On Apr 17, 2008, at 1:16 AM, xiaobin wrote:
In my application, I want to download a file from internet. so I use
NSURLDownload to do it. and using NSRunLoop to wait until finish the
downloading action.
If the file is small enough to fit into memory, you can use one of
these:
+[NSData dataWi
On Apr 16, 2008, at 22:54, William Towe wrote:
To achieve this I bound the table view's contentArray binding to
controller key "selection" and model key path:
"@unionOfArrays.allDescendantsNodes". The allDescendantNodes method
in my
file node class returns an array with all its descendants i
I'm pretty sure you can do this, the only problem is the bytesPerRow
value. Since you need 8 bits to a byte your row size needs to be a
multiple of 8 (to make an even number of bytes). If this is undoable,
8bits per sample would be the next smallest and will definitely work.
On Apr 16, 2
Instead of calling stop:, try CFRunLoopStop(CFRunLoopGetCurrent()).
Should stop the innermost runloop call.
On Apr 17, 2008, at 12:16 AM, xiaobin wrote:
In my application, I want to download a file from internet. so I use
NSURLDownload to do it. and using NSRunLoop to wait until finish the
hi, all
In my application, I want to download a file from internet. so I use
NSURLDownload to do it. and using NSRunLoop to wait until finish the
downloading action. for example 2 seconds. codes as the following
[downloadFile setDestination:downloadPath allowOverwrite:YES];
[[NSRunLoop currentRu
Any suggestions anyone has are welcome, if you need more details about my
setup I'll attempt to provide them, but I still haven't figured out why the
insertion of new objects is updated in the outline view and not the table
view.
On Wed, Apr 16, 2008 at 5:48 PM, William Towe <[EMAIL PROTECTED]> wr
On 17/04/2008, at 1:59 AM, Erik Buck wrote:
See the TextEdit example code on you hard disk. The last time I
looked, it was not a document based application,
Actually, the version of TextEdit that ships with the Leopard
developer tools has been updated so it uses NSDocument. Prior version
Is it possible to create a 1-bit (black and white) NSBitMapImageRep?
If so, what are the magic parameters? If not, what is the smallest
number of bits per pixel supported?
--
S.O.S.
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Please
Hello,
I'm creating a borderless window whose content view uses Core
Animation...
When I do this, the window is drawn without any shadow no matter the
alpha of the content.
- a borderless window with a normal view draws the window's shadow.
- a normal window with a content view which use
Hi,
let's say I have four versions of my data model:
DataModel1.xcdatamodel
DataModel2.xcdatamodel
DataModel3.xcdatamodel
DataModel4.xcdatamodel (this is the current one)
and three model mapping files which always map from version n to
version n+1:
Mapping1to2.xcmappingmodel
Mapping2to3.xcma
Because strokes are drawn centred on the coordinate of the path, so a
1-pixel line extends 0.5 of a pixel above and below the coordinate.
Offsetting by 0.5 makes it draw such that the exact pixel is filled.
--
S.O.S.
On 17 Apr 2008, at 9:17 am, Martin wrote:
It works!
Why such a behav
On Apr 16, 2008, at 4:26 PM, Seth Willits wrote:
I have a text view bound to a key path through an array controller's
selectedObject, and it doesn't update the value immediately when
changing the text, it only updates the model if the text view loses
first responder. I need the model sync'd
I have a text view bound to a key path through an array controller's
selectedObject, and it doesn't update the value immediately when
changing the text, it only updates the model if the text view loses
first responder. I need the model sync'd before I do a certain
operation, so I need to bi
It works!
Why such a behaviour?
Thanks,
-Martin
On Apr 17, 2008, at 1:15 AM, John Terranova wrote:
Try adding these lines before creating the NSBezierPath:
cellFrame.origin.x += 0.5;
cellFrame.origin.y += 0.5;
Let me know if it works. It should.
john
On Apr 16, 2008, at 3:52 PM, Ma
On Apr 16, 2008, at 12:38 PM, Colin Cornaby wrote:
The issue is that I really need a rect. Getting the actual image of
what is selected will tell me the width and height of the rect, but
not the x and y.
So, you're after the origin of the rect in addition to the dimensions?
