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Incremental fixes for scrollview work

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- Fix existing typos and spacing problems
- Get preferred height, not current height, of shadows
- Let shadows overflow don't clamp them when we have too little space
- Remove a now-unecessary stray MAX()
- Fix up scrollview visibility for the pathological case of no child
- Disconnect from adjustments on remove()
- Don't unset the adjustments on the child on remove(), since they
  already existed or were autocreated on add()

  (We should what we are doing and set the adjustments of the
  scrollbars on the child rather than setting the adjustments of
  the child, so we match GTK+'s scrolllable interface, but this
  at least makes it consistent instead of a weird mix.)

https://bugzilla.gnome.org/show_bug.cgi?id=611740
This commit is contained in:
Owen W. Taylor 2010-03-10 11:56:04 -05:00
parent ffd25fe9e4
commit f6cbb14393
2 changed files with 43 additions and 29 deletions
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4
src/st/st-box-layout.c
View File

@ -811,12 +811,12 @@ st_box_layout_allocate (ClutterActor *actor,
if (priv->is_vertical)
{
expand_amount = MAX (0, avail_height - natural_height);
shrink_amount = MAX (0, natural_height - MAX (avail_height, min_height));
shrink_amount = MAX (0, natural_height - avail_height);
}
else
{
expand_amount = MAX (0, avail_width - natural_width);
shrink_amount = MAX (0, natural_width - MAX (avail_width, min_width));
shrink_amount = MAX (0, natural_width - avail_width);
}
if (expand_amount > 0)

