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foxbox/apps/gui/bitmap/list.c
Jonathan Gordon 88ae46cc88 fix another bug from FS#10771 - list touchscreen handling needs to ignore presses outside the list viewport. 
It probably makes sense to pass off any button presses outside of the list viewport to the sbs, I'll leave that for someone else though


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24086 a1c6a512-1295-4272-9138-f99709370657
2009-12-21 04:42:20 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Jonathan Gordon
*
* 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.
*
****************************************************************************/
/* This file contains the code to draw the list widget on BITMAP LCDs. */
#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 "file.h"
#include "action.h"
#include "screen_access.h"
#include "list.h"
#include "scrollbar.h"
#include "lang.h"
#include "sound.h"
#include "misc.h"
#include "viewport.h"
#define ICON_PADDING 1
/* these are static to make scrolling work */
static struct viewport list_text[NB_SCREENS], title_text[NB_SCREENS];
int gui_list_get_item_offset(struct gui_synclist * gui_list, int item_width,
int text_pos, struct screen * display,
struct viewport *vp);
bool list_display_title(struct gui_synclist *list, enum screen_type screen);
/* Draw the list...
internal screen layout:
-----------------
|TI| title | TI is title icon
-----------------
| | | |
|S|I| | S - scrollbar
| | | items | I - icons
| | | |
------------------
Note: This image is flipped horizontally when the language is a
right-to-left one (Hebrew, Arabic)
*/
static bool draw_title(struct screen *display, struct gui_synclist *list)
{
const int screen = display->screen_type;
int style = STYLE_DEFAULT;
struct viewport *title_text_vp = &title_text[screen];
display->scroll_stop(title_text_vp);
if (!list_display_title(list, screen))
return false;
*title_text_vp = *(list->parent[screen]);
title_text_vp->height = font_get(title_text_vp->font)->height;
if (list->title_icon != Icon_NOICON && global_settings.show_icons)
{
struct viewport title_icon = *title_text_vp;
title_icon.width = get_icon_width(screen) + ICON_PADDING * 2;
if (VP_IS_RTL(&title_icon))
{
title_icon.x += title_text_vp->width - title_icon.width;
}
else
{
title_text_vp->x += title_icon.width;
}
title_text_vp->width -= title_icon.width;
display->set_viewport(&title_icon);
screen_put_icon(display, 0, 0, list->title_icon);
}
#ifdef HAVE_LCD_COLOR
if (list->title_color >= 0)
{
style |= (STYLE_COLORED|list->title_color);
}
#endif
display->set_viewport(title_text_vp);
display->puts_scroll_style(0, 0, list->title, style);
return true;
}
void list_draw(struct screen *display, struct gui_synclist *list)
{
struct viewport list_icons;
int start, end, line_height, style, i;
const int screen = display->screen_type;
const int list_start_item = list->start_item[screen];
const int icon_width = get_icon_width(screen) + ICON_PADDING;
const int scrollbar_in_left = global_settings.scrollbar == SCROLLBAR_LEFT;
const bool show_cursor = !global_settings.cursor_style &&
list->show_selection_marker;
struct viewport *parent = (list->parent[screen]);
#ifdef HAVE_LCD_COLOR
unsigned char cur_line = 0;
#endif
int item_offset;
bool show_title;
struct viewport *list_text_vp = &list_text[screen];
line_height = font_get(parent->font)->height;
display->set_viewport(parent);
display->clear_viewport();
display->scroll_stop(list_text_vp);
*list_text_vp = *parent;
if ((show_title = draw_title(display, list)))
{
list_text_vp->y += line_height;
list_text_vp->height -= line_height;
}
start = list_start_item;
end = start + viewport_get_nb_lines(list_text_vp);
/* draw the scrollbar if its needed */
if (global_settings.scrollbar &&
viewport_get_nb_lines(list_text_vp) < list->nb_items)
