3823486a58
Useful for the debug menus where users shouldn't think pressing select would do anything. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13588 a1c6a512-1295-4272-9138-f99709370657
209 lines
7.4 KiB
C
209 lines
7.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 by Kevin Ferrare
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _GUI_LIST_H_
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#define _GUI_LIST_H_
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#include "config.h"
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#include "icon.h"
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#include "screen_access.h"
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#define SCROLLBAR_WIDTH 6
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enum list_wrap {
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LIST_WRAP_ON = 0,
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LIST_WRAP_OFF,
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LIST_WRAP_UNLESS_HELD,
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};
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/*
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* The gui_list is based on callback functions, if you want the list
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* to display something you have to provide it a function that
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* tells it what to display.
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* There are two callback function :
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* one to get the text and one to get the icon
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*/
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/*
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* Icon callback
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* - selected_item : an integer that tells the number of the item to display
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* - data : a void pointer to the data you gave to the list when
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* you initialized it
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* - icon : a pointer to the icon, the value inside it is used to display
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* the icon after the function returns.
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* Note : we use the ICON type because the real type depends of the plateform
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*/
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typedef enum themable_icons list_get_icon(int selected_item, void * data);
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/*
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* Text callback
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* - selected_item : an integer that tells the number of the item to display
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* - data : a void pointer to the data you gave to the list when
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* you initialized it
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* - buffer : a buffer to put the resulting text on it
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* (The content of the buffer may not be used by the list, we use
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* the return value of the function in all cases to avoid filling
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* a buffer when it's not necessary)
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* Returns a pointer to a string that contains the text to display
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*/
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typedef char * list_get_name(int selected_item,
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void * data,
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char *buffer);
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struct gui_list
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{
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/* defines wether the list should stop when reaching the top/bottom
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* or should continue (by going to bottom/top) */
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bool limit_scroll;
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/* wether the text of the whole items of the list have to be
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* scrolled or only for the selected item */
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bool scroll_all;
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bool cursor_flash_state;
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int nb_items;
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int selected_item;
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int start_item; /* the item that is displayed at the top of the screen */
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/* the number of lines that are selected at the same time */
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int selected_size;
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/* These are used to calculate how much of the screen content we need
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to redraw. */
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int last_displayed_selected_item;
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int last_displayed_start_item;
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#ifdef HAVE_LCD_BITMAP
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int offset_position; /* the list's screen scroll placement in pixels */
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#endif
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/* Cache the width of the title string in pixels/characters */
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int title_width;
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list_get_icon *callback_get_item_icon;
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list_get_name *callback_get_item_name;
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struct screen * display;
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/* The data that will be passed to the callback function YOU implement */
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void * data;
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/* The optional title, set to NULL for none */
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char * title;
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/* Optional title icon */
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enum themable_icons title_icon;
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bool show_selection_marker; /* set to true by default */
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};
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/*
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* Sets the numbers of items the list can currently display
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* note that the list's context like the currently pointed item is resetted
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* - gui_list : the list structure
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* - nb_items : the numbers of items you want
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*/
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#define gui_list_set_nb_items(gui_list, nb) \
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(gui_list)->nb_items = nb
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/*
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* Returns the numbers of items currently in the list
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* - gui_list : the list structure
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*/
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#define gui_list_get_nb_items(gui_list) \
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(gui_list)->nb_items
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/*
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* Sets the icon callback function
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* - gui_list : the list structure
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* - _callback : the callback function
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*/
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#define gui_list_set_icon_callback(gui_list, _callback) \
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(gui_list)->callback_get_item_icon=_callback
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/*
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* Gives the position of the selected item
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* - gui_list : the list structure
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* Returns the position
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*/
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#define gui_list_get_sel_pos(gui_list) \
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(gui_list)->selected_item
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#ifdef HAVE_LCD_BITMAP
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/* parse global setting to static int */
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extern void gui_list_screen_scroll_step(int ofs);
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/* parse global setting to static bool */
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extern void gui_list_screen_scroll_out_of_view(bool enable);
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#endif /* HAVE_LCD_BITMAP */
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/*
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* Tells the list wether it should stop when reaching the top/bottom
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* or should continue (by going to bottom/top)
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* - gui_list : the list structure
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* - scroll :
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* - true : stops when reaching top/bottom
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* - false : continues to go to bottom/top when reaching top/bottom
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*/
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#define gui_list_limit_scroll(gui_list, scroll) \
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(gui_list)->limit_scroll=scroll
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/*
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* This part handles as many lists as there are connected screens
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* (the api is similar to the ones above)
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* The lists on the screens are synchronized ;
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* theirs items and selected items are the same, but of course,
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* they can be displayed on screens with different sizes
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* The final aim is to let the programmer handle many lists in one
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* function call and make its code independant from the number of screens
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*/
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struct gui_synclist
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{
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struct gui_list gui_list[NB_SCREENS];
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};
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extern void gui_synclist_init(
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struct gui_synclist * lists,
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list_get_name callback_get_item_name,
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void * data,
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bool scroll_all,
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int selected_size
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);
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extern void gui_synclist_set_nb_items(struct gui_synclist * lists, int nb_items);
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extern void gui_synclist_set_icon_callback(struct gui_synclist * lists, list_get_icon icon_callback);
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extern int gui_synclist_get_nb_items(struct gui_synclist * lists);
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extern int gui_synclist_get_sel_pos(struct gui_synclist * lists);
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extern void gui_synclist_draw(struct gui_synclist * lists);
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extern void gui_synclist_select_item(struct gui_synclist * lists,
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int item_number);
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extern void gui_synclist_add_item(struct gui_synclist * lists);
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extern void gui_synclist_del_item(struct gui_synclist * lists);
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extern void gui_synclist_limit_scroll(struct gui_synclist * lists, bool scroll);
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extern void gui_synclist_flash(struct gui_synclist * lists);
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extern void gui_synclist_set_title(struct gui_synclist * lists, char * title,
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int icon);
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extern void gui_synclist_hide_selection_marker(struct gui_synclist *lists,
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bool hide);
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/*
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* Do the action implied by the given button,
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* returns the action taken if any, 0 else
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* - lists : the synchronized lists
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* - button : the keycode of a pressed button
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* - specifies weather to allow the list to wrap or not, values at top of page
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* returned value :
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* - ACTION_STD_NEXT when moving forward (next item or pgup)
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* - ACTION_STD_PREV when moving backward (previous item or pgdown)
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*/
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extern unsigned gui_synclist_do_button(struct gui_synclist * lists,
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unsigned button,
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enum list_wrap);
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#endif /* _GUI_LIST_H_ */
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