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rockbox/apps/gui/list.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Kevin Ferrare
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "lcd.h"
#include "font.h"
#include "button.h"
#include "sprintf.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 "statusbar.h"
#include "textarea.h"
#include "lang.h"
#include "sound.h"
#include "misc.h"
#include "talk.h"
#ifdef HAVE_LCD_CHARCELLS
#define SCROLL_LIMIT 1
#else
#define SCROLL_LIMIT (nb_lines<3?1:2)
#endif
/* 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 struct gui_synclist* last_list_displayed;
#define SHOW_LIST_TITLE ((gui_list->title != NULL) && \
(display->nb_lines > 2))
static void gui_list_select_at_offset(struct gui_synclist * gui_list,
int offset);
/*
* 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 :
*/
void gui_synclist_init(struct gui_synclist * gui_list,
list_get_name callback_get_item_name,
void * data,
bool scroll_all,
int selected_size
)
{
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_set_nb_items(gui_list, 0);
gui_list->selected_item = 0;
FOR_NB_SCREENS(i)
{
gui_list->start_item[i] = 0;
gui_list->last_displayed_start_item[i] = -1 ;
#ifdef HAVE_LCD_BITMAP
gui_list->offset_position[i] = 0;
#endif
}
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_width = 0;
gui_list->title_icon = Icon_NOICON;
gui_list->scheduled_talk_tick = gui_list->last_talked_tick = 0;
gui_list->show_selection_marker = true;
gui_list->last_displayed_selected_item = -1 ;
#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
static int gui_list_get_item_offset(struct gui_synclist * gui_list, int item_width,
int text_pos, struct screen * display)
{
int item_offset;
if (offset_out_of_view)
{
item_offset = gui_list->offset_position[display->screen_type];
}
else
{
/* if text is smaller then view */
if (item_width <= display->width - text_pos)
{
item_offset = 0;
}
else
{
/* if text got out of view */
if (gui_list->offset_position[display->screen_type] >
item_width - (display->width - text_pos))
item_offset = item_width - (display->width - text_pos);
else
item_offset = gui_list->offset_position[display->screen_type];
}
}
return item_offset;
}
#endif
/*
* Draws the list on the attached screen
* - gui_list : the list structure
*/
static void gui_list_draw_smart(struct gui_synclist *gui_list, struct screen * display)
{
int text_pos;
bool draw_icons = (gui_list->callback_get_item_icon != NULL && global_settings.show_icons);
bool draw_cursor;
int i;
int lines;
static int last_lines[NB_SCREENS] = {0};
#ifdef HAVE_LCD_BITMAP
int item_offset;
int old_margin = display->getxmargin();
#endif
int start, end;
bool partial_draw = false;
#ifdef HAVE_LCD_BITMAP
display->setfont(FONT_UI);
gui_textarea_update_nblines(display);
#endif
/* Speed up UI by drawing the changed contents only. */
if (gui_list == last_list_displayed
&& gui_list->last_displayed_start_item[display->screen_type] == gui_list->start_item[display->screen_type]
&& gui_list->selected_size == 1)
{
partial_draw = true;
}
lines = display->nb_lines - SHOW_LIST_TITLE;
if (last_lines[display->screen_type] != lines)
{
gui_list_select_at_offset(gui_list, 0);
last_lines[display->screen_type] = lines;
}
if (partial_draw)
{
end = gui_list->last_displayed_selected_item - gui_list->start_item[display->screen_type];
i = gui_list->selected_item - gui_list->start_item[display->screen_type];
if (i < end )
{
start = i;
end++;
}
else
{
start = end;
end = i + 1;
}
}
else
{
gui_textarea_clear(display);
start = 0;
end = display->nb_lines;
gui_list->last_displayed_start_item[display->screen_type] = gui_list->start_item[display->screen_type];
last_list_displayed = gui_list;
}
gui_list->last_displayed_selected_item = gui_list->selected_item;
/* position and draw the list title & icon */
if (SHOW_LIST_TITLE && !partial_draw)
{
if (gui_list->title_icon != NOICON && draw_icons)
{
screen_put_icon(display, 0, 0, gui_list->title_icon);
#ifdef HAVE_LCD_BITMAP
text_pos = get_icon_width(display->screen_type)+2; /* pixels */
#else
