root / trunk / libraries / libCq_CMS_praster / src / org / cresques / geo / ViewPortData.java @ 8026
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1 | 8026 | nacho | /*
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2 | * Cresques Mapping Suite. Graphic Library for constructing mapping applications.
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3 | *
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4 | * Copyright (C) 2004-5.
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5 | *
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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 | * as published by the Free Software Foundation; either version 2
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9 | * 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 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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19 | *
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20 | * For more information, contact:
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21 | *
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22 | * cresques@gmail.com
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23 | */
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24 | package org.cresques.geo; |
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25 | |||
26 | import org.cresques.cts.ICoordTrans; |
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27 | import org.cresques.cts.IProjection; |
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28 | |||
29 | import org.cresques.px.Extent; |
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30 | |||
31 | import java.awt.Dimension; |
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32 | import java.awt.geom.AffineTransform; |
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33 | import java.awt.geom.Dimension2D; |
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34 | import java.awt.geom.Point2D; |
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35 | |||
36 | import java.text.DecimalFormat; |
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37 | |||
38 | |||
39 | /**
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40 | * Datos de vista sobre las capas.
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41 | *
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42 | * Mantiene un conjunto de datos necesarios, que describen el modo de
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43 | * ver las capas actual.
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44 | *
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45 | * @author "Luis W. Sevilla" <sevilla_lui@gva.es>
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46 | */
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47 | public class ViewPortData implements Projected { |
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48 | /**
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49 | * Tipo de proyecci?n de la vista.
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50 | */
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51 | IProjection proj = null;
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52 | |||
53 | /**
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54 | * Sistema de coordenadas de la vista.
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55 | */
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56 | IProjection cs = null;
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57 | |||
58 | /**
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59 | * Amplitud de la vista, en coordenadas proyectadas.
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60 | */
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61 | Extent extent = null;
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62 | |||
63 | /**
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64 | * Tama?o de la vista, en coordenadas de dispositivo.
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65 | */
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66 | Dimension2D size = null; |
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67 | |||
68 | /**
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69 | * Transformaci?n af?n usada en la vista actual.
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70 | */
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71 | public AffineTransform mat = null; |
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72 | |||
73 | /**
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74 | * Resoluci?n (Puntos por pulgada) de la vista actual.
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75 | * Se necesita para los c?lculos de escala geogr?fica.
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76 | */
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77 | int dpi = java.awt.Toolkit.getDefaultToolkit().getScreenResolution();
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78 | |||
79 | public ViewPortData() {
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80 | } |
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81 | |||
82 | public ViewPortData(IProjection proj, Extent extent, Dimension2D size) { |
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83 | this.proj = proj;
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84 | this.extent = extent;
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85 | this.size = size;
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86 | mat = new AffineTransform(); |
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87 | mat.scale(1.0, -1.0); |
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88 | } |
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89 | |||
90 | public IProjection getProjection() {
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91 | return proj;
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92 | } |
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93 | |||
94 | public void setProjection(IProjection proj) { |
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95 | this.proj = proj;
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96 | } |
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97 | |||
98 | public void reProject(ICoordTrans rp) { |
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99 | // TODO metodo reProject pendiente de implementar
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100 | } |
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101 | |||
102 | public void setCoordSys(IProjection cs) { |
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103 | this.cs = cs;
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104 | } |
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105 | |||
106 | //public void setCoordTrans(ICoordTrans ct) { this.ct = ct; }
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107 | public AffineTransform getMat() { |
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108 | return mat;
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109 | } |
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110 | |||
111 | public void setMat(AffineTransform mat) { |
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112 | this.mat = mat;
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113 | } |
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114 | |||
115 | public Object clone() { |
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116 | ViewPortData vp = new ViewPortData();
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117 | |||
118 | if (mat != null) { |
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119 | vp.mat = new AffineTransform(mat); |
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120 | } |
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121 | |||
122 | if (extent != null) { |
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123 | vp.extent = new Extent(extent);
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124 | } |
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125 | |||
126 | vp.proj = proj; |
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127 | vp.size = size; |
