Re: How to get finder type Open With dialog box
On Wed, Apr 29, 2009 at 1:52 AM, Parimal Das parimal@webyog.com wrote: What i want to do is, when my code encounters a unknown file extension, it should open the finder type Open With dialog box for user to choose the app from the list. There is no Open With dialog box, at least not one that's analogous to Windows. You can specify type associations in Finder, sure, but the actual dialog used for selecting applications is just a standard Open panel. Run an NSOpenPanel modal for the type @com.apple.application. --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
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: iphone SDK session duration
Sorry for the delay in response. I'll need more help.
I follow suggestions on using applicationDidFinishLaunching: and
applicationWillTerminate: methods on AppDelegate.
It won't print NSLog when I stop the app on Console and throw errors when I
leave the app on simulator by pressing the home button to exist the app like
the device.
I didn't get any warnings or errors on building the project.
I used NSLog(@Session: %.1f, [now timeIntervalSinceDate:then]);
Please help!
*project code:*
http://code.google.com/p/iphonebuilder/downloads/list
- (void)applicationDidFinishLaunching:(UIApplication *)application {
// Starting Session
}
- (void)applicationWillTerminate:(UIApplication *)application {
// Ending Session
}
*Errors on console when I exit the app on simulator*
*** -[NSObject timeIntervalSinceReferenceDate]: unrecognized selector sent
to instance 0x521fe0
2009-04-28 17:07:32.283 sessiontime[22584:20b] CoreAnimation: ignoring
exception: *** -[NSObject timeIntervalSinceReferenceDate]: unrecognized
selector sent to instance 0x521fe0
On Wed, Apr 22, 2009 at 9:57 AM, Luke the Hiesterman luket...@apple.comwrote:
What's wrong with the NSDate solution below?
Luke
On Apr 21, 2009, at 10:49 PM, Bess Ho wrote:
I couldn't get any working responses from iphone developer forum or iphone
meetup group. I am hoping that this group with more experience cocoa
developers with understanding on MVC model, Xcode.
On Tue, Apr 21, 2009 at 6:47 PM, Luke the Hiesterman
luket...@apple.comwrote:
Sounds like you've already answered your question.
Luke
On Apr 21, 2009, at 4:00 PM, Bess Ho wrote:
Is this appropriate mailing list to ask iphone SDK questions?
How do you measure session duration on a utility application with 3
ViewControllers?
Use NSDate to mark the starting and ending the session and print the time
lapsed on NSLog.
--
Bess Ho
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--
Bess Ho
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Re: Storing a table view in user defaults
On Tue, Apr 28, 2009 at 2:31 PM, Jerry Krinock je...@ieee.org wrote: On 2009 Apr 28, at 08:04, Ryan Briones wrote: My problem is that I have a table view that's bound to an array controller backed by user defaults in IB. I don't know what backed by means. Sorry for not using the proper terminology. I have a table view whose columns are bound to an array controller (Controller Key: arrangedObjects, Model Key Path: name, etc) and the array controller is bound to shared user defaults (Controller key: values, Model Key Path: arrayOfThings). Also I have a button that send add: to the array controller and a button that sends delete: and Enabled is bound to canRemove: on the array controller. Seems like pretty standard setup from what I can tell. When I click add, I get an empty row (selected) in the table view. I can then double click on the row and edit the columns. If I click add again, the first row is emptied out and the second row is selected and empty. If I exit the application at this point and relaunch, the table view has 2 empty rows. I hope this helps explain my problem better...Sorry for the confusion. The 'content' binding of your array controller should be bound to an NSUserDefaults object (labelled Shared Defaults by Interface Builder) with Controller Key = 'values' Model Key Path = keyToYourArrayInRootOfUserDefaults. ___ 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/ryan.briones%40brionesandco.com This email sent to ryan.brio...@brionesandco.com -- Ryan Carmelo Briones ___ 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: Storing a table view in user defaults
Hey, thanks! I actually ran across your code last night when I was first doing this. I ran your code and it worked fine. I created a test project to copy your code, and mine failed. I tried looking at every checkbox and every key path, nothing worked. I've uploaded my the test project to github. I'd love it if you guys could take a look, and tell me what I'm doing wrong. I feel like it's an exact copy, but it doesn't work. Hopefully this can provide an insight into my stupidity. http://github.com/ryanbriones/tableview-userdefaults If you don't have git, you can download a zip or tarball from the downloads tab. Thanks! On Tue, Apr 28, 2009 at 5:00 PM, Steven Riggs steven.ri...@me.com wrote: Check out the sample code here that demonstrates storing a dictionary in defaults with no code. http://idisk.mac.com/steven.riggs-Public?view=web I hope it helps... Steven Riggs On Apr 28, 2009, at 11:04 AM, Ryan Briones wrote: I'm a relative newb when it comes to cocoa programming, but I've been trying to finish of a project and put it out there so I can get some feedback and continue to get better. My problem is that I have a table view that's bound to an array controller backed by user defaults in IB. Adding a single new row works fine, but if I add any more, the data from the previous rows gets wiped out, but the actual rows get preserved. Further more, if I create a row and exit/relaunch the rows are persisted, but the data is not. If feel like I'm missing some important detail, but I can't figure out what. Any help is appreciated. Thanks. -- Ryan Carmelo Briones ___ 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/steven.riggs%40me.com This email sent to steven.ri...@me.com -- Ryan Carmelo Briones ___ 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 to make NSSplitView not dragable
On 28 Apr 2009, at 17:44:38, Ashish Tiwari wrote:
Hi All,
I have a horizontal NSSplitView, I want the splitter bar should
remain in a fixed postion and user should not be able to change size
of upper subview or lower subview by dragging it.
Note: Split bar should be visible but not be drag able.
Thanks,
Ashish
@implementation DisabledSplitView
- (void)awakeFromNib
{
[self setDelegate:self];
}
- (NSRect)splitView:(NSSplitView *)theSplitView effectiveRect:
(NSRect)proposedEffectiveRect forDrawnRect:(NSRect)drawnRect
ofDividerAtIndex:(NSInteger)dividerIndex
{
// Effectively disables splitter
return NSZeroRect;
}
- (void)drawDividerInRect:(NSRect)aRect
{
// Do nothing
}
@end
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Re: C string constant-NSString constant without defining twice?
On 28.04.2009, at 22:58, Erg Consultant wrote: Except in the case where one line of code creates the temp file and then another immediately uses it and deletes is - as in my case. There is zero chance the user could FUS faster than my 2 lines of code create and delete the file. Wish that were true. You'd be surprised how fast some users manage to switch, or how a slow disk can cause the operation to pause long enough for FUS to be done. And even if that weren't the case, keep in mind that there are various ways (VNC, AppleScript etc.) how a user could trigger the action on a switched-out user as well. This is Unix, we have remote logins. Don't make assumptions just because you're lazy. Friends don't let friends hardcode absolute paths. Cheers, -- Uli Kusterer The Witnesses of TeachText are everywhere... http://www.zathras.de ___ 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 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: iphone SDK session duration
Luke already told you six hours before your post: Am 29.04.2009 um 02:10 schrieb Bess Ho: *** -[NSObject timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x521fe0 2009-04-28 17:07:32.283 sessiontime[22584:20b] CoreAnimation: ignoring exception: *** -[NSObject timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x521fe0 You are asking an NSObject for timeIntervalSinceReferenceDate. You need an NSDate. Your variable named now is NOT an NSDate. atze ___ 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
Crashing resetting or releasing an NSManagedObjectContext
Hi list,
I'm hoping you guys can help me. I'm loading up a Core Data store,
copying some data out and attempting to clear it all up. I use this
code for my Quicklook plugin, and in parts of my app for previewing
documents in a more advanced manner than Quicklook provides.
This is how I set up my ManagedObjectContext:
+(Pet *)petAtURL:(NSURL *)url {
NSManagedObjectModel *managedObjectModel =
[KNClarusQuickDocumentParser managedObjectModel];
NSPersistentStoreCoordinator *coordinator =
[[[NSPersistentStoreCoordinator alloc]
initWithManagedObjectModel:managedObjectModel] autorelease];
[coordinator addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:url
options:nil
error:error];
NSManagedObjectContext *moc = [[NSManagedObjectContext alloc] init];
// ^ Not Autoreleasing here. It's the responsibility of the
caller to release the MOC. Autoreleasing causes crashes.
[moc setPersistentStoreCoordinator:coordinator];
[[moc undoManager] disableUndoRegistration];
NSError *fetchError = nil;
NSArray *fetchResults;
NSFetchRequest *fetchRequest = [[[NSFetchRequest alloc] init]
autorelease];
NSEntityDescription *entity = [NSEntityDescription entityForName:@Pet
inManagedObjectContext:moc];
[fetchRequest setEntity:entity];
fetchResults = [moc executeFetchRequest:fetchRequest
error:fetchError];
if ((fetchResults != nil) ([fetchResults count] == 1)
(fetchError == nil))
{
NSManagedObject *pet = [[fetchResults objectAtIndex:0] retain];
return [pet autorelease];
}
return nil;
}
And this is how I get the data out and release it:
Pet *pet = [KNClarusQuickDocumentParser petAtURL:url];
// Copy out some data.
NSManagedObjectContext *context = [pet managedObjectContext];
if (context) {
[context reset]; // This call results in EXC_BAD_ACCESS
[context setPersistentStoreCoordinator:nil];
[context release];
}
return [dict autorelease];
End code
Different combinations of trying to do this right result in crashes at
different points. Leaving out [context reset] and just releasing it
obviously gives EXC_BAD_ACCESS again. Autoreleasing the MOC in
+petAtURL: causes crashes when the autorelease pool pops. The only way
I can get it to not crash is to -init the MOC and never release or
autorelease it, but that's causing memory leaks!
Is there a good example anywhere of how to set up and tear down a Core
Data document correctly?
Thanks,
-- Daniel
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Re: NSRunLoop vs. NSThread sleep
On 29 Apr 2009, at 00:57, Eric Hermanson wrote: When implementing the while-loop in the main function of an NSThread, is it correct to assume it is more efficient on the operating system to run the current run-loop until a specified date rather than just use NSThread sleepUntilDate to obtain the delay? If you're talking about a secondary thread, NSThread's -sleepUntilDate is probably better. But you don't even need to use that; you could use sleep() or nanosleep() or even select(). However... I ask because I don't really need a formal run loop or special input source as I'm just checking a shared queue for data (and the delay is to allow the thread to gracefully exit). ...you shouldn't be polling your shared queue, *unless* you have some real-time requirement that necessitates that architecture, *or* you're certain that, for the entire lifetime of your thread, the chances are that the queue will always be full by the time the thread gets to check it. If you aren't sure you need to poll, you probably don't want to be polling. What you should be doing instead is either using a semaphore or an NSConditionLock to set things up such that your thread doesn't run at all unless there's work to do. So it's simpler to code just the NSThread sleep, however, I am guessing that will cause me context switching performance issues and I'd be better off using the NSRunLoop? If the NSRunLoop has nothing to do, I imagine it does the same thing anyway. Finally, is it acceptable to use the NSThread's cancelled/ isCancelled mechanism to check for the thread-exit hint, rather than set/check a global variable in the NSThread threadDictionary (as Apple's documentation shows)? That's what -cancel and -isCancelled are designed for. That said, if I were implementing a thread to managed a work queue (which is what you're doing), I'd be inclined to override the default implementations so that they added an item to the work queue... that way the thread could block on the work queue and would wake up if someone sent - cancel to it. But all of this is somewhat academic in a way, because Apple has handily provided NSOperationQueue for you which is probably what you should be using unless you have some backwards compatibility requirement or some other requirement that NSOperationQueue doesn't satisfy. Kind regards, Alastair. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
C language in obj-c
Dear All, may be this question is odd, but i wana use .obj file created in c language, in objective-c. is it possible?? thanks in advance. Regards, Fawad Shafi _ Rediscover Hotmail®: Now available on your iPhone or BlackBerry http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Mobile2_042009___ 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: C string constant-NSString constant without defining twice?
On 28 Apr 2009, at 21:58, Erg Consultant wrote: Except in the case where one line of code creates the temp file and then another immediately uses it and deletes is - as in my case. There is zero chance the user could FUS faster than my 2 lines of code create and delete the file. Honestly, I can think of lots of ways to get around that kind of thing (depending on exactly what I wanted to achieve). It really, genuinely is a security hole, no matter how fast you think your program might be running (and it might be going much slower than you think for one reason or another). Kind regards, Alastair. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: C string constant-NSString constant without defining twice?
