Symphonary.NWGUI.Start_Clicked C# (CSharp) Method

        private void Start_Clicked(object sender, RoutedEventArgs e)
        {
            Instrument_Clicked(instrument);
            try {
                if (midiPlayer.IsPlaying) {
                    MessageBox.Show("The file is currently being played, please have it finish first.");
                    return;
                }

                if (i_Channel < 0) {
                    MessageBox.Show("Please select a channel to play first.");
                    return;
                }

                if (!midiPlayer.IsFinishedLoading) {
                    MessageBox.Show("Please wait for the MIDI file to finish loading");
                    return;
                }

                Stop.IsEnabled = true;
                Stop.Width = Double.NaN;
                Instruments.IsEnabled = false;
                Instruments.Width = 0;

                midiPlayer.PersistentChannel = i_Channel;

                score.ResetScore();

                InitializeCanvas();
                Background.Visibility = Visibility.Visible;
                ShowSubCanvas();
                muteSelectedChannel.Visibility = Visibility.Visible;
                muteSelectedChannel.IsChecked = !midiPlayer.PlayPersistentChannel;
                pause.Visibility = Visibility.Visible;
                pause.Header = "PAUSE";

                playDuration.Restart();
                CompositionTarget.Rendering += MoveCanvas;
                CompositionTarget.Rendering += CanvasNotesScheduledAdder;
                b_AnimationStarted = true;
                midiPlayer.StartPlaying();
                startTime = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;

            } catch (NullReferenceException ex) {
                MessageBox.Show(
                    "Please load a MIDI file first! (or some other weird error occured, so read the proceeding message)");
                MessageBox.Show(ex.ToString());
            }
        }