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

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

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

  path.moveTo(
    5.640000000000001 * scale + translationX,
    17.0 * scale + translationY,
  );

  path.lineTo(
    4.930000000000001 * scale + translationX,
    17.71 * scale + translationY,
  );

  path.cubicTo(
    4.5422764052892015 * scale + translationX,
    18.100037454310925 * scale + translationY,
    4.542276405289202 * scale + translationX,
    18.729962545689077 * scale + translationY,
    4.9300000000000015 * scale + translationX,
    19.12 * scale + translationY,
  );

  path.cubicTo(
    5.320037454310924 * scale + translationX,
    19.507723594710797 * scale + translationY,
    5.949962545689076 * scale + translationX,
    19.5077235947108 * scale + translationY,
    6.34 * scale + translationX,
    19.12 * scale + translationY,
  );

  path.lineTo(
    7.050000000000001 * scale + translationX,
    18.41 * scale + translationY,
  );

  path.cubicTo(
    7.389776795928704 * scale + translationX,
    18.0132397225443 * scale + translationY,
    7.366932269681034 * scale + translationX,
    17.421805828454293 * scale + translationY,
    6.997563220613371 * scale + translationX,
    17.05243677938663 * scale + translationY,
  );

  path.cubicTo(
    6.628194171545706 * scale + translationX,
    16.683067730318964 * scale + translationY,
    6.036760277455699 * scale + translationX,
    16.660223204071293 * scale + translationY,
    5.639999999999999 * scale + translationX,
    16.999999999999996 * scale + translationY,
  );

  path.close();

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

  path.cubicTo(
    5.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    4.552284749830793 * scale + translationX,
    11.0 * scale + translationY,
    4.0 * scale + translationX,
    11.0 * scale + translationY,
  );

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

  path.cubicTo(
    2.4477152501692068 * scale + translationX,
    11.0 * scale + translationY,
    2.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    2.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    2.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    2.4477152501692068 * scale + translationX,
    13.0 * scale + translationY,
    3.0 * scale + translationX,
    13.0 * scale + translationY,
  );

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

  path.cubicTo(
    4.552284749830793 * scale + translationX,
    13.0 * scale + translationY,
    5.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    5.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.close();

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

  path.cubicTo(
    12.552284749830793 * scale + translationX,
    5.0 * scale + translationY,
    13.0 * scale + translationX,
    4.552284749830793 * scale + translationY,
    13.0 * scale + translationX,
    4.0 * scale + translationY,
  );

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

  path.cubicTo(
    13.0 * scale + translationX,
    2.4477152501692068 * scale + translationY,
    12.552284749830793 * scale + translationX,
    2.0 * scale + translationY,
    12.0 * scale + translationX,
    2.0 * scale + translationY,
  );

  path.cubicTo(
    11.447715250169207 * scale + translationX,
    2.0 * scale + translationY,
    11.0 * scale + translationX,
    2.4477152501692068 * scale + translationY,
    11.0 * scale + translationX,
    3.0 * scale + translationY,
  );

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

  path.cubicTo(
    11.0 * scale + translationX,
    4.552284749830793 * scale + translationY,
    11.447715250169207 * scale + translationX,
    5.0 * scale + translationY,
    12.0 * scale + translationX,
    5.0 * scale + translationY,
  );

  path.close();

  path.moveTo(
    5.640000000000001 * scale + translationX,
    7.05 * scale + translationY,
  );

  path.cubicTo(
    5.82626063852545 * scale + translationX,
    7.234744163617901 * scale + translationY,
    6.077660122615665 * scale + translationX,
    7.338895378455275 * scale + translationY,
    6.340000000000001 * scale + translationX,
    7.340000000000001 * scale + translationY,
  );

  path.cubicTo(
    6.60580298465003 * scale + translationX,
    7.341536758799639 * scale + translationY,
    6.861281169195307 * scale + translationX,
    7.237186514407906 * scale + translationY,
    7.050000000000001 * scale + translationX,
    7.05 * scale + translationY,
  );

