com.google.gwt.sample.dynatablemvp.client.widgets.NameLabel.java Source code

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Here is the source code for com.google.gwt.sample.dynatablemvp.client.widgets.NameLabel.java

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/*
 * Copyright 2010 Google Inc.
 * 
 * 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.google.gwt.sample.dynatablemvp.client.widgets;

import java.util.logging.Logger;

import com.google.gwt.editor.client.EditorDelegate;
import com.google.gwt.editor.client.ValueAwareEditor;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.sample.dynatablemvp.client.event.EditPersonEvent;
import com.google.gwt.sample.dynatablemvp.shared.PersonProxy;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Label;
import com.google.web.bindery.event.shared.HandlerRegistration;

/**
 * This NameLabel uses the EditorDelegate to receive notifications on updates to
 * the displayed object.
 */
public class NameLabel extends Composite implements ValueAwareEditor<PersonProxy> {
    /**
     * Many of the GWT UI widgets that implement TakesValue also implement
     * IsEditor and are directly usable as sub-Editors.
     */
    private static final Logger logger = Logger.getLogger(NameLabel.class.getName());

    final Label nameEditor = new Label();
    private PersonProxy person;
    private HandlerRegistration subscription;

    public NameLabel() {
        this(null);
    }

    public NameLabel(final HandlerManager eventBus) {
        initWidget(nameEditor);

        if (eventBus != null) {
            nameEditor.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    eventBus.fireEvent(new EditPersonEvent(person));
                }
            });
        }
    }

    public void flush() {
        // No-op
    }

    public void onPropertyChange(String... paths) {
        logger.fine("onPropertyChange:");
        for (String p : paths)
            logger.fine(p);
    }

    public void setDelegate(EditorDelegate<PersonProxy> delegate) {
        if (subscription != null) {
            subscription.removeHandler();
        }
        subscription = delegate.subscribe();
    }

    public void setValue(PersonProxy value) {
        person = value;
    }

    /**
     * Unhook event notifications when being permanently disposed of by
     * FavoritesWidget.
     */
    public void cancelSubscription() {
        if (subscription != null) {
            subscription.removeHandler();
        }
    }
}