int yo(BufferView const & bv) const;
/// set x/y drawing position cache if available
virtual void setPosCache(PainterInfo const &, int, int) const;
+ ///
+ void setDimCache(MetricsInfo const &, Dimension const &) const;
/// do we cover screen position x/y?
virtual bool covers(BufferView const & bv, int x, int y) const;
/// get the screen positions of the cursor (see note in Cursor.cpp)