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rockbox/apps/gui/list.c
Thomas Martitz b673ae2c46 FS#11686 - Kinetic list scrolling for touchscreen 
This adds kinetic scrolling to to lists on touchscreen targets and RaaA, like all other OSes on touchscreens have.
It's only enabled in the absolute point mode, so for non-touchscreen and in grid mode nothing changes.

Kinetic scrolling means that the list keeps scrolling (but is decelerating) after you leave the touchscreen with the finger.
Redraw interval and deceleration is hardcoded for now but could be made configurable if desired.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28408 a1c6a512-1295-4272-9138-f99709370657
2010-10-31 11:11:46 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Kevin Ferrare
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdarg.h>
#include <stdio.h>
#include "config.h"
#include "lcd.h"
#include "font.h"
#include "button.h"
#include "string.h"
#include "settings.h"
#include "kernel.h"
#include "system.h"
#include "action.h"
#include "screen_access.h"
#include "list.h"
#include "scrollbar.h"
#include "lang.h"
#include "sound.h"
#include "misc.h"
#include "talk.h"
#include "viewport.h"
#include "appevents.h"
#include "statusbar-skinned.h"
/* The minimum number of pending button events in queue before starting
* to limit list drawing interval.
*/
#define FRAMEDROP_TRIGGER 6
#ifdef HAVE_LCD_BITMAP
static int offset_step = 16; /* pixels per screen scroll step */
/* should lines scroll out of the screen */
static bool offset_out_of_view = false;
#endif
static void gui_list_select_at_offset(struct gui_synclist * gui_list,
int offset);
void list_draw(struct screen *display, struct gui_synclist *list);
#ifdef HAVE_LCD_BITMAP
static int list_need_reinit = false;
static struct viewport parent[NB_SCREENS];
static void list_force_reinit(void *param)
{
(void)param;
list_need_reinit = true;
}
void list_init(void)
{
add_event(GUI_EVENT_THEME_CHANGED, false, list_force_reinit);
}
static void list_init_viewports(struct gui_synclist *list)
{
int i, parent_used;
if (!list)
return;
parent_used = (*list->parent != &parent[SCREEN_MAIN]);
if (!parent_used)
{
FOR_NB_SCREENS(i)
{
list->parent[i] = &parent[i];
viewport_set_defaults(&parent[i], i);
#ifdef HAVE_BUTTONBAR
if (screens[i].has_buttonbar)
list->parent[i]->height -= BUTTONBAR_HEIGHT;
#endif
}
}
list_need_reinit = false;
}
#else
static struct viewport parent[NB_SCREENS] =
{
[SCREEN_MAIN] =
{
.x = 0,
.y = 0,
.width = LCD_WIDTH,
.height = LCD_HEIGHT
},
};
#define list_init_viewports(a)
#endif
#ifdef HAVE_LCD_BITMAP
bool list_display_title(struct gui_synclist *list, enum screen_type screen)
{
return list->title != NULL &&
!sb_set_title_text(list->title, list->title_icon, screen) &&
viewport_get_nb_lines(list->parent[screen]) > 2;
}
static int list_get_nb_lines(struct gui_synclist *list, enum screen_type screen)
{
struct viewport vp = *list->parent[screen];
if (list_display_title(list, screen))
vp.height -= font_get(list->parent[screen]->font)->height;
return viewport_get_nb_lines(&vp);
}
#else
#define list_display_title(l, i) false
#define list_get_nb_lines(list, screen) \
viewport_get_nb_lines((list)->parent[(screen)]);
#endif
/*
* Initializes a scrolling list
* - gui_list : the list structure to initialize
* - callback_get_item_name : pointer to a function that associates a label
* to a given item number
* - data : extra data passed to the list callback
* - scroll_all :
* - selected_size :
* - parent : the parent viewports to use. NULL means the full screen minus
* statusbar if enabled. NOTE: new screens should NOT set this to NULL.
