| /******************************************************************************* |
| * 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 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; |
| |
| /* |
| * Composite example snippet: intercept mouse events (drag a button with the mouse) |
| * |
| * 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.*; |
| import org.eclipse.swt.layout.*; |
| |
| public class Snippet46 { |
| public static void main (String [] args) { |
| Display display = new Display (); |
| final Shell shell = new Shell (display); |
| final Composite composite = new Composite (shell, SWT.NULL); |
| composite.setEnabled (false); |
| composite.setLayout (new FillLayout ()); |
| Button button = new Button (composite, SWT.PUSH); |
| button.setText ("Button"); |
| composite.pack (); |
| composite.setLocation (10, 10); |
| final Point [] offset = new Point [1]; |
| Listener listener = new Listener () { |
| public void handleEvent (Event event) { |
| switch (event.type) { |
| case SWT.MouseDown: |
| Rectangle rect = composite.getBounds (); |
| if (rect.contains (event.x, event.y)) { |
| Point pt1 = composite.toDisplay (0, 0); |
| Point pt2 = shell.toDisplay (event.x, event.y); |
| offset [0] = new Point (pt2.x - pt1.x, pt2.y - pt1.y); |
| } |
| break; |
| case SWT.MouseMove: |
| if (offset [0] != null) { |
| Point pt = offset [0]; |
| composite.setLocation (event.x - pt.x, event.y - pt.y); |
| } |
| break; |
| case SWT.MouseUp: |
| offset [0] = null; |
| break; |
| } |
| } |
| }; |
| shell.addListener (SWT.MouseDown, listener); |
| shell.addListener (SWT.MouseUp, listener); |
| shell.addListener (SWT.MouseMove, listener); |
| shell.setSize (300, 300); |
| shell.open (); |
| while (!shell.isDisposed ()) { |
| if (!display.readAndDispatch ()) display.sleep (); |
| } |
| display.dispose (); |
| } |
| } |