root / trunk / libraries / libUIComponent / src / org / gvsig / gui / beans / doubleslider / DoubleSlider.java @ 12127
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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) 2005 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.gui.beans.doubleslider; |
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import java.awt.Color; |
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import java.awt.Dimension; |
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import java.awt.Graphics; |
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import java.awt.Image; |
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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.event.MouseWheelEvent; |
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import java.awt.event.MouseWheelListener; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import javax.swing.JComponent; |
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/**
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* <code>DoubleSlider</code> representa un componente que tiene dos
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* deslizadores. Se puede definir un m?ximo y un m?nimo.
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*
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* @version 04/05/2007
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* @author Borja S?nchez Zamorano (borja.sanchez@iver.es)
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*/
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public class DoubleSlider extends JComponent implements MouseMotionListener, MouseListener, MouseWheelListener { |
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private static final long serialVersionUID = 663355422780987493L; |
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private ArrayList actionCommandListeners = new ArrayList(); |
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private Image bufferImage = null; |
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private int width = 0; |
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private int height = 0; |
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private Graphics bufferGraphics; |
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private int x1 = 0; |
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private int x2 = 100; |
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private Color color1 = Color.BLACK; |
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private Color color2 = Color.WHITE; |
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private int minimum = 0; |
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private int maximum = 100; |
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private boolean twoSliders = true; |
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private boolean bDoCallListeners = true; |
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/**
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* Crea un DoubleSlider con las opciones por defecto.
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*/
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public DoubleSlider() {
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this.setPreferredSize(new Dimension(100, 21)); |
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} |
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/**
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* Establece el m?ximo valor que puede tomar el componente
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* @param value
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*/
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public void setMaximum(int value) { |
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maximum = value; |
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validateValues(); |
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refreshImage(); |
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} |
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/**
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* Establece el m?nimo valor que puede tomar el componente
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* @param value
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*/
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public void setMinimum(int value) { |
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minimum = value; |
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validateValues(); |
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refreshImage(); |
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} |
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/*
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* (non-Javadoc)
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* @see javax.swing.JComponent#addNotify()
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*/
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public void addNotify() { |
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super.addNotify();
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addMouseMotionListener(this);
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addMouseListener(this);
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addMouseWheelListener(this);
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refreshImage(); |
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} |
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/**
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* Crea un graphics con las dimensiones del componente si no estaba creado y
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* lo devuelve para poder usarlo para dibujar en ?l.
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* @return Graphics
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*/
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private Graphics getBufferGraphics() { |
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int width2 = getBounds().width;
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int height2 = getBounds().height;
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if (width2 <= 0) |
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width2 = 1;
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if (height2 <= 0) |
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height2 = 1;
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if ((width!=width2) || (height!=height2)) {
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bufferImage = createImage(width2, height2); |
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if (bufferImage == null) return null; |
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bufferGraphics = bufferImage.getGraphics(); |
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} |
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width = width2; |
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height = height2; |
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return bufferGraphics;
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} |
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public Color getColorPosition(int pos) { |
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int r, g, b;
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Color color1 = this.color1; |
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Color color2 = this.color2; |
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if (!isEnabled()) {
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r = Color.DARK_GRAY.getRed();
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color1 = new Color(r, r, r); |
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r = Color.LIGHT_GRAY.getRed();
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r = Color.WHITE.getRed();
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color2 = new Color(r, r, r); |
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} |
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if ((width - 1) == 0) |
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return Color.BLACK; |
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if (pos < 1) |
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pos = 1;
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if (pos > (width - 1)) |
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pos = width - 1;
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r = (color1.getRed() + ((color2.getRed() - color1.getRed()) * pos) / (width - 1));
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g = (color1.getGreen() + ((color2.getGreen() - color1.getGreen()) * pos) / (width - 1));
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b = (color1.getBlue() + ((color2.getBlue() - color1.getBlue()) * pos) / (width - 1));
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return new Color(r, g, b); |
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} |
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/**
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* Redibujar el componente en el graphics temporal
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*/
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public void redrawBuffer() { |
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if (getBufferGraphics() == null) return; |
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getBufferGraphics().setColor(this.getBackground());
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getBufferGraphics().fillRect(0,0,width,height); |
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int top = (height - 11)/2; |
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top -= 6;
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for (int i=1; i<=(width-1); i++) { |
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getBufferGraphics().setColor(getColorPosition(i)); |
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getBufferGraphics().drawLine(i,top,i,top+10);
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} |
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if (!isEnabled())
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getBufferGraphics().setColor(Color.LIGHT_GRAY);
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else
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getBufferGraphics().setColor(Color.BLACK);
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getBufferGraphics().drawRect(1, top, width - 2, 10); |
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drawTriangle(valuetopixel(x1), top, getColorPosition(valuetopixel(x1))); |
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if (twoSliders)
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drawTriangle(valuetopixel(x2), top, getColorPosition(valuetopixel(x2))); |
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} |
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/**
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* Dibujar un triangulo, un triangulo es un deslizador del componente. Puedes
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* indicarle que color tendra y en que posici?n estar?.
