I'll just copy the code here for you:
NSRect visibleRect = [_oldContentView visibleRect];
NSBitmapImageRep *imageRep = [_oldContentView
bitmapImageRepForCachingDisplayInRect:visibleRect];
[_oldContentView cacheDisplayInRect:visibleRect toBitmapImageRep:imageRep];
http://developer.apple.com/library/mac/#samplecode/AnimatedTableView/Listings/ATPopupWindow_m.html
corbin
On Dec 21, 2010, at 1:08 PM, Corbin Dunn wrote:
> Hi Stephen,
> This was done in the AnimatedTableView demo app available on the dev site.
> Check it out and let me know if you need pointing to the particular part of
> code that does it.
>
> corbin
>
> On Dec 21, 2010, at 12:11 PM, Stephen Blinkhorn wrote:
>
>> Hi all,
>>
>> I'm trying to capture a view and its contents as an NSImage which I can
>> subsequently draw in the view. The idea is that I'm trying to 'freeze' the
>> view's content (custom sliders, buttons, menus etc) and present this image
>> in the view.
>>
>> I'm getting mixed results when attempting to render to a CFLayerRef e.g.:
>>
>> NSRect viewRect = [self bounds];
>>
>> [self lockFocus];
>> NSBitmapImageRep* rep = [[NSBitmapImageRep alloc]
>> initWithFocusedViewRect:viewRect];
>> [self unlockFocus];
>>
>> NSImage* image = [[NSImage alloc] initWithSize:viewRect.size];
>> [image addRepresentation:rep];
>> [image drawAtPoint:NSZeroPoint fromRect:viewRect
>> operation:NSCompositeSourceOver fraction:1.0];
>>
>> [image release];
>> [rep release];
>>
>>
>> Nothing appears to be drawn in the layer. Is there a better approach that
>> I'm missing?
>>
>> Thanks,
>> Stephen
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