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

[Jeffrey M. <Jef...@Br...>]

Hopefully this problem was fixed when I implemented
the inheritance.  Prior to the most recent change
GdkEvent and GdkButtonEvent both inherited from 
BaseBoxed but GdkButtonEvent didn't inherit from
GdkEvent.  Therefore when you tried to cast from
a GdkEvent to a GdkButtonEvent the Java runtime
didn't corporate.  Please try it with last nights
changes and let me know if this is still a problem.

-Jeff

> 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
>