NSManagedObject and
create a new entity with:
NSManagedObject *hostObj = [NSEntityDescription
insertNewObjectForEntityForName:@Host inManagedObjectContext:[[NSApp
delegate] managedObjectContext]];
then set the values on that object with:
[hostObj setValue: hostString forKey:@hostStringKey];
etc...
Second, your +(id)addHostFromPanel: method is a class method yet
you're asking for [self managedObjectContext], which is an instance
method. Basically, you don't have a properly initialized managed
object at the time you asked for the context it's in.
If you're set on sticking with the class method, you could do
something like the following:
// Written in TextEdit, forgive the formatting
+(id)addHostFromPanel:(NSString *)hostPanel name:(NSString *)hostName
ipAddress:(NSString *)ipAddress group:(NSString *)group
inManagedObjectContext:(NSManangedObjectContext *)objContext
{
self = [super insertNewObjectForEntityForName:@Host
inManagedObjectContext:objContext];
if( self != nil )
{
[self setValue:hostName forKey:@hostNameKey];
etc...
}
return( self );
}
I'm not much of a CoreData ninja but I hope that helps.
Jim
On Thu, Sep 4, 2008 at 6:01 AM, Jon Buys [EMAIL PROTECTED] wrote:
Hello,
I have a problem with my app that is most likely very simple for someone
with experience. I have a core data based application that I would like to
be able to add objects to via a sheet that drops down when the user clicks
the + button (or presses Command-N). On the sheet are two NSTextField and
one NSPopUpButton, an add button and a cancel button. From my AppController
class I can get the values as strings that are entered into the sheet here:
- (IBAction)endAddHostSheet:(id)sender
{
NSString *hostString = [hostNameTextField stringValue];
if ([hostString length] == 0)
{
return;
}
NSLog(@the host name is %@, hostString);
NSString *ipAddressString = [ipAddressTextField stringValue];
if ([ipAddressString length] == 0)
{
return;
}
NSLog(@the ip address is %@, ipAddressString);
NSString *selectedGroupString = [groupsPopUpButton
titleOfSelectedItem];
NSLog(@the selected Group is %@, selectedGroupString);
// Do stuff to add to core data here...
[NSApp endSheet:addHostSheet];
//Goodbye, sheet
[addHostSheet orderOut:sender];
}
But my question is, how can I add these strings to core data?
My core data setup is very simple. I have three entities (one which I'm not
yet using) named Host, Group, and ContactGroup. Host has attributes
hostName, ipAddress, and a to-one relationship named group. Group has an
attribute groupName, and a to-many relationship named hosts.
I've defined classes for the Entities, like this:
#import Cocoa/Cocoa.h
@class ContactGroup;
@class Group;
@interface Host : NSManagedObject {
}
@property (readwrite, retain) ContactGroup *contactGroup;
@property (readwrite, retain) Group *group;
@property (readwrite, copy) NSString *hostName, *ipAddress, *CPU, *RAM,
*hardDrive;
+(id)addHostFromPanel:(NSString *)newHostPanel withName:(NSString
*)newHostName andIpAddress:(NSString *)newIpAddress inGroup:(NSString
*)newGroup;
@end
I've was trying to add the hosts with the addHostFromPanel method defined
above (with a + instead of a -), and implemented like this:
+(id)addHostFromPanel:(NSString *)newHostPanel withName:(NSString
*)newHostName andIpAddress:(NSString *)newIpAddress inGroup:(NSString
*)newGroup
{
// Debug stuff
NSLog(@host name passed over is is %@, newHostName);
NSLog(@ip address passed over is is %@, newIpAddress);
NSLog(@the group passed over is %@, newGroup);
// Here we go!
Host *host = [NSEntityDescription
insertNewObjectForEntityForName:@Host inManagedObjectContext:[self
managedObjectContext]];
host.hostName = newHostName;
host.ipAddress = newIpAddress;
host.group = newGroup;
return host;
}
But, when I try to call this method from my AppController to add the strings
to core data, I get an error (as well as a compile warning) that Host can't
find it's managedObjectContext.
I'm very new to Cocoa (obviously), and right now I'm very confused. I'm
sure I'm missing something very basic here, but I've been stuck on this for
a couple of weeks now.
Thanks in advance for any advice.
