svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.plugin / org.gvsig.labeling.app / org.gvsig.labeling.app.mainplugin / src / main / java / org / gvsig / labeling / placements / AbstractLinePlacement.java @ 43510
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1 | 43510 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | 40911 | jldominguez | *
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4 | 43510 | jjdelcerro | * Copyright (C) 2007-2013 gvSIG Association.
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5 | 40911 | jldominguez | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | 43510 | jjdelcerro | * as published by the Free Software Foundation; either version 3
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9 | 40911 | jldominguez | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | 43510 | jjdelcerro | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | 40911 | jldominguez | *
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21 | 43510 | jjdelcerro | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | 40911 | jldominguez | */
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24 | package org.gvsig.labeling.placements; |
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25 | |||
26 | import java.awt.geom.Point2D; |
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27 | import java.awt.geom.Rectangle2D; |
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28 | import java.util.ArrayList; |
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29 | |||
30 | import org.apache.batik.ext.awt.geom.PathLength; |
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31 | import org.gvsig.fmap.geom.Geometry; |
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32 | import org.gvsig.fmap.mapcontext.ViewPort; |
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33 | import org.gvsig.fmap.mapcontext.rendering.legend.styling.ILabelClass; |
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34 | import org.gvsig.fmap.mapcontext.rendering.legend.styling.IPlacementConstraints; |
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35 | import org.gvsig.symbology.fmap.mapcontext.rendering.legend.styling.LabelLocationMetrics; |
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36 | import org.gvsig.tools.task.Cancellable; |
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37 | |||
38 | public abstract class AbstractLinePlacement implements ILabelPlacement { |
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39 | public static final double PI = Math.PI; |
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40 | public static final double HALF_PI = PI * 0.5; |
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41 | 43510 | jjdelcerro | private final ArrayList<LabelLocationMetrics> guessed = |
42 | new ArrayList<>(); |
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43 | 40911 | jldominguez | private static final double TOLERANCE = 1E-2; |
44 | |||
45 | |||
46 | 43510 | jjdelcerro | @Override
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47 | 40911 | jldominguez | public ArrayList<LabelLocationMetrics> guess(ILabelClass lc, Geometry geom, |
48 | IPlacementConstraints pc, double cartographicSymbolSize,
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49 | Cancellable cancel, ViewPort vp) { |
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50 | |||
51 | guessed.clear(); |
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52 | |||
53 | Geometry shp = geom.cloneGeometry(); |
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54 | shp.transform(vp.getAffineTransform()); |
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55 | |||
56 | PathLength pathLen = new PathLength(shp);
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57 | |||
58 | LabelLocationMetrics initial = initialLocation(lc, pc, pathLen, cancel); |
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59 | |||
60 | 43510 | jjdelcerro | if (cancel.isCanceled()) {
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61 | return CannotPlaceLabel.NO_PLACES;
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62 | } |
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63 | 40911 | jldominguez | |
64 | double theta = initial.getRotation();
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65 | |||
66 | |||
67 | double xOffset = 0; |
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68 | double yOffset = 0; |
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69 | Rectangle2D bounds = lc.getBounds();
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70 | |||
71 | if (pc.isPageOriented()) {
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72 | if(theta > HALF_PI) { // from origin to left-down |
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73 | theta = (theta - Math.PI);
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74 | |||
75 | Point2D anchor = initial.getAnchor();
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76 | 41162 | jldominguez | |
77 | double cosTheta = Math.cos(theta); |
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78 | 40911 | jldominguez | double sinTheta = Math.sin(theta); |
79 | double width = bounds.getWidth();
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80 | double height = bounds.getHeight()*1.1; |
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81 | 41162 | jldominguez | initial.getAnchor().setLocation( |
82 | anchor.getX() - cosTheta*width + sinTheta*height, |
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83 | anchor.getY() - sinTheta*width - cosTheta*height); |
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84 | 40911 | jldominguez | } else if (theta < -HALF_PI ) { // from origin to left-up |
85 | 41162 | jldominguez | /*
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86 | 40911 | jldominguez | if (Math.abs(Math.abs(theta) - HALF_PI) -TOLERANCE > 0)
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87 | // the condition avoids errors when segment is almost up-down vertical
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88 | {
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89 | 41162 | jldominguez | */
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90 | 40911 | jldominguez | theta = (theta + Math.PI);
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91 | Point2D anchor = initial.getAnchor();
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92 | double cosTheta = Math.cos(theta); |
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93 | double sinTheta = Math.sin(theta); |
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94 | double width = bounds.getWidth();
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95 | double height = bounds.getHeight()*1.1; |
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96 | initial.getAnchor().setLocation( |
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97 | 41162 | jldominguez | anchor.getX() - cosTheta*width + sinTheta*height, |
98 | anchor.getY() - sinTheta*width - cosTheta*height); |
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99 | |||
100 | // }
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101 | 40911 | jldominguez | } |
102 | |||
103 | |||
104 | } |
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105 | |||
106 | if (pc.isBelowTheLine() ||
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107 | pc.isOnTheLine() || |
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108 | pc.isAboveTheLine()) { |
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109 | |||
110 | double h = bounds.getHeight()*0.5; |
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111 | |||
112 | xOffset += h * Math.sin(theta);
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113 | yOffset += h * Math.cos(theta);
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114 | |||
115 | |||
116 | Point2D initialAnchor = initial.getAnchor();
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117 | // calculate the possibles in the inverse
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118 | // order to the preferred order and add it
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119 | // always in the first position
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120 | if (pc.isBelowTheLine()) {
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121 | Point2D anchor = new Point2D.Double( |
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122 | initialAnchor.getX() + -xOffset, |
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123 | initialAnchor.getY() + +yOffset); |
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124 | guessed.add(0, new LabelLocationMetrics(anchor, theta, false)); |
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125 | } |
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126 | |||
127 | if (pc.isOnTheLine()) {
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128 | guessed.add(0, new LabelLocationMetrics(initial.getAnchor(), theta, false)); |
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129 | } |
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130 | |||
131 | if (pc.isAboveTheLine()) {
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132 | Point2D anchor = new Point2D.Double( |
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133 | initialAnchor.getX() + +xOffset, |
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134 | initialAnchor.getY() + -yOffset); |
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135 | guessed.add(0, new LabelLocationMetrics(anchor, theta, false)); |
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136 | } |
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137 | } else {
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138 | // will say that on the line is legal
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139 | guessed.add(0, initial);
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140 | } |
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141 | return guessed;
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142 | } |
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143 | |||
144 | abstract LabelLocationMetrics initialLocation(
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145 | ILabelClass lc, IPlacementConstraints pc, |
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146 | PathLength pathLen, Cancellable cancel); |
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147 | |||
148 | } |