root / trunk / extensions / extRasterTools-SE / src / org / gvsig / raster / beans / canvas / layers / functions / LogaritmicExponentialLine.java @ 19969
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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.functions; |
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import java.awt.Color; |
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import java.awt.Cursor; |
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import java.awt.event.MouseEvent; |
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import java.util.ArrayList; |
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import org.gvsig.raster.beans.canvas.layers.InfoLayer; |
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import org.gvsig.raster.util.MathUtils; |
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import org.gvsig.raster.util.RasterToolsUtil; |
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/**
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* Representa una funcion con posibilidad de arrastre para las funciones
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* logaritmicas y exponenciales. Con el raton se puede pasar de una a otra
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* directamente.
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*
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* Las formas mas logicas de uso seria pasandole:
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* 1.0: Para una funcion logaritmica
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* -1.0: Para una funcion exponencial
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* 0.0: Para una funcion lineal
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*
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* @version 02/04/2008
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* @author BorSanZa - Borja S?nchez Zamorano (borja.sanchez@iver.es)
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*/
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public class LogaritmicExponentialLine extends StraightLine { |
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/**
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* Numero de puntos que contiene esta funci?n
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*/
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private double num = 40.0; |
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/**
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* Base de la exponencial
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*/
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private double baseExp = 6.0; |
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private double perc = 1.0; |
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/**
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* Constructor. Asigna el color y establece la posicion de la funcion.
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* Los valores normales son 1.0 para logaritmica y -1.0 para exponencial.
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* El rango va desde -2.0 hasta 2.0. Siendo 0.0 una funcion lineal.
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* @param c
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*/
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public LogaritmicExponentialLine(Color c, double point) { |
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super(c);
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setShowSquares(false);
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perc = point; |
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recalcList(); |
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} |
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/**
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* Actualiza la barra informativa para saber en que estado se encuentra el
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* componente.
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* Cuando el porcentaje es mayor a 0 siempre estamos en la Logaritmica
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* Cuando el porcentaje es menor a 0 siempre estamos en la exponencial
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* @param perc
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*/
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private void setInfoPoint(Double perc) { |
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if (canvas != null) { |
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ArrayList list = canvas.getDrawableElements(InfoLayer.class);
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if (list.size() > 0) { |
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InfoLayer infoLayer = (InfoLayer) list.get(0);
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if (perc == null) { |
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infoLayer.setStatusLeft(null);
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infoLayer.setStatusRight(null);
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canvas.repaint(); |
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return;
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} |
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if (perc.doubleValue() > 0.0) |
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infoLayer.setStatusLeft(RasterToolsUtil.getText(this, "logarithmical")); |
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else
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infoLayer.setStatusLeft(RasterToolsUtil.getText(this, "exponential")); |
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infoLayer.setStatusRight(MathUtils.clipDecimals(Math.abs(perc.doubleValue()*100.0), 2) + "%"); |
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} |
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} |
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} |
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/**
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* Recalcula todos los puntos de la funcion
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* ( 0.0 a 1.0) - Funcion logaritmica con aproximacion al centro
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* ( 1.0 a 2.0) - Funcion logaritmica con aproximacion al borde
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* ( 0.0 a -1.0) - Funcion exponencial con aproximacion al centro
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* (-1.0 a -2.0) - Funcion exponencial con aproximacion al borde
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*/
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private void recalcList() { |
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double x, y = 0.0; |
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setInfoPoint(new Double(perc)); |
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this.listSquare.clear();
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for (int i = 0; i <= num; i++) { |
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x = ((double) i) / num;
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// Aproximacion al centro de una funcion logaritmica
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if (perc >= 0.0 && perc <= 1.0) { |
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y = logFunction(x); |
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y = x + ((y - x) * perc); |
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} |
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// Aproximacion al borde de una funcion logaritmica
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if (perc > 1.0 && perc <= 2.0) { |
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y = logFunction(x); |
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y = y + ((1.0 - y) * (perc - 1.0)); |
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} |
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// Aproximacion al centro de una funcion exponencial
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if (perc >= -1.0 && perc < 0.0) { |
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y = expFunction(x); |
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y = x - ((x - y) * Math.abs(perc));
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} |
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// Aproximacion al borde de una funcion exponencial
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if (perc >= -2.0 && perc < -1.0) { |
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y = expFunction(x); |
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y = y * (1.0 - (Math.abs(perc) - 1.0)); |
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} |
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if (y < 0.0) |
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y = 0.0;
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if (y > 1.0) |
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y = 1.0;
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this.listSquare.add(new Square(x, y)); |
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} |
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} |
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/**
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* Formula para calcular el valor en y de una funcion logaritmica en x
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* @param x
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* @return
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*/
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private double logFunction(double x) { |
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return Math.log10(1.0 + (x * 99.0)) / 2.0; |
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} |
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/**
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* Formula para calcular el valor en y de una funcion exponencial en x
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* @param x
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* @return
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*/
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private double expFunction(double x) { |
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return (Math.exp(x * baseExp) - 1.0) / (Math.exp(baseExp) - 1.0); |
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} |
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/* (non-Javadoc)
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* @see org.gvsig.raster.beans.canvas.layers.functions.StraightLine#mouseDragged(java.awt.event.MouseEvent)
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*/
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public boolean mouseDragged(MouseEvent e) { |
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if (canvas.getCursor().getType() != Cursor.DEFAULT_CURSOR) |
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return true; |
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double x = pixelToValueX(e.getX());
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double y = pixelToValueY(e.getY());
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double y2 = 0.0; |
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// Localizamos el punto del raton para pasar un porcentaje correcto y que
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// asi coincida la funcion con el raton
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if (y >= x) {
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y2 = logFunction(x); |
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if (y < y2)
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perc = (y - x) / (y2 - x); |
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else
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perc = ((y - y2) / (1.0 - y2)) + 1.0; |
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} else {
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y2 = expFunction(x); |
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if (y > y2)
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perc = -Math.abs((y - x) / (y2 - x));
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else
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perc = -Math.abs((y2 - y) / y2) - 1.0; |
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} |
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if (perc > 2.0) |
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perc = 2.0;
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if (perc < -2.0) |
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perc = -2.0;
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recalcList(); |
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canvas.repaint(); |
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canvas.callDataDragged("line", this); |
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return false; |
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} |
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/* (non-Javadoc)
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* @see org.gvsig.raster.beans.canvas.layers.functions.StraightLine#mouseMoved(java.awt.event.MouseEvent)
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*/
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public boolean mouseMoved(MouseEvent e) { |
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return true; |
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} |
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/* (non-Javadoc)
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* @see org.gvsig.raster.beans.canvas.layers.functions.StraightLine#mousePressed(java.awt.event.MouseEvent)
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*/
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public boolean mousePressed(MouseEvent e) { |
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return mouseDragged(e);
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} |
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/* (non-Javadoc)
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* @see org.gvsig.raster.beans.canvas.layers.functions.StraightLine#mouseReleased(java.awt.event.MouseEvent)
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*/
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public boolean mouseReleased(MouseEvent e) { |
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setInfoPoint(null);
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return true; |
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} |
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/**
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* Devuelve si esta usando la funcion logaritmica
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* @return
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*/
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public boolean isLogaritmical() { |
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return (perc > 0.0); |
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} |
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/**
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* Devuelve si esta usando la funcion exponencial
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* @return
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*/
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public boolean isExponencial() { |
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return (perc < 0.0); |
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} |
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} |