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/*
* 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.uiDesigner;
import com.intellij.uiDesigner.radComponents.RadComponent;
import com.intellij.uiDesigner.radComponents.RadContainer;
import com.intellij.uiDesigner.radComponents.RadRootContainer;
import com.intellij.uiDesigner.designSurface.GuiEditor;
import org.jetbrains.annotations.NotNull;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
/**
* @author Anton Katilin
* @author Vladimir Kondratyev
*/
public abstract class SelectionWatcher {
private final MyPropertyChangeListener myChangeListener;
private RadRootContainer myRootContainer;
private final GuiEditor myEditor;
private final HierarchyChangeListener myHierarchyChangeListener;
public SelectionWatcher(final GuiEditor editor) {
myEditor = editor;
myChangeListener = new MyPropertyChangeListener();
myRootContainer = editor.getRootContainer();
install(myRootContainer);
myHierarchyChangeListener = new HierarchyChangeListener() {
public void hierarchyChanged() {
if (myRootContainer != editor.getRootContainer()) {
deinstall(myRootContainer);
myRootContainer = editor.getRootContainer();
install(myRootContainer);
}
}
};
editor.addHierarchyChangeListener(myHierarchyChangeListener);
}
public void dispose() {
deinstall(myRootContainer);
myEditor.removeHierarchyChangeListener(myHierarchyChangeListener);
}
private void install(@NotNull final RadComponent component){
component.addPropertyChangeListener(myChangeListener);
if(component instanceof RadContainer){
final RadContainer container = (RadContainer)component;
for(int i = container.getComponentCount() - 1; i>= 0; i--){
install(container.getComponent(i));
}
}
}
private void deinstall(@NotNull final RadComponent component){
component.removePropertyChangeListener(myChangeListener);
if(component instanceof RadContainer){
final RadContainer container = (RadContainer)component;
for(int i = container.getComponentCount() - 1; i>= 0; i--){
deinstall(container.getComponent(i));
}
}
}
protected abstract void selectionChanged(RadComponent component, boolean selected);
private final class MyPropertyChangeListener implements PropertyChangeListener{
public void propertyChange(final PropertyChangeEvent e) {
if(RadComponent.PROP_SELECTED.equals(e.getPropertyName())){
final Boolean selected = (Boolean)e.getNewValue();
selectionChanged((RadComponent)e.getSource(), selected.booleanValue());
}
else if(RadContainer.PROP_CHILDREN.equals(e.getPropertyName())){
final RadComponent[] oldChildren = (RadComponent[])e.getOldValue();
for(int i = oldChildren.length - 1; i >= 0; i--){
deinstall(oldChildren[i]);
}
final RadComponent[] newChildren = (RadComponent[])e.getNewValue();
for(int i = newChildren.length - 1; i >= 0; i--){
install(newChildren[i]);
}
}
}
}
}
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