/usr/include/FL/Fl_Positioner.H is in libfltk1.1-dev 1.1.10-17.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// "$Id: Fl_Positioner.H 4288 2005-04-16 00:13:17Z mike $"
//
// Positioner header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2005 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#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();
public:
int handle(int);
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
//
// End of "$Id: Fl_Positioner.H 4288 2005-04-16 00:13:17Z mike $".
//
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