SurfaceChart.addSurfaceZone

void addSurfaceZone(double x1, double y1, double x2, double y2, int fillColor, int edgeColor = Chart::Transparent , int edgeWidth = 1);

Argument	Default	Description
x1	(Mandatory)	The x data coordinate for the first corner of the rectangle.
y1	(Mandatory)	The y data coordinate for the first corner of the rectangle.
x2	(Mandatory)	The x data coordinate for the corner opposite to the first corner.
y2	(Mandatory)	The y data coordinate for the corner opposite to the first corner.
fillColor	(Mandatory)	The fill color of the rectangle.
edgeColor	Transparent	The border color of the rectangle.
edgeWidth	1	The border width in pixels.