| /* |
| * 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.openapi.wm.impl; |
| |
| import org.jetbrains.annotations.NonNls; |
| |
| import java.awt.*; |
| import java.awt.event.ComponentAdapter; |
| import java.awt.event.ComponentEvent; |
| import java.beans.PropertyChangeEvent; |
| import java.beans.PropertyChangeListener; |
| |
| /** |
| * @author Anton Katilin |
| * @author Vladimir Kondratyev |
| */ |
| public abstract class VisibilityWatcher extends ComponentAdapter implements PropertyChangeListener{ |
| @NonNls protected static final String ANCESTOR_PROPERTY_NAME = "ancestor"; |
| |
| public final void componentHidden(final ComponentEvent e){ |
| visibilityChanged(); |
| } |
| |
| public final void componentShown(final ComponentEvent e){ |
| visibilityChanged(); |
| } |
| |
| public final void propertyChange(final PropertyChangeEvent e){ |
| if(ANCESTOR_PROPERTY_NAME.equals(e.getPropertyName())){ |
| final Component oldAncestor=(Component)e.getOldValue(); |
| deinstall(oldAncestor); |
| final Component newAncestor=(Component)e.getNewValue(); |
| install(newAncestor); |
| visibilityChanged(); |
| }else{ |
| throw new IllegalArgumentException("unknown propertyName: "+e.getPropertyName()); |
| } |
| } |
| |
| public final void install(Component component){ |
| while(component!=null){ |
| component.removePropertyChangeListener(ANCESTOR_PROPERTY_NAME,this); // it prevent double registering |
| component.addPropertyChangeListener(ANCESTOR_PROPERTY_NAME,this); |
| |
| component.removeComponentListener(this); // it prevent double registering |
| component.addComponentListener(this); |
| component=component.getParent(); |
| } |
| } |
| |
| public void deinstall(Component component){ |
| while(component!=null){ |
| component.removePropertyChangeListener(ANCESTOR_PROPERTY_NAME,this); |
| component.removeComponentListener(this); |
| component=component.getParent(); |
| } |
| } |
| |
| /** |
| * Invokes every time component changes its visibility. It means one of parent component |
| * change visibility or hierarchy is connected/disconnected to/from peer. |
| */ |
| public abstract void visibilityChanged(); |
| } |