1 files changed, 69 insertions, 4 deletions

diff --git a/libjava/gnu/awt/xlib/XEventQueue.java b/libjava/gnu/awt/xlib/XEventQueue.java
index ea2ad186060..b068daf1b52 100644
--- a/libjava/gnu/awt/xlib/XEventQueue.java
+++ b/libjava/gnu/awt/xlib/XEventQueue.java
@@ -8,12 +8,16 @@ details.  */
 
 package gnu.awt.xlib;
 
-import java.awt.*;
-
 import gnu.gcj.xlib.Display;
+import java.awt.AWTEvent;
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.EventQueue;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ContainerEvent;
 
 /**
- * The only difference here from a standard EventQueue is that the X
+ * The main difference here from a standard EventQueue is that the X
  * display connection is flushed before waiting for more events.
  */
 public class XEventQueue extends EventQueue
@@ -29,6 +33,67 @@ public class XEventQueue extends EventQueue
   {
     if ((peekEvent() == null) && (display != null))
       display.flush();
-    return super.getNextEvent();
+    AWTEvent event = super.getNextEvent();
+    if (event != null)
+    {
+      switch (event.getID ())
+      {
+        case ContainerEvent.COMPONENT_ADDED:
+        {
+          /* If a component has been added to a container, it needs to be
+           * invalidated, to ensure that it ultimately gets an addNotify.
+           * If it's not invalidated, the component will never display in 
+           * an already-showing container (probably applies only to CardLayout).
+           * Perhaps this code should be in java.awt, but the problem only seems 
+           * to happen with xlib peers (not with gtk peers) so it's here instead.
+           */
+          ContainerEvent ce = (ContainerEvent)event;
+          ce.getChild ().invalidate ();
+          ce.getContainer ().validate ();
+        }
+        break;
+
+        case ComponentEvent.COMPONENT_RESIZED:
+        {
+          ComponentEvent ce = (ComponentEvent)event;
+          // FIXME: there may be opportunities to coalesce resize events
+          ce.getComponent ().validate ();
+        }
+        break;
+
+        case ComponentEvent.COMPONENT_SHOWN:
+        {
+          ComponentEvent ce = (ComponentEvent)event;
+          Component comp = ce.getComponent ();
+          if (!comp.isValid ())
+          {
+            /* Try to validate, going up the tree to the highest-level invalid
+             * Container.  The idea is to ensure that addNotify gets called for
+             * any non-top-level component being shown, to make it create a peer.
+             */
+            Container parent = comp.getParent ();
+            while (parent != null)
+            {
+              Container next = parent.getParent ();
+              if (next == null || next.isValid ())
+              {
+                parent.validate ();
+                break;
+              }
+              else
+                parent = next;
+            }
+            if (comp instanceof Container)
+              comp.validate ();
+          }
+          comp.repaint ();
+        }
+        break;
+        
+        default:
+          break;
+      }
+    }
+    return event;
   }
 }