#ifndef cmUiDrvrFltk_h
#define cmUiDrvrFltk_h

class Fl_Tabs;
class Fl_Widget;
class Fl_Button;
class Fl_Check_Button;
class Fl_Menu_Button;
class Fl_Select_Browser;
class Fl_Box;
class Fl_Input;
class Fl_Value_Input;
class Fl_Value_Slider;
class Fl_Progress;
class Fl_Vert_Progress;
class Fl_File_Btn; 
class Fl_Text_Display;

class cmUiDrvrFltk
{
public:

  cmUiDrvrFltk(cmCtx_t* ctx, Fl_Tabs* tabs, cmUiDriverFunc_t cbFunc, void* cbArg);
  virtual ~cmUiDrvrFltk();

  void setBaseWindow( Fl_Tabs* tabs );
  void setCallback( cmUiDriverFunc_t cbFunc, void* cbArg );

  static cmUiRC_t cmUiDriverFunc( void* arg, const cmUiDriverArg_t* a );

private:
  struct panel_str;

  typedef struct ctl_str
  {
    cmUiCId_t         cId;     // control type id
    unsigned          usrId;   // user id
    unsigned          flags;   // flags from this controls create call.
    struct panel_str* pnl;     // parent panel
    Fl_Widget*        wdgt;    // this controls FLTK wdgt ptr
    cmUiDriverArg_t   cbArg;   // cached callback arg. recd used by this ctl
    struct ctl_str*   link;    // panel.ctls list link
   
    union
    {
      Fl_Button*         btn;    
      Fl_Check_Button*   chk;
      Fl_Menu_Button*    mbt;
      Fl_Select_Browser* lst;
      Fl_Box*            lbl;
      Fl_Input*          str;
      Fl_Text_Display*   con;
      Fl_Value_Input*    num;
      Fl_Value_Slider*   sld;
      Fl_Progress*       prg;
      Fl_Progress*       mtr;
      Fl_File_Btn*       fnb;
    } u;
  } ctl_t;

  typedef struct panel_str
  {
    cmUiDrvrFltk*     drvr;   // parent driver object
    Fl_Group*         grp;    // panel Widget
    unsigned          appId;  // id of the app. this panel serves
    unsigned          usrId;  // panels id
    int               x_offs; // left control border
    int               y_offs; // top control border
    ctl_t*            ctls;   // this panels control list
    cmUiDriverArg_t   cbArg;  // cached callback arg recd used by this ctl
    struct panel_str* link;   // links used by _panels
  } panel_t;

  cmErr_t          _err;     //
  Fl_Tabs*         _tabs;    // Fl_Tabs Widget containing the panels
  cmUiDriverFunc_t _cbFunc;  // application event callback function
  void*            _cbArgs;  // 
  panel_t*         _panels;  // panel list
  ctl_t            _dummy;   // 
    
  void        _insertNewCtl( panel_t* pp, ctl_t* ctl, Fl_Widget* wp, unsigned flags );
  bool        _hasNoAlignFlags( unsigned flags ) const;
  cmUiRC_t    _createCtl(   const cmUiDriverArg_t* a );
  cmUiRC_t    _destroyCtl(  unsigned appId, unsigned panelId, unsigned usrId, bool deleteWindowEleFlag );
  cmUiRC_t    _destroyCtl(  panel_t* pp, unsigned usrId, bool deleteWindowEleFlag );
  cmUiRC_t    _createPanel( const cmUiDriverArg_t* a );
  cmUiRC_t    _setValueCtl( const cmUiDriverArg_t* a );
  cmUiRC_t    _enableCtl( const cmUiDriverArg_t* a );
  cmUiRC_t    _destroyAllPanels( bool deleteWindowEleFl );
  cmUiRC_t    _destroyPanel(panel_t* pp, bool deleteWindowEleFl );
  cmUiRC_t    _findPanel( unsigned appId, unsigned usrId, panel_t*& ppRef, panel_t*& prvPnlRef, bool errFl=true );
  cmUiRC_t    _findCtl( panel_t* pp, unsigned usrId, ctl_t*& ctlRef, ctl_t*& prvCtlRef, bool errFl=true );
  void        _doCb( ctl_t* ctl, cmUiDId_t dId, unsigned flags );

  static void _s_ctl_cb(Fl_Widget* wp, void* data );
  static void _s_tab_cb(Fl_Widget* wp, void* data );
};

#endif