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rockbox/apps/gui/list.c
Aidan MacDonald 5b27e2255a Add perceptual volume adjustment 
The perceived loudness change of a change in volume depends
on the listening volume: at high volumes a 1 dB increment is
noticeable, but at low volumes a larger increment is needed
to get a comparable change in loudness.

Perceptual volume adjustment accounts for this fact, and
divides the hardware volume range into a number of steps.
Each step changes the dB volume by a variable amount, with
most of the steps concentrated at higher volumes. This
makes it possible to sweep over the entire hardware volume
range quickly, without losing the ability to finely adjust
the volume at normal listening levels.

Use "Volume Adjustment Mode" in the system settings menu
to select perceptual volume mode. The number of steps used
is controlled by "Number of Volume Steps". (Number of steps
has no effect in direct adjustment mode.)

It's still possible to set a specific dB volume level from
the sound settings menu when perceptual volume is enabled,
and perceptual volume does not affect the volume displayed
by themes.

Change-Id: I6f91fd3f7c5e2d323a914e47b5653033e92b4b3b
2023-01-22 21:19:57 +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
void list_draw(struct screen *display, struct gui_synclist *list);
static long last_dirty_tick;
static struct viewport parent[NB_SCREENS];
static bool list_is_dirty(struct gui_synclist *list)
{
return TIME_BEFORE(list->dirty_tick, last_dirty_tick);
}
static void list_force_reinit(unsigned short id, void *param, void *last_dirty_tick)
{
(void)id;
(void)param;
*(int *)last_dirty_tick = current_tick;
}
void list_init(void)
{
last_dirty_tick = current_tick;
add_event_ex(GUI_EVENT_THEME_CHANGED, false, list_force_reinit, &last_dirty_tick);
}
static void list_init_viewports(struct gui_synclist *list)
{
bool parent_used = (*list->parent == &parent[SCREEN_MAIN]);
if (parent_used)
{
FOR_NB_SCREENS(i)
{
gui_synclist_set_viewport_defaults(list->parent[i], i);
}
}
list->dirty_tick = current_tick;
}
static int list_nb_lines(struct gui_synclist *list, enum screen_type screen)
{
struct viewport *vp = list->parent[screen];
return vp->height / list->line_height[screen];
}
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) &&
list_nb_lines(list, screen) > 2;
}
int list_get_nb_lines(struct gui_synclist *list, enum screen_type screen)
{
int lines = skinlist_get_line_count(screen, list);
if (lines < 0)
{
lines = list_nb_lines(list, screen);
if (list_display_title(list, screen))
lines -= 1;
}
return lines;
}
void list_init_item_height(struct gui_synclist *list, enum screen_type screen)
{
struct viewport *vp = list->parent[screen];
#ifdef HAVE_TOUCHSCREEN
/* the 4/12 factor is designed for reasonable item size on a 160dpi screen */
if (global_settings.list_line_padding == -1)
list->line_height[screen] = MAX(lcd_get_dpi()*4/12, (int)font_get(vp->font)->height);
else
list->line_height[screen] = font_get(vp->font)->height + global_settings.list_line_padding;
#else
list->line_height[screen] = font_get(vp->font)->height;
#endif
}
static void gui_synclist_init_display_settings(struct gui_synclist * list)
{
struct user_settings *gs = &global_settings;
list->scrollbar = gs->scrollbar;
list->show_icons = gs->show_icons;
list->scroll_paginated = gs->scroll_paginated;
list->keyclick = gs->keyclick;
list->talk_menu = gs->talk_menu;
list->wraparound = gs->list_wraparound;
list->cursor_style = gs->cursor_style;
}
/*
* 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]
)
{
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->callback_draw_item = NULL;
gui_list->nb_items = 0;
gui_list->selected_item = 0;
gui_synclist_init_display_settings(gui_list);
#ifdef HAVE_TOUCHSCREEN
gui_list->y_pos = 0;
#endif
FOR_NB_SCREENS(i)
{
gui_list->start_item[i] = 0;
gui_list->offset_position[i] = 0;
if (list_parent)
gui_list->parent[i] = &list_parent[i];
else
gui_list->parent[i] = &parent[i];
}
list_init_viewports(gui_list);
FOR_NB_SCREENS(i)
list_init_item_height(gui_list, i);
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->dirty_tick = current_tick;
#ifdef HAVE_LCD_COLOR
gui_list->title_color = -1;
gui_list->callback_get_item_color = NULL;
gui_list->selection_color = NULL;
#endif
}
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 (global_settings.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;
}
/*
* Force a full screen update.
