svn-gvsig-desktop / trunk / libraries / libCq CMS for java.old / src / org / cresques / geo / ViewPortData.java @ 92
History | View | Annotate | Download (5.8 KB)
1 |
/*
|
---|---|
2 |
* Created on 25-abr-2004
|
3 |
*/
|
4 |
package org.cresques.geo; |
5 |
|
6 |
import java.awt.Dimension; |
7 |
import java.awt.geom.AffineTransform; |
8 |
import java.awt.geom.Dimension2D; |
9 |
import java.awt.geom.Point2D; |
10 |
import java.text.DecimalFormat; |
11 |
|
12 |
import org.cresques.px.Extent; |
13 |
|
14 |
/**
|
15 |
* Datos de vista sobre las capas.
|
16 |
*
|
17 |
* Mantiene un conjunto de datos necesarios, que describen el modo de
|
18 |
* ver las capas actual.
|
19 |
*
|
20 |
* @author "Luis W. Sevilla" <sevilla_lui@gva.es>
|
21 |
*/
|
22 |
public class ViewPortData implements Projected { |
23 |
/**
|
24 |
* Tipo de proyecci?n de la vista.
|
25 |
*/
|
26 |
Projection proj = null;
|
27 |
/**
|
28 |
* Amplitud de la vista, en coordenadas proyectadas.
|
29 |
*/
|
30 |
Extent extent = null;
|
31 |
/**
|
32 |
* Tama?o de la vista, en coordenadas de dispositivo.
|
33 |
*/
|
34 |
Dimension2D size = null; |
35 |
/**
|
36 |
* Transformaci?n af?n usada en la vista actual.
|
37 |
*/
|
38 |
public AffineTransform mat = null; |
39 |
/**
|
40 |
* Resoluci?n (Puntos por pulgada) de la vista actual.
|
41 |
* Se necesita para los c?lculos de escala geogr?fica.
|
42 |
*/
|
43 |
int dpi = 72; |
44 |
|
45 |
public ViewPortData(){ }
|
46 |
|
47 |
public ViewPortData(Projection proj, Extent extent, Dimension2D size) { |
48 |
this.proj = proj;
|
49 |
this.extent = extent;
|
50 |
this.size = size;
|
51 |
mat = new AffineTransform(); |
52 |
mat.scale(1.0, -1.0); |
53 |
} |
54 |
|
55 |
public Projection getProjection() { return proj; } |
56 |
public void setProjection(Projection proj) { this.proj = proj; } |
57 |
public void reProject(ReProjection rp) { |
58 |
// TODO metodo reProject pendiente de implementar
|
59 |
} |
60 |
|
61 |
public AffineTransform getMat() { return mat; } |
62 |
public void setMat(AffineTransform mat) { this.mat = mat; } |
63 |
|
64 |
public Object clone() { |
65 |
ViewPortData vp = new ViewPortData();
|
66 |
if (mat != null) |
67 |
vp.mat = new AffineTransform(mat); |
68 |
if (extent != null) |
69 |
vp.extent = new Extent(extent);
|
70 |
vp.proj = proj; |
71 |
vp.size = size; |
72 |
vp.dpi = dpi; |
73 |
return vp;
|
74 |
} |
75 |
|
76 |
public double getWidth() { return size.getWidth(); } |
77 |
public double getHeight() { return size.getHeight(); } |
78 |
/**
|
79 |
*
|
80 |
*/
|
81 |
public Dimension2D getSize() { |
82 |
return size;
|
83 |
} |
84 |
public void setSize(double w, double h) { |
85 |
setSize(new Dimension((int) w, (int) h)); |
86 |
} |
87 |
public void setSize(Dimension2D sz) { |
88 |
size = sz; |
89 |
reExtent(); |
90 |
} |
91 |
|
92 |
public Extent getExtent() { return extent; } |
93 |
public void setExtent(Dimension2D sz) { |
94 |
Point2D.Double pt0 = new Point2D.Double(0,0), |
95 |
ptSz = new Point2D.Double(sz.getWidth(), sz.getHeight()); |
96 |
try {
|
97 |
mat.inverseTransform(pt0, pt0); |
98 |
mat.inverseTransform(ptSz, ptSz); |
99 |
} catch (Exception e) { |
100 |
e.printStackTrace(); |
101 |
} |
102 |
extent = new Extent(pt0, ptSz);
|
103 |
} |
104 |
public void reExtent() { |
105 |
setExtent(size); |
106 |
} |
107 |
public void setDPI(int dpi) { this.dpi = dpi; } |
108 |
|
109 |
/**
|
110 |
* zoom a un marco.
|
111 |
*
|
112 |
* @param extent
|
113 |
*/
|
114 |
|
115 |
public void zoom(Extent extent) { |
116 |
double [] scale = extent.getScale(getWidth(), getHeight()); |
117 |
double escala = Math.min(scale[0], scale[1]); |
118 |
|
119 |
mat.setToIdentity(); |
120 |
mat.scale(escala, -escala); |
121 |
mat.translate(-extent.minX(), -extent.maxY()); |
122 |
this.extent = extent;
|
123 |
reExtent(); |
124 |
} |
125 |
|
126 |
/**
|
127 |
* zoom centrado en un punto.
