root / trunk / libraries / libUIComponent / src / org / gvsig / gui / beans / imagenavigator / ImageNavigator.java @ 12438
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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.imagenavigator; |
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import java.awt.AlphaComposite; |
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import java.awt.Color; |
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import java.awt.Cursor; |
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import java.awt.GradientPaint; |
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import java.awt.Graphics; |
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import java.awt.Graphics2D; |
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import java.awt.Image; |
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import java.awt.Point; |
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import java.awt.RenderingHints; |
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import java.awt.event.KeyEvent; |
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import java.awt.event.KeyListener; |
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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 javax.swing.ImageIcon; |
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import javax.swing.JComponent; |
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/**
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* <code>ImageNavigator</code> es un componente que representa un manejador
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* de im?genes. En ?l se puede desplazar, hacer un zoom out o un zoom in a una
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* imagen virtual. El componente no trata la imagen en si, solo lanza los
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* eventos indicando la nueva posici?n y zoom de la imagen, luego es el usuario
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* el que se encargar? de dibujar esa imagen en la posici?n correspondiente.
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*
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* El modo de uso es el siguiente:
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* - Se puede desplazar una imagen con el bot?n izquierdo del rat?n.
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* - Se puede hacer zoom in/out con las teclas +/- del teclado.
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* - Se puede hacer zoom in/out con la rueda del rat?n teniendo en cuenta la
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* posici?n del mismo.
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* - Se puede resetear los valores con las teclas 'Espacio' o 0;
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* - Las teclas 1, 2, 3, 4 y 5 equivalen a zoom 1, 2, 4, 8 y 16 respectivamente.
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* - La tecla C sirve para centrar la imagen.
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* - La tecla H muestra la ayuda.
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*
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* @version 04/05/2007
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* @author BorSanZa - Borja S?nchez Zamorano (borja.sanchez@iver.es)
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*/
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public class ImageNavigator extends JComponent implements KeyListener, MouseMotionListener, MouseListener, MouseWheelListener { |
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private static final long serialVersionUID = 1164788214432359272L; |
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private IClientImageNavigator iClient = null; |
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private Image image = null; |
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private Graphics2D widgetGraphics = null; |
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private Image imageCache = null; |
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private Graphics2D cacheGraphics = null; |
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private double zoom = 1.0; |
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private double x1 = 0.0; |
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private double y1 = 0.0; |
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private boolean yInverted = false; |
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private boolean xInverted = false; |
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private int width = 0; |
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private int height = 0; |
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private boolean showHelp = false; |
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ImageIcon imageIconClose;
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ImageIcon imageIconHelp;
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/**
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* Crea un <code>ImageNavigator</code> especificandole quien pintara el
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* componente
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* @param iClient
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*/
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public ImageNavigator(IClientImageNavigator iClient) {
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this.iClient = iClient;
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this.setFocusable(true); |
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this.addKeyListener(this); |
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this.addMouseMotionListener(this); |
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this.addMouseListener(this); |
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this.addMouseWheelListener(this); |
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} |
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double initX1 = 0.0; |
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double initY1 = 0.0; |
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double initX2 = 100.0; |
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double initY2 = 100.0; |
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double initZoom = 1.0; |
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boolean autoAdjusted = true; |
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/**
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* Actualiza las dimensiones para ajustar la imagen a los bordes especificados
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* con setViewDimensions.
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*/
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private void updateDimensions() { |
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double factor = this.getWidth() / (initX2 - initX1); |
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if (factor > (this.getHeight() / (initY2 - initY1))) |
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factor = this.getHeight() / (initY2 - initY1);
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zoom = factor; |
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imageCenter(); |
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} |
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/**
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* Centra la imagen
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*/
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public void imageCenter() { |
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x1 = initX1; |
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y1 = initY1; |
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if (isXInverted())
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x1 -= ((initX2 - initX1) - this.getWidth() / zoom) / 2.0; |
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else
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x1 += ((initX2 - initX1) - this.getWidth() / zoom) / 2.0; |
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if (isYInverted())
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y1 -= ((initY2 - initY1) - this.getHeight() / zoom) / 2.0; |
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else
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y1 += ((initY2 - initY1) - this.getHeight() / zoom) / 2.0; |
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} |
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/**
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* Especifica el rectangulo de la imagen a visualizar, pudiendo tener
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* cualquiera de los ejes X e Y invertidos
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*
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* @param x1 Coordenada izquierda
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* @param y1 Coordenada superior
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* @param x2 Coordenada derecha
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* @param y2 Coordenada inferior
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*/
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public void setViewDimensions(double x1, double y1, double x2, double y2) { |
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this.initX1 = x1;
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this.initX2 = x2;
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this.initY1 = y1;
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this.initY2 = y2;
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yInverted = (y2 < y1); |
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if (yInverted) {
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this.initY1 = y2;
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this.initY2 = y1;
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} |
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xInverted = (x2 < x1); |
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if (xInverted) {
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this.initX1 = x2;
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this.initX2 = x1;
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} |
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this.updateDimensions();
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} |
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/**
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* Hace un forzado de pintado del buffer temporal de la imagen. Este m?todo
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* forzar? una llamada a la funci?n de pintado del cliente.
