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 / 20.0;
  final scaleY = size.height / 21.97647755042376;
  final scale = math.min(scaleX, scaleY);

  final translationX = (size.width - 20.0 * scale) / 2 - 2.0 * scale;
  final translationY = (size.height - 21.97647755042376 * scale) / 2 - 0.9999999804242148 * scale;

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

  path.moveTo(
    8.0 * scale + translationX,
    6.0 * scale + translationY,
  );

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

  path.cubicTo(
    11.552284749830793 * scale + translationX,
    6.0 * scale + translationY,
    12.0 * scale + translationX,
    5.552284749830793 * scale + translationY,
    12.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    12.0 * scale + translationX,
    4.447715250169207 * scale + translationY,
    11.552284749830793 * scale + translationX,
    4.0 * scale + translationY,
    11.0 * scale + translationX,
    4.0 * scale + translationY,
  );

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

  path.cubicTo(
    7.447715250169207 * scale + translationX,
    4.0 * scale + translationY,
    7.0 * scale + translationX,
    4.447715250169207 * scale + translationY,
    7.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    7.0 * scale + translationX,
    5.552284749830793 * scale + translationY,
    7.447715250169207 * scale + translationX,
    6.0 * scale + translationY,
    8.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    16.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.cubicTo(
    16.552284749830793 * scale + translationX,
    6.0 * scale + translationY,
    17.0 * scale + translationX,
    5.552284749830793 * scale + translationY,
    17.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    17.0 * scale + translationX,
    4.447715250169207 * scale + translationY,
    16.552284749830793 * scale + translationX,
    4.0 * scale + translationY,
    16.0 * scale + translationX,
    4.0 * scale + translationY,
  );

  path.cubicTo(
    15.447715250169207 * scale + translationX,
    4.0 * scale + translationY,
    15.0 * scale + translationX,
    4.447715250169207 * scale + translationY,
    15.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.cubicTo(
    15.0 * scale + translationX,
    5.552284749830793 * scale + translationY,
    15.447715250169207 * scale + translationX,
    6.0 * scale + translationY,
    16.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    16.0 * scale + translationX,
    10.0 * scale + translationY,
  );

  path.cubicTo(
    15.447715250169207 * scale + translationX,
    10.0 * scale + translationY,
    15.0 * scale + translationX,
    10.447715250169207 * scale + translationY,
    15.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    15.0 * scale + translationX,
    11.552284749830793 * scale + translationY,
    15.447715250169207 * scale + translationX,
    12.0 * scale + translationY,
    16.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    16.552284749830793 * scale + translationX,
    12.0 * scale + translationY,
    17.0 * scale + translationX,
    11.552284749830793 * scale + translationY,
    17.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    17.0 * scale + translationX,
    10.447715250169207 * scale + translationY,
    16.552284749830793 * scale + translationX,
    10.0 * scale + translationY,
    16.0 * scale + translationX,
    10.0 * scale + translationY,
  );

  path.close();

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

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

  path.cubicTo(
    14.5176182061483 * scale + translationX,
    18.15068468118951 * scale + translationY,
    13.849316272484804 * scale + translationX,
    17.482382747526014 * scale + translationY,
    13.000000387430191 * scale + translationX,
    17.180000512003897 * scale + translationY,
  );

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

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

  path.cubicTo(
    18.656854825963045 * scale + translationX,
    15.000000496412941 * scale + translationY,
    20.000000645424556 * scale + translationX,
    13.656854676951435 * scale + translationY,
    20.000000596046448 * scale + translationX,
    12.000000357627869 * scale + translationY,
  );

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

  path.cubicTo(
    19.995589992472155 * scale + translationX,
    9.259945643307432 * scale + translationY,
    19.717789722967876 * scale + translationX,
    8.547637259963121 * scale + translationY,
    19.220000572800636 * scale + translationX,
    8.000000238418579 * scale + translationY,
  );

  path.cubicTo(
    19.717789722967876 * scale + translationX,
    7.452363216874036 * scale + translationY,
    19.99558999247216 * scale + translationX,
    6.740054833529726 * scale + translationY,
    20.000000596046448 * scale + translationX,
    6.000000178813934 * scale + translationY,
  );