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128 | vp.dpi = dpi; |
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129 | |||
130 | return vp;
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131 | } |
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132 | |||
133 | public double getWidth() { |
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134 | return size.getWidth();
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135 | } |
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136 | |||
137 | public double getHeight() { |
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138 | return size.getHeight();
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139 | } |
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140 | |||
141 | /**
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142 | *
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143 | */
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144 | public Dimension2D getSize() { |
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145 | return size;
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146 | } |
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147 | |||
148 | public void setSize(double w, double h) { |
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149 | setSize(new Dimension((int) w, (int) h)); |
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150 | } |
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151 | |||
152 | public void setSize(Dimension2D sz) { |
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153 | size = sz; |
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154 | reExtent(); |
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155 | } |
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156 | |||
157 | public Extent getExtent() {
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158 | return extent;
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159 | } |
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160 | |||
161 | public void setExtent(Dimension2D sz) { |
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162 | Point2D.Double pt0 = new Point2D.Double(0, 0); |
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163 | Point2D.Double ptSz = new Point2D.Double(sz.getWidth(), sz.getHeight()); |
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164 | |||
165 | try {
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166 | mat.inverseTransform(pt0, pt0); |
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167 | mat.inverseTransform(ptSz, ptSz); |
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168 | } catch (Exception e) { |
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169 | e.printStackTrace(); |
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170 | } |
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171 | |||
172 | extent = new Extent(pt0, ptSz);
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173 | } |
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174 | |||
175 | public void reExtent() { |
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176 | setExtent(size); |
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177 | } |
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178 | |||
179 | public void setDPI(int dpi) { |
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180 | this.dpi = dpi;
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181 | } |
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182 | |||
183 | public int getDPI() { |
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184 | return this.dpi; |
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185 | } |
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186 | |||
187 | /**
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188 | * zoom a un marco.
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189 | *
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190 | * @param extent
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191 | */
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192 | public void zoom(Extent extent) { |
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193 | double[] scale = extent.getScale(getWidth(), getHeight()); |
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194 | double escala = Math.min(scale[0], scale[1]); |
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195 | |||
196 | mat.setToIdentity(); |
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197 | mat.scale(escala, -escala); |
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198 | mat.translate(-extent.minX(), -extent.maxY()); |
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199 | this.extent = extent;
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200 | reExtent(); |
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201 | } |
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202 | |||
203 | /**
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204 | * zoom centrado en un punto.
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205 | *
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206 | * @param zoom
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207 | * @param pt
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208 | */
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209 | public void zoom(double zoom, Point2D pt) { |
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210 | zoom(zoom, zoom, pt); |
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211 | } |
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212 | |||
213 | public void zoom(double zx, double zy, Point2D pt) { |
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214 | centerAt(pt); |
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215 | mat.scale(zx, zy); |
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216 | centerAt(pt); |
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217 | reExtent(); |
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218 | } |
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219 | |||
220 | /**
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221 | * Zoom a una escala (geogr?fica);
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222 | *
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223 | * @param scale
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224 | */
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225 | public void zoomToGeoScale(double scale) { |
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226 | double actual = getGeoScale();
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227 | double f = actual / scale;
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228 | zoomToCenter(f); |
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229 | } |
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230 | |||
231 | /**
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232 | * Zoom a una escala (geogr?fica);
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233 | *
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234 | * @param scale
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235 | */
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236 | public void zoomToCenter(double f) { |
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237 | Point2D.Double ptCenter = new Point2D.Double(getWidth() / 2.0, |
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238 | getHeight() / 2.0);
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239 | |||
240 | try {
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241 | mat.inverseTransform(ptCenter, ptCenter); |
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242 | } catch (Exception e) { |
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243 | e.printStackTrace(); |
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244 | } |
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245 | |||
246 | zoom(f, ptCenter); |
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247 | } |
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248 | |||
249 | /**
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250 | * Centrar en un punto.
