TITLE:UndoManagerでJTextFieldのUndo、Redoを行う
#navi(../)
RIGHT:Posted by [[terai]] at 2009-06-15
*UndoManagerでJTextFieldのUndo、Redoを行う [#o9568fb8]
JTextFieldのドキュメントにUndoManagerを追加して、Undo、Redoを行います。

-&jnlp;
-&jar;
-&zip;

#screenshot

**サンプルコード [#n383e6ed]
#code{{
private static void initUndoRedo(JTextComponent tc) {
  UndoManager manager = new UndoManager();
  tc.getDocument().addUndoableEditListener(manager);
  tc.getActionMap().put("undo", new UndoAction(manager));
  tc.getActionMap().put("redo", new RedoAction(manager));
  InputMap imap = tc.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
  imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_Z, Event.CTRL_MASK), "undo");
  imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_Y, Event.CTRL_MASK), "redo");
}
private static class UndoAction extends AbstractAction {
  private final UndoManager undoManager;
  public UndoAction(UndoManager manager) {
    super("undo");
    this.undoManager = manager;
  }
  public void actionPerformed(ActionEvent e) {
    try{
      undoManager.undo();
    }catch(CannotUndoException cue) {
      //cue.printStackTrace();
      Toolkit.getDefaultToolkit().beep();
    }
  }
}
}}

**解説 [#bc37965c]
Document#addUndoableEditListener(UndoManager)メソッドを使って、JTextFieldでUndo、Redoができるように設定しています。
-Undo
--Ctrl-Z
-Redo
--Ctrl-Y

**参考リンク [#k994a5a2]
-[[Text Component Features (The Java? Tutorials > Creating a GUI with JFC/Swing > Using Swing Components)>http://java.sun.com/docs/books/tutorial/uiswing/components/generaltext.html#undo]]

**コメント [#jdc94c6b]
#comment