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   1 /******************************************************************************
   2  * to emulate the serial input and output of an 8051 controller               *
   3  * frontend.cc - the ncurses frontend                                         *
   4  ******************************************************************************/
   5 #include <sys/types.h>
   6 #include <iostream.h>
   7 #include <stdlib.h>
   8 #include <sys/stat.h>
   9 #include <fcntl.h>
  10 #include <curses.h>
  11 #include <errno.h>
  12 #include <string.h>
  13 #include <unistd.h>
  14 #include "frontend.hh"
  15
  16 Viewer::Viewer()
  17 {
  18         /* initalise the output screen */
  19         initscr();
  20         cbreak();
  21         noecho();
  22         nl();
  23         intrflush(stdscr,FALSE);
  24         keypad(stdscr, TRUE);
  25
  26         /* clear the screen and off you go */
  27         refresh();
  28
  29         // get the coordinates for the box
  30         /* create the subwindow */
  31         win_c.min_x = win_c.min_y = 0;
  32         getmaxyx(stdscr, win_c.max_y, win_c.max_x);
  33
  34         /* define the boxed size */
  35         topleft.x = win_c.min_x + 1;
  36         bottomright.x = win_c.max_x - 2;
  37         topleft.y = win_c.min_y + 1;
  38         bottomright.y = win_c.max_y - 2;
  39         middle_y = (int)((bottomright.y-topleft.y)/2)+1;
  40         middle_x = (int)((bottomright.x-topleft.x)/2)+1;
  41
  42         // draw the two subwindows
  43         inp_c.min_x = outp_c.min_x = topleft.x;
  44         inp_c.max_x = outp_c.max_x = bottomright.x;
  45         inp_c.min_y = topleft.y;
  46         inp_c.max_y = middle_y-topleft.y;
  47         outp_c.min_y = middle_y+1;
  48         outp_c.max_y = bottomright.y-middle_y;
  49         inp = subwin(stdscr, inp_c.max_y, inp_c.max_x, inp_c.min_y, inp_c.min_x);
  50         outp = subwin(stdscr, outp_c.max_y, outp_c.max_x, outp_c.min_y,outp_c.min_x);
  51
  52         // initalise the windows
  53         touchwin(inp);
  54         werase(inp);
  55         wrefresh(inp);
  56         scrollok(inp, TRUE);
  57
  58         touchwin(outp);
  59         werase(outp);
  60         wrefresh(outp);
  61         scrollok(outp, TRUE);
  62         refresh();
  63
  64         nodelay(inp, TRUE);
  65
  66         // flush the input buffers
  67         flushinp();
  68
  69         move(topleft.x,topleft.y);
  70         DrawBox();
  71 }
  72
  73 Viewer::~Viewer()
  74 {
  75         delwin(inp);
  76         delwin(outp);
  77         erase();
  78         refresh();
  79         endwin();
  80 }
  81
  82 void Viewer::DrawBox(void)
  83 {
  84         int height, width;
  85         COORDINATES current;
  86
  87         // save the current position
  88         getyx(stdscr, current.y, current.x);
  89
  90         height = (bottomright.y - topleft.y)+1;
  91         width = (bottomright.x - topleft.y)+1;
  92
  93         mvaddch(topleft.y-1, topleft.x-1, ACS_ULCORNER);
  94         mvaddch(topleft.y-1, bottomright.x+1, ACS_URCORNER);
  95         mvaddch(bottomright.y+1, bottomright.x+1, ACS_LRCORNER);
  96         mvaddch(bottomright.y+1, topleft.x-1, ACS_LLCORNER);
  97
  98         /* wmove (screen, y, x) */
  99         /* top */
 100         move(topleft.y-1, topleft.x);
 101         hline(ACS_HLINE, width);
 102         /* bottom */
 103         move(bottomright.y+1, topleft.x);
 104         hline(ACS_HLINE, width);
 105         move(bottomright.y+1, topleft.x);
 106         hline(ACS_HLINE, width);
 107
 108         /* left */
 109         move(topleft.y, topleft.x-1);
 110         vline(ACS_VLINE, height);
 111
 112         /* right */
 113         move(topleft.y, bottomright.x+1);
 114         vline(ACS_VLINE, height);
 115
 116         /* the divider */
 117         mvaddch(middle_y, bottomright.x+1, ACS_RTEE);
 118         mvaddch(middle_y, topleft.x-1, ACS_LTEE);
 119         hline(ACS_HLINE, width);
 120
 121         // the window titles
 122         mvaddstr(inp_c.min_y-1, middle_x-(strlen("Input")/2), "Input");
 123         mvaddstr(middle_y, middle_x-(strlen("Output")/2), "Output");
 124         move(current.y, current.x);
 125         refresh();
 126 }
 127
 128 void Viewer::AddStrOutWin(char *string)
 129 {
 130         waddstr(outp, string);
 131         wrefresh(outp);
 132 }
 133
 134 void Viewer::GetStrInWin(char *string)
 135 {
 136         if(wgetstr(inp, string) == ERR) {
 137                 string[0] = 0;
 138         } else {
 139                 waddstr(inp, string);
 140                 wrefresh(inp);
 141         }
 142 }
 143
 144 void Viewer::AddChOutWin(char b)
 145 {
 146         waddch(outp, b);
 147         wrefresh(outp);
 148 }
 149
 150 char Viewer::GetChInWin(void)
 151 {
 152         int b = wgetch(inp);
 153
 154         if(b==ERR) {
 155                 b=0;
 156         } else {
 157                 waddch(inp, (chtype)b);
 158                 wrefresh(inp);
 159         }
 160
 161         return((char)b);
 162 }