Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * 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();
    }
}