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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/MouseInfo.java
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+/* 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;
+
+ /**
+ * Private constructor to prevent instance creation.
+ */
+ private MouseInfo()
+ {
+ }
+
+ /**
+ * 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();
+ }
+}