Re: Problem with EventBox enter/leave_notify_event and Buttons

[Valentín <valentin sanva net>]

Hello Jannis!

This has nothing to do with vertical pointer movement vs. horizontal
> pointer movement.

Yes, I know, I was only trying to explain the situation --vertically between
EventBox vs. horizontally within the same EventBox, since I have all
EventBox widgets arranged in a VBox.

I recently had to solve the same problem (having an icon, a label
> and a button in an event box). First of all, what it sounds like
> you're trying to do is control the prelight state of the event
> boxes and render their content differently when they are prelit.
>
> What you can do to achieve this is override the enter_notify and
> leave_notify handlers. In enter_notify, set the state to prelight. In
> leave_notify, check whether the pointer has moved to the button or
> whether it has left the event box entirely. You can do that with a
> combination of gtk_widget_get_pointer() and gdk_window_get_geometry().
>
> Here's how I did it in Thunar:
>
>
> http://git.xfce.org/xfce/thunar/tree/thunar/thunar-shortcut-row.c?h=jannis/new-shortcuts-pane#n688
>
> Hope this helps,

Yes! That have helped a lot. I've already managed to fix it thanks to you.

Thanks a lot!! :)

And also thanks to you Bill for your suggestion.

2011/7/27 Jannis Pohlmann <jannis xfce org>

> Hi,
>
> On Tue, 26 Jul 2011 21:07:56 +0200
> Valentín <valentin sanva net> wrote:
>
> > Hello!!
> >
> > I have a problem with enter_notify_event and leave_notify_event. Let
> > me explain:
> >
> > I have an VBox with 5 EventBox widgets, and inside each EventBox I
> > have a HBox with one Label and 2 Buttons. I connect the signals
> > enter_notify_event and leave_notify_event of each of the EventBox
> > widgets to a callback and everything seems to work well: If you move
> > the mouse pointer vertically between EventBox widgets you can see the
> > events --I print a message from those mentioned callbacks, and I also
> > modify the Labels making their text bold on enter_notify_event and
> > normal on leave_notify_event.
> >
> > But If you move the mouse pointer horizontally --within the same
> > EventBox-- you'll also get enter/leave_notify_events, and this
> > shouldn't happen since the mouse pointer is always inside the
> > EventBox. More precisely, you'll get a leave_notify_event when moving
> > the pointer to a button (although the button is a child of the
> > EventBox) and the corresponding enter_notify_event when going back
> > from the button's area to another area also inside the EventBox.
>
> This has nothing to do with vertical pointer movement vs. horizontal
> pointer movement. As soon as you hover the button inside the event box
> you'll get a leave notify event. That's normal and it only  happens
> with widgets that have a GdkWindow (such as GtkButton).
>
> I recently had to solve the same problem (having an icon, a label
> and a button in an event box). First of all, what it sounds like
> you're trying to do is control the prelight state of the event
> boxes and render their content differently when they are prelit.
>
> What you can do to achieve this is override the enter_notify and
> leave_notify handlers. In enter_notify, set the state to prelight. In
> leave_notify, check whether the pointer has moved to the button or
> whether it has left the event box entirely. You can do that with a
> combination of gtk_widget_get_pointer() and gdk_window_get_geometry().
>
> Here's how I did it in Thunar:
>
>
> http://git.xfce.org/xfce/thunar/tree/thunar/thunar-shortcut-row.c?h=jannis/new-shortcuts-pane#n688
>
> Hope this helps,
> Jannis
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