cc.kune.gadgetsample.client.KuneGadgetSampleMainPanel.java Source code

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Here is the source code for cc.kune.gadgetsample.client.KuneGadgetSampleMainPanel.java

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/*
 *
 * Copyright (C) 2007-2015 Licensed to the Comunes Association (CA) under
 * one or more contributor license agreements (see COPYRIGHT for details).
 * The CA licenses this file to you under the GNU Affero General Public
 * License version 3, (the "License"); you may not use this file except in
 * compliance with the License. This file is part of kune.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package cc.kune.gadgetsample.client;

import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.inject.Inject;
import com.google.web.bindery.event.shared.EventBus;
import com.thezukunft.wave.connector.ModeChangeEvent;
import com.thezukunft.wave.connector.ModeChangeEventHandler;
import com.thezukunft.wave.connector.StateUpdateEvent;
import com.thezukunft.wave.connector.StateUpdateEventHandler;
import com.thezukunft.wave.connector.Wave;

// TODO: Auto-generated Javadoc
/**
 * The Class KuneGadgetSampleMainPanel is a simple panel with a button that
 * update its text when you click in the button.
 *
 * @author vjrj@ourproject.org (Vicente J. Ruiz Jurado)
 */
public class KuneGadgetSampleMainPanel extends Composite {

    /** The Constant AVATAR_SIZE. */
    private static final String AVATAR_SIZE = "50px";

    /** The Constant LOCK. */
    private static final String LOCK = "LOCK_KEY";

    /** The messages. */
    private final KuneGadgetSampleMessages messages;

    /**
     * Instantiates a new kune gadget sample main panel. We use gin to inject the
     * dependencies.
     *
     * @param eventBus
     *          the event bus
     * @param wave
     *          the wave
     * @param gadgetMessages
     *          the gadget messages
     */
    @Inject
    public KuneGadgetSampleMainPanel(final EventBus eventBus, final Wave wave,
            final KuneGadgetSampleMessages gadgetMessages) {
        this.messages = gadgetMessages;
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
            // We run this deferred, at the end of the gadget load
            @Override
            public void execute() {

                final Image avatar = new Image();
                avatar.setSize(AVATAR_SIZE, AVATAR_SIZE);
                avatar.setTitle(wave.getViewer().getDisplayName());
                avatar.setUrl(wave.getViewer().getThumbnailUrl());

                final boolean lockStatus = getLockStatus(wave);
                final Button btn = new Button(getBtnText(lockStatus));

                btn.addClickHandler(new ClickHandler() {
                    @Override
                    public void onClick(final ClickEvent event) {
                        final Boolean nextStatus = !getLockStatus(wave);
                        // We update the status of key LOCK to the inverse of the current
                        // status
                        wave.getState().submitValue(LOCK, nextStatus.toString());
                    }
                });
                final VerticalPanel vp = new VerticalPanel();
                vp.add(avatar);
                vp.add(btn);
                initWidget(vp);
                eventBus.addHandler(StateUpdateEvent.TYPE, new StateUpdateEventHandler() {
                    @Override
                    public void onUpdate(final StateUpdateEvent event) {
                        // When the status changes we just update the text of the button
                        btn.setText(getBtnText(Boolean.valueOf(event.getState().get(LOCK))));
                    }
                });
                eventBus.addHandler(ModeChangeEvent.TYPE, new ModeChangeEventHandler() {
                    @Override
                    public void onUpdate(final ModeChangeEvent event) {
                        // See the modes in
                        // http://www.waveprotocol.org/wave-apis/google-wave-gadgets-api/reference
                        // EDIT, VIEW, PLAYBACK, etc
                        if (wave.isPlayback()) {
                            // Do something
                        } else {
                            // Do other thing
                        }
                    }
                });

            }

            private Boolean getLockStatus(final Wave wave) {
                return Boolean.parseBoolean(wave.getState().get(LOCK));
            }
        });
    }

    /**
     * Calculate the button text.
     *
     * @param lockStatus
     *          the lock status
     * @return the btn text
     */
    protected String getBtnText(final Boolean lockStatus) {
        return lockStatus ? messages.unlock() : messages.lock();
    }
}