Re: signal for an image

[muppet <scott asofyet org>]

On May 17, 2006, at 8:39 PM, David lacravate wrote:

> Hi ,
>
> En ce jour du Wed, 17 May 2006 19:00:40 +0100,
> Emmanuele Bassi <ebassi gmail com> parlait ainsi :
> > > i have a seemingly simple question . I'd like to click on an image
> > > (Gtk2::Image presumably) and have something happening (another image
> > > appearing) .
> > Put the Gtk2::Image inside a Gtk2::EventBox and connect to its
> > 'button-press-signal'; you might need to use  
> > Gtk2::Widget::add_events on
> > the event box, to add the 'button-press-mask'.
>
> Sorry , 'doesn't work !

...

> $event->signal_connect('clicked',sub{print "ok\n";});

"clicked" is a GtkButton signal, which aggregates the "button-press- 
event" and "button-release-event" signals.  The "clicked" signal does  
not exist in Gtk2::Widget or Gtk2::EventBox.

To catch a mouse button press, connect to "button-press-event".  To  
catch a mouse button release, connect to "button-release-event" (will  
require that you add "button-release-mask" to the EventBox's events).

The available signals for each widget are listed in the SIGNALS  
section of each object's manpage; signals are inherited, so also be  
sure to check the SIGNALS section of each class mentioned in the  
HIERARCHY section of the manpage.  For example, Gtk2::EventBox has no  
signals of its own; nor do Gtk2::Bin or Gtk2::Container; but they  
inherit a whole shedload of signals from Gtk2::Widget.

--
"the ternary operator makes it a bit less ugly."
    -- kaffee