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  * Copyright 2019-2020,2021 Thomas E. Dickey                                *
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  ****************************************************************************/
 
 /****************************************************************************
  *   Author: Juergen Pfeifer, 1997                                          *
  ****************************************************************************/
 
 // $Id: cursesapp.h,v 1.18 2021/06/17 21:26:02 tom Exp $
 
 #ifndef NCURSES_CURSESAPP_H_incl
 #define NCURSES_CURSESAPP_H_incl
 
 #include <ncursesw/cursslk.h>
 
 #if (defined(_WIN32) || defined(_WIN64))
 # define NCURSES_CXX_MAIN_NAME cursespp_main
 # define NCURSES_CXX_MAIN \
   int main(int argc, char *argv[]) { \
     return NCURSES_CXX_MAIN_NAME(argc, argv); \
   }
 #else
 # define NCURSES_CXX_MAIN_NAME main
 #endif
 NCURSES_CXX_IMPEXP int NCURSES_CXX_MAIN_NAME(int argc, char *argv[]);
 
 class NCURSES_CXX_IMPEXP NCursesApplication {
 public:
   typedef struct _slk_link {          // This structure is used to maintain
     struct _slk_link* prev;           // a stack of SLKs
     Soft_Label_Key_Set* SLKs;
   } SLK_Link;
 private:
   static int rinit(NCursesWindow& w); // Internal Init function for title
   static NCursesApplication* theApp;  // Global ref. to the application
 
   static SLK_Link* slk_stack;
 
 protected:
   static NCursesWindow* titleWindow;  // The Title Window (if any)
 
   bool b_Colors;                      // Is this a color application?
   NCursesWindow* Root_Window;         // This is the stdscr equiv.
 
   // Initialization of attributes;
   // Rewrite this in your derived class if you prefer other settings
   virtual void init(bool bColors);
 
   // The number of lines for the title window. Default is no title window
   // You may rewrite this in your derived class
   virtual int titlesize() const {
     return 0;
   }
 
   // This method is called to put something into the title window initially
   // You may rewrite this in your derived class
   virtual void title() {
   }
 
   // The layout used for the Soft Label Keys. Default is to have no SLKs.
   // You may rewrite this in your derived class
   virtual Soft_Label_Key_Set::Label_Layout useSLKs() const {
     return Soft_Label_Key_Set::None;
   }
 
   // This method is called to initialize the SLKs. Default is nothing.
   // You may rewrite this in your derived class
   virtual void init_labels(Soft_Label_Key_Set& S) const {
     (void) S;
   }
 
   // Your derived class must implement this method. The return value must
   // be the exit value of your application.
   virtual int run() = 0;
 
   // The constructor is protected, so you may use it in your derived
   // class constructor. The argument tells whether or not you want colors.
   NCursesApplication(bool wantColors = FALSE);
 
   NCursesApplication& operator=(const NCursesApplication& rhs)
   {
     if (this != &rhs) {
       *this = rhs;
     }
     return *this;
   }
 
   NCursesApplication(const NCursesApplication& rhs)
     : b_Colors(rhs.b_Colors),
       Root_Window(rhs.Root_Window)
   {
   }
 
   static NCursesWindow *&getTitleWindow();
 
 public:
   virtual ~NCursesApplication() THROWS(NCursesException);
 
   // Get a pointer to the current application object
   static NCursesApplication* getApplication();
 
   // This method runs the application and returns its exit value
   int operator()(void);
 
   // Process the commandline arguments. The default implementation simply
   // ignores them. Your derived class may rewrite this.
   virtual void handleArgs(int argc, char* argv[]) {
     (void) argc;
     (void) argv;
   }
 
   // Does this application use colors?
   inline bool useColors() const {
     return b_Colors;
   }
 
   // Push the Key Set S onto the SLK Stack. S then becomes the current set
   // of Soft Labelled Keys.
   void push(Soft_Label_Key_Set& S);
 
   // Throw away the current set of SLKs and make the previous one the
   // new current set.
   bool pop();
 
   // Retrieve the current set of Soft Labelled Keys.
   Soft_Label_Key_Set* top() const;
 
   // Attributes to use for menu and forms foregrounds
   virtual chtype foregrounds() const {
     return b_Colors ? static_cast<chtype>(COLOR_PAIR(1)) : A_BOLD;
   }
 
   // Attributes to use for menu and forms backgrounds
   virtual chtype backgrounds() const {
     return b_Colors ? static_cast<chtype>(COLOR_PAIR(2)) : A_NORMAL;
   }
 
   // Attributes to use for inactive (menu) elements
   virtual chtype inactives() const {
     return b_Colors ? static_cast<chtype>(COLOR_PAIR(3)|A_DIM) : A_DIM;
   }
 
   // Attributes to use for (form) labels and SLKs
   virtual chtype labels() const {
     return b_Colors ? static_cast<chtype>(COLOR_PAIR(4)) : A_NORMAL;
   }
 
   // Attributes to use for form backgrounds
   virtual chtype dialog_backgrounds() const {
     return b_Colors ? static_cast<chtype>(COLOR_PAIR(4)) : A_NORMAL;
   }
 
   // Attributes to use as default for (form) window backgrounds
   virtual chtype window_backgrounds() const {
     return b_Colors ? static_cast<chtype>(COLOR_PAIR(5)) : A_NORMAL;
   }
 
   // Attributes to use for the title window
   virtual chtype screen_titles() const {
     return b_Colors ? static_cast<chtype>(COLOR_PAIR(6)) : A_BOLD;
   }
 
 };
 
 #endif /* NCURSES_CURSESAPP_H_incl */

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