Fl_Positioner.H

//
// Positioner header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2022 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
//     https://www.fltk.org/bugs.php
//
 
/* \file
   Fl_Positioner widget . */
 
#ifndef Fl_Positioner_H
#define Fl_Positioner_H
 
#ifndef Fl_Widget_H
#include "Fl_Widget.H"
#endif
 
class FL_EXPORT Fl_Positioner : public Fl_Widget {
 
  double xmin, ymin;
  double xmax, ymax;
  double xvalue_, yvalue_;
  double xstep_, ystep_;
 
protected:
 
  // these allow subclasses to put the dial in a smaller area:
  void draw(int, int, int, int);
  int handle(int, int, int, int, int);
  void draw() FL_OVERRIDE;
 
public:
 
  int handle(int) FL_OVERRIDE;
  Fl_Positioner(int x,int y,int w,int h, const char *l=0);
  double xvalue() const {return xvalue_;}
  double yvalue() const {return yvalue_;}
  int xvalue(double);
  int yvalue(double);
  int value(double,double);
  void xbounds(double, double);
  double xminimum() const {return xmin;}
  void xminimum(double a) {xbounds(a,xmax);}
  double xmaximum() const {return xmax;}
  void xmaximum(double a) {xbounds(xmin,a);}
  void ybounds(double, double);
  double yminimum() const {return ymin;}
  void yminimum(double a) {ybounds(a, ymax);}
  double ymaximum() const {return ymax;}
  void ymaximum(double a) {ybounds(ymin, a);}
  void xstep(double a) {xstep_ = a;}
  void ystep(double a) {ystep_ = a;}
};
 
#endif