1 | /**
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2 | * ColorUtils.java
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3 | * Copyright (C) 2010 New Zealand Digital Library, http://expeditee.org
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4 | *
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5 | * This program is free software: you can redistribute it and/or modify
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6 | * it under the terms of the GNU General Public License as published by
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7 | * the Free Software Foundation, either version 3 of the License, or
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8 | * (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 | */
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18 |
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19 | package org.expeditee.gui;
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20 |
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21 | import org.expeditee.core.Colour;
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22 |
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23 | public class ColorUtils {
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24 |
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25 | /**
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26 | * Gets the next color in the specified color wheel.
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27 | *
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28 | * @param color
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29 | * the current color
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30 | * @param wheel
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31 | * the color wheel from which to find the next color
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32 | * @param skip
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33 | * a color to ignore, for example the current background color
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34 | * when getting the next foreground color or null if no colors
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35 | * should be skipped
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36 | * @return the next color on the color wheel
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37 | */
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38 | public static Colour getNextColor(Colour color, Colour[] wheel, Colour skip) {
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39 | if (color == null) {
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40 | color = wheel[0];
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41 | } else {
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42 | // search through the colour wheel to find the next colour
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43 | int pos = -1;
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44 | for (int i = 0; i < wheel.length; i++) {
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45 | if (color.equals(wheel[i])) {
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46 | pos = i;
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47 | break;
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48 | }
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49 | }
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50 | pos++;
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51 | pos = pos % wheel.length;
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52 | color = wheel[pos];
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53 | }
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54 |
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55 | if (skip != null && skip.equals(color))
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56 | return getNextColor(color, wheel, skip);
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57 |
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58 | return color;
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59 | }
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60 | }
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