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foxbox/apps/gui/list.c
Nicolas Pennequin f3b015f73b FS#7808 by Tom Ross, Ken Fazzone and me, with help from Antoine Cellerier. 
Add two new line selector types: solid colour and gradient. Solid colour only uses the primary colour setting.
The secondary colour setting is used for the gradient. Text colour for the selected item is also changeable.
These new settings are a bit controversial so they may be removed later.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14868 a1c6a512-1295-4272-9138-f99709370657
2007-09-27 15:42:55 +00:00

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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"
#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_list* last_list_displayed[NB_SCREENS];
#define SHOW_LIST_TITLE ((gui_list->title != NULL) && \
(gui_list->display->nb_lines > 2))
static void gui_list_select_at_offset(struct gui_list * 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 :
*/
static void gui_list_init(struct gui_list * gui_list,
list_get_name callback_get_item_name,
void * data,
bool scroll_all,
int selected_size
)
{
gui_list->callback_get_item_icon = NULL;
gui_list->callback_get_item_name = callback_get_item_name;
gui_list->display = NULL;
gui_list_set_nb_items(gui_list, 0);
gui_list->selected_item = 0;
gui_list->start_item = 0;
gui_list->limit_scroll = false;
gui_list->data=data;
gui_list->cursor_flash_state=false;
#ifdef HAVE_LCD_BITMAP
gui_list->offset_position = 0;
#endif
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->last_displayed_selected_item = -1 ;
gui_list->last_displayed_start_item = -1 ;
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)
{
int i;
FOR_NB_SCREENS(i)
lists->gui_list[i].show_selection_marker = !hide;
}
/*
* Attach the scrolling list to a screen
* (The previous screen attachement is lost)
* - gui_list : the list structure
* - display : the screen to attach
*/
static void gui_list_set_display(struct gui_list * gui_list, struct screen * display)
{
if(gui_list->display != 0) /* we switched from a previous display */
gui_list->display->stop_scroll();
gui_list->display = display;
#ifdef HAVE_LCD_CHARCELLS
display->double_height(false);
#endif
gui_list_select_at_offset(gui_list, 0);
}
/*
* One call on 2, the selected lune will either blink the cursor or
* invert/display normal the selected line
* - gui_list : the list structure
*/
static void gui_list_flash(struct gui_list * gui_list)
{
struct screen * display=gui_list->display;
gui_list->cursor_flash_state=!gui_list->cursor_flash_state;
int selected_line=gui_list->selected_item-gui_list->start_item+SHOW_LIST_TITLE;
#ifdef HAVE_LCD_BITMAP
int line_ypos=display->getymargin()+display->char_height*selected_line;
if (global_settings.cursor_style)
{
int line_xpos=display->getxmargin();
display->set_drawmode(DRMODE_COMPLEMENT);
display->fillrect(line_xpos, line_ypos, display->width,
display->char_height);
display->set_drawmode(DRMODE_SOLID);
display->invertscroll(0, selected_line);
}
else
{
int cursor_xpos=(global_settings.scrollbar &&
display->nb_lines < gui_list->nb_items)?1:0;
screen_put_cursorxy(display, cursor_xpos, selected_line,
gui_list->cursor_flash_state);
}
display->update_rect(0, line_ypos,display->width,
display->char_height);
#else
screen_put_cursorxy(display, 0, selected_line,
gui_list->cursor_flash_state);
gui_textarea_update(display);
#endif
}
#ifdef HAVE_LCD_BITMAP
static int gui_list_get_item_offset(struct gui_list * gui_list, int item_width,
int text_pos)
{
struct screen * display=gui_list->display;
int item_offset;
if (offset_out_of_view)
{
item_offset = gui_list->offset_position;
}
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 >
item_width - (display->width - text_pos))
item_offset = item_width - (display->width - text_pos);
else
item_offset = gui_list->offset_position;
}
}
return item_offset;
}
#endif
/*
* Draws the list on the attached screen
* - gui_list : the list structure
*/
static void gui_list_draw_smart(struct gui_list *gui_list)
{
struct screen * display=gui_list->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->display->screen_type]
&& gui_list->last_displayed_start_item == gui_list->start_item
&& 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;
i = gui_list->selected_item - gui_list->start_item;
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 = gui_list->start_item;
last_list_displayed[gui_list->display->screen_type] = 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);
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++;
}
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 +
(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);
#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;
}
#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,
gui_list->start_item + lines, VERTICAL);
}
screen_set_xmargin(display, old_margin);
#endif
gui_textarea_update(display);
}
/*
* Force a full screen update.
