[Urwid] How to detect that urwid lost focus ?

Ian Ward ian at excess.org
Sun Jun 19 18:12:57 EDT 2011

On 06/19/2011 04:55 PM, goffi wrote:
> G'day everybody,
> is there a way to detect that Urwid lost focus ? I mean when the user
> leave the term, not just changing the widget with focus.
> For my XMPP client, I'd like to know when the user is not on the term to
> show notifications when somebody is writing to him.
> My idea is to detect if we are on X, use Xlib to detect the focus
> windows, and look for the term name or my app name in the window title,
> but it seems a big hacky. Is there a more elegant way to do that ?

sure, if you're willing to rely on having a connection to an X server 
you can get all sorts of focus events.  Try running xev, you can see 
things like

  VisibilityNotify event, serial 34, synthetic NO, window 0x5600001,
      state VisibilityFullyObscured


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