1 /*
2 * Copyright (c) 2000, 2008, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package javax.swing;
26
27 import java.util.Comparator;
28 import java.util.LinkedList;
29 import java.util.ListIterator;
30 import java.awt.Component;
31 import java.awt.ComponentOrientation;
32 import java.awt.Window;
33
34
35 /**
36 * Comparator which attempts to sort Components based on their size and
37 * position. Code adapted from original javax.swing.DefaultFocusManager
38 * implementation.
39 *
40 * @author David Mendenhall
41 */
42 final class LayoutComparator implements Comparator<Component>, java.io.Serializable {
43
44 private static final int ROW_TOLERANCE = 10;
45
46 private boolean horizontal = true;
47 private boolean leftToRight = true;
48
49 void setComponentOrientation(ComponentOrientation orientation) {
50 horizontal = orientation.isHorizontal();
51 leftToRight = orientation.isLeftToRight();
52 }
53
54 public int compare(Component a, Component b) {
55 if (a == b) {
56 return 0;
57 }
58
59 // Row/Column algorithm only applies to siblings. If 'a' and 'b'
60 // aren't siblings, then we need to find their most inferior
61 // ancestors which share a parent. Compute the ancestory lists for
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1 /*
2 * Copyright (c) 2000, 2014, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package javax.swing;
26
27 import java.util.Comparator;
28 import java.util.LinkedList;
29 import java.util.ListIterator;
30 import java.awt.Component;
31 import java.awt.ComponentOrientation;
32 import java.awt.Window;
33
34
35 /**
36 * Comparator which attempts to sort Components based on their size and
37 * position. Code adapted from original javax.swing.DefaultFocusManager
38 * implementation.
39 *
40 * @author David Mendenhall
41 */
42 @SuppressWarnings("serial") // JDK-implementation class
43 final class LayoutComparator implements Comparator<Component>, java.io.Serializable {
44
45 private static final int ROW_TOLERANCE = 10;
46
47 private boolean horizontal = true;
48 private boolean leftToRight = true;
49
50 void setComponentOrientation(ComponentOrientation orientation) {
51 horizontal = orientation.isHorizontal();
52 leftToRight = orientation.isLeftToRight();
53 }
54
55 public int compare(Component a, Component b) {
56 if (a == b) {
57 return 0;
58 }
59
60 // Row/Column algorithm only applies to siblings. If 'a' and 'b'
61 // aren't siblings, then we need to find their most inferior
62 // ancestors which share a parent. Compute the ancestory lists for
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