2004-01-26 David Jee <djee@redhat.com>

* gnu/java/awt/peer/gtk/GtkComponentPeer.java
	(handleEvent): Implemented. Handles PaintEvents.
	(paint): Implemented. Use GTK native methods to queue updates
        for this heavyweight peer.
	* gnu/java/awt/peer/gtk/GtkContainerPeer.java
	(handleEvent): Removed.
	* java/awt/Component.java
	(paint): Implemented. Explictly paint the heavyweight peer.
	(update): Clear the background for heavyweight components.
	(paintAll): No need to call peer.paint() anymore.
	(processEvent): Don't process PaintEvents here. It's now done in
	the peer's handleEvent().
	(processPaintEvent): Removed.
	* java/awt/Container.java
	(paint): No need to call super.paint(). Visit heavyweight
	children as well.
	(update): Don't clear the background here.  It's done in
	Component.update().
	(visitChildren): Added check to not recurse into Containers.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkComponentPeer.c
	(filter_expose_event_handler): New method.  Filter unwanted
	expose events while painting heavyweight peers.
	(Java_gnu_java_awt_peer_gtk_GtkComponentPeer_addExposeFilter):
	New method. Connect filter and block pre_event_handler.
	(Java_gnu_java_awt_peer_gtk_GtkComponentPeer_removeExposeFilter):
	New method. Disconnect filter and unblock pre_event_handler.
	(Java_gnu_java_awt_peer_gtk_GtkComponentPeer_gtkWidgetQueueDrawArea):
	New method. Invalidate and update given area.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkEvents.c
	(pre_event_handler): Add checks for unwanted expose events.

From-SVN: r76668

libjava/java/awt/Component.java

@@ -1702,6 +1702,9 @@ public abstract class Component
    */
   public void paint(Graphics g)
   {
+    // Paint the heavyweight peer
+    if (!isLightweight() && peer != null)
+      peer.paint(g);
   }
 
   /**
@@ -1719,6 +1722,15 @@ public abstract class Component
    */
   public void update(Graphics g)
   {
+    if (!isLightweight())
+      {
+        Rectangle clip = g.getClipBounds();
+        if (clip == null)
+          g.clearRect(0, 0, width, height);
+        else
+          g.clearRect(clip.x, clip.y, clip.width, clip.height);
+      }
+
     paint(g);
   }
 
@@ -1732,8 +1744,6 @@ public abstract class Component
   {
     if (! visible)
       return;
-    if (peer != null)
-      peer.paint(g);
     paint(g);
   }
 
@@ -2787,8 +2797,6 @@ public abstract class Component
 
     if (e instanceof FocusEvent)
       processFocusEvent((FocusEvent) e);
-    else if (e instanceof PaintEvent)
-      processPaintEvent((PaintEvent) e);
     else if (e instanceof MouseWheelEvent)
       processMouseWheelEvent((MouseWheelEvent) e);
     else if (e instanceof MouseEvent)
@@ -4224,42 +4232,6 @@ p   * <li>the set of backward traversal keys
     return newEvent;
   }
 
-  /**
-   * Does the work for a paint event.
-   *
-   * @param event the event to process
-   */
-  private void processPaintEvent(PaintEvent event)
-  {
-    // Can't do graphics without peer
-    if (peer == null)
-      return;
-
-    Graphics gfx = getGraphics();
-    try
-      {
-	Shape clip = event.getUpdateRect();
-	gfx.setClip(clip);
-
-	switch (event.id)
-	  {
-	  case PaintEvent.PAINT:
-	    paint(gfx);
-	    break;
-	  case PaintEvent.UPDATE:
-	    update(gfx);
-	    break;
-	  default:
-	    throw new IllegalArgumentException("unknown paint event");
-	  }
-	event.consume ();
-      }
-    finally
-      {
-	gfx.dispose();
-      }
-  }
-
   /**
    * This method is used to implement transferFocus(). CHILD is the child
    * making the request. This is overridden by Container; when called for an

libjava/java/awt/Container.java

@@ -663,8 +663,9 @@ public class Container extends Component
   {
     if (!isShowing())
       return;
-    super.paint(g);
-    visitChildren(g, GfxPaintVisitor.INSTANCE, true);
+    // Visit heavyweights as well, in case they were
+    // erased when we cleared the background for this container.
+    visitChildren(g, GfxPaintVisitor.INSTANCE, false);
   }
 
   /**
@@ -678,11 +679,6 @@ public class Container extends Component
    */
   public void update(Graphics g)
   {
-    Rectangle clip = g.getClipBounds();
-    if (clip == null)
-      g.clearRect(0, 0, width, height);
-    else
-      g.clearRect(clip.x, clip.y, clip.width, clip.height);
     super.update(g);
   }
 
@@ -1204,8 +1200,12 @@ public class Container extends Component
         for (int i = ncomponents - 1; i >= 0; --i)
           {
             Component comp = component[i];
+            // If we're visiting heavyweights as well,
+            // don't recurse into Containers here. This avoids
+            // painting the same nested child multiple times.
             boolean applicable = comp.isVisible()
-              && (comp.isLightweight() || !lightweightOnly);
+              && (comp.isLightweight()
+                  || !lightweightOnly && ! (comp instanceof Container));
 
             if (applicable)
               visitChild(gfx, visitor, comp);