Re: GtkButton 'enter' and 'leave' signal emission oddity

[Owen Taylor <otaylor redhat com>]

"T.C. Gubatayao" <TCG BardenEnt com> writes:

> I'm working with gtk+-2.0.8 on FreeBSD 4.7-STABLE (noticed this in
> gtk+-2.0.7 as well, though).
>  
> The signals 'enter' and 'leave' work as expected for mouse movement over
> the button, but the unexpected behavior is when a GtkButton is pressed.
> If you create a program and use g_signal_connect () to attach to of the
> signals, for each click of the button, the signals are emitted in the
> following order:
>  
> leave
> enter
> pressed
> clicked
> released
>  
> Why are the signals 'leave' and 'enter' emitted when the mouse has not
> left the button?

Actually the relevant thing here that you haven't mentioned here
is that you are using Metacity. The way Metacity does click-to-focus
causes these spurious leave/enter events. 

The problem could be reduced a lot by making Metacity remove it's 
XGrabButton() on the currently focused toplevel.

(In general, you don't want to connect to ::enter ::leave - they
are details of how the button work that wouldn't be exposed if
we were doing GtkButton again from scratch.)

Regards,
                                        Owen