On 29 Apr 2009, at 01:33, Gwynne Raskind wrote: [NSFileHandle initWithFileDescriptor:fileno(tmpfile()) closeOnDealloc:NO]. Oops, now I have to keep track of the FILE* for as long as the NSFileHandle* exists. Well you could use dup() to get around that, not that the above is the best thing to do anyway. Kind regards, Alastair. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: C language in obj-c
On 29 Apr 2009, at 11:04, fawad shafi wrote: may be this question is odd, but i wana use .obj file created in c language, in objective-c. is it possible?? It depends what you mean. If you're asking if it's possible to use C code in a program that uses ObjC, of course. Usually you'd include the C source code in your project and Xcode will just compile it for you when you hit Build. Then you use the usual mechanisms to make use of your C code from your ObjC files (i.e. the extern keyword, function prototypes, header files and so on). You can, of course, include C code in ObjC files directly, since ObjC is just a superset of the underlying C language. If you are asking whether you can use .obj files built by (for instance) Microsoft's compiler, the answer is no. Microsoft's .obj files use an extended form of COFF, whereas the .o files generated by OS X compilers use Mach-O, and while it's theoretically possible that you could convert a COFF file to Mach-O and feed it through the OS X linker, the platforms have different ABIs (calling conventions, structure layout conventions and the like) and so most likely it would just break. If you're asking whether it's possible to include an object file in a project in a general sense, again the answer is yes. You might need to feed the linker some additional arguments though, to make it link against the extra object. However, as I say, the object file needs to be a Mach-O object and not (for instance) a Microsoft .obj file. Kind regards, Alastair. p.s. This type of question is better addressed to xcode-dev. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: C language in obj-c
On 29 Apr 2009, at 11:25, Alastair Houghton wrote: Kind regards, Alastair. p.s. This type of question is better addressed to xcode-dev. Of course I meant xcode-users :-D Kind regards, Alastair. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: C language in obj-c
Le 29 avr. 09 à 12:04, fawad shafi a écrit : Dear All, may be this question is odd, but i wana use .obj file created in c language, in objective-c. is it possible?? thanks in advance. Obj-C is a superset of C and can access any C code just like you can from any other C file. ___ 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: C language in obj-c
On 29 Apr 2009, at 11:29, fawad shafi wrote: for example i write one program in c language and then compile it, the compiler will create the one .obj file for us. if i wana use that obj file in xcode or obj-c, is it possible?? The system compiler on Mac OS X doesn't make files with the extension .obj, even for plain C code. That's why I suspected you might be talking about some other compiler (my guess being Microsoft's, since that's the most common place where you might see a .obj extension). Anyway, the easiest thing to do is to put your C source files into your Xcode project and it will compile them and link them against the rest of your program. Then you don't need to bother about the object files at all. Kind regards, Alastair. p.s. Please always reply to the list as well as directly. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
RE: C language in obj-c
thanks for this useful info. is it possible? existing code that (possibly written in C) that we can easily port over to obj-c with minimum effort. Regards, Fawad Shafi CC: cocoa-dev@lists.apple.com From: alast...@alastairs-place.net To: fawadpaki_...@hotmail.com Subject: Re: C language in obj-c Date: Wed, 29 Apr 2009 11:33:54 +0100 On 29 Apr 2009, at 11:29, fawad shafi wrote: for example i write one program in c language and then compile it, the compiler will create the one .obj file for us. if i wana use that obj file in xcode or obj-c, is it possible?? The system compiler on Mac OS X doesn't make files with the extension .obj, even for plain C code. That's why I suspected you might be talking about some other compiler (my guess being Microsoft's, since that's the most common place where you might see a .obj extension). Anyway, the easiest thing to do is to put your C source files into your Xcode project and it will compile them and link them against the rest of your program. Then you don't need to bother about the object files at all. Kind regards, Alastair. p.s. Please always reply to the list as well as directly. -- http://alastairs-place.net _ Rediscover Hotmail®: Now available on your iPhone or BlackBerry http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Mobile2_042009___ 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: C language in obj-c
On 29 Apr 2009, at 11:35, Jean-Daniel Dupas wrote: Le 29 avr. 09 à 12:25, Alastair Houghton a écrit : Just for the record, with gcc-llvm, you can no longer assume that .o files are Mach-O object files. When you use Link-Time-Optimization (or -O4) with llvm-gcc (or clang), it produces llvm bytecode (even if the output extension remain .o) That's a good point. They still aren't COFF though, and you can still link Mach-O objects with the LLVM bitcode. Also, I haven't looked but it wouldn't surprise me to find that the .o files still had a Mach-O wrapper around the bitcode itself. Kind regards, Alastair. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSRunLoop vs. NSThread sleep
On Wed, Apr 29, 2009 at 6:00 AM, Alastair Houghton alast...@alastairs-place.net wrote: But all of this is somewhat academic in a way, because Apple has handily provided NSOperationQueue for you which is probably what you should be using unless you have some backwards compatibility requirement or some other requirement that NSOperationQueue doesn't satisfy. NSOperationQueue is broken: http://www.mikeash.com/?page=pyblog/dont-use-nsoperationqueue.html I am not under NDA at the moment, so I'll point out that 10.5.7 is rumored to have fixes for NSOperationQueue. If that bears out to be true, then by all means run with NSOperationQueue. If not, you might want to hold off until Snow Leopard -- it wouldn't be the first time that Apple engineers (or anyone else, for that matter) have tackled a bug but missed some corner cases until the next major release. --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: C language in obj-c
Le 29 avr. 09 à 12:25, Alastair Houghton a écrit : On 29 Apr 2009, at 11:04, fawad shafi wrote: may be this question is odd, but i wana use .obj file created in c language, in objective-c. is it possible?? It depends what you mean. If you're asking if it's possible to use C code in a program that uses ObjC, of course. Usually you'd include the C source code in your project and Xcode will just compile it for you when you hit Build. Then you use the usual mechanisms to make use of your C code from your ObjC files (i.e. the extern keyword, function prototypes, header files and so on). You can, of course, include C code in ObjC files directly, since ObjC is just a superset of the underlying C language. If you are asking whether you can use .obj files built by (for instance) Microsoft's compiler, the answer is no. Microsoft's .obj files use an extended form of COFF, whereas the .o files generated by OS X compilers use Mach-O Just for the record, with gcc-llvm, you can no longer assume that .o files are Mach-O object files. When you use Link-Time-Optimization (or -O4) with llvm-gcc (or clang), it produces llvm bytecode (even if the output extension remain .o) ___ 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: C language in obj-c
Le 29 avr. 09 à 12:39, Alastair Houghton a écrit : On 29 Apr 2009, at 11:35, Jean-Daniel Dupas wrote: Le 29 avr. 09 à 12:25, Alastair Houghton a écrit : Just for the record, with gcc-llvm, you can no longer assume that .o files are Mach-O object files. When you use Link-Time-Optimization (or -O4) with llvm-gcc (or clang), it produces llvm bytecode (even if the output extension remain .o) That's a good point. They still aren't COFF though, and you can still link Mach-O objects with the LLVM bitcode. Also, I haven't looked but it wouldn't surprise me to find that the .o files still had a Mach-O wrapper around the bitcode itself. In fact, they don't. To handle these files, 'ld' try to load libLTO.dylib which works with llvm bytecode files directly. You can even manipulate them using llvm tools (you can use llvm-dis on such .o file to get the corresponding llvm assembly for example). ___ 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: C language in obj-c
That depends upon the nature of the existing code... Quoting fawad shafi fawadpaki_...@hotmail.com: thanks for this useful info. is it possible? existing code that (possibly written in C) that we can easily port over to obj-c with minimum effort. Regards, Fawad Shafi CC: cocoa-dev@lists.apple.com From: alast...@alastairs-place.net To: fawadpaki_...@hotmail.com Subject: Re: C language in obj-c Date: Wed, 29 Apr 2009 11:33:54 +0100 On 29 Apr 2009, at 11:29, fawad shafi wrote: for example i write one program in c language and then compile it, the compiler will create the one .obj file for us. if i wana use that obj file in xcode or obj-c, is it possible?? The system compiler on Mac OS X doesn't make files with the extension .obj, even for plain C code. That's why I suspected you might be talking about some other compiler (my guess being Microsoft's, since that's the most common place where you might see a .obj extension). Anyway, the easiest thing to do is to put your C source files into your Xcode project and it will compile them and link them against the rest of your program. Then you don't need to bother about the object files at all. Kind regards, Alastair. p.s. Please always reply to the list as well as directly. -- http://alastairs-place.net _ Rediscover Hotmail®: Now available on your iPhone or BlackBerry http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Mobile2_042009___ 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/jmunson%40his.com This email sent to jmun...@his.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: NSRunLoop vs. NSThread sleep
On 29 Apr 2009, at 11:44, Kyle Sluder wrote: On Wed, Apr 29, 2009 at 6:00 AM, Alastair Houghton alast...@alastairs-place.net wrote: But all of this is somewhat academic in a way, because Apple has handily provided NSOperationQueue for you which is probably what you should be using unless you have some backwards compatibility requirement or some other requirement that NSOperationQueue doesn't satisfy. NSOperationQueue is broken: http://www.mikeash.com/?page=pyblog/dont-use-nsoperationqueue.html Yes, it is, though I was under the impression that not everyone was seeing problems with it. However, given the simpler sample program Mike put in the comments, it does look pretty borked to me. Anyway, there's always http://www.rogueamoeba.com/utm/2008/12/01/raoperationqueue-an-open-source-replacement-for-nsoperationqueue/ (for instance). Kind regards, Alastair. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
[OT] Re: C language in obj-c
On 29 Apr 2009, at 11:36, fawad shafi wrote: thanks for this useful info. is it possible? existing code that (possibly written in C) that we can easily port over to obj-c with minimum effort. You don't need to port C code to ObjC. ObjC is just C with some simple extensions. Similarly, ObjC++ is just C++ with the same simple extensions. The only problems you might have are things like non-portable assumptions in your code (e.g. structure layouts, byte ordering if you're targeting PPC machines as well as Intel, inline assembler) or places where your code isn't properly standards compliant. Exactly how much trouble you have depends on how portable the original code was. Just include the source files in your Xcode project, then hit Build. If you have errors at that point, you'll need to fix them. You'll also need to test quite carefully if this code is coming from another platform. Kind regards, Alastair. -- http://alastairs-place.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
It doesn't work without the NSLog()... Why?
Hello.
It's a very funny thing. And i do hope i am not bonkers. But the
following code works fine until i delete the line with NSLog().
In the latter case it just returns an empty array. Are there any sane
reasons why that can happen?
- (NSArray *) selectWordsBeginningWith:(NSString *) s {
NSLog(@We do call SelectWordsBeginningWith); //- here is that
line.
NSString *searchString = [NSString stringWithFormat:@%...@%@, s,
@%%];
NSMutableArray *mutableRet = [[NSMutableArray alloc]init];
[self intoArray:mutableRet addItemFromTable:@english
usingStatement:readEnglish andSearchString:searchString];
[self intoArray:mutableRet addItemFromTable:@russian
usingStatement:readRussian andSearchString:searchString];
sqlite3_reset(readEnglish);
sqlite3_reset(readRussian);
NSArray *ret = [mutableRet copy];
// NSLog(@The number of items to be returned is: %i, [ret count]);
[mutableRet release];
return ret;
}
Thank you in advance,
Timofey.
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Re: It doesn't work without the NSLog()... Why?
2009/4/29 Тимофей Даньшин ok5.ad...@gmail.com: It's a very funny thing. And i do hope i am not bonkers. But the following code works fine until i delete the line with NSLog(). In the latter case it just returns an empty array. Are there any sane reasons why that can happen? No, there is no sane reason for this behavior. Though I remember reading a story very recently somewhere in which someone had this exact issue, and it had to do with the way that NSLog left the stack when it completed. You probably have a memory management or other issue somewhere, perhaps in wherever is calling -selectWordsBeginningWith:. But you haven't posted nearly enough code to make even an educated guess. You need to post the code for -intoArray:addItemFromTable:usingStatement:andSearchString: at the very least. --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: It doesn't work without the NSLog()... Why?
On 29/04/2009, at 10:05 PM, Тимофей Даньшин wrote: NSArray *ret = [mutableRet copy]; // NSLog(@The number of items to be returned is: %i, [ret count]); [mutableRet release]; return ret; I don't see why your NSLog line should cause a problem, but your memory management at the end of the function is wrong, so may have a bearing on it. Why copy mutableRet when you just release it anyway? Instead, just return it with an autorelease: return [mutableRet autorelease]; There is no need to copy a mutable array just so you can return it as a non-mutable array - it is an array and its mutability is invisible to the client of this code. As it stands you're leaking the copy because it is never released. --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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSRunLoop vs. NSThread sleep
On Wed, Apr 29, 2009 at 6:53 AM, Alastair Houghton alast...@alastairs-place.net wrote: On 29 Apr 2009, at 11:44, Kyle Sluder wrote: On Wed, Apr 29, 2009 at 6:00 AM, Alastair Houghton alast...@alastairs-place.net wrote: But all of this is somewhat academic in a way, because Apple has handily provided NSOperationQueue for you which is probably what you should be using unless you have some backwards compatibility requirement or some other requirement that NSOperationQueue doesn't satisfy. NSOperationQueue is broken: http://www.mikeash.com/?page=pyblog/dont-use-nsoperationqueue.html Yes, it is, though I was under the impression that not everyone was seeing problems with it. However, given the simpler sample program Mike put in the comments, it does look pretty borked to me. It appears that the reason not everybody can reproduce the problem is because the bug is hardware-dependent. Thus this fact won't save you unless your code won't ever escape your machine (or 10.5.7 fixes it, or you only support 10.6 and that fixes it). Anyway, there's always http://www.rogueamoeba.com/utm/2008/12/01/raoperationqueue-an-open-source-replacement-for-nsoperationqueue/ (for instance). Note that although this is of course the best code ever (ahem) it is not equally capable compared to NSOperationQueue. (It mostly does less, but has some extra capabilities as well.) However for what the poster is after it's probably a good fit, since it's basically a fancy worker thread. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: It doesn't work without the NSLog()... Why?
