Thread: Yet another lame program -- ncurses problem

  1. #1
    Registered User
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    Dec 2005
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    Yet another lame program -- ncurses problem

    Ok, i'm working on another simple ncurses program for a few friends and I. It's supposed to do this, in it's present state of being just a GUI-test (well, not exactly a GUI):

    1) Show title at top -- it does this.
    2) Create another window, below that, with a border. that window fills up the rest of the screen. --- this doens't work.

    Here's the source.
    Code:
    #include <ncurses.h>
    #include <stdarg.h>
    #include <string.h>
    #include <stdlib.h>
    #include <time.h>
    #include <ctype.h>
    
    int main(int argc, char *argv[]) {
      WINDOW *win;
      int curchar;
      int height = (LINES - 5);
      int width = (COLS - 3);
      
      initscr();
      cbreak();
      keypad(stdscr, TRUE);
      noecho();
      start_color();
      
      init_pair(1, COLOR_GREEN, COLOR_BLACK);
      init_pair(2, COLOR_BLUE, COLOR_BLACK);
      init_pair(3, COLOR_RED, COLOR_BLACK);
      init_pair(4, COLOR_WHITE, COLOR_BLACK);
      
      bkgdset(COLOR_BLACK);
      attron(A_BOLD | COLOR_PAIR(1));
      mvprintw(0, (COLS / 2) - (0.5 * strlen("SCSCO Communicator")), "SCSCO Communicator");
      attroff(A_BOLD);
      mvprintw(1, (COLS / 2) - (0.5 * strlen("By Cam Tenny")), "By Cam Tenny");
      attroff(COLOR_PAIR(1));
      win = newwin(height, width, 4, 1);
      wborder(win, '|', '|', '-', '-', '*', '*', '*', '*');
      wrefresh(stdscr);
      wrefresh(win);
      getch();
      delwin(win);
      endwin();
      return 0;
    }
    compile with -lncurses, if you actually try to run it.

  2. #2
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    Don't understand why but it shows the border if you create the window like this
    Code:
      win = newwin(LINES - 5, COLS - 3, 4, 1);
    and that should be just the same as your code. ?????
    Kurt

  3. #3
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    Dec 2005
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    52
    EDIT: Nevermind about the first part of my question (the colors), i just had to use wattron instead of attron.

    hmm. very interesting.
    but thanks!

    one last thing on this:

    Code:
      attron(COLOR_PAIR(2) | A_BOLD);
      wborder(win, ACS_CKBOARD, ACS_CKBOARD, ACS_CKBOARD, ACS_CKBOARD, ACS_CKBOARD, ACS_CKBOARD, ACS_CKBOARD, ACS_CKBOARD);
      attroff(COLOR_PAIR(2));
    (and color pair 2 is blue on black)
    it still shows the border as being in gray............
    any way around that?

    also, i heard that with ncurses and multiple windows you have to refresh them from the bottom up, or at least that you have to refresh them in some strange order..... can anybody tell me how (and how often) I should be refreshing these?
    Last edited by w00tw00tkab00t; 01-08-2006 at 03:03 PM.

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