drawChart method
      
  
void
drawChart(
    
    
- CandleEntity lastPoint,
- CandleEntity curPoint,
- double lastX,
- double curX,
- Size size,
- Canvas canvas,
override
    Implementation
@override
void drawChart(CandleEntity lastPoint, CandleEntity curPoint, double lastX,
    double curX, Size size, Canvas canvas) {
  if (isLine) {
    drawPolyline(lastPoint.close, curPoint.close, canvas, lastX, curX);
  } else {
    drawCandle(curPoint, canvas, curX);
    if (state == MainState.MA) {
      drawMaLine(lastPoint, curPoint, canvas, lastX, curX);
    } else if (state == MainState.BOLL) {
      drawBollLine(lastPoint, curPoint, canvas, lastX, curX);
    }
  }
}