paint method

  1. @override
void paint(
  1. Canvas canvas,
  2. Size size
)
override

Called whenever the object needs to paint. The given Canvas has its coordinate space configured such that the origin is at the top left of the box. The area of the box is the size of the size argument.

Paint operations should remain inside the given area. Graphical operations outside the bounds may be silently ignored, clipped, or not clipped. It may sometimes be difficult to guarantee that a certain operation is inside the bounds (e.g., drawing a rectangle whose size is determined by user inputs). In that case, consider calling Canvas.clipRect at the beginning of paint so everything that follows will be guaranteed to only draw within the clipped area.

Implementations should be wary of correctly pairing any calls to Canvas.save/Canvas.saveLayer and Canvas.restore, otherwise all subsequent painting on this canvas may be affected, with potentially hilarious but confusing results.

To paint text on a Canvas, use a TextPainter.

To paint an image on a Canvas:

  1. Obtain an ImageStream, for example by calling ImageProvider.resolve on an AssetImage or NetworkImage object.

  2. Whenever the ImageStream's underlying ImageInfo object changes (see ImageStream.addListener), create a new instance of your custom paint delegate, giving it the new ImageInfo object.

  3. In your delegate's paint method, call the Canvas.drawImage, Canvas.drawImageRect, or Canvas.drawImageNine methods to paint the ImageInfo.image object, applying the ImageInfo.scale value to obtain the correct rendering size.

Implementation

@override
void paint(Canvas canvas, Size size) {
  final scaleX = size.width / 20.0000007050292;
  final scaleY = size.height / 20.0000007050292;
  final scale = math.min(scaleX, scaleY);

  final translationX = (size.width - 20.0000007050292 * scale) / 2 - 2.0 * scale;
  final translationY = (size.height - 20.0000007050292 * scale) / 2 - 2.0 * scale;

  final path = Path();
  final paint = Paint()..color = color;

  path.moveTo(
    15.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.cubicTo(
    14.447715250169207 * scale + translationX,
    17.0 * scale + translationY,
    14.0 * scale + translationX,
    17.447715250169207 * scale + translationY,
    14.0 * scale + translationX,
    18.0 * scale + translationY,
  );

  path.cubicTo(
    14.0 * scale + translationX,
    18.552284749830793 * scale + translationY,
    14.447715250169207 * scale + translationX,
    19.0 * scale + translationY,
    15.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.cubicTo(
    15.552284749830793 * scale + translationX,
    19.0 * scale + translationY,
    16.0 * scale + translationX,
    18.552284749830793 * scale + translationY,
    16.0 * scale + translationX,
    18.0 * scale + translationY,
  );

  path.cubicTo(
    16.0 * scale + translationX,
    17.447715250169207 * scale + translationY,
    15.552284749830793 * scale + translationX,
    17.0 * scale + translationY,
    15.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    9.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.lineTo(
    6.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.cubicTo(
    5.447715250169207 * scale + translationX,
    17.0 * scale + translationY,
    5.0 * scale + translationX,
    17.447715250169207 * scale + translationY,
    5.0 * scale + translationX,
    18.0 * scale + translationY,
  );

  path.cubicTo(
    5.0 * scale + translationX,
    18.552284749830793 * scale + translationY,
    5.447715250169207 * scale + translationX,
    19.0 * scale + translationY,
    6.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.lineTo(
    9.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.cubicTo(
    9.552284749830793 * scale + translationX,
    19.0 * scale + translationY,
    10.0 * scale + translationX,
    18.552284749830793 * scale + translationY,
    10.0 * scale + translationX,
    18.0 * scale + translationY,
  );

  path.cubicTo(
    10.0 * scale + translationX,
    17.447715250169207 * scale + translationY,
    9.552284749830793 * scale + translationX,
    17.0 * scale + translationY,
    9.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    18.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.cubicTo(
    17.447715250169207 * scale + translationX,
    17.0 * scale + translationY,
    17.0 * scale + translationX,
    17.447715250169207 * scale + translationY,
    17.0 * scale + translationX,
    18.0 * scale + translationY,
  );

