source: trunk/autoquest-jfcmonitor/src/main/java/de/ugoe/cs/autoquest/jfcmonitor/JFCTitleChangeListener.java @ 1269

//   Copyright 2012 Georg-August-Universität Göttingen, Germany
//
//   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 de.ugoe.cs.autoquest.jfcmonitor;

import java.awt.Component;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.accessibility.AccessibleContext;

import de.ugoe.cs.util.StringTools;

/**
 * <p>
 * Listener that listens on the name change of a component.
 * </p>
 * 
 * @author Fabian Glaser
 * @version 1.0
 */
public class JFCTitleChangeListener implements PropertyChangeListener {
        /**
         * <p>
         * Writer for logging events.
         * </p>
         */
        final private JFCMonitorOutputWriter outputWriter;

        final static private boolean CHECK_HIERARCHY = true;

        /**
         * <p>
         * Constructor. Creates a new JFCNameChangeListener with a given
         * {@link JFCMonitorOutputWriter}.
         * </p>
         * 
         * @param outputWriter
         */
        public JFCTitleChangeListener(JFCMonitorOutputWriter outputWriter) {
                this.outputWriter = outputWriter;
        }

        @Override
        public synchronized void propertyChange(PropertyChangeEvent evt) {
                String propertyName = evt.getPropertyName();
                Component component = null;
                int titleSource = JFCComponentTitleHierachy.SOURCE_NOT_KNOWN;

                // Set source component and title source
                if (propertyName.equals("AccessibleName")) {
                        AccessibleContext context = (AccessibleContext) evt.getSource();
                        component = (Component) context.getAccessibleParent();
                        titleSource = JFCComponentTitleHierachy.ACCESSIBLE_NAME;
                }

                if (propertyName.equals("name")) {
                        component = (Component) evt.getSource();
                        titleSource = JFCComponentTitleHierachy.NAME;
                }

                if (propertyName.equals("icon")) {
                        component = (Component) evt.getSource();
                        titleSource = JFCComponentTitleHierachy.ICON;
                }

                if (propertyName.equals("x") || propertyName.equals("y")) {
                        component = (Component) evt.getSource();
                        titleSource = JFCComponentTitleHierachy.POS;
                }

                if (component != null) {
                        JFCComponent jfcComponent = JFCComponent.find(component);
                        if (jfcComponent != null) {
                                int oldTitleSource = jfcComponent.getTitleSource();
                                Object newTitle = evt.getNewValue();
                                // We only print the title change message if the new title is as
                                // least as informative as the initial title
                                if ((!CHECK_HIERARCHY || oldTitleSource <= titleSource)) {
                                        StringBuilder builder = new StringBuilder();
                                        builder.append("<componentTitleChange hash=\"");
                                        builder.append(Integer.toHexString(component.hashCode()));
                                        builder.append("\" newTitle=\"" + newTitle);
                                        builder.append("\" titleSource=\"" + titleSource);
                                        builder.append("\" />" + StringTools.ENDLINE);
                                        outputWriter.write(builder.toString());
                                }
                        } else {
                                throw new AssertionError("Referenced component is not known.");
                        }
                }
        }

}