window.cpp

串行通信编程源码

 *
 * ******************************************************************** */

void    Window::AtSayReverse(int c, int r,  // column and row to
              char *s)                      // display string
{

GotoXY(c, r);                               // set up at the right place
textcolor(FG(cr_color));                    // set up foreground
textbackground(BG(cr_color));               // ..and background colors

cprintf("%s", s);                           // display string in window

cursor_col = wherex();                      // save cursor column..
cursor_row = wherey();                      // ..and cursor row
textcolor(FG(cn_color));                    // then set colors back to
textbackground(BG(cn_color));               // ..their normal settings

}



/* ******************************************************************** *
 *
 *  Display -- display a character in a window
 *
 * ******************************************************************** */

void    Window::Display(char c)             // character to display
{

MakeCurrent();                              // make this window current
cprintf("%c", c);                           // display string in window
cursor_col = wherex();                      // save cursor column..
cursor_row = wherey();                      // ..and cursor row

}



/* ******************************************************************** *
 *
 *  Display -- display string in window
 *
 * ******************************************************************** */

void    Window::Display(char *s)            // string to display
{

MakeCurrent();                              // make this window current
cprintf("%s", s);                           // display string in window
cursor_col = wherex();                      // save cursor column..
cursor_row = wherey();                      // ..and cursor row

}



/* ******************************************************************** *
 *
 *  DisplayReverse -- display string in reverse video
 *
 * ******************************************************************** */

void    Window::DisplayReverse(char *s)     // string to display
{

MakeCurrent();                              // make this window current
textcolor(FG(cr_color));                    // set up foreground
textbackground(BG(cr_color));               // ..and background colors

cprintf("%s", s);                           // display string in window

cursor_col = wherex();                      // save cursor column..
cursor_row = wherey();                      // ..and cursor row
textcolor(FG(cn_color));                    // then set colors back to
textbackground(BG(cn_color));               // ..their normal settings

}



/* ******************************************************************** *
 *
 *  Clear -- clear current window
 *
 * ******************************************************************** */

void    Window::Clear(void)
{

MakeCurrent();                              // make this window current
clrscr();                                   // ..then clear it

cursor_col = wherex();                      // save cursor column..
cursor_row = wherey();                      // ..and cursor row

}



/* ******************************************************************** *
 *
 *  GotoXY -- position cursor in window
 *
 * ******************************************************************** */

void    Window::GotoXY(int c, int r)        // column and row
{

MakeCurrent();                              // make this window current
gotoxy(c, r);                               // goto requested location
cursor_col = wherex();                      // save cursor column..
cursor_row = wherey();                      // ..and cursor row

}



/* ******************************************************************** *
 *
 *  Close -- close window and restore screen
 *
 * ******************************************************************** */

void    Window::Close(void)
{

if (NOT open_flag)                          // q. window already closed?
    return;                                 // a. yes .. just return

open_flag = 0;                              // clear opened flag

puttext(ul_col, ul_row, lr_col, lr_row,     // restore old screen data
            old_data);                      // ..from temp buffer

}



/* ******************************************************************** *
 *
 *  ~Window -- destructor
 *
 * ******************************************************************** */

Window::~Window()
{

if (open_flag)                              // q. window still open?
    Close();                                // a. yes .. close window

last_window = 0;                            // clear window pointer
delete old_data;                            // de-allocate screen buffer
window(1, 1, 80, max_lines);                // set whole screen as window

}



/* ******************************************************************** *
 *
 *  MakeCurrent -- make this window current
 *
 * ******************************************************************** */

void    Window::MakeCurrent(void)
{

if (last_window != this)                    // q. same window?
    {
    last_window = this;                     // a. no .. use this window

    if (scroll_flag)                        // q. user want scrolling?
        _wrapon(_GWRAPON);                  // a. yes .. enable scrolling
     else
        _wrapon(_GWRAPOFF);                 // else .. disable scrolling

    if (border_flag == none)                // q. any border?
        window(ul_col, ul_row,              // a. no .. set up window
                lr_col, lr_row);            // ..using entire area
     else
        window(ul_col + 1, ul_row + 1,      // else .. set up the window
                lr_col - 1, lr_row - 1);    // ..allowing for the border

    gotoxy(cursor_col, cursor_row);         // ..and re-place cursor
    textcolor(FG(cn_color));                // ..and set up foreground
    textbackground(BG(cn_color));           // ..and background colors
    }
}



/* ******************************************************************** *
 *      wherex() -- determine column number                             *
 * ******************************************************************** */

int     wherex(void)
{
struct  rccoord pos;                        // row and col coordinates


pos = _gettextposition();                   // get current cursor ..
return(pos.col);                            // ..and return the column

}



/* ******************************************************************** *
 *      wherey() -- determine row number                                *
 * ******************************************************************** */

int     wherey(void)
{
struct  rccoord pos;                        // row and col coordinates


pos = _gettextposition();                   // get current cursor ..
return(pos.row);                            // ..and return the row nbr

}



/* ******************************************************************** *
 *      cprintf() -- handle outputing text to screen                    *
 * ******************************************************************** */

int     cprintf(char *msg, ...)             // message to format/display
{
char    buf[100];                           // string buffer
va_list list;                               // variable list


va_start(list, msg);                        // set up variable list
vsprintf(buf, msg, list);                   // ..format buffer
_outtext(buf);                              // ..then display message

return(strlen(buf));                        // ..and rtn w/string length

}