/// <summary>
/// Constructor.
/// </summary>
public MidiController()
{
// Get an instance to the event handler and subscribe to the SequencerPositionChanged event.
this.globalEventHandlerInstance = GlobalEventHandler.GetInstance();
// Selected MIDI device.
deviceSelectorString = MidiInPort.GetDeviceSelector();
// Activate device watcher and add callbacks for state changes.
deviceWatcher = DeviceInformation.CreateWatcher(deviceSelectorString);
deviceWatcher.Added += DeviceWatcher_Added;
deviceWatcher.Removed += DeviceWatcher_Removed;
deviceWatcher.Updated += DeviceWatcher_Updated;
deviceWatcher.EnumerationCompleted += DeviceWatcher_EnumerationCompleted;
// Subscribe to changed MIDI device.
this.globalEventHandlerInstance.SelectedMidiDeviceChanged += this.SelectedMidiDeviceChanged;
// Subscribe to event to learn MIDI messages.
this.globalEventHandlerInstance.LearnMidiEvent += this.LearnMidiEvent;
// Initialize MIDI event triggers.
for (int i = 0; i < Enum.GetNames(typeof(MidiEventType)).Length; i++)
{
learnedMidiTriggers[i] = new MidiEventTrigger();
}
}
/// <summary>
/// Load the MIDI event list from the settings.
/// </summary>
/// <param name="sender">Button the event was received from</param>
/// <param name="e">RoutedEventArgs</param>
private void LoadMidiSettings(object sender, RoutedEventArgs e)
{
// Iterate through all MIDI event types.
for (int i = 0; i < 12; i++)
{
// Create a new MidiEventTrigger object.
MidiEventTrigger tempMidiEventTrigger = new MidiEventTrigger();
// Set the type based on the current step.
tempMidiEventTrigger.type = (MidiEventType)i;
// Get trigger id from the storage.
tempMidiEventTrigger.id = (int)localSettings.Values[i.ToString()];
// Set the extracted data to the active MIDI triggers.
midiController.learnedMidiTriggers[i] = tempMidiEventTrigger;
// Find the relevant button for this type.
Button currentButtonElement = (Button)this.FindName("MidiEventType" + i.ToString());
if (tempMidiEventTrigger.id != 0)
{
// If this is an active trigger, highlight it.
currentButtonElement.Background = new SolidColorBrush(Color.FromArgb(255, 0, 71, 138));
}
else
{
// If not, use the standard color for the button.
currentButtonElement.Background = this.themeButtonColor;
}
}
// Done, set status text.
StatusTextControl.Text = "MIDI settings restored.";
}
/// <summary>
/// A new MIDI message was received.
/// Check if the message is relevant by checking the trained MIDI events
/// and if so, send a notification.
/// </summary>
/// <param name="sender">MIDI port that sent the message</param>
/// <param name="args">MidiMessageReceivedEventArgs</param>
private void MidiMessageReceived(MidiInPort sender, MidiMessageReceivedEventArgs args)
{
// Get the message as simple IMidiMessage.
IMidiMessage rawMidiMessage = (IMidiMessage)args.Message;
// Get the id and relevant value of the MIDI message.
int midiMessageID = this.ExtractMidiMessageID(rawMidiMessage);
int midiMessageValue = this.ExtractMidiMessageValue(rawMidiMessage);
// First check if we are in MIDI learn mode.
// If so, do not interpret the message, but instead use the message to associate
// its type with an event type.
if (this.midiLearningActive)
{
// Initialize new MIDI event.
MidiEventTrigger learnedMidiEvent = new MidiEventTrigger();
learnedMidiEvent.type = this.midiLearningType;
learnedMidiEvent.rawOriginalMessage = rawMidiMessage;
// Set the ID of the message.
learnedMidiEvent.id = midiMessageID;
// Store identified MIDI event.
this.learnedMidiTriggers[(int)this.midiLearningType] = learnedMidiEvent;
this.midiLearningActive = false;
// Notify that the event has been learned.
this.globalEventHandlerInstance.NotifyMidiEventLearned(this.midiLearningType);
// Do not continue to analyze the input.
return;
}
// Iterate through all types if the message was recognized.
for (int i = 0; i < Enum.GetNames(typeof(MidiEventType)).Length; i++)
{
if (this.learnedMidiTriggers[i].id == midiMessageID)
{
// Relevant event found, send the notification.
MidiEvent midiEvent = new MidiEvent();
midiEvent.type = this.learnedMidiTriggers[i].type;
midiEvent.value = midiMessageValue;
this.globalEventHandlerInstance.NotifyMidiEventReceived(midiEvent);
}
}
}
private void ResetMidiSettings(object sender, RoutedEventArgs e)
{
// Iterate through all MIDI event types.
for (int i = 0; i < 12; i++)
{
// Create a new MidiEventTrigger object and fill it with empty data.
MidiEventTrigger tempMidiEventTrigger = new MidiEventTrigger();
tempMidiEventTrigger.type = (MidiEventType)i;
tempMidiEventTrigger.id = 0;
// Set the extracted data to the active MIDI triggers.
midiController.learnedMidiTriggers[i] = tempMidiEventTrigger;
// Find the relevant button for this type and use the standard color.
Button currentButtonElement = (Button)this.FindName("MidiEventType" + i.ToString());
currentButtonElement.Background = this.themeButtonColor;
}
}
