Re: Gtk::DrawingArea with Cairomm from Glade - no Event

[Lyle Underwood <lyleunderwood gmail com>]

set_events basically does currentEventMask = newEventMask, whereas
add_events basically does currentEventMask |= newEventMask. I'm pretty
sure there are some low-level events in there by default that do
SOMETHING. Like STRUCTURE and stuff, I don't even know.

On Thu, 2010-01-28 at 20:16 +0100, Andreas Volz wrote:
> Am Thu, 28 Jan 2010 10:45:14 -0800 schrieb Lyle Underwood:
> 
> Hello Lyle,
> 
> thanks for this hint. It works nice nice. From the docs I really don't
> see the difference between add_events and set_events...
> 
> regards
> 	Andreas
> 
> > You don't need an event box. I inherited from Gtk::DrawingArea and put
> > this in the constructor:
> > 
> > this->add_events(Gdk::POINTER_MOTION_MASK
> > 		| Gdk::POINTER_MOTION_HINT_MASK
> > 		| Gdk::BUTTON_PRESS_MASK
> > 		| Gdk::LEAVE_NOTIFY_MASK);
> > 
> > Obviously I wanted to track the pointer motion as well ( for my
> > rudimentary drawing app ). Also, make sure your DrawingArea is
> > sensitive.
> > 
> > On Thu, 2010-01-28 at 19:24 +0100, Andreas Volz wrote:
> > > Hello,
> > > 
> > > I placed a Gtk::DrawingArea in Glade and realized it with cairomm.
> > > All drawing on this surface works, but I get only expose events.
> > > Even if I overwrite the on_event() functions I see not any more
> > > events. I'm interested in the mouse button/position events. My
> > > first idea was to use 
> > > 
> > > set_events (Gdk::EXPOSURE_MASK | Gdk::BUTTON_PRESS_MASK |
> > > Gdk::BUTTON_RELEASE_MASK);
> > > 
> > > but this results in:
> > > 
> > > (state:15062): Gtk-CRITICAL **: gtk_widget_set_events: assertion
> > > `!GTK_WIDGET_REALIZED (widget)' failed
> > > 
> > > Do I have to place my Gtk::DrawingArea in a Gtk::EventBox o catch my
> > > mouse events? Any other hints?
> > > 
> > > regards
> > > 	Andreas
> > > _______________________________________________
> > > gtkmm-list mailing list
> > > gtkmm-list gnome org
> > > http://mail.gnome.org/mailman/listinfo/gtkmm-list
> > 
> > 
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