Jon
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NSPredicateEditorRowTemplates and preserving user input
Hi List, I noticed something today while building a new popup-popup-popup template: when the user changes the comparator (a simple is/is not in my case), the third popup resets itself to the default value instead of maintaining the selection the user had already chosen. The same is true if the third view in my template is a text field. If they enter text, then change the value from contains to begins with, the text they've entered is removed. I understand that templates are copied like mad behind the scenes of the editor and that popups are treated differently, but I'm not sure how I go about fixing this. I tried subclassing NSPopUpButton to see what is passed for setObjectValue but the editor doesn't seem to like a subclassed NSPopUpButton. Instead, it ignores it and displays nothing. Very strange. Any thoughts on where I should start looking? Thanks -- Jim http://nukethemfromorbit.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 [EMAIL PROTECTED]
Re: NSPredicateEditorRowTemplates and preserving user input
Thanks for the reply Peter. Just for the archives, my subclassed NSPopUpButton wasn't showing up because, like you said, it was being treated differently and I was initializing it with NSZeroRect. Giving it a starting size and sending it sizeToFit in templateViews got it on screen. Jim On Fri, Aug 29, 2008 at 4:17 PM, Peter Ammon [EMAIL PROTECTED] wrote: On Aug 29, 2008, at 8:51 AM, Jim Turner wrote: Hi List, I noticed something today while building a new popup-popup-popup template: when the user changes the comparator (a simple is/is not in my case), the third popup resets itself to the default value instead of maintaining the selection the user had already chosen. The same is true if the third view in my template is a text field. If they enter text, then change the value from contains to begins with, the text they've entered is removed. Hi Jim, This is a known issue and I don't think there's a workaround yet, sorry. I understand that templates are copied like mad behind the scenes of the editor and that popups are treated differently, but I'm not sure how I go about fixing this. I tried subclassing NSPopUpButton to see what is passed for setObjectValue but the editor doesn't seem to like a subclassed NSPopUpButton. Instead, it ignores it and displays nothing. Very strange. If you subclass NSPopUpButton, NSPredicateEditor assumes it has special behavior and you want it to be treated like other views. It's only instances of NSPopUpButton themselves that get the different treatment of being merged together to build the tree of options. -Peter ___ 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 [EMAIL PROTECTED]
Re: NSPredicateEditor
On Wed, Jun 25, 2008 at 1:08 AM, Chris [EMAIL PROTECTED] wrote: Let's say I create a NSPredicateEditor and it looks like this: [All] of the following are true: [Name] equals [ ] --- So the user enters say Fred and the predicate returned is Name == Fred. Later on, I reload that predicate into the NSPredicateEditor and it looks like this: [Name] equals [ Fred ] --- But now there is no option to change it to say: [Some] of the following are true: because that line isn't shown. How do I make that line reappear the next time? By default, the NSPredicateEditor object in IB creates a compound predicate. Wrap your Name == Fred predicate in a compound predicate before reloading it in the editor and the Any/All/None row should return. -- Jim http://nukethemfromorbit.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 [EMAIL PROTECTED]
Re: NSPredicateEditorRowTemplate
On Tue, Jun 24, 2008 at 2:02 AM, Chris [EMAIL PROTECTED] wrote: When the user clicks ok, then I call objectValue on the NSPredicateEditor and it calls predicateWithSubpredicates not on object C, but on object B, which is always going to be blank, because it is in fact object C which is the one displayed. Thus I can never retrieve values from the row. This phantom and unexplained object B that is created during NIB loading suddenly seems to be the one it cares about. I'm not sure where to go next. Has anyone got any advice? Hi Chris, I saw this very same behavior and was fortunate enough to get the following explanation from Peter Ammon: A single row may be composed of views from multiple templates. When it's time to construct a predicate for that row, we pick one template, and if its views are not actually in the row, we call objectValue on the view in the row, and then setObjectValue: on the corresponding view in your template. Due to a bug, this happens more often than it should :( What this means for your NSTextField subclass is that it should do the right thing for objectValue and setObjectValue:. The object value of your view should encapsulate all the state your template needs to compute that portion of the predicate. The short answer, for me at least, was to make sure my custom NSTextField in my template handled objectValue/setObjectValue: properly. That way, when predicateWithSubpredicates: is called, the internals of the editor can pass around the values needed to properly compute the predicate. -- Jim http://nukethemfromorbit.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 [EMAIL PROTECTED]
Re: NSPredicateEditorRowTemplate
On Tue, Jun 24, 2008 at 8:46 AM, Chris [EMAIL PROTECTED] wrote:
Hi!
