Fl_Check_Browser.H

//
// Fl_Check_Browser header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2020 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_Check_Browser widget . */
 
#ifndef Fl_Check_Browser_H
#define Fl_Check_Browser_H
 
#include "Fl.H"
#include "Fl_Browser_.H"

class FL_EXPORT Fl_Check_Browser : public Fl_Browser_ {
 
protected:
  /* required routines for Fl_Browser_ subclass: */
  void *item_first() const FL_OVERRIDE;
  void *item_next(void *) const FL_OVERRIDE;
  void *item_prev(void *) const FL_OVERRIDE;
  int item_height(void *) const FL_OVERRIDE;
  int item_width(void *) const FL_OVERRIDE;
  void item_draw(void *, int, int, int, int) const FL_OVERRIDE;
  void item_select(void *, int) FL_OVERRIDE;
  int item_selected(void *) const FL_OVERRIDE;
  const char *item_text(void *item) const FL_OVERRIDE;
 
public:
  void *item_at(int index) const FL_OVERRIDE;
  void item_swap(int ia, int ib);
  void item_swap(void *a, void *b) FL_OVERRIDE;
 
  /* private data */
 
public: // IRIX 5.3 C++ compiler doesn't support private structures...
 
#ifndef FL_DOXYGEN
  struct cb_item {
    cb_item *next;        
    cb_item *prev;        
    char checked;         
    char selected;        
    char *text;           
  };
#endif // !FL_DOXYGEN
 
private:
  cb_item *first;
  cb_item *last;
  cb_item *cache;
  int cached_item;
  int nitems_;
  int nchecked_;
  cb_item *find_item(int) const;
  int lineno(cb_item *) const;
 
public:
  Fl_Check_Browser(int x, int y, int w, int h, const char *l = 0);
  ~Fl_Check_Browser() { clear(); }
  int add(char *s);               // add an (unchecked) item
  int add(char *s, int b);        // add an item and set checked
                                  // both return the new nitems()
  int remove(int item);           // delete an item. Returns nitems()
 
  // inline const char * methods to avoid breaking binary compatibility...
  int add(const char *s) { return add((char *)s); }
  int add(const char *s, int b) { return add((char *)s, b); }
 
  void clear();                   // delete all items
  int nitems() const { return nitems_; }
  int nchecked() const { return nchecked_; }
  int checked(int item) const;
  void checked(int item, int b);
  void set_checked(int item) { checked(item, 1); }
  void check_all();
  void check_none();
  int value() const;              // currently selected item
  char *text(int item) const;     // returns pointer to internal buffer
 
protected:
  int handle(int) FL_OVERRIDE;
};
 
#endif // Fl_Check_Browser_H