svn-gvsig-desktop / trunk / extensions / extRasterTools-SE / src / org / gvsig / rastertools / georeferencing / ui / zoom / CanvasZone.java @ 18277
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2007 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*/
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package org.gvsig.rastertools.georeferencing.ui.zoom; |
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import java.awt.Color; |
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import java.awt.Graphics; |
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import java.awt.Graphics2D; |
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import java.awt.event.MouseEvent; |
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import java.awt.event.MouseListener; |
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import java.awt.event.MouseMotionListener; |
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import java.awt.geom.Point2D; |
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import java.awt.geom.Rectangle2D; |
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import java.awt.image.BufferedImage; |
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import java.util.ArrayList; |
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import javax.swing.JPanel; |
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import org.gvsig.raster.util.MathUtils; |
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import org.gvsig.rastertools.georeferencing.ui.zoom.tools.BaseViewTool; |
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/**
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* Zona de dibujado del raster
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* 21/12/2007
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* @author Nacho Brodin nachobrodin@gmail.com
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*/
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public class CanvasZone extends JPanel implements MouseListener, MouseMotionListener { |
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private static final long serialVersionUID = 1308683333757367640L; |
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private BufferedImage image = null; |
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private double scale = 1; |
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private Rectangle2D extent = null; |
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private double pixelSize = 1; |
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private Point2D center = null; |
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private ArrayList graphicLayers = new ArrayList(); |
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/**
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* ?ltimo extent aplicado. Si no ha variado el siguiente a aplicar no hace falta que releamos de nuevo
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*/
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private Rectangle2D lastExtent = null; |
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//Ultimo Image con la capa dibujada y con la transformaci?n que tiene en cuenta los desplazamientos dentro de un pixel
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//Este buffer no varia hasta que se hace la siguiente petici?n de setDrawParams
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private BufferedImage lastImage = null; |
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//lastImage sobre el que se pintan las capas gr?ficas. Este buffer varia en cada repaint. El orden en el que se carga
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//es: se vuelva el lastImage, se pintan las capas gr?ficas, se pintan las tools.
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private BufferedImage lastImageWithLayers = null; |
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private boolean clear = false; |
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private Color background = Color.WHITE; |
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private BaseViewTool selectedTool = null; |
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private Point2D realCoord = new Point2D.Double(0, 0); |
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private Point2D viewCoord = new Point2D.Double(0, 0); |
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private boolean showInfo = false; |
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/**
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* Asigna los par?metros de dibujado
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* @param img Buffer con un ?rea de datos
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* @param ext Rectangle2D del ?rea de datos dada
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* @param pixelSize Tama?o de pixel
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* @param center Punto del ?rea de datos donde se quiere centrar el dibujado del buffer
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*/
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public void setDrawParams(BufferedImage img, Rectangle2D ext, double pixelSize, Point2D center) { |
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this.image = img;
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this.extent = ext;
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this.pixelSize = pixelSize;
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this.center = center;
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this.addMouseListener(this); |
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this.addMouseMotionListener(this); |
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repaint(); |
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} |
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/**
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* Asigna un nuevo centro de visualizaci?n
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* @param center
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*/
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public void setCenter(Point2D center) { |
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this.center = center;
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repaint(); |
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} |
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/**
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* Conversi?n de un punto en coordenadas del canvas a reales
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* @param p
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* @return
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*/
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public Point2D viewCoordsToWorld(Point2D p) { |
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int w = getVisibleRect().width;
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int h = getVisibleRect().height;
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Rectangle2D ex = lastExtent;
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if(lastExtent == null) |
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ex = extent; |
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double cx = ex.getX() + ((p.getX() * ex.getWidth()) / w);
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double cy = ex.getY() - (p.getY() * ex.getHeight()) / h;
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return new Point2D.Double(cx, cy); |
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} |
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/**
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* Conversi?n de un punto en coordenadas del canvas a reales
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* @param p
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* @return
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*/
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public Point2D viewCoordsFromWorld(Point2D p) { |
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int w = getVisibleRect().width;
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int h = getVisibleRect().height;
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Rectangle2D ex = lastExtent;
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if(lastExtent == null) |
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ex = extent; |
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double cx = ((p.getX() - ex.getMinX()) * w) / ex.getWidth();
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double cy = ((Math.abs(p.getY() - ex.getMinY()) * h) / ex.getHeight()); |
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return new Point2D.Double(cx, cy); |
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} |
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/**
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* Asigna un nuevo centro de visualizaci?n en coordenadas del
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* componente.
