/*
* Sun Public License Notice
*
* The contents of this file are subject to the Sun Public License
* Version 1.0 (the "License"). You may not use this file except in
* compliance with the License. A copy of the License is available at
* http://www.sun.com/
*
* The Original Code is Forte for Java, Community Edition. The Initial
* Developer of the Original Code is Sun Microsystems, Inc. Portions
* Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
*/
package org.openide.explorer.view;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.io.*;
import java.beans.*;
import org.openide.explorer.*;
import org.openide.nodes.Node;
import javax.swing.*;
/** Explorer view based on a combo box.
*
* @author Jaroslav Tulach
*/
public class ChoiceView extends JComboBox implements Externalizable {
/** generated Serialized Version UID */
static final long serialVersionUID = 2522310031223476067L;
/** The local reference to the explorerManager. It is transient
* because it will be reset in initializeManager() after deserialization.*/
transient private ExplorerManager manager;
/** Listens on ExplorerManager. */
transient private PropertyIL iListener;
/** model to use */
transient private NodeListModel model;
/** Value of property showExploredContext. */
private boolean showExploredContext = true;
// init .................................................................................
/** Default constructor. */
public ChoiceView () {
super ();
initializeChoice ();
}
/** Initialize view. */
private void initializeChoice () {
setRenderer (new NodeRenderer ());
setModel (model = createModel ());
iListener = new PropertyIL();
}
/*
* Write view's state to output stream.
*/
public void writeExternal (ObjectOutput out) throws IOException {
out.writeObject (new Boolean (showExploredContext));
}
/*
* Reads view's state form output stream.
*/
public void readExternal (ObjectInput in) throws IOException, ClassNotFoundException {
showExploredContext = ((Boolean)in.readObject ()).booleanValue ();
}
//
// To override
//
/** Creates the model that this view should show.
*/
protected NodeListModel createModel () {
return new NodeListModel ();
}
// main methods .........................................................................
/** Set showing of explored contexts.
* @param b <code>true</code> to show the explored context, <code>false</code> the root context
*/
public void setShowExploredContext (boolean b) {
showExploredContext = b;
updateChoice();
}
/**
* Get explored context toggle.
* @return whether currently showing explored context (default <code>false</code>)
*/
public boolean getShowExploredContext () {
return showExploredContext;
}
// main methods .........................................................................
/* Initializes view.
*/
public void addNotify() {
manager = ExplorerManager.find (this);
manager.addVetoableChangeListener(iListener);
manager.addPropertyChangeListener(iListener);
updateChoice();
addItemListener (iListener);
super.addNotify ();
}
/* Deinitializes view.
*/
public void removeNotify() {
super.removeNotify ();
removeItemListener (iListener);
manager.removeVetoableChangeListener(iListener);
manager.removePropertyChangeListener(iListener);
}
private void updateSelection() {
Node[] nodes = manager.getSelectedNodes ();
if (nodes.length > 0) {
setSelectedItem (
VisualizerNode.getVisualizer (null, nodes[0])
);
} else {
setSelectedItem (VisualizerNode.EMPTY);
}
}
private void updateChoice() {
if (showExploredContext) {
model.setNode (manager.getExploredContext ());
} else {
model.setNode (manager.getRootContext ());
}
updateSelection ();
}
// innerclasses .........................................................................
/* The inner adaptor class for listening to the ExplorerManager's property and vetoable changes. */
final class PropertyIL extends Object
implements PropertyChangeListener, VetoableChangeListener,
java.awt.event.ItemListener {
public void vetoableChange(PropertyChangeEvent evt) throws PropertyVetoException {
if (ExplorerManager.PROP_SELECTED_NODES.equals(evt.getPropertyName())) {
Node[] nodes = (Node[])evt.getNewValue();
if (nodes.length > 1) {
throw new PropertyVetoException("", evt); // we do not allow multiple selection // NOI18N
}
}
}
public void propertyChange(PropertyChangeEvent evt) {
ChoiceView.this.removeItemListener (this);
try {
if (ExplorerManager.PROP_SELECTED_NODES.equals(evt.getPropertyName())) {
Node[] selectedNodes = (Node[])evt.getNewValue();
updateSelection();
return;
}
if (
!showExploredContext &&
ExplorerManager.PROP_ROOT_CONTEXT.equals(evt.getPropertyName())
) {
updateChoice();
return;
}
if (
showExploredContext &&
ExplorerManager.PROP_EXPLORED_CONTEXT.equals (evt.getPropertyName())
) {
updateChoice();
return;
}
} finally {
ChoiceView.this.addItemListener (this);
}
}
public void itemStateChanged(ItemEvent e) {
int s = getSelectedIndex ();
if (s < 0 || s >= getItemCount ()) {
return;
}
Node n = Visualizer.findNode (model.getElementAt (s));
manager.removeVetoableChangeListener(this);
manager.removePropertyChangeListener(this);
try {
manager.setSelectedNodes(new Node[] { n });
} catch (PropertyVetoException ex) {
updateChoice(); // no selection change allowed
} finally {
manager.addVetoableChangeListener(this);
manager.addPropertyChangeListener(this);
}
}
}
}
/*
* Log
* 7 Gandalf 1.6 1/13/00 Ian Formanek NOI18N
* 6 Gandalf 1.5 10/22/99 Ian Formanek NO SEMANTIC CHANGE - Sun
* Microsystems Copyright in File Comment
* 5 Gandalf 1.4 8/27/99 Jaroslav Tulach List model can display
* more levels at once.
* 4 Gandalf 1.3 8/27/99 Jaroslav Tulach New threading model &
* Children.
* 3 Gandalf 1.2 6/8/99 Ian Formanek ---- Package Change To
* org.openide ----
* 2 Gandalf 1.1 3/20/99 Jesse Glick [JavaDoc]
* 1 Gandalf 1.0 1/5/99 Ian Formanek
* $
* Beta Change History:
* 0 Tuborg 0.50 --/--/98 Jan Formanek SWITCHED TO NODES
* 0 Tuborg 0.60 --/--/98 Jan Formanek reflecting changes in explorer model
* 0 Tuborg 0.61 --/--/98 Jan Formanek reflecting changes in ExplorerView
*/