messages.c

#include <curses.h>

#include "board_model.h"
#include "messages.h"
#include "worm.h"
#include "worm_model.h"

// Clear an entire line on the display
void clearLineInMessageArea(const int row) {
    move(row, 0);
    for (int i = 1; i <= COLS; i++) {
        addch(' ');
    }
}

// Display status about the game in the message area
void showStatus(struct Board *board, struct Worm *worm) {
    int pos_line1 = LINES - MA_ROWS_RESERVED + 1;
    int pos_line2 = LINES - MA_ROWS_RESERVED + 2;
    int pos_line3 = LINES - MA_ROWS_RESERVED + 3;

    struct Pos headpos = getWormHeadPos(worm);
    mvprintw(pos_line1, 1, "Anzahl verbleibender Futterbrocken: %2d ",
             getNumberOfFoodItems(board));
    mvprintw(pos_line2, 1, "Wurm ist an Position: y=%3d x=%3d", headpos.y,
             headpos.x);
    mvprintw(pos_line3, 1, "Laenge des Wurms: %3d", getWormLength(worm));
}

// Display a dialog in the message area and wait for confirmation
// String prompt1 is displayed in the second line of the message area
// String prompt2 is displayed in the  third line of the message area
int showDialog(char *prompt1, char *prompt2) {
    const int pos_line1 = LINES - MA_ROWS_RESERVED + 1;
    const int pos_line2 = LINES - MA_ROWS_RESERVED + 2;
    const int pos_line3 = LINES - MA_ROWS_RESERVED + 3;

    if (prompt1 == NULL) {
        return RES_FAILED;
    }

    // Delete lines in the message area
    clearLineInMessageArea(pos_line1);
    clearLineInMessageArea(pos_line2);
    clearLineInMessageArea(pos_line3);

    // Display message
    mvprintw(pos_line2, 1, "%s", prompt1);
    if (prompt2 != NULL) {
        mvprintw(pos_line3, 1, "%s", prompt2);
    }
    refresh();

	napms(1000);	

    nodelay(stdscr, FALSE);
    const int ch = getch(); // Wait for user to press an arbitrary key
    nodelay(stdscr, TRUE);

    // Delete lines in the message area
    clearLineInMessageArea(pos_line1);
    clearLineInMessageArea(pos_line2);
    clearLineInMessageArea(pos_line3);

    // Display changes
    refresh();

    // Return code of key pressed
    return ch;
}