mirror of git://gcc.gnu.org/git/gcc.git
103 lines
3.4 KiB
Java
103 lines
3.4 KiB
Java
/* MouseInfo.java -- utility methods for mice.
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Copyright (C) 2006 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt;
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import gnu.java.awt.ClasspathToolkit;
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import java.awt.peer.MouseInfoPeer;
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/**
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* MouseInfo is a class containing utility functions for mouse information.
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*
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* @author Sven de Marothy
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* @since 1.5
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*/
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public class MouseInfo
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{
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private static MouseInfoPeer peer;
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/**
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* Private constructor to prevent instance creation.
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*/
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private MouseInfo()
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{
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}
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/**
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* Returns a PointerInfo object containing information about the current
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* location of the mouse pointer
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*
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* @throws HeadlessException if the current GraphicsEnvironment is headless.
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* @return a PointerInfo object.
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*/
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public static PointerInfo getPointerInfo() throws HeadlessException
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{
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SecurityManager sm = System.getSecurityManager();
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if (sm != null)
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sm.checkPermission( new AWTPermission("watchMousePointer") );
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if( GraphicsEnvironment.isHeadless() )
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throw new HeadlessException();
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if( peer == null )
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peer = Toolkit.getDefaultToolkit().getMouseInfoPeer();
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Point p = new Point();
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int screen = peer.fillPointWithCoords( p );
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GraphicsDevice[] gds = GraphicsEnvironment.getLocalGraphicsEnvironment().
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getScreenDevices();
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return new PointerInfo( gds[ screen ], p );
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}
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/**
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* Returns the number of mouse buttons, or -1 if no mouse is connected.
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* (mentioned in the 1.5 release notes)
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*
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* @throws HeadlessException if the current GraphicsEnvironment is headless.
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* @return an integer number of buttons.
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*/
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public static int getNumberOfButtons() throws HeadlessException
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{
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if( GraphicsEnvironment.isHeadless() )
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throw new HeadlessException();
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return ((ClasspathToolkit)Toolkit.getDefaultToolkit()).
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getMouseNumberOfButtons();
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}
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}
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