ExportToPNGAction.java

/* ===========================================================
 * Orson Charts : a 3D chart library for the Java(tm) platform
 * ===========================================================
 * 
 * (C)opyright 2013-2016, by Object Refinery Limited.  All rights reserved.
 * 
 * http://www.object-refinery.com/orsoncharts/index.html
 * 
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 * 
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 * 
 * If you do not wish to be bound by the terms of the GPL, an alternative
 * commercial license can be purchased.  For details, please see visit the
 * Orson Charts home page:
 * 
 * http://www.object-refinery.com/orsoncharts/index.html
 * 
 */

package com.orsoncharts.graphics3d.swing;

import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.geom.Dimension2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.AbstractAction;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;

import com.orsoncharts.Resources;
import com.orsoncharts.util.ArgChecks;

/**
 * An action that handles saving the content of a panel to a PNG image.
 * <br><br>
 * NOTE: This class is serializable, but the serialization format is subject 
 * to change in future releases and should not be relied upon for persisting 
 * instances of this class. 
 */
@SuppressWarnings("serial")
public class ExportToPNGAction extends AbstractAction {

    /** The panel to which this action applies. */
    private Panel3D panel;
  
    /**
     * Creates a new action instance.
     * 
     * @param panel  the panel ({@code null} not permitted).
     */
    public ExportToPNGAction(Panel3D panel) {
        super(Resources.localString("PNG_MENU_LABEL"));
        ArgChecks.nullNotPermitted(panel, "panel");
        this.panel = panel;
    }

    /**
     * Writes the content of the panel to a PNG image, using Java's ImageIO.
     * 
     * @param e  the event.
     */
    @Override
    public void actionPerformed(ActionEvent e) {
        JFileChooser fileChooser = new JFileChooser();
        FileNameExtensionFilter filter = new FileNameExtensionFilter(
            Resources.localString("PNG_FILE_FILTER_DESCRIPTION"), "png");
        fileChooser.addChoosableFileFilter(filter);
        fileChooser.setFileFilter(filter);

        int option = fileChooser.showSaveDialog(this.panel);
        if (option == JFileChooser.APPROVE_OPTION) {
            String filename = fileChooser.getSelectedFile().getPath();
            if (!filename.endsWith(".png")) {
                filename = filename + ".png";
            }
            Dimension2D size = this.panel.getSize();
            int w = (int) size.getWidth();
            int h = (int) size.getHeight();
            BufferedImage image = new BufferedImage(w, h, 
                    BufferedImage.TYPE_INT_ARGB);
            Graphics2D g2 = image.createGraphics();
            this.panel.getDrawable().draw(g2, new Rectangle(w, h));
            try {
                ImageIO.write(image, "png", new File(filename));
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        }
    }
    
}