/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999, 2000 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Ant" and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.tools.ant.gui.modules.edit;
import java.awt.BorderLayout;
import java.awt.Component;
import java.beans.BeanInfo;
import java.beans.Customizer;
import java.beans.Introspector;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.EventObject;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import org.apache.tools.ant.gui.acs.ACSElement;
import org.apache.tools.ant.gui.core.AntModule;
import org.apache.tools.ant.gui.core.AppContext;
import org.apache.tools.ant.gui.event.BusFilter;
import org.apache.tools.ant.gui.event.BusMember;
import org.apache.tools.ant.gui.event.ElementSelectionEvent;
import org.apache.tools.ant.gui.event.EventBus;
import org.apache.tools.ant.gui.event.ProjectClosedEvent;
/**
* Stub for a property editor.
*
* @version $Revision: 1.4 $
* @author Simeon H.K. Fitch
*/
public class PropertyEditor extends AntModule {
/** The editor for current bean.*/
private Customizer _customizer = null;
/** Container for the customizer. */
private JPanel _container = null;
/** Scroll area containing contents. */
private JScrollPane _scroller = null;
/** Property change forwarder. */
private PropertyChangeForwarder _forwarder = new PropertyChangeForwarder();
/**
* Default ctor.
*
*/
public PropertyEditor() {
}
/**
* Using the given AppContext, initialize the display.
*
* @param context Application context.
*/
public void contextualize(AppContext context) {
setContext(context);
context.getEventBus().addMember(EventBus.MONITORING, new Handler());
setLayout(new BorderLayout());
_container = new JPanel(new BorderLayout());
add(_scroller = new JScrollPane(_container));
}
/**
* Update the display for the current items.
*
* @param items Current items to display.
*/
private void updateDisplay(ACSElement[] items) {
if(_customizer != null) {
_customizer.removePropertyChangeListener(_forwarder);
_container.remove((Component)_customizer);
_customizer = null;
}
if(items != null && items.length > 0) {
// The last selection element is the the one the
// user most recently selected.
ACSElement item = items[items.length - 1];
try {
BeanInfo info = Introspector.getBeanInfo(item.getClass());
_customizer = (Customizer) info.getBeanDescriptor().
getCustomizerClass().newInstance();
_customizer.setObject(item);
_container.add(BorderLayout.CENTER, (Component) _customizer);
_customizer.addPropertyChangeListener(_forwarder);
}
catch(Exception ex) {
// XXX log me.
ex.printStackTrace();
}
}
_container.validate();
_container.repaint();
}
/** Class for handling project events. */
private class Handler implements BusMember {
private final Filter _filter = new Filter();
/**
* Get the filter to that is used to determine if an event should
* to to the member.
*
* @return Filter to use.
*/
public BusFilter getBusFilter() {
return _filter;
}
/**
* Called when an event is to be posted to the member.
*
* @param event Event to post.
* @return true if event should be propogated, false if
* it should be cancelled.
*/
public boolean eventPosted(EventObject event) {
if(event instanceof ProjectClosedEvent) {
updateDisplay(null);
}
else {
ElementSelectionEvent e = (ElementSelectionEvent) event;
ACSElement[] elements = e.getSelectedElements();
updateDisplay(elements);
}
return true;
}
}
/** Class providing filtering for project events. */
private static class Filter implements BusFilter {
/**
* Determines if the given event should be accepted.
*
* @param event Event to test.
* @return True if event should be given to BusMember, false otherwise.
*/
public boolean accept(EventObject event) {
return event instanceof ElementSelectionEvent ||
event instanceof ProjectClosedEvent;
}
}
/** Class for forwarding property change events to the event bus. */
private class PropertyChangeForwarder implements PropertyChangeListener {
public void propertyChange(PropertyChangeEvent e) {
getContext().getEventBus().postEvent(e);
}
}
}