draw textspan

[softmarshmallow]

  drawText(TouchyCanvas canvas) {
    TextSpan span = new TextSpan(
        style: new TextStyle(color: Colors.blue[800]), text: "name");
    TextPainter tp = new TextPainter(
        text: span,
        textAlign: TextAlign.left,
        textDirection: TextDirection.ltr);
    tp.layout();
    tp.paint(canvas as Canvas, new Offset(5.0, 5.0));
  }

Expected a value of type 'Canvas', but got one of type 'TouchyCanvas'

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[kataro92]

You can use Canvas from origin just like below code:

@override
void paint(Canvas originCanvas) {
    var canvas = TouchyCanvas(context, originCanvas);
}

drawText(TouchyCanvas canvas) {
    TextSpan span = new TextSpan(
        style: new TextStyle(color: Colors.blue[800]), text: "name");
    TextPainter tp = new TextPainter(
        text: span,
        textAlign: TextAlign.left,
        textDirection: TextDirection.ltr);
    tp.layout();
    tp.paint(originCanvas, new Offset(5.0, 5.0));
  }