Merged gcj-eclipse branch to trunk.

From-SVN: r120621

libjava/classpath/gnu/java/awt/ComponentReshapeEvent.java

@@ -0,0 +1,85 @@
+/* WindowResizeEvent.java -- Used to synchronize the AWT and peer sizes
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.awt;
+
+import java.awt.AWTEvent;
+import java.awt.Component;
+
+/**
+ * This is used to update the AWT's knowledge about a Window's size when
+ * the user changes the window bounds.
+ *
+ * This event is _not_ posted to the eventqueue, but rather dispatched directly
+ * via Window.dispatchEvent(). It is the cleanest way we could find to update
+ * the AWT's knowledge of the window size. Small testprograms showed the
+ * following:
+ * - Component.reshape() and its derivatives are _not_ called. This makes sense
+ *   as it could end up in loops,because this calls back into the peers.
+ * - Intercepting event dispatching for any events in
+ *   EventQueue.dispatchEvent() showed that the size is still updated. So it
+ *   is not done via an event dispatched over the eventqueue.
+ *
+ * Possible other candidates for implementation would have been:
+ * - Call a (private) callback method in Window/Component from the native
+ *   side.
+ * - Call a (private) callback method in Window/Component via reflection.
+ *
+ * Both is uglier than sending this event directly. Note however that this
+ * is impossible to test, as Component.dispatchEvent() is final and can't be
+ * intercepted from outside code. But this impossibility to test the issue from
+ * outside code also means that this shouldn't raise any compatibility issues.
+ */
+public class ComponentReshapeEvent
+  extends AWTEvent
+{
+
+  public int x;
+  public int y;
+  public int width;
+  public int height;
+
+  public ComponentReshapeEvent(Component c, int x, int y, int width, int height)
+  {
+    super(c, 1999);
+    this.x = x;
+    this.y = y;
+    this.width = width;
+    this.height = height;
+  }
+}