Attempt to get disableBackgroundErase hack working again with 6u10+,

but despite calling method, still see flickering with 6u13


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1938 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 11 insertions, 4 deletions

diff --git a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
index a23263a8f..a510efc10 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
@@ -661,10 +661,17 @@ public class GLCanvas extends Canvas implements AWTGLAutoDrawable {
         AccessController.doPrivileged(new PrivilegedAction() {
             public Object run() {
               try {
-                disableBackgroundEraseMethod =
-                  getToolkit().getClass().getDeclaredMethod("disableBackgroundErase",
-                                                            new Class[] { Canvas.class });
-                disableBackgroundEraseMethod.setAccessible(true);
+                Class clazz = getToolkit().getClass();
+                while (clazz != null && disableBackgroundEraseMethod == null) {
+                  try {
+                    disableBackgroundEraseMethod =
+                      clazz.getDeclaredMethod("disableBackgroundErase",
+                                                                new Class[] { Canvas.class });
+                    disableBackgroundEraseMethod.setAccessible(true);
+                  } catch (Exception e) {
+                    clazz = clazz.getSuperclass();
+                  }
+                }
               } catch (Exception e) {
               }
               return null;