{
struct viewport vp;
vp = *list_text_vp;
vp.width = SCROLLBAR_WIDTH;
vp.height = line_height * viewport_get_nb_lines(list_text_vp);
vp.x = parent->x;
list_text_vp->width -= SCROLLBAR_WIDTH;
if (scrollbar_in_left)
list_text_vp->x += SCROLLBAR_WIDTH;
else
vp.x += list_text_vp->width;
display->set_viewport(&vp);
gui_scrollbar_draw(display, VP_IS_RTL(&vp) ? 1 : 0, 0, SCROLLBAR_WIDTH-1, vp.height,
list->nb_items, list_start_item, list_start_item + end-start,
VERTICAL);
}
else if (show_title)
{
/* shift everything a bit in relation to the title... */
if (!VP_IS_RTL(list_text_vp) && scrollbar_in_left)
{
list_text_vp->width -= SCROLLBAR_WIDTH;
list_text_vp->x += SCROLLBAR_WIDTH;
}
else if (VP_IS_RTL(list_text_vp) && !scrollbar_in_left)
{
list_text_vp->width -= SCROLLBAR_WIDTH;
}
}
/* setup icon placement */
list_icons = *list_text_vp;
int icon_count = (list->callback_get_item_icon != NULL) ? 1 : 0;
if (show_cursor)
icon_count++;
if (icon_count)
{
list_icons.width = icon_width * icon_count;
list_text_vp->width -= list_icons.width + ICON_PADDING;
if (VP_IS_RTL(&list_icons))
list_icons.x += list_text_vp->width + ICON_PADDING;
else
list_text_vp->x += list_icons.width + ICON_PADDING;
}
for (i=start; i<end && i<list->nb_items; i++)
{
/* do the text */
unsigned const char *s;
char entry_buffer[MAX_PATH];
unsigned char *entry_name;
int text_pos = 0;
s = list->callback_get_item_name(i, list->data, entry_buffer,
sizeof(entry_buffer));
entry_name = P2STR(s);
display->set_viewport(list_text_vp);
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(list, item_width, text_pos,
display, list_text_vp);
#ifdef HAVE_LCD_COLOR
/* if the list has a color callback */
if (list->callback_get_item_color)
{
int color = list->callback_get_item_color(i, list->data);
/* if color selected */
if (color >= 0)
{
style |= STYLE_COLORED|color;
}
}
#endif
if(i >= list->selected_item && i < list->selected_item
+ list->selected_size && list->show_selection_marker)
{/* The selected item must be displayed scrolling */
if (global_settings.cursor_style == 1
#ifdef HAVE_REMOTE_LCD
/* the global_settings.cursor_style check is here to make
* sure if they want the cursor instead of bar it will work
*/
|| (display->depth < 16 && global_settings.cursor_style)
#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(list->selected_size);
/* current line number, zero based */
style |= CURLN_PACK(cur_line);
cur_line++;
}
#endif
/* if the text is smaller than the viewport size */
if (item_offset> item_width - (list_text_vp->width - text_pos))
{
/* don't scroll */
display->puts_style_offset(0, i-start, entry_name,
style, item_offset);
}
else
{
display->puts_scroll_style_offset(0, i-start, entry_name,
style, item_offset);
}
}
else
{
if (list->scroll_all)
display->puts_scroll_style_offset(0, i-start, entry_name,
style, item_offset);
else
display->puts_style_offset(0, i-start, entry_name,
style, item_offset);
}
/* do the icon */
display->set_viewport(&list_icons);
if (list->callback_get_item_icon && global_settings.show_icons)
{
screen_put_icon_with_offset(display, show_cursor?1:0,
(i-start),show_cursor?ICON_PADDING:0,0,
list->callback_get_item_icon(i, list->data));
}
if (show_cursor && i >= list->selected_item &&
i < list->selected_item + list->selected_size)
{
screen_put_icon(display, 0, i-start, Icon_Cursor);
}
}
display->set_viewport(parent);
display->update_viewport();
display->set_viewport(NULL);
}
#if defined(HAVE_TOUCHSCREEN)
/* This needs to be fixed if we ever get more than 1 touchscreen on a target. */
static bool scrolling=false;
static int gui_synclist_touchscreen_scrollbar(struct gui_synclist * gui_list,
int y)
{
const int screen = screens[SCREEN_MAIN].screen_type;
const int nb_lines = viewport_get_nb_lines(&list_text[screen]);
if (nb_lines < gui_list->nb_items)
{
scrolling = true;