*/
void gui_synclist_init(struct gui_synclist * gui_list,
list_get_name callback_get_item_name,
void * data,
bool scroll_all,
int selected_size, struct viewport list_parent[NB_SCREENS]
)
{
int i;
gui_list->callback_get_item_icon = NULL;
gui_list->callback_get_item_name = callback_get_item_name;
gui_list->callback_speak_item = NULL;
gui_list->nb_items = 0;
gui_list->selected_item = 0;
FOR_NB_SCREENS(i)
{
gui_list->start_item[i] = 0;
#ifdef HAVE_LCD_BITMAP
gui_list->offset_position[i] = 0;
#endif
if (list_parent)
gui_list->parent[i] = &list_parent[i];
else
gui_list->parent[i] = &parent[i];
}
list_init_viewports(gui_list);
gui_list->limit_scroll = false;
gui_list->data = data;
gui_list->scroll_all = scroll_all;
gui_list->selected_size = selected_size;
gui_list->title = NULL;
gui_list->title_icon = Icon_NOICON;
gui_list->scheduled_talk_tick = gui_list->last_talked_tick = 0;
gui_list->show_selection_marker = true;
#ifdef HAVE_LCD_COLOR
gui_list->title_color = -1;
gui_list->callback_get_item_color = NULL;
#endif
}
/* this toggles the selection bar or cursor */
void gui_synclist_hide_selection_marker(struct gui_synclist * lists, bool hide)
{
lists->show_selection_marker = !hide;
}
#ifdef HAVE_LCD_BITMAP
int gui_list_get_item_offset(struct gui_synclist * gui_list,
int item_width,
int text_pos,
struct screen * display,
struct viewport *vp)
{
int item_offset;
if (offset_out_of_view)
{
item_offset = gui_list->offset_position[display->screen_type];
}
else
{
/* if text is smaller than view */
if (item_width <= vp->width - text_pos)
{
item_offset = 0;
}
/* if text got out of view */
else if (gui_list->offset_position[display->screen_type] >
item_width - (vp->width - text_pos))
{
item_offset = item_width - (vp->width - text_pos);
}
else
item_offset = gui_list->offset_position[display->screen_type];
}
return item_offset;
}
#endif
/*
* Force a full screen update.
*/
void gui_synclist_draw(struct gui_synclist *gui_list)
{
int i;
#ifdef HAVE_LCD_BITMAP
if (list_need_reinit)
{
list_init_viewports(gui_list);
gui_synclist_select_item(gui_list, gui_list->selected_item);
}
#endif
FOR_NB_SCREENS(i)
{
list_draw(&screens[i], gui_list);
}
}
/* sets up the list so the selection is shown correctly on the screen */
static void gui_list_put_selection_on_screen(struct gui_synclist * gui_list,
enum screen_type screen)
{
int nb_lines = list_get_nb_lines(gui_list, screen);
int bottom = MAX(0, gui_list->nb_items - nb_lines);
int new_start_item = gui_list->start_item[screen];
int difference = gui_list->selected_item - gui_list->start_item[screen];
#ifdef HAVE_LCD_CHARCELLS
const int scroll_limit_up = 0;
const int scroll_limit_down = 1;
#else
const int scroll_limit_up = (nb_lines < gui_list->selected_size+2 ? 0:1);
const int scroll_limit_down = (scroll_limit_up+gui_list->selected_size);
#endif
if (gui_list->show_selection_marker == false)
{
new_start_item = gui_list->selected_item;
}
else if (gui_list->selected_size >= nb_lines)
{
new_start_item = gui_list->selected_item;
}
else if (global_settings.scroll_paginated)
{
nb_lines -= nb_lines%gui_list->selected_size;
if (difference < 0 || difference >= nb_lines)
{
new_start_item = gui_list->selected_item -
(gui_list->selected_item%nb_lines);
}
}
else if (difference <= scroll_limit_up) /* list moved up */
{
new_start_item = gui_list->selected_item - scroll_limit_up;
}
else if (difference > nb_lines - scroll_limit_down) /* list moved down */
{
new_start_item = gui_list->selected_item + scroll_limit_down - nb_lines;
}
if (new_start_item < 0)
gui_list->start_item[screen] = 0;
else if (new_start_item > bottom)
gui_list->start_item[screen] = bottom;
else
gui_list->start_item[screen] = new_start_item;
}
static void _gui_synclist_speak_item(struct gui_synclist *lists)
{
list_speak_item *cb = lists->callback_speak_item;
if (cb && lists->nb_items != 0)
{
talk_shutup();
/* If we have just very recently started talking, then we want
to stay silent for a while until things settle. Likewise if
we already had a pending scheduled announcement not yet due
we need to reschedule it. */
if ((lists->scheduled_talk_tick &&
TIME_BEFORE(current_tick, lists->scheduled_talk_tick)) ||
(lists->last_talked_tick &&
TIME_BEFORE(current_tick, lists->last_talked_tick + HZ/5)))
{
lists->scheduled_talk_tick = current_tick + HZ/5;
}
else
{
lists->scheduled_talk_tick = 0; /* work done */
cb(lists->selected_item, lists->data);
lists->last_talked_tick = current_tick;
}
}
}
void gui_synclist_speak_item(struct gui_synclist *lists)
{
if (global_settings.talk_menu)
{
if (lists->nb_items == 0)
talk_id(VOICE_EMPTY_LIST, true);
else
_gui_synclist_speak_item(lists);
}
}
/*
* Selects an item in the list
* - gui_list : the list structure
* - item_number : the number of the item which will be selected
*/
void gui_synclist_select_item(struct gui_synclist * gui_list, int item_number)
{
int i;
if (item_number >= gui_list->nb_items || item_number < 0)
return;
if (item_number != gui_list->selected_item)
{
gui_list->selected_item = item_number;
_gui_synclist_speak_item(gui_list);
}
FOR_NB_SCREENS(i)
gui_list_put_selection_on_screen(gui_list, i);
}
static void gui_list_select_at_offset(struct gui_synclist * gui_list,
int offset)
{
int new_selection;
if (gui_list->selected_size > 1)
{
offset *= gui_list->selected_size;
}
new_selection = gui_list->selected_item + offset;
if (new_selection >= gui_list->nb_items)
{
new_selection = gui_list->limit_scroll ?
