draw method
Implementation
@override
void draw(Canvas canvas, double space, double size, double radius) {
double progress = page - index;
double secondOffset = index == widget.count - 1
? radius
: radius + ((index + 1) * (size + space));
if (progress > 0.5) {
canvas.drawCircle(new Offset(secondOffset, radius), radius, _paint);
} else {
canvas.drawCircle(new Offset(radius + (index * (size + space)), radius),
radius, _paint);
}
}