protected void OnPianoKeyPressed(PianoKey key)
{
if (PianoKeyPressed != null)
{
PianoKeyPressed(this, new PianoKeyPressedEventArgs(key));
}
}
private void DrawKeys()
{
LayoutRoot.Children.Clear();
double cursorX = 0;
for (int pitch = StartingMidiPitch; pitch < StartingMidiPitch + NumberOfKeys; pitch++)
{
PianoKeyType keyType = KeyTypes[pitch % 12];
double keyHeight = KeyHeight;
int zIndex = 0;
if (keyType == PianoKeyType.Small)
{
keyHeight = KeyHeight * 0.6d;
zIndex = 10;
}
PianoKey button = new PianoKey();
button.MidiPitch = pitch;
button.Width = keyType == PianoKeyType.Large ? KeyWidth : KeyWidth / 2;
button.Height = keyHeight;
button.Style = keyType == PianoKeyType.Large ? LargeKeyStyle : SmallKeyStyle;
button.Click += button_Click;
Canvas.SetLeft(button, pitch > StartingMidiPitch && keyType == PianoKeyType.Small ? cursorX - KeyWidth / 4 : cursorX);
Canvas.SetZIndex(button, zIndex);
LayoutRoot.Children.Add(button);
if (keyType == PianoKeyType.Large)
{
cursorX += KeyWidth;
}
}
}
void button_Click(object sender, RoutedEventArgs e)
{
PianoKey key = sender as PianoKey;
OnPianoKeyPressed(key);
if (PianoKeyPressedCommand == null)
{
return;
}
if (!PianoKeyPressedCommand.CanExecuteCommand(key))
{
return;
}
PianoKeyPressedCommand.ExecuteCommand(key);
}
public PianoKeyPressedEventArgs(PianoKey key)
{
Key = key;
}