This is very interesting information. Wish it was in the doco!
I have a custom view which wasn't responding to setObjectValue /
objectValue.
When I add those methods I find that on startup it does indeed copy the
values from object C to object B. This means that when I retrieve the
values later on, instead of returning blank like before, it now returns the
old value instead of blank. However I need the new value! If it were to copy
the values across AFTER the user made changes or prior to me calling
objectValue, then it would work. I thought maybe [rulePredicateEditor
reloadPredicate] sounded like it might do it perhaps, but that doesn't help
either. Once the user hits ok, we are still left with bogus values from
object B, albeit now old values instead of nil values.
How are you accessing your custom view's object value? It almost
sounds like you're asking your original custom view for it's value
each time instead of the object currently being displayed.
When you create your template and insert your custom view, make sure
to keep a reference to that specific object so you can query it later
on.
@interface CustomPredicateEditorRowTemplate : NSPredicateEditorRowTemplate
{
CustomTextField *myTextField;
}
-(CustomTextField *) myTextField;
@end
@implementation CustomPredicateEditorRowTemplate
-(CustomTextField *) myTextField
{
if( !myTextField )
// init your view
return( myTextField );
}
- (NSArray *)templateViews
{
return( [[super templateViews] arrayByAddingObject:[self myTextField]] );
}
-(void) dealloc
{
[myTextField release];
[super dealloc];
}
- (NSPredicate *)predicateWithSubpredicates:(NSArray *)subpredicates
{
id objectValue = [[self myTextField] objectValue];
// Do magical things with objectValue
}
@end
--
Jim
http://nukethemfromorbit.com
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Re: NSPredicate for a ANY match based on two properties at once
On Fri, Jun 20, 2008 at 10:56 AM, Jesse Grosjean [EMAIL PROTECTED] wrote: I'm having a hard time figuring out how to construct a query. The objects involved are: Entry - has many tags Tag - name (string) - value (string) I want to construct searches such as: - find all entries that have a the tag named priority with the value 1. I can use [NSPredicate predicateWithFormat:@ANY tags.name = %@, tag.name] to find all entries that have a particular tag... but I don't know how to also figure in the value. I don't need this predicate to work with a database, these queries are all just being run in memory, with my own custom model objects (not using Core Data). If there is no way to do this in a format string, is there some way to do it by directly constructing a predicate object? Thanks, Jesse ___ Jesse, I'm thinking NSCompoundPredicate is what you're looking for. You should be able to do something like this: NSPredicate *tagPredicate = [NSPredicate predicateWithFormat:@ANY tags.name = %@, tag.name]; NSPredicate *valuePredicate = [NSPredicate predicateWithFormat:@ANY tags.value = %@, tag.value]; NSPredicate *combinedPredicate = [NSComparisonPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects:tagPredicate, valuePredicate,nil]]; If the simple predicateWithFormat: predicates don't work, NSComparisonPredicates will definitely do what you need (I've never tried creating a compound predicate with predicateWithFormat: predicates) -- Jim http://nukethemfromorbit.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 [EMAIL PROTECTED]
Re: NSPredicate for a ANY match based on two properties at once
On Fri, Jun 20, 2008 at 2:06 PM, Jesse Grosjean [EMAIL PROTECTED] wrote: I want to construct searches such as: - find all entries that have a the tag named priority with the value 1. NSPredicate *tagPredicate = [NSPredicate predicateWithFormat:@ANY tags.name = %@, tag.name]; NSPredicate *valuePredicate = [NSPredicate predicateWithFormat:@ANY tags.value = %@, tag.value]; NSPredicate *combinedPredicate = [NSComparisonPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects:tagPredicate, valuePredicate,nil]]; Thanks, but I don't think this quite works. The problem is that the two ANY predicates aren't forced to match against the same tag. So if the potential matching entry has multiple tags this query will match if any of those tags match the tag name, and if any of the tags values match the tag name, but there's no constraint that a the same tag value pair matches both constraints. Jesse You are correct, it doesn't work. And in trying to figure this out, I've come to realize that I've used predicates the hard way in some of my code. Try this instead: NSPredicate *pred = [NSPredicate predicateWithFormat:@(SUBQUERY( tags, $x, $x.name = %@ AND $x.value = %@)[EMAIL PROTECTED] != 0), @aNameToMatch, @aValueToMatch]; Appears that this was a problem in 10.4 and fixed in 10.5. NSExpression's documentation for expressionForSubquery:usingIteratorVariable:predicate: has some discussion about it. -- Jim http://nukethemfromorbit.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 [EMAIL PROTECTED]
NSSearchField in menu item weirdness
I have a custom NSView that contains static text and a NSSearchField,
it's your run-of-the-mill attempt to provide live search in a menu, a
la the Apple help menu.
