| /* MouseInfo.java -- utility methods for mice. |
| Copyright (C) 2006 Free Software Foundation |
| |
| 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 java.awt; |
| |
| import gnu.java.awt.ClasspathToolkit; |
| import java.awt.peer.MouseInfoPeer; |
| |
| /** |
| * MouseInfo is a class containing utility functions for mouse information. |
| * |
| * @author Sven de Marothy |
| * @since 1.5 |
| */ |
| public class MouseInfo |
| { |
| private static MouseInfoPeer peer; |
| |
| /** |
| * Returns a PointerInfo object containing information about the current |
| * location of the mouse pointer |
| * |
| * @throws HeadlessException if the current GraphicsEnvironment is headless. |
| * @return a PointerInfo object. |
| */ |
| public static PointerInfo getPointerInfo() throws HeadlessException |
| { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) |
| sm.checkPermission( new AWTPermission("watchMousePointer") ); |
| |
| if( GraphicsEnvironment.isHeadless() ) |
| throw new HeadlessException(); |
| |
| if( peer == null ) |
| peer = Toolkit.getDefaultToolkit().getMouseInfoPeer(); |
| |
| Point p = new Point(); |
| int screen = peer.fillPointWithCoords( p ); |
| |
| GraphicsDevice[] gds = GraphicsEnvironment.getLocalGraphicsEnvironment(). |
| getScreenDevices(); |
| |
| return new PointerInfo( gds[ screen ], p ); |
| } |
| |
| /** |
| * Returns the number of mouse buttons, or -1 if no mouse is connected. |
| * (mentioned in the 1.5 release notes) |
| * |
| * @throws HeadlessException if the current GraphicsEnvironment is headless. |
| * @return an integer number of buttons. |
| */ |
| public static int getNumberOfButtons() throws HeadlessException |
| { |
| if( GraphicsEnvironment.isHeadless() ) |
| throw new HeadlessException(); |
| return ((ClasspathToolkit)Toolkit.getDefaultToolkit()). |
| getMouseNumberOfButtons(); |
| } |
| } |