Why copy mutableRet when you just release it anyway? Instead, just
return it with an autorelease:
I do that because i return an immutable array. I always try to return
the types i promise to return in the declaration :)
To Kyle:
I looked at the -
intoArray:addItemFromTable:usingStatement:andSearchString:, but i
failed to find anything bad in there. Here is the code:
- (void) intoArray:(NSMutableArray *)mutableRet addItemFromTable:
(NSString *)table usingStatement:(sqlite3_stmt *)statement
andSearchString:(NSString *) searchString {
sqlite3_bind_text(statement, 1, [searchString
cStringUsingEncoding:NSUTF8StringEncoding], -1, SQLITE_TRANSIENT);
while (sqlite3_step(statement) == SQLITE_ROW) {
NSString *s = [NSString stringWithUTF8String:(char *)
sqlite3_column_text(statement, 0)];
int wid = sqlite3_column_int(statement, 1);
[mutableRet addObject:[WordIdAndDatabase makeWithId:wid word:s
andDatabaseName:table]];
}
}
And here is some more detailed description of the problem. The thing
is that i have a class called Database which is responsible for
communicating with my database. The Database class is controlled by a
DatabaseManager, which is a singleton... Any object in my application
wanting to get anything from the db calls the [DatabaseManager
sharedManager] and calls the methods it needs to call.
As I may have mentioned before, the app I am writing is a dictionary.
The user interface has an NSTableView and an NSTextField. As the user
types a searchword into the textfield, the app creates new
NSOperations that select the words beginning with the chars the user
has typed, from the database, and then i show them in the table view.
Again, all the interactions with the db are executed via the
DatabaseManager.
When the user hits enter or clicks on a cell with a word in it, we
select that word with the equivalent from the db and display that in a
different window.
And the thing is that when the NSLog line we talked above is not
there, the -selectWordsBeginningWith: method works fine only until the
user presses Enter or clicks a cell, i.e. until we get another class
connect to the database.
Again, with NSLog in place, it all works fine no mater how many
translations you open...
I would be really grateful for any hints to what the cause might be.
On Apr 29, 2009, at 4:32 PM, Graham Cox wrote:
On 29/04/2009, at 10:05 PM, Тимофей Даньшин wrote:
NSArray *ret = [mutableRet copy];
// NSLog(@The number of items to be returned is: %i, [ret count]);
[mutableRet release];
return ret;
I don't see why your NSLog line should cause a problem, but your
memory management at the end of the function is wrong, so may have a
bearing on it.
Why copy mutableRet when you just release it anyway? Instead, just
return it with an autorelease:
return [mutableRet autorelease];
There is no need to copy a mutable array just so you can return it
as a non-mutable array - it is an array and its mutability is
invisible to the client of this code. As it stands you're leaking
the copy because it is never released.
--Graham
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Re: It doesn't work without the NSLog()... Why?
2009/4/29 Тимофей Даньшин ok5.ad...@gmail.com: Hello. It's a very funny thing. And i do hope i am not bonkers. But the following code works fine until i delete the line with NSLog(). In the latter case it just returns an empty array. Are there any sane reasons why that can happen? Does it break if you delete the NSLog and run it in the debugger? If so, step through the code until you find the place where it's going wrong, and fix it. Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: It doesn't work without the NSLog()... Why?
On 29/04/2009, at 10:48 PM, Тимофей Даньшин wrote: Why copy mutableRet when you just release it anyway? Instead, just return it with an autorelease: I do that because i return an immutable array. I always try to return the types i promise to return in the declaration :) Even so, you're leaking the copy because it should be returned autoreleased, as per correct memory management rules. The fact that you're not doing this here suggests that memory management may be flaky elsewhere, as Kyle suggested. However, returning the mutable array when your method promises a non- mutable array is perfectly OK. NSMutableArray is an NSArray and therefore the method has fulfilled its contract. If the client code then tests its class and discovers that it is in fact mutable after all, and mutates it, then the client code is the bad guy here. All the copy does is waste time, and serves no purpose. Still, if it makes you feel better... Note that: - (NSArray *) selectWordsBeginningWith:(NSString *) s; Does not include the word new, alloc, copy or mutableCopy and therefore the caller does not own the array returned. --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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iphone SDK session duration
I did reply. Moderator on this list rejected because my reply is too long. I was about to report the results. I get it to work. I open source the Xcode project code on google project if anyone want it. On Wed, Apr 29, 2009 at 12:57 AM, Alexander Spohr a...@freeport.de wrote: Luke already told you six hours before your post: Am 29.04.2009 um 02:10 schrieb Bess Ho: *** -[NSObject timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x521fe0 2009-04-28 17:07:32.283 sessiontime[22584:20b] CoreAnimation: ignoring exception: *** -[NSObject timeIntervalSinceReferenceDate]: unrecognized selector sent to instance 0x521fe0 You are asking an NSObject for timeIntervalSinceReferenceDate. You need an NSDate. Your variable named now is NOT an NSDate. atze -- Bess Ho ___ 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 to set keyboard focus to in NSView in Carbon Application?
I create a custom NSView in my Carbon Application. For embed it into Carbon window, i create a HICocoaview for it. My question is: How to set keyboard focus to the NSView? I can get the focus after i mouse click the NSView. I try to set focus by SetKeyboardFocus( windowRef, pHICocoaView, kControlFocusNextPart ). But it doesn't work. HIViewRef pHICocoaView; NSView* pView = [[MyCustomNSView alloc] initWith: this]; HICocoaViewCreate(pView, 0, pHICocoaView); HIViewAddSubview(pContentView, mpHICocoaView); Thanks for you help. Sincerely , Bruce ___ 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: Getting Display Names
Perfect! Thank you. Is this documented anywhere? Not even IORegistryExplorer appears to display this dictionary. There is no technote documenting the procedure, but both IODisplayCreateInfoDictionary and CGDisplayIOServicePort are in public headers, so it is safe to use. ___ 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 is NSString-FSRef so hard?
On Apr 28, 2009, at 1:34 AM, Erg Consultant wrote:
if( glBundle ) {
// Get main bundle info dict...
d = [ glBundle infoDictionary ];
if( d ) {
// Get the GL bundle's path from the info dict...
z = [ d objectForKey:kNSBundleInitialPathInfoDictKey ];
if( z ) {
// Break the path up into a path component array...
arr = [ z
componentsSeparatedByString:kSlashStringKey ];
// Make a mutable path string to manipulate...
m = [ NSMutableString stringWithCapacity:0 ];
}
}
}
if( m arr ){
for(i=0; i[ arr count] - 1; i++ ) {
[m appendString:[arr objectAtIndex:i] ];
[m appendString:@/ ];
}
//go up one level to get at Info.plist
[m appendString:@Info.plist ];
dd = [ NSDictionary dictionaryWithContentsOfFile:m ];
zzz = [ dd valueForKey:@CFBundleExecutable ];
//reset
[ m setString:@ ];
//Loop again appening all path compoents to final file to
launch...
for(i=0; i[ arr count] - 1; i++ ) {
[m appendString:[arr objectAtIndex:i] ];
[m appendString:@/ ];
}
//now get full path to the file we want to actually run...
[ m appendString:zzz ];
[ m appendString:@.ifn ];
Wow, you are making this problem way, way harder than it needs to
be. ;-)
If you are working with file paths, you shouldn't be using
componentsSeparatedByString:, nor should you be defining / to be the
component you should be separating by. What if someone had your app
inside of a folder they named Apps/Utilities? The HFS+ filesystem
actually uses a colon as the path separator, so having a / in the name
of a file or folder is perfectly acceptable, but would likely cause a
headache and unexpected results if your code were to encounter it. (Go
to the Finder and try adding a /).
When dealing with file paths, you should be using the following methods:
+ (NSString *)pathWithComponents:(NSArray *)components;
- (NSArray *)pathComponents;
- (NSString *)lastPathComponent;
- (NSString *)stringByDeletingLastPathComponent;
- (NSString *)stringByAppendingPathComponent:(NSString *)str;
- (NSString *)pathExtension;
- (NSString *)stringByDeletingPathExtension;
- (NSString *)stringByAppendingPathExtension:(NSString *)str;
- (NSString *)stringByStandardizingPath;
Note that these aren't in the NSString.h header itself, but in a
separate NSPathUtilities.h file.
Using these higher-level commands will insulate you from even having
to worry about what the path separator even is (it will be handled for
you). The same goes for adding a filename extensions: [fileName
stringByAppendingString:@.jpg] should be [fileName
stringByAppendingPathExtension:@jpg].***
Hope this helps,
Mark
*** Adobe developers, this means you! Maybe then I wouldn't have a
folder in my user library folder whose name is Application Support/
Adobe/Acrobat.
---
Mark Douma
Grand Rapids, MI, USA
mdoum...@mac.com
http://homepage.mac.com/mdouma46/
---
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Localizing Without Xcode UI
I'm adding localized nibs in Xcode 3.1 by Get Info... on the nib, and clicking Add Localization... this is working as expected but rather slow. Is there a faster way? Michael ___ 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: It doesn't work without the NSLog()... Why?
On 29/04/2009, at 10:48 PM, Тимофей Даньшин wrote:
- (void) intoArray:(NSMutableArray *)mutableRet addItemFromTable:
(NSString *)table usingStatement:(sqlite3_stmt *)statement
andSearchString:(NSString *) searchString {
Also, I don't mean to pick on your code (there's nothing obviously
wrong with what you've posted so far apart from the leak I mentioned
already), but as a matter of style, this way of designing methods is a
bit strange. In the interests of being as self-contained and clean as
possible, I'd rearrange this method something like this:
- (NSArray*) itemsFromTableWithName:(NSString*) table sqlStatement:
(sqlite3_stmt*) statement searchString:(NSString*) searchString;
This way the method stands alone with a fully defined and self-
documenting purpose that can be called by anyone without having first
to create a NSMutableArray to pass into it. If they want to accumulate
the results into a further array, then fine, do that; if they don't,
they haven't had to create an array just to keep your code happy.
There are also fewer failure modes, because this code is responsible
for creating the returned array, and not relying on the client to do
so. It's also easier for the client to detect success or failure,
because a returned empty or nil array could mean something. In your
case, the client would have to examine the contents of the array
before and after to figure out if anything had actually happened.
This design is widely seen throughout the Cocoa frameworks, whereas
the intoArray: type thing you have I don't think I've ever seen. It's
usually a good plan to follow the approaches used in the frameworks,
they are for good reason.
--Graham
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Re: Crashing resetting or releasing an NSManagedObjectContext
On Apr 29, 2009, at 2:59 AM, Daniel Kennett wrote: Different combinations of trying to do this right result in crashes at different points. Leaving out [context reset] and just releasing it obviously gives EXC_BAD_ACCESS again. Autoreleasing the MOC in +petAtURL: causes crashes when the autorelease pool pops. The only way I can get it to not crash is to -init the MOC and never release or autorelease it, but that's causing memory leaks! The most common cause if this error is an over-release. Turn on zombies and see who (if any) is being over-released. The culprit could be in your copy data code, that you don't provide. There doesn't seem to be anything obviously wrong (other than explained below), that I can see. Is there a good example anywhere of how to set up and tear down a Core Data document correctly? I can say that the design you present is flawed according to OOP rules, specifically how you release the managed object context. An object should never release an object it doesn't own or has retained. I understand why you are doing this--I am just saying it is a flawed approach. I don't know what the KNClarusQuickDocumentParser class does in its entirety, but it may call for a singleton pattern or at least a shared object pattern (not a proper pattern name AFAIK, just mentioning the technique, for instance, [NSNotificationCenter defaultCenter]). Tear down, in your case, should be as simple as releasing the MOC. The other calls (-reset etc) are unnecessary. Keary Suska Esoteritech, Inc. Demystifying technology for your home or business ___ 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 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 ___ 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: Crashing resetting or releasing an NSManagedObjectContext
Daniel,
You are trying to fetch an object and keep it - but you want to
ignore / throw away the NSManagedObjectContext. This will never work.
The NSManagedObjectContext keeps the object. Your Pet can not exist
without its NSManagedObjectContext.
You should let the caller provide a NSManagedObjectContext and fetch
your Pet into that context. Make it the callers responsibility to get
a NSManagedObjectContext not yours.
