mypictransferable.java

Java 简易小相册.帮你理解Drag and Drop 的功能.

import java.awt.Image;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;

/*
 * Created on 1/07/2006
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */

/**
 * @author Xuesong Le
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class MyPicTransferable implements Transferable
{
 private
    Image
    	img = null;

    public MyPicTransferable(MyPicComponent picComp)
    {
        img = picComp.getImage();
    }
    
    /* (non-Javadoc)
     * @see java.awt.datatransfer.Transferable#getTransferDataFlavors()
     */
    public DataFlavor[] getTransferDataFlavors()
    {
        return new DataFlavor[] {DataFlavor.imageFlavor};
    }

    /* (non-Javadoc)
     * @see java.awt.datatransfer.Transferable#isDataFlavorSupported(java.awt.datatransfer.DataFlavor)
     */
    public boolean isDataFlavorSupported(DataFlavor arg0)
    {
        // TODO Auto-generated method stub
        return arg0.equals(DataFlavor.imageFlavor);
    }

    /* (non-Javadoc)
     * @see java.awt.datatransfer.Transferable#getTransferData(java.awt.datatransfer.DataFlavor)
     */
    public Object getTransferData(DataFlavor arg0) throws UnsupportedFlavorException
    {
        if( !isDataFlavorSupported(arg0))
        {
            throw new UnsupportedFlavorException(arg0);
        }
       
        return img;
    }
}