1 /*
2 * Copyright (c) 2006, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * 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
35 import java.awt.*;
36 import java.awt.event.*;
37 import test.java.awt.regtesthelpers.Util;
38
39 public 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 }