gui_list->nb_items - gui_list->selected_size : 0;
}
else if (new_selection < 0)
{
new_selection = gui_list->limit_scroll ?
0 : gui_list->nb_items - gui_list->selected_size;
}
else if (gui_list->show_selection_marker == false)
{
int i, nb_lines, screen_top;
FOR_NB_SCREENS(i)
{
nb_lines = list_get_nb_lines(gui_list, i);
if (offset > 0)
{
screen_top = MAX(0, gui_list->nb_items - nb_lines);
gui_list->start_item[i] = MIN(screen_top, gui_list->start_item[i] +
gui_list->selected_size);
gui_list->selected_item = gui_list->start_item[i];
}
else
{
gui_list->start_item[i] = MAX(0, gui_list->start_item[i] -
gui_list->selected_size);
gui_list->selected_item = gui_list->start_item[i] + nb_lines;
}
}
return;
}
gui_synclist_select_item(gui_list, new_selection);
}
/*
* Adds an item to the list (the callback will be asked for one more item)
* - gui_list : the list structure
*/
void gui_synclist_add_item(struct gui_synclist * gui_list)
{
gui_list->nb_items++;
/* if only one item in the list, select it */
if (gui_list->nb_items == 1)
gui_list->selected_item = 0;
}
/*
* Removes an item to the list (the callback will be asked for one less item)
* - gui_list : the list structure
*/
void gui_synclist_del_item(struct gui_synclist * gui_list)
{
if (gui_list->nb_items > 0)
{
if (gui_list->selected_item == gui_list->nb_items-1)
gui_list->selected_item--;
gui_list->nb_items--;
gui_synclist_select_item(gui_list, gui_list->selected_item);
}
}
#ifdef HAVE_LCD_BITMAP
void gui_list_screen_scroll_step(int ofs)
{
offset_step = ofs;
}
void gui_list_screen_scroll_out_of_view(bool enable)
{
offset_out_of_view = enable;
}
#endif /* HAVE_LCD_BITMAP */
/*
* Set the title and title icon of the list. Setting title to NULL disables
* both the title and icon. Use NOICON if there is no icon.
