*** empty log message ***

1 files changed, 65 insertions, 0 deletions

diff --git a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet275.java b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet275.java
new file mode 100644
index 0000000000..4d980a42ac
--- /dev/null
+++ b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet275.java
@@ -0,0 +1,65 @@
+/*******************************************************************************
+ * 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
+ *******************************************************************************/
+package org.eclipse.swt.snippets;
+
+/*
+ * Canvas snippet: update a Canvas frequently
+ * 
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ */
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.widgets.*;
+
+public class Snippet275 {
+
+static String value;
+public static void main (String[] args) {
+	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 (SWT.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, SWT.NONE);
+    canvas.setBounds (10, 10, 750, 750);
+    canvas.addListener (SWT.Paint, new Listener () {
+		public void handleEvent (Event event) {
+			value = String.valueOf (System.currentTimeMillis ());
+			event.gc.drawImage (image, 0, 0);
+			event.gc.drawString (value, 10, 10, true);
+		}
+	});
+    display.timerExec (INTERVAL, new Runnable () {
+		public 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 ();
+}
+
+}