text_pos = 1; /* chars */
#endif
}
else
{
text_pos = 0;
}
#ifdef HAVE_LCD_BITMAP
int title_style = STYLE_DEFAULT;
#ifdef HAVE_LCD_COLOR
if (gui_list->title_color >= 0)
{
title_style |= STYLE_COLORED;
title_style |= gui_list->title_color;
}
#endif
screen_set_xmargin(display, text_pos); /* margin for title */
item_offset = gui_list_get_item_offset(gui_list, gui_list->title_width,
text_pos, display);
if (item_offset > gui_list->title_width - (display->width - text_pos))
display->puts_style_offset(0, 0, gui_list->title,
title_style, item_offset);
else
display->puts_scroll_style_offset(0, 0, gui_list->title,
title_style, item_offset);
#else
display->puts_scroll(text_pos, 0, gui_list->title);
#endif
}
/* Adjust the position of icon, cursor, text for the list */
#ifdef HAVE_LCD_BITMAP
gui_textarea_update_nblines(display);
bool draw_scrollbar;
draw_scrollbar = (global_settings.scrollbar &&
lines < gui_list->nb_items);
draw_cursor = !global_settings.cursor_style &&
gui_list->show_selection_marker;
text_pos = 0; /* here it's in pixels */
if(draw_scrollbar || SHOW_LIST_TITLE) /* indent if there's
a title */
{
text_pos += SCROLLBAR_WIDTH;
}
if(draw_cursor)
text_pos += get_icon_width(display->screen_type) + 2;
if(draw_icons)
text_pos += get_icon_width(display->screen_type) + 2;
#else
draw_cursor = true;
if(draw_icons)
text_pos = 2; /* here it's in chars */
else
text_pos = 1;
#endif
#ifdef HAVE_LCD_BITMAP
screen_set_xmargin(display, text_pos); /* margin for list */
#endif
if (SHOW_LIST_TITLE)
{
start++;
if (end < display->nb_lines)
end++;
}
#ifdef HAVE_LCD_COLOR
unsigned char cur_line = 0;
#endif
for (i = start; i < end; i++)
{
unsigned char *s;
char entry_buffer[MAX_PATH];
unsigned char *entry_name;
int current_item = gui_list->start_item[display->screen_type] +
(SHOW_LIST_TITLE ? i-1 : i);
/* When there are less items to display than the
* current available space on the screen, we stop*/
if(current_item >= gui_list->nb_items)
break;
s = gui_list->callback_get_item_name(current_item,
gui_list->data,
entry_buffer);
entry_name = P2STR(s);
#ifdef HAVE_LCD_BITMAP
int style = STYLE_DEFAULT;
/* position the string at the correct offset place */
int item_width,h;
display->getstringsize(entry_name, &item_width, &h);
item_offset = gui_list_get_item_offset(gui_list, item_width,
text_pos, display);
#endif
#ifdef HAVE_LCD_COLOR
/* if the list has a color callback */
if (gui_list->callback_get_item_color)
{
int color = gui_list->callback_get_item_color(current_item,
gui_list->data);
/* if color selected */
if (color >= 0)
{
style |= STYLE_COLORED;
style |= color;
}
}
#endif
if(gui_list->show_selection_marker &&
current_item >= gui_list->selected_item &&
current_item < gui_list->selected_item + gui_list->selected_size)
{/* The selected item must be displayed scrolling */
#ifdef HAVE_LCD_BITMAP
if (global_settings.cursor_style == 1
#ifdef HAVE_REMOTE_LCD
|| display->screen_type == SCREEN_REMOTE
#endif
)
{
/* Display inverted-line-style */
style |= STYLE_INVERT;
}
#ifdef HAVE_LCD_COLOR
else if (global_settings.cursor_style == 2)
{
/* Display colour line selector */
style |= STYLE_COLORBAR;
}
else if (global_settings.cursor_style == 3)
{
/* Display gradient line selector */
style = STYLE_GRADIENT;
/* Make the lcd driver know how many lines the gradient should
cover and current line number */
/* number of selected lines */
style |= NUMLN_PACK(gui_list->selected_size);
/* current line number, zero based */
style |= CURLN_PACK(cur_line);
cur_line++;
}
#endif
else /* if (!global_settings.cursor_style) */
{
if (current_item % gui_list->selected_size != 0)
draw_cursor = false;
}
/* if the text is smaller than the viewport size */
if (item_offset > item_width - (display->width - text_pos))
{
/* don't scroll */
display->puts_style_offset(0, i, entry_name,
style, item_offset);
}
else
{
display->puts_scroll_style_offset(0, i, entry_name,
style, item_offset);
}
#else
display->puts_scroll(text_pos, i, entry_name);
#endif
if (draw_cursor)
{
screen_put_icon_with_offset(display, 0, i,
(draw_scrollbar || SHOW_LIST_TITLE)?