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

  path.cubicTo(
    20.000000645424556 * scale + translationX,
    2.3431457998857246 * scale + translationY,
    18.656854825963045 * scale + translationX,
    0.9999999804242159 * scale + translationY,
    17.00000050663948 * scale + translationX,
    1.0000000298023224 * scale + translationY,
  );

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

  path.cubicTo(
    5.343145889292691 * scale + translationX,
    0.9999999804242148 * scale + translationY,
    4.000000069831183 * scale + translationX,
    2.343145799885723 * scale + translationY,
    4.0000001192092896 * scale + translationX,
    4.000000119209289 * scale + translationY,
  );

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

  path.cubicTo(
    4.004410722783581 * scale + translationX,
    6.740054833529728 * scale + translationY,
    4.282210992287862 * scale + translationX,
    7.452363216874037 * scale + translationY,
    4.780000142455101 * scale + translationX,
    8.000000238418579 * scale + translationY,
  );

  path.cubicTo(
    4.282210992287862 * scale + translationX,
    8.547637259963121 * scale + translationY,
    4.004410722783581 * scale + translationX,
    9.25994564330743 * scale + translationY,
    4.0000001192092896 * scale + translationX,
    10.000000298023224 * scale + translationY,
  );

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

  path.cubicTo(
    4.000000069831183 * scale + translationX,
    13.656854676951435 * scale + translationY,
    5.343145889292691 * scale + translationX,
    15.000000496412943 * scale + translationY,
    7.000000208616255 * scale + translationX,
    15.000000447034836 * scale + translationY,
  );

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

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

  path.cubicTo(
    10.150684442770933 * scale + translationX,
    17.482382747526017 * scale + translationY,
    9.482382509107437 * scale + translationX,
    18.15068468118951 * scale + translationY,
    9.180000273585321 * scale + translationX,
    19.000000566244125 * scale + translationY,
  );

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

  path.cubicTo(
    2.4477152501692068 * scale + translationX,
    19.0 * scale + translationY,
    2.0 * scale + translationX,
    19.447715250169207 * scale + translationY,
    2.0 * scale + translationX,
    20.0 * scale + translationY,
  );

  path.cubicTo(
    2.0 * scale + translationX,
    20.552284749830793 * scale + translationY,
    2.4477152501692068 * scale + translationX,
    21.0 * scale + translationY,
    3.0 * scale + translationX,
    21.0 * scale + translationY,
  );

  path.lineTo(
    9.18 * scale + translationX,
    21.0 * scale + translationY,
  );

  path.cubicTo(
    9.610625303046238 * scale + translationX,
    22.186454185325772 * scale + translationY,
    10.737815757502409 * scale + translationX,
    22.976477530847973 * scale + translationY,
    12.000000357627869 * scale + translationX,
    22.976477530847973 * scale + translationY,
  );

  path.cubicTo(
    13.262184957753329 * scale + translationX,
    22.976477530847973 * scale + translationY,
    14.3893754122095 * scale + translationX,
    22.186454185325772 * scale + translationY,
    14.82000044167042 * scale + translationX,
    21.00000062584877 * scale + translationY,
  );

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

  path.cubicTo(
    21.552284749830793 * scale + translationX,
    21.0 * scale + translationY,
    22.0 * scale + translationX,
    20.552284749830793 * scale + translationY,
    22.0 * scale + translationX,
    20.0 * scale + translationY,
  );

  path.cubicTo(
    22.0 * scale + translationX,
    19.447715250169207 * scale + translationY,
    21.552284749830793 * scale + translationX,
    19.0 * scale + translationY,
    21.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    6.0 * scale + translationX,
    4.0 * scale + translationY,
  );

  path.cubicTo(
    6.0 * scale + translationX,
    3.4477152501692068 * scale + translationY,
    6.447715250169207 * scale + translationX,
    3.0 * scale + translationY,
    7.0 * scale + translationX,
    3.0 * scale + translationY,
  );