|
128 |
*
|
129 |
* @param zoom
|
130 |
* @param pt
|
131 |
*/
|
132 |
|
133 |
public void zoom(double zoom, Point2D pt) { |
134 |
zoom(zoom, zoom, pt); |
135 |
} |
136 |
public void zoom(double zx, double zy, Point2D pt) { |
137 |
centerAt(pt); |
138 |
mat.scale(zx, zy); |
139 |
centerAt(pt); |
140 |
reExtent(); |
141 |
} |
142 |
|
143 |
/**
|
144 |
* Zoom a una escala (geogr?fica);
|
145 |
*
|
146 |
* @param scale
|
147 |
*/
|
148 |
|
149 |
public void zoomToGeoScale(double scale) { |
150 |
double actual = getGeoScale();
|
151 |
double f = actual/scale;
|
152 |
zoomToCenter(f); |
153 |
} |
154 |
|
155 |
/**
|
156 |
* Zoom a una escala (geogr?fica);
|
157 |
*
|
158 |
* @param scale
|
159 |
*/
|
160 |
|
161 |
public void zoomToCenter(double f) { |
162 |
Point2D.Double ptCenter = new Point2D.Double(getWidth()/2.0,getHeight()/2.0); |
163 |
try {
|
164 |
mat.inverseTransform(ptCenter, ptCenter); |
165 |
} catch (Exception e) { |
166 |
e.printStackTrace(); |
167 |
} |
168 |
zoom(f, ptCenter); |
169 |
} |
170 |
|
171 |
/**
|
172 |
* Centrar en un punto.
|
173 |
*
|
174 |
* @param pt
|
175 |
*/
|
176 |
|
177 |
public void centerAt(Point2D pt) { |
178 |
Point2D.Double ptCenter = new Point2D.Double(getWidth()/2.0,getHeight()/2.0); |
179 |
try {
|
180 |
mat.inverseTransform(ptCenter, ptCenter); |
181 |
mat.translate(ptCenter.x-pt.getX(), ptCenter.y-pt.getY()); |
182 |
} catch (Exception e) { |
183 |
e.printStackTrace(); |
184 |
} |
185 |
reExtent(); |
186 |
} |
187 |
|
188 |
/**
|
189 |
* Desplaza la vista actual.
|
190 |
*
|
191 |
* @param pt
|
192 |
*/
|
193 |
|
194 |
public void pan(Point2D ptIni, Point2D ptFin) { |
195 |
mat.translate(ptFin.getX()-ptIni.getX(), ptFin.getY()-ptIni.getY()); |
196 |
reExtent(); |
197 |
} |
198 |
|
199 |
public Point2D getCenter() { |
200 |
Point2D.Double ptCenter = new Point2D.Double(getWidth()/2.0,getHeight()/2.0); |
201 |
try {
|
202 |
mat.inverseTransform(ptCenter, ptCenter); |
203 |
} catch (Exception e) { |
204 |
e.printStackTrace(); |
205 |
} |
206 |
return ptCenter;
|
207 |
} |
208 |
|
209 |
/**
|
210 |
* Escala Geogr?fica.
|
211 |
*
|
212 |
* @param dpi resolucion en puntos por pulgada
|
213 |
*/
|
214 |
|
215 |
public double getGeoScale() { |
216 |
double scale = 0.0; |
217 |
if (proj.getClass() == UtmZone.class) { // UTM; |
218 |
scale = (extent.maxX()-extent.minX())* // metros
|
219 |
(dpi / 2.54 * 100.0)/ // px / metro |
220 |
getWidth(); // pixels
|
221 |
} else if (proj.getClass() == Geodetic.class) { // Geodetic |
222 |
scale = (extent.maxX()-extent.minX())* // grados
|
223 |
// 1852.0 metros x minuto de meridiano
|
224 |
(dpi / 2.54 * 100.0 * 1852.0 * 60.0)/ // px / metro |
225 |
getWidth(); // pixels
|
226 |
} else if (proj.getClass() == Mercator.class) { // Mercator |
227 |
Projection prj = Geodetic.getProjection(proj.getEllipsoid()); |
228 |
GeoPoint pt1 = (GeoPoint) prj.createPoint(1.0,0.0); |
229 |
GeoPoint pt2 = (GeoPoint) prj.createPoint(2.0,0.0); |
230 |
ProjPoint ppt1 = (ProjPoint) proj.createPoint(0.0, 0.0); |
231 |
ProjPoint ppt2 = (ProjPoint) proj.createPoint(0.0, 0.0); |
232 |
((Mercator) proj).fromGeo(pt1, ppt1); |
233 |
((Mercator) proj).fromGeo(pt2, ppt2); |
234 |
//scale = ppt2.getX()-ppt1.getX();
|
235 |
scale = ((extent.maxX()-extent.minX())/ (ppt2.getX()-ppt1.getX()) ) * |
236 |
//scale = ((extent.maxX()-extent.minX())/ getWidth());// *
|
237 |
(dpi / 2.54 * 100.0 * 1852.0 * 60.0) / |
238 |
getWidth(); |
239 |
} |
240 |
return scale;
|
241 |
} |
242 |
|
243 |
public String getGeoScaleAsString(String fmt) { |
244 |
DecimalFormat format = new DecimalFormat(fmt); |
245 |
return "1:"+format.format(getGeoScale()); |
246 |
} |
247 |
|
248 |
} |