  path.cubicTo(
    17.0 * scale + translationX,
    18.552284749830793 * scale + translationY,
    17.447715250169207 * scale + translationX,
    19.0 * scale + translationY,
    18.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.cubicTo(
    18.552284749830793 * scale + translationX,
    19.0 * scale + translationY,
    19.0 * scale + translationX,
    18.552284749830793 * scale + translationY,
    19.0 * scale + translationX,
    18.0 * scale + translationY,
  );

  path.cubicTo(
    19.0 * scale + translationX,
    17.447715250169207 * scale + translationY,
    18.552284749830793 * scale + translationX,
    17.0 * scale + translationY,
    18.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    15.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    14.447715250169207 * scale + translationX,
    11.0 * scale + translationY,
    14.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    14.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    14.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    14.447715250169207 * scale + translationX,
    13.0 * scale + translationY,
    15.0 * scale + translationX,
    13.0 * scale + translationY,
  );

  path.cubicTo(
    15.552284749830793 * scale + translationX,
    13.0 * scale + translationY,
    16.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    16.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    16.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    15.552284749830793 * scale + translationX,
    11.0 * scale + translationY,
    15.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    9.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.lineTo(
    6.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    5.447715250169207 * scale + translationX,
    11.0 * scale + translationY,
    5.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    5.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    5.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    5.447715250169207 * scale + translationX,
    13.0 * scale + translationY,
    6.0 * scale + translationX,
    13.0 * scale + translationY,
  );

  path.lineTo(
    9.0 * scale + translationX,
    13.0 * scale + translationY,
  );

  path.cubicTo(
    9.552284749830793 * scale + translationX,
    13.0 * scale + translationY,
    10.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    10.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    10.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    9.552284749830793 * scale + translationX,
    11.0 * scale + translationY,
    9.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    18.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    17.447715250169207 * scale + translationX,
    5.0 * scale + translationY,
    17.0 * scale + translationX,
    5.447715250169207 * scale + translationY,
    17.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.cubicTo(
    17.0 * scale + translationX,
    6.552284749830793 * scale + translationY,
    17.447715250169207 * scale + translationX,
    7.0 * scale + translationY,
    18.0 * scale + translationX,
    7.0 * scale + translationY,
  );

  path.cubicTo(
    18.552284749830793 * scale + translationX,
    7.0 * scale + translationY,
    19.0 * scale + translationX,
    6.552284749830793 * scale + translationY,
    19.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.cubicTo(
    19.0 * scale + translationX,
    5.447715250169207 * scale + translationY,
    18.552284749830793 * scale + translationX,
    5.0 * scale + translationY,
    18.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    18.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    17.447715250169207 * scale + translationX,
    11.0 * scale + translationY,
    17.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    17.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    17.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    17.447715250169207 * scale + translationX,
    13.0 * scale + translationY,
    18.0 * scale + translationX,
    13.0 * scale + translationY,
  );

  path.cubicTo(
    18.552284749830793 * scale + translationX,
    13.0 * scale + translationY,
    19.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    19.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    19.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    18.552284749830793 * scale + translationX,
    11.0 * scale + translationY,
    18.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    22.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    22.0000007050292 * scale + translationX,
    3.343145829688047 * scale + translationY,
    20.65685488556769 * scale + translationX,
    2.0000000102265383 * scale + translationY,
    19.000000566244125 * scale + translationX,
    2.0000000596046448 * scale + translationY,
  );

  path.lineTo(
    5.0 * scale + translationX,
    2.0 * scale + translationY,
  );

  path.cubicTo(
    3.343145829688046 * scale + translationX,
    2.000000010226537 * scale + translationY,
    2.0000000102265374 * scale + translationX,
    3.343145829688045 * scale + translationY,
    2.0000000596046448 * scale + translationX,
    5.000000149011611 * scale + translationY,
  );

  path.lineTo(
    2.0 * scale + translationX,
    7.0 * scale + translationY,
  );

  path.cubicTo(
    2.004410663178936 * scale + translationX,
    7.74005486333205 * scale + translationY,
    2.2822109326832165 * scale + translationX,
    8.45236324667636 * scale + translationY,
    2.7800000828504565 * scale + translationX,
    9.000000268220901 * scale + translationY,
  );

