/*
* Copyright (c) 2011 PonySDK
* Owners:
* Luciano Broussal <luciano.broussal AT gmail.com>
* Mathieu Barbier <mathieu.barbier AT gmail.com>
* Nicolas Ciaravola <nicolas.ciaravola.pro AT gmail.com>
*
* WebSite:
* http://code.google.com/p/pony-sdk/
*
* 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.ponysdk.ui.server.basic;
import java.util.Iterator;
import com.ponysdk.core.instruction.Add;
import com.ponysdk.core.instruction.Remove;
import com.ponysdk.core.stm.Txn;
import com.ponysdk.ui.terminal.Dictionnary.PROPERTY;
/**
* Abstract base class for panels that can contain multiple child widgets.
*/
public abstract class PComplexPanel extends PPanel {
private final PWidgetCollection children = new PWidgetCollection(this);
public void add(final PWidget... widgets) {
for (final PWidget w : widgets) {
insert(w, getChildren().size());
}
}
@Override
public void add(final PWidget child) {
insert(child, getChildren().size());
}
public void insert(final PWidget child, final int beforeIndex) {
assertNotMe(child);
child.removeFromParent();
getChildren().insert(child, beforeIndex);
adopt(child);
final Add add = new Add(child.getID(), getID());
add.put(PROPERTY.INDEX, beforeIndex);
Txn.get().getTxnContext().save(add);
}
@Override
public boolean remove(final PWidget w) {
if (w.getParent() != this) return false;
orphan(w);
if (getChildren().remove(w)) {
final Remove remove = new Remove(w.getID(), getID());
Txn.get().getTxnContext().save(remove);
return true;
} else {
return false;
}
}
public boolean remove(final int index) {
return remove(getWidget(index));
}
protected PWidgetCollection getChildren() {
return children;
}
public int getWidgetCount() {
return getChildren().size();
}
public PWidget getWidget(final int index) {
return getChildren().get(index);
}
public int getWidgetIndex(final PWidget child) {
return getChildren().indexOf(child);
}
@Override
public Iterator<PWidget> iterator() {
return getChildren().iterator();
}
void assertIsChild(final PWidget widget) {
if ((widget != null) && (widget.getParent() != this)) throw new IllegalStateException("The specified widget is not a child of this panel");
}
void assertNotMe(final PWidget widget) {
if (widget == this) throw new IllegalStateException("Cannot insert widget to itself");
}
}