Since IKImageV
On Wed, Apr 16, 2008 at 5:34 PM, John Stiles <[EMAIL PROTECTED]> wrote:
>
> Honestly, I can't see value in always coding to CFArray just so I can rip
> out the back end later if I don't like the results.
The value is that 99% of the time you won't need to, saving time and
effort by using a nice b
Hi,
I'm trying to draw a rounded rectangle with a 1 pixel-perfect wide
border. Although I made sure that the rect has integral values and its
height it an even number (so that height/2.0 is also even), the top
and bottom lines look blurry (screenshot: http://img01.picoodle.com/img/img01/4/4
On 16 Apr 2008, at 22:34, John Stiles wrote:
Honestly, I can't see value in always coding to CFArray just so I
can rip out the back end later if I don't like the results.
If anything, it would make more sense to me to use NSArray for that
purpose, since I know working with and subclassing
On Apr 16, 2008, at 2:29 PM, Peter Ammon wrote:
Well, in the nib files from Mail and Preview there are no toolbars,
so Apple builds them via code. So the question is: If I code them
as well, is it possible to do the same that Apple does in Mail and
Preview via NSSegmentedCell or is this all
This is my first post to the list, I've been using it as a reference for
quite some time and usually I can find a solution to my problems, but
searching didn't turn anything up that applied to my current issue. So
here's the gist of it:
I'm working on an IDE for z80 calculator programmers, and hav
Hi all,
I know this has been discussed many times before, but I still can't
find a definitely easy and all-purpose answer. Is it really that hard
to print the content of an NSTableView? It seems there are two main
ways to do that.
- The first way is to create another NSTableView in an invi
Honestly, I can't see value in always coding to CFArray just so I can
rip out the back end later if I don't like the results.
If anything, it would make more sense to me to use NSArray for that
purpose, since I know working with and subclassing NSArray will be easy
and painless. Core Foundatio
On Apr 16, 2008, at 1:27 PM, Stefan Hafeneger wrote:
Hi,
Has anyone tried to use the Capsule-Style Toolbar Controls in an app
so that it looks and behaves like Mail or Preview? When I add them
to my toolbar it looks like Mail. But if I compare them side by side
the ones in Mail and Previ
On Wed, Apr 16, 2008 at 1:20 PM, John Stiles <[EMAIL PROTECTED]> wrote:
> The difference is, in STL, if you want an array where you can remove from
> the beginning, you would never use vector<> anyway. You'd use deque<>, which
> has different tradeoffs and allows fast removal of elements from the
Hi,
Has anyone tried to use the Capsule-Style Toolbar Controls in an app
so that it looks and behaves like Mail or Preview? When I add them to
my toolbar it looks like Mail. But if I compare them side by side the
ones in Mail and Preview there is a 2 pixel difference of the
baseline. And
I've encountered a situation where NSUserDefaults is definitely not
thread safe. Consider an user defaults value bound to an interface
object. A background thread modifies this value, first acquiring the
lock to write to the user defaults, writes the new value, and finally
triggers a KVO
Also with a kext. See IOKit/hidsystem
On Apr 15, 2008, at 11:44 AM, Kyle Sluder wrote:
On Tue, Apr 15, 2008 at 7:41 AM, Apparao Mulpuri
<[EMAIL PROTECTED]> wrote:
Is three any way to capture mouse events globally from my
background app.
1) Why are you doing this? I'm curious.
2) See Quartz
> The File Open (for instance) menu item is already assigned, it sends
> openDocument: to FirstResponder. I can see it right there in the
> bindings, that menu item is already set up to call something.
Yes. But what is the first responder?
It is the user interface item which has focus. In many ca
> Hmm, set sounds a lot easier than this to me.
That's one way. Personally, I would try map> with the
map key being the lower bound of the "bucket".
--
Scott Ribe
[EMAIL PROTECTED]
http://www.killerbytes.com/
(303) 722-0567 voice
___
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I wrote an example for how to easily find these problems:
http://www.corbinstreehouse.com/blog/index.php/2007/10/instruments-on-leopard-how-to-debug-those-random-crashes-in-your-cocoa-app/
corbin
On Apr 15, 2008, at 11:20 PM, Nick Rogers wrote:
hi,
when i release the NSAutoReleasePool in a sec
El 16-04-2008, a las 4:21, [EMAIL PROTECTED] escribió:
On Wed, Apr 16, 2008 at 1:17 AM, Mario Gajardo Tassara
<[EMAIL PROTECTED]> wrote:
El 15-04-2008, a las 14:21, [EMAIL PROTECTED]
escribió:
I have a nasty leak problem when i realloc several methods of the
main
class of my app.