*/
void gui_synclist_set_title(struct gui_synclist * gui_list,
char * title, enum themable_icons icon)
{
gui_list->title = title;
gui_list->title_icon = icon;
#ifdef HAVE_LCD_BITMAP
int i;
FOR_NB_SCREENS(i)
sb_set_title_text(title, icon, i);
#endif
send_event(GUI_EVENT_ACTIONUPDATE, (void*)1);
}
void gui_synclist_set_nb_items(struct gui_synclist * lists, int nb_items)
{
#ifdef HAVE_LCD_BITMAP
int i;
#endif
lists->nb_items = nb_items;
#ifdef HAVE_LCD_BITMAP
FOR_NB_SCREENS(i)
{
lists->offset_position[i] = 0;
}
#endif
}
int gui_synclist_get_nb_items(struct gui_synclist * lists)
{
return lists->nb_items;
}
int gui_synclist_get_sel_pos(struct gui_synclist * lists)
{
return lists->selected_item;
}
void gui_synclist_set_icon_callback(struct gui_synclist * lists,
list_get_icon icon_callback)
{
lists->callback_get_item_icon = icon_callback;
}
void gui_synclist_set_voice_callback(struct gui_synclist * lists,
list_speak_item voice_callback)
{
lists->callback_speak_item = voice_callback;
}
#ifdef HAVE_LCD_COLOR
void gui_synclist_set_color_callback(struct gui_synclist * lists,
list_get_color color_callback)
{
lists->callback_get_item_color = color_callback;
}
#endif
static void gui_synclist_select_next_page(struct gui_synclist * lists,
enum screen_type screen)
{
int nb_lines = list_get_nb_lines(lists, screen);
if (lists->selected_size > 1)
nb_lines = MAX(1, nb_lines/lists->selected_size);
gui_list_select_at_offset(lists, nb_lines);
}
static void gui_synclist_select_previous_page(struct gui_synclist * lists,
enum screen_type screen)
{
int nb_lines = list_get_nb_lines(lists, screen);
if (lists->selected_size > 1)
nb_lines = MAX(1, nb_lines/lists->selected_size);
gui_list_select_at_offset(lists, -nb_lines);
}
void gui_synclist_limit_scroll(struct gui_synclist * lists, bool scroll)
{
lists->limit_scroll = scroll;
}
#ifdef HAVE_LCD_BITMAP
/*
* Makes all the item in the list scroll by one step to the right.
* Should stop increasing the value when reaching the widest item value
* in the list.
*/
static void gui_synclist_scroll_right(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
{
/* FIXME: This is a fake right boundry limiter. there should be some
* callback function to find the longest item on the list in pixels,
* to stop the list from scrolling past that point */
lists->offset_position[i] += offset_step;
if (lists->offset_position[i] > 1000)
lists->offset_position[i] = 1000;
}
}
/*
* Makes all the item in the list scroll by one step to the left.
* stops at starting position.
*/
static void gui_synclist_scroll_left(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
{
lists->offset_position[i] -= offset_step;
if (lists->offset_position[i] < 0)
lists->offset_position[i] = 0;
}
}
#endif /* HAVE_LCD_BITMAP */
bool gui_synclist_do_button(struct gui_synclist * lists,
int *actionptr, enum list_wrap wrap)
{
int action = *actionptr;
#ifdef HAVE_LCD_BITMAP
static bool scrolling_left = false;
#endif
#ifdef HAVE_WHEEL_ACCELERATION
int next_item_modifier = button_apply_acceleration(get_action_data());
#else
static int next_item_modifier = 1;
static int last_accel_tick = 0;
if (action != ACTION_TOUCHSCREEN)
{
if (global_settings.list_accel_start_delay)
{
int start_delay = global_settings.list_accel_start_delay * (HZ/2);
int accel_wait = global_settings.list_accel_wait * HZ/2;
if (get_action_statuscode(NULL)&ACTION_REPEAT)
{
if (!last_accel_tick)
last_accel_tick = current_tick + start_delay;
else if (TIME_AFTER(current_tick, last_accel_tick + accel_wait))
{
last_accel_tick = current_tick;
next_item_modifier++;
}
}
else if (last_accel_tick)
{
next_item_modifier = 1;
last_accel_tick = 0;
}
}
}
#endif
#if defined(HAVE_TOUCHSCREEN)
if (action == ACTION_TOUCHSCREEN)
action = *actionptr = gui_synclist_do_touchscreen(lists);
else if (action > ACTION_TOUCHSCREEN_MODE)
/* cancel kinetic if we got a normal button event */
_gui_synclist_stop_kinetic_scrolling();
#endif
switch (wrap)
{
case LIST_WRAP_ON:
gui_synclist_limit_scroll(lists, false);
break;
case LIST_WRAP_OFF:
gui_synclist_limit_scroll(lists, true);
break;
case LIST_WRAP_UNLESS_HELD:
if (action == ACTION_STD_PREVREPEAT ||
action == ACTION_STD_NEXTREPEAT ||
action == ACTION_LISTTREE_PGUP ||
action == ACTION_LISTTREE_PGDOWN)
gui_synclist_limit_scroll(lists, true);
else gui_synclist_limit_scroll(lists, false);
break;
};
