public PianoPage()
{
this.InitializeComponent();
// Setup our device watchers for input and output MIDI devices.
// Let's us know if devices are connected/disconnected while we're running
// (And hopefully catches these gracefully so that we don't crash!)
inputDeviceWatcher = new MidiDeviceWatcher(MidiInPort.GetDeviceSelector(), midiInPortComboBox, Dispatcher);
inputDeviceWatcher.StartWatcher();
outputDeviceWatcher = new MidiDeviceWatcher(MidiOutPort.GetDeviceSelector(), midiOutPortComboBox, Dispatcher);
outputDeviceWatcher.StartWatcher();
// Helper class to take care of MIDI Control messages, set it up here with the sliders
msgHelper = new ControlMessageHelper(KB, SliderPitch, SliderMod, SliderVolume, SliderPan, Dispatcher);
// Register Suspending to clean up any connections we have
Application.Current.Suspending += Current_Suspending;
// Register event handlers for KeyTapped and KeyReleased
// (These events only occur when user taps/clicks on keys on screen)
KB.K_KeyTapped += KB_K_KeyTapped;
KB.K_KeyReleased += KB_K_KeyReleased;
// Wait until page has finished loading before doing some UI/layout changes
Loaded += PianoPage_Loaded;
}
// Called when app is suspending
private void Current_Suspending(object sender, Windows.ApplicationModel.SuspendingEventArgs e)
{
// Clean up out watchers
inputDeviceWatcher.StopWatcher();
inputDeviceWatcher = null;
outputDeviceWatcher.StopWatcher();
outputDeviceWatcher = null;
// Remove EventHandlers and try dispose of input & output ports
try
{
midiInPort.MessageReceived -= MidiInPort_MessageReceived;
midiInPort.Dispose();
midiInPort = null;
}
catch
{
}
try
{
midiOutPort.Dispose();
midiOutPort = null;
}
catch
{
}
}