[PyQt] An "UI update" event/signal to update the GUI on

[eliben]

Hello,

I'm porting some code from wxPython to PyQt, and am unable to find the
replacement for wx's wx.EVT_UI_UPDATE event. This event is sent to a
frame/window whenever the UI has to be updated. In the handler of the event
I can check my application's state and update the widgets accordingly (for
instance, disable some buttons, enable others, etc). This save code versus
the approach of having a separate update handler for each widget.

Please recommend an equivalent way to achieve this in PyQt.

Thanks in advance
Eli
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