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* @param center
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*/
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public void setViewCenter(Point2D c) { |
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int w = getVisibleRect().width;
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int h = getVisibleRect().height;
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double cx = (c.getX() * lastExtent.getWidth()) / w;
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double cy = (c.getY() * lastExtent.getHeight()) / h;
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setPixelCenter(new Point2D.Double(cx, cy)); |
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} |
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/**
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* Asigna un nuevo centro de visualizaci?n en coordenadas pixel
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* del ?rea de dibujado (canvas). El nuevo centro ser? calculado en coordenadas
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* del mapa.
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* @param center
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*/
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public void setPixelCenter(Point2D c) { |
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int w = getVisibleRect().width;
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int h = getVisibleRect().height;
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//Calculamos el extent del canvas
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Rectangle2D ext = getCanvasExtent(w, h, scale);
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//Calculamos el nuevo centro en coordenadas reales
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double wWC = (c.getX() / scale) * pixelSize;
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double hWC = (c.getY() / scale) * pixelSize;
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this.center = new Point2D.Double(ext.getMinX() + wWC, |
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ext.getMinY() - hWC); |
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repaint(); |
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} |
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/**
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* Asigna un nuevo centro de visualizaci?n en coordenadas pixel. Esta llamada tiene
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* en cuenta solo p?xeles completos. No centra sobre porciones de pixel cuando el zoom es
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* mayor de 1:1. El nuevo centro es en coordenadas del mapa pero siempre centrar?
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* en la esquina inferior izquierda del pixel.
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* @param center
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*/
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public void setPixelCenter(int x, int y) { |
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int w = getVisibleRect().width;
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int h = getVisibleRect().height;
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//Calculamos el extent del canvas
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Rectangle2D ext = getCanvasExtent(w, h, scale);
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//Calculamos el nuevo centro en coordenadas reales
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double wWC = (x / scale) * pixelSize;
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double hWC = (y / scale) * pixelSize;
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Point2D center = new Point2D.Double(ext.getMinX() + wWC, |
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ext.getMinY() - hWC); |
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//Calculamos la coordena pixel a la que pertenece esa coordenada real
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int pxX = (int)((center.getX() * (w / scale)) / ext.getWidth()); |
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int pxY = (int)((center.getY() * (h / scale)) / ext.getHeight()); |
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//Despu?s de haber convertido a pixel y redondeado la coordenada a entero volvemos a convertirla en real
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double wcX = (pxX * ext.getWidth()) / (w / scale);
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double wcY = (pxY * ext.getHeight()) / (h / scale);
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this.center = new Point2D.Double(wcX, wcY); |
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repaint(); |
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} |
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/**
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* Asigna una capa gr?fica
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* @param layer IGraphicLayer
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*/
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public void setGraphicLayer(IGraphicLayer layer) { |
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graphicLayers.add(layer); |
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} |
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/**
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* Asigna la escala para el nuevo zoom
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* @param scale
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*/
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public void setZoom(double scale) { |
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this.scale = scale;
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repaint(); |
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} |
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/**
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* Obtiene la escala aplicada en el dibujado
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* @return double
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*/
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public double getZoom() { |
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return scale;
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} |
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/**
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* Obtiene el extent actual asignado al canvas
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* @return Rectangle2D
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*/
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public Rectangle2D getCanvasExtent() { |
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return lastExtent;
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} |
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/**
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* Asigna el extent del canvas
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* @param r
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*/
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public void setCanvasExtent(Rectangle2D r) { |
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this.lastExtent = r;
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} |
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/**
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* Obtiene el tama?o de pixel
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* @return double
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*/
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public double getPixelSize() { |
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return pixelSize;
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} |
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/**
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* Obtiene el centro del canvas
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* @return Point2D
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*/
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public Point2D getCenter() { |
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return center;
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} |
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/**
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* Obtiene el buffer de la vista activa y lo dibuja sobre el panel
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* con los datos de escala y desplazamiento seleccionados.
