Java JTextComponent installUndoManager(JTextComponent textComponent)

Description

install Undo Manager

License

Apache License

Declaration

public static void installUndoManager(JTextComponent textComponent) 

Method Source Code

//package com.java2s;
/*/*from  ww w  .  ja v a2  s  . c  o m*/
 * Copyright 2014 kohii.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.KeyEvent;

import javax.swing.AbstractAction;

import javax.swing.ActionMap;

import javax.swing.InputMap;

import javax.swing.KeyStroke;

import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;

import javax.swing.text.Document;
import javax.swing.text.JTextComponent;

import javax.swing.undo.UndoManager;

public class Main {
    public static void installUndoManager(JTextComponent textComponent) {
        installUndoManager(textComponent, new UndoManager());
    }

    @SuppressWarnings("serial")
    public static void installUndoManager(JTextComponent textComponent, final UndoManager undoManager) {

        Document doc = textComponent.getDocument();
        doc.addUndoableEditListener(new UndoableEditListener() {
            public void undoableEditHappened(UndoableEditEvent e) {
                undoManager.addEdit(e.getEdit());
            }
        });

        ActionMap am = textComponent.getActionMap();
        InputMap im = textComponent.getInputMap();
        am.put("undo", new AbstractAction("undo") {
            @Override
            public void actionPerformed(ActionEvent e) {
                undoManager.undo();
            }

            @Override
            public boolean isEnabled() {
                return undoManager.canUndo();
            }
        });
        im.put(KeyStroke.getKeyStroke(KeyEvent.VK_Z, getMenuShortcutKeyMask()), "undo");

        am.put("redo", new AbstractAction("redo") {
            @Override
            public void actionPerformed(ActionEvent e) {
                undoManager.redo();
            }

            @Override
            public boolean isEnabled() {
                return undoManager.canRedo();
            }
        });
        im.put(KeyStroke.getKeyStroke(KeyEvent.VK_Y, getMenuShortcutKeyMask()), "redo");
    }

    public static int getMenuShortcutKeyMask() {
        return Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
    }
}

Related

1. getStoredBackground(JTextComponent comp)
2. highlighterIsNext(JTextComponent textComponent, boolean forwards, Highlighter.Highlight highlight)
3. implyDisabled(final JCheckBox checked, final boolean checkedState, final JTextComponent changed)
4. inScrollPane(JTextComponent textComponent, boolean autoscroll)
5. installUi(JTextComponent txt)
6. isCompletelyVisible(final JTextComponent scrollableComponent, final int pos, final Rectangle visibleRect)
7. isEmpty(JTextComponent component)
8. isJavaContext(final JTextComponent component, final int offset, final boolean allowInStrings)
9. isNonWhitespaceBetween(JTextComponent editor, int iStart, int iEnd)