Hi all,
I'm having problems with KVO and a NSCollectionView. As far as I know
should the Property "selctionIndexes" be KVO compliant. I've added an
Observer and it gets called, every time I'm sending
"setSelectionIndexes" to the Collection view. But if I set the
selection directly on a NS
On Wed, Apr 16, 2008 at 9:26 AM, Michael Ash <[EMAIL PROTECTED]> wrote:
> On Wed, Apr 16, 2008 at 12:04 PM, Clark Cox <[EMAIL PROTECTED]> wrote:
> > The purpose of the write barrier is to tell the collector to keep
> > something alive; it has nothing to do with when to collect it.
>
> Right, I
Thanks very much to everyone who replied to my question. You've given
me a lot to think about; I'll crank up the old grey cells and see if I
can digest all of it (sorry for the mixed metaphor). If I come up
with any brilliant insights (very unlikely), I'll post a note.
Boyd
__
On 16 Apr 2008, at 11:53, Uli Kusterer wrote:
Am 16.04.2008 um 10:47 schrieb Brad Peterson:
So, if I had some text, say : "Hi Tom, Please call
Cheryl at 444-555-6767 and she can get you that
info..." I want to be able to "know" that 444-555-6767
is a phone number and should be marked as such.
Jean-Daniel Dupas wrote:
Le 16 avr. 08 à 00:07, John Stiles a écrit :
Hmm, set sounds a lot easier than this to me.
Just use insert to put all the doubles into the set (one line), then
use lower_bound to find the delineations between each group (another
one-liner, though of course you'll nee
On 16 Apr 2008 09:40:46 -0600, Dave DeLong" <[EMAIL PROTECTED]>
wrote:
(Guess I have to keep top posting.)
If you're only concerned with US phone numbers, about a half-dozen
canned patterns should suffice. However, if you need to deal with
phone numbers in places like Australia, Japan, and
Am 16.04.2008 um 10:47 schrieb Brad Peterson:
So, if I had some text, say : "Hi Tom, Please call
Cheryl at 444-555-6767 and she can get you that
info..." I want to be able to "know" that 444-555-6767
is a phone number and should be marked as such.
Apple has this in Mail. No idea whether there
On Apr 16, 2008, at 03:01, Roland King wrote:
I think perhaps I'm not being clear in what I'm asking.
The File Open (for instance) menu item is already assigned, it sends
openDocument: to FirstResponder. I can see it right there in the
bindings, that menu item is already set up to call som
Awsome, that looks a very handy category to have around. Thanks for
producing it.
Mike.
On 16 Apr 2008, at 17:06, Antonio Nunes wrote:
On Apr 16, 2008, at 11:11 AM, Mike Abdullah wrote:
Also, another alternative is to follow a singleton pattern like
NSFileManager et. al and implement thes
On Wed, Apr 16, 2008 at 12:04 PM, Clark Cox <[EMAIL PROTECTED]> wrote:
> The purpose of the write barrier is to tell the collector to keep
> something alive; it has nothing to do with when to collect it.
Right, I get that now.
[snip]
> Garbage Collection:
> The housekeeping is taken care of,
I never thought of using a hash function to do binning. Interesting
approach.
Army Research Lab wrote:
Have you looked at hash_multimap
(http://www.sgi.com/tech/stl/hash_multimap.html)? Note that the following
code was beaten out in entourage, without compiling, testing, etc.
struct eqdouble
On Wed, Apr 16, 2008 at 5:28 AM, Alastair Houghton
<[EMAIL PROTECTED]> wrote:
> On 16 Apr 2008, at 03:29, Michael Ash wrote:
> > If this is the case then how does the collector know that you have
> > cleared the memory. It seems to me that without a write barrier, the
> > collector will not see the
On Apr 16, 2008, at 11:11 AM, Mike Abdullah wrote:
Also, another alternative is to follow a singleton pattern like
NSFileManager et. al and implement these as instance methods. If you
do persist with either of the ObjC-based approaches, I would also
suggest changing your first method to:
On Tue, Apr 15, 2008 at 7:29 PM, Michael Ash <[EMAIL PROTECTED]> wrote:
> On Tue, Apr 15, 2008 at 4:53 PM, Greg Parker <[EMAIL PROTECTED]> wrote:
> > You don't need a write barrier when erasing GC-scanned memory. The write
> > barrier helps the collector see pointers that it might otherwise miss
Hi,
Does anyone knows a good book or tutorial that covers printing (in-
depth) in Cocoa apps ??, I have Hillegass book but just covers the
minimal steps for printing..