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*/
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protected void paintComponent(Graphics g) { |
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if(image == null) |
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return;
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int w = getVisibleRect().width;
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int h = getVisibleRect().height;
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Rectangle2D ext = getCanvasExtent(w, h, scale);
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if(lastImage == null || !equal(lastExtent, ext)) { |
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lastImage = new BufferedImage((int)w, (int)h, BufferedImage.TYPE_INT_RGB); |
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lastImageWithLayers = new BufferedImage((int)w, (int)h, BufferedImage.TYPE_INT_RGB); |
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} |
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if(clear) {
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g.setColor(Color.WHITE);
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g.fillRect(0, 0, w, h); |
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return;
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} |
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//Dibujamos el buffer sobre el grafics
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Graphics graphicsDB = draw(ext, w, h);
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//Dibujamos todas las capas registradas
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for (int i = 0; i < graphicLayers.size(); i++) |
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((IGraphicLayer)graphicLayers.get(i)).draw((Graphics2D)graphicsDB, ext, w, h);
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lastExtent = ext; |
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if(selectedTool != null) |
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selectedTool.draw(graphicsDB); |
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if(showInfo)
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showInfo(graphicsDB); |
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g.drawImage(lastImageWithLayers, 0, 0, this); |
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graphicsDB.dispose(); |
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} |
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/**
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* Muestra informaci?n sobre la vista
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* @param g
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*/
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private void showInfo(Graphics g) { |
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g.setColor(Color.RED);
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g.drawString("X: " + MathUtils.tailDecimals(viewCoord.getX(), 3), 12, 12); |
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g.drawString("Y: " + MathUtils.tailDecimals(viewCoord.getY(), 3), 12, 26); |
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g.drawString("X': " + MathUtils.tailDecimals(realCoord.getX(), 3), 12, 40); |
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g.drawString("Y': " + MathUtils.tailDecimals(realCoord.getY(), 3), 12, 54); |
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} |
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/**
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* Compara dos extents y devuelve true si son iguales y false si son distintos
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* @param e1 Extent 1
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* @param e2 Extent 2
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* @return true si son iguales y false si son diferentes
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*/
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private boolean equal(Rectangle2D e1, Rectangle2D e2) { |
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return (e1 != null && e2 != null && e1.getMinX() == e2.getMinX() && e1.getMinY() == e2.getMinY() |
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&& e1.getMaxX() == e2.getMaxX() && e1.getMaxY() == e2.getMaxY()); |
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} |
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/**
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* Obtiene el Extent del canvas. Este canvas tiene un ancho en pixeles
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* de w y un alto de h. Tiene en cuenta la escala a la que se quiere dibujar
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* para devolver el extent cuando el zoom ya est? aplicado.
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* @param w Ancho del canvas en p?xeles
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* @param h Alto del canvas en p?xeles
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* @return Rectangle2D
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*/
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private Rectangle2D getCanvasExtent(double w, double h, double scale) { |
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double tW = ((w / scale) / 2) * pixelSize; |
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double tH = ((h / scale) / 2) * pixelSize; |
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double minX = center.getX() - tW;
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double maxY = center.getY() + tH;
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double width = Math.abs((center.getX() + tW) - minX); |
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double height = Math.abs(maxY - (center.getY() - tH)); |
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return new Rectangle2D.Double(minX, maxY, width, height); |
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} |
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/**
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* <P>
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* Dibujado del buffer de datos sobre el Graphics.
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* </P><P>
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* No podemos aplicar un escalado al
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* Graphics y dibujar porque cuando el zoom es mayor a 1 los pixeles no empiezan a dibujarse
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* siempre en la esquina superior izquierda y al Graphics solo podemos ordenarle el dibujado
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* en coordenadas enteras. Para solucionarlo debemos copiar el trozo de buffer a dibujar teniendo
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* en cuenta el desplazamiento de la esquina superior izquierda de un pixel.
