Name: bsC130419 Date: 07/27/2001


java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)

On Linux (SuSe 7.1 with KDE and java-version 1.4.0_beta)
the following source-code causes:
Exception in thread "main" java.lang.InternalError: Drawable is NULL

On Windows NT (SP5) with the same java-version it does not.

The problem is reproducible with the option -Xint (java -Xint TestFramedPanel).
And it is still reproducible with the option -Xfuture (java -Xfuture
TestFramedPanel).

On the same Linux with java-version 1.3.1 the source works fine!

On Windows NT (SP5) with different java-versions (1.1.8, 1.2.1, 1.3.1,
1.4.0_beta) the source works fine:

--- begin source ---

import java.awt.*;
import uk.co.ist.mwt.*;

class TestFramedPanel extends Frame
{
  Label testLabel = new Label("Test");
  FramedPanel testFrame = new FramedPanel();
    
  public TestFramedPanel()
  {
testFrame = new FramedPanel();
testFrame.add( testLabel );

this.add( testFrame );
  }

  public static void main( String args[] )
  {
TestFramedPanel myTestFramedPanel = new TestFramedPanel();
myTestFramedPanel.pack();
myTestFramedPanel.show();
  }

}

--- end source ---

On Linux the source-code causes this message:
Exception in thread "main" java.lang.InternalError: Drawable is NULL
   at sun.awt.X11Renderer.doFillPoly(Native Method)
   at sun.awt.X11Renderer.fillPolygon(X11Renderer.java:192)
   at sun.java2d.pipe.ValidatePipe.fillPolygon(ValidatePipe.java:105)
   at sun.java2d.SunGraphics2D.fillPolygon(SunGraphics2D.java:1985)
   at uk.co.ist.mwt.ShadowDrawer.drawShadow(ShadowDrawer.java:147)
   at uk.co.ist.mwt.ShadowDrawer.draw3DRect(ShadowDrawer.java:169)
   at uk.co.ist.mwt.ShadowDrawer.draw3DRect(ShadowDrawer.java:161)
   at
uk.co.ist.mwt.FrameLayoutManager.drawFrameShadow(FrameLayoutManager.java:249)
   at
uk.co.ist.mwt.FrameLayoutManager.layoutContainer(FrameLayoutManager.java:311)
   at java.awt.Container.layout(Container.java:798)
   at java.awt.Container.doLayout(Container.java:788)
   at java.awt.Container.validateTree(Container.java:865)
   at java.awt.Container.validateTree(Container.java:872)
   at java.awt.Container.validate(Container.java:840)
   at java.awt.Window.pack(Window.java:412)
   at TestFramedPanel.main(TestFramedPanel.java:20)


The package uk.co.ist.mwt.* is shipped with XDesigner,
which is similar to Sun WorkShop Visual. In this package which is
also called the MWT Library there is the class FramedPanel().
The identical package is shipped with Sun WorkShop Visual.

For further information about Workshop Visual and Java see:
http://docs.sun.com/htmlcoll/coll.82.5/iso-8859-1/SWVISUG/JavaDesigning_1.html

For further information about Frame see:
http://docs.sun.com/htmlcoll/coll.82.5/iso-8859-1/SWVISUG/WidgetReference_1.html
and search for "Frame".


I can not describe the problem more exact, because I don't have the
source files of the MWT library and the class ShadowDrawer is
not public. I do not think that it is an error
in the class FramedPanel().But I think this is a problem of
the new java-version (1.4.0) on Linux and has something to do with
native code, because with version 1.3.1 on the same(!) Linux
the method sun.awt.X11Renderer.doFillPoly(Native Method) works fine.
(Review ID: 128879)
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