Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors. * * Project Info: http://www.jfree.org/jfreechart/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. * * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners.] * * ---------------- * WindowUtils.java * ---------------- * (C) Copyright 2000-2014, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): Jon Iles; * * 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); * 16-Jun-2012 : Moved from JCommon to JFreeChart (DG); * 19-Mar-2014 : Renamed WindowUtils (DG); * */ package org.jfree.chart.ui; import java.awt.Container; import java.awt.Dialog; import java.awt.Dimension; import java.awt.Rectangle; import java.awt.Window; /** * A collection of utility methods relating to user interfaces. */ public class WindowUtils { private WindowUtils() { } /** * Positions the specified frame in the middle of the screen. * * @param frame the frame to be centered on the screen. */ public static void centerFrameOnScreen(Window frame) { positionFrameOnScreen(frame, 0.5, 0.5); } /** * 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(Window frame, double horizontalPercent, double verticalPercent) { Rectangle s = frame.getGraphicsConfiguration().getBounds(); Dimension f = frame.getSize(); int w = Math.max(s.width - f.width, 0); int h = Math.max(s.height - f.height, 0); int x = (int) (horizontalPercent * w) + s.x; int y = (int) (verticalPercent * h) + s.y; frame.setBounds(x, y, f.width, f.height); } /** * 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(Window frame) { positionFrameOnScreen(frame, Math.random(), Math.random()); } /** * Positions the specified dialog within its parent. * * @param dialog the dialog to be positioned on the screen. */ public static void centerDialogInParent(Dialog dialog) { positionDialogRelativeToParent(dialog, 0.5, 0.5); } /** * Positions the specified dialog at a position relative to its parent. * * @param dialog the dialog to be positioned. * @param horizontalPercent the relative location. * @param verticalPercent the relative location. */ public static void positionDialogRelativeToParent(Dialog dialog, double horizontalPercent, double verticalPercent) { Container parent = dialog.getParent(); if (parent == null) { centerFrameOnScreen(dialog); return; } Dimension d = dialog.getSize(); Dimension p = parent.getSize(); int baseX = parent.getX(); int baseY = parent.getY(); int x = baseX + (int) (horizontalPercent * p.width); int y = baseY + (int) (verticalPercent * p.height); // make sure the dialog fits completely on the screen... Rectangle s = parent.getGraphicsConfiguration().getBounds(); Rectangle r = new Rectangle(x, y, d.width, d.height); dialog.setBounds(r.intersection(s)); } }