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rockbox/apps/gui/list.c
Daniel Stenberg b05eec8b1e Big Code Police raid. Pretty pretty please, we do no macrofy simple 
assignments and things just to make them appear as function calls. That makes
code harder to follow. Did some gcc4 warning fixes as well.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8163 a1c6a512-1295-4272-9138-f99709370657
2005-12-05 23:37:14 +00:00

542 lines
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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 "settings.h"
#include "kernel.h"
#include "screen_access.h"
#include "list.h"
#include "scrollbar.h"
#include "statusbar.h"
#include "textarea.h"
#ifdef HAVE_LCD_CHARCELLS
#define SCROLL_LIMIT 1
#else
#define SCROLL_LIMIT 2
#endif
void gui_list_init(struct gui_list * gui_list,
list_get_name callback_get_item_name,
void * data
)
{
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;
}
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_put_selection_in_screen(gui_list, false);
}
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;
#ifdef HAVE_LCD_BITMAP
int line_ypos=display->getymargin()+display->char_height*selected_line;
if (global_settings.invert_cursor)
{
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
}
void gui_list_put_selection_in_screen(struct gui_list * gui_list,
bool put_from_end)
{
gui_textarea_update_nblines(gui_list->display);
int nb_lines=gui_list->display->nb_lines;
if(put_from_end)
{
int list_end = gui_list->selected_item + SCROLL_LIMIT - 1;
if(list_end > gui_list->nb_items)
list_end = nb_lines;
gui_list->start_item = list_end - nb_lines;
}
else
{
int list_start = gui_list->selected_item - SCROLL_LIMIT + 1;
if(list_start + nb_lines > gui_list->nb_items)
list_start = gui_list->nb_items - nb_lines;
gui_list->start_item = list_start;
}
if(gui_list->start_item < 0)
gui_list->start_item = 0;
}
void gui_list_draw(struct gui_list * gui_list)
{
struct screen * display=gui_list->display;
int cursor_pos = 0;
int icon_pos = 1;
int text_pos;
bool draw_icons = (gui_list->callback_get_item_icon != NULL ) ;
bool draw_cursor;
int i;
/* Adjust the position of icon, cursor, text */
#ifdef HAVE_LCD_BITMAP
display->setfont(FONT_UI);
gui_textarea_update_nblines(display);
bool draw_scrollbar = (global_settings.scrollbar &&
display->nb_lines < gui_list->nb_items);
draw_cursor = !global_settings.invert_cursor;
text_pos = 0; /* here it's in pixels */
if(draw_scrollbar)
{
cursor_pos++;
icon_pos++;
text_pos += SCROLLBAR_WIDTH;
}
if(!draw_cursor)
icon_pos--;
else
text_pos += CURSOR_WIDTH;
if(draw_icons)
text_pos += 8;
#else
draw_cursor = true;
if(draw_icons)
text_pos = 2; /* here it's in chars */
else
text_pos = 1;
#endif
gui_textarea_clear(display);
#ifdef HAVE_LCD_BITMAP
screen_set_xmargin(display, text_pos);
#endif
for(i = 0;i < display->nb_lines;i++)
{
char entry_buffer[MAX_PATH];
unsigned char *entry_name;
int current_item = gui_list->start_item + 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;
entry_name = gui_list->callback_get_item_name(current_item,
gui_list->data,
entry_buffer);
if(current_item == gui_list->selected_item)
{
/* The selected item must be displayed scrolling */
#ifdef HAVE_LCD_BITMAP
if (global_settings.invert_cursor)/* Display inverted-line-style*/
display->puts_scroll_style(0, i, entry_name, STYLE_INVERT);
else
display->puts_scroll(0, i, entry_name);
#else
display->puts_scroll(text_pos, i, entry_name);
#endif
if(draw_cursor)
screen_put_cursorxy(display, cursor_pos, i, true);
}
else
{/* normal item */
#ifdef HAVE_LCD_BITMAP
display->puts(0, i, entry_name);
#else
display->puts(text_pos, i, entry_name);
#endif
}
/* Icons display */
if(draw_icons)
{
ICON icon;
gui_list->callback_get_item_icon(current_item,
gui_list->data,
&icon);
if(icon)
screen_put_iconxy(display, icon_pos, i, icon);
}
}
#ifdef HAVE_LCD_BITMAP
/* Draw the scrollbar if needed*/
if(draw_scrollbar)
{
int y_start = gui_textarea_get_ystart(display);
int scrollbar_y_end = display->char_height *
display->nb_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 + display->nb_lines, VERTICAL);
}
#endif
gui_textarea_update(display);
}
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_put_selection_in_screen(gui_list, false);
}
void gui_list_select_next(struct gui_list * gui_list)
{
int item_pos;
int end_item;
if( gui_list->selected_item == gui_list->nb_items-1 )
{
if(gui_list->limit_scroll)
return;
gui_list->selected_item++;
/* we have already reached the bottom of the list */
gui_list->selected_item = 0;
gui_list->start_item = 0;
}
else
{
int nb_lines = gui_list->display->nb_lines;
gui_list->selected_item++;
