root / trunk / libraries / libRaster / src / org / gvsig / raster / shared / ViewPortData.java @ 11067
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1 | 10740 | nacho | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2006 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 | package org.gvsig.raster.shared; |
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20 | |||
21 | import java.awt.Dimension; |
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22 | import java.awt.geom.AffineTransform; |
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23 | import java.awt.geom.Dimension2D; |
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24 | import java.awt.geom.Point2D; |
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25 | import java.text.DecimalFormat; |
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26 | |||
27 | import org.cresques.cts.ICoordTrans; |
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28 | import org.cresques.cts.IProjection; |
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29 | import org.cresques.geo.Projected; |
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30 | |||
31 | |||
32 | /**
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33 | * Datos de vista sobre las capas.
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34 | *
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35 | * Mantiene un conjunto de datos necesarios, que describen el modo de
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36 | * ver las capas actual.
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37 | *
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38 | * @author "Luis W. Sevilla" <sevilla_lui@gva.es>
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39 | */
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40 | public class ViewPortData implements Projected { |
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41 | /**
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42 | * Tipo de proyecci?n de la vista.
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43 | */
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44 | IProjection proj = null;
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45 | |||
46 | /**
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47 | * Sistema de coordenadas de la vista.
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48 | */
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49 | IProjection cs = null;
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50 | |||
51 | /**
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52 | * Amplitud de la vista, en coordenadas proyectadas.
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53 | */
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54 | Extent extent = null;
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55 | |||
56 | /**
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57 | * Tama?o de la vista, en coordenadas de dispositivo.
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58 | */
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59 | Dimension2D size = null; |
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60 | |||
61 | /**
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62 | * Transformaci?n af?n usada en la vista actual.
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63 | */
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64 | public AffineTransform mat = null; |
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65 | |||
66 | /**
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67 | * Resoluci?n (Puntos por pulgada) de la vista actual.
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68 | * Se necesita para los c?lculos de escala geogr?fica.
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69 | */
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70 | int dpi = java.awt.Toolkit.getDefaultToolkit().getScreenResolution();
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71 | |||
72 | public ViewPortData() {
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73 | } |
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74 | |||
75 | public ViewPortData(IProjection proj, Extent extent, Dimension2D size) { |
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76 | this.proj = proj;
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77 | this.extent = extent;
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78 | this.size = size;
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79 | mat = new AffineTransform(); |
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80 | mat.scale(1.0, -1.0); |
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81 | } |
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82 | |||
83 | public IProjection getProjection() {
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84 | return proj;
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85 | } |
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86 | |||
87 | public void setProjection(IProjection proj) { |
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88 | this.proj = proj;
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89 | } |
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90 | |||
91 | public void reProject(ICoordTrans rp) { |
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92 | // TODO metodo reProject pendiente de implementar
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93 | } |
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94 | |||
95 | public void setCoordSys(IProjection cs) { |
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96 | this.cs = cs;
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97 | } |
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98 | |||
99 | //public void setCoordTrans(ICoordTrans ct) { this.ct = ct; }
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100 | public AffineTransform getMat() { |
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101 | return mat;
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102 | } |
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103 | |||
104 | public void setMat(AffineTransform mat) { |
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105 | this.mat = mat;
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106 | } |
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107 | |||
108 | public Object clone() { |
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109 | ViewPortData vp = new ViewPortData();
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110 | |||
111 | if (mat != null) { |
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112 | vp.mat = new AffineTransform(mat); |
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113 | } |
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114 | |||
115 | if (extent != null) { |
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116 | vp.extent = new Extent(extent);
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117 | } |
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118 | |||
119 | vp.proj = proj; |
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120 | vp.size = size; |
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121 | vp.dpi = dpi; |
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122 | |||
123 | return vp;
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124 | } |
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125 | |||
126 | public double getWidth() { |
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127 | return size.getWidth();
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128 | } |
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129 | |||
130 | public double getHeight() { |
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131 | return size.getHeight();
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132 | } |
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133 | |||
134 | /**
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135 | *
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136 | */
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137 | public Dimension2D getSize() { |
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138 | return size;
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139 | } |
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140 | |||
141 | public void setSize(double w, double h) { |
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142 | setSize(new Dimension((int) w, (int) h)); |
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143 | } |
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144 | |||
145 | public void setSize(Dimension2D sz) { |
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146 | size = sz; |
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147 | reExtent(); |
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148 | } |
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149 | |||
150 | public Extent getExtent() {
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151 | return extent;
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152 | } |
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153 | |||
154 | public void setExtent(Dimension2D sz) { |
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155 | Point2D.Double pt0 = new Point2D.Double(0, 0); |
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156 | Point2D.Double ptSz = new Point2D.Double(sz.getWidth(), sz.getHeight()); |
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157 | |||
158 | try {
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159 | mat.inverseTransform(pt0, pt0); |
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160 | mat.inverseTransform(ptSz, ptSz); |
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161 | } catch (Exception e) { |
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162 | e.printStackTrace(); |
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163 | } |
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164 | |||
165 | extent = new Extent(pt0, ptSz);
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166 | } |
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167 | |||
168 | public void reExtent() { |
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169 | setExtent(size); |
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170 | } |
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171 | |||
172 | public void setDPI(int dpi) { |
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173 | this.dpi = dpi;
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174 | } |
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175 | |||
176 | public int getDPI() { |
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177 | return this.dpi; |
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178 | } |
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179 | |||
180 | /**
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181 | * zoom a un marco.
