org.jpedal.examples.viewer.commands.generic.GUIExtractSelectionAsImage Maven / Gradle / Ivy

/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
     This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


 *
 * ---------------
 * GUIExtractSelectionAsImage.java
 * ---------------
 */


package org.jpedal.examples.viewer.commands.generic;

import java.awt.Image;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.image.BufferedImage;
import java.io.IOException;

import org.jpedal.PdfDecoderInt;
import org.jpedal.examples.viewer.Values;
import org.jpedal.gui.GUIFactory;

/**
 * This is a generic class which holds generic code for
 * Extracting the drawn CursorBox as an Image.
 */
public class GUIExtractSelectionAsImage {

    protected static BufferedImage snapShot;


    /**
     * Generic method to extract selected area
     * as a rectangle and show onscreen.
     * 
     * Swing needs extracting into ExtractSelectionAsImage.
     */
    protected static void extractSelectedScreenAsImage(final Values commonValues, final GUIFactory currentGUI, final PdfDecoderInt decode_pdf) {

        int t_x1 = commonValues.m_x1;
        int t_x2 = commonValues.m_x2;
        int t_y1 = commonValues.m_y1;
        int t_y2 = commonValues.m_y2;

        if (commonValues.m_y1 < commonValues.m_y2) {
            t_y2 = commonValues.m_y1;
            t_y1 = commonValues.m_y2;
        }

        if (commonValues.m_x1 > commonValues.m_x2) {
            t_x2 = commonValues.m_x1;
            t_x1 = commonValues.m_x2;
        }

        snapShot = decode_pdf.getSelectedRectangleOnscreen(t_x1, t_y1, t_x2, t_y2, 100 * currentGUI.getScaling());
    }


    protected static class ClipboardImage implements Transferable {

        Image image;

        public ClipboardImage(final Image i) {
            this.image = i;
        }

        @Override
        public Object getTransferData(final DataFlavor flavor) throws IOException, UnsupportedFlavorException {
            if (image != null && flavor.equals(DataFlavor.imageFlavor)) {
                return image;
            } else {
                throw new UnsupportedFlavorException(flavor);
            }
        }

        @Override
        public DataFlavor[] getTransferDataFlavors() {
            return new DataFlavor[]{DataFlavor.imageFlavor};
        }

        @Override
        public boolean isDataFlavorSupported(final DataFlavor flavor) {
            final DataFlavor[] flavors = getTransferDataFlavors();
            for (final DataFlavor flavor1 : flavors) {
                if (flavor.equals(flavor1)) {
                    return true;
                }
            }

            return false;
        }
    }
}