swt snippets

1 files changed, 77 insertions, 0 deletions

diff --git a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet9.java b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet9.java
new file mode 100644
index 0000000000..4dae67c730
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+++ b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet9.java
@@ -0,0 +1,77 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.swt.snippets;
+
+/*
+ * Composite example snippet: scroll a child control automatically
+ *
+ * For a list of all SWT example snippets see
+ * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
+ */
+import org.eclipse.swt.*;
+import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.widgets.*;
+
+public class Snippet9 {
+	
+public static void main (String [] args) {
+	Display display = new Display ();
+	final Shell shell = new Shell (display, SWT.SHELL_TRIM | SWT.H_SCROLL | SWT.V_SCROLL);
+	final Composite composite = new Composite (shell, SWT.BORDER);
+	composite.setSize (200, 400);
+	final ScrollBar hBar = shell.getHorizontalBar ();
+	hBar.addListener (SWT.Selection, new Listener () {
+		public void handleEvent (Event e) {
+			Point location = composite.getLocation ();
+			location.x = -hBar.getSelection ();
+			composite.setLocation (location);
+		}
+	});
+	final ScrollBar vBar = shell.getVerticalBar ();
+	vBar.addListener (SWT.Selection, new Listener () {
+		public void handleEvent (Event e) {
+			Point location = composite.getLocation ();
+			location.y = -vBar.getSelection ();
+			composite.setLocation (location);
+		}
+	});
+	shell.addListener (SWT.Resize,  new Listener () {
+		public void handleEvent (Event e) {
+			Point size = composite.getSize ();
+			Rectangle rect = shell.getClientArea ();
+			hBar.setMaximum (size.x);
+			vBar.setMaximum (size.y);
+			hBar.setThumb (Math.min (size.x, rect.width));
+			vBar.setThumb (Math.min (size.y, rect.height));
+			int hPage = size.x - rect.width;
+			int vPage = size.y - rect.height;
+			int hSelection = hBar.getSelection ();
+			int vSelection = vBar.getSelection ();
+			Point location = composite.getLocation ();
+			if (hSelection >= hPage) {
+				if (hPage <= 0) hSelection = 0;
+				location.x = -hSelection;
+			}
+			if (vSelection >= vPage) {
+				if (vPage <= 0) vSelection = 0;
+				location.y = -vSelection;
+			}
+			composite.setLocation (location);
+		}
+	});
+	shell.open ();
+	while (!shell.isDisposed()) {
+		if (!display.readAndDispatch ()) display.sleep ();
+	}
+	display.dispose ();
+}
+
+}