source: extensions/jiwigo/trunk/src/main/java/fr/mael/jiwigo/ui/browser/BrowserImagePanel.java @ 6833

package fr.mael.jiwigo.ui.browser;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.util.Hashtable;

import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

import fr.mael.jiwigo.transverse.util.ImagesUtil;

/**
   Copyright (c) 2010, Mael
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of jiwigo nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   DISCLAIMED. IN NO EVENT SHALL Mael BE LIABLE FOR ANY
   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   
 * Panel qui affiche une image
 * @author mael
 *
 */
public class BrowserImagePanel extends JPanel implements MouseWheelListener, Printable {
    private BufferedImage image;
    private double scale = 1.0;
    boolean flipH = false;
    boolean flipV = false;
    private int valueSlider = 16;

    /**
     * Constructeur
     * @param image
     */
    public BrowserImagePanel(BufferedImage image) {
        this.image = image;
        this.addMouseWheelListener(this);
    }

    /* (non-Javadoc)
     * @see javax.swing.JComponent#paintComponent(java.awt.Graphics)
     */
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
        double x = (getWidth() - scale * image.getWidth()) / 2;
        double y = (getHeight() - scale * image.getHeight()) / 2;
        AffineTransform at = AffineTransform.getTranslateInstance(x, y);
        if (flipV && !flipH) {
            at.scale(scale, -scale);
            at.translate(0, -getHeight() / 2);
        } else if (flipH && !flipV) {
            at.scale(-scale, scale);
            at.translate(-getWidth() / 2, 0);
        } else if (flipH && flipV) {
            at.scale(-scale, -scale);
            at.translate(-getWidth() / 2, -getHeight() / 2);
        } else {
            at.scale(scale, scale);
        }

        g2.drawRenderedImage(image, at);

    }

    /* (non-Javadoc)
     * @see javax.swing.JComponent#getPreferredSize()
     */
    public Dimension getPreferredSize() {
        int w = (int) (scale * image.getWidth());
        int h = (int) (scale * image.getHeight());
        return new Dimension(w, h);
    }

    /**
     * Récupération du slider
     * @return le slider
     */
    public JSlider getSlider() {
        int min = 1, max = 36, inc = 10;
        final JSlider slider = new JSlider(min, max, 16);
        slider.setMajorTickSpacing(5);
        slider.setMinorTickSpacing(1);
        slider.setPaintTicks(true);
        slider.setSnapToTicks(true);
        slider.setLabelTable(getLabelTable(min, max, inc));
        slider.setPaintLabels(true);
        slider.addChangeListener(new ChangeListener() {
            public void stateChanged(ChangeEvent e) {
                int value = slider.getValue();
                valueSlider = value;
                scale = (value + 4) / 20.0;
                revalidate();
                repaint();
            };
        });
        return slider;
    }

    public void zoomIn() {

        scale = (++valueSlider + 4) / 20.0;
        revalidate();
        repaint();
    }

    public void zoomOut() {
        if (scale > 0) {
            scale = (--valueSlider + 4) / 20.0;
            revalidate();
            repaint();
        }
    }

    public void zoomNormal() {

        scale = 1.0;
        revalidate();
        repaint();
    }

    /**
     * Label du slider
     * @param min
     * @param max
     * @param inc
     * @return
     */
    private Hashtable getLabelTable(int min, int max, int inc) {
        Hashtable<Integer, JLabel> table = new Hashtable<Integer, JLabel>();
        for (int j = min; j <= max; j += inc) {
            String s = String.format("%.2f", (j + 4) / 20.0);
            table.put(Integer.valueOf(j), new JLabel(s));
        }
        return table;
    }

    /**
     *  Rotation vers la droite
     */
    public void rotationDroite() {
        setImage(ImagesUtil.rotate(image, Math.PI / 2));
    }

    /**
     * Rotation vers la gauche
     */
    public void rotationGauche() {
        setImage(ImagesUtil.rotate(image, -Math.PI / 2));
    }

    /**
     * @return the image
     */
    public BufferedImage getImage() {
        return image;
    }

    /**
     * @param image the image to set
     */
    public void setImage(BufferedImage image) {
        this.image = image;
        revalidate();
        repaint();
    }

    @Override
    public void mouseWheelMoved(MouseWheelEvent arg0) {
        int notches = arg0.getWheelRotation();
        String message;
        String newline = "\n";
        if (notches < 0) {
            zoomIn();

        } else {
            zoomOut();
        }

    }

    @Override
    public int print(Graphics arg0, PageFormat arg1, int arg2) throws PrinterException {
        if (arg2 != 0)
            return NO_SUCH_PAGE;
        Graphics2D g2 = (Graphics2D) arg0;
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
        double x = (getWidth() - scale * image.getWidth()) / 2;
        double y = (getHeight() - scale * image.getHeight()) / 2;
        AffineTransform at = AffineTransform.getTranslateInstance(x, y);
        if (flipV && !flipH) {
            at.scale(scale, -scale);
            at.translate(0, -getHeight() / 2);
        } else if (flipH && !flipV) {
            at.scale(-scale, scale);
            at.translate(-getWidth() / 2, 0);
        } else if (flipH && flipV) {
            at.scale(-scale, -scale);
            at.translate(-getWidth() / 2, -getHeight() / 2);
        } else {
            at.scale(scale, scale);
        }

        g2.drawRenderedImage(image, at);
        return PAGE_EXISTS;
    }

}