Kevin, thanks for that. This was exactly the problem. My text view subclass
asks its delegate for an undo manager, and I forgot to implement the delegate
method in this particular document subclass.
Many thanks!
Martin
On May 23, 2012, at 07:00 PM, Kevin Perry wrote:
>
> On May 23, 2012, at
Hello all.
I have an app which the user can transform an image (rotate,
translate, scale), On top of this image is an image has, so mostly the
user fits in the mask the portion of the image that he wants.
Then I need to compose an image based on what is inside the mask.
Problem is that the compos
Thank you for your replies. I appreciate your comments.
Maybe you are interested in the background, and way I'm asking this. In fact,
as some of you suspected, the reason for asking has to do with performance.
The NSMutable data shall serve as an internal buffer of some "Streambuffer"
class wh
I have need of rendering text manually to a UIView, along with graphics.
I realise that I could probably use a UITextView as a subview and
position it, but for now I'd like to learn the right way to render it
manually.
My aim is to render a particular string in a particular colour, in a
parti
Without Arc, this:
NSString *s = [ [ NSString alloc ] initWithFormat: ...];
[ someCollection addObject: s ];
[ s release ];
is clearly more efficient (because not using autoreleasepools) than:
NSString *s = [ NSString stringWithFormat: ...];
[ someCollection addObject: s ];
But what about Arc?
Jason,
Have a look at this doc-page:
https://developer.apple.com/library/mac/ipad/#documentation/graphicsimaging/conceptual/drawingwithquartz2d/dq_text/dq_text.html
It discusses your options when drawing text with Quartz2D, and also mentions
other techniques. One option of note is the NSString ad
I have an abstract class M with subclasses MAB, MAX, MXB.
There are several lengthy methods A which are used in MAB and MAX, and others
methods B which are used in MAB and MXB.
Methods A use a property NSUInteger index.
Class MXB has no such property, is has NSIndexSet *indices instead.
Similar
Greetings Jason,
On 5/24/12 12:49 AM, Jason Teagle wrote:
> I have need of rendering text manually to a UIView, along with graphics.
> I realise that I could probably use a UITextView as a subview and
> position it, but for now I'd like to learn the right way to render it
> manually.
Please see t
Turn it into two separate protocols instead, and adopt whichever protocols are
needed in the concrete implementations. Or if one protocol is a superset of the
other, a protocol can extend another.
--Graham
On 24/05/2012, at 7:14 PM, Gerriet M. Denkmann wrote:
> Other, better solutions?
Implement abstract classes that implement the methods, then use the runtime to
copy the methods into the classes that should have them in +initialize.
Bob
On 24 May 2012, at 10:14, Gerriet M. Denkmann wrote:
> I have an abstract class M with subclasses MAB, MAX, MXB.
>
> There are several leng
Hello everyone, I'm displaying a PDF in an UIWebView object, is there
a way to access the page number displayed when scrolling?
--
Regards,
Takeichi Kanzaki Cabrera
Linux Registered User #308138
If you want to be original,
be your self.
___
Cocoa-dev
Have a look at this doc-page:
https://developer.apple.com/library/mac/ipad/#documentation/graphicsimaging/
>conceptual/drawingwithquartz2d/dq_text/dq_text.html
It discusses your options when drawing text with Quartz2D, and also mentions
>other techniques.
>One option of note is the NSString ad
You probably want UILabel. UITextView is a much more heavyweight class
that supports editing as well as display.
(My bad, a label is called a TextView on Android - got mixed up.)
These both are just wasting CPU cycles and adding extraneous code.
Simply use:
NSString *textToDraw = @"my stri
I have been battling a retain cycle for a couple of hours, assuming I am at
fault, but I am starting to think there is something fishy going on. Can
anybody advise?
- I have a window controller subclass (and associated window) A, and a separate
window controller subclass (and associated window)
> CGContextShowTextAtPoint(contextRef, 0, 40,
> [textToDraw UTF8String], [textToDraw length]);
One bug I see here: you're passing a wrong length parameter.