SCROLLBAR_WIDTH: 0,
0, Icon_Cursor);
}
}
else
{/* normal item */
if(gui_list->scroll_all)
{
#ifdef HAVE_LCD_BITMAP
display->puts_scroll_style_offset(0, i, entry_name,
style, item_offset);
#else
display->puts_scroll(text_pos, i, entry_name);
#endif
}
else
{
#ifdef HAVE_LCD_BITMAP
display->puts_style_offset(0, i, entry_name,
style, item_offset);
#else
display->puts(text_pos, i, entry_name);
#endif
}
}
/* Icons display */
if(draw_icons)
{
enum themable_icons icon;
icon = gui_list->callback_get_item_icon(current_item, gui_list->data);
if(icon > Icon_NOICON)
{
#ifdef HAVE_LCD_BITMAP
int x = draw_cursor?1:0;
int x_off = (draw_scrollbar || SHOW_LIST_TITLE) ? SCROLLBAR_WIDTH: 0;
screen_put_icon_with_offset(display, x, i,
x_off, 0, icon);
#else
screen_put_icon(display, 1, i, icon);
#endif
}
}
}
#ifdef HAVE_LCD_BITMAP
/* Draw the scrollbar if needed*/
if(draw_scrollbar)
{
int y_start = gui_textarea_get_ystart(display);
if (SHOW_LIST_TITLE)
y_start += display->char_height;
int scrollbar_y_end = display->char_height *
lines + y_start;
gui_scrollbar_draw(display, 0, y_start, SCROLLBAR_WIDTH-1,
scrollbar_y_end - y_start, gui_list->nb_items,
gui_list->start_item[display->screen_type],
gui_list->start_item[display->screen_type] + lines, VERTICAL);
}
screen_set_xmargin(display, old_margin);
#endif
gui_textarea_update(display);
}
/*
* Force a full screen update.
*/
void gui_synclist_draw(struct gui_synclist *gui_list)
{
int i;
FOR_NB_SCREENS(i)
{
last_list_displayed = NULL;
gui_list_draw_smart(gui_list, &screens[i]);
}
}
/* 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)
{
struct screen *display = &screens[screen];
int nb_lines = display->nb_lines - SHOW_LIST_TITLE;
int difference = gui_list->selected_item - gui_list->start_item[screen];
/* edge case,, selected last item */
if (gui_list->selected_item == gui_list->nb_items -1)
{
gui_list->start_item[screen] = MAX(0, gui_list->nb_items - nb_lines);
}
/* selected first item */
else if (gui_list->selected_item == 0)
{
gui_list->start_item[screen] = 0;
}
else if (difference < SCROLL_LIMIT) /* list moved up */
{
if (global_settings.scroll_paginated)
{
if (gui_list->start_item[screen] > gui_list->selected_item)
gui_list->start_item[screen] = (gui_list->selected_item/nb_lines)*nb_lines;
}
else
{
int top_of_screen = gui_list->selected_item - SCROLL_LIMIT;
int temp = MIN(top_of_screen, gui_list->nb_items - nb_lines);
gui_list->start_item[screen] = MAX(0, temp);
}
}
else if (difference > nb_lines - SCROLL_LIMIT) /* list moved down */
{
int bottom = gui_list->nb_items - nb_lines;
/* always move the screen if selection isnt "visible" */
if (gui_list->show_selection_marker == false)
{
if (bottom < 0)
bottom = 0;
gui_list->start_item[screen] = MIN(bottom, gui_list->start_item[screen] +
2*gui_list->selected_size);
}
else if (global_settings.scroll_paginated)
{
if (gui_list->start_item[screen] + nb_lines <= gui_list->selected_item)
gui_list->start_item[screen] = MIN(bottom, gui_list->selected_item);
}
else
{
int top_of_screen = gui_list->selected_item + SCROLL_LIMIT - nb_lines;
int temp = MAX(0, top_of_screen);
gui_list->start_item[screen] = MIN(bottom, temp);
}
}
}
/*
* 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-1 || item_number < 0 )
return;
gui_list->selected_item = item_number;
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;
/* always select the first item of multi-line lists */
offset -= offset%gui_list->selected_size;
}
new_selection = gui_list->selected_item + offset;
if (new_selection >= gui_list->nb_items)
{
gui_list->selected_item = gui_list->limit_scroll ?
gui_list->nb_items - gui_list->selected_size : 0;
}
else if (new_selection < 0)
{
gui_list->selected_item = gui_list->limit_scroll ?