My issue is that while I can get the cursor into the search field, if
I type something other than standard text (arrow keys, home, end,
etc), the search field's action is fired and I receive the character
value of said key. As you can surmise, this doesn't really return the
right results. I would like the user to be able to use the down arrow
key to move out of the search field, so I implemented
controlView:textView:doCommandBySelector: for the search field's
delegate to catch moveDown:
This never gets called unless I actually click in the search field.
My custom NSView has this as it's implementation of
viewDidMoveToWindow to move the cursor into the field:
-(void) viewDidMoveToWindow
{
[[self window] makeFirstResponder:searchField];
}
It almost seems like this isn't really making the field the first
responder, at least not in the way that clicking on the field does.
Any thoughts on how to properly assign first responder status to a
text field in a view of a NSMenuItem?
And as a somewhat related question, can one programmatically change
the highlighted item in a menu? There doesn't appear to be a
selectMenuItemAtIndex: method...
As always, thanks
--
Jim
http://nukethemfromorbit.com
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Re: KVO autonotifying complaining about custom setter return value
Chris,
On Tue, Mar 4, 2008 at 9:47 PM, Chris Suter [EMAIL PROTECTED] wrote:
On 05/03/2008, at 2:10 PM, Kyle Sluder wrote:
On Tue, Mar 4, 2008 at 11:49 AM, Jim Turner
[EMAIL PROTECTED] wrote:
In attempting to use a custom setter for a object, I'm getting the
following message in the console the first time that object is
instantiated:
KVO autonotifying only supports -setKey: methods that return void.
Autonotifying will not be done for invocations of -[MyObject
setValue:]
[snip]
-(void) setValueForBindings:(id)_value
{
[self willChangeValueForKey:@value];
{
BOOL didSetOK = [self setStringValue:(NSString
*)_value];
// Do something with didSetOK
}
[self didChangeValueForKey:@value];
}
Please re-read the second sentence of that error again. You are
manually invoking -willChangeValueForKey: and -didChangeValueForKey:
and KVO is complaining I've already done that!. Either stop doing
that, or implement -automaticallyNotifiesObserversForKey: to return NO
for the bindings key.
Actually, these were never getting called at all. Read below.
Implementing -automaticallyNotifiesObserversForKey: will solve the
problem but just removing the calls to -willChangeValueForKey: and -
didChangeValueForKey: won't.
I suspect the real cause of the problem is that there's a setValue:
method defined in the superclass that returns something.
Actually, there was a -(BOOL) setValue: method in the object itself
that was getting called, I simply didn't see it in there. KVO/KVC was
finding it instead of my defined setter method, as it should have.
Having +automaticallyNotifiesObserversForKey: return NO for value
stopped the warning, but observation stopped as well, regardless if I
posted will/didChangeValueForKey because my custom setter still wasn't
getting called (the ivar was getting accessed directly)
When I implement +accessInstanceVariablesDirectly and have it return
NO, KVO then complains that my object is now no longer compliant even
though I have valid values for getter and setter defined in the
property declaration. The object responds to my custom methods but is
missing the connection that the property should be using those as well
instead of the default.
I filed a bug (rdar://problems/5781977) as this doesn't appear to be
proper behavior. I'd be happy to be told I'm wrong if you can point
out what I'm missing.
If you're going to be using KVO/KVC on your objects, you should
probably reconsider whether it's a good idea for your setter/getter
methods to use non-default names. Obviously, you can change the name
of your property if it clashes with methods in your superclass.