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* @param x
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* @param color
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*/
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private void drawTriangle(int x, int y, Color color) { |
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if (isEnabled()) {
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getBufferGraphics().setColor(color); |
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getBufferGraphics().drawLine(x, y + 12, x, y + 16); |
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getBufferGraphics().drawLine(x-1, y + 14, x-1, y + 16); |
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getBufferGraphics().drawLine(x+1, y + 14, x+1, y + 16); |
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getBufferGraphics().drawLine(x-2, y + 16, x-2, y + 16); |
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getBufferGraphics().drawLine(x+2, y + 16, x+2, y + 16); |
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} |
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if (isEnabled()) {
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getBufferGraphics().setColor(Color.BLACK);
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} else {
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getBufferGraphics().setColor(Color.GRAY);
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} |
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getBufferGraphics().drawLine(x, y + 10, x-3, y + 17); |
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getBufferGraphics().drawLine(x, y + 10, x+3, y + 17); |
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getBufferGraphics().drawLine(x-3, y + 17, x+3, y + 17); |
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} |
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/**
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* Redibujar el componente en el graphics temporal y representarlo en el
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* componente
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*/
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public void refreshImage() { |
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redrawBuffer(); |
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if (bufferImage != null) |
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getGraphics().drawImage(bufferImage, 0, 0, this); |
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super.paint(getGraphics());
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} |
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/**
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* Convierte un valor a la coordenada pixel correspondiente
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* @param value
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* @return
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*/
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private int valuetopixel(int value) { |
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return ((value-minimum)*(width-3)/(maximum-minimum)) + 1; |
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} |
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/**
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* Convierte un pixel al valor que deber?a tener
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* @param value
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* @return
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*/
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private int pixeltovalue(int value) { |
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return (((value-1)*(maximum-minimum))/(width-3))+minimum; |
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} |
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/*
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* (non-Javadoc)
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* @see javax.swing.JComponent#paint(java.awt.Graphics)
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*/
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public void paint(Graphics g) { |
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redrawBuffer(); |
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g.drawImage(bufferImage, 0, 0, this); |
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super.paint(g);
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} |
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int valuePressed = 0; |
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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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if (!isEnabled())
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return;
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if (e.getButton() != MouseEvent.BUTTON1) return; |
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int aux = pixeltovalue(e.getX()+1); |
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int aux2 = aux - x1;
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int aux3 = x2 - aux;
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if (aux3 < aux2)
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valuePressed = 2;
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else
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valuePressed = 1;
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if (!twoSliders)
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valuePressed = 1;
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changeValue(e.getX()); |
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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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valuePressed = 0;
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} |
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/**
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* Establecer los l?mites de los valores en caso de que sean incorrectos
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*/
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private void validateValues() { |
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if (x1 < minimum) x1 = minimum;
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if (x1 > maximum) x1 = maximum;
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if (twoSliders) {
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if (x2 < minimum) x2 = minimum;
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if (x2 > maximum) x2 = maximum;
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} |
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} |
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/**
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* Establecer el valor del extremo izquierdo del slider
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* @param value
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*/
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public void setX1(int value) { |
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x1 = value; |
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if (twoSliders)
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if (x1 > x2)
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x2 = x1; |
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validateValues(); |
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refreshImage(); |
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} |
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/**
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* Es lo mismo que setX1()
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* @param value
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*/
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public void setValue(int value) { |
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setX1(value); |
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} |
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/**
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* Establecer el valor del extremo derecho del slider
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* @param value
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*/
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public void setX2(int value) { |
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x2 = value; |
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if (x2 < x1) x1 = x2;
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validateValues(); |
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refreshImage(); |
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} |
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/**
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* Obtener el valor del extremo izquierdo del componente
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* @return
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*/
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public int getX1() { |
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return x1;
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} |
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/**
