look at the ScrollViewSuite example.. specifically the tiling one. techniques 
illustrated.


On Jan 21, 2010, at 12:39 PM, vincent habchi wrote:

> Hi to all,
> 
> I'm trying to write a (at that time) simple GIS-like application based on 
> Cocoa. For each cartographic layer, I use a CALayer object, which is nice to 
> control things like opacity in real-time.
> 
> However, I'm facing a challenge: when the user move the mouse, the drawing 
> must move accordingly, feeling in white spaces that appear when updating the 
> position property. However, to feel in those spaces, the app must be able to 
> draw on it, thus the layer shall be resizable in every four direction, 
> including left and below, while maintaining the existing drawing unchanged. 
> I've tried to move the anchor point around and modify bounds or frame, but to 
> no avail: or I get no extension, or I have a transitory motion corresponding 
> to a bound property change (is there a way to disable the implied 
> CASimpleAnimation?). So, put briefly, is there a way to extend a CALayer in 
> whatever direction while keeping its content unmoving?
> 
> Thanks!
> Vincent_______________________________________________
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