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newdemo.c

/*
 *  newdemo.c     -     A demo program using PDCurses. The program illustrate
 *                the use of colours for text output.
 *
 * $Id: newdemo.c,v 1.24 2002/06/29 23:32:18 tom Exp $
 */

#include <time.h>

#include <test.priv.h>

#define delay_output(x) napms(x)

/*
 *  The Australian map
 */
const char *AusMap[16] =
{
    "           A           A ",
    "    N.T. AAAAA       AAAA ",
    "     AAAAAAAAAAA  AAAAAAAA ",
    "   AAAAAAAAAAAAAAAAAAAAAAAAA Qld.",
    "AAAAAAAAAAAAAAAAAAAAAAAAAAAAA ",
    "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA ",
    " AAAAAAAAAAAAAAAAAAAAAAAAAAAA ",
    "   AAAAAAAAAAAAAAAAAAAAAAAAA N.S.W.",
    "W.A. AAAAAAAAA      AAAAAA Vic.",
    "       AAA   S.A.     AA",
    "                       A  Tas.",
    ""
};

/*
 *  Funny messages
 */
#define NMESSAGES   6

NCURSES_CONST char *messages[] =
{
    "Hello from the Land Down Under",
    "The Land of crocs. and a big Red Rock",
    "Where the sunflower runs along the highways",
    "the dusty red roads lead one to loneliness",
    "Blue sky in the morning and",
    "freezing nights and twinkling stars",
    ""
};

/*
 *  Trap interrupt
 */
static RETSIGTYPE
trap(int sig GCC_UNUSED)
{
    endwin();
    ExitProgram(EXIT_FAILURE);
}

/*
 *  Wait for user
 */
static int
WaitForUser(WINDOW *win)
{
    time_t t;
    chtype key;

    nodelay(win, TRUE);
    t = time((time_t *) 0);
    while (1) {
      if ((int) (key = wgetch(win)) != ERR) {
          if (key == 'q' || key == 'Q')
            return 1;
          else
            return 0;
      }
      if (time((time_t *) 0) - t > 5)
          return 0;
    }
}

static void
set_colors(WINDOW *win, int pair, int foreground, int background)
{
    if (has_colors()) {
      if (pair > COLOR_PAIRS)
          pair = COLOR_PAIRS;
      init_pair(pair, foreground, background);
      wattrset(win, COLOR_PAIR(pair));
    }
}

static int
use_colors(WINDOW *win, int pair, int attrs)
{
    if (has_colors()) {
      if (pair > COLOR_PAIRS)
          pair = COLOR_PAIRS;
      attrs |= COLOR_PAIR(pair);
    }
    wattrset(win, attrs);
    return attrs;
}

/*
 * Test sub windows
 */
static int
SubWinTest(WINDOW *win)
{
    int w, h, sw, sh, bx, by;
    WINDOW *swin1, *swin2, *swin3;

    getmaxyx(win, h, w);
    getbegyx(win, by, bx);
    sw = w / 3;
    sh = h / 3;
    if ((swin1 = subwin(win, sh, sw, by + 3, bx + 5)) == NULL)
      return 1;
    if ((swin2 = subwin(win, sh, sw, by + 4, bx + 8)) == NULL)
      return 1;
    if ((swin3 = subwin(win, sh, sw, by + 5, bx + 11)) == NULL)
      return 1;

    set_colors(swin1, 8, COLOR_RED, COLOR_BLUE);
    werase(swin1);
    mvwaddstr(swin1, 0, 3, "Sub-window 1");
    wrefresh(swin1);

    set_colors(swin2, 9, COLOR_CYAN, COLOR_MAGENTA);
    werase(swin2);
    mvwaddstr(swin2, 0, 3, "Sub-window 2");
    wrefresh(swin2);

    set_colors(swin3, 10, COLOR_YELLOW, COLOR_GREEN);
    werase(swin3);
    mvwaddstr(swin3, 0, 3, "Sub-window 3");
    wrefresh(swin3);

    delwin(swin1);
    delwin(swin2);
    delwin(swin3);
    WaitForUser(win);
    return 0;
}

static int
bounce(int n, int *dir, int len)
{
    if (*dir > 0)
      ++n;
    else
      --n;
    if (n <= 1 || n >= len - 2)
      *dir = *dir ? 0 : 1;
    return n;
}

/*
 *  Bouncing balls
 */
static int
BouncingBalls(WINDOW *win)
{
    int w, h;
    int x1, y1, xd1, yd1;
    int x2, y2, xd2, yd2;
    int x3, y3, xd3, yd3;

    getmaxyx(win, h, w);

    x1 = 2 + rand() % (w - 4);
    y1 = 2 + rand() % (h - 4);
    x2 = 2 + rand() % (w - 4);
    y2 = 2 + rand() % (h - 4);
    x3 = 2 + rand() % (w - 4);
    y3 = 2 + rand() % (h - 4);

    xd1 = 1;
    yd1 = 1;
    xd2 = 1;
    yd2 = 0;
    xd3 = 0;
    yd3 = 1;

    nodelay(win, TRUE);

    while (wgetch(win) == ERR) {
      x1 = bounce(x1, &xd1, w);
      y1 = bounce(y1, &yd1, h);
      x2 = bounce(x2, &xd2, w);
      y2 = bounce(y2, &yd2, h);
      x3 = bounce(x3, &xd3, w);
      y3 = bounce(y3, &yd3, h);

      set_colors(win, 11, COLOR_RED, COLOR_BLUE);
      mvwaddch(win, y1, x1, 'O');

      set_colors(win, 12, COLOR_BLUE, COLOR_RED);
      mvwaddch(win, y2, x2, '*');

      set_colors(win, 13, COLOR_YELLOW, COLOR_WHITE);
      mvwaddch(win, y3, x3, '@');

      wmove(win, 0, 0);
      wrefresh(win);
      delay_output(100);
    }
    return 0;
}

