On May 30, 2006, at 7:12 AM, Jo Meder wrote:
I was wondering how to get the "main" area of a control for use with HIView tracking areas. HIViewNewTrackingArea() lets you pass NULL for the inShape param, which does actually cause the entire structure region to be used which is fair enough, but this doesn't give a particularly desirable area for some controls. For example, if you do it on pushbutton then when you move the mouse over the button from below you get the mouse entered event when the mouse hits what looks like somewhere a little outside the edge of the shadow area under the button. It seems to me that getting the event when the mouse actually moves over the button itself would be a bit better.
I found HIViewCopyShape() but am not sure if any of the part constants would give me what I'm looking for. Perhaps I'm just better off using the entire structure region, given the potential variety in the shapes of different regions of a control ?
If you don't want to use the structure area of the control, then your next best bet might be to use a specific control part code with GetControlRegion. A good choice would be kControlClickableMetaPart or kControlOpaqueMetaPart.
