root / trunk / libraries / libCq CMS for java.old / src / org / cresques / geo / ViewPortData.java @ 157
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/*
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* Created on 25-abr-2004
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*/
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package org.cresques.geo; |
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import java.awt.Dimension; |
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import java.awt.geom.AffineTransform; |
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import java.awt.geom.Dimension2D; |
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import java.awt.geom.Point2D; |
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import java.text.DecimalFormat; |
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import org.cresques.cts.ICoordTrans; |
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import org.cresques.cts.IProjection; |
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import org.cresques.px.Extent; |
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/**
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* Datos de vista sobre las capas.
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*
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* Mantiene un conjunto de datos necesarios, que describen el modo de
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* ver las capas actual.
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*
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* @author "Luis W. Sevilla" <sevilla_lui@gva.es>
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*/
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public class ViewPortData implements Projected { |
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/**
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* Tipo de proyecci?n de la vista.
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*/
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IProjection proj = null;
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/**
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* Sistema de coordenadas de la vista.
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*/
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IProjection cs = null;
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/**
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* Amplitud de la vista, en coordenadas proyectadas.
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*/
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Extent extent = null;
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/**
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* Tama?o de la vista, en coordenadas de dispositivo.
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*/
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Dimension2D size = null; |
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/**
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* Transformaci?n af?n usada en la vista actual.
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*/
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public AffineTransform mat = null; |
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/**
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* Resoluci?n (Puntos por pulgada) de la vista actual.
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* Se necesita para los c?lculos de escala geogr?fica.
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*/
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int dpi = java.awt.Toolkit.getDefaultToolkit().getScreenResolution();
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public ViewPortData(){ }
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public ViewPortData(IProjection proj, Extent extent, Dimension2D size) { |
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this.proj = proj;
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this.extent = extent;
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this.size = size;
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mat = new AffineTransform(); |
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mat.scale(1.0, -1.0); |
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} |
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public IProjection getProjection() { return proj; } |
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public void setProjection(IProjection proj) { this.proj = proj; } |
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public void reProject(ICoordTrans rp) { |
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// TODO metodo reProject pendiente de implementar
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} |
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public void setCoordSys(IProjection cs) { this.cs = cs; } |
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//public void setCoordTrans(ICoordTrans ct) { this.ct = ct; }
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public AffineTransform getMat() { return mat; } |
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public void setMat(AffineTransform mat) { this.mat = mat; } |
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public Object clone() { |
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ViewPortData vp = new ViewPortData();
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if (mat != null) |
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vp.mat = new AffineTransform(mat); |
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if (extent != null) |
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vp.extent = new Extent(extent);
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vp.proj = proj; |
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vp.size = size; |
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vp.dpi = dpi; |
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return vp;
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} |
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public double getWidth() { return size.getWidth(); } |
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public double getHeight() { return size.getHeight(); } |
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/**
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*
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*/
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public Dimension2D getSize() { |
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return size;
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} |
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public void setSize(double w, double h) { |
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setSize(new Dimension((int) w, (int) h)); |
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} |
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public void setSize(Dimension2D sz) { |
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size = sz; |
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reExtent(); |
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} |
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public Extent getExtent() { return extent; } |
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public void setExtent(Dimension2D sz) { |
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Point2D.Double pt0 = new Point2D.Double(0,0), |
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ptSz = new Point2D.Double(sz.getWidth(), sz.getHeight()); |
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try {
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mat.inverseTransform(pt0, pt0); |
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mat.inverseTransform(ptSz, ptSz); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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extent = new Extent(pt0, ptSz);
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} |
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public void reExtent() { |
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setExtent(size); |
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} |
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public void setDPI(int dpi) { this.dpi = dpi; } |
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public int getDPI() { return this.dpi; } |
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/**
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* zoom a un marco.
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*
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* @param extent
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*/
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public void zoom(Extent extent) { |
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double [] scale = extent.getScale(getWidth(), getHeight()); |
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double escala = Math.min(scale[0], scale[1]); |
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mat.setToIdentity(); |
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mat.scale(escala, -escala); |
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mat.translate(-extent.minX(), -extent.maxY()); |
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this.extent = extent;
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reExtent(); |
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} |
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/**
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* zoom centrado en un punto.