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182 | *
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183 | * @param extent
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184 | */
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185 | public void zoom(Extent extent) { |
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186 | double[] scale = extent.getScale(getWidth(), getHeight()); |
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187 | double escala = Math.min(scale[0], scale[1]); |
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188 | |||
189 | mat.setToIdentity(); |
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190 | mat.scale(escala, -escala); |
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191 | mat.translate(-extent.minX(), -extent.maxY()); |
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192 | this.extent = extent;
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193 | reExtent(); |
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194 | } |
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195 | |||
196 | /**
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197 | * zoom centrado en un punto.
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198 | *
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199 | * @param zoom
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200 | * @param pt
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201 | */
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202 | public void zoom(double zoom, Point2D pt) { |
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203 | zoom(zoom, zoom, pt); |
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204 | } |
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205 | |||
206 | public void zoom(double zx, double zy, Point2D pt) { |
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207 | centerAt(pt); |
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208 | mat.scale(zx, zy); |
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209 | centerAt(pt); |
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210 | reExtent(); |
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211 | } |
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212 | |||
213 | /**
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214 | * Zoom a una escala (geogr?fica);
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215 | *
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216 | * @param scale
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217 | */
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218 | public void zoomToGeoScale(double scale) { |
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219 | double actual = getGeoScale();
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220 | double f = actual / scale;
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221 | zoomToCenter(f); |
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222 | } |
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223 | |||
224 | /**
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225 | * Zoom a una escala (geogr?fica);
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226 | *
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227 | * @param scale
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228 | */
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229 | public void zoomToCenter(double f) { |
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230 | Point2D.Double ptCenter = new Point2D.Double(getWidth() / 2.0, |
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231 | getHeight() / 2.0);
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232 | |||
233 | try {
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234 | mat.inverseTransform(ptCenter, ptCenter); |
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235 | } catch (Exception e) { |
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236 | e.printStackTrace(); |
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237 | } |
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238 | |||
239 | zoom(f, ptCenter); |
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240 | } |
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241 | |||
242 | /**
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243 | * Centrar en un punto.
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244 | *
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245 | * @param pt
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246 | */
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247 | public void centerAt(Point2D pt) { |
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248 | Point2D.Double ptCenter = new Point2D.Double(getWidth() / 2.0, |
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249 | getHeight() / 2.0);
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250 | |||
251 | try {
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252 | mat.inverseTransform(ptCenter, ptCenter); |
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253 | mat.translate(ptCenter.x - pt.getX(), ptCenter.y - pt.getY()); |
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254 | } catch (Exception e) { |
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255 | e.printStackTrace(); |
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256 | } |
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257 | |||
258 | reExtent(); |
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259 | } |
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260 | |||
261 | /**
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262 | * Desplaza la vista actual.
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263 | *
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264 | * @param pt
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265 | */
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266 | public void pan(Point2D ptIni, Point2D ptFin) { |
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267 | mat.translate(ptFin.getX() - ptIni.getX(), ptFin.getY() - ptIni.getY()); |
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268 | reExtent(); |
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269 | } |
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270 | |||
271 | public Point2D getCenter() { |
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272 | Point2D.Double ptCenter = new Point2D.Double(getWidth() / 2.0, |
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273 | getHeight() / 2.0);
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274 | |||
275 | try {
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276 | mat.inverseTransform(ptCenter, ptCenter); |
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277 | } catch (Exception e) { |
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278 | e.printStackTrace(); |
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279 | } |
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280 | |||
281 | return ptCenter;
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282 | } |
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283 | |||
284 | /**
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285 | * Escala Geogr?fica.
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286 | *
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287 | * @param dpi resolucion en puntos por pulgada
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288 | */
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289 | public double getGeoScale() { |
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290 | /* // TODO Actulizarlo para Geotools2
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291 | double scale = 0.0;
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292 | if (proj.getClass() == UtmZone.class) { // UTM;
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293 | scale = (extent.maxX()-extent.minX())* // metros
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294 | (dpi / 2.54 * 100.0)/ // px / metro
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295 | getWidth(); // pixels
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296 | } else if (proj.getClass() == Geodetic.class) { // Geodetic
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297 | scale = (extent.maxX()-extent.minX())* // grados
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298 | // 1852.0 metros x minuto de meridiano
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299 | (dpi / 2.54 * 100.0 * 1852.0 * 60.0)/ // px / metro
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300 | getWidth(); // pixels
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301 | } else if (proj.getClass() == Mercator.class) { // Mercator
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302 | Projection prj = Geodetic.getProjection((Ellipsoid) proj.getDatum());
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303 | GeoPoint pt1 = (GeoPoint) prj.createPoint(1.0,0.0);
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304 | GeoPoint pt2 = (GeoPoint) prj.createPoint(2.0,0.0);
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305 | ProjPoint ppt1 = (ProjPoint) proj.createPoint(0.0, 0.0);
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306 | ProjPoint ppt2 = (ProjPoint) proj.createPoint(0.0, 0.0);
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307 | ((Mercator) proj).fromGeo(pt1, ppt1);
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308 | ((Mercator) proj).fromGeo(pt2, ppt2);
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309 | //scale = ppt2.getX()-ppt1.getX();
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310 | scale = ((extent.maxX()-extent.minX())/ (ppt2.getX()-ppt1.getX()) ) *
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311 | //scale = ((extent.maxX()-extent.minX())/ getWidth());// *
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312 | (dpi / 2.54 * 100.0 * 1852.0 * 60.0) /
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313 | getWidth();
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314 | } */
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315 | return proj.getScale(extent.minX(), extent.maxX(), getWidth(), dpi);
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316 | } |
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317 | |||
318 | public String getGeoScaleAsString(String fmt) { |
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319 | DecimalFormat format = new DecimalFormat(fmt); |
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320 | |||
321 | return "1:" + format.format(getGeoScale()); |
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322 | } |
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323 | } |