Category : Network Files
Archive   : CHAT.ZIP
Filename : SCREEN.C

 
Output of file : SCREEN.C contained in archive : CHAT.ZIP
/******************************************************************************
*
* Program Name: TALK_TO.ME
*
* Filename: SCREEN.C -- 10/25/88
*
* Purpose: Draws a user interface
*
******************************************************************************/

#include
#include
#include "chat.h"

void ClearEndOfLine();
void ClearReceiveBox();
void ClearScreen();
void ClearSendBox();
void CursorOff();
void CursorOn();
void DisplayHeadings();
void DrawBorder();
void DrawScreen();
void Error();
void ScrollUp();
void SetCursor();
void Update();
void WriteChar();

extern int sendRow,
sendCol,
receiveRow,
receiveCol;

union REGS regs;


void DrawScreen()
{
ClearScreen();
DrawBorder();
DisplayHeadings();
}


void DrawBorder()
{
int row,
col;

CursorOff();

for (row = TOP; row <= BOTTOM; row++)
{
for (col = LEFT_SIDE; col <= RIGHT_SIDE; col++)
{
SetCursor(row,col);

/* Check for top, bottom, or middle */
if (row == TOP)
{
if (col == LEFT_SIDE)
WriteChar(UPPER_LEFT);
else if (col == RIGHT_SIDE)
WriteChar(UPPER_RIGHT);
else
WriteChar(HORIZONTAL);
}
else if (row == BOTTOM)
{
if (col == LEFT_SIDE)
WriteChar(LOWER_LEFT);
else if (col == RIGHT_SIDE)
WriteChar(LOWER_RIGHT);
else
WriteChar(HORIZONTAL);
}
else if (row == MID_SCREEN)
{
if (col == LEFT_SIDE)
WriteChar(L_INTERSECT);
else if (col == RIGHT_SIDE)
WriteChar(R_INTERSECT);
else
WriteChar(HORIZONTAL);
}

/* Check for sides */
else if ( (col == LEFT_SIDE) || (col == RIGHT_SIDE) )
WriteChar(VERTICAL);
}
}
CursorOn();
}


void DisplayHeadings()
{
CursorOff();

SetCursor(1,2);
printf("RECEIVING");

SetCursor(11,2);
printf("SENDING");

SetCursor(22,6);
printf("ENTER = Return BACKSPACE = Delete TAB = Clear box ESCAPE = Quit");

SetCursor(13,2);
CursorOn();
}


void Update(string)
char *string;
{
int cursorRow, cursorCol;

CursorOff();
SetCursor (24,1);
printf ("System Message: %s",string);
GetCursor (&cursorRow, &cursorCol);
ClearEndOfLine (24, cursorCol);
SetCursor (sendRow,sendCol);
CursorOn();
}

void Error(text)
char *text;
{
ClearScreen();
printf("%s",text);
Exit();
}


void ClearScreen()
{
ScrollUp(0,0,24,0,79);
}


void ClearSendBox()
{
int lines = 7,
topRow = 13,
bottomRow = 19,
leftCol = 1,
rightCol = 78;

ScrollUp(lines,topRow,bottomRow,leftCol,rightCol);

sendRow = TOP_SEND_ROW;
sendCol = FIRST_TEXT_COL;
SetCursor(sendRow,sendCol);
}


void ClearReceiveBox()
{
int lines = 7, topRow = 3, bottomRow = 9, leftCol = 1, rightCol = 78;

ScrollUp (lines, topRow, bottomRow, leftCol, rightCol);
CursorOff();

receiveRow = TOP_RECEIVE_ROW;
receiveCol = FIRST_TEXT_COL;
SetCursor(sendRow, sendCol);
CursorOn();
}


void ClearEndOfLine (line, cursor)
int line, cursor;
{
ScrollUp (1, line, line, cursor, 79);
}


void WriteChar(ch)
char ch;
{
regs.h.ah = 0x09;
regs.h.al = ch;
regs.h.bl = 0x07;
regs.h.bh = 0;
regs.h.ch = 0;
regs.h.cl = 1;

int86(VIDEO, ®s, ®s);
}


void ScrollUp (lines, topRow, bottomRow, leftCol, rightCol)
int lines, topRow, bottomRow, leftCol, rightCol;
{
regs.h.ah = SCROLL_UP;
regs.h.al = lines;
regs.h.ch = topRow;
regs.h.cl = leftCol;
regs.h.dh = bottomRow;
regs.h.dl = rightCol;
regs.h.bh = 0x07;

int86(VIDEO, ®s, ®s);
}


void SetCursor(r,c)
int register c,
r;
{
union REGS regs;

regs.h.ah = SET_CURSOR;
regs.h.dl = c;
regs.h.dh = r;
regs.h.bh = 0;

int86(VIDEO, ®s, ®s);
}

void CursorOn()
{
int start = 12; /* top line of cursor */
int end = 13; /* bottom line of cursor */

regs.h.ch = start;
regs.h.cl = end;
regs.h.ah = CURSOR_SIZE;

int86(VIDEO, ®s, ®s);
}


void CursorOff()
{
regs.h.ch = STOPBIT;
regs.h.ah = CURSOR_SIZE;
int86(VIDEO, ®s, ®s);
}


GetCursor (cursorRow, cursorCol)
int *cursorRow, *cursorCol;
{
union REGS regs;

regs.h.ah = 3;
regs.h.bh = 0;
int86(VIDEO, ®s, ®s);

*cursorCol = regs.h.dl;
*cursorRow = regs.h.dh;
}





  3 Responses to “Category : Network Files
Archive   : CHAT.ZIP
Filename : SCREEN.C

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

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