+ (Pet *)petAtURL:(NSURL *)url inContext:(NSManagedObjectContext
*)aManagedObjectContext
Or copy the pet into something like an NSDictionary and return that.
atze
Am 29.04.2009 um 10:59 schrieb Daniel Kennett:
Hi list,
I'm hoping you guys can help me. I'm loading up a Core Data store,
copying some data out and attempting to clear it all up. I use this
code for my Quicklook plugin, and in parts of my app for previewing
documents in a more advanced manner than Quicklook provides.
This is how I set up my ManagedObjectContext:
+(Pet *)petAtURL:(NSURL *)url {
NSManagedObjectModel *managedObjectModel =
[KNClarusQuickDocumentParser managedObjectModel];
NSPersistentStoreCoordinator *coordinator =
[[[NSPersistentStoreCoordinator alloc]
initWithManagedObjectModel:managedObjectModel] autorelease];
[coordinator addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:url
options:nil
error:error];
NSManagedObjectContext *moc = [[NSManagedObjectContext alloc] init];
// ^ Not Autoreleasing here. It's the responsibility of the
caller to release the MOC. Autoreleasing causes crashes.
[moc setPersistentStoreCoordinator:coordinator];
[[moc undoManager] disableUndoRegistration];
NSError *fetchError = nil;
NSArray *fetchResults;
NSFetchRequest *fetchRequest = [[[NSFetchRequest alloc] init]
autorelease];
NSEntityDescription *entity = [NSEntityDescription
entityForName:@Pet
inManagedObjectContext:moc];
[fetchRequest setEntity:entity];
fetchResults = [moc executeFetchRequest:fetchRequest
error:fetchError];
if ((fetchResults != nil) ([fetchResults count] == 1)
(fetchError == nil))
{
NSManagedObject *pet = [[fetchResults objectAtIndex:0] retain];
return [pet autorelease];
}
return nil;
}
And this is how I get the data out and release it:
Pet *pet = [KNClarusQuickDocumentParser petAtURL:url];
// Copy out some data.
NSManagedObjectContext *context = [pet managedObjectContext];
if (context) {
[context reset]; // This call results in EXC_BAD_ACCESS
[context setPersistentStoreCoordinator:nil];
[context release];
}
return [dict autorelease];
End code
Different combinations of trying to do this right result in crashes
at different points. Leaving out [context reset] and just releasing
it obviously gives EXC_BAD_ACCESS again. Autoreleasing the MOC in
+petAtURL: causes crashes when the autorelease pool pops. The only
way I can get it to not crash is to -init the MOC and never release
or autorelease it, but that's causing memory leaks!
Is there a good example anywhere of how to set up and tear down a
Core Data document correctly?
Thanks,
-- Daniel
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http://www.kennettnet.co.uk
Please include previous messages in any reply you send.
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NSTableView: Type selecting in one column but not another
I was wondering if it was possible to get finer control over what type selecting searches in a row. I have two columns in my table which both contain text. It only makes sense to match what the user is typing to the text found in the first column. Unfortunately, I cannot seem to find a way to disable type selection on the second column. It seems to be an all-or-nothing feature. I am certain I could handle this myself by disabling the feature and then modifying the key down method to do the right thing, but was hoping I had missed something. ___ 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: Type selecting in one column but not another
On Wed, Apr 29, 2009 at 11:43 AM, Eric Gorr mail...@ericgorr.net wrote: I was wondering if it was possible to get finer control over what type selecting searches in a row. I have two columns in my table which both contain text. It only makes sense to match what the user is typing to the text found in the first column. Unfortunately, I cannot seem to find a way to disable type selection on the second column. It seems to be an all-or-nothing feature. Have you read the documentation? The -tableView:typeSelectStringForTableColumn:row: method documentation says: Return Value A string that is used in type select comparison for row and tableColumn. Return nil if the row or tableColumn should not be searched. -- I.S. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: NSTableView: Type selecting in one column but not another
On Apr 29, 2009, at 10:43 AM, Eric Gorr wrote: I was wondering if it was possible to get finer control over what type selecting searches in a row. I have two columns in my table which both contain text. It only makes sense to match what the user is typing to the text found in the first column. Unfortunately, I cannot seem to find a way to disable type selection on the second column. It seems to be an all-or-nothing feature. I am certain I could handle this myself by disabling the feature and then modifying the key down method to do the right thing, but was hoping I had missed something. Implement -tableView:typeSelectStringForTableColumn:row: on your delegate and only return a value for the columns you're interested in having type select work with. Ashley ___ 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: Type selecting in one column but not another
On Apr 29, 2009, at 12:05 PM, Ashley Clark wrote: On Apr 29, 2009, at 10:43 AM, Eric Gorr wrote: I was wondering if it was possible to get finer control over what type selecting searches in a row. I have two columns in my table which both contain text. It only makes sense to match what the user is typing to the text found in the first column. Unfortunately, I cannot seem to find a way to disable type selection on the second column. It seems to be an all-or-nothing feature. I am certain I could handle this myself by disabling the feature and then modifying the key down method to do the right thing, but was hoping I had missed something. Implement -tableView:typeSelectStringForTableColumn:row: on your delegate and only return a value for the columns you're interested in having type select work with. Ah. Thank you. Don't know how I missed that. ___ 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: Group Identity Programming
The third thing I tried is getting the gid using: gid_t curGroupID = getgid(); OR int curGroupID = getgid(); CBGroupIdentity *groupIdentity = [CBGroupIdentity groupIdentityWithPosixGID:curGroupID authority:[CBIdentityAuthority defaultIdentityAuthority]]; When I try to show the gid using NSLog, it hangs the program. When I show the groupIdentity object, it returns (null). The above is better. What does the debugger show for curGroupID? There is no reason to hang on NSLog if for curGroupID, as it is really juts an unsigned int. What is the NSLog code you are using? Thank you for your help! The reason NSLog was hanging is that I was using the wrong formatting token. When I use: NSLog(@current group id: %i, curGroupID); I get current group id: 1612776775, which I'm assuming is right. However, I am still getting Current group info: (null) when I do: CBGroupIdentity *groupIdentity = [CBGroupIdentity groupIdentityWithPosixGID:curGroupID authority:[CBIdentityAuthority defaultIdentityAuthority]]; NSLog(@Current group info: %@, groupIdenditity); Unfortunately, I don't know if solving this problem will solve my ultimate problem (although I'm sure it will help!). My ultimate problem is that I have a number of group identities chosen by the identity picker. I need to look at their member lists and see if the logged-in user is in any of those lists. What I can't figure out is how to get access to the member lists of the groups that I get using the identity picker. I think this has to do with the fact that the identity picker returns CBIdentity objects, but how would one make a CBGroupIdentity object using the information from the CBIdentity object for a particular group identity? The only way I can see to make a CBGroupIdentity object is using the above code, but as the documentation says: The getgid() function returns the real group ID of the calling process ... The real group ID is specified at login time. The real group ID is the group of the user who invoked the program. What group is this referring to? If I made a local test_group and put the user in that, would it be the gid of test_group? What if the user is an many groups, both local and managed? This is the heart of my problem. ___ 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 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 [SOLVED]
On Apr 29, 2009, at 9:31 AM, Chris Tracewell wrote:
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];
}
This is not a fully correct solution. Your code as-is will leak lots
of memory (unless you are creating a GC app, in which case it won't
have good performance due to creating too many cells). You probably
want to use -willDisplayCell to reset or properly setup your state for
the cells.
-corbin
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NSOperation, Sqlite, library routine called out of sequence
Hello again.
In short, i get an error calling the same synchronized singleton
DatabaseManager from different threads.
Here is what I am actually doing. As I was writing earlier, i am
writing a dictionary application that is supposed to show translations
for words from the database. In the main window, there is a tableview
and a textfield. As a user types a word, i create a new NSOperation
that calls the [DatabaseManager sharedManager] and calls the methods
to select all the words beginning with the letters the user has typed.
And then the tableview is filled with the words so selected.
That works ok until the user presses return to see the translation of
the word he has typed. That action also calls the [DatabaseManager
sharedManager] and calls the methods for selecting the whole article
from the db. This results in the library routine called out of
sequence error in sqlite. Selecting an article from the db worked
perfectly well when it was not called after the procedure described
above.
And when, after receiving an empty dictionary article, the user begins
typing a new word in the search textfield, nothing happens with the
tableview, and sqlite3_step function calls end with the library
routine called out of sequence error.
Here are the relevant excerpts from the classes involved.
Database:
- (NSArray *) selectWordsBeginningWith:(NSString *) s {
NSString *searchString = [NSString stringWithFormat:@%...@%@, s,
@%%];
NSMutableArray *mutableRet = [self itemsFromTable:@english
usingStatement:readEnglish andSearchString:searchString];
NSMutableArray *arr2 = [self itemsFromTable:@russian
usingStatement:readRussian andSearchString:searchString];
[mutableRet addObjectsFromArray: arr2];
sqlite3_reset(readEnglish);
sqlite3_reset(readRussian);
NSArray *ret = [[mutableRet copy] autorelease];
return ret;
}
- (NSDictionary *) selectArticleWithId: (WordIdAndDatabase *)
articleId {
sqlite3_stmt *currentOne;
if ([articleId.datbaseName isEqualToString:@english]) {
currentOne = selectArticleEnglishToRussian;
} else {
currentOne = selectArticleRussianToEnglish;
}
NSString *originalWord = articleId.word;
sqlite3_bind_int(currentOne, 1, articleId.wordId);
NSMutableArray *translations = [[NSMutableArray alloc] init];
while (sqlite3_step(currentOne) == SQLITE_ROW) {
[translations addObject:[NSString stringWithUTF8String:(char *)
sqlite3_column_text(currentOne, 0)]];
}
NSLog(@There may be an error in the db things: %s,
sqlite3_errmsg(database));
NSDictionary *ret = [NSDictionary
dictionaryWithObjectsAndKeys:originalWord, @original, translations,
@translations, nil];
[translations release];
sqlite3_reset(currentOne);
return ret;
}
- (NSMutableArray *) itemsFromTable:(NSString *)table usingStatement:
(sqlite3_stmt *)statement andSearchString:(NSString *) searchString {
NSMutableArray *mutableRet = [[[NSMutableArray alloc] init]
autorelease];
sqlite3_bind_text(statement, 1, [searchString
cStringUsingEncoding:NSUTF8StringEncoding], -1, SQLITE_TRANSIENT);
while (sqlite3_step(statement) == SQLITE_ROW) {
NSString *s = [NSString stringWithUTF8String:(char *)
sqlite3_column_text(statement, 0)];
int wid = sqlite3_column_int(statement, 1);
[mutableRet addObject:[WordIdAndDatabase makeWithId:wid word:s
andDatabaseName:table]];
}
NSLog(@There MIGHT BE an error in getting things from the db: %s,
sqlite3_errmsg(database));
return mutableRet;
}
Thank you for your attention.
Timofey.
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Re: NSButtonCell visibility binding in NSOutlineView
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
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Re: Group Identity Programming
On Wed, Apr 29, 2009 at 9:36 AM, Jessica Billings slaveofosi...@gmail.com wrote: What group is this referring to? If I made a local test_group and put the user in that, would it be the gid of test_group? What if the user is an many groups, both local and managed? This is the heart of my problem. Users in UNIX have a single primary group and potentially multiple secondary groups. The real gid of a user is that user's primary group, unless it's been changed by setgid. --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: Group Identity Programming
Jessica Billings wrote: My ultimate problem is that I have a number of group identities chosen by the identity picker. I need to look at their member lists and see if the logged-in user is in any of those lists. What I can't figure out is how to get access to the member lists of the groups that I get using the identity picker. I think this has to do with the fact that the identity picker returns CBIdentity objects, but how would one make a CBGroupIdentity object using the information from the CBIdentity object for a particular group identity? CBGroupIdentity is a subclass of CBIdentity. So in the NSArray of CBIdentity items returned from the identity picker, you test whether each item is a CBGroupIdentity or not using the normal Objective-C mechanism: [someItem isKindOfClass:CBGroupIdentity] Once you've identified a CBGroupIdentity, then type-cast it to (CBGroupIdentity*). Then test whether the CBIdentity of the current user is a member of that group using the -members method and searching the resulting NSArray. The search should be recursive, since I saw nothing prohibiting nested membership, only a prohibition against circular membership. Of course, if the array of CBIdentity's from the identity picker doesn't contain any groups, then the user isn't going to be a member of any of them, and you search the identity picker's NSArray for CBIdentity presence. If that sounds like a recursive search of a group's -members NSArray, it is. To me, the problem doesn't seem to have anything to do with group identity per se. It seems to hinge entirely on the subclass/ superclass relationship, and identifying specific subclass types. It's possible I've made an error in the above. I only spent a few minutes reading the class docs and Identity Services Programming Guide, and without looking any further, this seems like the simplest thing that might work. -- GG ___ 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: CA -animator animation only works the first time
On Tue, Apr 28, 2009 at 02:49:23PM -0700, Erg Consultant wrote: I have two standard Cocoa objects in my window that I animate using CA's AppKit -animator method. When my nib loads, I get the original NSRects of the two items by sending them the -frame message. I then recalc the rects to move the two views offscreen. When I show my window, I animate both views back into the window thusly: [ [ oudWindowIconView animator ] setFrame:destGameIconRect ]; [ [ oudWinowLogoImage animator ] setFrame:destLogoRect ]; This works fine - the first time. The next time I show my window and the same code runs, the two items are not visible in the window. The dest rects of the reanimated views are the same as the original view rects when the nib loads. So why does the animation work only the first time? -awakeFromNib will only be called once, when the window is loaded from the NIB. You need to reset the view positions in the code that actually displays the window. -Ben ___ 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: NSOperation, Sqlite, library routine called out of sequence
Тимофей Даньшин wrote: In short, i get an error calling the same synchronized singleton DatabaseManager from different threads. Are you sure your database accesses are synchronized (i.e. thread- safe)? I see nothing in the posted code that uses @synchronized or any other locking mechanism. -- GG ___ 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: NSOperation, Sqlite, library routine called out of sequence
The DatabaseManager is synchronized. If any class is to communicate
with the db, it does that through the DatabaseManager. The latter just
provides proxy methods. I think, that should result in classes getting
the instance of the DatabaseManager only when it is no longer (or not
yet) used by other classes.
