Re: [GREAT]NSScroller trackKnob
Re: [GREAT]NSScroller trackKnob
- Subject: Re: [GREAT]NSScroller trackKnob
- From: Graham Cox <email@hidden>
- Date: Fri, 19 Nov 2010 15:05:07 +1100
On 19/11/2010, at 2:51 PM, email@hidden wrote:
> Next question ... how do I get called for the buttons (line up down) and the page up down?
You should be called for all of the parts of the scroller. You can call -hitPart to find out which part of the control was hit. (I just found this out by reading the class documentation, why don't you try that?)
The usual MO is to set the range of the scroller to the total height of the view to be scrolled, less the height of the frame through which it is viewed. You change the value of the scroller to the amount you want to scroll, typically one line (however you define it) for the buttons and one page for the page regions. By using setKnobProportion: you can have a proportional knob as well.
--Graham
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