| /* |
| * Copyright 2000-2011 JetBrains s.r.o. |
| * |
| * 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. |
| */ |
| package com.intellij.openapi.wm.impl; |
| |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.util.containers.ContainerUtil; |
| |
| import java.awt.*; |
| import java.awt.event.AWTEventListener; |
| import java.awt.event.KeyEvent; |
| import java.util.List; |
| |
| /** |
| * @author pegov |
| */ |
| public class AltStateManager implements AWTEventListener { |
| |
| private static final AltStateManager ourInstance; |
| |
| static { |
| ourInstance = new AltStateManager(); |
| if (!ApplicationManager.getApplication().isUnitTestMode()) { |
| Toolkit.getDefaultToolkit().addAWTEventListener(ourInstance, AWTEvent.KEY_EVENT_MASK); |
| } |
| } |
| |
| private final List<AltListener> myListeners = ContainerUtil.createLockFreeCopyOnWriteList(); |
| |
| public interface AltListener { |
| void altPressed(); |
| |
| void altReleased(); |
| } |
| |
| private AltStateManager() { |
| } |
| |
| public static AltStateManager getInstance() { |
| return ourInstance; |
| } |
| |
| public void addListener(AltListener listener) { |
| myListeners.add(listener); |
| } |
| |
| public void removeListener(AltListener listener) { |
| myListeners.remove(listener); |
| } |
| |
| @Override |
| public void eventDispatched(AWTEvent event) { |
| KeyEvent keyEvent = (KeyEvent)event; |
| if ((keyEvent.getKeyCode() == KeyEvent.VK_ALT)) { |
| if (keyEvent.getID() == KeyEvent.KEY_PRESSED) { |
| firePressed(); |
| } |
| else if (keyEvent.getID() == KeyEvent.KEY_RELEASED) { |
| fireReleased(); |
| } |
| } |
| } |
| |
| private void fireReleased() { |
| for (AltListener listener : myListeners) { |
| listener.altReleased(); |
| } |
| } |
| |
| private void firePressed() { |
| for (AltListener listener : myListeners) { |
| listener.altPressed(); |
| } |
| } |
| } |