IconRef and NSImageRep
IconRef and NSImageRep
- Subject: IconRef and NSImageRep
- From: David Catmull <email@hidden>
- Date: Wed, 19 Dec 2007 11:14:56 -0800
I'm trying to make an NSImageRep subclass that draws IconRefs, but it
isn't working - nothing appears on the screen.
I get the IconRef by calling
GetIconRef
(kOnSystemDisk,kSystemIconsCreator,kGenericFolderIcon,&iconRef), which
succeeds by all appearances.
Then I have this method in my NSImageRep subclass:
-(void)draw
{
NSSize mySize = [self size];
CGRect drawRect = CGRectMake(0,0,mySize.width,mySize.height);
PlotIconRefInContext((CGContextRef)[[NSGraphicsContext
currentContext] graphicsPort],
&drawRect
,kAlignNone,kTransformNone,NULL,kPlotIconRefNormalFlags,iconRef);
}
In the debugger, mySize and drawRect have the expected values
(0,0,48,48), but nothing draws. This is in a table cell, and other
cells that use images loaded from files appear correctly.
Originally I used [NSWorkspace iconForFileType:], but the resulting
image didn't draw well at 48x48. It appeared to be scaled down from
the 128x128 image with no smoothing applied. I tried it with and
without using setScalesWhenResized.
So, what could I be doing wrong in my NSImageRep? Should I go back to
the NSWorkspace approach and try something different?
Thanks,
--
David Catmull
email@hidden
http://www.uncommonplace.com/
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