paint method

Implementation

@override
void paint(Canvas canvas, Size size) {
  screenHeight = size.height;
  screenWidth = size.width;

  pixelsPerOneCM = screenHeight / 16;
  pixelsPerOneMM = pixelsPerOneCM! / 10;

  leftOffsetStart = size.width * 0.07;
  topOffsetEnd = size.height * 0.9;
  drawingWidth = size.width * 0.93;
  drawingHeight = topOffsetEnd;

  graphGridMainLines = Paint()
    ..color = Colors.grey[400]!
    ..strokeWidth = pixelsPerOneMM! * 0.65;
  graphGridLines = Paint()
    ..color = Colors.grey[400]!
    ..strokeWidth = pixelsPerOneMM! * 0.40;
  graphGridSubLines = Paint()
    ..color = Colors.grey[400]!
    ..strokeWidth = pixelsPerOneMM! * 0.20;
  graphOutlines = Paint()
    ..color = Colors.black
    ..strokeWidth = pixelsPerOneMM! * .80;
  graphSafeZone = Paint()
    ..color = const Color.fromARGB(40, 100, 200, 0)
    ..strokeWidth = pixelsPerOneMM! * .40;
  graphUnSafeZone = Paint()
    ..color = const Color.fromARGB(40, 250, 30, 0)
    ..strokeWidth = pixelsPerOneMM! * .40;
  graphNoiseZone = Paint()
    ..color = const Color.fromARGB(100, 169, 169, 169)
    ..strokeWidth = pixelsPerOneMM! * .40;
  graphBpmLine = Paint()
    ..color = Colors.blue
    ..strokeWidth = pixelsPerOneMM! * .40;
  graphBpmLine2 = Paint()
    ..color = Colors.black54
    ..strokeWidth = pixelsPerOneMM! * .40;
  graphBaseLine = Paint()
    ..color = Colors.blueGrey
    ..strokeWidth = pixelsPerOneMM! * .50;

  Color mhrColor = const Color.fromRGBO(197, 11, 95, 1.0);//Color(0xFFEA62AB);
  graphMHRLine = Paint()
    ..color = mhrColor
    ..strokeWidth = pixelsPerOneMM! * .40;

  init(size);

  drawGraph(canvas);
}