  path.cubicTo(
    2.2822109326832165 * scale + translationX,
    9.547637289765444 * scale + translationY,
    2.004410663178936 * scale + translationX,
    10.259945673109753 * scale + translationY,
    2.0000000596046448 * scale + translationX,
    11.000000327825546 * scale + translationY,
  );

  path.lineTo(
    2.0 * scale + translationX,
    13.0 * scale + translationY,
  );

  path.cubicTo(
    2.004410663178936 * scale + translationX,
    13.740055042145983 * scale + translationY,
    2.2822109326832165 * scale + translationX,
    14.452363425490294 * scale + translationY,
    2.7800000828504565 * scale + translationX,
    15.000000447034836 * scale + translationY,
  );

  path.cubicTo(
    2.2822109326832165 * scale + translationX,
    15.547637468579378 * scale + translationY,
    2.004410663178936 * scale + translationX,
    16.25994585192369 * scale + translationY,
    2.0000000596046448 * scale + translationX,
    17.00000050663948 * scale + translationY,
  );

  path.lineTo(
    2.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.cubicTo(
    2.000000010226538 * scale + translationX,
    20.65685488556769 * scale + translationY,
    3.3431458296880447 * scale + translationX,
    22.0000007050292 * scale + translationY,
    5.00000014901161 * scale + translationX,
    22.000000655651093 * scale + translationY,
  );

  path.lineTo(
    19.0 * scale + translationX,
    22.0 * scale + translationY,
  );

  path.cubicTo(
    20.65685488556769 * scale + translationX,
    22.000000705029198 * scale + translationY,
    22.0000007050292 * scale + translationX,
    20.65685488556769 * scale + translationY,
    22.000000655651093 * scale + translationX,
    19.000000566244125 * scale + translationY,
  );

  path.lineTo(
    22.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.cubicTo(
    21.9955900520768 * scale + translationX,
    16.25994585192369 * scale + translationY,
    21.71778978257252 * scale + translationX,
    15.547637468579378 * scale + translationY,
    21.22000063240528 * scale + translationX,
    15.000000447034836 * scale + translationY,
  );

  path.cubicTo(
    21.71778978257252 * scale + translationX,
    14.452363425490294 * scale + translationY,
    21.995590052076803 * scale + translationX,
    13.740055042145983 * scale + translationY,
    22.000000655651093 * scale + translationX,
    13.000000387430191 * scale + translationY,
  );

  path.lineTo(
    22.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    21.9955900520768 * scale + translationX,
    10.259945673109755 * scale + translationY,
    21.71778978257252 * scale + translationX,
    9.547637289765444 * scale + translationY,
    21.22000063240528 * scale + translationX,
    9.000000268220901 * scale + translationY,
  );

  path.cubicTo(
    21.71778978257252 * scale + translationX,
    8.45236324667636 * scale + translationY,
    21.995590052076803 * scale + translationX,
    7.74005486333205 * scale + translationY,
    22.000000655651093 * scale + translationX,
    7.000000208616257 * scale + translationY,
  );

  path.close();

  path.moveTo(
    20.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.cubicTo(
    20.0 * scale + translationX,
    19.552284749830793 * scale + translationY,
    19.552284749830793 * scale + translationX,
    20.0 * scale + translationY,
    19.0 * scale + translationX,
    20.0 * scale + translationY,
  );

  path.lineTo(
    5.0 * scale + translationX,
    20.0 * scale + translationY,
  );

  path.cubicTo(
    4.447715250169207 * scale + translationX,
    20.0 * scale + translationY,
    4.0 * scale + translationX,
    19.552284749830793 * scale + translationY,
    4.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.lineTo(
    4.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.cubicTo(
    4.0 * scale + translationX,
    16.447715250169207 * scale + translationY,
    4.447715250169207 * scale + translationX,
    16.0 * scale + translationY,
    5.0 * scale + translationX,
    16.0 * scale + translationY,
  );

  path.lineTo(
    19.0 * scale + translationX,
    16.0 * scale + translationY,
  );

  path.cubicTo(
    19.552284749830793 * scale + translationX,
    16.0 * scale + translationY,
    20.0 * scale + translationX,
    16.447715250169207 * scale + translationY,
    20.0 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    20.0 * scale + translationX,
    13.0 * scale + translationY,
  );