*/
static void gui_list_draw(struct gui_list *gui_list)
{
last_list_displayed[gui_list->display->screen_type] = NULL;
return gui_list_draw_smart(gui_list);
}
/*
* Selects an item in the list
* - gui_list : the list structure
* - item_number : the number of the item which will be selected
*/
static void gui_list_select_item(struct gui_list * gui_list, int item_number)
{
if( item_number > gui_list->nb_items-1 || item_number < 0 )
return;
gui_list->selected_item = item_number;
gui_list_select_at_offset(gui_list, 0);
}
/* select an item above the current one */
static void gui_list_select_above(struct gui_list * gui_list,
int items, int nb_lines)
{
gui_list->selected_item -= items;
/* in bottom "3rd" of the screen, so dont move the start item.
by 3rd I mean above SCROLL_LIMIT lines above the end of the screen */
if (items && gui_list->start_item + SCROLL_LIMIT < gui_list->selected_item)
{
if (gui_list->show_selection_marker == false)
{
gui_list->start_item -= items;
if (gui_list->start_item < 0)
gui_list->start_item = 0;
}
return;
}
if (gui_list->selected_item < 0)
{
if(gui_list->limit_scroll)
{
gui_list->selected_item = 0;
gui_list->start_item = 0;
}
else
{
gui_list->selected_item += gui_list->nb_items;
if (global_settings.scroll_paginated)
{
gui_list->start_item = gui_list->nb_items - nb_lines;
}
}
}
if (gui_list->nb_items > nb_lines)
{
if (global_settings.scroll_paginated)
{
if (gui_list->start_item > gui_list->selected_item)
gui_list->start_item = MAX(0, gui_list->start_item - 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 = MAX(0, temp);
}
}
else gui_list->start_item = 0;
if (gui_list->selected_size > 1)
{
if (gui_list->start_item + nb_lines == gui_list->selected_item)
gui_list->start_item++;
}
}
/* select an item below the current one */
static void gui_list_select_below(struct gui_list * gui_list,
int items, int nb_lines)
{
int bottom;
gui_list->selected_item += items;
bottom = gui_list->nb_items - nb_lines;
/* always move the screen if selection isnt "visible" */
if (items && gui_list->show_selection_marker == false)
{
if (bottom < 0)
bottom = 0;
gui_list->start_item = MIN(bottom, gui_list->start_item +
items);
return;
}
/* in top "3rd" of the screen, so dont move the start item */
if (items &&
(gui_list->start_item + nb_lines - SCROLL_LIMIT > gui_list->selected_item)
&& (gui_list->selected_item < gui_list->nb_items))
{
if (gui_list->show_selection_marker == false)
{
if (bottom < 0)
bottom = 0;
gui_list->start_item = MIN(bottom,
gui_list->start_item + items);
}
return;
}
if (gui_list->selected_item >= gui_list->nb_items)
{
if(gui_list->limit_scroll)
{
gui_list->selected_item = gui_list->nb_items-gui_list->selected_size;
gui_list->start_item = MAX(0,gui_list->nb_items - nb_lines);
}
else
{
gui_list->selected_item = 0;
gui_list->start_item = 0;
}
return;
}
if (gui_list->nb_items > nb_lines)
{
if (global_settings.scroll_paginated)
{
if (gui_list->start_item + nb_lines <= gui_list->selected_item)
gui_list->start_item = 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 = MIN(bottom, temp);
}
}
else gui_list->start_item = 0;
}
static void gui_list_select_at_offset(struct gui_list * gui_list, int offset)
{
/* do this here instead of in both select_above and select_below */
int nb_lines = gui_list->display->nb_lines;
if (SHOW_LIST_TITLE)
nb_lines--;
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;
}
if (offset == 0 && global_settings.scroll_paginated &&
(gui_list->nb_items > nb_lines))
{
int bottom = gui_list->nb_items - nb_lines;
gui_list->start_item = MIN(gui_list->selected_item, bottom);
}
else if (offset < 0)
gui_list_select_above(gui_list, -offset, nb_lines);
else
gui_list_select_below(gui_list, offset, nb_lines);
}
/*
* Adds an item to the list (the callback will be asked for one more item)
* - gui_list : the list structure
*/
static void gui_list_add_item(struct gui_list * 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
*/
static void gui_list_del_item(struct gui_list * gui_list)
{
if(gui_list->nb_items > 0)
{
gui_textarea_update_nblines(gui_list->display);
int nb_lines = gui_list->display->nb_lines;
int dist_selected_from_end = gui_list->nb_items
- gui_list->selected_item - 1;
int dist_start_from_end = gui_list->nb_items
- gui_list->start_item - 1;
if(dist_selected_from_end == 0)
{
/* Oops we are removing the selected item,
select the previous one */
gui_list->selected_item--;
}
gui_list->nb_items--;
/* scroll the list if needed */
if( (dist_start_from_end < nb_lines) && (gui_list->start_item != 0) )
gui_list->start_item--;
}
}
#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_list_scroll_right(struct gui_list * gui_list)
{
/* 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 */
gui_list->offset_position+=offset_step;
if (gui_list->offset_position > 1000)
gui_list->offset_position = 1000;
}
/*
* Makes all the item in the list scroll by one step to the left.
* stops at starting position.
*/
static void gui_list_scroll_left(struct gui_list * gui_list)
{
gui_list->offset_position-=offset_step;
if (gui_list->offset_position < 0)
gui_list->offset_position = 0;
}
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.