+ (DatabaseManager*)sharedManager {
@synchronized(self) {
if (sharedDatabaseManager == nil) {
[[self alloc] init]; // assignment not done here
}
}
return sharedDatabaseManager;
}
+ (id)allocWithZone:(NSZone *)zone {
@synchronized(self) {
if (sharedDatabaseManager == nil) {
sharedDatabaseManager = [super allocWithZone:zone];
[sharedDatabaseManager initDb];
return sharedDatabaseManager;
}
}
return nil;
}
On Apr 29, 2009, at 10:52 PM, Greg Guerin wrote:
Тимофей Даньшин wrote:
In short, i get an error calling the same synchronized singleton
DatabaseManager from different threads.
Are you sure your database accesses are synchronized (i.e. thread-
safe)? I see nothing in the posted code that uses @synchronized or
any other locking mechanism.
-- GG
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Re: NSOperation, Sqlite, library routine called out of sequence
Тимофей Даньшин wrote: The DatabaseManager is synchronized. If any class is to communicate with the db, it does that through the DatabaseManager. The latter just provides proxy methods. I think, that should result in classes getting the instance of the DatabaseManager only when it is no longer (or not yet) used by other classes. But that does nothing to prevent multiple threads from performing additional concurrent actions on the database. It's not enough to just control access to the shared singleton, if the actions performed by the singleton aren't also thread-safe. All the queries, updates, etc. need thread-safety, too. -- GG ___ 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: NSOperation, Sqlite, library routine called out of sequence
Hm... That really works! Thanks a lot. Putting the bodies of those methods in @synchronized(self) blocks helped Thanks a lot again. On Apr 29, 2009, at 11:33 PM, Greg Guerin wrote: Тимофей Даньшин wrote: The DatabaseManager is synchronized. If any class is to communicate with the db, it does that through the DatabaseManager. The latter just provides proxy methods. I think, that should result in classes getting the instance of the DatabaseManager only when it is no longer (or not yet) used by other classes. But that does nothing to prevent multiple threads from performing additional concurrent actions on the database. It's not enough to just control access to the shared singleton, if the actions performed by the singleton aren't also thread-safe. All the queries, updates, etc. need thread-safety, too. -- GG ___ 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/ok5.admin%40gmail.com This email sent to ok5.ad...@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: Binding question
On Apr 28, 2009, at 5:09 AM, Arun wrote: For the first table i have used the an array in my controller and this array has been set as content array in the ArrayController object. Now when i double click in need to bind the table in the sheet to the the subjectDetails array. I am not able to figure out how to set the binding for the second table. Any ideas? You need a second array controller. Its content should be bound to the first array controller, with controller key selection, and model key path subjectDetails. You bind the table columns in the detail view (the sheet) to this second array controller. Look up master-detail interface in Apple's guides for more in-depth description of this technique. There are also some examples here: http://homepage.mac.com/mmalc/CocoaExamples/controllers.html 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
Re: Group Identity Programming
On Apr 29, 2009, at 7:36 AM, Jessica Billings wrote: The third thing I tried is getting the gid using: gid_t curGroupID = getgid(); OR int curGroupID = getgid(); CBGroupIdentity *groupIdentity = [CBGroupIdentity groupIdentityWithPosixGID:curGroupID authority:[CBIdentityAuthority defaultIdentityAuthority]]; When I try to show the gid using NSLog, it hangs the program. When I show the groupIdentity object, it returns (null). The above is better. What does the debugger show for curGroupID? There is no reason to hang on NSLog if for curGroupID, as it is really juts an unsigned int. What is the NSLog code you are using? Thank you for your help! The reason NSLog was hanging is that I was using the wrong formatting token. When I use: NSLog(@current group id: %i, curGroupID); I get current group id: 1612776775, which I'm assuming is right. However, I am still getting Current group info: (null) when I do: That is certainly an odd GID, but I suppose it could be. Leopard changed everything again, so who knows. Anyway, remember that there is no correspondence between the Unix user/group management and the Mac OS X system user management. It is possible that the Unix-based means of acquiring UIDs and GIDs doesn't work with the Mac's way of doing things. Check your values against what you expect them to be. To get the UID and GID for a user, right-click on the user in the system accounts pane (system prefs), choosing advanced options. I would also check the getuid() call and see if it returns the expected UID. This will tell you whether the C calls know about Mac user handling. CBGroupIdentity *groupIdentity = [CBGroupIdentity groupIdentityWithPosixGID:curGroupID authority:[CBIdentityAuthority defaultIdentityAuthority]]; NSLog(@Current group info: %@, groupIdenditity); Unfortunately, I don't know if solving this problem will solve my ultimate problem (although I'm sure it will help!). My ultimate problem is that I have a number of group identities chosen by the identity picker. I need to look at their member lists and see if the logged-in user is in any of those lists. What I can't figure out is how to get access to the member lists of the groups that I get using the identity picker. I think this has to do with the fact that the identity picker returns CBIdentity objects, but how would one make a CBGroupIdentity object using the information from the CBIdentity object for a particular group identity? The only way I can see to make a CBGroupIdentity object is using the above code, but as the documentation If the getgid/getuid functions don't work, I don't know what to tell you. You could try digging into the new user management system (man dscl), or NSTask to the id utility (man id). HTH, Keary Suska Esoteritech, Inc. Demystifying technology for your home or business ___ 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: File Reading Problems
On Apr 28, 2009, at 9:19 PM, Pierce Freeman wrote:
- (void)awakeFromNib
{
NSFileHandle *remoteConnection = [NSFileHandle
fileHandleForReadingAtPath:@/Users/user/Desktop/file.plist];
The above does not promise to keep the NSFileHandle object around for
as long as you need it. It's not at all clear to me that -
readToEndOfFileInBackgroundAndNotify retains the file handle for its
duration.
So, you need to manage the lifetime of the file handle by retaining it
here and releasing it when you know you're done with it.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(readAllTheData:)
name:NSFileHandleReadToEndOfFileCompletionNotification
object:remoteConnection];
[remoteConnection readToEndOfFileInBackgroundAndNotify];
}
- (void)readAllTheData:(NSNotification *)note {
NSString *errors = nil;
NSData *contentsOfDockFile = [note object];
NSLog(@%@, contentsOfDockFile);
NSDictionary *testing = [NSPropertyListSerialization
propertyListFromData:contentsOfDockFile
mutabilityOption:NSPropertyListImmutable format:nil
errorDescription:errors];
NSLog(@%@, testing);
[[NSNotificationCenter defaultCenter] removeObserver:self
name:NSFileHandleReadToEndOfFileCompletionNotification object:[note
object]];
[testing release];
}
On Apr 28, 2009, at 10:15 PM, Pierce Freeman wrote:
I added [testing retain] after the declaration of
the variable, and I no longer get the wheel of death and my app
freezing up.
This smacks of flailing without understanding.
The problem with your original code is that -propertyListFromData:...
gives you an object, but does not give you the right/responsibility
for releasing it, and yet you were releasing it anyway.
While it is technically correct to solve this by adding [testing
retain], it is redundant. You could have just removed your [testing
release]. The object is guaranteed to live at least until you return
out of your -readAllTheData: method, so you need not retain it. And,
if you don't retain it, you should not release it.
All this is to concur with Adam's suggestion that you reread the
memory management guide.
Regards,
Ken
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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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Re: Core Data Fetches + Transient Properties + NSPredicateEditor = Sadness
Thanks to Kyle and Melissa for the further explanation.
So, I thought about it some more and agree with you that putting a few
redundant bits on the disk is not sinful, and actually I am a fan of
keyPathsForValuesAffectingValueForkey. Look at the little script I
have in my Xcode scripts menu! [1]
But the other issue -- the inability of a Core Data fetch to handle
arbitrary predicates produced by NSPredicateEditor -- weighs heavily
against Core Data fetches. I made my own simple predicate editor
control a few years ago, but of course it is a pile of garbage
compared to NSPredicateEditor, and I just can't go back to 2006 now.
So I still plan to use NSPredicateEditor, fetch all and filter with -
[NSArray filteredArrayWithPredicate:].
I have used sqlite3 directly myself and don't recall any limitation on
the number of ALL, ANY or IN clauses. If there is not, then maybe
Apple would be responsive to a enhancement/bug report on Core Data
fetches not being able to handle predicates from NSPredicateEditor.
And if I'm lucky Apple will fix it before any of my users has a data
set large enough to require hard disk access during a search :)
Jerry
[1] Script for coding +keyPathsForValuesAffecting...
#!/bin/sh
echo + (NSSet*)keyPathsForValuesAffecting {
echo return [NSSet setWithObjects:
echo @\\,
echo nil] ;
echo }
echo
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Re: File Reading Problems
Hey Ken:
Your advice is really appreciated, and I will definitely look over the
Memory Management Guidelines when I have a bit more time in my day. ;)
On 4/29/09 1:12 PM, Ken Thomases k...@codeweavers.com wrote:
On Apr 28, 2009, at 9:19 PM, Pierce Freeman wrote:
- (void)awakeFromNib
{
NSFileHandle *remoteConnection = [NSFileHandle
fileHandleForReadingAtPath:@/Users/user/Desktop/file.plist];
The above does not promise to keep the NSFileHandle object around for
as long as you need it. It's not at all clear to me that -
readToEndOfFileInBackgroundAndNotify retains the file handle for its
duration.
So, you need to manage the lifetime of the file handle by retaining it
here and releasing it when you know you're done with it.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(readAllTheData:)
name:NSFileHandleReadToEndOfFileCompletionNotification
object:remoteConnection];
[remoteConnection readToEndOfFileInBackgroundAndNotify];
}
- (void)readAllTheData:(NSNotification *)note {
NSString *errors = nil;
NSData *contentsOfDockFile = [note object];
NSLog(@%@, contentsOfDockFile);
NSDictionary *testing = [NSPropertyListSerialization
propertyListFromData:contentsOfDockFile
mutabilityOption:NSPropertyListImmutable format:nil
errorDescription:errors];
NSLog(@%@, testing);
[[NSNotificationCenter defaultCenter] removeObserver:self
name:NSFileHandleReadToEndOfFileCompletionNotification object:[note
object]];
[testing release];
}
On Apr 28, 2009, at 10:15 PM, Pierce Freeman wrote:
I added [testing retain] after the declaration of
the variable, and I no longer get the wheel of death and my app
freezing up.
This smacks of flailing without understanding.
The problem with your original code is that -propertyListFromData:...
gives you an object, but does not give you the right/responsibility
for releasing it, and yet you were releasing it anyway.
While it is technically correct to solve this by adding [testing
retain], it is redundant. You could have just removed your [testing
release]. The object is guaranteed to live at least until you return
out of your -readAllTheData: method, so you need not retain it. And,
if you don't retain it, you should not release it.
All this is to concur with Adam's suggestion that you reread the
memory management guide.