*/
void gui_synclist_draw(struct gui_synclist *gui_list)
{
if (list_is_dirty(gui_list))
{
list_init_viewports(gui_list);
FOR_NB_SCREENS(i)
list_init_item_height(gui_list, i);
gui_synclist_select_item(gui_list, gui_list->selected_item);
}
FOR_NB_SCREENS(i)
{
if (!skinlist_draw(&screens[i], gui_list))
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];
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);
if (gui_list->selected_size >= nb_lines)
{
new_start_item = gui_list->selected_item;
}
else if (gui_list->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;
#ifdef HAVE_TOUCHSCREEN
gui_list->y_pos = gui_list->start_item[SCREEN_MAIN] * gui_list->line_height[SCREEN_MAIN];
#endif
}
static void edge_beep(struct gui_synclist * gui_list, bool wrap)
{
if (gui_list->keyclick)
{
list_speak_item *cb = gui_list->callback_speak_item;
if (!wrap) /* a bounce */
{
static long last_bounce_tick = 0;
if(TIME_BEFORE(current_tick, last_bounce_tick+HZ/4))
return;
last_bounce_tick = current_tick;
}
/* Next thing the list code will do is go speak the item, doing
a talk_shutup() first. Shutup now so the beep is clearer, and
make sure the subsequent shutup is skipped because otherwise
it'd kill the pcm buffer. */
if (cb) {
talk_shutup();
talk_force_enqueue_next();
}
system_sound_play(wrap ? SOUND_LIST_EDGE_BEEP_WRAP : SOUND_LIST_EDGE_BEEP_NOWRAP);
if (cb) {
/* On at least x5: if, instead of the above shutup, I insert a
sleep just after the beep_play() call, to delay the subsequent
shutup and talk, then in some cases the beep is not played: if
the end of a previous utterance is still playing from the pcm buf,
the beep fails, even if there would seem to remain enough time
to the utterance to mix in the beep. */
/* Somehow, the following voice utterance is suppressed on e200,
but not on x5. Work around... */
sleep((40*HZ +999)/1000); // FIXME: Is this really needed?
