PlotArea.set4QBgColor

Sets using 4 background plot area colors for 4 quadrants.

The first quadrant is the region defined by x > 0 and y > 0. The second quadrant is the region defined by x < 0 and y > 0. The third quadrant is the region defined by x < 0 and y < 0. The fourth quadrant is the region defined by x > 0 and y < 0. These 4 regions can be colored using 4 different background colors.

Argument	Default	Description
Q1Color	(Mandatory)	The background color to be used for the first quadrant.
Q2Color	(Mandatory)	The background color to be used for the second quadrant.
Q3Color	(Mandatory)	The background color to be used for the third quadrant.
Q4Color	(Mandatory)	The background color to be used for the fourth quadrant.
edgeColor	-1	he border color of the plot area. -1 means to use the default, which is LineColor. However, if the axes are configured in 4 quadrant mode (see XYChart.setAxisAtOrigin), the default will change to Transparent.