item_pos = gui_list->selected_item - gui_list->start_item;
end_item = gui_list->start_item + nb_lines;
/* we start scrolling vertically when reaching the line
* (nb_lines-SCROLL_LIMIT)
* and when we are not in the last part of the list*/
if( item_pos > nb_lines-SCROLL_LIMIT && end_item < gui_list->nb_items )
gui_list->start_item++;
}
}
void gui_list_select_previous(struct gui_list * gui_list)
{
if( gui_list->selected_item == 0 )
{
int nb_lines = gui_list->display->nb_lines;
if(gui_list->limit_scroll)
return;
gui_list->selected_item--;
/* we have aleady reached the top of the list */
int start;
gui_list->selected_item = gui_list->nb_items-1;
start = gui_list->nb_items-nb_lines;
if( start < 0 )
gui_list->start_item = 0;
else
gui_list->start_item = start;
}
else
{
int item_pos;
gui_list->selected_item--;
item_pos = gui_list->selected_item - gui_list->start_item;
if( item_pos < SCROLL_LIMIT-1 && gui_list->start_item > 0 )
gui_list->start_item--;
}
}
void gui_list_select_next_page(struct gui_list * gui_list, int nb_lines)
{
if(gui_list->selected_item == gui_list->nb_items-1)
{
if(gui_list->limit_scroll)
return;
gui_list->selected_item = 0;
}
else
{
gui_list->selected_item += nb_lines;
if(gui_list->selected_item > gui_list->nb_items-1)
gui_list->selected_item = gui_list->nb_items-1;
}
gui_list_put_selection_in_screen(gui_list, true);
}
void gui_list_select_previous_page(struct gui_list * gui_list, int nb_lines)
{
if(gui_list->selected_item == 0)
{
if(gui_list->limit_scroll)
return;
gui_list->selected_item = gui_list->nb_items - 1;
}
else
{
gui_list->selected_item -= nb_lines;
if(gui_list->selected_item < 0)
gui_list->selected_item = 0;
}
gui_list_put_selection_in_screen(gui_list, false);
}
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;
}
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--;
}
}
/*
* Synchronized lists stuffs
*/
void gui_synclist_init(
struct gui_synclist * lists,
list_get_name callback_get_item_name,
void * data
)
{
int i;
FOR_NB_SCREENS(i)
{
gui_list_init(&(lists->gui_list[i]),
callback_get_item_name,
data);
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);
}
}
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);
}
void gui_synclist_select_next(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_select_next(&(lists->gui_list[i]));
}
void gui_synclist_select_previous(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_select_previous(&(lists->gui_list[i]));
}
void gui_synclist_select_next_page(struct gui_synclist * lists,
enum screen_type screen)
{
int i;
FOR_NB_SCREENS(i)
gui_list_select_next_page(&(lists->gui_list[i]),
screens[screen].nb_lines);
}
void gui_synclist_select_previous_page(struct gui_synclist * lists,
enum screen_type screen)
{
int i;
FOR_NB_SCREENS(i)
gui_list_select_previous_page(&(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_flash(struct gui_synclist * lists)
{
int i;
FOR_NB_SCREENS(i)
gui_list_flash(&(lists->gui_list[i]));
}
unsigned gui_synclist_do_button(struct gui_synclist * lists, unsigned button)
{
gui_synclist_limit_scroll(lists, true);
switch(button)
{
case LIST_PREV:
#ifdef LIST_RC_PREV
case LIST_RC_PREV:
#endif
gui_synclist_limit_scroll(lists, false);
case LIST_PREV | BUTTON_REPEAT:
#ifdef LIST_RC_PREV
case LIST_RC_PREV | BUTTON_REPEAT:
#endif
gui_synclist_select_previous(lists);
gui_synclist_draw(lists);
return LIST_PREV;
case LIST_NEXT:
#ifdef LIST_RC_NEXT
case LIST_RC_NEXT:
#endif
gui_synclist_limit_scroll(lists, false);
case LIST_NEXT | BUTTON_REPEAT:
#ifdef LIST_RC_NEXT
case LIST_RC_NEXT | BUTTON_REPEAT:
#endif
gui_synclist_select_next(lists);
gui_synclist_draw(lists);
return LIST_NEXT;
/* 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*/
#ifdef LIST_PGUP
case LIST_PGUP:
gui_synclist_limit_scroll(lists, false);
case LIST_PGUP | BUTTON_REPEAT:
gui_synclist_select_previous_page(lists, SCREEN_MAIN);
gui_synclist_draw(lists);
return LIST_NEXT;
#endif
#ifdef LIST_RC_PGUP
case LIST_RC_PGUP:
gui_synclist_limit_scroll(lists, false);
case LIST_RC_PGUP | BUTTON_REPEAT:
gui_synclist_select_previous_page(lists, SCREEN_REMOTE);
gui_synclist_draw(lists);
return LIST_NEXT;
#endif
#ifdef LIST_PGDN
case LIST_PGDN:
gui_synclist_limit_scroll(lists, false);
case LIST_PGDN | BUTTON_REPEAT:
gui_synclist_select_next_page(lists, SCREEN_MAIN);
gui_synclist_draw(lists);
return LIST_PREV;
#endif
#ifdef LIST_RC_PGDN
case LIST_RC_PGDN:
gui_synclist_limit_scroll(lists, false);
case LIST_RC_PGDN | BUTTON_REPEAT:
gui_synclist_select_next_page(lists, SCREEN_REMOTE);
gui_synclist_draw(lists);
return LIST_PREV;
#endif
}
return 0;
}
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