onKeyDown()

Set up a function to call when a key is pressed down.

polyline.onKeyDown(action)

Holding a key down may call the function repeatedly, at the keyboard's repeat rate.

Parameters

polyline.onKeyDown(action)

Parameter	Type	Default	Description
action	function	required	The function to call; it receives one parameter, the virtual key code as an int, for example VK_SHIFT or VK_A.