/**
* L2FProd.com Common Components 7.3 License.
*
* Copyright 2005-2007 L2FProd.com
*
* 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.l2fprod.common.swing;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
/**
* This class is used to create a multiple-exclusion scope for a set of
* JTaskPaneGroups. Creating a set of JTaskPaneGroups with the same
* GroupOfTaskPaneGroup object means that expanding one of those JTaskPaneGroups
* will collapse all other JTaskPaneGroups in the group.
*
* @author <a href="mailto:fred@L2FProd.com">Frederic Lavigne</a>
*/
public class GroupOfTaskPaneGroup implements PropertyChangeListener {
private JTaskPaneGroup selection;
/**
* Adds a <code>JTaskPaneGroup</code> to this group.
*
* @param taskpaneGroup
*/
public void add(JTaskPaneGroup taskpaneGroup) {
register(taskpaneGroup);
// if we have no selection
if (selection == null) {
// and if the taskpane is expanded
if (taskpaneGroup.isExpanded()) {
// then the selection becomes the taskpane
selection = taskpaneGroup;
}
} else {
// we have a selection, so this taskpane must be collapsed
taskpaneGroup.setExpanded(false);
}
maybeUpdateSelection(taskpaneGroup);
}
/**
* Removes a <code>JTaskPaneGroup</code> from this group.
*
* @param taskpaneGroup
*/
public void remove(JTaskPaneGroup taskpaneGroup) {
unregister(taskpaneGroup);
// if we are removing the currently selection taskpane, reset the selection
// to "null" otherwise the taskpane may get modified by us later.
if (selection == taskpaneGroup) {
selection = null;
}
}
public void propertyChange(PropertyChangeEvent event) {
// if a taskpane gets expanded, collapse the previously expanded one if any
JTaskPaneGroup taskpaneGroup = (JTaskPaneGroup) event.getSource();
maybeUpdateSelection(taskpaneGroup);
}
private void maybeUpdateSelection(JTaskPaneGroup taskpaneGroup) {
if (selection != taskpaneGroup && taskpaneGroup.isExpanded()) {
if (selection != null) {
selection.setExpanded(false);
}
selection = taskpaneGroup;
}
}
private void register(JTaskPaneGroup taskpaneGroup) {
taskpaneGroup.addPropertyChangeListener(JTaskPaneGroup.EXPANDED_CHANGED_KEY, this);
}
private void unregister(JTaskPaneGroup taskpaneGroup) {
taskpaneGroup.removePropertyChangeListener(JTaskPaneGroup.EXPANDED_CHANGED_KEY, this);
}
}