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251 | *
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252 | * @param pt
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253 | */
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254 | public void centerAt(Point2D pt) { |
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255 | Point2D.Double ptCenter = new Point2D.Double(getWidth() / 2.0, |
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256 | getHeight() / 2.0);
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257 | |||
258 | try {
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259 | mat.inverseTransform(ptCenter, ptCenter); |
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260 | mat.translate(ptCenter.x - pt.getX(), ptCenter.y - pt.getY()); |
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261 | } catch (Exception e) { |
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262 | e.printStackTrace(); |
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263 | } |
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264 | |||
265 | reExtent(); |
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266 | } |
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267 | |||
268 | /**
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269 | * Desplaza la vista actual.
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270 | *
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271 | * @param pt
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272 | */
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273 | public void pan(Point2D ptIni, Point2D ptFin) { |
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274 | mat.translate(ptFin.getX() - ptIni.getX(), ptFin.getY() - ptIni.getY()); |
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275 | reExtent(); |
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276 | } |
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277 | |||
278 | public Point2D getCenter() { |
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279 | Point2D.Double ptCenter = new Point2D.Double(getWidth() / 2.0, |
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280 | getHeight() / 2.0);
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281 | |||
282 | try {
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283 | mat.inverseTransform(ptCenter, ptCenter); |
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284 | } catch (Exception e) { |
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285 | e.printStackTrace(); |
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286 | } |
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287 | |||
288 | return ptCenter;
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289 | } |
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290 | |||
291 | /**
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292 | * Escala Geogr?fica.
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293 | *
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294 | * @param dpi resolucion en puntos por pulgada
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295 | */
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296 | public double getGeoScale() { |
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297 | /* // TODO Actulizarlo para Geotools2
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298 | double scale = 0.0;
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299 | if (proj.getClass() == UtmZone.class) { // UTM;
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300 | scale = (extent.maxX()-extent.minX())* // metros
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301 | (dpi / 2.54 * 100.0)/ // px / metro
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302 | getWidth(); // pixels
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303 | } else if (proj.getClass() == Geodetic.class) { // Geodetic
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304 | scale = (extent.maxX()-extent.minX())* // grados
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305 | // 1852.0 metros x minuto de meridiano
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306 | (dpi / 2.54 * 100.0 * 1852.0 * 60.0)/ // px / metro
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307 | getWidth(); // pixels
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308 | } else if (proj.getClass() == Mercator.class) { // Mercator
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309 | Projection prj = Geodetic.getProjection((Ellipsoid) proj.getDatum());
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310 | GeoPoint pt1 = (GeoPoint) prj.createPoint(1.0,0.0);
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311 | GeoPoint pt2 = (GeoPoint) prj.createPoint(2.0,0.0);
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312 | ProjPoint ppt1 = (ProjPoint) proj.createPoint(0.0, 0.0);
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313 | ProjPoint ppt2 = (ProjPoint) proj.createPoint(0.0, 0.0);
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314 | ((Mercator) proj).fromGeo(pt1, ppt1);
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315 | ((Mercator) proj).fromGeo(pt2, ppt2);
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316 | //scale = ppt2.getX()-ppt1.getX();
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317 | scale = ((extent.maxX()-extent.minX())/ (ppt2.getX()-ppt1.getX()) ) *
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318 | //scale = ((extent.maxX()-extent.minX())/ getWidth());// *
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319 | (dpi / 2.54 * 100.0 * 1852.0 * 60.0) /
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320 | getWidth();
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321 | } */
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322 | return proj.getScale(extent.minX(), extent.maxX(), getWidth(), dpi);
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323 | } |
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324 | |||
325 | public String getGeoScaleAsString(String fmt) { |
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326 | DecimalFormat format = new DecimalFormat(fmt); |
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327 | |||
328 | return "1:" + format.format(getGeoScale()); |
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329 | } |
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330 | } |