자바 CTRL+Z, Y on JTextField, JComboBox

MyComboBox.java

import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.JTextComponent;
import javax.swing.undo.*;

public class MyComboBox extends JComboBox {


	final UndoManager undoMgr = new UndoManager();
	
	public MyComboBox() {
		super();
        init();
    }
	
    public final static String UNDO_ACTION = "Undo";

    public final static String REDO_ACTION = "Redo";

    private void init()
    {

    	setEditable(true);

        getEditor().getEditorComponent().addKeyListener(new KeyAdapter() {
		    @Override
		    public void keyReleased(KeyEvent event) {
		        if (event.getKeyCode() == KeyEvent.VK_F3)
		        {
		        	addItem((String)((JTextComponent)getEditor().getEditorComponent()).getText());
		        }
		        else if (event.getKeyCode() == KeyEvent.VK_F4)
		        {
		        	removeItemAt(getSelectedIndex());
		        }
		    }
		    public void keyPressed(KeyEvent e) {
		        if (e.getKeyCode() == KeyEvent.VK_Z && e.isControlDown()) {
		            if (undoMgr.canUndo()) {
		            	undoMgr.undo();
		            }
		        } else if (e.getKeyCode() == KeyEvent.VK_Y && e.isControlDown()) {
		            if (undoMgr.canRedo()) {
		            	undoMgr.redo();
		            }
		        }
		    }
		});

        // Add listener for undoable events
    	(((JTextField)getEditor().getEditorComponent()).getDocument()).addUndoableEditListener(new UndoableEditListener() {
            public void undoableEditHappened(UndoableEditEvent pEvt) {
                undoMgr.addEdit(pEvt.getEdit());
            }
        });

    }

}

 

 

MyTextField.java

import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.JTextComponent;
import javax.swing.undo.*;

public class MyTextField extends JTextField {
    public MyTextField() {
        final UndoManager undoMgr = new UndoManager();

        // Add listener for undoable events
        getDocument().addUndoableEditListener(new UndoableEditListener() {
            public void undoableEditHappened(UndoableEditEvent pEvt) {
                undoMgr.addEdit(pEvt.getEdit());
            }
        });

        // Add undo/redo actions
        getActionMap().put(UNDO_ACTION, new AbstractAction(UNDO_ACTION) {
            public void actionPerformed(ActionEvent pEvt) {
                try {
                    if (undoMgr.canUndo()) {
                        undoMgr.undo();
                    }
                } catch (CannotUndoException e) {
                    e.printStackTrace();
                }
            }
        });
        getActionMap().put(REDO_ACTION, new AbstractAction(REDO_ACTION) {
            public void actionPerformed(ActionEvent pEvt) {
                try {
                    if (undoMgr.canRedo()) {
                        undoMgr.redo();
                    }
                } catch (CannotRedoException e) {
                    e.printStackTrace();
                }
            }
        });

        // Create keyboard accelerators for undo/redo actions (Ctrl+Z/Ctrl+Y)
        getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK),
            UNDO_ACTION);
        getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_DOWN_MASK),
            REDO_ACTION);
    }
    
    public final static String UNDO_ACTION = "Undo";

    public final static String REDO_ACTION = "Redo";

    public static void makeUndoable(JTextComponent pTextComponent) {
        final UndoManager undoMgr = new UndoManager();

        // Add listener for undoable events
        pTextComponent.getDocument().addUndoableEditListener(new UndoableEditListener() {
            public void undoableEditHappened(UndoableEditEvent evt) {
                undoMgr.addEdit(evt.getEdit());
            }
        });

        // Add undo/redo actions
        pTextComponent.getActionMap().put(UNDO_ACTION, new AbstractAction(UNDO_ACTION) {
            public void actionPerformed(ActionEvent evt) {
                try {
                    if (undoMgr.canUndo()) {
                        undoMgr.undo();
                    }
                } catch (CannotUndoException e) {
                    e.printStackTrace();
                }
            }
        });
        pTextComponent.getActionMap().put(REDO_ACTION, new AbstractAction(REDO_ACTION) {
            public void actionPerformed(ActionEvent evt) {
                try {
                    if (undoMgr.canRedo()) {
                        undoMgr.redo();
                    }
                } catch (CannotRedoException e) {
                    e.printStackTrace();
                }
            }
        });

        // Create keyboard accelerators for undo/redo actions (Ctrl+Z/Ctrl+Y)
        pTextComponent.getInputMap().put(
            KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK), UNDO_ACTION);
        pTextComponent.getInputMap().put(
            KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_DOWN_MASK), REDO_ACTION);
    }
}