com.allen_sauer.gwt.voices.demo.client.DemoSoundPanel.java Source code

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Here is the source code for com.allen_sauer.gwt.voices.demo.client.DemoSoundPanel.java

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/*
 * Copyright 2009 Fred Sauer
 *
 * 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.allen_sauer.gwt.voices.demo.client;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.Random;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;

import com.allen_sauer.gwt.voices.client.handler.PlaybackCompleteEvent;
import com.allen_sauer.gwt.voices.client.handler.SoundHandler;
import com.allen_sauer.gwt.voices.client.handler.SoundLoadStateChangeEvent;

// CHECKSTYLE_JAVADOC_OFF
public class DemoSoundPanel extends Composite {
    public DemoSoundPanel(final ThirdPartySound thirdPartySound) {
        // use a horizontal panel to hold our content
        HorizontalPanel horizontalPanel = new HorizontalPanel();
        initWidget(horizontalPanel);

        // add a (temporarily disabled) play button
        final Button playButton = new Button("wait...");
        playButton.setEnabled(false);
        playButton.addStyleName("voices-button");
        horizontalPanel.add(playButton);

        final Button stopButton = new Button("wait...");
        stopButton.setEnabled(false);
        stopButton.addStyleName("voices-button");
        horizontalPanel.add(stopButton);

        // display a description of the sound next to the button
        horizontalPanel.add(new HTML(" " + thirdPartySound.toHTMLString()));

        // display a load state status
        final HTML loadStateHTML = new HTML();
        horizontalPanel.add(loadStateHTML);

        // enable the play button once the sound has loaded
        thirdPartySound.getSound().addEventHandler(new SoundHandler() {
            @Override
            public void onPlaybackComplete(PlaybackCompleteEvent event) {
            }

            @Override
            public void onSoundLoadStateChange(final SoundLoadStateChangeEvent event) {
                // simulate a slight variable delay for local development
                new Timer() {
                    @Override
                    public void run() {
                        loadStateHTML.setHTML("&nbsp; (<code>" + event.getLoadState().name() + "</code>)");
                        switch (event.getLoadState()) {
                        case LOAD_STATE_SUPPORTED_AND_READY:
                        case LOAD_STATE_SUPPORTED_NOT_READY:
                        case LOAD_STATE_SUPPORTED_MAYBE_READY:
                            playButton.setEnabled(true);
                            playButton.setText("play");
                            stopButton.setEnabled(true);
                            stopButton.setText("stop");
                            break;
                        case LOAD_STATE_NOT_SUPPORTED:
                            playButton.setText("(sound or plugin unavailable)");
                            break;
                        case LOAD_STATE_SUPPORT_NOT_KNOWN:
                            playButton.setEnabled(true);
                            playButton.setText("play (may not work)");
                            stopButton.setEnabled(true);
                            stopButton.setText("stop");
                            break;
                        case LOAD_STATE_UNINITIALIZED:
                        default:
                            throw new IllegalArgumentException("Unhandled state " + event.getLoadState());
                        }
                    }
                }.schedule(Random.nextInt(500) + 200);
            }
        });

        // play the sound when button is clicked
        playButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                thirdPartySound.getSound().play();
            }
        });

        stopButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                thirdPartySound.getSound().stop();
            }
        });
    }
}