Trying to make a GTK+ 3 theme…
To make button “pressed” effect I use top, left +1 and bottom, right -1 approach with padding. Testing tool is gtk3-widget-factory.
Everything works fine, except in dialogs (font selector, file chooser bottom “OK”, “CANCEL”), where the whole upper part gets shifted also.
How to make button “pressed” effect in dialog without position change of other parts except button or button labels?