1 /*
2 * Copyright (c) 2003-2008 by Cosylab d. d.
3 *
4 * This file is part of CosyBeans-Common.
5 *
6 * CosyBeans-Common is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * CosyBeans-Common is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with CosyBeans-Common. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 package com.cosylab.gui.components.range2;
21
22 /**
23 * This policy enforces the proper order of values. For a triplet of numbers
24 * specified in <code>RangedValueHolder</code> it will rearange them (if
25 * neccessary) so that minimum will be less or equal to value and value will
26 * be less or equal to maximum.
27 *
28 * @author <a href="mailto:ales.pucelj@cosylab.com">Ales Pucelj</a>
29 * @version $id$
30 */
31 public class ProperOrderPolicy extends RangedValuePolicy {
32
33 /**
34 * Swaps the parameters as neccessary to establis proper ordering of values.
35 *
36 * @see com.cosylab.gui.components.range.RangedValuePolicy#validate(RangedValueHolder)
37 */
38 public RangedValue validate(RangedValue params) {
39 double min = params.getMinimum();
40 double max = params.getMaximum();
41 double val = params.getValue();
42
43 double temp;
44
45 if (min > val) {
46 temp = min;
47 min = val;
48 val = temp;
49 }
50 if (min > max) {
51 temp = min;
52 min = max;
53 max = temp;
54 }
55 if (val > max) {
56 temp = val;
57 val = max;
58 max = temp;
59 }
60
61 params = new RangedValue(min, max, val);
62
63 return validatePeerPolicy(params);
64 }
65 }