311d048f6f
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17944 a1c6a512-1295-4272-9138-f99709370657
257 lines
10 KiB
C
257 lines
10 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 three callback function :
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* one to get the text, one to get the icon and one to get the color
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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 you
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* initialized it
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* Returns a pointer to the icon, the value inside it is used to display the
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* 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 you
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* 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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* - buffer_len : length of the buffer
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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, void * data,
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char * buffer, size_t buffer_len);
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/*
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* Voice callback
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* - selected_item : an integer that tells the number of the item to speak
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* - data : a void pointer to the data you gave to the list when you
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* initialized it
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* Returns an integer, 0 means success, ignored really...
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*/
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typedef int list_speak_item(int selected_item, void * data);
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#ifdef HAVE_LCD_COLOR
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/*
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* Color 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 you
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* initialized it
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* Returns an int with the lower 16 bits representing the color to display the
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* selected item, negative value for default coloring.
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*/
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typedef int list_get_color(int selected_item, void * data);
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#endif
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struct gui_synclist
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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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int nb_items;
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int selected_item;
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int start_item[NB_SCREENS]; /* 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[NB_SCREENS];
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#ifdef HAVE_LCD_BITMAP
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int offset_position[NB_SCREENS]; /* 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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long scheduled_talk_tick, last_talked_tick;
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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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list_speak_item *callback_speak_item;
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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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#ifdef HAVE_LCD_COLOR
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int title_color;
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list_get_color *callback_get_item_color;
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#endif
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struct viewport *parent[NB_SCREENS];
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};
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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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void list_init_viewports(struct gui_synclist * lists);
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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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struct viewport parent[NB_SCREENS] /* NOTE: new screens should NOT set this to NULL */
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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 void gui_synclist_set_voice_callback(struct gui_synclist * lists, list_speak_item voice_callback);
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#ifdef HAVE_LCD_COLOR
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extern void gui_synclist_set_color_callback(struct gui_synclist * lists, list_get_color color_callback);
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#endif
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extern void gui_synclist_speak_item(struct gui_synclist * lists);
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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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extern bool gui_synclist_item_is_onscreen(struct gui_synclist *lists,
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enum screen_type screen, int item);
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/*
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* Do the action implied by the given button,
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* returns true if the action was handled.
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* NOTE: *action may be changed regardless of return value
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*/
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extern bool gui_synclist_do_button(struct gui_synclist * lists,
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unsigned *action,
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enum list_wrap);
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/* If the list has a pending postponed scheduled announcement, that
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may become due before the next get_action tmieout. This function
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adjusts the get_action timeout appropriately. */
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extern int list_do_action_timeout(struct gui_synclist *lists, int timeout);
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/* This one combines a get_action call (with timeout overridden by
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list_do_action_timeout) with the gui_synclist_do_button call, for
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convenience. */
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extern bool list_do_action(int context, int timeout,
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struct gui_synclist *lists, int *action,
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enum list_wrap wrap);
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/** Simplelist implementation.
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USe this if you dont need to reimplement the list code,
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and just need to show a list
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**/
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struct simplelist_info {
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char *title; /* title to show on the list */
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int count; /* number of items in the list, each item is selection_size high */
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char selection_size; /* list selection size, usually 1 */
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bool hide_selection;
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bool scroll_all;
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int timeout;
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int start_selection; /* the item to select when the list is first displayed */
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int (*action_callback)(int action, struct gui_synclist *lists); /* can be NULL */
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/* action_callback notes:
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action == the action pressed by the user
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_after_ gui_synclist_do_button returns.
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lists == the lists sturct so the callack can get selection and count etc. */
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list_get_icon *get_icon; /* can be NULL */
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list_get_name *get_name; /* NULL if you're using simplelist_addline() */
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list_speak_item *get_talk; /* can be NULL to not speak */
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void *callback_data; /* data for callbacks */
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};
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#define SIMPLELIST_MAX_LINES 32
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#define SIMPLELIST_MAX_LINELENGTH 32
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/** The next three functions are used if the text is mostly static.
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These should be called in the action callback for the list.
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**/
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/* set the amount of lines shown in the list
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Only needed if simplelist_info.get_name == NULL */
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void simplelist_set_line_count(int lines);
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/* get the current amount of lines shown */
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int simplelist_get_line_count(void);
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/* add/edit a line in the list.
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if line_number > number of lines shown it adds the line, else it edits the line */
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#define SIMPLELIST_ADD_LINE (SIMPLELIST_MAX_LINES+1)
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void simplelist_addline(int line_number, const char *fmt, ...);
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/* setup the info struct. members not setup in this function need to be assigned manually
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members set in this function:
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info.selection_size = 1;
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info.hide_selection = false;
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info.scroll_all = false;
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info.action_callback = NULL;
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info.get_icon = NULL;
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info.get_name = NULL;
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info.get_voice = NULL;
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info.timeout = HZ/10;
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info.start_selection = 0;
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*/
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void simplelist_info_init(struct simplelist_info *info, char* title,
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int count, void* data);
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/* show a list.
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if list->action_callback != NULL it is called with the action ACTION_REDRAW
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before the list is dislplayed for the first time */
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bool simplelist_show_list(struct simplelist_info *info);
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#endif /* _GUI_LIST_H_ */
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