svn-gvsig-desktop / trunk / extensions / extRasterTools-SE / src / org / gvsig / raster / beans / canvas / layers / StraightLine.java @ 19361
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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.Image; |
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import java.awt.Point; |
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import java.awt.Toolkit; |
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import java.awt.event.MouseEvent; |
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import java.awt.image.MemoryImageSource; |
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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 double x = 0.0D; |
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private double y = 0.0D; |
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private int width = 6; |
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private Color color = Color.WHITE; |
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private int border = 2; |
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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(double x, double y) { |
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setPosition(x, y); |
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} |
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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(int x, int y) { |
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setPosition(x, y); |
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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(double x, double y) { |
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this.x = x;
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this.y = y;
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if (this.x > 1.0D) this.x = 1.0D; |
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if (this.x < 0.0D) this.x = 0.0D; |
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if (this.y > 1.0D) this.y = 1.0D; |
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if (this.y < 0.0D) this.y = 0.0D; |
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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(int x, int y) { |
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setPosition(pixelToValueX(x), pixelToValueY(y)); |
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} |
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public int getPixelX() { |
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return valueToPixelX(x);
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} |
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public int getPixelY() { |
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return valueToPixelY(y);
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} |
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public double getX() { |
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return x;
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} |
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public double getY() { |
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return y;
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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) valueToPixelX(x) - (width >> 1), (int) valueToPixelY(y) - (width >> 1), (int) width, (int)width); |
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} |
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/**
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* Dibuja el cursor del raton
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* @param g
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*/
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protected void paintCursor(Graphics g) { |
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g.setColor(Color.white);
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g.drawLine(valueToPixelX(x) - 6, valueToPixelY(y), valueToPixelX(x) + 6, valueToPixelY(y)); |
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g.drawLine(valueToPixelX(x), valueToPixelY(y) - 6, valueToPixelX(x), valueToPixelY(y) + 6); |
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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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if (p.getX() < (valueToPixelX(x) - (width >> 1))) |
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return false; |
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if (p.getX() > (valueToPixelX(x) + (width >> 1))) |
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return false; |
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if (p.getY() < (valueToPixelY(y) - (width >> 1))) |
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return false; |
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if (p.getY() > (valueToPixelY(y) + (width >> 1))) |
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return false; |
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return true; |
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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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private int valueToPixelX(double value) { |
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return (int) Math.round(canvas.getCanvasMinX() + border + ((canvas.getCanvasMaxX() - canvas.getCanvasMinX() - (border * 2)) * value)); |
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} |
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private double pixelToValueX(int pixel) { |
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return ((double) (pixel - canvas.getCanvasMinX() - border) / (double) (canvas.getCanvasMaxX() - canvas.getCanvasMinX() - (border * 2))); |
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} |
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private int valueToPixelY(double value) { |
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value = 1.0D - value;
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return (int) Math.round(canvas.getCanvasMinY() + border + ((canvas.getCanvasMaxY() - canvas.getCanvasMinY() - (border * 2)) * value)); |
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} |
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private double pixelToValueY(int pixel) { |
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return (1.0D - ((double) (pixel - canvas.getCanvasMinY() - border) / (double) (canvas.getCanvasMaxY() - canvas.getCanvasMinY() - (border * 2)))); |
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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 listSquare = new ArrayList(); |
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private int pointDragged = -1; |
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Cursor transparentCursor = null; |
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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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int[] pixels = new int[16 * 16]; |
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Image image = Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(16, 16, pixels, 0, 16)); |
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transparentCursor = Toolkit.getDefaultToolkit().createCustomCursor(image, new Point(0, 0), "invisibleCursor"); |
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setColor(c); |
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listSquare.add(new Square(0.0D, 0.0D)); |
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listSquare.add(new Square(1.0D, 1.0D)); |
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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#firstDrawActions()
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*/
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public void firstDrawActions() { |
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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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Square square = null;
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Square lastSquare = null;
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for (int i = 0; i < listSquare.size(); i++) { |
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lastSquare = square; |
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square = ((Square) listSquare.get(i)); |
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if (lastSquare != null) |
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g.drawLine(lastSquare.getPixelX(), lastSquare.getPixelY(), square.getPixelX(), square.getPixelY()); |
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} |
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// Dibujamos los cuadrados de los puntos
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for (int i = 0; i < listSquare.size(); i++) { |
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square = ((Square) listSquare.get(i)); |
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square.setColor(color); |
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if (pointDragged != i)
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square.paint(g); |
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else
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square.paintCursor(g); |
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} |
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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 < (listSquare.size() - 1); i++) { |
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double sqX = ((Square) listSquare.get(i)).getX();
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double sqNextX = ((Square) listSquare.get(i + 1)).getX(); |
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if (element.getX() >= sqX && element.getX() <= sqNextX) {
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listSquare.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 < listSquare.size(); i++) { |
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if (((Square) listSquare.get(i)).isInside(e.getPoint())) {
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if ((e.getModifiersEx() & MouseEvent.BUTTON3_DOWN_MASK) != 0) { |
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if ((i == 0) || ((i + 1) == listSquare.size())) |
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continue;
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pointDragged = -1;
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listSquare.remove(i); |
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canvas.repaint(); |
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return false; |
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} |
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if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) != 0) { |
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pointDragged = i; |
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this.mouseDragged(e);
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return false; |
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} |
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} |
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} |
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if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) == 0) |
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return true; |
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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.getX(), e.getY()));
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this.mouseDragged(e);
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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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canvas.repaint(); |
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canvas.callDataChanged("line", this); |
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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(transparentCursor); |
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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) listSquare.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(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 == (listSquare.size() - 1)) { |
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point.setPosition(maxX, y); |
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return false; |
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} |
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// Puntos centrales
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point.setPosition(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) listSquare.get(i)); |
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if (lowPoint.getPixelX() >= x) {
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lowPoint.setPosition(x, lowPoint.getPixelY()); |
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for (int j = i + 1; listSquare.get(j) != point;) { |
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listSquare.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 = listSquare.size() - 1; i > pointDragged; i--) { |
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Square upperPoint = ((Square) listSquare.get(i)); |
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if (upperPoint.getPixelX() <= x) {
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upperPoint.setPosition(x, upperPoint.getPixelY()); |
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for (int j = i - 1; listSquare.get(j) != point;) { |
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listSquare.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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canvas.callDataDragged("line", this); |
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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 < listSquare.size(); i++) { |
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if (((Square)listSquare.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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} |