I'll write below the problems I have with my app in case anyone can
help, Thanks!
--
I have a doc
See the TextEdit example code on you hard disk. The last time I looked, it was
not a document based application, and it certainly displays an Open dialog.
Or, you can look at the sample in Cocoa Programming which explains in detail
how the Cocoa document infrastructure works including a partia
> For example, how long does the typical app run for with libgmalloc
> hanging out and chewing up pages?
Well, that is actually one reason that I've been wanting to go 64-bit ;-)
--
Scott Ribe
[EMAIL PROTECTED]
http://www.killerbytes.com/
(303) 722-0567 voice
__
On 16 Apr 2008, at 16:43, Alexander Cohen wrote:
I have an NSString that contains this Unicode character: '\u00e9'. I
have another app that represents the same character as 'e\u0301'. Is
there any way to transform one to the other so that isEqualToString
returns YES?
Yes. You want to loo
Hi Michael,
My pleasure. Although Scott wrote the docs that I used to learn CA so
I could write a book ;)
As Scott pointed out if you are simply resizing the view you don't
necessarily need layers to accomplish animation as the view's animator
will do the animation just fine. If you are d
Just noticed that by using the NOrmalize functions i can get what i
need.
thx
AC
On Apr 16, 2008, at 11:43 AM, Alexander Cohen wrote:
I have an NSString that contains this Unicode character: '\u00e9'. I
have another app that represents the same character as 'e\u0301'. Is
there any way to
On Apr 16, 2008, at 8:43 AM, Alexander Cohen wrote:
I have an NSString that contains this Unicode character: '\u00e9'. I
have another app that represents the same character as 'e\u0301'. Is
there any way to transform one to the other so that isEqualToString
returns YES?
You can use the "
I have an NSString that contains this Unicode character: '\u00e9'. I
have another app that represents the same character as 'e\u0301'. Is
there any way to transform one to the other so that isEqualToString
returns YES?
thx
AC
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Cocoa-dev maili
The thing that first comes to mind would be to use regular expressions.
CocoaDev has a good page listing where you could find some Regex
frameworks:
http://www.cocoadev.com/index.pl?RegularExpressions
Then you'd run your string through a matcher while looking for the phone
number pattern. You co
Hi Thomas,
you need to link the plugins to the frameworks as well, or you add the
linker option: "-undefined dynamic_lookup" to the plugins. That will
stop linker errors, but you'll have to make sure that the objects that
are not found during linking, are there at execution time, when they
If it is absolutely necessary to use NSTask for launching the app, you
can also use the "open" command which honours the one instance per-app
rule properly. However, I agree that NSWorkspace is the best thing to
use in most cases.
Mike.
On 16 Apr 2008, at 15:43, Jens Alfke wrote:
On 16
Hi,
If I set up key-value observing of an NSArrayController's
arrangedObjects like so:
[myArrayController addObserver:self forKeyPath:@"arrangedObjects"
options:(NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew)
context:nil];
I get informed when the array controller's content ch
On 16 Apr '08, at 5:16 AM, Praveen Kumar wrote:
Instead of AppleScript, I tend to use NSTask to launch the
application, but it won't use the active application instead it
opens another one and do the stuff.
Launching GUI apps via low-level Unix system calls (as NSTask does)
can be probl
Bill,
Given that you've "written the book" on Core Animation, I really
appreciate your insights. Since my view is layer backed (I called
setWantsLayer:YES on a parent view), then my call to [[self layer]
addAnimation...] should be [self addAnimation] instead? The other
thing that I'm no
I have mis-spoken. Identity Services is Leopard only.
