1 /*
2 * Copyright (c) 2006, 2016, 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 @key headful
27 @bug 4370316
28 @summary GridLayout does not centre its component properly
29 (summary was GridLayout does not fill its Container)
30 @library ../../regtesthelpers
31 @build Util
32 @author Andrei Dmitriev : area=awt.layout
33 @run main LayoutExtraGaps
34 */
35
36 import java.awt.*;
37 import java.awt.event.*;
38 import test.java.awt.regtesthelpers.Util;
39
40 public class LayoutExtraGaps extends Frame {
41 final static int compCount = 30;
42
43 public LayoutExtraGaps() {
44 super("GridLayoutTest");
45 Panel yellowPanel = new Panel(new GridLayout(compCount, 1, 3, 3));
46 yellowPanel.setBackground(Color.yellow);
47
48 for(int i = 0; i < compCount ; i++) {
49 Label redLabel = new Label(""+i);
50 redLabel.setBackground(Color.red);
51 yellowPanel.add(redLabel);
52 }
53
54 Panel bluePanel = new Panel(new GridLayout(1, compCount, 3, 3));
55 bluePanel.setBackground(Color.blue);
56
57 for(int i = 0; i < compCount; i++) {
58 Label greenLabel = new Label(""+i);
59 greenLabel.setBackground(Color.green);
60 bluePanel.add(greenLabel);
61 }
62
63 //RTL orientation
64 Panel blackPanel = new Panel(new GridLayout(compCount, 1, 3, 3));
65 blackPanel.setBackground(Color.black);
66 blackPanel.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
67
68 for(int i = 0; i < compCount ; i++) {
69 Label redLabel = new Label(""+i);
70 redLabel.setBackground(Color.red);
71 blackPanel.add(redLabel);
72 }
73
74 Panel redPanel = new Panel(new GridLayout(1, compCount, 3, 3));
75 redPanel.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
76 redPanel.setBackground(Color.red);
77
78 for(int i = 0; i < compCount; i++) {
79 Label greenLabel = new Label(""+i);
80 greenLabel.setBackground(Color.green);
81 redPanel.add(greenLabel);
82 }
83
84 setLayout(new GridLayout(2, 2, 20, 20));
85
86 add(yellowPanel);
87 add(bluePanel);
88 add(redPanel);
89 add(blackPanel);
90 pack();
91 setSize((int)getPreferredSize().getWidth() + 50, (int)getPreferredSize().getHeight() + 50);
92 setVisible(true);
93
94 Util.waitForIdle(Util.createRobot());
95
96 if (isComponentCentredLTR(yellowPanel) && isComponentCentredLTR(bluePanel)
97 && isComponentCentredLTR(blackPanel) && isComponentCentredRTL(redPanel))
98 {
99 System.out.println("Test passed.");
100 } else {
101 throw new RuntimeException("Test failed. GridLayout doesn't center component.");
102 }
103 }
104
105 /**
106 * Checks if the components under Panel p are properly centred (i.e.
107 * opposite borders between the Panel and component are equal). Panel p
108 * must not be affect by RTL orientation (RTL only affects horizontal
109 * positioning and components lay out from top right corner).
110 *
111 * @param p the panel where the components exist and is not affected
112 * by right to left orientation
113 * @return true if components of panel p are properly centre, false
114 * otherwise
115 */
116 public static boolean isComponentCentredLTR(Panel p) {
117 double borderLeft;
118 double borderRight;
119 double borderTop;
120 double borderBottom;
121
122 //The first component(rectangle) in panel p.
123 Rectangle firstRec = p.getComponent(0).getBounds();
124
125 //The last component(rectangle) in panel p.
126 Rectangle lastRec = p.getComponent(compCount - 1).getBounds();
127
128 System.out.println("bounds of the first rectangle in "+ p.getName() + " = " + firstRec);
129 System.out.println("bounds of the last rectangle in "+ p.getName() + " = " + lastRec);
130
131 borderLeft = firstRec.getX();
132 borderRight = p.getWidth() - lastRec.getWidth() - lastRec.getX();
133 borderTop = firstRec.getY();
134 borderBottom = p.getHeight() - lastRec.getHeight() - lastRec.getY();
135
136 return areBordersEqual(borderLeft, borderRight) &&
137 areBordersEqual(borderTop, borderBottom);
138 }
139
140 /**
141 * Checks if the components under Panel p are properly centred (i.e.
142 * opposite borders between the Panel and component are equal). Panel p
143 * must be affect by RTL orientation (RTL only affects horizontal positioning
144 * and components lay out from top right corner).
145 *
146 * @param p the panel where the components exist and is affected by
147 * right to left orientation
148 * @return true if components of panel p are properly centre, false
149 * otherwise
150 */
151 public static boolean isComponentCentredRTL(Panel p) {
152 double borderLeft;
153 double borderRight;
154 double borderTop;
155 double borderBottom;
156
157 //The first component(rectangle) in panel p.
158 Rectangle firstRec = p.getComponent(0).getBounds();
159
160 //The last component(rectangle) in panel p.
161 Rectangle lastRec = p.getComponent(compCount - 1).getBounds();
162
163 System.out.println("bounds of the first rectangle in "+ p.getName() + " = " + firstRec);
164 System.out.println("bounds of the last rectangle in "+ p.getName() + " = " + lastRec);
165
166 borderLeft = lastRec.getX();
167 borderRight = p.getWidth() - firstRec.getWidth() - firstRec.getX();
168 borderTop = lastRec.getY();
169 borderBottom = p.getHeight() - firstRec.getHeight() - firstRec.getY();
170
171 return areBordersEqual(borderLeft, borderRight) &&
172 areBordersEqual(borderTop, borderBottom);
173 }
174
175 /**
176 * Given two borders border1 and border2 check if they are equal.
177 *
178 * @param border1 one of the borders being compared
179 * @param border2 the other border being compared
180 * @return true if border1 and border2 are equal to each other (i.e.
181 * their width/height difference is at most 1, assuming the
182 * smallest pixel is of size 1), false otherwise
183 */
184 public static boolean areBordersEqual(double border1, double border2) {
185 return Math.abs(border1 - border2) <= 1;
186 }
187
188 public static void main(String[] args) {
189 new LayoutExtraGaps();
190 }
191 }