Check if the stroke has been triggered during this frame.
Check if all keys or buttons required for the stroke are held down.
Check if the last item of this input stroke is done with a mouse
Get number of items in the stroke.
Get a copy of the input stroke with the last item removed, if any.
Check if the given item is triggered.
Check if the given is held down.
Check if the given item is done with a mouse.
Represents a key or button input combination.