Currently (and since many versions of gtk+) when a GtkExpander is not expanded, all its content still react to mouse actions. So when moving up/down a page with mouse wheel, all what is inside the not expanded GtkExpander are reacting (spinbuttons change values, combobox change values...). The mouse pointer should be at the place where the widget should have been visible if the GtkExpander was expanded. This is very annoying. So I manage myself this behavior (I make the expander content not sensitive when it is not expanded). This is cumbersome since I have many expanders. Is this made on purpose ? Should I report a bug ?
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