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* </P>
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* @param g
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* @param ext
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* @param w
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* @param h
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*/
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private Graphics draw(Rectangle2D ext, double w, double h) { |
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if(!equal(lastExtent, ext)) {
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//Hallamos la coordenada pixel del buffer de la esquina superior izquierda del extent
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double pxX = ((ext.getMinX() - extent.getMinX()) * (w / scale)) / ext.getWidth();
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double pxY = ((extent.getMaxY() - ext.getMinY()) * (h / scale)) / ext.getHeight();
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//Creamos el buffer y lo cargamos teniendo en cuenta el desplazamiento inicial
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double step = 1 / scale; |
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double xValue = pxX;
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double yValue = pxY;
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for (int i = 0; i < w; i++) { |
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yValue = pxY; |
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for (int j = 0; j < h; j++) { |
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if((int)xValue >= 0 && (int)yValue >= 0 && (int)xValue < image.getWidth() && (int)yValue < image.getHeight()) { |
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lastImage.setRGB(i, j, image.getRGB((int)xValue, (int)yValue)); |
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lastImageWithLayers.setRGB(i, j, image.getRGB((int)xValue, (int)yValue)); |
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} else {
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lastImage.setRGB(i, j, 0xffffffff);
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lastImageWithLayers.setRGB(i, j, 0xffffffff);
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} |
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yValue += step; |
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} |
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xValue += step; |
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} |
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} else
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((Graphics2D)lastImageWithLayers.getGraphics()).drawImage(lastImage, 0, 0, null); |
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return lastImageWithLayers.getGraphics();
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} |
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/*
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* (non-Javadoc)
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* @see java.awt.event.MouseListener#mouseClicked(java.awt.event.MouseEvent)
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*/
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public void mouseClicked(MouseEvent e) { |
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for (int i = 0; i < graphicLayers.size(); i++) |
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((IGraphicLayer)graphicLayers.get(i)).mouseClicked(e); |
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repaint(); |
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} |
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/*
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* (non-Javadoc)
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* @see java.awt.event.MouseListener#mouseEntered(java.awt.event.MouseEvent)
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*/
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public void mouseEntered(MouseEvent e) { |
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for (int i = 0; i < graphicLayers.size(); i++) |
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((IGraphicLayer)graphicLayers.get(i)).mouseEntered(e); |
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repaint(); |
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} |
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/*
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* (non-Javadoc)
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* @see java.awt.event.MouseListener#mouseExited(java.awt.event.MouseEvent)
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*/
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public void mouseExited(MouseEvent e) { |
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for (int i = 0; i < graphicLayers.size(); i++) |
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((IGraphicLayer)graphicLayers.get(i)).mouseExited(e); |
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repaint(); |
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} |
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/*
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* (non-Javadoc)
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* @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
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*/
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public void mousePressed(MouseEvent e) { |
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for (int i = 0; i < graphicLayers.size(); i++) |
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((IGraphicLayer)graphicLayers.get(i)).mousePressed(e); |
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repaint(); |
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} |
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/*
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* (non-Javadoc)
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* @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
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*/
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public void mouseReleased(MouseEvent e) { |
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for (int i = 0; i < graphicLayers.size(); i++) |
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((IGraphicLayer)graphicLayers.get(i)).mouseReleased(e); |
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repaint(); |
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} |
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/*
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* (non-Javadoc)
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* @see java.awt.event.MouseMotionListener#mouseDragged(java.awt.event.MouseEvent)
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*/
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public void mouseDragged(MouseEvent e) { |
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for (int i = 0; i < graphicLayers.size(); i++) |
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((IGraphicLayer)graphicLayers.get(i)).mouseDragged(e); |
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repaint(); |
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} |
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/*
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* (non-Javadoc)
|
| 444 |
* @see java.awt.event.MouseMotionListener#mouseMoved(java.awt.event.MouseEvent)
|
| 445 |
*/
|
| 446 |
public void mouseMoved(MouseEvent e) { |
| 447 |
realCoord = viewCoordsToWorld((Point2D)e.getPoint());
|
| 448 |
viewCoord = e.getPoint(); |
| 449 |
for (int i = 0; i < graphicLayers.size(); i++) |
| 450 |
((IGraphicLayer)graphicLayers.get(i)).mouseMoved(e); |
| 451 |
repaint(); |
| 452 |
} |
| 453 |
|
| 454 |
/**
|
| 455 |
* Asigna la tool seleccionada
|
| 456 |
* @param selectedTool
|
| 457 |
*/
|
| 458 |
public void setSelectedTool(BaseViewTool selectedTool) { |
| 459 |
this.selectedTool = selectedTool;
|
| 460 |
} |
| 461 |
|
| 462 |
/**
|
| 463 |
* Obtiene la herramienta seleccionada
|
| 464 |
* @return BaseViewTool
|
| 465 |
*/
|
| 466 |
public BaseViewTool getSelectedTool() {
|
| 467 |
return selectedTool;
|
| 468 |
} |
| 469 |
|
| 470 |
/**
|
| 471 |
* Activa o desactiva el mostrado de informaci?n
|
| 472 |
* @param showInfo
|
| 473 |
*/
|
| 474 |
public void setShowInfo(boolean showInfo) { |
| 475 |
this.showInfo = showInfo;
|
| 476 |
} |
| 477 |
} |