Re: [Java-gnome-developer] Assertion failure while drawing on DrawingArea

[Jaime <re...@sa...>]

On Sun, 2004-12-12 at 09:53 -0500, Jeff Morgan wrote:
> What version of java-gnome are you using?  Are you using
> cvs HEAD?
> 
> 

Sorry Jeff, I should have mentioned in my original email that I'm using
the latest stable releases available from ftp.gnome.org i.e. 
libgtk-java: 2.4.6
libgnome-java: 2.8.2
libglade-java: 2.8.2
libgconf-java: 2.8.2

Do you know whether this is something that's been "fixed" in cvs (if so,
I'll download cvs and try to compile it)

Thanks, Jaime

> On Sun, 12 Dec 2004 14:08:57 +0000, Jaime <re...@sa...> wrote:
> > Hi folks.
> > 
> > I've tried to write a simple little program to draw on a DrawingArea,
> > but without success. I get the following assertion failure at runtime:
> > 
> > (java-gnome:2393): Gdk-CRITICAL **: file gdkdraw.c: line 338
> > (gdk_draw_point): assertion `GDK_IS_DRAWABLE (drawable)' failed
> > 
> > Could anyone please tell me where I'm going wrong? In fact, a pointer to
> > any example code which successfully draws onto a DrawingArea would be
> > just as good! Thank you,
> > 
> > Jaime :-)
> > 
> > <snip>
> > package drawingAreaTest;
> > 
> > import org.gnu.gtk.DrawingArea;
> > import org.gnu.gtk.Gtk;
> > import org.gnu.gtk.Window;
> > import org.gnu.gtk.WindowType;
> > import org.gnu.gtk.event.ExposeEvent;
> > import org.gnu.gtk.event.ExposeListener;
> > import org.gnu.gtk.event.LifeCycleEvent;
> > import org.gnu.gtk.event.LifeCycleListener;
> > 
> > public class Test {
> > 
> >   DrawingArea area = null;
> > 
> >   Window window;
> > 
> >   Test() {
> >     window = new Window(WindowType.TOPLEVEL);
> >     window.setTitle("Drawing Area Example");
> >     window.addListener(new LifeCycleListener() {
> >       public void lifeCycleEvent(LifeCycleEvent event) {
> >       }
> >       public boolean lifeCycleQuery(LifeCycleEvent event) {
> >         if (event.isOfType(LifeCycleEvent.Type.DESTROY)
> >           || event.isOfType(LifeCycleEvent.Type.DELETE)) {
> >           Gtk.mainQuit();
> >         }
> >         return true;
> >       }
> >     });
> >     area=new DrawingArea();
> >     window.add(area);
> >     area.addListener(new ExposeListener() {
> >       public boolean exposeEvent(ExposeEvent event) {
> >         System.out.println("Expose event: "+window.getWindow());
> >         window.getWindow().drawPoint(20, 20);
> >         return false;
> >       }
> >     });
> >     window.showAll();
> >     System.out.println("Should be printed before expose event");
> >   }
> > 
> >   public static void main(String[] args) {
> >     Gtk.init(args);
> >     new Test();
> >     Gtk.main();
> >   }
> > 
> > }
> > </snip>
> > 
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> 
>