/* An editor for Ptolemy II objects.
Copyright (c) 1998-2006 The Regents of the University of California.
All rights reserved.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the above
copyright notice and the following two paragraphs appear in all copies
of this software.
IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
ENHANCEMENTS, OR MODIFICATIONS.
PT_COPYRIGHT_VERSION_2
COPYRIGHTENDKEY
*/
package ptolemy.actor.gui;
import java.awt.Component;
import java.awt.Window;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import javax.swing.BoxLayout;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import ptolemy.gui.CloseListener;
import ptolemy.kernel.util.NamedObj;
import ptolemy.kernel.util.Settable;
import ptolemy.moml.MoMLChangeRequest;
import ptolemy.util.StringUtilities;
//////////////////////////////////////////////////////////////////////////
//// Configurer
/**
This class is an editor for the user settable attributes of an object.
It may consist of more than one editor panel. If the object has
any attributes that are instances of EditorPaneFactory, then the
panes made by those factories are stacked vertically in this panel.
Otherwise, a static method of EditorPaneFactory is
used to construct a default editor.
<p>
The restore() method restores the values of the attributes of the
object to their values when this object was created. This can be used
in a modal dialog to implement a cancel button, which restores
the attribute values to those before the dialog was opened.
<p>
This class is created by an instance of the EditParametersDialog class
to handle the part of the dialog that edits the parameters.
@see EditorPaneFactory
@author Steve Neuendorffer and Edward A. Lee
@version $Id: Configurer.java,v 1.51 2006/08/21 23:09:46 cxh Exp $
@since Ptolemy II 0.4
@Pt.ProposedRating Yellow (eal)
@Pt.AcceptedRating Yellow (neuendor)
*/
public class Configurer extends JPanel implements CloseListener {
/** Construct a configurer for the specified object. This stores
* the current values of any Settable attributes of the given object,
* and then defers to any editor pane factories contained by
* the given object to populate this panel with widgets that
* edit the attributes of the given object. If there are no
* editor pane factories, then a default editor pane is created.
* @param object The object to configure.
*/
public Configurer(final NamedObj object) {
setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
_object = object;
// Record the original values so a restore can happen later.
_originalValues = new HashMap();
Iterator parameters = _object.attributeList(Settable.class).iterator();
while (parameters.hasNext()) {
Settable parameter = (Settable) parameters.next();
if (isVisible(_object, parameter)) {
_originalValues.put(parameter, parameter.getExpression());
}
}
boolean foundOne = false;
Iterator editors = object.attributeList(EditorPaneFactory.class)
.iterator();
while (editors.hasNext()) {
foundOne = true;
EditorPaneFactory editor = (EditorPaneFactory) editors.next();
Component pane = editor.createEditorPane();
add(pane);
// Inherit the background color from the container.
pane.setBackground(null);
if (pane instanceof CloseListener) {
_closeListeners.add(pane);
}
}
if (!foundOne) {
// There is no attribute of class EditorPaneFactory.
// We cannot create one because that would have to be done
// as a mutation, something that is very difficult to do
// while constructing a modal dialog. Synchronized interactions
// between the thread in which the manager performs mutations
// and the event dispatch thread prove to be very tricky,
// and likely lead to deadlock. Hence, instead, we use
// the static method of EditorPaneFactory.
Component pane = EditorPaneFactory.createEditorPane(object);
add(pane);
// Inherit the background color from the container.
pane.setBackground(null);
if (pane instanceof CloseListener) {
_closeListeners.add(pane);
}
}
}
///////////////////////////////////////////////////////////////////
//// public methods ////
/** Return true if the given settable should be visible in a
* configurer panel for the specified target. Any settable with
* visibility FULL or NOT_EDITABLE will be visible. If the target
* contains an attribute named "_expertMode", then any
* attribute with visibility EXPERT will also be visible.
* @param target The object to be configured.
* @param settable The object whose visibility is returned.
* @return True if settable is FULL or NOT_EDITABLE or True
* if the target has an _expertMode attribute and the settable
* is EXPERT. Otherwise, return false.
*/
public static boolean isVisible(NamedObj target, Settable settable) {
if ((settable.getVisibility() == Settable.FULL)
|| (settable.getVisibility() == Settable.NOT_EDITABLE)) {
return true;
}
if ((target.getAttribute("_expertMode") != null)
&& (settable.getVisibility() == Settable.EXPERT)) {
return true;
}
return false;
}
/** Request restoration of the user settable attribute values to what they
* were when this object was created. The actual restoration
* occurs later, in the UI thread, in order to allow all pending
* changes to the attribute values to be processed first. If the original
* values match the current values, then nothing is done.