Regards,
Ken
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Re: virtual keycode to character
ken, thank you. this solved my problem. and for the archives (to help anyone in the future), here is my code: UInt32 deadKeyState = 0; UniCharCount actualCount = 0; UniChar baseChar; TISInputSourceRef sourceRef = TISCopyCurrentKeyboardLayoutInputSource(); CFDataRef keyLayoutPtr = (CFDataRef)TISGetInputSourceProperty( sourceRef, kTISPropertyUnicodeKeyLayoutData); CFRelease( sourceRef); UCKeyTranslate( (UCKeyboardLayout*)CFDataGetBytePtr(keyLayoutPtr), [theEvent keyCode], kUCKeyActionDown, 0, LMGetKbdLast(), kUCKeyTranslateNoDeadKeysBit, deadKeyState, 1, actualCount, baseChar); ken p.s. i realize this might have a bug if the unicode for the unmodified keyboard character is more than 1 unicharacter. At 9:53 PM -0500 4/27/09, Ken Thomases wrote: On Apr 27, 2009, at 7:46 PM, kvic...@pobox.com wrote: in my app, i allow the user to specify keyboard shortcuts for menu items (in a manner similar to xcode). for the string passed to -[MenuItem setKeyEquivalent], i pass the string obtained from the current event via [NSEvent charactersIgnoringModifiers]. this works fine almost all the time. however, for some keyboard presses it doesn't work properly, namely for shift and some of the number keys, eg., command-! (command exclamation mark) doesn't work as a keyboard equivalent, but shift-command-1 (shift command one) does work. thus, i would like a reliable way to go from virtual keycode to the non-shifted character. in searching the archives, this topic has come up several times, but all proposed solutions that i've found make use of one or more deprecated (in leopard) api calls. eg., LMGetKBDType or GetScriptManagerVariable, etc. does anyone have a solution that doesn't rely on any deprecated api calls? You can use TISCopyCurrentKeyboardLayoutInputSource to get the current keyboard input source. Then, you can query it using TISGetInputSourceProperty with kTISPropertyUnicodeKeyLayoutData to get the 'uchr' data for that keyboard layout. With that, you can call UCKeyTranslate. By the way, LMGetKbdType is not deprecated, at least according to its declaration in the headers. It is documented on a page which is, as a whole, marked as a legacy document. However, I don't know of a way to obtain the keyboard type otherwise (except in the context of a Carbon event). 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
Re: virtual keycode to character
On Apr 29, 2009, at 6:40 PM, kvic...@pobox.com wrote: thank you. this solved my problem. You're welcome. I'm glad I could help. and for the archives (to help anyone in the future), here is my code: UInt32 deadKeyState = 0; UniCharCount actualCount = 0; UniChar baseChar; TISInputSourceRef sourceRef = TISCopyCurrentKeyboardLayoutInputSource(); CFDataRef keyLayoutPtr = (CFDataRef)TISGetInputSourceProperty( sourceRef, kTISPropertyUnicodeKeyLayoutData); CFRelease( sourceRef); UCKeyTranslate( (UCKeyboardLayout*)CFDataGetBytePtr(keyLayoutPtr), [theEvent keyCode], kUCKeyActionDown, 0, LMGetKbdLast(), Why LMGetKbdLast rather than LMGetKbdType? I think that the Last in LMGetKbdLast means former. That is, if the keyboard is switched at some point, then LMGetKbdType gives the current keyboard type and LMGetKbdLast gives the previous keyboard type. kUCKeyTranslateNoDeadKeysBit, deadKeyState, 1, actualCount, baseChar); 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
Changing CoreData store type
Howdy all, Hopefully this is a ridiculously simple question with a ridiculously simple answer, but I just haven't been able to find it. I have a document based CoreData app and I want to change the store type of the file. So it previously saved as XML, and I now want those docs to save as SQLite. But, i still want to be able to view the XML based docs, just require the user to re-save as SQLite. There are no changes to the model. All the data looks and is structured the same. So I added a new document type with a SQLite store and a different doctype and set it to editor. I left the old doc available as an editable document. At this point, I can open up an XML document, edit it, save it, and then re-save it as a SQLite document w/o any issues. The problem is when I flip the XML doc from Editor - Viewer. I can no longer save it in place (as expected), but whenever I try to save it as the SQLite doc, the app crashes. I know that it's bombing somewhere inside NSPersistentDocument's writeToURL:ofType:forSaveOperation:originalContentsURL:error:, but beyond that am lost. In the save document window, the doc type is correctly set to the new extension for the SQLite store. Again, when the app is set to editor for XML, I can re-save the doc as SQLite. When I can only view the XML docs, re-saving as SQLite crashes. I've tried all sorts of incantations with PersistentStoreCoordinator's migratePersistentStore:toURL:options:withType:error:, addPersistentStoreForURL:, removePersistentStore:error: and have gotten nowhere. I've also tried explicitly setting the document's fileType, but have had no luck. Clearly, this is something that should be easy, since the app handles it automatically when I can edit the XML docs. So what do I need to do? Many thanks in advance, -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
Scheduling a selector when a thread completes
Hi
I wrote a directory scanner application that spawns 4 different threads with
independent rescan intervals and need to repeat the process if and only if a
thread has completed a scan. Basically, for each file type I'm watching, the
process is
1. Spawn a thread to sample files of the specified type
2. Wait until the thread completes
3. Schedule another pass after a given time interval has passed.
Timer's don't work for my purposes because the execution time of the thread can
easily exceed any arbitrary repeat interval I might choose which would require
the use of busy flags and testing for a busy state etc... I want to avoid that.
I tried calling NSObject's
performSelector:(SEL) aSelector withObject:(id) anArgument afterDelay:(
NSTimeInterval ) delay
But the receiver's aSelector method is never getting called. The only
logical place to perform this scheduling is from inside the thread because only
the thread knows when it is finished, but I'm having no luck getting the method
to run.
Here are the methods that spawn the threads
- ( void ) initDirectories
{
[ NSThread detachNewThreadSelector : @selector ( initDirectoriesInThread
:)
toTarget : self
withObject : nil ];
}
- ( void ) updateDirectories
{
// Logging function that writes messages to my app's custom console view
KCLog ([ NSString stringWithFormat : @Checking for changes: %@ ,
userType]);
[ NSThread detachNewThreadSelector : @selector ( updateDirectoriesInThread
:)
toTarget : self
withObject : nil ];
}
And here are the corresponding thread methods
- ( void ) initDirectoriesInThread:( id ) inData
{
@synchronized ( self )
{
// allocate a new autorelease pool
NSAutoreleasePool *pool = [[ NSAutoreleasePool alloc ] init ];
KDirectory *rootDirectory = [ KDirectory directoryWithPath : path ];
rootObserver = [[ CNCDirectoryWatcher alloc ] initWithDirectory :
rootDirectory root : self ];
// add root directory to observed list
[ self addDirectory : rootObserver ];
// schedule a new pass
[ self performSelector : @selector ( updateDirectories ) withObject :
nil afterDelay : catalogInterval ];
// release the pool
[pool release ];
}
}
- ( void ) updateDirectoriesInThread:( id ) inData
{
@synchronized ( self )
{
// allocate a new autorelease pool
NSAutoreleasePool *pool = [[ NSAutoreleasePool alloc ] init ];
NSArray *dirs = [ directories copy ];
NSEnumerator *enumerator = [dirs objectEnumerator ];
CNCDirectoryWatcher *directory;
while (directory = [enumerator nextObject ])
{
[directory update ];
}
// schedule a new pass
[ self performSelector : @selector ( updateDirectories ) withObject :
nil afterDelay : catalogInterval ];
// release the pool
[pool release ];
}
}
The initDirectoriesInThread method is getting called and runs correctly, but
the updateDirectoriesInThread method never gets called.
I looked at
-(void)performSelectorOnMainThread:(SEL) aSelector withObject:(id) arg
waitUntilDone:(BOOL) wait
But it doesn't appear to have a way to schedule the execution for a specified
delay.
Is there a way to use performSelector: withObject: afterDelay: to satisfy both
step 2 and 3 above?
Thanks for any help
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Re: Scheduling a selector when a thread completes
* You could use NSOperationQueue and set the maximumThread count to 1.
and make for each of these methods an NSOperation. And then add those
4 operations to your OperationQueue.
* But your case is simple so you can easily code this your self by
creating an object for each operation you are performing. and create
an Operation Array
yourself.
cheers,
marc
On Apr 29, 2009, at 9:55 PM, kentoz...@comcast.net wrote:
Hi
I wrote a directory scanner application that spawns 4 different
threads with independent rescan intervals and need to repeat the
process if and only if a thread has completed a scan. Basically, for
each file type I'm watching, the process is
1. Spawn a thread to sample files of the specified type
2. Wait until the thread completes
3. Schedule another pass after a given time interval has passed.
Timer's don't work for my purposes because the execution time of the
thread can easily exceed any arbitrary repeat interval I might
choose which would require the use of busy flags and testing for a
busy state etc... I want to avoid that.
I tried calling NSObject's
performSelector:(SEL) aSelector withObject:(id) anArgument
afterDelay:( NSTimeInterval ) delay
But the receiver's aSelector method is never getting called. The
only logical place to perform this scheduling is from inside the
thread because only the thread knows when it is finished, but I'm
having no luck getting the method to run.
Here are the methods that spawn the threads
- ( void ) initDirectories
{
[ NSThread detachNewThreadSelector : @selector
( initDirectoriesInThread :)
toTarget : self
withObject : nil ];
}
- ( void ) updateDirectories
{
// Logging function that writes messages to my app's custom
console view
KCLog ([ NSString stringWithFormat : @Checking for changes:
%@ , userType]);
[ NSThread detachNewThreadSelector : @selector
( updateDirectoriesInThread :)
toTarget : self
withObject : nil ];
}
And here are the corresponding thread methods
- ( void ) initDirectoriesInThread:( id ) inData
{
@synchronized ( self )
{
// allocate a new autorelease pool
NSAutoreleasePool *pool = [[ NSAutoreleasePool alloc ] init ];
KDirectory *rootDirectory = [ KDirectory directoryWithPath :
path ];
rootObserver = [[ CNCDirectoryWatcher alloc ]
initWithDirectory : rootDirectory root : self ];
// add root directory to observed list
[ self addDirectory : rootObserver ];
// schedule a new pass
[ self performSelector : @selector ( updateDirectories )
withObject : nil afterDelay : catalogInterval ];
// release the pool
[pool release ];
}
}
- ( void ) updateDirectoriesInThread:( id ) inData
{
@synchronized ( self )
{
// allocate a new autorelease pool
NSAutoreleasePool *pool = [[ NSAutoreleasePool alloc ] init ];
NSArray *dirs = [ directories copy ];
NSEnumerator *enumerator = [dirs objectEnumerator ];
CNCDirectoryWatcher *directory;
while (directory = [enumerator nextObject ])
{
[directory update ];
}
// schedule a new pass
[ self performSelector : @selector ( updateDirectories )
withObject : nil afterDelay : catalogInterval ];
// release the pool
[pool release ];
}
}
The initDirectoriesInThread method is getting called and runs
correctly, but the updateDirectoriesInThread method never gets
called.
I looked at
-(void)performSelectorOnMainThread:(SEL) aSelector withObject:(id)
arg waitUntilDone:(BOOL) wait
But it doesn't appear to have a way to schedule the execution for a
specified delay.
Is there a way to use performSelector: withObject: afterDelay: to
satisfy both step 2 and 3 above?
Thanks for any help
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Re: Scheduling a selector when a thread completes
On Wed, Apr 29, 2009 at 8:55 PM, kentoz...@comcast.net wrote: I tried calling NSObject's performSelector:(SEL) aSelector withObject:(id) anArgument afterDelay:( NSTimeInterval ) delay But the receiver's aSelector method is never getting called. The only logical place to perform this scheduling is from inside the thread because only the thread knows when it is finished, but I'm having no luck getting the method to run. You need to run the runloop in the thread in order for timers or the performSelector* methods to work. Which changes your logic around a lot. One alternate way to get your goal is call performSelectorOnMainThread:withObject:waitUntilDone: and pass it a method that calls [self performSelector:@selector(updateDirectories) withObject:self afterDelay:1.0] (or whatever delay you want). ___ 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 is NSString-FSRef so hard?
