> I am working on Motif code, so please excuse if this mailing list is > not the right place for asking my question, but since Motif is based on > libXt, I thought I'll give it a try. -- > > I would like to add and remove CascadeButtons dynamically to and from > a menubar (a.k.a RowColumn widget). > > For each addition of a button I create a completely new menubar > containing the button(s) to be added and set it in the MainWindow via: > > XtVaSetValues(main_window, XmNmenuBar, new_menubar, NULL); > > The good news is that the program does not crash :) but the menubar is > not updated either. Only when I resize the application window does the > menubar get updated and displays the new button(s). > > So my question is: How can I trigger the reconfiguration of a widget's > geometry without having to resize the main window?
The XmUpdateDisplay() function does exactly this. Call it with the top level widget as parameter.