svn-gvsig-desktop / trunk / extensions / extRasterTools-SE / src / org / gvsig / raster / beans / canvas / layers / StraightLine.java @ 19319
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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.raster.beans.canvas.layers; |
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import java.awt.Color; |
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import java.awt.Cursor; |
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import java.awt.Graphics; |
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import java.awt.Point; |
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import java.awt.event.MouseEvent; |
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import java.awt.geom.Point2D; |
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import java.util.ArrayList; |
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import org.gvsig.raster.beans.canvas.DrawableElement; |
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import org.gvsig.raster.beans.canvas.GCanvas; |
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/**
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* Representa una linea recta con puntos de arrastre para la ecualizaci?n de
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* un histograma y realce lineales y dencity slicing.
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*
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* 14-oct-2007
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class StraightLine extends DrawableElement { |
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/**
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* Representa un punto seleccionado sobre el canvas. Este es
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* dibujado como un peque?o cuadrado.
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*
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* 14-oct-2007
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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class Square { |
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private Point2D ul, lr; |
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private Point2D center = null; |
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private int width = 6; |
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private Color color = Color.WHITE; |
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/**
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* Constructor. Calcula las esquinas del cuadrado
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* @param p
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*/
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public Square(Point p) { |
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init(p); |
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} |
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private void init(Point p) { |
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ul = new Point2D.Double(p.getX() - (width >> 1), p.getY() - (width >> 1)); |
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lr = new Point2D.Double(p.getX() + (width >> 1), p.getY() + (width >> 1)); |
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center = new Point2D.Double(p.getX(), p.getY()); |
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} |
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/**
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* Asigna una nueva posici?n al punto
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* @param x
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*/
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public void setPosition(Point p) { |
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init(p); |
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} |
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/**
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* Obtiene el punto central del cuadro
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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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* Dibuja el cuadrado
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* @param g
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*/
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protected void paint(Graphics g) { |
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g.setColor(color); |
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g.drawRect((int)ul.getX(), (int)ul.getY(), (int)width, (int)width); |
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} |
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/**
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* Informa de si el punto pasado por par?metro cae dentro del cuadro o no
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* @param p Punto a comprobar
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* @return true si el punto est? dentro y false si no lo est?
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*/
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public boolean isInside(Point p) { |
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return (p.getX() >= ul.getX() && p.getX() <= lr.getX() && p.getY() >= ul.getY() && p.getY() <= lr.getY());
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} |
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/**
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* Asigna el color del cuadrado
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* @param c Color
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*/
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public void setColor(Color c) { |
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this.color = c;
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} |
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} |
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/**
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* Lista de cuadrados que intersectan con la recta
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*/
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private ArrayList square = new ArrayList(); |
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private int pointDragged = -1; |
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/**
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* Constructor. Asigna el color
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* @param c
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*/
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public StraightLine(Color c) { |
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setColor(c); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.canvas.DrawableElement#firstDraw()
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*/
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public void firstDrawActions() { |
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//El primer dibujado asigna valores a los puntos inicial y final.
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//No puede hacerse fuera del paint porque a?n no tiene los datos.
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square.clear(); |
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Point beginPoint = new Point(canvas.getCanvasMinX(), canvas.getCanvasMaxY()); |
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square.add(new Square(beginPoint));
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Point endPoint = new Point(canvas.getCanvasMaxX(), canvas.getCanvasMinY()); |
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square.add(new Square(endPoint));
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} |
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/**
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* Dibujado de las l?neas y cuadros sobre el canvas
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*/
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public void paint(Graphics g) { |
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g.setColor(color); |
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//Dibujamos una l?nea desde un punto hasta el siguiente
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for (int i = 0; i < (square.size() - 1); i++) { |
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Square sq = ((Square)square.get(i)); |
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Square sqNext = ((Square)square.get(i + 1));
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g.drawLine((int)sq.getCenter().getX(), (int)sq.getCenter().getY(), (int)sqNext.getCenter().getX(), (int)sqNext.getCenter().getY()); |
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sq.setColor(color); |
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sq.paint(g); |
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} |
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//Dibujamos el ?ltimo tramo de recta
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if(square.size() != 0) |
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((Square)square.get(square.size() - 1)).paint(g);
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} |
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/**
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* Asigna el objeto JComponent donde se pintan los elementos. Inicializa los puntos
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* de inicio y fin de l?nea y asigna los listener
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* @param canvas
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*/
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public void setCanvas(GCanvas canvas) { |
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super.setCanvas(canvas);
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} |
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/**
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* Inserta un elemento (cuadrado) en el array entre los dos cuadrados entre los que se
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* encuentre el valor de su X, as? siempre est?n ordenados en el array por valor de X.