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*/
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public void updateBuffer() { |
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updateImageCache(true);
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refreshImage(0, 0); |
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} |
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/**
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* Especifica el zoom que usar? por defecto el componente.
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* @param zoom
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*/
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public void setZoom(double zoom) { |
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initZoom = zoom; |
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this.zoom = initZoom;
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autoAdjusted = false;
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imageCenter(); |
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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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updateImageCache(true);
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refreshImage(0, 0); |
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} |
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/**
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* Hace un zoom de aumento en las coordenadas especificadas
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* @param x
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* @param y
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*/
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private void ZoomIn(double x, double y) { |
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if ((int) (zoom * 100.0) >= (25600.0 / initZoom)) |
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return;
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double xcent = (x / zoom);
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double ycent = (y / zoom);
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if (isXInverted())
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x1 -= xcent; |
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else
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x1 += xcent; |
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if (isYInverted())
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y1 -= ycent; |
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else
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y1 += ycent; |
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zoom = zoom * 2.0;
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xcent = (x / zoom); |
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ycent = (y / zoom); |
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if (isXInverted())
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x1 += xcent; |
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else
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x1 -= xcent; |
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if (isYInverted())
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y1 += ycent; |
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else
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y1 -= ycent; |
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updateImageCache(true);
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refreshImage(0, 0); |
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} |
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/**
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* Hace un zoom hacia afuera en las coordenadas especificadas
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* @param x
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* @param y
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*/
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private void ZoomOut(double x, double y) { |
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if ((int) ((1.0 / zoom) * 100.0) >= (25600.0 / initZoom)) |
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return;
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double xcent = (x / zoom);
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double ycent = (y / zoom);
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if (isXInverted())
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x1 -= xcent; |
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else
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x1 += xcent; |
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if (isYInverted())
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y1 -= ycent; |
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else
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y1 += ycent; |
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zoom = zoom / 2.0;
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xcent = (x / zoom); |
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ycent = (y / zoom); |
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if (isXInverted())
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x1 += xcent; |
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else
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x1 -= xcent; |
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if (isYInverted())
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y1 += ycent; |
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else
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y1 -= ycent; |
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updateImageCache(true);
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refreshImage(0, 0); |
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} |
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/**
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* Mostrar o ocultar la ayuda
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*
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*/
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private void callShowHelp() { |
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showHelp = !showHelp; |
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updateImageCache(true);
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refreshImage(0, 0); |
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} |
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/*
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* (non-Javadoc)
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* @see java.awt.event.KeyListener#keyPressed(java.awt.event.KeyEvent)
