/*
* Copyright 2000-2015 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;
import javax.swing.CellRendererPane;
import java.awt.*;
import java.awt.event.ContainerEvent;
import java.awt.event.ContainerListener;
/**
* @author Sergey.Malenkov
*/
final class MnemonicContainerListener implements ContainerListener {
void addTo(Component component) {
if (component == null || component instanceof CellRendererPane) {
return;
}
if (component instanceof Container) {
addTo((Container)component);
}
MnemonicWrapper.getWrapper(component);
}
void removeFrom(Component component) {
if (component instanceof Container) {
removeFrom((Container)component);
}
}
@Override
public void componentAdded(ContainerEvent event) {
addTo(event.getChild());
}
@Override
public void componentRemoved(ContainerEvent event) {
removeFrom(event.getChild());
}
private void addTo(Container container) {
if (!isAddedTo(container)) {
container.addContainerListener(this);
for (Component component : container.getComponents()) {
addTo(component);
}
}
}
private void removeFrom(Container container) {
if (isAddedTo(container)) {
container.removeContainerListener(this);
for (Component component : container.getComponents()) {
removeFrom(component);
}
}
}
private boolean isAddedTo(Container container) {
for (ContainerListener listener : container.getContainerListeners()) {
if (listener == this) {
return true;
}
}
return false;
}
}