*/
static void gui_list_set_title(struct gui_list * gui_list,
char * title, enum themable_icons icon)
{
gui_list->title = title;
gui_list->title_icon = icon;
if (title) {
#ifdef HAVE_LCD_BITMAP
gui_list->display->getstringsize(title, &gui_list->title_width, NULL);
#else
gui_list->title_width = strlen(title);
#endif
} else {
gui_list->title_width = 0;
}
}
/*
* Synchronized lists stuffs
*/
void gui_synclist_init(
struct gui_synclist * lists,
list_get_name callback_get_item_name,
void * data,
bool scroll_all,
int selected_size
)
{
int i;
FOR_NB_SCREENS(i)
{
gui_list_init(&(lists->gui_list[i]),
callback_get_item_name,
data, scroll_all, selected_size);
gui_list_set_display(&(lists->gui_list[i]), &(screens[i]));
}
}
void gui_synclist_set_nb_items(struct gui_synclist * lists, int nb_items)
{
int i;
FOR_NB_SCREENS(i)
{
gui_list_set_nb_items(&(lists->gui_list[i]), nb_items);
#ifdef HAVE_LCD_BITMAP
lists->gui_list[i].offset_position = 0;
#endif
}
}
int gui_synclist_get_nb_items(struct gui_synclist * lists)
{
return gui_list_get_nb_items(&((lists)->gui_list[0]));
}
int gui_synclist_get_sel_pos(struct gui_synclist * lists)
{
return gui_list_get_sel_pos(&((lists)->gui_list[0]));
}
void gui_synclist_set_icon_callback(struct gui_synclist * lists,
list_get_icon icon_callback)
{
int i;
FOR_NB_SCREENS(i)
{
gui_list_set_icon_callback(&(lists->gui_list[i]), icon_callback);
}
}
void gui_synclist_draw(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_draw(&(lists->gui_list[i]));
}
void gui_synclist_select_item(struct gui_synclist * lists, int item_number)
{
int i;
FOR_NB_SCREENS(i)
gui_list_select_item(&(lists->gui_list[i]), item_number);
}
static void gui_synclist_select_next_page(struct gui_synclist * lists,
enum screen_type screen)
{
int i;
FOR_NB_SCREENS(i)
gui_list_select_at_offset(&(lists->gui_list[i]),
screens[screen].nb_lines);
}
static void gui_synclist_select_previous_page(struct gui_synclist * lists,
enum screen_type screen)
{
int i;
FOR_NB_SCREENS(i)
gui_list_select_at_offset(&(lists->gui_list[i]),
-screens[screen].nb_lines);
}
void gui_synclist_add_item(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_add_item(&(lists->gui_list[i]));
}
void gui_synclist_del_item(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_del_item(&(lists->gui_list[i]));
}
void gui_synclist_limit_scroll(struct gui_synclist * lists, bool scroll)
{
int i;
FOR_NB_SCREENS(i)
gui_list_limit_scroll(&(lists->gui_list[i]), scroll);
}
void gui_synclist_set_title(struct gui_synclist * lists,
char * title, enum themable_icons icon)
{
int i;
FOR_NB_SCREENS(i)
gui_list_set_title(&(lists->gui_list[i]), title, icon);
}
void gui_synclist_flash(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_flash(&(lists->gui_list[i]));
}
#ifdef HAVE_LCD_BITMAP
static void gui_synclist_scroll_right(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_scroll_right(&(lists->gui_list[i]));
}
static void gui_synclist_scroll_left(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_scroll_left(&(lists->gui_list[i]));
}
#endif /* HAVE_LCD_BITMAP */
extern intptr_t get_action_data(void);
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
int i;
#ifdef HAVE_SCROLLWHEEL
int next_item_modifier = button_apply_acceleration(get_action_data(),
WHEEL_ACCELERATION_FACTOR);
#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
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)
{
#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:
FOR_NB_SCREENS(i)
gui_list_select_at_offset(&(lists->gui_list[i]), -next_item_modifier);
#ifndef HAVE_SCROLLWHEEL
if (queue_count(&button_queue) < FRAMEDROP_TRIGGER)
#endif
{
gui_synclist_draw(lists);
}
yield();
*actionptr = ACTION_STD_PREV;
return true;
case ACTION_STD_NEXT:
case ACTION_STD_NEXTREPEAT:
FOR_NB_SCREENS(i)
gui_list_select_at_offset(&(lists->gui_list[i]), next_item_modifier);
#ifndef HAVE_SCROLLWHEEL
if (queue_count(&button_queue) < 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->gui_list[0].offset_position == 0)
{
scrolling_left = false;
*actionptr = ACTION_STD_CANCEL;
return true;
}
*actionptr = ACTION_TREE_PGLEFT;
case ACTION_TREE_PGLEFT:
if(!scrolling_left && (lists->gui_list[0].offset_position == 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;
}
return false;
}
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