?? transferabletreenode.java
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// TransferableTreeNode.java// A Transferable TreePath to be used with Drag & Drop applications.//import java.io.*;import java.awt.dnd.*;import java.awt.datatransfer.*;import javax.swing.tree.*;public class TransferableTreeNode implements Transferable { public static DataFlavor TREE_PATH_FLAVOR = new DataFlavor(TreePath.class, "Tree Path"); DataFlavor flavors[] = { TREE_PATH_FLAVOR }; TreePath path; public TransferableTreeNode(TreePath tp) { path = tp; } public synchronized DataFlavor[] getTransferDataFlavors() { return flavors; } public boolean isDataFlavorSupported(DataFlavor flavor) { return (flavor.getRepresentationClass() == TreePath.class); } public synchronized Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException { if (isDataFlavorSupported(flavor)) { return (Object)path; } else { throw new UnsupportedFlavorException(flavor); } }}
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