Searching for a working example of a curses application that resizes in xterm

[Grant Edwards]

On 2005-09-19, schwerdy at web.de <schwerdy at web.de> wrote:

> can someone provide an example of a curses application that works in a
> xterm that can be resized?

I'm afraid I can't post the entire program, but what you need
to do is to catch the WINCH signal and set a flag which is
checked by your main "event" loop and handled.  Here's the
basic C code:

static void sigwinchHandler(int sig)
{
  (void) sig;
  sigwinchReceived = 1;
}

static void clipWindows(void)
{
  tCh *ch;
  int x,y,rows,cols;

  for (ch = chlist; ch != NULL; ch = ch->next)
    {
      getbegyx(ch->win,y,x);
      getmaxyx(ch->win,rows,cols);
      clipwin(&rows,&cols,&y,&x);
      moveWindow(ch,rows,cols,y,x);
    }
}


main()
 {
 [...]
 sigact.sa_handler = sigwinchHandler;
 s = sigaction(SIGWINCH, &sigact, NULL);  
 assert(s==0);
 

 // start up curses  
 while (1)  
   {
     // do stuff
     if (sigwinchReceived)
       {
         struct winsize size;
         if (ioctl(fileno(stdout), TIOCGWINSZ, &size) == 0) 
           {
             resizeterm(size.ws_row, size.ws_col);
             clipWindows();
           }
         sigwinchReceived = 0;
       }
    }   
 } 

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Grant Edwards                   grante             Yow!  If I am elected no
                                  at               one will ever have to do
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