From the Identity Services programming guide (http://developer.apple.com/documentation/Networking/Conceptual/IdentityServices_ProgGuide/Introduction/chapter_1_section_1.html
):
"Identity Services is a new technology in Mac OS X v10.5 that a
I found this message in the archives from a few months ago. In case
anyone else runs into it, I discovered that it happens only when
garbage collection is enabled. I filed Radar 5867411.
I've an odd problem with a drawer in my application. I'm seeing the
behavior on Leopard, but it could ha
Le 16 avr. 08 à 15:09, Alexander Cohen a écrit :
Whats the best way in cocoa to get a list of users on a machine for
10.4 and up?
thx
AC
The most reliable way to do it is to use Directory Services.
There is no official Obj-C DS API (The DSObjcWrapper is part of
darwin and is open sourc
http://www.cimgf.com/2008/04/09/cocoa-tutorial-introduction-to-identity-services/
It has a few 10.5 only features, but you can probably get the gist of
API level calls that will work in 10.4.
Here's a demo from Apple: http://developer.apple.com/samplecode/IdentitySample/
-Matt
On Apr 16, 2
Whats the best way in cocoa to get a list of users on a machine for
10.4 and up?
thx
AC
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Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-
Hi,
I created a Cocoa application that uses WebKit to show the Html
pages. The Javascript files access cocoa methods using the concept "
Using Objective-C From JavaScript ". I got a issue after adding apple
scriptability to the project. The app is not quitting from dock and
also not quit
Have you looked at hash_multimap
(http://www.sgi.com/tech/stl/hash_multimap.html)? Note that the following
code was beaten out in entourage, without compiling, testing, etc.
struct eqdouble
{
bool operator()(const double d1, const double d2) const
{
double diff = d1 - d2;
if (diff < 0
Hi, I'm playing with the HICocoaViewCreate method
so here is a code which I call from the main thread
HIViewRef rootView = HIViewGetRoot(rootWindow);
NSRect buttonRect = NSMakeRect(0,0,150,30);
NSButton *button = [[NSButton alloc] initWithFrame : buttonRect];
[button setButt
Hi,
let's say I have four versions of my data model:
DataModel1.xcdatamodel
DataModel2.xcdatamodel
DataModel3.xcdatamodel
DataModel4.xcdatamodel (this is the current one)
and three model mapping files which always map from version n to
version n+1:
Mapping1to2.xcmappingmodel
Mapping2to3.xcm
Hi Johan,
Ya it is some sort of like that. Thanks for url.
Parag
On Wed, Apr 16, 2008 at 3:47 PM, Johan Kool <[EMAIL PROTECTED]> wrote:
> Hello Parag,
>
> Is this the kind of functionality you were after:
>
> http://www.zathras.de/angelweb/sourcecode.htm#UKCrashReporter
>
> See UKFeedbackProvid
Hello Parag,
Is this the kind of functionality you were after:
http://www.zathras.de/angelweb/sourcecode.htm#UKCrashReporter
See UKFeedbackProvider and NiftyFeatures on that page...
Johan
---
http://www.johankool.nl/
___
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Also, another alternative is to follow a singleton pattern like
NSFileManager et. al and implement these as instance methods. If you
do persist with either of the ObjC-based approaches, I would also
suggest changing your first method to:
+ (float)systemVolume;
as this is more common Cocoa
I think perhaps I'm not being clear in what I'm asking.
The File Open (for instance) menu item is already assigned, it sends
openDocument: to FirstResponder. I can see it right there in the
bindings, that menu item is already set up to call something.
Yes I suppose I could write my own enti
On 16/04/2008, at 6:51 PM, parag vibhute wrote:
Hi Ron,
Ya it is right that I will need to implement the networking
functionality for sending feedback from my application to server.
But I wanted to know that has Apple mentioned some guideline for
this? I would like to follow those guidel
but they are already assigned to .. the first responder I think. And
they are disabled menu items too .. what enables them?
On Apr 16, 2008, at 5:26 PM, Ramón Medrano Llamas wrote:
It's easy, you must assign in Interface Builder an action to those
menu items that do the tasks you want.
