addPrimitive

Adds a graphics primitive item to the internal list.

Parameter	Description
type	The following values have special meanings when used with a signature object: who Text in Data will also be used as name of signatory. why Text in Data will also be used as reason for signing. when Reserved for future use (Can be null or an empty string)
x, y	Position of the top left corner of the object on the pad display. Value can either be absolute position in pixels, or one of the strings: x: "left", "right", "centre" y: "top", "middle", "bottom"
data	Text to display.

Return values
The added Object if success or null if there is some error.