switch (action)
{
case ACTION_REDRAW:
gui_synclist_draw(lists);
return true;
#ifdef HAVE_VOLUME_IN_LIST
case ACTION_LIST_VOLUP:
global_settings.volume += 2;
/* up two because the falthrough brings it down one */
case ACTION_LIST_VOLDOWN:
global_settings.volume--;
setvol();
return true;
#endif
case ACTION_STD_PREV:
case ACTION_STD_PREVREPEAT:
gui_list_select_at_offset(lists, -next_item_modifier);
#ifndef HAVE_WHEEL_ACCELERATION
if (button_queue_count() < FRAMEDROP_TRIGGER)
#endif
gui_synclist_draw(lists);
yield();
*actionptr = ACTION_STD_PREV;
return true;
case ACTION_STD_NEXT:
case ACTION_STD_NEXTREPEAT:
gui_list_select_at_offset(lists, next_item_modifier);
#ifndef HAVE_WHEEL_ACCELERATION
if (button_queue_count() < FRAMEDROP_TRIGGER)
#endif
gui_synclist_draw(lists);
yield();
*actionptr = ACTION_STD_NEXT;
return true;
#ifdef HAVE_LCD_BITMAP
case ACTION_TREE_PGRIGHT:
gui_synclist_scroll_right(lists);
gui_synclist_draw(lists);
return true;
case ACTION_TREE_ROOT_INIT:
/* After this button press ACTION_TREE_PGLEFT is allowed
to skip to root. ACTION_TREE_ROOT_INIT must be defined in the
keymaps as a repeated button press (the same as the repeated
ACTION_TREE_PGLEFT) with the pre condition being the non-repeated
button press */
if (lists->offset_position[0] == 0)
{
scrolling_left = false;
*actionptr = ACTION_STD_CANCEL;
return true;
}
*actionptr = ACTION_TREE_PGLEFT;
case ACTION_TREE_PGLEFT:
if(!scrolling_left && (lists->offset_position[0] == 0))
{
*actionptr = ACTION_STD_CANCEL;
return false;
}
gui_synclist_scroll_left(lists);
gui_synclist_draw(lists);
scrolling_left = true; /* stop ACTION_TREE_PAGE_LEFT
skipping to root */
return true;
#endif
/* for pgup / pgdown, we are obliged to have a different behaviour depending
* on the screen for which the user pressed the key since for example, remote
* and main screen doesn't have the same number of lines */
case ACTION_LISTTREE_PGUP:
{
int screen =
#ifdef HAVE_REMOTE_LCD
get_action_statuscode(NULL)&ACTION_REMOTE ?
SCREEN_REMOTE :
#endif
SCREEN_MAIN;
gui_synclist_select_previous_page(lists, screen);
gui_synclist_draw(lists);
yield();
*actionptr = ACTION_STD_NEXT;
}
return true;
case ACTION_LISTTREE_PGDOWN:
{
int screen =
#ifdef HAVE_REMOTE_LCD
get_action_statuscode(NULL)&ACTION_REMOTE ?
SCREEN_REMOTE :
#endif
SCREEN_MAIN;
gui_synclist_select_next_page(lists, screen);
gui_synclist_draw(lists);
yield();
*actionptr = ACTION_STD_PREV;
}
return true;
}
if(lists->scheduled_talk_tick
&& TIME_AFTER(current_tick, lists->scheduled_talk_tick))
/* scheduled postponed item announcement is due */
_gui_synclist_speak_item(lists);
return false;
}
int list_do_action_timeout(struct gui_synclist *lists, int timeout)
/* Returns the lowest of timeout or the delay until a postponed
scheduled announcement is due (if any). */
{
if(lists->scheduled_talk_tick)
{
long delay = lists->scheduled_talk_tick -current_tick +1;
/* +1 because the trigger condition uses TIME_AFTER(), which
is implemented as strictly greater than. */
if(delay < 0)
delay = 0;
if(timeout > delay || timeout == TIMEOUT_BLOCK)
timeout = delay;
}
return timeout;
}
bool list_do_action(int context, int timeout,
struct gui_synclist *lists, int *action,
enum list_wrap wrap)
/* Combines the get_action() (with possibly overridden timeout) and
gui_synclist_do_button() calls. Returns the list action from
do_button, and places the action from get_action in *action. */
{
timeout = list_do_action_timeout(lists, timeout);
*action = get_action(context, timeout);
return gui_synclist_do_button(lists, action, wrap);
}
bool gui_synclist_item_is_onscreen(struct gui_synclist *lists,
enum screen_type screen, int item)
{
int nb_lines = list_get_nb_lines(lists, screen);
return (unsigned)(item - lists->start_item[screen]) < (unsigned) nb_lines;
}
/* Simple use list implementation */
static int simplelist_line_count = 0;
static char simplelist_text[SIMPLELIST_MAX_LINES][SIMPLELIST_MAX_LINELENGTH];
/* set the amount of lines shown in the list */
void simplelist_set_line_count(int lines)
{
if (lines < 0)
simplelist_line_count = 0;
else if (lines >= SIMPLELIST_MAX_LINES)
simplelist_line_count = SIMPLELIST_MAX_LINES;
else
simplelist_line_count = lines;
}
/* get the current amount of lines shown */
int simplelist_get_line_count(void)
{
return simplelist_line_count;
}
/* add/edit a line in the list.