0 : gui_list->nb_items - gui_list->selected_size;
}
else if (gui_list->show_selection_marker == false)
{
/* NOTE: this part doesnt work as well as it used to, the problem is
we want to scroll the lists seperatly but we only have one
selected item now, I dont think this is such a big deal though */
int i, nb_lines, screen_top;
FOR_NB_SCREENS(i)
{
struct screen *display = &screens[i];
nb_lines = display->nb_lines - SHOW_LIST_TITLE;
if (offset > 0)
{
screen_top = gui_list->nb_items-nb_lines;
if (screen_top < 0)
screen_top = 0;
gui_list->start_item[i] = MIN(screen_top, gui_list->start_item[i] +
gui_list->selected_size);
}
else
{
gui_list->start_item[i] = MAX(0, gui_list->start_item[i] -
gui_list->selected_size);
}
}
return;
}
else gui_list->selected_item += offset;
gui_synclist_select_item(gui_list, gui_list->selected_item);
}
/*
* 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)
{
int i;
if(gui_list->nb_items > 0)
{
if (gui_list->selected_item == gui_list->nb_items-1)
gui_list->selected_item--;
FOR_NB_SCREENS(i)
{
gui_textarea_update_nblines(&screens[i]);
int nb_lines = screens[i].nb_lines;
int dist_start_from_end = gui_list->nb_items
- gui_list->start_item[i] - 1;
/* scroll the list if needed */
if( (dist_start_from_end < nb_lines) && (gui_list->start_item[i] != 0) )
gui_list->start_item[i]--;
}
gui_list->nb_items--;
}
}
#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)
{
if (enable)
offset_out_of_view = true;
else
offset_out_of_view = false;
}
#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;
if (title) {
#ifdef HAVE_LCD_BITMAP
int i;
FOR_NB_SCREENS(i)
screens[i].getstringsize(title, &gui_list->title_width, NULL);
#else
gui_list->title_width = strlen(title);
#endif
} else {
gui_list->title_width = 0;
}
}
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;
}
static void gui_synclist_select_next_page(struct gui_synclist * lists,
enum screen_type screen)
{
gui_list_select_at_offset(lists, screens[screen].nb_lines);
}
static void gui_synclist_select_previous_page(struct gui_synclist * lists,
enum screen_type screen)
{
gui_list_select_at_offset(lists, -screens[screen].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 */
static void _gui_synclist_speak_item(struct gui_synclist *lists, bool repeating)
{
list_speak_item *cb = lists->callback_speak_item;
if(cb && gui_synclist_get_nb_items(lists) != 0)
{
int sel = gui_synclist_get_sel_pos(lists);
talk_shutup();
/* If we got a repeating key action, or 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(repeating
|| (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/4)))
{
lists->scheduled_talk_tick = current_tick +HZ/4;
return;
} else {
lists->scheduled_talk_tick = 0; /* work done */
cb(sel, lists->data);
lists->last_talked_tick = current_tick;
}
}
}
void gui_synclist_speak_item(struct gui_synclist * lists)
/* The list user should call this to speak the first item on entering
the list, and whenever the list is updated. */
{
if(gui_synclist_get_nb_items(lists) == 0 && global_settings.talk_menu)
talk_id(VOICE_EMPTY_LIST, true);
else _gui_synclist_speak_item(lists, false);
}
extern intptr_t get_action_data(void);
#if defined(HAVE_TOUCHPAD)
/* this needs to be fixed if we ever get more than 1 touchscreen on a target */
unsigned gui_synclist_do_touchpad(struct gui_synclist * gui_list)
{
short x,y;
unsigned button = action_get_touchpad_press(&x, &y);
int line;
struct screen *display = &screens[SCREEN_MAIN];
if (button == BUTTON_NONE)
return ACTION_NONE;
if (x<SCROLLBAR_WIDTH)
{
/* top left corner is hopefully GO_TO_ROOT */
if (y<STATUSBAR_HEIGHT)
{
if (button == BUTTON_REL)
return ACTION_STD_MENU;
else if (button == BUTTON_REPEAT)
return ACTION_STD_CONTEXT;
else
return ACTION_NONE;
}
/* scroll bar */
else
{
int new_selection, nb_lines;
int height, size;
nb_lines = display->nb_lines - SHOW_LIST_TITLE;
if (nb_lines < gui_list->nb_items)
{
height = nb_lines * display->char_height;
size = height*nb_lines / gui_list->nb_items;
new_selection = (y*(gui_list->nb_items-nb_lines))/(height-size);
gui_synclist_select_item(gui_list, new_selection);
nb_lines /= 2;
if (new_selection - gui_list->start_item[SCREEN_MAIN] > nb_lines)
{
new_selection = gui_list->start_item[SCREEN_MAIN]+nb_lines;
}
gui_list->start_item[SCREEN_MAIN] = new_selection;
return ACTION_REDRAW;
}
}
}
else
{
if (button != BUTTON_REL && button != BUTTON_REPEAT)
{
if (global_settings.statusbar)
y -= STATUSBAR_HEIGHT;
if (SHOW_LIST_TITLE)
y -= display->char_height;
line = y / display->char_height;
if (line != gui_list->selected_item - gui_list->start_item[SCREEN_MAIN])
gui_synclist_select_item(gui_list, gui_list->start_item[SCREEN_MAIN]+line);
return ACTION_REDRAW;
}
/* title or statusbar is cancel */
if (global_settings.statusbar)
{
if (y < STATUSBAR_HEIGHT && !SHOW_LIST_TITLE )
return ACTION_STD_CANCEL;
y -= STATUSBAR_HEIGHT;
}
/* title goes up one level */
if (SHOW_LIST_TITLE)
{
if (y < display->char_height)
return ACTION_STD_CANCEL;
y -= display->char_height;
}
/* pressing an item will select it.