On 29 Apr 09, at 06:15, Mark Douma wrote: If you are working with file paths, you shouldn't be using componentsSeparatedByString:, nor should you be defining / to be the component you should be separating by. What if someone had your app inside of a folder they named Apps/Utilities? The HFS+ filesystem actually uses a colon as the path separator, so having a / in the name of a file or folder is perfectly acceptable, but would likely cause a headache and unexpected results if your code were to encounter it. (Go to the Finder and try adding a /). What you're saying here is incredibly misleading, and actively harmful. While I believe that HFS+ uses : as a path separator on- disk, virtually all non-Carbon userspace code makes use of UNIX paths. Either Carbon or the Finder itself is swapping colons and slashes for display purposes - running ls should reveal that filenames which appear as slashes in the Finder appear as colons. Indeed, the methods in NSPathUtilities are entirely equivalent to string manipulation methods which split and join on slashes. They handle a lot of special cases for you (absolute paths, for instance), but they are in no way doing anything specific to HFS+. Moreover, you can rely on the path separator remaining a slash for the foreseeable future. ___ 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: Scheduling a selector when a thread completes
2. Wait until the thread completes NSThreadWillExitNotification? -- GG ___ 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
Building a 64-bit Preferences Pane
I have been trying to make a simple 64-bit preference pane. But all trials ended in failure. For example: 1) Make a new preference pane project SamplePrefPane with Xcode. 2) Set the build option ARCHS to x86_64 3) Build it and double click SamplePrefPane.prefPane Then System Preferences app says: Preferences Error You can't open SimplePrefPane preferences because it doesn't work on an Intel-based Mac. But my machine is MacPro, Quad-Core Intel Xeon. When I change the build option ARCHS to 32-bit universal, it works fine. Does anybody know how to make 64-bit preference panes? Satoshi - Satoshi Matsumoto sato...@mac.com 816-5 Odake, Odawara, Kanagawa, Japan 256-0802 ___ 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: Building a 64-bit Preferences Pane
Hi Satoshi, If you run this in Terminal: Bugdom:~ kiel$ file /Applications/System\ Preferences.app/Contents/ MacOS/System\ Preferences /Applications/System Preferences.app/Contents/MacOS/System Preferences: Mach-O universal binary with 2 architectures /Applications/System Preferences.app/Contents/MacOS/System Preferences (for architecture i386): Mach-O executable i386 /Applications/System Preferences.app/Contents/MacOS/System Preferences (for architecture ppc7400): Mach-O executable ppc You can see the System Preferences application is not a 64 bit application (at least, not yet). Therefore, you cannot make a 64 bit preference pane. Kiel On 30/04/2009, at 12:48 PM, 慧 松本 wrote: I have been trying to make a simple 64-bit preference pane. But all trials ended in failure. For example: 1) Make a new preference pane project SamplePrefPane with Xcode. 2) Set the build option ARCHS to x86_64 3) Build it and double click SamplePrefPane.prefPane Then System Preferences app says: Preferences Error You can't open SimplePrefPane preferences because it doesn't work on an Intel-based Mac. But my machine is MacPro, Quad-Core Intel Xeon. When I change the build option ARCHS to 32-bit universal, it works fine. Does anybody know how to make 64-bit preference panes? Satoshi - Satoshi Matsumoto sato...@mac.com 816-5 Odake, Odawara, Kanagawa, Japan 256-0802 ___ 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/kiel.gillard%40gmail.com This email sent to kiel.gill...@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: Building a 64-bit Preferences Pane
On 29 Apr 09, at 19:48, 慧 松本 wrote: Does anybody know how to make 64-bit preference panes? You can't, yet. The System Preferences application - which loads preference panes as plugins - is still 32-bit only, so it can't load 64-bit prefpane plugins. Rumor has it this may change in 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: Scheduling a selector when a thread completes
On Wed, Apr 29, 2009 at 9:55 PM, kentoz...@comcast.net wrote:
Hi
I wrote a directory scanner application that spawns 4 different threads with
independent rescan intervals and need to repeat the process if and only if a
thread has completed a scan. Basically, for each file type I'm watching, the
process is
1. Spawn a thread to sample files of the specified type
2. Wait until the thread completes
3. Schedule another pass after a given time interval has passed.
Seems like you're adding a lot of complication for what is essentially
a continually running operation. Instead of that, why not do this?
1. Spawn a thread.
2. Sample files.
3. Sleep.
4. Goto 2.
Or, in code:
- (void)threadMethod {
while(1) {
[self sampleFiles];
sleep(5);
}
}
Mike
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Re: Why is NSString-FSRef so hard?
On Wed, Apr 29, 2009 at 10:22 PM, Andrew Farmer andf...@gmail.com wrote: On 29 Apr 09, at 06:15, Mark Douma wrote: If you are working with file paths, you shouldn't be using componentsSeparatedByString:, nor should you be defining / to be the component you should be separating by. What if someone had your app inside of a folder they named Apps/Utilities? The HFS+ filesystem actually uses a colon as the path separator, so having a / in the name of a file or folder is perfectly acceptable, but would likely cause a headache and unexpected results if your code were to encounter it. (Go to the Finder and try adding a /). What you're saying here is incredibly misleading, and actively harmful. While I believe that HFS+ uses : as a path separator on-disk, virtually all non-Carbon userspace code makes use of UNIX paths. Either Carbon or the Finder itself is swapping colons and slashes for display purposes - running ls should reveal that filenames which appear as slashes in the Finder appear as colons. It is a baffling myth, and I can't understand how anyone with any experience with the system would actually believe it. The OS goes through a great deal of trouble to make HFS+ filesystems look and behave exactly like any other UNIX-visible filesystem. Do you not use Terminal? Do you not examine any of the hundreds or thousands of paths flying through your application? They *all* use / as the path separator. (The reason a folder named Apps/Utilities does not break things is because at the UNIX level this is represented as Apps:Utilities. / is not allowed in filenames at that level, period. Doesn't matter what filesystem you're on.) Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Building a 64-bit Preferences Pane
On 2009/04/30, at 12:05, Andrew Farmer wrote: On 29 Apr 09, at 19:48, 慧 松本 wrote: Does anybody know how to make 64-bit preference panes? You can't, yet. The System Preferences application - which loads preference panes as plugins - is still 32-bit only, so it can't load 64-bit prefpane plugins. Sorry, I forgot to mention my OS environment. I am developing the preference pane on Mac OS X 10.6 Snow Leopard build 10A335. Does my question violate NDA? Satoshi - Satoshi Matsumoto sato...@mac.com 816-5 Odake, Odawara, Kanagawa, Japan 256-0802 ___ 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: Building a 64-bit Preferences Pane
2009/4/29 慧 松本 sato...@mac.com: On 2009/04/30, at 12:05, Andrew Farmer wrote: On 29 Apr 09, at 19:48, 慧 松本 wrote: Does anybody know how to make 64-bit preference panes? You can't, yet. The System Preferences application - which loads preference panes as plugins - is still 32-bit only, so it can't load 64-bit prefpane plugins. Sorry, I forgot to mention my OS environment. I am developing the preference pane on Mac OS X 10.6 Snow Leopard build 10A335. Does my question violate NDA? Take it to https://devforums.apple.com/community/mac -- Clark S. Cox III clarkc...@gmail.com ___ 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 is NSString-FSRef so hard?
On Apr 29, 2009, at 9:22 PM, Andrew Farmer wrote: On 29 Apr 09, at 06:15, Mark Douma wrote: If you are working with file paths, you shouldn't be using componentsSeparatedByString:, nor should you be defining / to be the component you should be separating by. What if someone had your app inside of a folder they named Apps/Utilities? The HFS+ filesystem actually uses a colon as the path separator, so having a / in the name of a file or folder is perfectly acceptable, but would likely cause a headache and unexpected results if your code were to encounter it. (Go to the Finder and try adding a /). What you're saying here is incredibly misleading, and actively harmful. While I believe that HFS+ uses : as a path separator on- disk, virtually all non-Carbon userspace code makes use of UNIX paths. Either Carbon or the Finder itself is swapping colons and slashes for display purposes - running ls should reveal that filenames which appear as slashes in the Finder appear as colons. Indeed, the methods in NSPathUtilities are entirely equivalent to string manipulation methods which split and join on slashes. They handle a lot of special cases for you (absolute paths, for instance), but they are in no way doing anything specific to HFS+. Moreover, you can rely on the path separator remaining a slash for the foreseeable future. Carbon and the Finder are displaying the filenames as is, as HFS allows slashes to be in a filename, and the colon is the separator. Cocoa and the BSD layer, on the other hand, do swap the slashes and colons. Presumably the idea is to display slashes in a filename as whatever the path separator is supposed to be, so that the path can be a standard UNIX path - my guess is that if you had a file on an NTFS volume with a slash in its filename, Cocoa would interpret the slash as a backslash. I don't have an NTFS disk to test that with, though. With that said, I don't really see what is harmful about recommending the use of NSString's path concatenation methods, which could save quite a few headaches in the case that this *does* somehow change for some bizarre reason, however unlikely that may be. Charles ___ 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: Drawing Across NSTableView Columns [solved]
Thank you for the suggestions. It turns out that I went the second
way, and it works just fine (to tell you the truth, I was a bit
apprehensive at getting into drawing, but it wasn't as difficult as I
had suspected - the -frameOfCellAtColumn:row: really made everything
not too bad at all). Here is my code, added to the NSTableView
subclass, just in case someone else runs into this issue. slp is
just an NSArray of 3 integers which represent the beginning row, the
ending row, and the depth (how far indented) each of the lines should
be. If a line isn't meant to have an end, end=0, and then the line is
drawn in blue as opposed to steel.
-(void)drawRect:(NSRect)rect
{
// Draw the table first, by calling drawRect from the superclass
[super drawRect:rect];
// Do nothing if no slp's
NSArray *slp = [mydoc slp];
NSUInteger slpCount = [slp count];
if (slpCount == 0) return;
NSColor *blueish = [NSColor colorWithDeviceRed:0.0 green:.5 blue:1.0
alpha:.75]; // Some sort of blue
NSColor *steelish = [NSColor colorWithDeviceRed:.5797 green:.5797
blue:.5797 alpha:.75]; // Some sort of steel
BOOL endToLine;
for (NSUInteger i=0; islpCount; i++)
{
NSBezierPath *thePath = [NSBezierPath bezierPath];
[thePath setLineWidth:2.0];
// Find starting point for line
NSUInteger beginAtRow = [[slp objectAtIndex:i] begin];
NSUInteger endAtRow = [[slp objectAtIndex:i] end];
NSUInteger depth = [[slp objectAtIndex:i] depth];
// If endAtRow is zero, run the line to the bottom of the table
if (endAtRow == 0)
{
endAtRow = [datasource rowCount]-1;
// Set pen colour to blueish
[blueish set];
// Flag no end to line
endToLine = NO;
}
else
{
// Set pen colour to steelish
[steelish set];
// Flag endToLine
endToLine = YES;
}
NSRect beginAtRowRect = [self frameOfCellAtColumn:[self
columnWithIdentifier:@F] row:beginAtRow];
NSRect endAtRowRect = [self frameOfCellAtColumn:[self
columnWithIdentifier:@F] row:endAtRow];
NSPoint beginPoint, endPoint;
beginPoint.y = beginAtRowRect.origin.y + beginAtRowRect.size.height/
2.0;
beginPoint.x = beginAtRowRect.origin.x + depth*7.0;
endPoint.y = endAtRowRect.origin.y +
endAtRowRect.size.height/2.0;
endPoint.x = endAtRowRect.origin.x + depth*7.0;
[thePath setLineCapStyle:NSSquareLineCapStyle];
[thePath setLineJoinStyle:NSRoundLineJoinStyle];
// Move to starting location, and draw the line
[thePath moveToPoint:(NSMakePoint(beginPoint.x+5,
beginPoint.y))];
[thePath lineToPoint:beginPoint];
[thePath lineToPoint:endPoint];
if (endToLine) [thePath lineToPoint:(NSMakePoint(endPoint.x+5,
endPoint.y))];
[thePath stroke];
}
}
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Re: Changing a custom field editor's position
Hi Ulai,
Did you find a solution to this problem? I'm trying to do the same
thing.
Darcy
Hi,
Let's say I want to have the field editor for a table view appear 2
pixel below where it usually is, i.e. shifted 2 pixels down.
How can I do this?
Consider the following hypothetical situation: If I subclass
NSTextView and override the drawRect method like this,
- (void)drawRect:(NSRect)rect
{
NSRect frame = [self frame];
frame.origin.x += 5.0;
[self setFrame:frame];
[super drawRect:rect];
}
and use this subclass for the field editor of my table view, no
changes occur. But shouldn't this custom field editor move by 5.0
pixels to the right on and on until it finally disappears and
becomes invisible? But for some reasons that does not happen. This
means that setting the frame's origin apparently has no effect.
And that is essentially why I'm all blank on how to reposition the
field editor. Any ideas?
Thanks, U
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Re: Why is NSString-FSRef so hard?
On Thu, Apr 30, 2009 at 12:02 AM, Charles Srstka cocoa...@charlessoft.com wrote: With that said, I don't really see what is harmful about recommending the use of NSString's path concatenation methods, which could save quite a few headaches in the case that this *does* somehow change for some bizarre reason, however unlikely that may be. Even if the path separator never changes, they are still beneficial to use because they automatically handle both the trailing slash present and trailing slash missing cases transparently [@/foo stringByAppendingPathComponent: @bar] - /foo/bar [@/foo/ stringByAppendingPathComponent: @bar] - /foo/bar - 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
Re: Why is NSString-FSRef so hard?
On Thu, Apr 30, 2009 at 12:02 AM, Charles Srstka cocoa...@charlessoft.com wrote: With that said, I don't really see what is harmful about recommending the use of NSString's path concatenation methods, which could save quite a few headaches in the case that this *does* somehow change for some bizarre reason, however unlikely that may be. Nothing wrong with recommending the NSString methods. Indeed, that's a good idea. What's harmful is spreading false information about HFS's path separators. When dealing with UNIX paths, the OS X path separator is /, end of story. (When dealing with Carbon paths, it's :, no matter what your filesystem, even on UFS, even on FAT32, but a Cocoa app rarely has any occasion to use Carbon paths.) Mike ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Repositioning the Field Editor
So, I have continued my work with a subclass of NSTextView for my
field editor, and here is another part of the puzzle: (i) if I
implement -drawRect: in the subclass, and ask it for the frame, the
frame is the same as the frame set in -viewWillDraw, but not acted
upon; (ii) if I implement -drawRect: in the subclass, but do not call
super, the field editor box is still drawn at the usual location (the
text is not drawn properly, etc., but the box is). This leads me to
think that -drawRect is not drawing the box for the field editor. The
question is, what object is drawing that box, and is there a way to
move it?
