I have problems accessing _maxx, it says: ./ScoreBoard.hpp:20:38: error: member access into incomplete type 'WINDOW' (aka '_win_st') mvwprintw(score_win, 0, score_win->_maxx - 10, "%11llu", score); ^ /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/curses.h:322:16: note: forward declaration of '_win_st' typedef struct _win_st WINDOW;
this is my code:
#pragma once
class Scoreboard {
protected:
WINDOW * score_win;
public :
Scoreboard(){
}
Scoreboard(int width, int y, int x){
score_win = newwin(1, width, y, x);
}
void initialize(int initial_score){
this->clear();
mvwprintw(score_win, 0, 0, "Score: ");
updateScore(initial_score);
this->refresh();
}
void updateScore(int score){
mvwprintw(score_win, 0, score_win->_maxx - 10, "%11llu", score);
}
void clear(){
wclear(score_win);
}
void refresh(){
wrefresh(score_win);
}
};
As noted in a comment, WINDOW may be opaque. That is a configurable feature of ncurses, which is used in the MacOS SDK. Toward the top of curses.h, you may see
/* These are defined only in curses.h, and are used for conditional compiles */
#define NCURSES_VERSION_MAJOR 5
#define NCURSES_VERSION_MINOR 7
#define NCURSES_VERSION_PATCH 20081102
/* This is defined in more than one ncurses header, for identification */
#undef NCURSES_VERSION
#define NCURSES_VERSION "5.7"
The opaque feature was added in March 2007:
+ add NCURSES_OPAQUE symbol to curses.h, will use to make structs
opaque in selected configurations.
Rather than use members of the WINDOW struct, there are functions which let you read the data:
getmaxx does exactly what you want, but it is intended for legacy applications (such as BSD curses)getmaxyx is the X/Open Curses equivalent which combines getmaxx and getmaxy.X/Open Curses does not specify whether WINDOW (or other types) is opaque, but it does not mention the struct members such as _maxx. Portable applications should prefer the functions which are standardized.