pressing the selected item will "enter" it */
line = y / display->char_height;
if (line != gui_list->selected_item - gui_list->start_item[SCREEN_MAIN])
{
if (gui_list->start_item[SCREEN_MAIN]+line > gui_list->nb_items)
return ACTION_NONE;
gui_synclist_select_item(gui_list, gui_list->start_item[SCREEN_MAIN]+line);
}
if (button == BUTTON_REPEAT)
return ACTION_STD_CONTEXT;
else
return ACTION_STD_OK;
}
return ACTION_NONE;
}
#endif
bool gui_synclist_do_button(struct gui_synclist * lists,
unsigned *actionptr, enum list_wrap wrap)
{
int action = *actionptr;
#ifdef HAVE_LCD_BITMAP
static bool scrolling_left = false;
#endif
#ifdef HAVE_SCROLLWHEEL
int next_item_modifier = button_apply_acceleration(get_action_data());
#else
static int next_item_modifier = 1;
static int last_accel_tick = 0;
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 (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_TOUCHPAD)
if (action == ACTION_TOUCHPAD)
action = *actionptr = gui_synclist_do_touchpad(lists);
#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_SCROLLWHEEL
if (queue_count(&button_queue) < FRAMEDROP_TRIGGER)
#endif
gui_synclist_draw(lists);
_gui_synclist_speak_item(lists,
action == ACTION_STD_PREVREPEAT
|| next_item_modifier >1);
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_SCROLLWHEEL
if (queue_count(&button_queue) < FRAMEDROP_TRIGGER)
#endif
gui_synclist_draw(lists);
_gui_synclist_speak_item(lists,
action == ACTION_STD_NEXTREPEAT
|| next_item_modifier >1);
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);
_gui_synclist_speak_item(lists, false);
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);
_gui_synclist_speak_item(lists, false);
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, false);
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);
}
/* 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)
lines = 0;
else if (lines > SIMPLELIST_MAX_LINES)
lines = SIMPLELIST_MAX_LINES;
simplelist_line_count = 0;
}
/* 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 char* simplelist_static_getname(int item, void * data, char *buffer)
{
(void)data; (void)buffer;
return simplelist_text[item];
}
bool simplelist_show_list(struct simplelist_info *info)
{
struct gui_synclist lists;
int action, old_line_count = simplelist_line_count;
char* (*getname)(int item, void * data, char *buffer);
if (info->get_name)
getname = info->get_name;
else
getname = simplelist_static_getname;
gui_synclist_init(&lists, getname, info->callback_data,
info->scroll_all, info->selection_size);
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);
gui_synclist_hide_selection_marker(&lists, info->hide_selection);
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->start_selection);
gui_synclist_draw(&lists);
gui_synclist_speak_item(&lists);
while(1)
{
gui_syncstatusbar_draw(&statusbars, true);
list_do_action(CONTEXT_STD, info->timeout,
&lists, &action, LIST_WRAP_UNLESS_HELD);
/* We must yield in this case or no other thread can run */
if (info->timeout == TIMEOUT_NOBLOCK)
yield();
if (info->action_callback)
{
action = info->action_callback(action, &lists);
if (info->get_name == NULL)
gui_synclist_set_nb_items(&lists, simplelist_line_count*info->selection_size);
}
if (action == ACTION_STD_CANCEL)
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);
if (action != ACTION_NONE)
gui_synclist_speak_item(&lists);
old_line_count = simplelist_line_count;
}
else if(default_event_handler(action) == SYS_USB_CONNECTED)
return true;
}
talk_shutup();
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->start_selection = 0;
info->action_callback = NULL;
info->get_icon = NULL;
info->get_name = NULL;
info->get_talk = NULL;
info->callback_data = data;
}
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