On 28-Apr-09, at 12:47 PM, K. Darcy Otto wrote:
Continuing on with the mystery, I have tried the following code in
my NSTableView subclass (below, not yet solved though). I have got
it so that the rect returned by [fieldEditor frame] is not empty,
but gives exactly the frame it should. Still though, modifying the
frame to something different makes no difference. Is there a way to
prompt the field editor to redraw itself in accordance with the new
frame?
In the documentation for -editColumn:row:withEvent:select:, I
noticed that it sends -
selectWithFrame:inView:editor:delegate:start:length: and -
editWithFrame:inView:editor:delegate:event: to the field editor’s
NSCell object with the NSTableView as the text delegate. So my call
to super is doing that. Could it be that I need to intervene
somehow in these NSCell methods?
-(void)editColumn:(NSInteger)columnIndex row:(NSInteger)rowIndex
withEvent:(NSEvent *)theEvent select:(BOOL)flag
{
[super editColumn:columnIndex row:rowIndex withEvent:theEvent
select:flag];
NSTextView *fieldEditor = (NSTextView *)[[self window]
fieldEditor:YES forObject:nil];
// Change the text colour to red, just to confirm I've got ahold of
the actual field editor that is being used (I do)
[fieldEditor setTextColor:[NSColor redColor]];
// Get the field editor frame (it is the correct frame)
NSRect cellRect = [fieldEditor frame];
NSLog(@1. fieldEditor x origin: %f,cellRect.origin.x); // output:
127
// Change cellRect x origin, but don't extend the field width
cellRect.origin.x += 20;
cellRect.size.width -= 20;
// Set fieldEditor frame to new cellRect
[fieldEditor setFrame:cellRect];
[fieldEditor setNeedsDisplay:YES];
cellRect = [fieldEditor frame];
NSLog(@2. fieldEditor x origin: %f,cellRect.origin.x); // output:
147
}
On 27-Apr-09, at 7:19 PM, K. Darcy Otto wrote:
I have a field editor which I need to reposition in my tableView –
specifically, I need to move it a few pixels to the right. The
following post:
http://www.cocoabuilder.com/archive/message/cocoa/2009/3/16/232513
makes two suggestions: (i) implement the move in -viewWillDraw in
the field editor subclass, and (ii) reposition the field editor
after calling super in -editColumn:row:withEvent:select: in the
tableView subclass. Neither of these seem to make any difference
to where the field editor is drawn. Here is my code with respect
to (i), contained in the field editor subclass:
-(void)viewWillDraw
{
NSRect frame = [self frame];
NSLog(@Old: %f,frame.origin.x);
frame.origin.x += 50.0;
[self setFrame:frame];
frame = [self frame];
NSLog(@New: %f,frame.origin.x);
[super viewWillDraw];
}
Now, I can confirm this method is being called, and by means of the
NSLog statements, the frame is being changed prior to the call to
super. Unfortunately, the field editor is drawn where is usually
is drawn, with no shift in place.
With respect to (ii), contained in the tableView subclass:
-(void)editColumn:(NSInteger)columnIndex row:(NSInteger)rowIndex
withEvent:(NSEvent *)theEvent select:(BOOL)flag
{
[super editColumn:columnIndex row:rowIndex withEvent:theEvent
select:flag];
NSText *fieldEditor = [[self window] fieldEditor:YES
forObject:self];
NSRect fieldEditorFrame = [fieldEditor frame];
fieldEditorFrame.origin.x += 50.0;
[fieldEditor setFrame:fieldEditorFrame];
}
Here, it turns out that even though fieldEditor points to the
custom field editor object, fieldEditorFrame turns out to be
empty. And again, the field editor is drawn where it is usually
drawn, with no shift in place.
Any help would be greatly appreciated.
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Animating .gif in NSImageView
In Interface Builder, I dragged an Image Well (NSImageView) onto my window and checked the Animates and Editable attribute flags. When running my app, I can drag a .gif into the Image Well and it works great -- the animated gif animates. If I cut and paste back into the same Image Well, the image appears but there is no animation. Same thing happens when I archive/unarchive -- the first frame appears, but no animation. So drop works, paste and unarchive don't. Which has me a bit baffled. Clearly, NSImageView has the ability to display animated gif files, because it is doing so for my dropped files. But not for files loaded by other means. Is there some method I need to invoke after pasting or unarchiving that will cause the gif animation to start? Would really appreciate any ideas or solutions! ___ 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
NSURLConnection unhappiness
Hello,
I am currently working on a small iphone app, and I am facing some
difficulty with getting NSURLConnection to ... connect. Basically my unit
tests don't pass: connection is never made.
Here is a snippet of the non-working code:
code
- (id) initWithURL: (NSURL*) someurl
{
self = [super init];
if (self != nil) {
self-url = [someurl copy];
NSURLRequest * request = [NSURLRequest requestWithURL:self-url
cachePolicy: NSURLRequestUseProtocolCachePolicy timeoutInterval: 6.0];
NSLog([NSString stringByAppendingStrings:@Request: , [request
description], nil]);
self-finished = NO;
self-connection = [[NSURLConnection alloc]
initWithRequest:requestdelegate:self startImmediately:NO];
}
return self;
}
- (void) downloadData
{
NSLog([self-connection description]);
NSLog(@run, b*$#4rd, run...);
[self-connection scheduleInRunLoop:[NSRunLoop currentRunLoop]
forMode:NSDefaultRunLoopMode];
[self-connection start];
int timeout = 30;
int i = 0;
while(self-finished == NO [self _deletegateTerminateCheck] == NO) {
// suspend thread
[NSThread sleepForTimeInterval: 1.0];
i++;
/// stupid, but effective safety measure:
if(i = timeout) {
break;
}
}
}
- (NSData *) data {
return self-data;
}
#pragma mark NSConnectionDelegate implementation
- (NSURLRequest *)connection:(NSURLConnection *)connection
willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse
*)response
{
NSLog(@Will send request);
return request;
}
- (void)connection:(NSURLConnection *)connection
didReceiveResponse:(NSURLResponse *)response
{
NSLog(@Did get response);
NSString * encoding = [response textEncodingName];
self-dataEncoding = [self getEncodingForEncodingName: encoding];
self-mimeType = [response MIMEType];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData
*)receiveddata
{
NSLog(@Did get data);
if([self _deletegateTerminateCheck]) {
if(self-data != nil) {
[self-data release];
self-data = nil;
}
[self-connection cancel];
[self-connection release];
self-connection = nil;
return;
}
if(self-data == nil) {
self-data = [[NSMutableData alloc]init];
}
[self-data appendData:receiveddata];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSLog(@did finish loading page);
self-finished = YES;
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError
*)error
{
NSLog([NSString stringByAppendingStrings:@Connection failed with error:
, [error description], nil]);
self-finished = YES;
}
- (NSCachedURLResponse *)connection:(NSURLConnection *)connection
willCacheResponse:(NSCachedURLResponse *)cachedResponse
{
NSLog(@Will cache response);
return cachedResponse;
}
- (void) dealloc {
if(self-url !=nil) {
[self-url release];
self-url = nil;
}
if(self-connection != nil) {
[self-connection release];
self-connection = nil;
}
[super dealloc];
}
/code
Here is the output that I get from the build:
2009-04-25 14:14:22.699 otest[6135:80f] Request: NSURLRequest
http://arstechnica.com
2009-04-25 14:14:22.704 otest[6135:80f] NSURLConnection: 0x31d2a0,
http://arstechnica.com
2009-04-25 14:14:22.705 otest[6135:80f] run, b*$#4rd, run...
2009-04-25 14:14:22.706 otest[6135:80f] hello?
2009-04-25 14:14:52.709 otest[6135:80f] Data is nil!
Data is nil! is dumped by the
[NSString stringByAppendingStrings: ] is my own extension and it works.
I also found
http://www.cocoabuilder.com/archive/message/cocoa/2009/3/31/233409 which
helped, without scheduling in the run loop things fail miserably.
Once again, this is all run inside a unit test. So I am not sure what else
may be missing from the run loop, looks like the URL connection never really
even starts the loading mechanism.
Thanks a bunch,
Nick
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Re: NSURLConnection unhappiness
Hi Nick.
You can't sleep the thread. According to the documentation for -
[NSThread sleepForTimeInterval:], No run loop processing occurs while
the thread is blocked.. You need to run the run loop for the
connection to process.
On an unrelated note, your use of self-connection, etc., is non-
standard and not advised. You should be using direct ivar access
connection, properties self.connection, or accessor methods [self
connection].
-Jeff
On Apr 29, 2009, at 11:31 PM, Nick Hristov wrote:
- (void) downloadData
{
NSLog([self-connection description]);
NSLog(@run, b*$#4rd, run...);
[self-connection scheduleInRunLoop:[NSRunLoop currentRunLoop]
forMode:NSDefaultRunLoopMode];
[self-connection start];
int timeout = 30;
int i = 0;
while(self-finished == NO [self _deletegateTerminateCheck] ==
NO) {
// suspend thread
[NSThread sleepForTimeInterval: 1.0];
i++;
/// stupid, but effective safety measure:
if(i = timeout) {
break;
}
}
}
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Registering Clients using DO
I am developing a client/server application using DO. In server an
object is vended to be accessible by clients.In the client side i am
accessing vended object and get required info from server.Every thing
works fine. Until now my client queries server and server replies to
that. But on serverside if any updates goes, i had to inform client.so
i thought of registering the client and ping the client for updates.So
in Client side i get vended object and registered it to server.When my
server pings the client its giving error *** NSDistantObject
initWithCoder: 0x1 not given away for conn 0xf8937f0
I think my registering of client with server goes wrong , can anyone
suggest me what i am missing here.If any sample code that would be
great.
Server
---
main() {
int newSocket = socket(AF_INET, SOCK_STREAM, 0);
struct sockaddr_in address;
memset(address, 0, sizeof(address));
address.sin_family = AF_INET;
address.sin_addr.s_addr = htonl(INADDR_ANY);
address.sin_port = htons(PORT_NUMBER);int yes = 1;
setsockopt(newSocket, SOL_SOCKET, SO_REUSEADDR, yes, sizeof(yes));
bind(newSocket, (struct sockaddr *)address, sizeof(address));
listen(newSocket, 128);
NSSocketPort *serverPort = [[NSSocketPort alloc]
initWithProtocolFamily:PF_INET socketType:SOCK_STREAM protocol:0
socket:newSocket];
connection = [[NSConnection alloc] initWithReceivePort:serverPort
sendPort:serverPort];
NSRunLoop *runloop = [NSRunLoop currentRunLoop];
[connection setRootObject:[ServerObject sharedServerObject]];
[connection addRunLoop:runloop];
[runloop run];
}
@implementation ServerObject : NSObject
-(void)registerClient:(idNetClientProto)client {
[clients setObject:client forKey: @C1];
if(![timer isValid])
timer = [[NSTimer scheduledTimerWithTimeInterval:1 target:self
selector:@selector(pingClients) userInfo:nil repeats:YES] retain];
}
-(void)pingClients {
[[clients objectForKey:[[clients allKeys] lastObject]] ping];
}
Client
---
-(id)getServer{
@try{
NSSocketPort *port = [[NSSocketPort alloc]
initRemoteWithTCPPort:PORT_NUMBER host:host];
NSConnection *connection = [[NSConnection alloc]
initWithReceivePort:nil sendPort:port];
[connection setDelegate:self];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(handleConnectionDied:)
name:NSConnectionDidDieNotification object:serverConnection];
[port release];
serverObject = [connection rootProxy];
[serverObject performSelector:@selector(registerClient:)
withObject:self];
}...@catch(NSException *exception){
[self destroyConnection];
}
return serverObject;
}
-(void)ping{
NSLog(@server pinged);
}
Regards
SKiran
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Re: NSURLConnection unhappiness
On Thu, Apr 30, 2009 at 1:44 AM, Jeff Johnson publicpost...@lapcatsoftware.com wrote: On an unrelated note, your use of self-connection, etc., is non-standard and not advised. You should be using direct ivar access connection, properties self.connection, or accessor methods [self connection]. Sure, `self-connection` is redundant with just plain old `connection`, but they amount to the same thing. Unless there's some new-runtime trickery going on that I'm not aware of. --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: Building a 64-bit Preferences Pane
Thanks!! My problem was resolved at https://devforums.apple.com/community/mac Satoshi On 2009/04/30, at 12:59, Clark Cox wrote: 2009/4/29 慧 松本 sato...@mac.com: On 2009/04/30, at 12:05, Andrew Farmer wrote: On 29 Apr 09, at 19:48, 慧 松本 wrote: Does anybody know how to make 64-bit preference panes? You can't, yet. The System Preferences application - which loads preference panes as plugins - is still 32-bit only, so it can't load 64-bit prefpane plugins. Sorry, I forgot to mention my OS environment. I am developing the preference pane on Mac OS X 10.6 Snow Leopard build 10A335. Does my question violate NDA? Take it to https://devforums.apple.com/community/mac -- Clark S. Cox III clarkc...@gmail.com - Satoshi Matsumoto sato...@mac.com 816-5 Odake, Odawara, Kanagawa, Japan 256-0802 ___ 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