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*/
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public void keyPressed(KeyEvent e) { |
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switch (e.getKeyChar()) {
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case 'h': |
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case 'H': |
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callShowHelp(); |
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break;
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case '+': |
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ZoomIn(width / 2.0, height / 2.0); |
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autoAdjusted = false;
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break;
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case '-': |
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ZoomOut(width / 2.0, height / 2.0); |
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autoAdjusted = false;
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break;
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case '1': |
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autoAdjusted = false;
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this.zoom = initZoom;
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imageCenter(); |
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updateImageCache(true);
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refreshImage(0, 0); |
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break;
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case '2': |
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autoAdjusted = false;
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this.zoom = initZoom * 2.0; |
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imageCenter(); |
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updateImageCache(true);
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refreshImage(0, 0); |
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break;
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case '3': |
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autoAdjusted = false;
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this.zoom = initZoom * 4.0; |
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imageCenter(); |
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updateImageCache(true);
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refreshImage(0, 0); |
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break;
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case '4': |
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autoAdjusted = false;
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this.zoom = initZoom * 8.0; |
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imageCenter(); |
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updateImageCache(true);
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refreshImage(0, 0); |
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break;
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case '5': |
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autoAdjusted = false;
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this.zoom = initZoom * 16.0; |
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imageCenter(); |
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updateImageCache(true);
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refreshImage(0, 0); |
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break;
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case 'c': |
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case 'C': |
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imageCenter(); |
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updateImageCache(true);
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refreshImage(0, 0); |
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break;
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case '0': |
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case ' ': |
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autoAdjusted = true;
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updateDimensions(); |
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updateImageCache(true);
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refreshImage(0, 0); |
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break;
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} |
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} |
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double updateWidth = 0; |
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double updateHeight = 0; |
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/**
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* M?todo que hara la invocaci?n al cliente del pintado del trozo de imagen a
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* visualizar
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* @param forceUpdate
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*/
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private void updateImageCache(boolean forceUpdate) { |
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if (getWidgetImage() == null || |
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(updateWidth == getWidgetImage().getWidth(this) &&
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updateHeight == getWidgetImage().getHeight(this) &&
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!forceUpdate)) |
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return;
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updateWidth = getWidgetImage().getWidth(this);
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updateHeight = getWidgetImage().getHeight(this);
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getCacheGraphics().setColor(Color.WHITE);
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getCacheGraphics().fillRect(0, 0, width, height); |
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double newY1 = 0.0; |
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double newY2 = 0.0; |
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double newX1 = 0.0; |
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double newX2 = 0.0; |
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if (isYInverted()) {
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newY1 = y1 + this.getHeight() / zoom - ((y1 - initY1) * 2.0); |
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newY2 = newY1 - this.getHeight() / zoom;
