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Re: Saving unseen NSView with subviews to NSImage

Subject: Re: Saving unseen NSView with subviews to NSImage
From: Rob Keniger <email@hidden>
Date: Tue, 30 Dec 2008 16:22:35 +1000
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On 30/12/2008, at 4:11 PM, John Kestner wrote:

So am I right in believing that drawRect: should not need to be explicitly called in each subview from within my custom view's drawRect:? In any case, see if you can make sense of this...

Seems way too complicated to me. I have this in a category on NSView, which returns an NSImage of the view's content, including all subviews:

-(NSImage*) bitmapImageInRect:(NSRect) rect { NSBitmapImageRep* imageRep=[self bitmapImageRepForCachingDisplayInRect:rect]; NSGraphicsContext *previousContext = [NSGraphicsContext currentContext]; [NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithBitmapImageRep:imageRep]]; [[NSColor clearColor] set]; NSSize imageRepSize = [imageRep size]; NSRectFill(NSMakeRect(0, 0, imageRepSize.width, imageRepSize.height)); [NSGraphicsContext setCurrentContext:previousContext]; [self cacheDisplayInRect:rect toBitmapImageRep:imageRep]; NSImage* bitmapImage=[[NSImage alloc] initWithSize:rect.size]; [bitmapImage addRepresentation:imageRep]; return bitmapImage; }

You could of course modify this to return the NSData from a - representationUsingType:properties: call on the NSBitMapImageRep.

--
Rob Keniger

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References:
	>Saving unseen NSView with subviews to NSImage (From: John Kestner <email@hidden>)
	>Re: Saving unseen NSView with subviews to NSImage (From: John Kestner <email@hidden>)
	>Re: Saving unseen NSView with subviews to NSImage (From: "I. Savant" <email@hidden>)
	>Re: Saving unseen NSView with subviews to NSImage (From: John Kestner <email@hidden>)
	>Re: Saving unseen NSView with subviews to NSImage (From: "I. Savant" <email@hidden>)
	>Re: Saving unseen NSView with subviews to NSImage (From: John Kestner <email@hidden>)

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