Positions the specified frame at a relative position in the screen, where 50% is considered to be the center of the screen. : SwingUtilities « Swing « Java Tutorial






/* 
 * 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 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);
  }
}








14.127.SwingUtilities
14.127.1.Getting the JFrame of a Component
14.127.2.Convert a coordinate relative to a component's bounds to screen coordinates
14.127.3.Convert a coordinate on a screen to a coordinate relative to a component's bounds
14.127.4.Handle long-running tasks in a Swing application
14.127.5.Get the JFrame by getting the root of a component
14.127.6.Positions the specified frame at a relative position in the screen, where 50% is considered to be the center of the screen.
14.127.7.Positions the specified frame in the middle of the screen.
14.127.8.Positions the specified frame at a random location on the screen while ensuring that the
14.127.9.Get Window from a component
14.127.10.Center that window on the given desktop.
14.127.11.Get All Components in a container
14.127.12.Get Point For Centering
14.127.13.Is Within Parent
14.127.14.Show the given frame as modal to the specified owner
14.127.15.Change the sizes of all the passed buttons to be the size of the largest one.
14.127.16.Get Screen Bounds For
14.127.17.Returns the offset of the bracket matching the one at the specified offset of the document