if line_number > number of lines shown it adds the line,
else it edits the line */
void simplelist_addline(int line_number, const char *fmt, ...)
{
va_list ap;
if (line_number > simplelist_line_count)
{
if (simplelist_line_count < SIMPLELIST_MAX_LINES)
line_number = simplelist_line_count++;
else
return;
}
va_start(ap, fmt);
vsnprintf(simplelist_text[line_number], SIMPLELIST_MAX_LINELENGTH, fmt, ap);
va_end(ap);
}
static const char* simplelist_static_getname(int item,
void * data,
char *buffer,
size_t buffer_len)
{
(void)data; (void)buffer; (void)buffer_len;
return simplelist_text[item];
}
bool simplelist_show_list(struct simplelist_info *info)
{
struct gui_synclist lists;
int action, old_line_count = simplelist_line_count, i;
list_get_name *getname;
int wrap = LIST_WRAP_UNLESS_HELD;
if (info->get_name)
getname = info->get_name;
else
getname = simplelist_static_getname;
FOR_NB_SCREENS(i)
viewportmanager_theme_enable(i, true, NULL);
gui_synclist_init(&lists, getname, info->callback_data,
info->scroll_all, info->selection_size, NULL);
if (info->title)
gui_synclist_set_title(&lists, info->title, NOICON);
if (info->get_icon)
gui_synclist_set_icon_callback(&lists, info->get_icon);
if (info->get_talk)
gui_synclist_set_voice_callback(&lists, info->get_talk);
if (info->hide_selection)
{
gui_synclist_hide_selection_marker(&lists, true);
wrap = LIST_WRAP_OFF;
}
if (info->action_callback)
info->action_callback(ACTION_REDRAW, &lists);
if (info->get_name == NULL)
gui_synclist_set_nb_items(&lists,
simplelist_line_count*info->selection_size);
else
gui_synclist_set_nb_items(&lists, info->count*info->selection_size);
gui_synclist_select_item(&lists, info->selection);
gui_synclist_draw(&lists);
gui_synclist_speak_item(&lists);
while(1)
{
list_do_action(CONTEXT_LIST, info->timeout,
&lists, &action, wrap);
/* We must yield in this case or no other thread can run */
if (info->timeout == TIMEOUT_NOBLOCK)
yield();
if (info->action_callback)
{
bool stdok = action==ACTION_STD_OK;
action = info->action_callback(action, &lists);
if (stdok && action == ACTION_STD_CANCEL)
{
/* callback asked us to exit */
info->selection = gui_synclist_get_sel_pos(&lists);
break;
}
if (info->get_name == NULL)
gui_synclist_set_nb_items(&lists,
simplelist_line_count*info->selection_size);
}
if (action == ACTION_STD_CANCEL)
{
info->selection = -1;
break;
}
else if ((action == ACTION_REDRAW) ||
(old_line_count != simplelist_line_count))
{
if (info->get_name == NULL)
{
gui_synclist_set_nb_items(&lists,
simplelist_line_count*info->selection_size);
}
gui_synclist_draw(&lists);
old_line_count = simplelist_line_count;
}
else if(default_event_handler(action) == SYS_USB_CONNECTED)
return true;
}
talk_shutup();
FOR_NB_SCREENS(i)
viewportmanager_theme_undo(i, false);
return false;
}
void simplelist_info_init(struct simplelist_info *info, char* title,
int count, void* data)
{
info->title = title;
info->count = count;
info->selection_size = 1;
info->hide_selection = false;
info->scroll_all = false;
info->timeout = HZ/10;
info->selection = 0;
info->action_callback = NULL;
info->get_icon = NULL;
info->get_name = NULL;
info->get_talk = NULL;
info->callback_data = data;
simplelist_line_count = 0;
}
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