Re: [Java-gnome-developer] Question concerning pixel graphics (fw d)

[Markus F. <mar...@t-...>]

> You can now implement inheritance with define-boxed types.
> This should help you with GdkPixmap, GdkBitmap, etc.

Thank you!

> > Now I'm heading for a zoom function ;-)

> Great.  We have no example code in the bindings that demonstrate
> the low-level drawing classes.  If you would like to contribute
> your example I would be happy to add it.

Okay, I'll send it to you at the time the code is in a readable form, 
commented and fully functional (short: when it's no more embarrasing 
for me);-)

As for the zoom method, I have another question:

-----------------------------
...
// the EventMask is configured properly
drwarea.signalConnect("button_press_event", "zoomStart", this);
...
public boolean zoomStart(GdkEvent event)
{
	if (event.getType().test(GdkEventType.BUTTON_PRESS)) {
		System.out.println("button_pressed_event caught");
	} else {
		System.out.println("Something happend");
	}
	return(false);
}
...
-----------------------------

prints "button_pressed_event caught". So far, so good. But if I try to 
cast 

-----------------------------
GdkEventButton e = (GdkButtonEvent) event;
-----------------------------

nothing happens (the method seems to stop at the cast).
When I try 

-----------------------------
public boolean zoomStart(GdkEventButton event)
-----------------------------

I get the warning (and, as you would expect, the method isn't called 
:-))

-----------------------------
*** WARNING ***: Java-GNOME - cannot find callback method zoomEnd in 
the specified object with signature (Lgnu/gdk/GdkEvent;)Z
-----------------------------

My fault? Lack of knowledge about gtk/gdk? Or feature? :-))

MfG Markus