/*
    ************* Copyright 1990 by Vermont Creative Software **************

    TOPIC: Program that illustrates changing number of columns on the fly.

    BY:  Mark Schweitzer	    DATE: 12/18/90

    DESCRIPTION:  Example of how to dynamically change the number of
    columns between 80 and 132 from within a Vermont Views application.

    In order for this to work properly, the "co" mnemonic in VVTERMCAP
    must initially be set to the widest column size. In this case, co#132.
    This is necessary so that internal buffers are sufficiently allocated
    to handle the largest mode. 

    This application was written for a VT100 terminal.

*/


#include <vv_key.h>
#include <vv_main.h>

#define SET_132_COL "\033[?3h"
#define SET_80_COL "\033[?3l"

main()
{
    WINDOW wn;

    init_vv();

    wn_sdef(0, 0, 24, 132, LNORMAL, BDR_SLNP, &wn);
    wn_set(&wn);
    v_st("Terminal is in 132 column mode.\n", &wn);
    v_st("Press any key to continue.", &wn);
    ki();
    wn_unset(&wn);

    printf(SET_80_COL);
    _vid_scr.col_q = 80;
    _vpbytes = 80 * 24 * 2;

    wn_sdef(0, 0, 24, 80, LNORMAL, BDR_SLNP, &wn);
    wn_set(&wn);
    v_st("Terminal is in 80 column mode.\n", &wn);
    v_st("Press any key to continue.", &wn);
    ki();
    wn_unset(&wn);

    printf(SET_132_COL);
    _vid_scr.col_q = 132;
    _vpbytes = 132 * 24 * 2;

    wn_sdef(0, 0, 24, 132, LNORMAL, BDR_SLNP, &wn);
    wn_set(&wn);
    v_st("Terminal is in 132 column mode.\n", &wn);
    v_st("Press any key to continue.", &wn);
    ki();
    wn_unset(&wn);

    printf(SET_80_COL);

    exit_vv();
    return(1);
}