mirror of
https://github.com/libretro/RetroArch.git
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116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2015 - Daniel De Matteis
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _MENU_NAVIGATION_H
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#define _MENU_NAVIGATION_H
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#include <stddef.h>
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#ifdef _WIN32
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#include <direct.h>
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#else
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#include <unistd.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct menu_navigation
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{
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struct
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{
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/* Quick jumping indices with L/R.
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* Rebuilt when parsing directory. */
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struct
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{
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size_t list[2 * (26 + 2) + 1];
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unsigned size;
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} indices;
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unsigned acceleration;
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} scroll;
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size_t selection_ptr;
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} menu_navigation_t;
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/**
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* menu_navigation_clear:
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* @pending_push : pending push ?
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*
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* Clears the navigation pointer.
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**/
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void menu_navigation_clear(menu_navigation_t *nav, bool pending_push);
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/**
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* menu_navigation_decrement:
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*
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* Decrement the navigation pointer.
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**/
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void menu_navigation_decrement(menu_navigation_t *nav, unsigned scroll_speed);
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/**
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* menu_navigation_increment:
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*
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* Increment the navigation pointer.
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**/
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void menu_navigation_increment(menu_navigation_t *nav, unsigned scroll_speed);
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/**
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* menu_navigation_set:
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* @idx : index to set navigation pointer to.
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* @scroll : should we scroll when needed?
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*
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* Sets navigation pointer to index @idx.
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**/
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void menu_navigation_set(menu_navigation_t *nav, size_t i, bool scroll);
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/**
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* menu_navigation_set_last:
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*
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* Sets navigation pointer to last index.
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**/
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void menu_navigation_set_last(menu_navigation_t *nav);
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/**
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* menu_navigation_descend_alphabet:
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* @ptr_out : Amount of indices to 'scroll' to get
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* to the next entry.
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*
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* Descends alphabet.
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* E.g.:
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* If navigation points to an entry called 'Beta',
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* navigation pointer will be set to an entry called 'Alpha'.
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**/
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void menu_navigation_descend_alphabet(menu_navigation_t *nav, size_t *ptr_out);
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/**
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* menu_navigation_ascends_alphabet:
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* @ptr_out : Amount of indices to 'scroll' to get
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* to the next entry.
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*
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* Ascends alphabet.
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* E.g.:
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* If navigation points to an entry called 'Alpha',
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* navigation pointer will be set to an entry called 'Beta'.
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**/
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void menu_navigation_ascend_alphabet(menu_navigation_t *nav, size_t *ptr_out);
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ssize_t menu_navigation_get_current_selection(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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