void SendMessageCommand_CanExecuteChanged(object sender, EventArgs e)
{
var sendMessageButton = ApplicationBar.Buttons[0] as IApplicationBarMenuItem;
if (sendMessageButton != null && SendMessageCommand != null)
{
sendMessageButton.IsEnabled = SendMessageCommand.CanExecute(null);
}
}
private void PreviewKeyDown(KeyEventArgs e)
{
if (e.Key == Key.Enter &&
SendMessageCommand.CanExecute(null))
{
SendMessageCommand.Execute(null);
LocalChatState = ChatStateEvent.Paused;
}
else if (e.Key == Key.Delete || e.Key == Key.Back)
{
LocalChatState = ChatStateEvent.Deleting;
}
else
{
LocalChatState = ChatStateEvent.Composing;
}
}