（元に戻す/やり直し|| KeyStrokes）がJEditorPaneで機能しない

Question

私はこれとあまりにも長い間戦ってきたので誰かが助けてくれることを願っています。

私がJEditorPaneの拡張クラスで（私はhttp://alvinalexander.com/java/java-undo-redoで発見）元に戻す/やり直しを実装しようとしています：私のキーストロークが解雇されていない何らかの理由または元に戻すため

public class TextEditor extends JEditorPane { 

class UndoHandler implements UndoableEditListener { 

    @Override 
    public void undoableEditHappened(UndoableEditEvent e) { 
    undoManager.addEdit(e.getEdit()); 
    undoAction.update(); 
    redoAction.update(); 
    } 
} 

class UndoAction extends AbstractAction { 
    public UndoAction() { 
    super("Undo"); 
    setEnabled(false); 
    } 

    @Override 
    public void actionPerformed(ActionEvent e) { 
    System.out.println("UNDO!"); 
    try { 
     undoManager.undo(); 
    } catch (CannotUndoException ex) { 
     // TODO deal with this 
     ex.printStackTrace(); 
    } 
    update(); 
    redoAction.update(); 
    } 

    protected void update() { 
    if (undoManager.canUndo()) { 
     setEnabled(true); 
     putValue(Action.NAME, undoManager.getUndoPresentationName()); 
    } else { 
     setEnabled(false); 
     putValue(Action.NAME, "Undo"); 
    } 
    } 
} 

class RedoAction extends AbstractAction { 
    public RedoAction() { 
    super("Redo"); 
    setEnabled(false); 
    } 

    @Override 
    public void actionPerformed(ActionEvent e) { 
     System.out.println("REDO!"); 
    try { 
     undoManager.redo(); 
    } catch (CannotRedoException ex) { 
     ex.printStackTrace(); 
    } 
    update(); 
    undoAction.update(); 
    } 

    protected void update() { 
    if (undoManager.canRedo()) { 
     setEnabled(true); 
     putValue(Action.NAME, undoManager.getRedoPresentationName()); 
    } else { 
     setEnabled(false); 
     putValue(Action.NAME, "Redo"); 
    } 
    } 
} 

private UndoHandler undoHandler = new UndoHandler(); 
private UndoManager undoManager = new UndoManager(); 
private UndoAction undoAction = new UndoAction(); 
private RedoAction redoAction = new RedoAction(); 

public TextEditor() { 
    super(); 
    this.setEditorKit(new ShowSpecCharsEditorKit()); 

    this.getDocument().addUndoableEditListener(undoHandler); 
    KeyStroke undoKeystroke = KeyStroke.getKeyStroke(KeyEvent.VK_Z, Event.CTRL_MASK); 
    KeyStroke redoKeystroke = KeyStroke.getKeyStroke(KeyEvent.VK_Y, Event.CTRL_MASK); 

    this.getInputMap().put(undoKeystroke, "undoKeystroke"); 
    this.getActionMap().put("undoKeystroke", undoAction); 

    this.getInputMap().put(redoKeystroke, "redoKeystroke"); 
    this.getActionMap().put("redoKeystroke", redoAction); 


    this.addCaretListener(new CaretListener() { 

     @Override 
     public void caretUpdate(CaretEvent e) { 

      ((EditorTab)getParent().getParent()).updateTabTitle(true); 
     } 
    }); 
} 

@Override 
public void read(Reader r, Object desc) throws IOException{ 
    super.read(r, desc); 
} 

} 

/リドゥは、単に」にISN働いている。

私はそれを動作させることができません。誰かが私に何かを指してくれますか？

Answer 1

あなたのコードは、私はあなたのコードから

を

this.setEditorKit(new ShowSpecCharsEditorKit());をコメントしたときに、これはエディタキットに問題がある可能性があり、キーストロークのカスタムたEditorKit（ShowSpecCharsEditorKit）の実装のコードを確認してください正常に動作しているようですとアクション。

public class TextEditor extends JEditorPane { 

    class UndoHandler implements UndoableEditListener { 

     @Override 
     public void undoableEditHappened(UndoableEditEvent e) { 
      undoManager.addEdit(e.getEdit()); 
      undoAction.update(); 
      redoAction.update(); 
     } 
    } 

    class UndoAction extends AbstractAction { 
     public UndoAction() { 
      super("Undo"); 
      setEnabled(false); 
     } 

     @Override 
     public void actionPerformed(ActionEvent e) { 
      System.out.println("UNDO!"); 
      try { 
       undoManager.undo(); 
      } catch (CannotUndoException ex) { 
       // TODO deal with this 
       ex.printStackTrace(); 
      } 
      update(); 
      redoAction.update(); 
     } 

     protected void update() { 
      if (undoManager.canUndo()) { 
       setEnabled(true); 
       putValue(Action.NAME, undoManager.getUndoPresentationName()); 
      } else { 
       setEnabled(false); 
       putValue(Action.NAME, "Undo"); 
      } 
     } 
    } 

    class RedoAction extends AbstractAction { 
     public RedoAction() { 
      super("Redo"); 
      setEnabled(false); 
     } 

     @Override 
     public void actionPerformed(ActionEvent e) { 
      System.out.println("REDO!"); 
      try { 
       undoManager.redo(); 
      } catch (CannotRedoException ex) { 
       ex.printStackTrace(); 
      } 
      update(); 
      undoAction.update(); 
     } 

     protected void update() { 
      if (undoManager.canRedo()) { 
       setEnabled(true); 
       putValue(Action.NAME, undoManager.getRedoPresentationName()); 
      } else { 
       setEnabled(false); 
       putValue(Action.NAME, "Redo"); 
      } 
     } 
    } 

    private UndoHandler undoHandler = new UndoHandler(); 
    private UndoManager undoManager = new UndoManager(); 
    private UndoAction undoAction = new UndoAction(); 
    private RedoAction redoAction = new RedoAction(); 

    public TextEditor() { 
     super(); 
     // this.setEditorKit(new ShowSpecCharsEditorKit()); 

     this.getDocument().addUndoableEditListener(undoHandler); 
     KeyStroke undoKeystroke = KeyStroke.getKeyStroke(KeyEvent.VK_Z, Event.CTRL_MASK); 
     KeyStroke redoKeystroke = KeyStroke.getKeyStroke(KeyEvent.VK_Y, Event.CTRL_MASK); 

     this.getInputMap().put(undoKeystroke, "undoKeystroke"); 
     this.getActionMap().put("undoKeystroke", undoAction); 

     this.getInputMap().put(redoKeystroke, "redoKeystroke"); 
     this.getActionMap().put("redoKeystroke", redoAction); 

     this.addCaretListener(new CaretListener() { 

     @Override 
     public void caretUpdate(CaretEvent e) { 

     // ((EditorTab)getParent().getParent()).updateTabTitle(true); 
     } 
     }); 
    } 

    @Override 
    public void read(Reader r, Object desc) throws IOException { 
     super.read(r, desc); 
    } 

    public static void main(String[] args) { 
     JFrame jframe = new JFrame(); 
     jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     jframe.setSize(500, 500); 
     jframe.add(new TextEditor()); 
     jframe.setVisible(true); 
    } 
}