applyParentOffset method
Implementation
void applyParentOffset(ui.Offset offset) {
// only apply offset on scaled values, those have chart coordinates that are painted.
// not needed to offset : StackableValuePoint predecessorPoint;
/// Scaled values represent screen coordinates, apply offset to all.
scaledX += offset.dx;
scaledY += offset.dy;
scaledFromY += offset.dy;
scaledToY += offset.dy;
scaledFrom += offset;
scaledTo += offset;
}