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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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vol_300
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337_01
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makehelp.c
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1991-01-12
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/* Copyright (c) James L. Pinson 1990,1991 */
/********************** MAKEHELP.C ***************************/
/*
link with :
hlp_menu.c
hlp_io.c
*/
#include "mydef.h"
#include "help.h"
#include <stdio.h>
struct hlp help;
int start(void) /* start is the entry point */
{
extern struct hlp help;
extern struct screen_structure scr;
extern struct window_structure w[];
cls();
get_name(help.filename); /* select a filename */
if(help.filename[0]=='\0'){ /* if none selected */
win_delete_top();
cls();
print(1,1,"A file must be selected.");
exit();
}
/* make the three windows */
help.edit= win_make(2,3,help.width,help.height,STD_FRAME,
"Edit: Then 'Esc' ",scr.normal,scr.normal);
help.menu= win_make(1,1,80,1,NO_FRAME,"",scr.inverse,scr.inverse);
cursor(NO_CURSOR);
help.status= win_make(1,25,80,1,NO_FRAME,"",scr.inverse,
scr.inverse);
cursor(NO_CURSOR);
main_menu(); /* call the first menu */
/* clean up to exit */
win_delete (help.edit);
win_delete (help.menu);
win_delete (help.status);
return (0);
}
/* this function allows editing of the help window */
void edit(int x, int y)
{
extern struct screen_structure scr;
extern struct window_structure w[];
char string[2];
char ch,ext;
scr.current=win_what_attr(help.edit);
ch= 0;
while(ch != ESCAPE) { /* read while key not 'Esc' */
ch=0;ext=0;
get_key(&ch,&ext);
/* break while{} loop if PgUp or PgDn */
if(ext==PGUP || ext==PGDN) break;
if(ch > 31){ /* if character */
string[0]=ch;string[1]='\0';/* build a string */
print_here(string); /* put on screen */
x++; /* increment cursor location */
}
else{
switch (ext){ /* if cursor key */
case UP:y-- ;break; /* act accordingly*/
case DOWN:y++ ;break;
case LEFT:x-- ;break;
case RIGHT:x++ ;break;
case HOME:x=1 ;break;
case END:x=scr.right-scr.left+1;break;
}
} /* end else */
if (ch==BACKSPACE)x--;
if(ch==RETURN){
x=1;
y++;
}
/* the following code adjusts the cursor within the window */
if(scr.left+x-1<scr.left){ /* too far left */
x=scr.right-scr.left+1;
y--;
}
if(scr.left+x-1>scr.right){x=1;y++;}; /* goto next line */
if(scr.top+y-1<scr.top)y=scr.bottom-scr.top+1;
if(scr.top+y-1>scr.bottom)y=1;
if (ch=='\b') print(x,y," ");
gotoxy(x,y);
} /* end while ch!=27 */
x=1;y=1;
gotoxy(x,y);
}
/* this function creates an input screen for entry
of new help screen sizes */
int get_size()
{
char width[3]="";
char height[3]="";
int in_window;
int return_code;
struct in_struc in_scrn[3]= {
/*
X Y Label name Ptr Length Label-color Field color */
1, 3, "Width (10-78): ", NULL, 2, WHITE,BLACK, BLACK,WHITE,
1, 4, "Height (5-23): ", NULL, 2, WHITE,BLACK, BLACK,WHITE,
0 /* terminator */
};
in_scrn[0].ptr =width;
in_scrn[1].ptr =height;
cls();
in_window= win_make(1,1,78,5,STD_FRAME,"",scr.normal,scr.normal);
print(1,1,"PLEASE ENTER HELP SCREEN SIZE:");
return_code = input(in_scrn);
if(return_code==ESCAPE)
return(return_code);
else{
help.width=atoi(width); /* convert to integer */
help.height=atoi(height);
}
win_delete(in_window);
return(0);
}
/* val_field() is used by input routine to check validity of data */
int val_field( char *string,int length,int field_number)
{
int value;
/* in this demo "length" is not used */
int age;
switch (field_number){
case 0: value=atoi(string); /* convert string to integer */
if (value <10 || value >78) return(REDO);
break;
case 1: value=atoi(string); /* convert string to integer */
if (value <5 || value >23) return(REDO);
}
return (OK);
}