onDraw method

@override void onDraw(Canvas canvas)

Implementation

@override
void onDraw(Canvas canvas) {
  if (props.backgroundColor != null) {
    paint.reset();
    paint.color = props.backgroundColor!;
    paint.style = PaintingStyle.fill;
    canvas.drawRect(areaBounds, paint);
  }
  for (var ele in _axisMap.entries) {
    ele.value.draw(canvas, paint);
  }
}