paint method
Draw itself and its children, according to the calculated
box.offset
Implementation
@override
void paint(Context context) {
super.paint(context);
if (data.isEmpty) {
return;
}
final grid = Chart.of(context).grid;
if (drawLine) {
_drawLine(context, grid, true);
context.canvas
..setStrokeColor(lineColor ?? color)
..setLineWidth(lineWidth)
..setLineCap(PdfLineCap.round)
..setLineJoin(PdfLineJoin.round)
..strokePath();
}
}