talk_force_shutup();
}
}
}
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 (lists->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)
{
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, bool allow_wrap)
{
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 = allow_wrap ? 0 : gui_list->nb_items - gui_list->selected_size;
edge_beep(gui_list, allow_wrap);
}
else if (new_selection < 0)
{
new_selection = allow_wrap ? gui_list->nb_items - gui_list->selected_size : 0;
edge_beep(gui_list, allow_wrap);
}
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);
}
}
/*
* 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,
const char * title, enum themable_icons icon)
{
gui_list->title = title;
gui_list->title_icon = icon;
FOR_NB_SCREENS(i)
sb_set_title_text(title, icon, i);
send_event(GUI_EVENT_ACTIONUPDATE, (void*)1);
}
void gui_synclist_set_nb_items(struct gui_synclist * lists, int nb_items)
{
lists->nb_items = nb_items;
FOR_NB_SCREENS(i)
{
lists->offset_position[i] = 0;
}
}
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;
}
void gui_synclist_set_viewport_defaults(struct viewport *vp,
enum screen_type screen)
{
viewport_set_defaults(vp, screen);
}
#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;
}
void gui_synclist_set_sel_color(struct gui_synclist * lists,
struct list_selection_color *list_sel_color)
{
lists->selection_color = list_sel_color;
if(list_sel_color)
{
FOR_NB_SCREENS(i) /* might need to be only SCREEN_MAIN */
{
lists->parent[i]->fg_pattern = list_sel_color->fg_color;
lists->parent[i]->bg_pattern = list_sel_color->bg_color;
}
}
else
list_init_viewports(lists);
}
#endif
static void gui_synclist_select_next_page(struct gui_synclist * lists,
enum screen_type screen,
bool allow_wrap)
{
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, allow_wrap);
}
static void gui_synclist_select_previous_page(struct gui_synclist * lists,
enum screen_type screen,
bool allow_wrap)
{
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, allow_wrap);
}
/*
* 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)
{
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] += global_settings.screen_scroll_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)
{
FOR_NB_SCREENS(i)
{
lists->offset_position[i] -= global_settings.screen_scroll_step;
if (lists->offset_position[i] < 0)
lists->offset_position[i] = 0;
}
}
bool gui_synclist_keyclick_callback(int action, void* data)
{
struct gui_synclist *lists = (struct gui_synclist *)data;
/* Block the beep if we're at the end of the list and we're not wrapping. */
if (lists->selected_item == 0)
{
if (action == ACTION_STD_PREVREPEAT)
return false;
if (action == ACTION_STD_PREV && !lists->wraparound)
return false;
}
if (lists->selected_item == lists->nb_items - lists->selected_size)
{
if (action == ACTION_STD_NEXTREPEAT)
return false;
if (action == ACTION_STD_NEXT && !lists->wraparound)
return false;
}
return action != ACTION_NONE;
}
/*
* Magic to make sure the list gets updated correctly if the skin does
* something naughty like a full screen update when we are in a button
* loop.
*
* The GUI_EVENT_NEED_UI_UPDATE event is registered for in list_do_action_timeout()
* and unregistered in gui_synclict_do_button(). This is done because
* if something is using the list UI they *must* be calling those
* two functions in the correct order or the list wont work.
*/
static struct gui_synclist *current_lists;
static bool ui_update_event_registered = false;
static void _lists_uiviewport_update_callback(unsigned short id, void *data)
{
(void)id;
(void)data;
if (current_lists)
gui_synclist_draw(current_lists);
}
bool gui_synclist_do_button(struct gui_synclist * lists, int *actionptr)
{
int action = *actionptr;
static bool pgleft_allow_cancel = false;
#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;
int accel_wait = global_settings.list_accel_wait * HZ;
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(lists);
#endif
/* Disable the skin redraw callback */
current_lists = NULL;
/* Prevent list wraparound by repeating actions */
bool allow_wrap = lists->wraparound;
if (action == ACTION_STD_PREVREPEAT ||
action == ACTION_STD_NEXTREPEAT ||
action == ACTION_LISTTREE_PGUP ||
action == ACTION_LISTTREE_PGDOWN)
allow_wrap = false;
switch (action)
{
case ACTION_REDRAW:
gui_synclist_draw(lists);
return true;
#ifdef HAVE_VOLUME_IN_LIST
case ACTION_LIST_VOLUP:
adjust_volume(1);
return true;
