From 2e5604d06b24176d92459274539ce01818019712 Mon Sep 17 00:00:00 2001
From: Petr Pchelko <pchelko@openjdk.org>
Date: Fri, 30 Aug 2013 11:11:53 +0400
Subject: [PATCH] 8023966: JViewPort.BLIT_SCROLL_MODE does not work in
 JLightweightFrame

Reviewed-by: anthony, ant
---
 jdk/src/share/classes/javax/swing/JViewport.java | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/jdk/src/share/classes/javax/swing/JViewport.java b/jdk/src/share/classes/javax/swing/JViewport.java
index c2ea60bf0ec..c271533e53e 100644
--- a/jdk/src/share/classes/javax/swing/JViewport.java
+++ b/jdk/src/share/classes/javax/swing/JViewport.java
@@ -25,6 +25,8 @@
 
 package javax.swing;
 
+import sun.swing.JLightweightFrame;
+
 import java.awt.*;
 import java.awt.event.*;
 import java.awt.peer.ComponentPeer;
@@ -361,6 +363,17 @@ public class JViewport extends JComponent implements Accessible
         super.remove(child);
     }
 
+    @Override
+    public void addNotify() {
+        super.addNotify();
+        // JLightweightFrame does not support BLIT_SCROLL_MODE, so it should be replaced
+        Window rootWindow = SwingUtilities.getWindowAncestor(this);
+        if (rootWindow instanceof JLightweightFrame
+                && getScrollMode() == BLIT_SCROLL_MODE) {
+            setScrollMode(BACKINGSTORE_SCROLL_MODE);
+        }
+    }
+
 
     /**
      * Scrolls the view so that <code>Rectangle</code>