bool clamp_position (double&);
bool clamp_width (double&);
+ std::pair<double, double> position_range () const;
+ std::pair<double, double> width_range () const;
+
void set_position (double);
void set_width (double);
void update ();
+ void reset ();
+ void thaw ();
+
protected:
float left[2];
float right[2];