- Chris
Thanks
--
Jim
http://nukethemfromorbit.com
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Re: KVO autonotifying complaining about custom setter return value
On Wed, Mar 5, 2008 at 12:00 PM, mmalc crawford [EMAIL PROTECTED] wrote: On Mar 5, 2008, at 9:34 AM, Jim Turner wrote: I filed a bug (rdar://problems/5781977) as this doesn't appear to be proper behavior. I'd be happy to be told I'm wrong if you can point out what I'm missing. I believe this behaves correctly. As stated in http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/chapter_5_section_5.html# , Key-value coding and declared properties are orthogonal technologies. KVC doesn't know about any custom setter you may have defined for a property. mmalc Hmm, it appears the developer documentation I have locally on my machine is slightly out of date. After reading that link (and the updated description of setter= and getter=), I see now why what I'm doing isn't working. Properties and KVO/KVC aren't complimentary to each other... although it'd be nice if they were. I'll have to re-work my object to get it to be properly compliant. But, I still appear to have an issue with defining a custom getter/setter. Defining a property as @property (setter=mySetMethod:,getter=myMethod) id valueTest; and sending my object a valueTest message, I get the unrecognized selector sent to instance warning. Reading (and re-reading several times) http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/chapter_5_section_3.html#//apple_ref/doc/uid/TP30001163-CH17-SW17 it appears that I don't need to define anything other than the @property but unless I also place -(id) valueTest; -(void) setValueTest:(id)_value; in the interface, the object can't find a method signature. This is a little more confusing that I originally thought. I appreciate all the help, though. -- Jim http://nukethemfromorbit.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 [EMAIL PROTECTED]
Re: KVO autonotifying complaining about custom setter return value
On Wed, Mar 5, 2008 at 4:14 PM, mmalc crawford [EMAIL PROTECTED] wrote:
On Mar 5, 2008, at 1:40 PM, Adam P Jenkins wrote:
If you define a @property in the interface, then in the
implementation you either need use @synthesize to have the compiler
automatically generate a getter and setter, or use @dynamic to
inform the compiler that you will provide the appropriately named
getter and setter methods.
There is no *need* to specify @dynamic. In fact, doing so will
conceal a bug (at least until runtime...) if you don't intend to
create the appropriate methods at runtime (as do, for example, managed
objects) but forget to provide an implementation. If you don't
specify @dynamic, then the compiler will warn you if you don't supply
appropriate methods at compile time.
If you need to define the accessors yourself because the auto-
generated ones don't do what you want, then use @dynamic instead
like this:
@implementation Person
@dynamic firstName;
- (NSString*)firstName { ... }
- (void)setFirstName:(NSString *)newName { ... }
@end
It's perfectly reasonable also to do either:
@implementation Person
- (NSString*)firstName { ... }
- (void)setFirstName:(NSString *)newName { ... }
@end
or, for example:
@implementation Person
@synthesize firstName;
- (void)setFirstName:(NSString *)newName { ... }
@end
In the latter case, the compiler will just synthesise -firstName.
One further issue for the sake of raising it:
@property (setter=mySetMethod:,getter=myMethod) id valueTest;
Note that this implies that the accessor methods are atomic. It's
comparatively rare (unless you're using GC) that Cocoa developers
implement atomic accessor methods, so you'd typically specify:
@property (nonatomic, setter=mySetMethod:,getter=myMethod) id valueTest;
mmalc
Ok first, mmalc, thank you for taking the time to point out exactly
what I needed to see to understand where I was going wrong. My
problem stemmed from the misguided idea that properties were required
for KVC/KVO. Chris' comment about using non-default names makes
much more sense now.
Second, for my situation, I ended up with an interface that looks like this:
@property (getter=getValueForBindings, setter=setValueForBindings:,
assign, nonatomic) id value;
And an implementation:
-(void) setValueForBindings:(id)_value
{
[self willChangeValueForKey:@value];
{
BOOL didSetOK = [self setStringValue:(NSString *)_value];
// Do something with didSetOK
}
[self didChangeValueForKey:@value];
}
-(id) getValueForBindings
{
return( value );
}
Then binding my interface to the key 'valueForBindings'. Not the
prettiest, but it's required for my situation.
Thanks again to everyone for all the help.
--
Jim
http://nukethemfromorbit.com
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