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//
// Scroll bar header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 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_Scrollbar widget . */
#ifndef Fl_Scrollbar_H
#define Fl_Scrollbar_H
#include "Fl_Slider.H"
/**
The Fl_Scrollbar widget displays a slider with arrow buttons at
the ends of the scrollbar. Clicking on the arrows move up/left and
down/right by linesize(). Scrollbars also accept FL_SHORTCUT events:
the arrows move by linesize(), and vertical scrollbars take Page
Up/Down (they move by the page size minus linesize()) and Home/End
(they jump to the top or bottom).
Scrollbars have step(1) preset (they always return integers). If
desired you can set the step() to non-integer values. You will then
have to use casts to get at the floating-point versions of value()
from Fl_Slider.
\image html scrollbar.png
\image latex scrollbar.png "Fl_Scrollbar" width=4cm
*/
class FL_EXPORT Fl_Scrollbar : public Fl_Slider {
int linesize_;
int pushed_;
static void timeout_cb(void*);
void increment_cb();
protected:
void draw();
public:
Fl_Scrollbar(int X,int Y,int W,int H, const char *L = 0);
~Fl_Scrollbar();
int handle(int);
/**
Gets the integer value (position) of the slider in the scrollbar.
You can get the floating point value with Fl_Slider::value().
\see Fl_Scrollbar::value(int p)
\see Fl_Scrollbar::value(int pos, int size, int first, int total)
*/
int value() const {return int(Fl_Slider::value());}
/**
Sets the value (position) of the slider in the scrollbar.
\see Fl_Scrollbar::value()
\see Fl_Scrollbar::value(int pos, int size, int first, int total)
*/
int value(int p) {return int(Fl_Slider::value((double)p));}
/**
Sets the position, size and range of the slider in the scrollbar.
\param[in] pos position, first line displayed
\param[in] windowSize number of lines displayed
\param[in] first_line number of first line
\param[in] total_lines total number of lines
You should call this every time your window changes size, your data
changes size, or your scroll position changes (even if in response
to a callback from this scrollbar).
All necessary calls to redraw() are done.
Calls Fl_Slider::scrollvalue(int pos, int size, int first, int total).
*/
int value(int pos, int windowSize, int first_line, int total_lines) {
return scrollvalue(pos, windowSize, first_line, total_lines);
}
/**
Get the size of step, in lines, that the arror keys move.
*/
int linesize() const {return linesize_;}
/**
This number controls how big the steps are that the arrow keys do.
In addition page up/down move by the size last sent to value()
minus one linesize(). The default is 16.
*/
void linesize(int i) {linesize_ = i;}
};
#endif
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