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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_200
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273_01
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tcmenu.cc
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1988-01-18
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#include <tcutil.h>
#include <tcmenu.h>
#include <string.h>
menubar(struct menu_struc *menu1, struct pull_down *pulls)
/* This function will display a menu-bar at the top of the screen.
Before calling this function you must set up the two menu stuctures
needed my the function. The two structures are:
1) menu_struc
2) pull_down
The structures are defined in tcmenu.h. To initialize do the following:
struct menu_struc menu = {4,setatr(WHITE,BLUE,BOLD,0),
"Application\0Gen\0Help\0Last\0"};
item-1 = number of menu selections.
item-2 = attr of menu bar.
item-3 = string of menu items seperated by a null character.
struct pull_down pulls[] = {4,20,"app1\0app2\0app3\0app4\0",
4,20,"gen1\0gen2\0gen3\0gen4\0",
4,20,"help1\0help2\0help3\0help4\0",
10,20,"l1\0l2\0l3\0l4\0l5\0l6\0l7\0l8\0l9\0la\0"};
Define structure pull_down with the same number of pull down menus as there
are menu items.
item-1 = number of pull down selections.
item-2 = length of the biggest pull down selection.
item-3 = string of pull down selections seperated by a null character.
To call the function do as follows:
item_num=menubar(&menu,&pulls[0]);
return = 0 if no items where selected.
return !=0 if an item was selected.
(the returned value will = the number of the menu item
selected. I.E. 1-x;
ALSO menu.selected will = the main menu item number selected and
menu.p_sel will = the pull down item number under that main menu item.
*/
{
int attr2, attr3;
int p, i, start, interval;
int x, key_val, rc, rc2;
int cur_state, orow, ocol;
char *items, save_1[160];
static int first = 1;
if(first) {
video_type();
first=0;
}
items=menu1->menu_string;
cur_state=get_cur(&orow,&ocol);
hide_cur();
attr2=_rotr(menu1->attr,4) & 0x0007;
attr3=_rotl(menu1->attr,4) & 0x0070;
attr2 = attr2 | attr3 | 0x0008;
menu1->rattr=attr2;
save_scr(0,0,0,79,&save_1);
x=0;
clrarea(0,0,0,79,menu1->attr);
interval=80 / menu1->nsels;
i = 0;
start=1;
for(p=0; p < menu1->nsels; p++) {
menu1->icol[x]=start;
menu1->ilen[x]=strlen(items);
x++;
writef(0,start,menu1->attr,items);
i = strlen(items) + 1;
items += i;
start += interval;
}
x=0;
rc2=0;
for(;;) {
rcolor(0,menu1->icol[x],attr2,menu1->ilen[x]);
if(rc2 == 0)
key_val=get_xa();
else {
key_val=rc2;
if(rc2 == K_ENTER) rc2=0;
}
switch (key_val) {
case K_ESC:
rc=0;
menu1->selected = 0;
menu1->p_sel=0;
goto pass_back;
case K_RIGHT:
rcolor(0,menu1->icol[x],menu1->attr,menu1->ilen[x]);
x++;
if(x == menu1->nsels) x=0;
if(rc2 == K_RIGHT) rc2=K_ENTER;
break;
case K_LEFT:
rcolor(0,menu1->icol[x],menu1->attr,menu1->ilen[x]);
x--;
if(x < 0) x = menu1->nsels -1;
if(rc2 == K_LEFT) rc2=K_ENTER;
break;
case K_ENTER:
rc=x + 1;
menu1->selected = rc;
rc2=do_pull_down(pulls+x,menu1);
if(rc2 == K_ESC) {
rc2 = 0;
break;
}
if(rc2 != K_ENTER) break;
goto pass_back;
default: break;
}
}
pass_back:
rest_scr(0,0,0,79,&save_1);
if(!cur_state) show_cur(1);
locate(orow,ocol);
return(rc);
}
do_pull_down(struct pull_down *pull, struct menu_struc *menu1)
{
int p, i, start;
int x, key_val, rc;
int wleft, wright, wbottom;
int y;
char *save_2;
char *items;
save_2=(char *)malloc(4000);
y = menu1->selected - 1;
items=pull->pull_items;
x=0;
if(menu1->icol[y] > 39) {
wright=menu1->icol[y] + menu1->ilen[y];
wleft=wright - pull->mlen - 2;
}
else {
wleft=menu1->icol[y] - 1;
wright=wleft + pull->mlen + 2;
}
wbottom=2 + pull->npulls;
save_scr(1,wleft,wbottom,wright,save_2);
make_window(1,wleft,wbottom,wright,menu1->attr,menu1->attr,0,"","");
if(menu1->icol[y] > 39) {
writefc(1,wright,menu1->attr,'\xb4');
writefc(1,wright - menu1->ilen[y] - 1,menu1->attr,'\xc1');
}
else {
writefc(1,wleft,menu1->attr,'\xc3');
writefc(1,wleft + menu1->ilen[y] + 1,menu1->attr,'\xc1');
}
i = 0;
start = 2;
for(p=0; p < pull->npulls; p++) {
writef(start,wleft + 1,menu1->attr,items);
i = strlen(items) + 1;
items += i;
start ++;
}
x=1;
for(;;) {
rcolor(x+1,wleft+1,menu1->rattr,pull->mlen);
key_val=get_xa();
switch (key_val) {
case K_ESC:
menu1->p_sel = 0;
rc=key_val;
goto pass_back;
case K_DOWN:
rcolor(x+1,wleft+1,menu1->attr,pull->mlen);
x++;
if(x > pull->npulls) x=1;
break;
case K_UP:
rcolor(x+1,wleft+1,menu1->attr,pull->mlen);
x--;
if(x < 1) x = pull->npulls;
break;
case K_ENTER:
menu1->p_sel = x;
rc=key_val;
goto pass_back;
case K_RIGHT:
case K_LEFT:
menu1->p_sel = 0;
rc=key_val;
goto pass_back;
}
}
pass_back:
rest_scr(1,wleft,wbottom,wright,save_2);
free(save_2);
return(rc);
}