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* Devuelve lo mismo que getX1()
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* @return
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*/
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public int getValue() { |
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return getX1();
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} |
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/**
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* Obtener el valor del extremo derecho del componente
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* @return
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*/
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public int getX2() { |
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return x2;
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} |
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/**
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* M?todo usado por los eventos del rat?n para establecer una nueva posici?n
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* del slider
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* @param pos
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*/
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private void changeValue(int pos) { |
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if (!isEnabled())
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return;
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if (valuePressed == 0) return; |
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int aux = pixeltovalue(pos + 1); |
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if (valuePressed == 1) setX1(aux); |
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if (valuePressed == 2) setX2(aux); |
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callValueChangedListeners(); |
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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 arg0) { |
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if (!isEnabled())
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return;
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changeValue(arg0.getX()); |
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} |
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/*
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* (non-Javadoc)
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* @see java.awt.event.MouseMotionListener#mouseMoved(java.awt.event.MouseEvent)
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*/
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public void mouseMoved(MouseEvent e) { |
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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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} |
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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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} |
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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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} |
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/**
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* A?adir un listener a la lista de eventos
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* @param listener
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*/
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public void addValueChangedListener(DoubleSliderListener listener) { |
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if (!actionCommandListeners.contains(listener))
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actionCommandListeners.add(listener); |
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} |
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/**
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* Borrar un listener de la lista de eventos
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* @param listener
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*/
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public void removeValueChangedListener(DoubleSliderListener listener) { |
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actionCommandListeners.remove(listener); |
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} |
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/**
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* Invocar a los eventos asociados al componente
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*/
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private void callValueChangedListeners() { |
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if (!bDoCallListeners)
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return;
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Iterator acIterator = actionCommandListeners.iterator();
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while (acIterator.hasNext()) {
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DoubleSliderListener listener = (DoubleSliderListener) acIterator.next(); |
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listener.actionValueChanged(new DoubleSliderEvent(this)); |
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} |
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} |
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/**
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* @return the twoSliders
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*/
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public boolean isTwoSliders() { |
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return twoSliders;
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} |
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/**
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* @param twoSliders the twoSliders to set
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*/
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public void setTwoSliders(boolean twoSliders) { |
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this.twoSliders = twoSliders;
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refreshImage(); |
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} |
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/**
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* @param color1 the color1 to set
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*/
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public void setColor1(Color color1) { |
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this.color1 = color1;
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refreshImage(); |
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} |
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/**
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* @param color2 the color2 to set
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*/
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public void setColor2(Color color2) { |
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this.color2 = color2;
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refreshImage(); |
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} |
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/* (non-Javadoc)
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* @see javax.swing.JComponent#setEnabled(boolean)
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*/
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public void setEnabled(boolean enabled) { |
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super.setEnabled(enabled);
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refreshImage(); |
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} |
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public void mouseWheelMoved(MouseWheelEvent e) { |
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if (!isEnabled())
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return;
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int aux = pixeltovalue(e.getX()+1); |
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int aux2 = aux - x1;
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int aux3 = x2 - aux;
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if (aux3 < aux2)
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valuePressed = 2;
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else
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valuePressed = 1;
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if (!twoSliders)
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valuePressed = 1;
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if (valuePressed == 1) |
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setX1(getX1() - e.getWheelRotation()); |
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else
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setX2(getX2() - e.getWheelRotation()); |
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valuePressed = 0;
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callValueChangedListeners(); |
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} |
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} |