src/share/classes/javax/swing/DefaultDesktopManager.java

rev 1556 : 6794764: Translucent windows are completely repainted on every paint event, on Windows
6719382: Printing of AWT components on windows is not working
6726866: Repainting artifacts when resizing or dragging JInternalFrames in non-opaque toplevel
6683775: Painting artifacts is seen when panel is made setOpaque(false) for a translucent window
Reviewed-by: anthony, tdv, alexp

*** 32,41 ****
--- 32,44 ----
  import javax.swing.border.Border;
  import java.awt.event.ComponentListener;
  import java.awt.event.ComponentAdapter;
  import java.awt.event.ComponentEvent;
  
+ import sun.awt.AWTAccessor;
+ import sun.awt.SunToolkit;
+ 
  /** This is an implementation of the <code>DesktopManager</code>.
    * It currently implements the basic behaviors for managing
    * <code>JInternalFrame</code>s in an arbitrary parent.
    * <code>JInternalFrame</code>s that are not children of a
    * <code>JDesktop</code> will use this component
*** 632,648 ****
            ((JInternalFrame)f).danger = false;
        }
  
        boolean floaterCollision = isFloaterCollision(previousBounds, currentBounds);
  
-     // System.out.println(previousBounds);
        JComponent parent = (JComponent)f.getParent();
        Rectangle visBounds = previousBounds.intersection(desktopBounds);
-     //  System.out.println(previousBounds);
- 
- 
-      // System.out.println(visBounds);
  
        RepaintManager currentManager = RepaintManager.currentManager(f);
  
        currentManager.beginPaint();
        try {
--- 635,646 ----
*** 680,690 ****
                dirtyRects = SwingUtilities.computeDifference(previousBounds,
                                                              currentBounds);
            } else {
                dirtyRects = new Rectangle[1];
                dirtyRects[0] = previousBounds;
-               //  System.out.println("no intersection");
            };
  
            // Fix the damage
            for (int i = 0; i < dirtyRects.length; i++) {
                parent.paintImmediately(dirtyRects[i]);
--- 678,687 ----
*** 699,716 ****
                    dirtyRects[i].y += newY - previousBounds.y;
                    ((JInternalFrame)f).isDragging = false;
  
                    parent.paintImmediately(dirtyRects[i]);
                    ((JInternalFrame)f).isDragging = true;
- 
-                   // System.out.println(dirtyRects[i]);
                }
  
            }
        } finally {
            currentManager.endPaint();
        }
     }
  
     private boolean isFloaterCollision(Rectangle moveFrom, Rectangle moveTo) {
        if (floatingItems.length == 0) {
          // System.out.println("no floaters");
--- 696,721 ----
                    dirtyRects[i].y += newY - previousBounds.y;
                    ((JInternalFrame)f).isDragging = false;
  
                    parent.paintImmediately(dirtyRects[i]);
                    ((JInternalFrame)f).isDragging = true;
                }
  
            }
        } finally {
            currentManager.endPaint();
        }
+ 
+       // update window if it's non-opaque
+       Window topLevel = SwingUtilities.getWindowAncestor(f);
+       Toolkit tk = Toolkit.getDefaultToolkit();
+       if (!AWTAccessor.getWindowAccessor().isOpaque(topLevel) &&
+           (tk instanceof SunToolkit) &&
+           ((SunToolkit)tk).needUpdateWindow())
+       {
+           AWTAccessor.getWindowAccessor().updateWindow(topLevel);
+       }
     }
  
     private boolean isFloaterCollision(Rectangle moveFrom, Rectangle moveTo) {
        if (floatingItems.length == 0) {
          // System.out.println("no floaters");