Fl_Tabs.H

//
// Tab header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2023 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_Tabs widget . */
 
#ifndef Fl_Tabs_H
#define Fl_Tabs_H
 
#include "Fl_Group.H"
 
struct Fl_Menu_Item;

class FL_EXPORT Fl_Tabs : public Fl_Group {
 
  Fl_Widget *push_;
 
protected:
 
  int overflow_type;    
  int tab_offset;       
  int *tab_pos;         
  int *tab_width;       
  int *tab_flags;       
  int tab_count;        
  Fl_Align tab_align_;  
  int has_overflow_menu;
 
  void take_focus(Fl_Widget *o);
  int maybe_do_callback(Fl_Widget *o);
  void check_overflow_menu();
  void handle_overflow_menu();
  void draw_overflow_menu_button();
 
  int on_insert(Fl_Widget*, int) FL_OVERRIDE;
  int on_move(int, int) FL_OVERRIDE;
  void on_remove(int) FL_OVERRIDE;
 
  virtual void redraw_tabs();
  virtual int tab_positions();  // allocate and calculate tab positions
  virtual void clear_tab_positions();
  virtual void draw_tab(int x1, int x2, int W, int H, Fl_Widget* o, int flags, int sel);
  virtual int tab_height();
  virtual int hit_close(Fl_Widget *o, int event_x, int event_y);
  virtual int hit_overflow_menu(int event_x, int event_y);
  virtual int hit_tabs_area(int event_x, int event_y);
 
  void draw() FL_OVERRIDE;
 
public:
 
  Fl_Tabs(int X, int Y, int W, int H, const char *L = 0);
  ~Fl_Tabs() FL_OVERRIDE;
 
  void resize(int, int, int, int) FL_OVERRIDE;
  void show() FL_OVERRIDE;
 
  int handle(int) FL_OVERRIDE;
  Fl_Widget *value();
  int value(Fl_Widget *);

  Fl_Widget *push() const { return push_; }
  int push(Fl_Widget *);
 
  virtual Fl_Widget *which(int event_x, int event_y);
  void client_area(int &rx, int &ry, int &rw, int &rh, int tabh=0);

  void tab_align(Fl_Align a) { tab_align_ = a; }

  Fl_Align tab_align() const { return tab_align_; }
 
  enum {
    OVERFLOW_COMPRESS = 0,  
    OVERFLOW_CLIP,          
    OVERFLOW_PULLDOWN,      
    OVERFLOW_DRAG           
  };
 
  void handle_overflow(int ov);
 
};
 
#endif