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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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l_bar.c
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C/C++ Source or Header
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1991-01-12
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141 lines
/* Copyright (c) James L. Pinson 1990,1991 */
/********************** L_BAR.C ***************************/
#include "mydef.h"
#include "stdio.h"
/*****************************************************************
Usage: int bar_menu(struct bar_struc bar_menu[], char normal,
char inverse)
struct bar_struc bar_menu= data structure containing menu options.
char normal,inverse= text attributes used for regular and
highlighted options.
Creates and manages a moving light bar menu at the first line of
the topmost (active) window.
*****************************************************************/
int bar_menu(struct bar_struc menu[], char normal, char inverse)
{
extern struct screen_structure scr;
extern struct window_structure w[];
int x=1; /* x screen location */
int y=1; /* y screen location */
int i,j; /* index variables */
int nu_opt; /* number of options in menu */
int old_caps=scr.bold_caps; /* original value of bold_caps */
int cur_opt; /* current menu (highlighted option) */
char ch; /* char and extension variables */
char ext;
int found = FALSE; /* selection made (found) flag */
int return_code=0;
int my_win=scr.active;
cls();
cursor(NO_CURSOR); /* turn off cursor */
/* set number of options to max */
/* figure how many options there are */
for(i=0;i<MAX_BAR;i++){
if (menu[i].name[0] == '\0'){
nu_opt = i;
break;
}
}
cur_opt = 0;
for(;;){ /* loop infinite */
x=1;
scr.bold_caps=!found; /* turn off caps when found */
for(i=0;i< nu_opt;i++){ /* print all options */
if(i == cur_opt) scr.current= inverse;
else scr.current= normal;
print(x,y,menu[i].name);
x=x+strlen(menu[i].name)+3; /* move option location */
}; /* end of menu printing loop */
if(menu[cur_opt].info[0]!='\0'){ /* is there info? */
scr.current=normal; /* then print it on next line */
scr.bold_caps=FALSE; /* don't highlight bold caps */
ceol(1,y+1); /* clear to end of line
to clear old info */
/* print new information */
print(1,y+1,menu[cur_opt].info);
}
if(found ){ /* selection made.
return correct return code if function
pointer NULL */
if(menu[cur_opt].fun==NULL) return(menu[cur_opt].select_id);
else{ /* else run option to get code */
return_code= (*menu[cur_opt].fun)() ;
win_pop_top(my_win);
ceol(1,1);
}
found = FALSE; /* reset flag, ready for new selection */
if (kbhit()) getch(); /* make sure keyboard buffer is clear */
}
else{ /* selection not made
read keys until selection is made */
get_key(&ch,&ext); ch=toupper(ch); /* get a character */
if (ext == RIGHT) cur_opt = cur_opt +1; /* move right */
if (ext == LEFT) cur_opt = cur_opt -1; /* move left */
if (cur_opt >= nu_opt) cur_opt =0; /* wrap if out of
bounds */
if (cur_opt < 0) cur_opt = nu_opt-1;
if (ch== RETURN) found = TRUE;
/* if we have a valid character then it may be a quick key */
if(ch!='\0'){
for(i=0;i<nu_opt;i++){ /* does it match an option? */
j=0; /* scan each menu option name */
/* check each letter within option */
while(menu[i].name[j]!= '\0'){
/* if match and not space */
if ( ch==menu[i].name[j++] && ch != ' '){
cur_opt = i; /* mark found flag and break */
found = TRUE;
break;
}
}
if(found==TRUE) break; /* break if found */
}
}
if (ch==ESCAPE){ /* EXIT IF ESCAPE KEY */
return_code = 0; /* exit but don't close down */
break; /* parent menu */
}
ext=ch=' ';
} /* end else */
/* a non-zero return code means exit menu */
if (return_code!=0) break;
} /* end for(;;)*/
scr.bold_caps=old_caps; /* restore old value */
return (return_code);
}