draw vs. composite image in drawRect

[Riccardo Mottola]

Hi,

I have subclassed NSProgressIndicator and want to draw totally my own 
stuff, actually, I just intend to draw an image.

Actually, I am adapting code that works in GWorkspace: there the 
indicator is a subclass in NSView, I want to make it as subclass of 
NSProgressView.

I do in drawRect:

      [img compositeToPoint: NSZeroPoint
                  operation: NSCompositeSourceOver]

however, it is not working.


if instead I do:


[img drawAtPoint:NSZeroPoint fromRect:NSZeroRect 
operation:NSCompositeSourceOver fraction:1];


it works! why?


Riccardo