| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 */

package org.gvsig.gui.beans.colorbutton;

import java.awt.Color;

import java.awt.Cursor;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Shape;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.util.ArrayList;

import java.util.EventObject;

import java.util.Iterator;

import javax.swing.JComponent;

import org.gvsig.gui.beans.colorchooser.ColorChooserListener;

/**

 *

 * @version 03/08/2007

 * @author BorSanZa - Borja S?nchez Zamorano (borja.sanchez@iver.es)

 */

public class ColorButton extends JComponent implements MouseListener, ColorChooserListener {

        private static final long serialVersionUID = 6003841064431749542L;

        private ArrayList<ColorButtonListener> actionCommandListeners = new ArrayList<ColorButtonListener>();

        private Color             color            = Color.black;

        private ColorButtonDialog colorButtonPanel = null;

        private Image             bufferImage      = null;

        private int               width            = 0;

        private int               height           = 0;

        private Graphics          bufferGraphics   = null;

        public ColorButton() {

                setPreferredSize(new Dimension(40, 22));

                setCursor(new Cursor(Cursor.HAND_CURSOR));

                setColor(Color.black);

                addMouseListener(this);

        }

        public void setColor(Color value) {

                color = value;

                refreshImage();

        }

        public Color getColor() {

                return color;

        }

        /*

         * (non-Javadoc)

         * @see java.awt.event.MouseListener#mousePressed(java.awt.event.MouseEvent)

         */

        public void mousePressed(MouseEvent e) {

                if (!isEnabled())

                        return;

                colorButtonPanel = new ColorButtonDialog();

                Color oldColor = getColor();

                colorButtonPanel.setColor(oldColor);

                colorButtonPanel.addValueChangedListener(this);

                if (!colorButtonPanel.showDialog()) {

                        setColor(oldColor);

                        callValueChangedListeners();

                }

        }

        public void actionValueChanged(EventObject e) {

                setColor(colorButtonPanel.getColor());

                callValueChangedListeners();

        }

        public void actionValueDragged(EventObject e) {

                setColor(colorButtonPanel.getColor());

                callValueDraggedListeners();

        }

        /**

         * Crea un graphics con las dimensiones del componente si no estaba creado y

         * lo devuelve para poder usarlo para dibujar en ?l.

         * @return Graphics

         */

        private Graphics getBufferGraphics() {

                int width2 = getBounds().width;

                int height2 = getBounds().height;

                if (width2 <= 0)

                        width2 = 1;

                if (height2 <= 0)

                        height2 = 1;

                if ((width != width2) || (height != height2)) {

                        bufferImage = createImage(width2, height2);

                        if (bufferImage == null)

                                return null;

                        bufferGraphics = bufferImage.getGraphics();

                }

                width = width2;

                height = height2;

                return bufferGraphics;

        }

        /**

         * Redibujar el componente en el graphics temporal

         */

        private void redrawBuffer() {

                if (getBufferGraphics() == null)

                        return;

                Color newColor = color;

                if (isEnabled()) {

                        Shape oldClip = getBufferGraphics().getClip();

                        getBufferGraphics().setClip(1, 1, width - 2, height - 2);

                        if ((color == null) || (color.getAlpha() != 255)) {

                                for (int i = 0; (i * 4) <= width; i++) {

                                        for (int j = 0; (j * 4) <= height; j++) {

                                                if ((i + j) % 2 == 0)

                                                        getBufferGraphics().setColor(Color.white);

                                                else

                                                        getBufferGraphics().setColor(new Color(204, 204, 204));

                                                getBufferGraphics().fillRect(1 + i * 4, 1 + j * 4, 4, 4);

                                        }

                                }

                        }

                        getBufferGraphics().setClip(oldClip);

                        newColor = color;

                } else {

                        newColor = getBackground();

                }

                if (newColor != null) {

                        getBufferGraphics().setColor(newColor);

                        getBufferGraphics().fillRect(1, 1, width - 2, height - 2);

                }

                if (isEnabled())

                        getBufferGraphics().setColor(Color.black);

                else

                        getBufferGraphics().setColor(new Color(172, 168, 153));

                getBufferGraphics().drawRect(0, 0, width - 1, height - 1);

        }

        /**

         * Redibujar el componente en el graphics temporal y representarlo en el

         * componente

         */

        private void refreshImage() {

                redrawBuffer();

                if (bufferImage != null)

                        getGraphics().drawImage(bufferImage, 0, 0, this);

                super.paint(getGraphics());

        }

        /*

         * (non-Javadoc)

         * @see javax.swing.JComponent#paint(java.awt.Graphics)

         */

        public void paint(Graphics g) {

                redrawBuffer();

                g.drawImage(bufferImage, 0, 0, this);

                super.paint(g);

        }

        /**

         * A?adir un listener a la lista de eventos

         * @param listener

         */

        public void addValueChangedListener(ColorButtonListener listener) {

                if (!actionCommandListeners.contains(listener))

                        actionCommandListeners.add(listener);

        }

        /**

         * Borrar un listener de la lista de eventos

         * @param listener

         */

        public void removeValueChangedListener(ColorButtonListener listener) {

                actionCommandListeners.remove(listener);

        }

        /**

         * Invocar a los eventos asociados al componente

         */

        private void callValueChangedListeners() {

                Iterator<ColorButtonListener> acIterator = actionCommandListeners.iterator();

                while (acIterator.hasNext()) {

                        ColorButtonListener listener = acIterator.next();

                        listener.actionValueChanged(new ColorButtonEvent(this));

                }

        }

        /**

         * Invocar a los eventos asociados al componente

         */

        private void callValueDraggedListeners() {

                Iterator<ColorButtonListener> acIterator = actionCommandListeners.iterator();

                while (acIterator.hasNext()) {

                        ColorButtonListener listener = acIterator.next();

                        listener.actionValueDragged(new ColorButtonEvent(this));

                }

        }

        public void mouseClicked(MouseEvent e) {}

        public void mouseReleased(MouseEvent e) {}

        public void mouseEntered(MouseEvent e) {}

        public void mouseExited(MouseEvent e) {}

}