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st/scroll-bar: Fix horizontal bar in RTL locales

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As the view now scrolls from right-to-left in RTL locales, the
scroll bar handle should reflect that.

Likewise the event handling needs adjusting as well: Scrolling
left should increase the adjustment value, and clicking the
trough to the left of the handle as well.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1318
This commit is contained in:
Florian Müllner 2020-06-16 23:07:08 +02:00
parent 8d7f7e61dd
commit 0db41a3773
1 changed files with 40 additions and 7 deletions
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47
src/st/st-scroll-bar.c
View File

@ -262,14 +262,25 @@ scroll_bar_allocate_children (StScrollBar *bar,
}
else
{
ClutterTextDirection direction;
avail_size = content_box.x2 - content_box.x1;
handle_size = increment * avail_size;
handle_size = CLAMP (handle_size, min_size, max_size);
handle_box.x1 = content_box.x1 + position * (avail_size - handle_size);
handle_box.y1 = content_box.y1;
direction = clutter_actor_get_text_direction (CLUTTER_ACTOR (bar));
if (direction == CLUTTER_TEXT_DIRECTION_RTL)
{
handle_box.x2 = content_box.x2 - position * (avail_size - handle_size);
handle_box.x1 = handle_box.x2 - handle_size;
}
else
{
handle_box.x1 = content_box.x1 + position * (avail_size - handle_size);
handle_box.x2 = handle_box.x1 + handle_size;
}
handle_box.x2 = handle_box.x1 + handle_size;
handle_box.y1 = content_box.y1;
handle_box.y2 = content_box.y2;
}
@ -464,28 +475,40 @@ st_scroll_bar_scroll_event (ClutterActor *actor,
ClutterScrollEvent *event)
{
StScrollBarPrivate *priv = ST_SCROLL_BAR_PRIVATE (actor);
ClutterTextDirection direction;
ClutterScrollDirection scroll_dir;
if (clutter_event_is_pointer_emulated ((ClutterEvent *) event))
return TRUE;
switch (event->direction)
direction = clutter_actor_get_text_direction (actor);
scroll_dir = event->direction;
switch (scroll_dir)
{
case CLUTTER_SCROLL_SMOOTH:
{
gdouble delta_x, delta_y;
clutter_event_get_scroll_delta ((ClutterEvent *)event, &delta_x, &delta_y);
if (direction == CLUTTER_TEXT_DIRECTION_RTL)
delta_x *= -1;
if (priv->vertical)
st_adjustment_adjust_for_scroll_event (priv->adjustment, delta_y);
else
st_adjustment_adjust_for_scroll_event (priv->adjustment, delta_x);
}
break;
case CLUTTER_SCROLL_UP:
case CLUTTER_SCROLL_DOWN:
case CLUTTER_SCROLL_LEFT:
case CLUTTER_SCROLL_RIGHT:
adjust_with_direction (priv->adjustment, event->direction);
if (direction == CLUTTER_TEXT_DIRECTION_RTL)
scroll_dir = scroll_dir == CLUTTER_SCROLL_LEFT ? CLUTTER_SCROLL_RIGHT
: CLUTTER_SCROLL_LEFT;
/* Fall through */
case CLUTTER_SCROLL_UP:
case CLUTTER_SCROLL_DOWN:
adjust_with_direction (priv->adjustment, scroll_dir);
break;
default:
g_return_val_if_reached (FALSE);
@ -552,6 +575,7 @@ move_slider (StScrollBar *bar,
gfloat y)
{
StScrollBarPrivate *priv = st_scroll_bar_get_instance_private (bar);
ClutterTextDirection direction;
gdouble position, lower, upper, page_size;
gfloat ux, uy, pos, size;
@ -585,6 +609,10 @@ move_slider (StScrollBar *bar,
NULL,
&page_size);
direction = clutter_actor_get_text_direction (CLUTTER_ACTOR (bar));
if (direction == CLUTTER_TEXT_DIRECTION_RTL)
pos = size - pos;
position = ((pos / size)
* (upper - lower - page_size))
+ lower;
@ -668,6 +696,7 @@ static gboolean
trough_paging_cb (StScrollBar *self)
{
StScrollBarPrivate *priv = st_scroll_bar_get_instance_private (self);
ClutterTextDirection direction;
g_autoptr (ClutterTransition) transition = NULL;
StSettings *settings;
gfloat handle_pos, event_pos, tx, ty;
@ -725,6 +754,10 @@ trough_paging_cb (StScrollBar *self)
priv->move_y,
&tx, &ty);
direction = clutter_actor_get_text_direction (CLUTTER_ACTOR (self));
if (direction == CLUTTER_TEXT_DIRECTION_RTL)
page_increment *= -1;
if (priv->vertical)
event_pos = ty;
else