draw method

  1. @override
void draw(
  1. Canvas canvas,
  2. Size size,
  3. double scaleX,
  4. double scrollX,
  5. double getX(
    1. double
    ),
  6. double getY(
    1. double
    ),
)
override

Implementation

@override
void draw(Canvas canvas, Size size, double scaleX, double scrollX,
    double Function(double) getX, double Function(double) getY) {
  if (centerPoint == null) return;

  final paint = Paint()
    ..color = color
    ..strokeWidth = strokeWidth
    ..style = PaintingStyle.stroke;

  // 绘制垂直线
  canvas.drawLine(
    Offset(centerPoint!.dx, 0),
    Offset(centerPoint!.dx, size.height),
    paint,
  );

  // 绘制水平线
  canvas.drawLine(
    Offset(0, centerPoint!.dy),
    Offset(size.width, centerPoint!.dy),
    paint,
  );
}