  path.cubicTo(
    7.4377235947108 * scale + translationX,
    6.659962545689076 * scale + translationY,
    7.4377235947108 * scale + translationX,
    6.030037454310923 * scale + translationY,
    7.050000000000001 * scale + translationX,
    5.64 * scale + translationY,
  );

  path.lineTo(
    6.340000000000001 * scale + translationX,
    4.93 * scale + translationY,
  );

  path.cubicTo(
    5.943239722544301 * scale + translationX,
    4.590223204071295 * scale + translationY,
    5.351805828454292 * scale + translationX,
    4.613067730318963 * scale + translationY,
    4.982436779386628 * scale + translationX,
    4.982436779386627 * scale + translationY,
  );

  path.cubicTo(
    4.6130677303189636 * scale + translationX,
    5.3518058284542915 * scale + translationY,
    4.590223204071295 * scale + translationX,
    5.943239722544299 * scale + translationY,
    4.93 * scale + translationX,
    6.34 * scale + translationY,
  );

  path.close();

  path.moveTo(
    17.64 * scale + translationX,
    7.34 * scale + translationY,
  );

  path.cubicTo(
    17.902339877384335 * scale + translationX,
    7.338895378455275 * scale + translationY,
    18.15373936147455 * scale + translationX,
    7.2347441636179 * scale + translationY,
    18.34 * scale + translationX,
    7.050000000000001 * scale + translationY,
  );

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

  path.cubicTo(
    19.335376159720347 * scale + translationX,
    6.095610118517863 * scale + translationY,
    19.459681944265775 * scale + translationX,
    5.711881604936428 * scale + translationY,
    19.371810134984695 * scale + translationX,
    5.346581027546719 * scale + translationY,
  );

  path.cubicTo(
    19.283938325703616 * scale + translationX,
    4.98128045015701 * scale + translationY,
    18.99871954984299 * scale + translationX,
    4.696061674296381 * scale + translationY,
    18.633418972453278 * scale + translationX,
    4.6081898650153015 * scale + translationY,
  );

  path.cubicTo(
    18.268118395063567 * scale + translationX,
    4.520318055734222 * scale + translationY,
    17.884389881482132 * scale + translationX,
    4.6446238402796505 * scale + translationY,
    17.639999999999997 * scale + translationX,
    4.929999999999998 * scale + translationY,
  );

  path.lineTo(
    17.0 * scale + translationX,
    5.640000000000001 * scale + translationY,
  );

  path.cubicTo(
    16.612276405289197 * scale + translationX,
    6.030037454310923 * scale + translationY,
    16.6122764052892 * scale + translationX,
    6.659962545689078 * scale + translationY,
    17.0 * scale + translationX,
    7.050000000000002 * scale + translationY,
  );

  path.cubicTo(
    17.176292949722743 * scale + translationX,
    7.225361872240242 * scale + translationY,
    17.411596119836236 * scale + translationX,
    7.328752659108291 * scale + translationY,
    17.66 * scale + translationX,
    7.34 * scale + translationY,
  );

  path.close();

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

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

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

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

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

  path.cubicTo(
    21.552284749830793 * scale + translationX,
    13.0 * scale + translationY,
    22.0 * scale + translationX,
    12.552284749830793 * scale + translationY,
    22.0 * scale + translationX,
    12.0 * scale + translationY,
  );

  path.cubicTo(
    22.0 * scale + translationX,
    11.447715250169207 * scale + translationY,
    21.552284749830793 * scale + translationX,
    11.0 * scale + translationY,
    21.0 * scale + translationX,
    11.0 * scale + translationY,
  );

  path.close();

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

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

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

  path.cubicTo(
    11.0 * scale + translationX,
    21.552284749830793 * scale + translationY,
    11.447715250169207 * scale + translationX,
    22.0 * scale + translationY,
    12.0 * scale + translationX,
    22.0 * scale + translationY,
  );

  path.cubicTo(
    12.552284749830793 * scale + translationX,
    22.0 * scale + translationY,
    13.0 * scale + translationX,
    21.552284749830793 * scale + translationY,
    13.0 * scale + translationX,
    21.0 * scale + translationY,
  );

