NewtCanvasAWT: disableBackgroundErase() before (X11) and after (Windows) addNotify().

This change is in sync with 86c164950b0a0d351fc8af3884187b10201b6237

1 files changed, 17 insertions, 0 deletions

diff --git a/src/newt/classes/com/jogamp/newt/awt/NewtCanvasAWT.java b/src/newt/classes/com/jogamp/newt/awt/NewtCanvasAWT.java
index a0ab5f9f6..bee81624a 100644
--- a/src/newt/classes/com/jogamp/newt/awt/NewtCanvasAWT.java
+++ b/src/newt/classes/com/jogamp/newt/awt/NewtCanvasAWT.java
@@ -140,8 +140,16 @@ public class NewtCanvasAWT extends java.awt.Canvas {
     }
 
     public void addNotify() {
+
+        // before native peer is valid: X11
+        disableBackgroundErase();
+
+        // creates the native peer
         super.addNotify();
+
+        // after native peer is valid: Windows
         disableBackgroundErase();
+
         java.awt.Container cont = getContainer(this);
         if(DEBUG) {
             // if ( isShowing() == false ) -> Container was not visible yet.
@@ -304,13 +312,22 @@ public class NewtCanvasAWT extends java.awt.Canvas {
       } catch (Exception e) {
       }
       disableBackgroundEraseInitialized = true;
+      if(DEBUG) {
+        System.err.println("NewtCanvasAWT: TK disableBackgroundErase method found: "+
+                (null!=disableBackgroundEraseMethod));
+      }
     }
     if (disableBackgroundEraseMethod != null) {
+      Throwable t=null;
       try {
         disableBackgroundEraseMethod.invoke(getToolkit(), new Object[] { this });
       } catch (Exception e) {
         // FIXME: workaround for 6504460 (incorrect backport of 6333613 in 5.0u10)
         // throw new GLException(e);
+        t = e;
+      }
+      if(DEBUG) {
+        System.err.println("NewtCanvasAWT: TK disableBackgroundErase error: "+t);
       }
     }
   }