Hi Charlie, Chimera does force dialogs to unmap as an image is saved in order to give it the best chance of not having the graphics window obscured as the image is saved. We would like to move to a technology where image saving isn't directly tied to the visibility of the graphics window, but for now this is what we have. So your extension is doing something when the dialog unmaps that affects the displayed image? Are you sure you want to do it there rather than overriding the dialog's Cancel method (which will be called if the dialog is Closed or the window's 'X' button is clicked)? If you override Cancel, you need to make sure to call ModelessDialog.Cancel(self) in the overriding method. Another option is to respond to Chimera's 'unmapped' and 'mapped' triggers (which occur as Chimera forces child dialogs to unmap/map) to avoid changing the display for this kind of temporary dialog hiding. If you wrote a handler function like this: def myUnmap(self, *args): ... do something in response to temporary unmap... you would register the trigger handler with: chimera.triggers.addHandler('unmapped', myUnmap, None) Triggers and handlers are described here: http://www.cgl.ucsf.edu/ chimera/docs/ProgrammersGuide/Examples/Main_AtomTrigger.html Let me know if you need more info. --Eric On Mar 6, 2006, at 1:19 PM, Charlie Moad wrote:

I am using chimera.widgets.ModelOptionMenu in my plugin as suggested, but when I attempt to save a screen image its as if my plugin/the structure is being unmapped then mapped again. The tiles are rendered before my plugin reloads the interface. Is there a way I can programmatically destroy my plugin's instance so I can at least take a screenshot without anything changing? I poked around chimera.extension.manager without success.

Thanks, Charlie

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