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} else {
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newY1 = y1; |
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newY2 = y1 + this.getHeight() / zoom;
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} |
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if (isXInverted()) {
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newX1 = x1 + this.getWidth() / zoom - ((x1 - initX1) * 2.0); |
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newX2 = newX1 - this.getWidth() / zoom;
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} else {
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newX1 = x1; |
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newX2 = x1 + this.getWidth() / zoom;
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} |
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iClient.drawImage(getCacheGraphics(), newX1, newY1, newX2, newY2, zoom, this.getWidth(), this.getHeight()); |
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} |
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private Image getWidgetImage() { |
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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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image = createImage(width2, height2); |
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imageCache = createImage(width2, height2); |
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if (image == null) |
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return null; |
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widgetGraphics = (Graphics2D) image.getGraphics();
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cacheGraphics = (Graphics2D) imageCache.getGraphics();
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RenderingHints hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); |
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hints.add(new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY)); |
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cacheGraphics.setRenderingHints(hints); |
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} |
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width = width2; |
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height = height2; |
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return image;
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} |
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private Graphics2D getWidgetGraphics() { |
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getWidgetImage(); |
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return widgetGraphics;
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} |
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private Graphics2D getCacheGraphics() { |
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getWidgetImage(); |
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return cacheGraphics;
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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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private void redrawBuffer(int x, int y) { |
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getWidgetGraphics().setColor(Color.white);
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getWidgetGraphics().fillRect(0, 0, width, height); |
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getWidgetGraphics().drawImage(imageCache, x, y, null);
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if (showHelp)
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paintHelp((Graphics2D) getWidgetGraphics());
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else
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getWidgetGraphics().drawImage(getIconHelp().getImage(), width - getIconHelp().getIconWidth() - 4, 3, null); |
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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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if (autoAdjusted) updateDimensions();
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Graphics2D g2d = (Graphics2D) g; |
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RenderingHints hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); |
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hints.add(new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY)); |
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g2d.setRenderingHints(hints); |
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updateImageCache(false);
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redrawBuffer(0, 0); |
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if (image != null) |
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g.drawImage(image, 0, 0, this); |
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// paintHelp((Graphics2D) g);
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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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private void refreshImage(int x, int y) { |
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Graphics2D g2d = (Graphics2D) getGraphics(); |
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if (g2d == null) |
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return;
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RenderingHints hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); |
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hints.add(new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY)); |
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g2d.setRenderingHints(hints); |
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redrawBuffer(x, y); |
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if (image != null) |
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getGraphics().drawImage(image, 0, 0, this); |
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// paintHelp((Graphics2D) getGraphics());
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} |
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|
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/**
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* Devuelve el icono de cerrar
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* @return
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*/
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private ImageIcon getIconClose() { |
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if (imageIconClose == null) { |
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imageIconClose = new ImageIcon(getClass().getResource("images/close.png")); |
