This fixes the FPDB main window visibility with window managers that use
workspaces instead of virtual desktop(s). On such a system the
application receives WINDOW_STATE_ICONIFIED event when the workspace is
switched. This hides the window.
It wouldn't be too big a problem if the window wouldn't occasionally get
stuck in a "hide-me-loop", where any attempt to unhide/present the
window again triggers the hide routine. The two state events, _ICONIFIED
and _WITHDRAWN are not the same or even mutually exclusive. As such the
old event mask test simply did not cover all the possibilities.
Also, the property 'visible' does not necessarily match reality. It can
be set to true for iconified windows, and false to a visible window. So
a better solution is to not rely on the property, but just track the
wanted visibility state in our own code.
After this simple refactoring, the application window finally seems to
behave properly. [Also, widget.present() automatically calls .show(), so
we can kill one redundant operation.]
Mika Bostrom
bf2eaa772c
