Re: [matplotlib-devel] help request: wx, tk, qt backend leave event

[Darren D. <dsd...@gm...>]

On Wed, Nov 26, 2008 at 2:05 PM, John Hunter <jd...@gm...> wrote:

> I recently added support for a figure/axes enter/leave event.  The
> figure enter and axes enter/leave are easy to do with nothing new in
> the backends, just using the native mpl events.  The figure leave
> event is harder, because when a user leaves a figure and activates
> another window, mpl gets no events.
>
> To correct this, I added a leave_notify_event method to
> backend_bases.FigureCanvasBase (note this is not an mpl Event) but
> when called it will trigger a callback to those registered to the
> figure_leave_event with the last event that occurred in the window.
>
> I added support for this in gtk by connecting the the gtk signal
> 'leave_notify_event' to the mpl backend method leave_notify_event.  If
> you know something about tk, wx or qt event handling, could you add a
> similar method to the appropriate backend?  You can follow the example
> in backend_gtk.
>
>
> You can test with examples/event_handling/figure_axes_enter_leave.py
>

I implemented this in backend_qt4.

Darren