?? undomanager.java
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package com.opensymphony.workflow.designer;import javax.swing.event.UndoableEditEvent;import org.jgraph.graph.GraphUndoManager;/** * @version $Revision: 1.1 $ * @author Quake Wang * @since 2004-4-29 */public class UndoManager extends GraphUndoManager{ public void undoableEditHappened(UndoableEditEvent e) { super.undoableEditHappened(e); updateHistoryButtons(); } public void updateHistoryButtons() { ActionManager.get("redo").setEnabled(this.canRedo()); ActionManager.get("undo").setEnabled(this.canUndo()); }}?? 快捷鍵說(shuō)明
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