1 files changed, 156 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/qt/QtRepaintThread.java b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/qt/QtRepaintThread.java
new file mode 100644
index 000000000..405505e9b
--- /dev/null
+++ b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/qt/QtRepaintThread.java
@@ -0,0 +1,156 @@
+/* QtRepaintThread.java -- Repaint thread implementation
+   Copyright (C)  2005  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.peer.qt;
+
+/**
+ * This class does repainting of Component back-buffers. It is undesirable to
+ * do this directly from the paint callback in QtComponentPeer, because that
+ * is executed from the main thread. Thus, if a call is made at the same time
+ * which requires execution by the main thread, and this is sharing a lock with
+ * paint(), then a deadlock will occur, which must be avoided. In general, 
+ * the main Qt thread should avoid calling into java code as far as possible.
+ *
+ */
+public class QtRepaintThread extends Thread 
+{
+  static class RepaintComponent 
+  {
+    public QtComponentPeer curr;
+    public RepaintComponent next;
+    public boolean paintAll;
+    public int x, y, w, h;
+
+    public RepaintComponent(QtComponentPeer p)
+    {
+      curr = p;
+      next = null;
+      paintAll = true;
+    }
+
+    public RepaintComponent(QtComponentPeer p, int x, int y, int w, int h)
+    {
+      this(p);
+      paintAll = false;
+      this.x = x;
+      this.y = y;
+      this.w = w;
+      this.h = h;
+    }
+  }
+  
+  RepaintComponent component;
+  boolean busy;
+
+  public QtRepaintThread()
+  {
+    component = null;
+  }
+
+  public void run()
+  {
+    while( true )
+      {
+	try
+	  {
+	    busy = false;
+	    // Wait for a repaint
+	    sleep(100);
+	    busy = true;
+	  }
+	catch (InterruptedException ie)
+	  {
+	    while( component != null )
+	      {
+		try
+		  {
+		    if( component.paintAll )
+		      {
+			// update the back-buffer.
+			component.curr.paintBackBuffer(); 
+			component.curr.QtUpdate(); // trigger a native repaint event
+		      }
+		    else
+		      {
+			component.curr.paintBackBuffer(component.x, component.y,
+						       component.w, component.h);
+			component.curr.QtUpdateArea(component.x, component.y,
+						    component.w, component.h); 
+		      }
+		  }
+		catch (InterruptedException e)
+		  {
+		  }
+		component = component.next;
+	      }
+	  }
+      }
+  }
+
+  /**
+   * Enqueue a component for repainting.
+   */
+  public synchronized void queueComponent(QtComponentPeer p)
+  {
+    if( component == null )
+      component = new RepaintComponent(p);
+    else
+      {
+	RepaintComponent r = component;
+	while( r.next != null ) r = r.next;
+	r.next = new RepaintComponent(p);
+      }
+    interrupt();
+  }
+
+  /**
+   * Enqueue a component for repainting.
+   */
+  public synchronized void queueComponent(QtComponentPeer p, int x, int y, 
+					  int w, int h)
+  {
+    if( component == null )
+      component = new RepaintComponent(p, x, y, w, h);
+    else
+      {
+	RepaintComponent r = component;
+	while( r.next != null ) r = r.next;
+	r.next = new RepaintComponent(p, x, y, w, h);
+      }
+    interrupt();
+  }
+}