paint method
Draw itself and its children, according to the calculated
box.offset
Implementation
@override
void paint(Context context) {
super.paint(context);
final vc = value.clamp(0.0, 1.0);
final _valueColor = valueColor ?? PdfColors.blue;
final _backgroundColor = backgroundColor ?? _valueColor.shade(0.1);
if (vc < 1.0) {
final epsilon = vc == 0 ? 0 : 0.01;
context.canvas
..drawRect(box!.left + box!.width * vc - epsilon, box!.bottom,
box!.width * (1 - vc) + epsilon, box!.height)
..setFillColor(_backgroundColor)
..fillPath();
}
if (vc > 0.0) {
context.canvas
..drawRect(box!.left, box!.bottom, box!.width * vc, box!.height)
..setFillColor(_valueColor)
..fillPath();
}
}