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Re: NSView puzzle

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Re: NSView puzzle

Subject: Re: NSView puzzle
From: Graham Cox <email@hidden>
Date: Fri, 10 Oct 2008 10:05:54 +1100


On 10 Oct 2008, at 7:17 am, DKJ wrote:

- (void)mouseDown:(NSEvent *)ev {

	click = [self convertPoint:[ev locationInWindow] fromView:nil];
	[self display];
}

Don't call [self display]. Instead, call [self setNeedsDisplay:YES]; While the above will work, it's not the recommended way to update the view.

- (void)drawRect:(NSRect)rect { NSImage *board = [[NSImage alloc] initWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"chessboard" ofType:@"tiff"]]; [board drawInRect:[self bounds] fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:0.5]; *** [str drawAtPoint:click withAttributes:dict]; }

This is leaking the 'board' image every time you draw it. You need to move the loading of the board image elsewhere - the -initWithFrame: method would probably be a good place - then you can redraw the same object in -drawRect:

hth,

Graham
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  >NSView puzzle (From: DKJ <email@hidden>)




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