scrollTo method
Implementation
void scrollTo(double x, double y, {bool redraw = false}) {
if (x == _scrollX && y == _scrollY) {
return;
}
double oldX = _scrollX;
double oldY = _scrollY;
_scrollX = x;
_scrollY = y;
onScrollChanged(x, y, oldX, oldY);
if (redraw) {
invalidate();
}
}