Bernie,

This issue only occurs in 10.7 and just installing the handler below on the window eliminates the problem.  I don't do anything in the contentviewdraw handler fn.  

It is causing an issue when collapsing a window with a toolbar.  Lines are drawn erratically in the content region of the toolbar when it is collapsed using  fn ShowHideWindowToolbar( window ( _wndRef ), _false, _false )

Thanks 

Steve


On Sep 19, 2011, at 11:55 AM, Bernie wrote:

> 
> Steve wrote:
> 
>> When I drag a window from one monitor to another the background of the window is redrawn.   I cannot capture the event and haven't found it in the documentation.
>> 
>> What event should I be looking for?
> 
> If compositing window, I suppose you could install a control draw handler on its content view.
> 
> Bernie
> 
> '---------------
> include "Tlbx HIView.incl"
> include "Util_CE.incl"
> 
> local fn MyContentViewDrawHandler( nextHandler as EventHandlerCallRef, theEvent as EventRef, userData as pointer )
> '~'1
> // do something.....
> beep
> end fn = _noErr
> 
> dim as HIViewRef contentView
> appearance window 1,"Drag me", (0,0)-(480,360), _kDocumentWindowClass, _kWindowCompositingAttribute
> fn HIViewFindByID( fn HIViewGetRoot( window( _wndRef ) ), kHIViewWindowContentID, @contentView )
> fn CEAddEvent( _kEventClassControl, _kEventControlDraw )
> fn CEInstallControlEventHandler( contentView, @fn MyContentViewDrawHandler, NULL, NULL )
> RunApplicationEventLoop()
> '---------------
> 
> 
> 
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