Re: NSScroller in layer backed view
Re: NSScroller in layer backed view
- Subject: Re: NSScroller in layer backed view
- From: Raleigh Ledet <email@hidden>
- Date: Fri, 18 May 2012 13:06:37 -0700
Do not override drawRect:! Override the parts drawing methods:
– drawKnobSlotInRect:highlight:
– drawKnob
https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ApplicationKit/Classes/NSScroller_Class/Reference/Reference.html
-raleigh
On Apr 3, 2012, at 12:47 AM, Ryan Joseph <email@hidden> wrote:
> I've just started using CoreAnimation for fading views and simple things like that but now I've run across a problem with NSScroller.
>
> In a view which is layer backed (setWantsLayer is on) I have a NSScrollView with a custom NSScroller subclass which performs drawing in drawRect:. When the root views setWantsLayer is on the drawRect: method of the NSScroller subclass is never called. The docs did say drawRect: will not be invoked in layer backed views but I'm confused because another NSView subclass in the same layer backed view is getting drawRect: invoked.
>
> Either way, from what I know about CoreAnimation I probably need to make a CALayer to replace the layer which (presumably) NSScroller is using since drawRect: is not being invoked. However, making a new CALayer (setting it to the NSScroller with setLayer) and overriding drawInContext: is not replacing the original NSScroller drawing.
>
> Does anyone know how I can acheive custom drawing of the NSScroller in the layer backed view?
>
> Thanks for any ideas you may have.
>
> Regards,
> Ryan Joseph
> thealchemistguild.com
>
>
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