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* @param element
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* @return Devuelve la posici?n del elemento insertado, en caso de no poder insertarse
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* devolver? -1
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*/
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private int insert(Square element) { |
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for (int i = 0; i < (square.size() - 1); i++) { |
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int sqX = (int)((Square)square.get(i)).getCenter().getX(); |
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int sqNextX = (int)((Square)square.get(i + 1)).getCenter().getX(); |
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if(element.getCenter().getX() >= sqX && element.getCenter().getX() <= sqNextX) {
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square.add(i + 1, element);
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return i + 1; |
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} |
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} |
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return -1; |
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} |
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/**
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* Se captura el punto a arrastrar, en caso de que no coincida con un punto,
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* se inserta
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*/
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public boolean mousePressed(MouseEvent e) { |
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for (int i = 0; i < square.size(); i++) { |
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if (((Square)square.get(i)).isInside(e.getPoint())) {
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pointDragged = i; |
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canvas.setCursor(new Cursor(Cursor.MOVE_CURSOR)); |
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return false; |
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} |
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} |
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// En caso de que nadie lo este tratando, osea, un cursor normal
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if (canvas.getCursor().getType() == Cursor.DEFAULT_CURSOR) { |
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pointDragged = insert(new Square(e.getPoint()));
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canvas.repaint(); |
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canvas.setCursor(new Cursor(Cursor.MOVE_CURSOR)); |
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return false; |
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} |
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return true; |
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} |
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/**
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* Inicializamos el punto arrastrado a un valor fuera del array
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*/
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public boolean mouseReleased(MouseEvent e) { |
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pointDragged = -1;
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return true; |
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} |
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/**
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* Cuando se ha pinchado un punto y se arrastra se define aqu? su comportamiento.
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*/
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public boolean mouseDragged(MouseEvent e) { |
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if (pointDragged >= 0) { |
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canvas.setCursor(new Cursor(Cursor.MOVE_CURSOR)); |
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int minX = canvas.getCanvasMinX();
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int minY = canvas.getCanvasMinY();
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int maxX = canvas.getCanvasMaxX();
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int maxY = canvas.getCanvasMaxY();
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//Controlamos que no se salga de los l?mites
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int x = Math.min(Math.max(e.getX(), minX), maxX); |
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int y = Math.min(Math.max(e.getY(), minY), maxY); |
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Square point = ((Square)square.get(pointDragged)); |
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try {
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//El primer punto no se desplaza en X
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if (pointDragged == 0) { |
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point.setPosition(new Point(minX, y)); |
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return false; |
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} |
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//El ?ltimo punto no se desplaza en X
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if (pointDragged == (square.size() - 1)) { |
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point.setPosition(new Point(maxX, y)); |
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return false; |
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} |
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//Puntos centrales
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point.setPosition(new Point(x, y)); |
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//Arrastra a los de abajo si la X es menor que los inferiores
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for (int i = 0; i < pointDragged; i++) { |
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Square lowPoint = ((Square)square.get(i)); |
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if(lowPoint.getCenter().getX() >= x) {
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lowPoint.setPosition(new Point(x, (int)lowPoint.getCenter().getY())); |
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for (int j = i + 1; square.get(j) != point;) { |
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square.remove(j); |
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pointDragged --; |
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} |
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break;
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} |
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} |
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//Arrastra a los de arriba si la X es mayor que los superiores
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for (int i = square.size() - 1; i > pointDragged; i--) { |
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Square upperPoint = ((Square)square.get(i)); |
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if(upperPoint.getCenter().getX() <= x) {
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upperPoint.setPosition(new Point(x, (int)upperPoint.getCenter().getY())); |
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for (int j = i - 1; square.get(j) != point; ) { |
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square.remove(j); |
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j --; |
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} |
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break;
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} |
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} |
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} finally {
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// Siempre repintamos
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canvas.repaint(); |
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} |
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return false; |
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} |
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return true; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.beans.canvas.DrawableElement#mouseMoved(java.awt.event.MouseEvent)
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*/
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public boolean mouseMoved(MouseEvent e) { |
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for (int i = 0; i < square.size(); i++) { |
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if (((Square)square.get(i)).isInside(e.getPoint())) {
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canvas.setCursor(new Cursor(Cursor.MOVE_CURSOR)); |
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return false; |
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} |
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} |
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return true; |
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} |
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} |