CGContextShowTextAtPoint expects the length of the char array (number of bytes
of the UTF-8 encoded string), but you'e passing the numb
On 24 May 2012, at 9:26 AM, Jonathan Taylor wrote:
> - I have a window controller subclass (and associated window) A, and a
> separate window controller subclass (and associated window) B. B contains a
> property, designated 'retain', that keeps a pointer to A. B is
> programatically closed fir
On May 24, 2012, at 10:21 AM, Fritz Anderson wrote:
> On 24 May 2012, at 9:26 AM, Jonathan Taylor wrote:
>
>> - I have a window controller subclass (and associated window) A, and a
>> separate window controller subclass (and associated window) B. B contains a
>> property, designated 'retain', t
On 24 May 2012, at 15:36, Manfred Schwind wrote:
>> CGContextShowTextAtPoint(contextRef, 0, 40,
>> [textToDraw UTF8String], [textToDraw length]);
>
> One bug I see here: you're passing a wrong length parameter.
> CGContextShowTextAtPoint expects the length of the char array (number of
> byte
On May 24, 2012, at 3:14 AM, Gerriet M. Denkmann wrote:
> Without Arc, this:
>
> NSString *s = [ [ NSString alloc ] initWithFormat: ...];
> [ someCollection addObject: s ];
> [ s release ];
>
> is clearly more efficient (because not using autoreleasepools) than:
>
> NSString *s = [ NSString str
On May 24, 2012, at 10:26 AM, Jonathan Taylor wrote:
> I have been battling a retain cycle for a couple of hours, assuming I am at
> fault, but I am starting to think there is something fishy going on. Can
> anybody advise?
>
> - I have a window controller subclass (and associated window) A, a
On May 24, 2012, at 9:36 AM, Manfred Schwind wrote:
>> CGContextShowTextAtPoint(contextRef, 0, 40,
>> [textToDraw UTF8String], [textToDraw length]);
>
> One bug I see here: you're passing a wrong length parameter.
> CGContextShowTextAtPoint expects the length of the char array (number of
>
On May 24, 2012, at 10:36 AM, Manfred Schwind wrote:
>> CGContextShowTextAtPoint(contextRef, 0, 40,
>>[textToDraw UTF8String], [textToDraw length]);
>
> One bug I see here: you're passing a wrong length parameter.
Another bug: CGContextShowztextAtPoint takes characters encoded in MacRoman,
On May 24, 2012, at 4:14 AM, Gerriet M. Denkmann wrote:
> I have an abstract class M with subclasses MAB, MAX, MXB.
>
> There are several lengthy methods A which are used in MAB and MAX, and others
> methods B which are used in MAB and MXB.
>
> Methods A use a property NSUInteger index.
> Class
On May 24, 2012, at 12:43 AM, Andreas Grosam wrote:
> While I experienced, that this approach is much faster than appending bytes
> using NSMutableData methods, the above implementation could be still better
> when having something like a -capacity method for a NSMutableData object
> which is
Implement both A and B in the base class M, but don't declare them in its
@interface. Then MAB and MAX can both declare method A and have implementations
that just call super. Likewise for B.
Or, factor out A into a helper class, and similarly for B. Then have MAB and
MAX instantiate an A helpe
On May 24, 2012, at 5:50 AM, Jason Teagle wrote:
> (I've since discovered that the %@ and @"xxx" way works just fine, so I'll
> stick with that.
Good :) The problem with using "%s" is that it doesn't work well with non-ASCII
characters. Cocoa has to assume some character encoding to map the by
On May 24, 2012, at 9:26 AM, Jonathan Taylor wrote:
> There appears to be some weird runtime voodoo behind the scenes involving
> NSAutounbinder, which I think is what should ultimately be sending the final
> release to A. That is what sends the final release to B, but that final
> release for
On 24 May 2012, at 16:27, Kyle Sluder wrote:
>> 1. If I do not set B's pointer to A, both A and B are deallocated correctly
>> 2. If instead I set B's pointer to A, but reset it to nil just before B is
>> closed, both A and B are deallocated correctly
>> 3. If instead B still has a live pointer to
On May 24, 2012, at 2:49 AM, Jason Teagle wrote:
> First, a quick question about +stringWithFormat: If I want to have a literal
> string as one of the parameters to the format, which is correct / best:
>
> NSString *textToDraw = [NSString stringWithFormat: @"%s",
> "my string"];
>
> or
>
On 24 May 2012, at 17:37, Graham Cox wrote:
> Turn it into two separate protocols instead, and adopt whichever protocols
> are needed in the concrete implementations. Or if one protocol is a superset
> of the other, a protocol can extend another.
