Sets the dial type (background shape)
This controls the shape of the dial background. Use one of the constants:
DIALTYPE_PIE, DIALTYPE_CIRCLE, or DIALTYPE_CHORD.
Parameters: type - - dial type
Sets the flag that controls whether or not a rectangular border is drawn around the plot area.
Note: it looks like the true setting needs some work to provide some insets
Parameters: draw - - The flag