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

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

  path.close();

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

  path.cubicTo(
    17.969650845230213 * scale + translationX,
    16.7828763545096 * scale + translationY,
    17.482644631088313 * scale + translationX,
    16.8509561951319 * scale + translationY,
    17.166800413110106 * scale + translationX,
    17.166800413110106 * scale + translationY,
  );

  path.cubicTo(
    16.8509561951319 * scale + translationX,
    17.48264463108831 * scale + translationY,
    16.7828763545096 * scale + translationX,
    17.969650845230213 * scale + translationY,
    17.0 * scale + translationX,
    18.36 * scale + translationY,
  );

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

  path.cubicTo(
    18.10003745431092 * scale + translationX,
    19.457723594710803 * scale + translationY,
    18.729962545689077 * scale + translationX,
    19.4577235947108 * scale + translationY,
    19.12 * scale + translationX,
    19.07 * scale + translationY,
  );

  path.cubicTo(
    19.507723594710797 * scale + translationX,
    18.679962545689076 * scale + translationY,
    19.5077235947108 * scale + translationX,
    18.050037454310928 * scale + translationY,
    19.12 * scale + translationX,
    17.660000000000004 * scale + translationY,
  );

  path.close();

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

  path.cubicTo(
    8.962434276233122 * scale + translationX,
    6.5000002842416205 * scale + translationY,
    6.500000491365135 * scale + translationX,
    8.962434166957935 * scale + translationY,
    6.5000005215406444 * scale + translationX,
    12.000000248352686 * scale + translationY,
  );

  path.cubicTo(
    6.500000551716154 * scale + translationX,
    15.037566329747435 * scale + translationY,
    8.962434385508303 * scale + translationX,
    17.500000163539585 * scale + translationY,
    12.000000466903051 * scale + translationX,
    17.500000193715092 * scale + translationY,
  );

  path.cubicTo(
    15.037566548297802 * scale + translationX,
    17.500000223890602 * scale + translationY,
    17.50000043101412 * scale + translationX,
    15.03756643902262 * scale + translationY,
    17.500000521540642 * scale + translationX,
    12.000000357627869 * scale + translationY,
  );

  path.cubicTo(
    17.49449677219402 * scale + translationX,
    8.964716783403023 * scale + translationY,
    15.03528391671031 * scale + translationX,
    6.505503927919315 * scale + translationY,
    12.000000350056666 * scale + translationX,
    6.500000189614028 * scale + translationY,
  );

  path.close();

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

  path.cubicTo(
    10.06700395276889 * scale + translationX,
    15.50000060649231 * scale + translationY,
    8.500000664100105 * scale + translationX,
    13.932997224422852 * scale + translationY,
    8.500000692903999 * scale + translationX,
    12.000000640749935 * scale + translationY,
  );

  path.cubicTo(
    8.500000721707893 * scale + translationX,
    10.067004057077018 * scale + translationY,
    10.067004057077018 * scale + translationX,
    8.500000721707893 * scale + translationY,
    12.000000640749935 * scale + translationX,
    8.500000692903999 * scale + translationY,
  );

  path.cubicTo(
    13.93299722442285 * scale + translationX,
    8.500000664100106 * scale + translationY,
    15.50000060649231 * scale + translationX,
    10.067003952768886 * scale + translationY,
    15.500000692903996 * scale + translationX,
    12.000000536441801 * scale + translationY,
  );

  path.cubicTo(
    15.500000779315686 * scale + translationX,
    13.932997283054155 * scale + translationY,
    13.932997283054155 * scale + translationX,
    15.500000779315686 * scale + translationY,
    12.000000536441803 * scale + translationX,
    15.500000692903996 * scale + translationY,
  );

  path.close();

  canvas.drawPath(path, paint);
}