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listbox.h
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listbox.h
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/*
* Copyright (C) 2018 Mark Hills <mark@xwax.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*/
/*
* Generic UI listbox widget internals
*/
#ifndef LISTBOX_H
#define LISTBOX_H
/* Managed context of a scrolling window, of a number of fixed-height
* lines, backed by a list of a known number of entries */
struct listbox {
int entries, lines, offset, selected;
};
void listbox_init(struct listbox *s);
void listbox_set_lines(struct listbox *s, unsigned int lines);
void listbox_set_entries(struct listbox *s, unsigned int entries);
/* Scroll functions */
void listbox_up(struct listbox *s, unsigned int n);
void listbox_down(struct listbox *s, unsigned int n);
void listbox_first(struct listbox *s);
void listbox_last(struct listbox *s);
void listbox_to(struct listbox *s, unsigned int n);
int listbox_current(const struct listbox *s);
int listbox_map(const struct listbox *s, int row);
#endif