| /* |
| * Copyright 2000-2009 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.util.ui; |
| |
| import com.intellij.openapi.Disposable; |
| |
| import javax.swing.*; |
| import java.awt.*; |
| import java.awt.event.AWTEventListener; |
| import java.awt.event.FocusEvent; |
| |
| public abstract class ChildFocusWatcher implements AWTEventListener, Disposable { |
| private final JComponent myParent; |
| |
| public ChildFocusWatcher(JComponent parent) { |
| myParent = parent; |
| Toolkit.getDefaultToolkit().addAWTEventListener(this, FocusEvent.FOCUS_EVENT_MASK); |
| } |
| |
| public void eventDispatched(final AWTEvent event) { |
| if (event instanceof FocusEvent) { |
| final FocusEvent fe = (FocusEvent)event; |
| final Component component = fe.getComponent(); |
| if (component == null) return; |
| if (!SwingUtilities.isDescendingFrom(component, myParent)) return; |
| |
| if (fe.getID() == FocusEvent.FOCUS_GAINED) { |
| onFocusGained(fe); |
| } else if (fe.getID() == FocusEvent.FOCUS_LAST) { |
| onFocusLost(fe); |
| } |
| } |
| } |
| |
| public void dispose() { |
| Toolkit.getDefaultToolkit().removeAWTEventListener(this); |
| } |
| |
| protected abstract void onFocusGained(FocusEvent event); |
| protected abstract void onFocusLost(FocusEvent event); |
| } |