Class: Key

Properties:

Name	Type	Argument	Default	Description
callbacks	Array.<function()>			called when key is clicked/selected
scaleFactor	number	<optional>	1
parent	music21.keyboard.Keyboard | undefined
id	int			midi number associated with the key.
pitchObj	music21.pitch.Pitch | undefined
svgObj	SVGElement | undefined			SVG representing the drawing of the key
noteNameSvgObj	SVGElement | undefined			SVG representing the note name drawn on the key
keyStyle	string		''	css style information for the key
keyClass	string		''	css class information for the key ("keyboardkey" + this is the class)
width	number			width of key
height	number			height of key