const int Ruler::MinorTickSubdivision = 4;
const int Ruler::ScaleUnits[3] = {1, 2, 5};
const int Ruler::MinorTickSubdivision = 4;
const int Ruler::ScaleUnits[3] = {1, 2, 5};
const double min_period = _view.scale() * min_width;
const int order = (int)floorf(log10f(min_period));
const double min_period = _view.scale() * min_width;
const int order = (int)floorf(log10f(min_period));