int scrollbar_size = nb_lines*
font_get(gui_list->parent[screen]->font)->height;
int actual_y = y - list_text[screen].y;
int new_selection = (actual_y * gui_list->nb_items)
/ scrollbar_size;
int start_item = new_selection - nb_lines/2;
if(start_item < 0)
start_item = 0;
else if(start_item > gui_list->nb_items - nb_lines)
start_item = gui_list->nb_items - nb_lines;
gui_list->start_item[screen] = start_item;
gui_synclist_select_item(gui_list, new_selection);
return ACTION_REDRAW;
}
return ACTION_NONE;
}
unsigned gui_synclist_do_touchscreen(struct gui_synclist * gui_list)
{
short x, y;
const int button = action_get_touchscreen_press(&x, &y);
int line;
const struct screen *display = &screens[SCREEN_MAIN];
const int screen = display->screen_type;
const int list_start_item = gui_list->start_item[screen];
const struct viewport *list_text_vp = &list_text[screen];
if (button == BUTTON_NONE)
return ACTION_NONE;
if (x > list_text_vp->x + list_text_vp->width)
{
/* wider than the list's viewport, ignore it */
return ACTION_NONE;
}
else if (x < list_text_vp->x)
{
/* Top left corner is GO_TO_ROOT */
if (y<list_text[SCREEN_MAIN].y)
{
if (button == BUTTON_REL)
return ACTION_STD_MENU;
else if (button == (BUTTON_REPEAT|BUTTON_REL))
return ACTION_STD_CONTEXT;
else
return ACTION_NONE;
}
/* Scroll bar */
else if(global_settings.scrollbar == SCROLLBAR_LEFT)
return gui_synclist_touchscreen_scrollbar(gui_list, y);
}
else
{
if (x > list_text_vp->x + list_text_vp->width &&
global_settings.scrollbar == SCROLLBAR_RIGHT)
return gui_synclist_touchscreen_scrollbar(gui_list, y);
/* |--------------------------------------------------------|
* | Description of the touchscreen list interface: |
* |--------------------------------------------------------|
* | Pressing an item will select it and "enter" it. |
* | |
* | Pressing and holding your pen down will scroll through |
* | the list of items. |
* | |
* | Pressing and holding your pen down on a single item |
* | will bring up the context menu of it. |
* |--------------------------------------------------------|
*/
if (y > list_text_vp->y || button & BUTTON_REPEAT)
{
int line_height, actual_y;
actual_y = y - list_text_vp->y;
line_height = font_get(gui_list->parent[screen]->font)->height;
line = actual_y / line_height;
/* Pressed below the list*/
if (list_start_item + line >= gui_list->nb_items)
return ACTION_NONE;
/* Pressed a border */
if(UNLIKELY(actual_y % line_height == 0))
return ACTION_NONE;
if (line != (gui_list->selected_item - list_start_item)
&& button ^ BUTTON_REL)
{
if(button & BUTTON_REPEAT)
scrolling = true;
gui_synclist_select_item(gui_list, list_start_item + line);
return ACTION_REDRAW;
}
/* This has the same effect as the icons do when the scrollbar
is on the left (ie eliminate the chances an user enters/starts
an item when he wanted to use the scrollbar, due to touchscreen
dead zones)
*/
if(global_settings.scrollbar == SCROLLBAR_RIGHT &&
x > list_text_vp->x + list_text_vp->width -
get_icon_width(SCREEN_MAIN))
return ACTION_NONE;
if (button == (BUTTON_REPEAT|BUTTON_REL))
{
if(!scrolling)
{
/* Pen was hold on the same line as the
* previously selected one
* => simulate long button press
*/
return ACTION_STD_CONTEXT;
}
else
{
/* Pen was moved across several lines and then released on
* this one
* => do nothing
*/
scrolling = false;
return ACTION_NONE;
}
}
else if(button == BUTTON_REL &&
line == gui_list->selected_item - list_start_item)
{
/* Pen was released on either the same line as the previously
* selected one or an other one
* => simulate short press
*/
return ACTION_STD_OK;
}
else
return ACTION_NONE;
}
/* Everything above the items is cancel */
else if (y < list_text_vp->y && button == BUTTON_REL)
return ACTION_STD_CANCEL;
}
return ACTION_NONE;
}
#endif
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