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

  path.cubicTo(
    17.552284749830793 * scale + translationX,
    3.0 * scale + translationY,
    18.0 * scale + translationX,
    3.4477152501692068 * scale + translationY,
    18.0 * scale + translationX,
    4.0 * scale + translationY,
  );

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

  path.cubicTo(
    18.0 * scale + translationX,
    6.552284749830793 * scale + translationY,
    17.552284749830793 * scale + translationX,
    7.0 * scale + translationY,
    17.0 * scale + translationX,
    7.0 * scale + translationY,
  );

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

  path.cubicTo(
    6.447715250169207 * scale + translationX,
    7.0 * scale + translationY,
    6.0 * scale + translationX,
    6.552284749830793 * scale + translationY,
    6.0 * scale + translationX,
    6.0 * scale + translationY,
  );

  path.close();

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

  path.cubicTo(
    6.447715250169207 * scale + translationX,
    13.0 * scale + translationY,
    6.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    6.0 * scale + translationX,
    12.0 * scale + translationY,
  );

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

  path.cubicTo(
    6.0 * scale + translationX,
    9.447715250169207 * scale + translationY,
    6.447715250169207 * scale + translationX,
    9.0 * scale + translationY,
    7.0 * scale + translationX,
    9.0 * scale + translationY,
  );

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

  path.cubicTo(
    17.552284749830793 * scale + translationX,
    9.0 * scale + translationY,
    18.0 * scale + translationX,
    9.447715250169207 * scale + translationY,
    18.0 * scale + translationX,
    10.0 * scale + translationY,
  );

  path.lineTo(
    18.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    18.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    17.552284749830793 * scale + translationX,
    13.0 * scale + translationY,
    17.0 * scale + translationX,
    13.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    12.0 * scale + translationX,
    21.0 * scale + translationY,
  );

  path.cubicTo(
    11.447715250169207 * scale + translationX,
    21.0 * scale + translationY,
    11.0 * scale + translationX,
    20.552284749830793 * scale + translationY,
    11.0 * scale + translationX,
    20.0 * scale + translationY,
  );

  path.cubicTo(
    11.0 * scale + translationX,
    19.447715250169207 * scale + translationY,
    11.447715250169207 * scale + translationX,
    19.0 * scale + translationY,
    12.0 * scale + translationX,
    19.0 * scale + translationY,
  );

  path.cubicTo(
    12.552284749830793 * scale + translationX,
    19.0 * scale + translationY,
    13.0 * scale + translationX,
    19.447715250169207 * scale + translationY,
    13.0 * scale + translationX,
    20.0 * scale + translationY,
  );

  path.cubicTo(
    13.0 * scale + translationX,
    20.552284749830793 * scale + translationY,
    12.552284749830793 * scale + translationX,
    21.0 * scale + translationY,
    12.0 * scale + translationX,
    21.0 * scale + translationY,
  );

  path.close();

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

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

  path.cubicTo(
    7.447715250169207 * scale + translationX,
    10.0 * scale + translationY,
    7.0 * scale + translationX,
    10.447715250169207 * scale + translationY,
    7.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    7.0 * scale + translationX,
    11.552284749830793 * scale + translationY,
    7.447715250169207 * scale + translationX,
    12.0 * scale + translationY,
    8.0 * scale + translationX,
    12.0 * scale + translationY,
  );

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

  path.cubicTo(
    11.552284749830793 * scale + translationX,
    12.0 * scale + translationY,
    12.0 * scale + translationX,
    11.552284749830793 * scale + translationY,
    12.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.cubicTo(
    12.0 * scale + translationX,
    10.447715250169207 * scale + translationY,
    11.552284749830793 * scale + translationX,
    10.0 * scale + translationY,
    11.0 * scale + translationX,
    10.0 * scale + translationY,
  );

  path.close();

  canvas.drawPath(path, paint);
}