2
On 16 Apr 2008, at 03:29, Michael Ash wrote:
On Tue, Apr 15, 2008 at 4:53 PM, Greg Parker <[EMAIL PROTECTED]>
wrote:
You don't need a write barrier when erasing GC-scanned memory. The
write
barrier helps the collector see pointers that it might otherwise miss
because it's cheating. It does
First post. I've been dragging my way through the Cocoa documentation
and trying some simple apps. I started with non-document apps and of
course you still get the File menu, but most of it's disabled. I
understand that when you create a document-based app (and I have a lot
more reading to
Hi Ron,
Ya it is right that I will need to implement the networking functionality
for sending feedback from my application to server. But I wanted to know
that has Apple mentioned some guideline for this? I would like to follow
those guideline.
Thanks,
Palav
On Wed, Apr 16, 2008 at 2:15 PM, Ron
NSValue has two methods: value:withObjCType: and
valueWithBytes:objCType: .
What is the difference between these two methods? When do I have to
use the first, when the second?
I am rather confused.
Kind regards,
Gerriet.
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Cocoa-dev mailing l
Hi all,
Like many cell phones are doing these days, I want to
be able to detect phone numbers in NSStrings and
highlight them in some way for the user.
So, if I had some text, say : "Hi Tom, Please call
Cheryl at 444-555-6767 and she can get you that
info..." I want to be able to "know" that 444
On 16/04/2008, at 6:19 PM, parag vibhute wrote:
Thanks for url.
But this & earlier urls which I received in this thread are for
tutorials
for making an application like stuff. What I require is adding native
functionality by using which user will send feedback regarding that
application. I w
On Apr 16, 2008, at 9:06 AM, Jean-Daniel Dupas wrote:
I don't want to start another "Code design" war, but just wonder if
doing "Utility Class" is a common practice in obj-c. Unlike Java or
other object oriented language, obj-c is a superset of C and support
simple functions. Wouldn't it be
Thanks for url.
But this & earlier urls which I received in this thread are for tutorials
for making an application like stuff. What I require is adding native
functionality by using which user will send feedback regarding that
application. I would like to know has Apple mentioned some guidelines
Le 16 avr. 08 à 09:23, Antonio Nunes a écrit :
Hi,
I've put together a simple wrapper to easily change the system sound
volume using Objective-C, obviating the need to deal directly with
lower-level CoreAudio calls.
The files are available here:
http://sintraworks.com/media/code/ANSyste
On Wed, Apr 16, 2008 at 1:17 AM, Mario Gajardo Tassara
<[EMAIL PROTECTED]> wrote:
>
> El 15-04-2008, a las 14:21, [EMAIL PROTECTED] escribió:
>
>
> >
> > > I have a nasty leak problem when i realloc several methods of the main
> class of my app.
> > >
> >
> > Without seeing your code, all I can s
Le 16 avr. 08 à 00:07, John Stiles a écrit :
Hmm, set sounds a lot easier than this to me.
Just use insert to put all the doubles into the set (one line), then
use lower_bound to find the delineations between each group (another
one-liner, though of course you'll need to loop over the nu
Le 16 avr. 08 à 04:14, Michael Ash a écrit :
On Tue, Apr 15, 2008 at 5:38 PM, Jean-Daniel Dupas
<[EMAIL PROTECTED]> wrote:
If you need a storage that provide binary search, you can probably
use a
CFBinaryHeap.
"CFBinaryHeap implements a container that stores values sorted
using a
binary
On Apr 16, 2008, at 12:03 AM, Stephane Huaulme
<[EMAIL PROTECTED]> wrote:
when I try to fetch a web page on an internal server using:
[NSString stringWithContentsOfURL:[NSURL URLWithString: theURLString]
encoding:NSASCIIStringEncoding error:&theError];
I get the following error:
{contents
On Apr 16, 2008, at 12:18 AM, Quincey Morris wrote:
If you're doing this in the context of populating the data model
(e.g. creating nodes when initializing a new document), you'd
probably want to do it by brute force: create the model data, then
examine suitable rows of the outline view (pos
Hi,
I've put together a simple wrapper to easily change the system sound
volume using Objective-C, obviating the need to deal directly with
lower-level CoreAudio calls.
The files are available here:
http://sintraworks.com/media/code/ANSystemSoundWrapper.zip
The wrapper consists of a singl
On Apr 15, 2008, at 19:48, Markus Spoettl wrote:
I have a NSDocument subclass with a simple tree structure attached
to an NSOutlineView via NSTreeController and bindings. I learned -
through this list - to add items in KVO compliant way like this
TreeNode *node = [[TreeNode init] alloc];
[
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