?? editundo.java
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package com.opensymphony.workflow.designer.actions;import java.awt.event.ActionEvent;import javax.swing.*;import javax.swing.undo.CannotUndoException;import com.opensymphony.workflow.designer.WorkflowDesigner;import com.opensymphony.workflow.designer.WorkflowGraph;/** * @version $Revision: 1.1 $ * @author Quake Wang * @since 2004-4-29 */public class EditUndo extends AbstractAction{ public EditUndo() { setEnabled(false); } public void actionPerformed(ActionEvent e) { try { WorkflowGraph graph = WorkflowDesigner.INSTANCE.getCurrentGraph(); graph.getUndoManager().undo(graph.getGraphLayoutCache()); graph.getUndoManager().updateHistoryButtons(); } catch(CannotUndoException ex) { System.out.println("Unable to undo: " + ex); ex.printStackTrace(); } }}?? 快捷鍵說明
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