svn-gvsig-desktop / tags / v1_0_2_Build_905 / extensions / extCAD / src / com / iver / cit / gvsig / gui / cad / snapping / PixelSnapper.java @ 10767
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1 | 6771 | fjp | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (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, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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18 | *
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19 | * For more information, contact:
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20 | *
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21 | * Generalitat Valenciana
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22 | * Conselleria d'Infraestructures i Transport
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23 | * Av. Blasco Ib??ez, 50
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24 | * 46010 VALENCIA
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25 | * SPAIN
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26 | *
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27 | * +34 963862235
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28 | * gvsig@gva.es
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29 | * www.gvsig.gva.es
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30 | *
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31 | * or
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32 | *
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33 | * IVER T.I. S.A
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34 | * Salamanca 50
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35 | * 46005 Valencia
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36 | * Spain
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37 | *
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38 | * +34 963163400
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39 | * dac@iver.es
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40 | */
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41 | package com.iver.cit.gvsig.gui.cad.snapping; |
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42 | |||
43 | import java.awt.Color; |
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44 | import java.awt.Graphics; |
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45 | import java.awt.geom.Point2D; |
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46 | import java.awt.image.BufferedImage; |
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47 | import java.awt.image.ColorModel; |
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48 | |||
49 | import com.iver.andami.PluginServices; |
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50 | import com.iver.cit.gvsig.fmap.MapControl; |
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51 | import com.iver.cit.gvsig.fmap.ViewPort; |
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52 | import com.vividsolutions.jts.geom.Coordinate; |
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53 | |||
54 | public class PixelSnapper extends AbstractSnapper implements ISnapperRaster { |
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55 | |||
56 | private Color refColor = Color.BLACK; |
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57 | private int tolColorR = 100; |
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58 | private int tolColorG = 100; |
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59 | private int tolColorB = 100; |
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60 | /* (non-Javadoc)
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61 | * @see com.iver.cit.gvsig.gui.cad.snapping.ISnapperRaster#getSnapPoint(java.awt.image.BufferedImage, java.awt.geom.Point2D, double, java.awt.geom.Point2D)
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62 | */
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63 | public Point2D getSnapPoint(MapControl mapControl, Point2D point, |
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64 | double mapTolerance, Point2D lastPoint) { |
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65 | // Miramos dentro del rect?ngulo que define la tolerancia
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66 | // y nos quedamos con el pixel que m?s se acerca al que buscamos
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67 | BufferedImage img = mapControl.getImage();
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68 | ViewPort vp = mapControl.getViewPort(); |
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69 | Point2D pPixel = vp.fromMapPoint(point);
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70 | int xPixel = (int) pPixel.getX(); |
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71 | int yPixel = (int) pPixel.getY(); |
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72 | // int centerRGB = img.getRGB(xPixel, yPixel);
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73 | int centerRGB = refColor.getRGB();
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74 | double x1 = ColorModel.getRGBdefault().getRed(centerRGB); |
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75 | double y1 = ColorModel.getRGBdefault().getGreen(centerRGB); |
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76 | double z1 = ColorModel.getRGBdefault().getBlue(centerRGB); |
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77 | Coordinate c = new Coordinate(x1, y1, z1);
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78 | |||
79 | int half = vp.fromMapDistance(mapTolerance) / 2; |
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80 | double minDistColor = Double.MAX_VALUE; |
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81 | int xSnapped = -1; |
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82 | int ySnapped = -1; |
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83 | int fromX =xPixel -half;
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84 | if (fromX <0) fromX = 0; |
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85 | int fromY =yPixel -half;
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86 | if (fromY <0) fromY = 0; |
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87 | |||
88 | int toX =xPixel + half;
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89 | if (toX > vp.getImageWidth()) toX = vp.getImageWidth();
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90 | int toY =yPixel + half;
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91 | if (toY > vp.getImageHeight()) toY = vp.getImageHeight();
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92 | |||
93 | for (int testX= fromX; testX< toX; testX++) |
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94 | { |
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95 | for (int testY= fromY; testY< toY; testY++) |
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96 | { |
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97 | // System.out.println("Testing: " + testX + ", " + testY);
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98 | int testRGB = img.getRGB(testX, testY);
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99 | // TODO: Aqu? deber?amos trabajar con un ColorSpace y usar toCIEXYZ. Por ahora lo calculo con RGB.
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100 | int r = ColorModel.getRGBdefault().getRed(testRGB); |
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101 | int g = ColorModel.getRGBdefault().getGreen(testRGB); |
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102 | int b = ColorModel.getRGBdefault().getBlue(testRGB); |
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103 | Coordinate cAux = new Coordinate(r, g, b);
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104 | |||
105 | if (Math.abs(r-x1) < tolColorR) |
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106 | if (Math.abs(g-y1) < tolColorG) |
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107 | if (Math.abs(b-z1) < tolColorB) |
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108 | { |
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109 | double dist = c.distance(cAux);
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110 | if (dist < minDistColor)
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111 | { |
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112 | minDistColor = dist; |
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113 | xSnapped = testX; |
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114 | ySnapped = testY; |
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115 | } |
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116 | } |
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117 | } |
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118 | } |
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119 | Point2D pResul = null; |
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120 | if (xSnapped != -1) |
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121 | { |
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122 | pResul = vp.toMapPoint(xSnapped, ySnapped); |
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123 | } |
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124 | return pResul;
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125 | } |
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126 | |||
127 | public void draw(Graphics g, Point2D pPixels) { |
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128 | g.setColor(getColor()); |
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129 | int half = getSizePixels() / 2; |
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130 | g.drawOval((int) (pPixels.getX() - half),
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131 | (int) (pPixels.getY() - half),
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132 | getSizePixels(), getSizePixels()); |
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133 | } |
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134 | |||
135 | public String getToolTipText() { |
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136 | return PluginServices.getText(this, "pixel_point"); |
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137 | } |
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138 | |||
139 | public int getPriority() { |
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140 | return 3; |
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141 | } |
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142 | |||
143 | } |
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144 |