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touchscreen: Fix kinetic and swipe scrolling outside of the list viewport.

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There were some bugs, especially when the user scrolled above the
list viewport. One bug made Rockbox completely unusable once triggered.

Change-Id: I9bb4722ff4381db189058e9a19ea30b2c69e87d9
This commit is contained in:
Thomas Martitz 2013-01-17 23:26:37 +01:00
parent 9b7edbf609
commit 2ffde90c69
1 changed files with 61 additions and 59 deletions
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120
apps/gui/bitmap/list.c
View file

@ -732,7 +732,8 @@ unsigned gui_synclist_do_touchscreen(struct gui_synclist * list)
short x, y;
int action, adj_x, adj_y, line, line_height, list_start_item;
bool recurse;
static int last_y = -1;
static bool initial_touch = true;
static int last_y;
screen = SCREEN_MAIN;
parent = list->parent[screen];
@ -752,67 +753,68 @@ unsigned gui_synclist_do_touchscreen(struct gui_synclist * list)
{
case SCROLL_NONE:
{
if (last_y == -1)
{ /* first run. register adj_y and re-run (will then take the else case) */
last_y = adj_y;
recurse = true;
}
else
int click_loc;
if (initial_touch)
{
/* on the first touch last_y has to be reset to avoid
* glitches with touches from long ago */
last_y = adj_y;
initial_touch = false;
}
line = 0; /* silence gcc 'used uninitialized' warning */
click_loc = get_click_location(list, x, y);
if (click_loc & LIST)
{
if(!skinlist_get_item(&screens[screen], list, adj_x, adj_y, &line))
{
/* selection needs to be corrected if items are only partially visible */
line = (adj_y - y_offset) / line_height;
if (list_display_title(list, screen))
line -= 1; /* adjust for the list title */
}
if (line >= list->nb_items)
return ACTION_NONE;
list->selected_item = list_start_item+line;
gui_synclist_speak_item(list);
}
if (action == BUTTON_TOUCHSCREEN)
{
/* if not scrolling, the user is trying to select */
int diff = adj_y - last_y;
if ((click_loc & LIST) && swipe_scroll(list, diff))
scroll_mode = SCROLL_SWIPE;
else if (click_loc & SCROLLBAR)
scroll_mode = SCROLL_BAR;
}
else if (action == BUTTON_REPEAT)
{
int click_loc = get_click_location(list, x, y);
line = 0; /* silence gcc 'used uninitialized' warning */
if (click_loc & LIST)
{
if(!skinlist_get_item(&screens[screen], list, adj_x, adj_y, &line))
{
/* selection needs to be corrected if items are only partially visible */
line = (adj_y - y_offset) / line_height;
if (list_display_title(list, screen))
line -= 1; /* adjust for the list title */
}
if (line >= list->nb_items)
return ACTION_NONE;
list->selected_item = list_start_item+line;
gui_synclist_speak_item(list);
/* held a single line for a while, bring up the context menu */
gui_synclist_select_item(list, list_start_item + line);
/* don't sent context repeatedly */
action_wait_for_release();
initial_touch = true;
return ACTION_STD_CONTEXT;
}
if (action == BUTTON_TOUCHSCREEN)
{
/* if not scrolling, the user is trying to select */
int diff = adj_y - last_y;
if ((click_loc & LIST) && swipe_scroll(list, diff))
scroll_mode = SCROLL_SWIPE;
else if (click_loc & SCROLLBAR)
scroll_mode = SCROLL_BAR;
}
else if (action & BUTTON_REL)
{
initial_touch = true;
if (click_loc & LIST)
{ /* release on list item enters it */
gui_synclist_select_item(list, list_start_item + line);
return ACTION_STD_OK;
}
else if (action == BUTTON_REPEAT)
{
if (click_loc & LIST)
{
/* held a single line for a while, bring up the context menu */
gui_synclist_select_item(list, list_start_item + line);
/* don't sent context repeatedly */
action_wait_for_release();
last_y = -1;
return ACTION_STD_CONTEXT;
}
else if (click_loc & TITLE_TEXT)
{ /* clicking the title goes one level up (cancel) */
return ACTION_STD_CANCEL;
}
else if (action & BUTTON_REL)
{
last_y = -1;
if (click_loc & LIST)
{ /* release on list item enters it */
gui_synclist_select_item(list, list_start_item + line);
return ACTION_STD_OK;
}
else if (click_loc & TITLE_TEXT)
{ /* clicking the title goes one level up (cancel) */
return ACTION_STD_CANCEL;
}
else if (click_loc & TITLE_ICON)
{ /* clicking the title icon goes back to the root */
return ACTION_STD_MENU;
}
else if (click_loc & TITLE_ICON)
{ /* clicking the title icon goes back to the root */
return ACTION_STD_MENU;
}
}
break;
@ -842,7 +844,7 @@ unsigned gui_synclist_do_touchscreen(struct gui_synclist * list)
scroll_mode = SCROLL_NONE;
if (scroll_mode == SCROLL_NONE)
last_y = -1;
initial_touch = true;
break;
}
case SCROLL_KINETIC:
@ -879,8 +881,8 @@ unsigned gui_synclist_do_touchscreen(struct gui_synclist * list)
}
}
/* register y position unless forcefully reset to 1- */
if (last_y >= 0)
/* register y position unless forcefully reset */
if (!initial_touch)
last_y = adj_y;
return recurse ? gui_synclist_do_touchscreen(list) : ACTION_REDRAW;