using System.Speech.Recognition;

namespace Douban
{
public partial class MainWindow : Window
{
SpeechRecognizer speechRecognizer;
public MainWindow()
{
InitializeComponent();
// if (Properties.Settings.Default.EnableSpeech)
speechRecognizer = new SpeechRecognizer();
}

private void window_Loaded(object sender, RoutedEventArgs e)
{
// if(Properties.Settings.Default.EnableSpeech)
VoiceCommand();
}

private void VoiceCommand()
{
RegisterVoiceCommand(VoiceCommand_Close, "退出");
RegisterVoiceCommand(VoiceCommand_Next, "下一首");
RegisterVoiceCommand(VoiceCommand_Minimize, "最小化");
RegisterVoiceCommand(VoiceCommand_Restore, "恢复");

RegisterVoiceCommand(VoiceCommand_Pause, "暂停");
RegisterVoiceCommand(VoiceCommand_Resume, "播放");
}

private void VoiceCommand_Resume(object sender, EventArgs e)
{
if (mediaPlayer.MediaState != MediaState.Play)
{
if (mediaPlayer.MediaUri != null)
{
mediaPlayer.Play();
pnlPlayer.SetPlayerStatus(true);
}
}
}

private void VoiceCommand_Pause(object sender, EventArgs e)
{
if (mediaPlayer.MediaState == MediaState.Play)
{
mediaPlayer.Pause();
pnlPlayer.SetPlayerStatus(false);
}
}

private void VoiceCommand_Close(object sender, EventArgs e)
{
this.Close();
}

private void VoiceCommand_Next(object sender, EventArgs e)
{

}

private void VoiceCommand_Minimize(object sender, EventArgs e)
{
this.WindowState = WindowState.Minimized;
}

private void VoiceCommand_Restore(object sender, EventArgs e)
{
this.WindowState = WindowState.Normal;
}

private void RegisterVoiceCommand(EventHandler Callback, params string[] Args)
{
Choices choices = new Choices();
foreach (string arg in Args)
{
choices.Add(arg);
}
Grammar grammar = new Grammar(new GrammarBuilder(choices));

grammar.SpeechRecognized += delegate(object sender, SpeechRecognizedEventArgs e)
{
EventHandler eventHandler = new EventHandler(Callback);
Dispatcher.BeginInvoke(eventHandler, sender, e);
};

speechRecognizer.LoadGrammarAsync(grammar);
}