ncurses window problem

fronty · 09-21-2007, 10:29 AM

I encountered a problem while I read about using "windows" with ncurses library. When I tried to create a simple program using windows, it compiled well without any warnings, but window's borders don't show up in console. In some point I did something that made them flash (right now I don't have any idea about what I did), but after flashing once, they went away right away. I've tried to refresh it. Example programs in this tutorial don't work.

If someone wants, here's a simple example program.

Code:

#include <ncurses.h>

int main(void) {
        WINDOW *wp;

        initscr();

        wp = newwin(10, 10, 10, 10);
        box(wp, 0, 0);
        wprintw(wp, "foo");
        wrefresh(wp);

        endwin();
        return 0;
}

My OS is Gentoo Linux 2007.0. I'm using bash-3.1 and I've tried in ash-1.6. Compiler is gcc 4.1.1 and linker GNU ld-2.17. I have latest version of ncurses library. If someone needs more information, I can tell it.

matsp · 09-21-2007, 10:45 AM

Well, there's nothing in your program that prevents it from exiting as soon as it's finished showing the window... So I expect it will flash up a window for brief moment and then take it down again.

Try putting a "getchar()" before your return in main().

--
Mats

fronty · 09-21-2007, 11:07 AM

Sorry, forgot it from that program. I've used it, but it doesn't work.
And a littele more specifing, I _can_ see text written in window, but I _can't_ see windows borders.

fronty · 09-22-2007, 09:33 AM

Okay. Got it working. First I noticed, that if I put getch(); after calling box() in function that I made to create windows and put frames in it, it showed borders. After that I noticed, that if I replaced that getch(); with refresh();, same thing happened and I didn't have to press any key.

Looks like this problem is pretty much solved.

09-21-2007, 10:29 AM	#1
fronty Registered User Join Date: Jul 2007 Posts: 62	ncurses window problem I encountered a problem while I read about using "windows" with ncurses library. When I tried to create a simple program using windows, it compiled well without any warnings, but window's borders don't show up in console. In some point I did something that made them flash (right now I don't have any idea about what I did), but after flashing once, they went away right away. I've tried to refresh it. Example programs in this tutorial don't work. If someone wants, here's a simple example program. Code: #include <ncurses.h> int main(void) { WINDOW *wp; initscr(); wp = newwin(10, 10, 10, 10); box(wp, 0, 0); wprintw(wp, "foo"); wrefresh(wp); endwin(); return 0; } My OS is Gentoo Linux 2007.0. I'm using bash-3.1 and I've tried in ash-1.6. Compiler is gcc 4.1.1 and linker GNU ld-2.17. I have latest version of ncurses library. If someone needs more information, I can tell it.
fronty is offline

09-21-2007, 10:45 AM	#2
matsp Kernel hacker Join Date: Jul 2007 Location: Farncombe, Surrey, England Posts: 15,686	Well, there's nothing in your program that prevents it from exiting as soon as it's finished showing the window... So I expect it will flash up a window for brief moment and then take it down again. Try putting a "getchar()" before your return in main(). -- Mats __________________ Compilers can produce warnings - make the compiler programmers happy: Use them! Please don't PM me for help - and no, I don't do help over instant messengers.
matsp is offline

09-21-2007, 11:07 AM	#3
fronty Registered User Join Date: Jul 2007 Posts: 62	Sorry, forgot it from that program. I've used it, but it doesn't work. And a littele more specifing, I _can_ see text written in window, but I _can't_ see windows borders.
fronty is offline

09-22-2007, 09:33 AM	#4
fronty Registered User Join Date: Jul 2007 Posts: 62	Okay. Got it working. First I noticed, that if I put getch(); after calling box() in function that I made to create windows and put frames in it, it showed borders. After that I noticed, that if I replaced that getch(); with refresh();, same thing happened and I didn't have to press any key. Looks like this problem is pretty much solved.
fronty is offline

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