Hi, I have created an General/NSButton subclass along with an General/NSButtonCell subclass. I am using this in an General/NSToolbar, however there is 2 problems.

1. When I run the toolbar customization palette I get the following:

* 2005-03-27 02:18:48.853 General/TestApp[16011] Exception raised during posting of notification. Ignored. exception: Window: discardTrackingRect called before adding rect

2005-03-27 02:18:48.854 General/TestApp[16011] *** Assertion failure in -General/[NSToolbarConfigPanel _discardTrackingRect:], General/AppKit.subproj/General/NSWindow.m:2796 *

I have heard that I need to removed my tracking rects here:

• (void)viewWillMoveToWindow:(General/NSWindow*)newWindow {

[super viewWillMoveToWindow:newWindow]; }

However I have not created any, the button created them from mousEntered: and mouseExited:.

1. When the toolbar customization palette resigns the button is drawn blank. This may be because of point 1.

Any help would be most appreciated.

-Julian

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Just pass the message up to super from your subclass implementation

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Resolved with use of custom tracking rects.