static WidgetTriggerActionResult scrollbar_trigger_action ( widget *wid, MouseBindingMouseDefaultAction action, G_GNUC_UNUSED gint x, gint y, G_GNUC_UNUSED void *user_data )
{
scrollbar *sb = (scrollbar *) wid;
switch ( action )
{
case MOUSE_CLICK_DOWN:
return WIDGET_TRIGGER_ACTION_RESULT_GRAB_MOTION_BEGIN;
case MOUSE_CLICK_UP:
scrollbar_scroll ( sb, y );
return WIDGET_TRIGGER_ACTION_RESULT_GRAB_MOTION_END;
case MOUSE_DCLICK_DOWN:
case MOUSE_DCLICK_UP:
break;
}
return FALSE;
}
unsigned gui_synclist_do_touchscreen(struct gui_synclist * gui_list)
{
short x, y;
const enum screen_type screen = SCREEN_MAIN;
struct viewport *info_vp = sb_skin_get_info_vp(screen);
const int button = action_get_touchscreen_press_in_vp(&x, &y, info_vp);
const int list_start_item = gui_list->start_item[screen];
const int line_height = font_get(gui_list->parent[screen]->font)->height;
const struct viewport *list_text_vp = &list_text[screen];
const bool old_released = released;
const bool show_title = list_display_title(gui_list, screen);
const bool show_cursor = !global_settings.cursor_style &&
gui_list->show_selection_marker;
const bool on_title_clicked = show_title && y < line_height && (button&BUTTON_REL);
const bool cancelled_kinetic = (scroll_mode == SCROLL_KINETIC
&& button != ACTION_NONE && button != ACTION_UNKNOWN
&& !is_kinetic_over());
int icon_width = 0;
int line, list_width = list_text_vp->width;
released = (button&BUTTON_REL) != 0;
if (button == ACTION_NONE || button == ACTION_UNKNOWN)
{
/* this happens when we hit edges of the list while kinetic scrolling,
* but not when manually cancelling */
if (scroll_mode == SCROLL_KINETIC)
return ACTION_REDRAW;
return ACTION_NONE;
}
/* x and y are relative to info_vp */
if (gui_list->callback_get_item_icon != NULL)
icon_width += get_icon_width(screen);
if (show_cursor)
icon_width += get_icon_width(screen);
if (on_title_clicked)
{
if (scroll_mode == SCROLL_NONE || is_kinetic_over())
{
if (x < icon_width)
{
/* Top left corner is GO_TO_ROOT */
if (button == BUTTON_REL)
return ACTION_STD_MENU;
else if (button == (BUTTON_REPEAT|BUTTON_REL))
return ACTION_STD_CONTEXT;
return ACTION_NONE;
}
else /* click on title text is cancel */
if (button == BUTTON_REL)
return ACTION_STD_CANCEL;
}
/* do this after the above so the scrolling stops without
* going back in the list with the same touch */
if (scroll_mode == SCROLL_KINETIC)
{
kinetic_force_stop();
scroll_mode = SCROLL_NONE;
}
}
else /* list area clicked (or not released) */
{
const int actual_y = y - (show_title ? line_height : 0);
bool on_scrollbar_clicked;
switch (global_settings.scrollbar)
{
case SCROLLBAR_LEFT:
on_scrollbar_clicked = x <= SCROLLBAR_WIDTH; break;
case SCROLLBAR_RIGHT:
on_scrollbar_clicked = x > (icon_width + list_width); break;
default:
on_scrollbar_clicked = false; break;
}
/* conditions for scrollbar scrolling:
* * pen is on the scrollbar
* AND scrollbar is on the right (left case is handled above)
* OR * pen is in the somewhere else but we did scrollbar scrolling before
*
* scrollbar scrolling must end if the pen is released
* scrollbar scrolling must not happen if we're currently scrolling
* via swiping the screen
**/
if (!released && scroll_mode != SCROLL_SWIPE &&
(on_scrollbar_clicked || scroll_mode == SCROLL_BAR))
{
if (scroll_mode == SCROLL_KINETIC)
kinetic_force_stop();
scroll_mode = SCROLL_BAR;
return scrollbar_scroll(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 (actual_y > 0 || button & BUTTON_REPEAT)
{
/* selection needs to be corrected if an items are only
* partially visible */
line = (actual_y - y_offset) / line_height;
if (cancelled_kinetic)
{
kinetic_force_stop();
scroll_mode = SCROLL_SWIPE;
}
/* Pressed below the list*/
if (list_start_item + line >= gui_list->nb_items)
{
/* don't collect last_position outside of the list area
* it'd break selecting after such a situation */
last_position = 0;
return ACTION_NONE;
}
if (button & BUTTON_REPEAT && scroll_mode == SCROLL_NONE)
{
/* held a single line for a while, bring up the context menu */
gui_synclist_select_item(gui_list, list_start_item + line);
/* don't sent context repeatedly */
action_wait_for_release();
last_position = 0;
return ACTION_STD_CONTEXT;
}
if (released && !cancelled_kinetic)
{
/* Pen was released anywhere on the screen */
last_position = 0;
if (scroll_mode == SCROLL_NONE)
{
/* select current line */
gui_synclist_select_item(gui_list, list_start_item + line);
return ACTION_STD_OK;
}
else
{
/* we were scrolling
* -> reset scrolling but do nothing else */
if (scroll_mode == SCROLL_SWIPE)
{
if (kinetic_setup_scroll(gui_list))
scroll_mode = SCROLL_KINETIC;
}
if (scroll_mode != SCROLL_KINETIC)
scroll_mode = SCROLL_NONE;
return ACTION_NONE;
}
}
else
{ /* pen is on the screen */
bool redraw = false, result = false;
/* beginning of list interaction denoted by release in
* the previous call */
if (old_released || is_kinetic_over())
{
scroll_mode = SCROLL_NONE;
redraw = true;
}
/* select current item; gui_synclist_select_item()
* is not called because it has side effects that
* disturb kinetic scrolling */
gui_list->selected_item = list_start_item+line;
gui_synclist_speak_item(gui_list);
if (last_position == 0)
{
redraw = true;
last_position = actual_y;
}
else
{
/* record speed data in case we do kinetic scrolling */
int diff = actual_y - last_position;
kinetic_stats_collect(diff);
result = swipe_scroll(gui_list, line_height, diff);
}
/* Start scrolling once the pen is moved without
* releasing it inbetween */
if (result)
{
redraw = true;
scroll_mode = SCROLL_SWIPE;
}
last_position = actual_y;
return redraw ? ACTION_REDRAW:ACTION_NONE;
}
}
}
return ACTION_REDRAW;
}
static gboolean scrollbar_motion_notify ( widget *wid, G_GNUC_UNUSED gint x, gint y )
{
scrollbar *sb = (scrollbar *) wid;
scrollbar_scroll ( sb, y );
return TRUE;
}