  path.cubicTo(
    20.0 * scale + translationX,
    13.552284749830793 * scale + translationY,
    19.552284749830793 * scale + translationX,
    14.0 * scale + translationY,
    19.0 * scale + translationX,
    14.0 * scale + translationY,
  );

  path.lineTo(
    5.0 * scale + translationX,
    14.0 * scale + translationY,
  );

  path.cubicTo(
    4.447715250169207 * scale + translationX,
    14.0 * scale + translationY,
    4.0 * scale + translationX,
    13.552284749830793 * scale + translationY,
    4.0 * scale + translationX,
    13.0 * scale + translationY,
  );

  path.lineTo(
    4.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    4.0 * scale + translationX,
    10.447715250169207 * scale + translationY,
    4.447715250169207 * scale + translationX,
    10.0 * scale + translationY,
    5.0 * scale + translationX,
    10.0 * scale + translationY,
  );

  path.lineTo(
    19.0 * scale + translationX,
    10.0 * scale + translationY,
  );

  path.cubicTo(
    19.552284749830793 * scale + translationX,
    10.0 * scale + translationY,
    20.0 * scale + translationX,
    10.447715250169207 * scale + translationY,
    20.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    20.0 * scale + translationX,
    7.0 * scale + translationY,
  );

  path.cubicTo(
    20.0 * scale + translationX,
    7.552284749830793 * scale + translationY,
    19.552284749830793 * scale + translationX,
    8.0 * scale + translationY,
    19.0 * scale + translationX,
    8.0 * scale + translationY,
  );

  path.lineTo(
    5.0 * scale + translationX,
    8.0 * scale + translationY,
  );

  path.cubicTo(
    4.447715250169207 * scale + translationX,
    8.0 * scale + translationY,
    4.0 * scale + translationX,
    7.552284749830793 * scale + translationY,
    4.0 * scale + translationX,
    7.0 * scale + translationY,
  );

  path.lineTo(
    4.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    4.0 * scale + translationX,
    4.447715250169207 * scale + translationY,
    4.447715250169207 * scale + translationX,
    4.0 * scale + translationY,
    5.0 * scale + translationX,
    4.0 * scale + translationY,
  );

  path.lineTo(
    19.0 * scale + translationX,
    4.0 * scale + translationY,
  );

  path.cubicTo(
    19.552284749830793 * scale + translationX,
    4.0 * scale + translationY,
    20.0 * scale + translationX,
    4.447715250169207 * scale + translationY,
    20.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    15.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    14.447715250169207 * scale + translationX,
    5.0 * scale + translationY,
    14.0 * scale + translationX,
    5.447715250169207 * scale + translationY,
    14.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.cubicTo(
    14.0 * scale + translationX,
    6.552284749830793 * scale + translationY,
    14.447715250169207 * scale + translationX,
    7.0 * scale + translationY,
    15.0 * scale + translationX,
    7.0 * scale + translationY,
  );

  path.cubicTo(
    15.552284749830793 * scale + translationX,
    7.0 * scale + translationY,
    16.0 * scale + translationX,
    6.552284749830793 * scale + translationY,
    16.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.cubicTo(
    16.0 * scale + translationX,
    5.447715250169207 * scale + translationY,
    15.552284749830793 * scale + translationX,
    5.0 * scale + translationY,
    15.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    9.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.lineTo(
    6.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    5.447715250169207 * scale + translationX,
    5.0 * scale + translationY,
    5.0 * scale + translationX,
    5.447715250169207 * scale + translationY,
    5.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.cubicTo(
    5.0 * scale + translationX,
    6.552284749830793 * scale + translationY,
    5.447715250169207 * scale + translationX,
    7.0 * scale + translationY,
    6.0 * scale + translationX,
    7.0 * scale + translationY,
  );

  path.lineTo(
    9.0 * scale + translationX,
    7.0 * scale + translationY,
  );

  path.cubicTo(
    9.552284749830793 * scale + translationX,
    7.0 * scale + translationY,
    10.0 * scale + translationX,
    6.552284749830793 * scale + translationY,
    10.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.cubicTo(
    10.0 * scale + translationX,
    5.447715250169207 * scale + translationY,
    9.552284749830793 * scale + translationX,
    5.0 * scale + translationY,
    9.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.close();

  canvas.drawPath(path, paint);
}