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*
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* @param zoom
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* @param pt
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*/
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public void zoom(double zoom, Point2D pt) { |
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zoom(zoom, zoom, pt); |
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} |
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public void zoom(double zx, double zy, Point2D pt) { |
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centerAt(pt); |
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mat.scale(zx, zy); |
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centerAt(pt); |
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reExtent(); |
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} |
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/**
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* Zoom a una escala (geogr?fica);
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*
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* @param scale
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*/
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public void zoomToGeoScale(double scale) { |
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double actual = getGeoScale();
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double f = actual/scale;
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zoomToCenter(f); |
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} |
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/**
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* Zoom a una escala (geogr?fica);
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*
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* @param scale
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*/
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public void zoomToCenter(double f) { |
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Point2D.Double ptCenter = new Point2D.Double(getWidth()/2.0,getHeight()/2.0); |
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try {
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mat.inverseTransform(ptCenter, ptCenter); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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zoom(f, ptCenter); |
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} |
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/**
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* Centrar en un punto.
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*
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* @param pt
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*/
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public void centerAt(Point2D pt) { |
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Point2D.Double ptCenter = new Point2D.Double(getWidth()/2.0,getHeight()/2.0); |
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try {
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mat.inverseTransform(ptCenter, ptCenter); |
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mat.translate(ptCenter.x-pt.getX(), ptCenter.y-pt.getY()); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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reExtent(); |
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} |
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/**
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* Desplaza la vista actual.
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*
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* @param pt
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*/
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public void pan(Point2D ptIni, Point2D ptFin) { |
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mat.translate(ptFin.getX()-ptIni.getX(), ptFin.getY()-ptIni.getY()); |
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reExtent(); |
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} |
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public Point2D getCenter() { |
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Point2D.Double ptCenter = new Point2D.Double(getWidth()/2.0,getHeight()/2.0); |
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try {
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mat.inverseTransform(ptCenter, ptCenter); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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return ptCenter;
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} |
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/**
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* Escala Geogr?fica.
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*
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* @param dpi resolucion en puntos por pulgada
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*/
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public double getGeoScale() { |
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// TODO Actulizarlo para Geotools2
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double scale = 0.0; |
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if (proj.getClass() == UtmZone.class) { // UTM; |
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scale = (extent.maxX()-extent.minX())* // metros
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(dpi / 2.54 * 100.0)/ // px / metro |
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getWidth(); // pixels
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} else if (proj.getClass() == Geodetic.class) { // Geodetic |
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scale = (extent.maxX()-extent.minX())* // grados
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// 1852.0 metros x minuto de meridiano
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(dpi / 2.54 * 100.0 * 1852.0 * 60.0)/ // px / metro |
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getWidth(); // pixels
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} else if (proj.getClass() == Mercator.class) { // Mercator |
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Projection prj = Geodetic.getProjection((Ellipsoid) proj.getDatum()); |
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GeoPoint pt1 = (GeoPoint) prj.createPoint(1.0,0.0); |
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GeoPoint pt2 = (GeoPoint) prj.createPoint(2.0,0.0); |
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ProjPoint ppt1 = (ProjPoint) proj.createPoint(0.0, 0.0); |
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ProjPoint ppt2 = (ProjPoint) proj.createPoint(0.0, 0.0); |
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((Mercator) proj).fromGeo(pt1, ppt1); |
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((Mercator) proj).fromGeo(pt2, ppt2); |
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//scale = ppt2.getX()-ppt1.getX();
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scale = ((extent.maxX()-extent.minX())/ (ppt2.getX()-ppt1.getX()) ) * |
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//scale = ((extent.maxX()-extent.minX())/ getWidth());// *
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(dpi / 2.54 * 100.0 * 1852.0 * 60.0) / |
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getWidth(); |
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} |
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return scale;
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} |
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public String getGeoScaleAsString(String fmt) { |
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DecimalFormat format = new DecimalFormat(fmt); |
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return "1:"+format.format(getGeoScale()); |
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} |
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} |