1 /*
2 * Copyright (c) 1999, 2007, 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
38 *
39 * @author Eric Hawkes
40 * @since 1.3
41 */
42 public class RepaintArea {
43
44 /**
45 * Maximum ratio of bounding rectangle to benefit for which
46 * both the vertical and horizontal unions are repainted.
47 * For smaller ratios the whole bounding rectangle is repainted.
48 * @see #paint
49 */
50 private static final int MAX_BENEFIT_RATIO = 4;
51
52 private static final int HORIZONTAL = 0;
53 private static final int VERTICAL = 1;
54 private static final int UPDATE = 2;
55
56 private static final int RECT_COUNT = UPDATE + 1;
57
58 private Rectangle paintRects[] = new Rectangle[RECT_COUNT];
59
60
61 /**
62 * Constructs a new {@code RepaintArea}
63 * @since 1.3
64 */
65 public RepaintArea() {
66 }
67
68 /**
69 * Constructs a new {@code RepaintArea} initialized to match
70 * the values of the specified RepaintArea.
71 *
72 * @param ra the {@code RepaintArea} from which to copy initial
73 * values to a newly constructed RepaintArea
74 * @since 1.3
75 */
76 private RepaintArea(RepaintArea ra) {
77 // This constructor is private because it should only be called
78 // from the cloneAndReset method
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1 /*
2 * Copyright (c) 1999, 2018, 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
38 *
39 * @author Eric Hawkes
40 * @since 1.3
41 */
42 public class RepaintArea {
43
44 /**
45 * Maximum ratio of bounding rectangle to benefit for which
46 * both the vertical and horizontal unions are repainted.
47 * For smaller ratios the whole bounding rectangle is repainted.
48 * @see #paint
49 */
50 private static final int MAX_BENEFIT_RATIO = 4;
51
52 private static final int HORIZONTAL = 0;
53 private static final int VERTICAL = 1;
54 private static final int UPDATE = 2;
55
56 private static final int RECT_COUNT = UPDATE + 1;
57
58 private Rectangle[] paintRects = new Rectangle[RECT_COUNT];
59
60
61 /**
62 * Constructs a new {@code RepaintArea}
63 * @since 1.3
64 */
65 public RepaintArea() {
66 }
67
68 /**
69 * Constructs a new {@code RepaintArea} initialized to match
70 * the values of the specified RepaintArea.
71 *
72 * @param ra the {@code RepaintArea} from which to copy initial
73 * values to a newly constructed RepaintArea
74 * @since 1.3
75 */
76 private RepaintArea(RepaintArea ra) {
77 // This constructor is private because it should only be called
78 // from the cloneAndReset method
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