jtreetransferhandler.java

来自「JRemoteControl is a simple Java&#8482 dr」· Java 代码 · 共 72 行

/*
 * JRemCntl - Copyright (C) 2007 Filippo Di Vattimo <[e-mail]>
 * See COPYING
 */

package fildiv.jremcntl.server.gui.util.swing;

import java.awt.datatransfer.Transferable;

import javax.swing.JComponent;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.tree.TreePath;

public class JTreeTransferHandler extends TransferHandler {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	private Object draggedNode = null;

	protected Transferable createTransferable(JComponent c) {

		Transferable t = null;

		if (c instanceof JTree) {
			JTree jTree = (JTree) c;
			t = new GenericTransferable(jTree.getSelectionPaths());

			draggedNode = null;

			TreePath dragPath = jTree.getSelectionPath();
			if (dragPath != null)
				draggedNode = dragPath.getLastPathComponent();
		}

		return t;
	}

	public int getSourceActions(JComponent c) {
		return TransferHandler.MOVE;
	}

	protected void exportDone(JComponent source, Transferable data, int action) {

		if (!(source instanceof JTree))
			return;

		JTree tree = (JTree) source;

		TreePath currentPath = tree.getSelectionPath();
		if (currentPath != null) {
			Object targetNode = currentPath.getLastPathComponent();

			exportDone(tree, draggedNode, targetNode);
		}
		
	  	super.exportDone(source, data, action);
	}

	public Object getDraggedNode() {
		return draggedNode;
	}
	

	protected void exportDone(JTree tree, Object draggedNode, Object targetNode) {
		
	}

}