[pygtk] How to declare a signal handler getting passed a GdkEventButton as argument

[Timo]

Op 21-04-13 18:55, Christian Mallwitz schreef:
> Hi,
>
> I want to declare a signal handler as in
>
> __gsignals__ = {
>          'foo':        (GObject.SignalFlags.RUN_LAST, None,
> (GObject.TYPE_POINTER,)),
>      }
>
> I have a do_foo method but the parameter passed is actually a
> GdkEventButton (or rather a Gdk.EventButton in Python) - the signal is
> emitted in a 'button-press-event' signal handler.
>
> My problem is the event object I have in the 'button-press-event'
> signal handler and pass when emitting 'foo' is not a
> GObject.TYPE_POINTER. I tried GObject.TYPE_OBJECT as well to no avail.
>
> The error is: TypeError: could not convert type EventButton to
> gpointer required for parameter 0
>
> How do I declare a signal handler such that I can pass a
> GdkEventButton instance as argument to the signal handler?
I had to do the same when porting an application from GTK2 to GTK3.

GTK2 version:
     __gsignals__ = {
         'clicked' : (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, 
(gobject.TYPE_STRING, gtk.gdk.Event))
     }

GTK3 version:
     __gsignals__ = {
         'clicked' : (GObject.SIGNAL_RUN_LAST, None, (str, object))
     }

I was confused at the beginning because Gdk.Event didn't work anymore, 
but passing it as a Python object seems to do the trick.

Timo

>
> Thanks
> Christian
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