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

[Jeff M. <ku...@gm...>]

What version of java-gnome are you using?  Are you using
cvs HEAD?


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>
> 
> -------------------------------------------------------
> SF email is sponsored by - The IT Product Guide
> Read honest & candid reviews on hundreds of IT Products from real users.
> Discover which products truly live up to the hype. Start reading now.
> http://productguide.itmanagersjournal.com/
> _______________________________________________
> java-gnome-developer mailing list
> jav...@li...
> https://lists.sourceforge.net/lists/listinfo/java-gnome-developer
> 


-- 
Jeffrey Morgan

"The highest reward for a man's toil is not
what he gets for it, but what he becomes by it"
    - Jon Ruskin