case ACTION_LIST_VOLDOWN:
adjust_volume(-1);
return true;
#endif
case ACTION_STD_PREV:
case ACTION_STD_PREVREPEAT:
gui_list_select_at_offset(lists, -next_item_modifier, allow_wrap);
#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, allow_wrap);
#ifndef HAVE_WHEEL_ACCELERATION
if (button_queue_count() < FRAMEDROP_TRIGGER)
#endif
gui_synclist_draw(lists);
yield();
*actionptr = ACTION_STD_NEXT;
return true;
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. Leave out ACTION_TREE_ROOT_INIT in your keymaps to
disable cancel action by PGLEFT key (e.g. if PGLEFT and CANCEL
are mapped to different keys) */
if (lists->offset_position[0] == 0)
{
pgleft_allow_cancel = true;
*actionptr = ACTION_STD_MENU;
return true;
}
*actionptr = ACTION_TREE_PGLEFT;
/* fallthrough */
case ACTION_TREE_PGLEFT:
if(pgleft_allow_cancel && (lists->offset_position[0] == 0))
{
*actionptr = ACTION_STD_CANCEL;
return false;
}
gui_synclist_scroll_left(lists);
gui_synclist_draw(lists);
pgleft_allow_cancel = false; /* stop ACTION_TREE_PAGE_LEFT
skipping to root */
return true;
/* 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, allow_wrap);
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, allow_wrap);
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 != current_lists)
{
if (!ui_update_event_registered)
ui_update_event_registered =
add_event(GUI_EVENT_NEED_UI_UPDATE, _lists_uiviewport_update_callback);
current_lists = lists;
}
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)
/* 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);
keyclick_set_callback(gui_synclist_keyclick_callback, lists);
*action = get_action(context, timeout);
return gui_synclist_do_button(lists, action);
}
/* Simple use list implementation */
static int simplelist_line_count = 0, simplelist_line_remaining;
static int simplelist_line_pos;
static char simplelist_buffer[SIMPLELIST_MAX_LINES * SIMPLELIST_MAX_LINELENGTH];
static char *simplelist_text[SIMPLELIST_MAX_LINES];
/* set the amount of lines shown in the list */
void simplelist_set_line_count(int lines)
{
if (lines <= 0) {
simplelist_line_pos = 0;
simplelist_line_remaining = sizeof(simplelist_buffer);
simplelist_line_count = 0;
}
else if (lines < simplelist_line_count) {
char *end = simplelist_text[lines];
simplelist_line_pos = end - simplelist_buffer;
simplelist_line_remaining = sizeof(simplelist_buffer) - simplelist_line_pos;
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(const char *fmt, ...)
{
va_list ap;
size_t len = simplelist_line_remaining;
int line_number = simplelist_line_count++;
simplelist_text[line_number] = &simplelist_buffer[simplelist_line_pos];
va_start(ap, fmt);
len = vsnprintf(simplelist_text[line_number], simplelist_line_remaining, fmt, ap);
va_end(ap);
len++;
simplelist_line_remaining -= len;
simplelist_line_pos += len;
}
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;
list_get_name *getname;
if (info->get_name)
getname = info->get_name;
else
getname = simplelist_static_getname;
FOR_NB_SCREENS(i)
viewportmanager_theme_enable(i, !info->hide_theme, 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, info->title_icon);
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);
#ifdef HAVE_LCD_COLOR
if (info->get_color)
gui_synclist_set_color_callback(&lists, info->get_color);
if (info->selection_color)
gui_synclist_set_sel_color(&lists, info->selection_color);
#endif
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);
if (info->speak_onshow)
gui_synclist_speak_item(&lists);
while(1)
{
list_do_action(CONTEXT_LIST, info->timeout, &lists, &action);
/* 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_STD_OK)
{
info->selection = gui_synclist_get_sel_pos(&lists);
break;
}
else if ((action == ACTION_REDRAW) ||
(list_is_dirty(&lists)) ||
(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();
#ifdef HAVE_LCD_COLOR
if (info->selection_color)
gui_synclist_set_sel_color(&lists, NULL);
#endif
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->scroll_all = false;
info->hide_theme = false;
info->speak_onshow = true;
info->timeout = HZ/10;
info->selection = 0;
info->action_callback = NULL;
info->title_icon = Icon_NOICON;
info->get_icon = NULL;
info->get_name = NULL;
info->get_talk = NULL;
#ifdef HAVE_LCD_COLOR
info->get_color = NULL;
info->selection_color = NULL;
#endif
info->callback_data = data;
simplelist_line_count = 0;
}
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