*/
public void restore() {
// This is done in the UI thread in order to
// ensure that all pending UI events have been
// processed. In particular, some of these events
// may trigger notification of new attribute values,
// which must not be allowed to occur after this
// restore is done. In particular, the default
// attribute editor has lines where notification
// of updates occurs when the line loses focus.
// That notification occurs some time after the
// window is destroyed.
// FIXME: Unfortunately, this gets
// invoked before that notification occurs if the
// "X" is used to close the window. Swing bug?
SwingUtilities.invokeLater(new Runnable() {
public void run() {
// First check for changes.
Iterator parameters = _object.attributeList(Settable.class)
.iterator();
boolean hasChanges = false;
StringBuffer buffer = new StringBuffer("<group>\n");
while (parameters.hasNext()) {
Settable parameter = (Settable) parameters.next();
if (isVisible(_object, parameter)) {
String newValue = parameter.getExpression();
String oldValue = (String) _originalValues
.get(parameter);
if (!newValue.equals(oldValue)) {
hasChanges = true;
buffer.append("<property name=\"");
buffer.append(((NamedObj) parameter)
.getName(_object));
buffer.append("\" value=\"");
buffer.append(StringUtilities
.escapeForXML(oldValue));
buffer.append("\"/>\n");
}
}
}
buffer.append("</group>\n");
// If there are changes, then issue a change request.
// Use a MoMLChangeRequest so undo works... I.e., you can undo a cancel
// of a previous change.
if (hasChanges) {
MoMLChangeRequest request = new MoMLChangeRequest(this, // originator
_object, // context
buffer.toString(), // MoML code
null); // base
_object.requestChange(request);
}
}
});
}
/** Restore parameter values to their defaults.
*/
public void restoreToDefaults() {
// This is done in the UI thread in order to
// ensure that all pending UI events have been
// processed. In particular, some of these events
// may trigger notification of new attribute values,
// which must not be allowed to occur after this
// restore is done. In particular, the default
// attribute editor has lines where notification
// of updates occurs when the line loses focus.
// That notification occurs some time after the
// window is destroyed.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
Iterator parameters = _object.attributeList(Settable.class)
.iterator();
StringBuffer buffer = new StringBuffer("<group>\n");
final List parametersReset = new LinkedList();
while (parameters.hasNext()) {
Settable parameter = (Settable) parameters.next();
if (isVisible(_object, parameter)) {
String newValue = parameter.getExpression();
String defaultValue = parameter.getDefaultExpression();
if ((defaultValue != null)
&& !newValue.equals(defaultValue)) {
buffer.append("<property name=\"");
buffer.append(((NamedObj) parameter)
.getName(_object));
buffer.append("\" value=\"");
buffer.append(StringUtilities
.escapeForXML(defaultValue));
buffer.append("\"/>\n");
parametersReset.add(parameter);
}
}
}
buffer.append("</group>\n");
// If there are changes, then issue a change request.
// Use a MoMLChangeRequest so undo works... I.e., you can undo a cancel
// of a previous change.
if (parametersReset.size() > 0) {
MoMLChangeRequest request = new MoMLChangeRequest(this, // originator
_object, // context
buffer.toString(), // MoML code
null) { // base
protected void _execute() throws Exception {
super._execute();
// Reset the derived level, which has the side
// effect of marking the object not overridden.
Iterator parameters = parametersReset.iterator();
while (parameters.hasNext()) {
Settable parameter = (Settable) parameters
.next();
if (isVisible(_object, parameter)) {
int derivedLevel = ((NamedObj) parameter)
.getDerivedLevel();
((NamedObj) parameter)
.setDerivedLevel(derivedLevel);
}
}
}
};
_object.requestChange(request);
}
}
});
}
/** Notify any panels in this configurer that implement the
* CloseListener interface that the specified window has closed.
* The second argument, if non-null, gives the name of the button
* that was used to close the window.
* @param window The window that closed.
* @param button The name of the button that was used to close the window.
*/
public void windowClosed(Window window, String button) {
Iterator listeners = _closeListeners.iterator();
while (listeners.hasNext()) {
CloseListener listener = (CloseListener) listeners.next();
listener.windowClosed(window, button);
}
}
///////////////////////////////////////////////////////////////////
//// private variables ////
// A list of panels in this configurer that implement CloseListener,
// if there are any.
private List _closeListeners = new LinkedList();
// The object that this configurer configures.
private NamedObj _object;
// A record of the original values.
private HashMap _originalValues;
}