I thought that a protocol only declares methods
On May 24, 2012, at 12:19 AM, Gustavo Adolfo Pizano wrote:
> For the transformation I'm using gesture recognizers.
> when I want to compose the image this is are the steps I'm doing
>
> UIGraphicsBeginImageContext(size) //size is a CGSize with 900x567
> CGContextRef ctx = UIGraphicsGetCurrentCon
On May 24, 2012, at 4:05 AM, Takeichi Kanzaki Cabrera wrote:
> Hello everyone, I'm displaying a PDF in an UIWebView object, is there a way
> to access the page number displayed when scrolling?
Nope.
--
David Duncan
___
Cocoa-dev mailing list (Cocoa-
On May 24, 2012, at 1:14 AM, Gerriet M. Denkmann wrote:
> Without Arc, this:
>
> NSString *s = [ [ NSString alloc ] initWithFormat: ...];
> [ someCollection addObject: s ];
> [ s release ];
>
> is clearly more efficient (because not using autoreleasepools) than:
>
> NSString *s = [ NSString str
On May 24, 2012, at 4:15 AM, Gerriet M. Denkmann wrote:
> How do I avoid duplicating method implementations using a protocol?
You don't, other than by using techniques like the ones I described. Protocols
are just for the convenience (and type-safety) of the _users_ of a class; they
don't real
Thanks for all the replies regarding %s vs. %@, and the rather
disastrous attempt at using CGContextXXX methods. Even if I had fixed
all the other issues, I was using CGContextSelectFont incorrectly
anyway. I didn't have a hope. That, unfortunately, is down to
documentation not being complete /
On 24 May 2012, at 1:57 PM, Jason Teagle wrote:
> If the CGContextXXX methods shouldn't be used, then they shouldn't be in the
> API - or should be marked as deprecated. There's nothing in the docs (with
> Xcode 3.X, at least - maybe it's changed since) to indicate that these were
> the worst w
How does one create and then receive a user defined event?
I have read and find only what appears to me to be heavyweight processes.
So if I create an NSEvent and then use postEvent:atStart what I am not getting
is how is a method in an object associated with the NSEvent?
Or should I just fuge
On 25/05/2012, at 10:58 AM, koko wrote:
> How does one create and then receive a user defined event?
>
> I have read and find only what appears to me to be heavyweight processes.
>
> So if I create an NSEvent and then use postEvent:atStart what I am not
> getting is how is a method in an obje
Can you point me to the docs that cover pulling events off the queue?
Thanks.
-koko
On May 24, 2012, at 7:56 PM, Graham Cox wrote:
> Another object will pull events off the queue.
___
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not
[NSWindow nextEventMatchingMask:untilDate:inMode:dequeue:]
[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
On 25/05/2012, at 12:40 PM, koko wrote:
> Can you point me to the docs that cover pulling events off the queue?
>
> Thanks.
>
> -koko
>
> On May 24, 2012, at 7:56 PM
On May 24, 2012, at 11:53 PM, Graham Cox wrote:
> On 25/05/2012, at 12:40 PM, koko wrote:
>
>> On May 24, 2012, at 7:56 PM, Graham Cox wrote:
>>
>>> Another object will pull events off the queue.
>>
>> Can you point me to the docs that cover pulling events off the queue?
>
> [NSWindow nextEve
Hi,
I'd like to reveal/select multiple items in the Finder.
NSWorkspace only handles single files as in
[[NSWorkspace sharedWorkspace] selectFile:currentFilePath
inFileViewerRootedAtPath:currentFilePath];
I searched Google and tried to pick up every scra
42 matches
Mail list logo
