change toggle button programatically (image processing toolbox)

I would like to toggle menu/toolbar items on/off programmatically for the implay function.
Specifically, I want to turn on the "Maintain Fit to View" item in the Menu:
set(findall(0,'tag','uimgr.spctogglemenu_Maintain'),'Checked','on');
Or, toggle the related icon in the toolbox
set(findall(0,'tag','uimgr.uitoggletool_Maintain'),'State','on');
These items do appear as changed in the menu/toolbar, but the callback functions do not execute like they do when the items are clicked on/off in the window.

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2015-2-11

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