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/* Scrolling Menus
* Copyright (C) 1998 J.A. Bezemer
*
* Licensed under the terms of the GNU General Public License.
* ABSOLUTELY NO WARRANTY.
* See the file `COPYING' in this directory.
*/
#include "scrollmenu.h"
#include <stdlib.h>
#ifndef OLD_CURSES
#include <ncurses.h>
#else
#include <curses.h>
#endif
void
scrollmenu_display (scrollmenu_t * menu)
{
int i, j, x1, y1;
if (menu->selected >= menu->number)
menu->selected = menu->number - 1;
/* May get selected=-1 if number==0... */
if (menu->selected < 0) /* ...so this one must be last! */
menu->selected = 0;
if (menu->selected < menu->firstonscreen)
menu->firstonscreen = menu->selected;
if (menu->selected >= menu->firstonscreen + menu->h)
menu->firstonscreen = menu->selected - menu->h + 1;
for (i = 0; i < menu->h; i++)
{
if (menu->firstonscreen + i == menu->selected && menu->hasfocus)
attron (A_STANDOUT);
if (menu->firstonscreen + i < menu->number)
mvaddnstr (menu->y + i,
menu->x,
menu->items[menu->firstonscreen + i],
menu->w);
else
move (menu->y + i, menu->x);
getyx (stdscr, y1, x1);
for (j = x1; j < menu->x + menu->w; j++)
addch (' ');
if (menu->firstonscreen + i == menu->selected && menu->hasfocus)
attroff (A_STANDOUT);
}
move (menu->y + menu->selected - menu->firstonscreen, menu->x);
}
int
scrollmenu_stdkeys (int key, scrollmenu_t * menu)
/* Returns >0: item was selected;
Returns -1 if nothing serious has happened.
*/
{
int returnval = -1;
switch (key)
{
case 'k': /* Well, `less'-keys here also... */
case 'K':
case KEY_UP:
(menu->selected)--;
break;
case 'j':
case 'J':
case KEY_DOWN:
(menu->selected)++;
break;
case KEY_NPAGE:
if (menu->selected < menu->firstonscreen +
menu->h - 1)
menu->selected = menu->firstonscreen +
menu->h - 1;
else
menu->selected += menu->h - 1;
break;
case KEY_PPAGE:
if (menu->selected > menu->firstonscreen)
menu->selected = menu->firstonscreen;
else
menu->selected -= (menu->h - 1);
break;
case 13:
case KEY_ENTER:
returnval = menu->selected;
break;
}
if (menu->selected < 0)
menu->selected = 0;
if (menu->selected >= menu->number)
menu->selected = menu->number - 1;
return returnval;
}
void
scrollmenu_delete_menu (scrollmenu_t * menu)
{
int i;
if (menu->items != NULL)
{
for (i = 0; i < menu->number; i++)
free (menu->items[i]);
free (menu->items);
menu->items = NULL;
}
}
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