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} |
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return imageIconClose;
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} |
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|
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/**
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* Devuelve el icono ayuda
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* @return
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*/
|
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private ImageIcon getIconHelp() { |
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if (imageIconHelp == null) { |
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imageIconHelp = new ImageIcon(getClass().getResource("images/help.png")); |
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} |
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return imageIconHelp;
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} |
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|
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private void paintHelp(Graphics2D g) { |
| 492 |
int sep = 13; |
| 493 |
int pos = sep + 1; |
| 494 |
|
| 495 |
int alto = sep * 7 + 6; |
| 496 |
|
| 497 |
Image image2 = createImage(width, alto);
|
| 498 |
Graphics2D graphics2 = (Graphics2D) image2.getGraphics(); |
| 499 |
|
| 500 |
RenderingHints hints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); |
| 501 |
hints.add(new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY)); |
| 502 |
graphics2.setRenderingHints(hints); |
| 503 |
|
| 504 |
alto--; |
| 505 |
|
| 506 |
Color color1 = new Color(255, 255, 178); |
| 507 |
Color color2 = new Color(255, 255, 74); |
| 508 |
graphics2.setPaint(new GradientPaint(0, 0, color1, 0, alto, color2, false)); |
| 509 |
graphics2.fillRect(0, 0, width, alto); |
| 510 |
|
| 511 |
graphics2.setColor(new Color(0, 0, 0)); |
| 512 |
|
| 513 |
graphics2.setFont(new java.awt.Font("Tahoma", 1, sep - 2)); |
| 514 |
|
| 515 |
graphics2.drawString("Teclas:", 10, pos); |
| 516 |
|
| 517 |
graphics2.setFont(new java.awt.Font("Tahoma", 0, sep - 2)); |
| 518 |
pos+=sep; |
| 519 |
graphics2.drawString("H: Ayuda", 20, pos); |
| 520 |
pos+=sep; |
| 521 |
graphics2.drawString("1-5: Zoom", 20, pos); |
| 522 |
pos+=sep; |
| 523 |
graphics2.drawString("+: Acercar", 20, pos); |
| 524 |
pos+=sep; |
| 525 |
graphics2.drawString("-: Alejar", 20, pos); |
| 526 |
pos+=sep; |
| 527 |
graphics2.drawString("C: Centrar", 20, pos); |
| 528 |
pos+=sep; |
| 529 |
graphics2.drawString("Espacio, 0: Ver todo", 20, pos); |
| 530 |
|
| 531 |
graphics2.setColor(new Color(185, 185, 185)); |
| 532 |
graphics2.drawLine(0, alto, width, alto);
|
| 533 |
|
| 534 |
graphics2.drawImage(getIconClose().getImage(), width - getIconClose().getIconWidth() - 4, 3, null); |
| 535 |
|
| 536 |
AlphaComposite myAlpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f); |
| 537 |
g.setComposite(myAlpha); |
| 538 |
|
| 539 |
g.drawImage(image2, 0, 0, this); |
| 540 |
|
| 541 |
myAlpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1.0f); |
| 542 |
g.setComposite(myAlpha); |
| 543 |
} |
| 544 |
|
| 545 |
Point mouse = null; |
| 546 |
/*
|
| 547 |
* (non-Javadoc)
|
| 548 |
* @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)
|
| 549 |
*/
|
| 550 |
public void mousePressed(MouseEvent e) { |
| 551 |
if ((e.getX() > (width - 20)) && (e.getY() < 20)) { |
| 552 |
callShowHelp(); |
| 553 |
return;
|
| 554 |
} |
| 555 |
|
| 556 |
requestFocus(); |
| 557 |
if ((e.getButton() != MouseEvent.BUTTON1) && (e.getButton() != MouseEvent.BUTTON2)) |
| 558 |
return;
|
| 559 |
|
| 560 |
Color gris = new Color(0, 0, 0, 16); |
| 561 |
getCacheGraphics().setColor(gris); |
| 562 |
getCacheGraphics().fillRect(0, 0, width-1, height-1); |
| 563 |
getCacheGraphics().setColor(Color.gray);
|
| 564 |
getCacheGraphics().drawRect(0, 0, width-1, height-1); |
| 565 |
|
| 566 |
mouse = new Point(e.getX(), e.getY()); |
| 567 |
changePos(e.getX(), e.getY()); |
| 568 |
autoAdjusted = false;
|
| 569 |
} |
| 570 |
|
| 571 |
/*
|
| 572 |
* (non-Javadoc)
|
| 573 |
* @see java.awt.event.MouseMotionListener#mouseDragged(java.awt.event.MouseEvent)
|
| 574 |
*/
|
| 575 |
public void mouseDragged(MouseEvent e) { |
| 576 |
changePos(e.getX(), e.getY()); |
| 577 |
} |
| 578 |
|
| 579 |
/*
|
| 580 |
* (non-Javadoc)
|
| 581 |
* @see java.awt.event.MouseListener#mouseReleased(java.awt.event.MouseEvent)
|
| 582 |
*/
|
| 583 |
public void mouseReleased(MouseEvent e) { |
| 584 |
if (mouse != null) { |
| 585 |
x1 = x1 - ((e.getX() - mouse.getX())/zoom); |
| 586 |
y1 = y1 - ((e.getY() - mouse.getY())/zoom); |
| 587 |
updateImageCache(true);
|
| 588 |
refreshImage(0, 0); |
| 589 |
} |
| 590 |
mouse = null;
|
| 591 |
} |
| 592 |
|
| 593 |
private void changePos(int x, int y) { |
| 594 |
if (mouse != null) |
| 595 |
refreshImage((int) (x - mouse.getX()), (int) (y - mouse.getY())); |
| 596 |
} |
| 597 |
|
| 598 |
/**
|
| 599 |
* Evento de la rueda del rat?n para hacer Zoom In o Zoom Out en la posici?n
|
| 600 |
* del puntero.
|
| 601 |
*/
|
| 602 |
public void mouseWheelMoved(MouseWheelEvent e) { |
| 603 |
if (e.getWheelRotation() > 0) { |
| 604 |
ZoomOut(isXInverted() ? this.getWidth() - e.getX() : e.getX(), isYInverted() ? this.getHeight() - e.getY() : e.getY()); |
| 605 |
autoAdjusted = false;
|
| 606 |
} |
| 607 |
if (e.getWheelRotation() < 0) { |
| 608 |
ZoomIn(isXInverted() ? this.getWidth() - e.getX() : e.getX(), isYInverted() ? this.getHeight() - e.getY() : e.getY()); |
| 609 |
autoAdjusted = false;
|
| 610 |
} |
| 611 |
} |
| 612 |
|
| 613 |
/**
|
| 614 |
* Obtener si el eje de las Y esta invertido
|
| 615 |
* @return
|
| 616 |
*/
|
| 617 |
private boolean isYInverted() { |
| 618 |
return yInverted;
|
| 619 |
} |
| 620 |
|
| 621 |
/**
|
| 622 |
* Obtener si el eje de las X esta invertido
|
| 623 |
* @return
|
| 624 |
*/
|
| 625 |
private boolean isXInverted() { |
| 626 |
return xInverted;
|
| 627 |
} |
| 628 |
|
| 629 |
/*
|
| 630 |
* (non-Javadoc)
|
| 631 |
* @see java.awt.event.MouseMotionListener#mouseMoved(java.awt.event.MouseEvent)
|
| 632 |
*/
|
| 633 |
public void mouseMoved(MouseEvent e) { |
| 634 |
if ((e.getX() > (width - 20)) && (e.getY() < 20)) { |
| 635 |
setCursor(new Cursor(Cursor.HAND_CURSOR)); |
| 636 |
} else {
|
| 637 |
setCursor(new Cursor(Cursor.MOVE_CURSOR)); |
| 638 |
} |
| 639 |
} |
| 640 |
|
| 641 |
public void keyReleased(KeyEvent e) {} |
| 642 |
public void keyTyped(KeyEvent e) {} |
| 643 |
public void mouseClicked(MouseEvent e) {} |
| 644 |
public void mouseEntered(MouseEvent e) {} |
| 645 |
public void mouseExited(MouseEvent e) {} |
| 646 |
|
| 647 |
} |