Hi Peter,
NSScroller has the following methods that might help:
- (void)trackKnob:(NSEvent *)theEvent
- (void)trackScrollButtons:(NSEvent *)theEvent
I've never subclassed NSScroller, so can't comment on the havoc that
may ensue if you go down this path.
NSClipView also receives a notification when the document view
changes its frame during a scroll:
-(void)viewFrameChanged:(NSNotification *)notification;
This is the method I use to do things *during* a scroll.
Best,
Cathy
On Apr 2, 2008, at 10:25 AM, Peter Zegelin wrote:
I have a custom view inside a scrollview and need to modify the
clip view before a user begins to scroll as I have some custom
rulers built into my view. Is there any way of being notified when
a user is about to scroll? I tried overriding the mousedown of the
scrollview but was only able to trap a mousedown in the bottom
right corner, not in the scrollbars themselves.
thanks!
Peter
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