/************************************************************************/
/* Scroll in a loop by one pixel at a time                              */
/* Scroll using arrow keys and quit if Escape is pressed                */
/************************************************************************/

smooth_horizontal()
        {
        #define KEY_ESC         0x011B
        #define KEY_UP          0x4800
        #define KEY_DOWN        0x5000
        #define KEY_LEFT        0x4B00
        #define KEY_RIGHT       0x4D00
        #define KEY_ENTER       0x1C0D

        int     x = 0, i, key;
        set_more_columns(100); /* Select 100 text column mode          */
        for (i = 0; i < 25;i++) /* Fill newly organized text buffer     */
                printf("\nThis is text line %2d in the new text buffer",i);
        while((key = get_key()) != KEY_ENTER)
                switch (key)
                    {
                    case KEY_RIGHT:
                        x = (++x) > 799 ? 799 : x;
                        horizontal_scroll(x);           /* Scroll right */
                        break;
                    case KEY_LEFT:
                        x = (--x) < 0 ? 0 : x;
                        horizontal_scroll(x);           /* Scroll left  */
                        break;
                    default:
                        break;
                    }
        horizontal_scroll(0);
        }