ChartProperties chartProperties= this.getChartProperties();
GradientPaint paint= new GradientPaint( 250, 0, Color.white,
250, 800, new Color( 0, 255, 255, 220 ) );
chartProperties.setBackgroundPaint( paint );
AxisProperties axisProperties= new AxisProperties();
axisProperties.setXAxisLabelsAreVertical( true );
LegendProperties legendProperties= new LegendProperties();
AxisChart axisChart= new AxisChart( this.dataSeries, chartProperties, axisProperties, legendProperties, AxisChartsGuide.width, AxisChartsGuide.height );
super.exportImage( axisChart, "backgroundPaint" );