--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/snippets/canvas/Snippet275.d	Tue May 20 12:10:54 2008 +0900
@@ -0,0 +1,77 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ * D Port:
+ *     Bill Baxter <wbaxter> at gmail com
+ *******************************************************************************/
+module snippets.canvas.Snippet275;
+
+/*
+ * Canvas snippet: update a portion of a Canvas frequently
+ * 
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ */
+import dwt.DWT;
+import dwt.graphics.GC;
+import dwt.graphics.Color;
+import dwt.graphics.Point;
+import dwt.graphics.Image;
+import dwt.widgets.Display;
+import dwt.widgets.Shell;
+import dwt.widgets.Event;
+import dwt.widgets.Listener;
+import dwt.widgets.Canvas;
+
+import dwt.dwthelper.System;
+import dwt.dwthelper.utils;
+import dwt.dwthelper.Runnable;
+
+import tango.util.Convert;
+
+static String value;
+public static void main () {
+	final int INTERVAL = 888;
+	final Display display = new Display ();
+	final Image image = new Image (display, 750, 750);
+	GC gc = new GC (image);
+	gc.setBackground (display.getSystemColor (DWT.COLOR_RED));
+	gc.fillRectangle (image.getBounds ());
+	gc.dispose ();
+
+	Shell shell = new Shell (display);
+	shell.setBounds (10, 10, 790, 790);
+	final Canvas canvas = new Canvas (shell, DWT.NONE);
+	canvas.setBounds (10, 10, 750, 750);
+
+    void onPaint (Event event) {
+        value = to!(char[])(System.currentTimeMillis ());
+        event.gc.drawImage (image, 0, 0);
+        event.gc.drawString (value, 10, 10, true);
+    }
+	canvas.addListener (DWT.Paint, dgListener(&onPaint));
+
+	display.timerExec (INTERVAL, new class Runnable {
+        void run () {
+			if (canvas.isDisposed ()) return;
+			// canvas.redraw (); // <-- bad, damages more than is needed
+			GC gc = new GC (canvas);
+			Point extent = gc.stringExtent (value ~ '0');
+			gc.dispose ();
+			canvas.redraw (10, 10, extent.x, extent.y, false);
+			display.timerExec (INTERVAL, this);
+		}
+	});
+	shell.open ();
+	while (!shell.isDisposed ()){
+		if (!display.readAndDispatch ()) display.sleep ();
+	}
+	image.dispose ();
+	display.dispose ();
+}