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/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);