LayoutExtraGaps.java revision 1343:60290477fe73
1/* 2 * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 */ 23 24/* 25 @test 26 @bug 4370316 27 @summary GridLayout does not centre its component properly 28 (summary was GridLayout does not fill its Container) 29 @library ../../regtesthelpers 30 @build Util 31 @author Andrei Dmitriev : area=awt.layout 32 @run main LayoutExtraGaps 33*/ 34 35import java.awt.*; 36import java.awt.event.*; 37import test.java.awt.regtesthelpers.Util; 38 39public class LayoutExtraGaps extends Frame { 40 final static int compCount = 30; 41 42 public LayoutExtraGaps() { 43 super("GridLayoutTest"); 44 Panel yellowPanel = new Panel(new GridLayout(compCount, 1, 3, 3)); 45 yellowPanel.setBackground(Color.yellow); 46 47 for(int i = 0; i < compCount ; i++) { 48 Label redLabel = new Label(""+i); 49 redLabel.setBackground(Color.red); 50 yellowPanel.add(redLabel); 51 } 52 53 Panel bluePanel = new Panel(new GridLayout(1, compCount, 3, 3)); 54 bluePanel.setBackground(Color.blue); 55 56 for(int i = 0; i < compCount; i++) { 57 Label greenLabel = new Label(""+i); 58 greenLabel.setBackground(Color.green); 59 bluePanel.add(greenLabel); 60 } 61 62 //RTL orientation 63 Panel blackPanel = new Panel(new GridLayout(compCount, 1, 3, 3)); 64 blackPanel.setBackground(Color.black); 65 blackPanel.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT); 66 67 for(int i = 0; i < compCount ; i++) { 68 Label redLabel = new Label(""+i); 69 redLabel.setBackground(Color.red); 70 blackPanel.add(redLabel); 71 } 72 73 Panel redPanel = new Panel(new GridLayout(1, compCount, 3, 3)); 74 redPanel.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT); 75 redPanel.setBackground(Color.red); 76 77 for(int i = 0; i < compCount; i++) { 78 Label greenLabel = new Label(""+i); 79 greenLabel.setBackground(Color.green); 80 redPanel.add(greenLabel); 81 } 82 83 setLayout(new GridLayout(2, 2, 20, 20)); 84 85 add(yellowPanel); 86 add(bluePanel); 87 add(redPanel); 88 add(blackPanel); 89 pack(); 90 setSize((int)getPreferredSize().getWidth() + 50, (int)getPreferredSize().getHeight() + 50); 91 setVisible(true); 92 93 Util.waitForIdle(Util.createRobot()); 94 95 if (isComponentCentredLTR(yellowPanel) && isComponentCentredLTR(bluePanel) 96 && isComponentCentredLTR(blackPanel) && isComponentCentredRTL(redPanel)) 97 { 98 System.out.println("Test passed."); 99 } else { 100 throw new RuntimeException("Test failed. GridLayout doesn't center component."); 101 } 102 } 103 104 /** 105 * Checks if the components under Panel p are properly centred (i.e. 106 * opposite borders between the Panel and component are equal). Panel p 107 * must not be affect by RTL orientation (RTL only affects horizontal 108 * positioning and components lay out from top right corner). 109 * 110 * @param p the panel where the components exist and is not affected 111 * by right to left orientation 112 * @return true if components of panel p are properly centre, false 113 * otherwise 114 */ 115 public static boolean isComponentCentredLTR(Panel p) { 116 double borderLeft; 117 double borderRight; 118 double borderTop; 119 double borderBottom; 120 121 //The first component(rectangle) in panel p. 122 Rectangle firstRec = p.getComponent(0).getBounds(); 123 124 //The last component(rectangle) in panel p. 125 Rectangle lastRec = p.getComponent(compCount - 1).getBounds(); 126 127 System.out.println("bounds of the first rectangle in "+ p.getName() + " = " + firstRec); 128 System.out.println("bounds of the last rectangle in "+ p.getName() + " = " + lastRec); 129 130 borderLeft = firstRec.getX(); 131 borderRight = p.getWidth() - lastRec.getWidth() - lastRec.getX(); 132 borderTop = firstRec.getY(); 133 borderBottom = p.getHeight() - lastRec.getHeight() - lastRec.getY(); 134 135 return areBordersEqual(borderLeft, borderRight) && 136 areBordersEqual(borderTop, borderBottom); 137 } 138 139 /** 140 * Checks if the components under Panel p are properly centred (i.e. 141 * opposite borders between the Panel and component are equal). Panel p 142 * must be affect by RTL orientation (RTL only affects horizontal positioning 143 * and components lay out from top right corner). 144 * 145 * @param p the panel where the components exist and is affected by 146 * right to left orientation 147 * @return true if components of panel p are properly centre, false 148 * otherwise 149 */ 150 public static boolean isComponentCentredRTL(Panel p) { 151 double borderLeft; 152 double borderRight; 153 double borderTop; 154 double borderBottom; 155 156 //The first component(rectangle) in panel p. 157 Rectangle firstRec = p.getComponent(0).getBounds(); 158 159 //The last component(rectangle) in panel p. 160 Rectangle lastRec = p.getComponent(compCount - 1).getBounds(); 161 162 System.out.println("bounds of the first rectangle in "+ p.getName() + " = " + firstRec); 163 System.out.println("bounds of the last rectangle in "+ p.getName() + " = " + lastRec); 164 165 borderLeft = lastRec.getX(); 166 borderRight = p.getWidth() - firstRec.getWidth() - firstRec.getX(); 167 borderTop = lastRec.getY(); 168 borderBottom = p.getHeight() - firstRec.getHeight() - firstRec.getY(); 169 170 return areBordersEqual(borderLeft, borderRight) && 171 areBordersEqual(borderTop, borderBottom); 172 } 173 174 /** 175 * Given two borders border1 and border2 check if they are equal. 176 * 177 * @param border1 one of the borders being compared 178 * @param border2 the other border being compared 179 * @return true if border1 and border2 are equal to each other (i.e. 180 * their width/height difference is at most 1, assuming the 181 * smallest pixel is of size 1), false otherwise 182 */ 183 public static boolean areBordersEqual(double border1, double border2) { 184 return Math.abs(border1 - border2) <= 1; 185 } 186 187 public static void main(String[] args) { 188 new LayoutExtraGaps(); 189 } 190} 191