/*
 *  Main driver
 */
int
main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
{
    WINDOW *win;
    int w, x, y, i, j, k;
    char buffer[200];
    const char *message;
    int width, height;
    chtype save[80];
    chtype c;

    setlocale(LC_ALL, "");

    initscr();
    if (has_colors())
      start_color();
    cbreak();
    curs_set(0);
    signal(SIGINT, trap);
    width = 48;
    height = 14;        /* Create a drawing window */
    win = newwin(height, width, (LINES - height) / 2, (COLS - width) / 2);
    if (win == NULL) {
      endwin();
      ExitProgram(EXIT_FAILURE);
    }

    while (1) {
      set_colors(win, 1, COLOR_WHITE, COLOR_BLUE);
      werase(win);

      set_colors(win, 2, COLOR_RED, COLOR_RED);
      box(win, ACS_VLINE, ACS_HLINE);
      wrefresh(win);
      /* Do ramdom output of a character */
      use_colors(win, 1, A_NORMAL);
      c = 'a';
      for (i = 0; i < 5000; ++i) {
          x = rand() % (width - 2) + 1;
          y = rand() % (height - 2) + 1;
          mvwaddch(win, y, x, c);
          wrefresh(win);
          nodelay(win, TRUE);
          if (wgetch(win) != ERR)
            break;
          if (i == 2000) {
            c = 'b';
            set_colors(win, 3, COLOR_CYAN, COLOR_YELLOW);
          }
      }

      SubWinTest(win);
      /* Erase and draw green window */
      set_colors(win, 4, COLOR_YELLOW, COLOR_GREEN);
      wbkgd(win, use_colors(win, 4, A_BOLD));
      werase(win);
      wrefresh(win);
      /* Draw RED bounding box */
      use_colors(win, 2, A_NORMAL);
      box(win, ' ', ' ');
      wrefresh(win);
      /* Display Australia map */
      use_colors(win, 4, A_BOLD);
      i = 0;
      while (*AusMap[i]) {
          mvwaddstr(win, i + 1, 8, AusMap[i]);
          wrefresh(win);
          delay_output(50);
          ++i;
      }

      set_colors(win, 5, COLOR_BLUE, COLOR_WHITE);
      use_colors(win, 5, A_BLINK);
      mvwaddstr(win, height - 2, 6, " PDCurses 2.1 for DOS, OS/2 and Unix");
      wrefresh(win);

      /* Draw running messages */
      set_colors(win, 6, COLOR_YELLOW, COLOR_WHITE);
      message = messages[j = 0];
      i = 1;
      w = width - 2;
      strcpy(buffer, message);
      while (j < NMESSAGES) {
          while ((int) strlen(buffer) < w) {
            strcat(buffer, " ... ");
            strcat(buffer, messages[++j % NMESSAGES]);
          }

          if (i < w)
            mvwaddnstr(win, height / 2, w - i, buffer, i);
          else
            mvwaddnstr(win, height / 2, 1, buffer, w);

          wrefresh(win);
          nodelay(win, TRUE);
          if (wgetch(win) != ERR) {
            flushinp();
            break;
          }
          if (i++ >= w) {
            for (k = 0; (buffer[k] = buffer[k + 1]) != '\0'; k++) ;
          }
          delay_output(100);
      }

      j = 0;
      /*  Draw running As across in RED */
      set_colors(win, 7, COLOR_RED, COLOR_GREEN);
      for (i = 2; i < width - 4; ++i) {
          k = mvwinch(win, 4, i);
          if (k == ERR)
            break;
          save[j++] = c = k;
          c &= A_CHARTEXT;
          mvwaddch(win, 4, i, c);
      }
      wrefresh(win);

      /* Put a message up wait for a key */
      i = height - 2;
      use_colors(win, 5, A_NORMAL);
      mvwaddstr(win, i, 5, " Type a key to continue or 'Q' to quit ");
      wrefresh(win);

      if (WaitForUser(win) == 1)
          break;

      j = 0;                  /* Restore the old line */
      for (i = 2; i < width - 4; ++i)
          mvwaddch(win, 4, i, save[j++]);
      wrefresh(win);

      BouncingBalls(win);
      /* Put a message up wait for a key */
      i = height - 2;
      use_colors(win, 5, A_NORMAL);
      mvwaddstr(win, i, 5, " Type a key to continue or 'Q' to quit ");
      wrefresh(win);
      if (WaitForUser(win) == 1)
          break;
    }
    endwin();
    ExitProgram(EXIT_SUCCESS);
}

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