Java tutorial
entire frame is visible (provided that the frame is smaller than the screen). /* * JCommon : a free general purpose class library for the Java(tm) platform * * * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. * * Project Info: http://www.jfree.org/jcommon/index.html * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * This library 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 Lesser General Public * License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. * * [Java is a trademark or registered trademark of Sun Microsystems, Inc. * in the United States and other countries.] * * ---------------------- * RefineryUtilities.java * ---------------------- * (C) Copyright 2000-2005, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): Jon Iles; * * $Id: RefineryUtilities.java,v 1.11 2007/11/02 17:50:36 taqua Exp $ * * Changes (from 26-Oct-2001) * -------------------------- * 26-Oct-2001 : Changed package to com.jrefinery.ui.*; * 26-Nov-2001 : Changed name to SwingRefinery.java to make it obvious that this is not part of * the Java APIs (DG); * 10-Dec-2001 : Changed name (again) to JRefineryUtilities.java (DG); * 28-Feb-2002 : Moved system properties classes into com.jrefinery.ui.about (DG); * 19-Apr-2002 : Renamed JRefineryUtilities-->RefineryUtilities. Added drawRotatedString() * method (DG); * 21-May-2002 : Changed frame positioning methods to accept Window parameters, as suggested by * Laurence Vanhelsuwe (DG); * 27-May-2002 : Added getPointInRectangle method (DG); * 26-Jun-2002 : Removed unnecessary imports (DG); * 12-Jul-2002 : Added workaround for rotated text (JI); * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG); * 08-May-2003 : Added a new drawRotatedString() method (DG); * 09-May-2003 : Added a drawRotatedShape() method (DG); * 10-Jun-2003 : Updated aligned and rotated string methods (DG); * 29-Oct-2003 : Added workaround for font alignment in PDF output (DG); * 07-Nov-2003 : Added rotateShape() method (DG); * 16-Mar-2004 : Moved rotateShape() method to ShapeUtils.java (DG); * 07-Apr-2004 : Modified text bounds calculation with TextUtilities.getTextBounds() (DG); * 21-May-2004 : Fixed bug 951870 - precision in drawAlignedString() method (DG); * 30-Sep-2004 : Deprecated and moved a number of methods to the TextUtilities class (DG); * 04-Oct-2004 : Renamed ShapeUtils --> ShapeUtilities (DG); * 11-Jan-2005 : Removed deprecated code in preparation for the 1.0.0 release (DG); * */ import java.awt.Dimension; import java.awt.GraphicsEnvironment; import java.awt.Rectangle; import java.awt.Toolkit; import java.awt.Window; import java.lang.reflect.Method; /** * * * @author David Gilbert */ public class Main { /** * Positions the specified frame at a random location on the screen while ensuring that the * entire frame is visible (provided that the frame is smaller than the screen). * * @param frame the frame. */ public static void positionFrameRandomly(final Window frame) { positionFrameOnScreen(frame, Math.random(), Math.random()); } /** * Positions the specified frame at a relative position in the screen, where * 50% is considered to be the center of the screen. * * @param frame * the frame. * @param horizontalPercent * the relative horizontal position of the frame (0.0 to 1.0, where * 0.5 is the center of the screen). * @param verticalPercent * the relative vertical position of the frame (0.0 to 1.0, where 0.5 * is the center of the screen). */ public static void positionFrameOnScreen(final Window frame, final double horizontalPercent, final double verticalPercent) { final Rectangle s = getMaximumWindowBounds(); final Dimension f = frame.getSize(); final int w = Math.max(s.width - f.width, 0); final int h = Math.max(s.height - f.height, 0); final int x = (int) (horizontalPercent * w) + s.x; final int y = (int) (verticalPercent * h) + s.y; frame.setBounds(x, y, f.width, f.height); } /** * Computes the maximum bounds of the current screen device. If this method is * called on JDK 1.4, Xinerama-aware results are returned. (See Sun-Bug-ID * 4463949 for details). * * @return the maximum bounds of the current screen. */ public static Rectangle getMaximumWindowBounds() { final GraphicsEnvironment localGraphicsEnvironment = GraphicsEnvironment .getLocalGraphicsEnvironment(); try { final Method method = GraphicsEnvironment.class.getMethod("getMaximumWindowBounds", (Class[]) null); return (Rectangle) method.invoke(localGraphicsEnvironment, (Object[]) null); } catch (Exception e) { // ignore ... will fail if this is not a JDK 1.4 .. } final Dimension s = Toolkit.getDefaultToolkit().getScreenSize(); return new Rectangle(0, 0, s.width, s.height); } }