imagetransferhandler.java

JAVA图形特效,详细介绍SWING等的效果开发

/*
 * Copyright (c) 2007, Romain Guy
 * 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 the TimingFramework project 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 THE COPYRIGHT
 * OWNER OR CONTRIBUTORS 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.
 */

package org.progx.artemis.ui;

import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.List;
import javax.swing.TransferHandler;

import org.progx.artemis.graphics.GraphicsUtilities;
import org.progx.artemis.Application;

class ImageTransferHandler extends TransferHandler {
    @Override
    public boolean canImport(TransferSupport support) {
        if (!support.isDrop()) {
            return false;
        }
        if (!support.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
            return false;
        }
        boolean copySupported = (COPY & support.getSourceDropActions()) == COPY;
        if (copySupported) {
            support.setDropAction(COPY);
            return true;
        }
        return false;
    }

    @Override
    public boolean importData(TransferSupport support) {
        if (!support.isDrop()) {
            return false;
        }
        if (!support.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
            return false;
        }

        Transferable t = support.getTransferable();
        try {
            Object data =
                    t.getTransferData(DataFlavor.javaFileListFlavor);
            final File file = ((List<File>) data).get(0);

            Thread loader = new Thread(new Runnable() {
                public void run() {
                    Application.getMainFrame().showWaitGlassPane();
                    try {
                        BufferedImage image = GraphicsUtilities
                                .loadCompatibleImage(file.toURI().toURL());
                        Application.getMainFrame().setImage(image, file.getName());
                    } catch (IOException e) {
                        e.printStackTrace();
                        Application.getMainFrame().hideWaitGlassPane();
                    }
                }
            });
            loader.start();
        } catch (UnsupportedFlavorException e) {
            return false;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return true;
    }
}