68
src/st/st-scroll-view.c
View File

@ -496,7 +496,7 @@ st_scroll_view_get_preferred_height (ClutterActor *actor,
break;
case GTK_POLICY_ALWAYS:
case GTK_POLICY_AUTOMATIC:
/* Should theoretically use the min height of the hscrollbar,
/* Should theoretically use the min height of the vscrollbar,
* but that's not cleanly defined at the moment */
min_height = 0;
break;
@ -519,6 +519,18 @@ st_scroll_view_get_preferred_height (ClutterActor *actor,
st_theme_node_adjust_preferred_height (theme_node, min_height_p, natural_height_p);
}
static gfloat
get_shadow_height (ClutterActor *shadow)
{
gfloat natural_height;
/* The shadows are empty StBin and have no height-for-width behavior */
clutter_actor_get_preferred_height (shadow, -1, NULL, &natural_height);
return natural_height;
}
static void
st_scroll_view_allocate (ClutterActor *actor,
const ClutterActorBox *box,
@ -553,11 +565,11 @@ st_scroll_view_allocate (ClutterActor *actor,
sb_width = get_scrollbar_width (ST_SCROLL_VIEW (actor));
sb_height = get_scrollbar_height (ST_SCROLL_VIEW (actor));
/* Determine what scrollbars are visible. The basic idea of the handling
* of an automatic scrollbars is that we start off with the assumption
* that that we don't need any scrollbars, see if that works, and if
* not add horizontal and vertical scrollbars until we are no longer
* overflowing.
/* Determine what scrollbars are visible. The basic idea of the
* handling of an automatic scrollbars is that we start off with the
* assumption that we don't need any scrollbars, see if that works,
* and if not add horizontal and vertical scrollbars until we are no
* longer overflowing.
*/
if (priv->child)
{
@ -572,8 +584,7 @@ st_scroll_view_allocate (ClutterActor *actor,
if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
{
/* Pass one, try without a vertical scrollbar */
clutter_actor_get_preferred_height (priv->child, MAX (avail_width, child_min_width),
&child_min_height, NULL);
clutter_actor_get_preferred_height (priv->child, avail_width, &child_min_height, NULL);
vscrollbar_visible = child_min_height > avail_height;
hscrollbar_visible = child_min_width > avail_width - (vscrollbar_visible ? sb_width : 0);
vscrollbar_visible = child_min_height > avail_height - (hscrollbar_visible ? sb_height : 0);
@ -581,7 +592,7 @@ st_scroll_view_allocate (ClutterActor *actor,
/* Pass two - if we needed a vertical scrollbar, get a new preferred height */
if (vscrollbar_visible)
{
clutter_actor_get_preferred_height (priv->child, MAX (avail_width - sb_width, child_min_width),
clutter_actor_get_preferred_height (priv->child, MAX (avail_width - sb_width, 0),
&child_min_height, NULL);
hscrollbar_visible = child_min_width > avail_width - sb_width;
}
@ -591,8 +602,7 @@ st_scroll_view_allocate (ClutterActor *actor,
hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
/* try without a vertical scrollbar */
clutter_actor_get_preferred_height (priv->child, MAX (avail_width, child_min_width),
&child_min_height, NULL);
clutter_actor_get_preferred_height (priv->child, avail_width, &child_min_height, NULL);
vscrollbar_visible = child_min_height > avail_height - (hscrollbar_visible ? sb_height : 0);
}
}
@ -608,8 +618,8 @@ st_scroll_view_allocate (ClutterActor *actor,
}
else
{
hscrollbar_visible = FALSE;
vscrollbar_visible = FALSE;
hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
}
/* Whether or not we show the scrollbars, if the scrollbars are visible
@ -656,22 +666,22 @@ st_scroll_view_allocate (ClutterActor *actor,
if (priv->child)
clutter_actor_allocate (priv->child, &child_box, flags);
/*Shadows*/
/* Shadows */
if (priv->top_shadow && CLUTTER_ACTOR_IS_VISIBLE (priv->top_shadow))
{
child_box.x1 = content_box.x1;
child_box.y1 = content_box.y1;
child_box.x2 = MAX (child_box.x1, content_box.x2 - sb_width);
child_box.y2 = content_box.y1 + clutter_actor_get_height (priv->top_shadow);
child_box.y2 = content_box.y1 + get_shadow_height (priv->top_shadow);
clutter_actor_allocate (priv->top_shadow, &child_box, flags);
}
if (priv->bottom_shadow && CLUTTER_ACTOR_IS_VISIBLE (priv->bottom_shadow))
{
child_box.x1 = content_box.x1;
child_box.y1 = MAX (content_box.y1, content_box.y2 - sb_height - clutter_actor_get_height (priv->bottom_shadow));
child_box.y1 = content_box.y2 - sb_height - get_shadow_height (priv->bottom_shadow);
child_box.x2 = MAX (content_box.x1, content_box.x2 - sb_width);
child_box.y2 = MAX (content_box.y1, content_box.y2 - sb_height);
child_box.y2 = content_box.y2 - sb_height;
clutter_actor_allocate (priv->bottom_shadow, &child_box, flags);
}
@ -708,8 +718,8 @@ st_scroll_view_scroll_event (ClutterActor *self,
if (!priv->mouse_scroll)
return FALSE;
hadjustment = st_scroll_bar_get_adjustment (ST_SCROLL_BAR(priv->hscroll));
vadjustment = st_scroll_bar_get_adjustment (ST_SCROLL_BAR(priv->vscroll));
hadjustment = st_scroll_bar_get_adjustment (ST_SCROLL_BAR (priv->hscroll));
vadjustment = st_scroll_bar_get_adjustment (ST_SCROLL_BAR (priv->vscroll));
switch (event->direction)
{
@ -896,11 +906,11 @@ child_hadjustment_notify_cb (GObject *gobject,
disconnect_hadjustment (scroll);
st_scrollable_get_adjustments (ST_SCROLLABLE (actor), &priv->hadjustment, NULL);
st_scroll_bar_set_adjustment (ST_SCROLL_BAR(priv->hscroll), priv->hadjustment);
st_scroll_bar_set_adjustment (ST_SCROLL_BAR (priv->hscroll), priv->hadjustment);
if (priv->hadjustment)
{
/* Force scroll step if neede. */
/* Force scroll step if needed. */
if (priv->column_size_set)
{
g_object_set (priv->hadjustment,
@ -920,12 +930,12 @@ child_vadjustment_notify_cb (GObject *gobject,
disconnect_vadjustment (scroll);
st_scrollable_get_adjustments (ST_SCROLLABLE(priv->child), NULL, &priv->vadjustment);
st_scroll_bar_set_adjustment (ST_SCROLL_BAR(priv->vscroll), priv->vadjustment);
st_scrollable_get_adjustments (ST_SCROLLABLE (priv->child), NULL, &priv->vadjustment);
st_scroll_bar_set_adjustment (ST_SCROLL_BAR (priv->vscroll), priv->vadjustment);
if (priv->vadjustment)
{
/* Force scroll step if neede. */
/* Force scroll step if needed. */
if (priv->row_size_set)
{
g_object_set (priv->vadjustment,
@ -937,8 +947,9 @@ child_vadjustment_notify_cb (GObject *gobject,
G_CALLBACK (child_adjustment_changed_cb), scroll);
g_signal_connect (priv->vadjustment, "notify::value",
G_CALLBACK (child_adjustment_notify_value), scroll);
update_shadow_visibility (scroll);
}
update_shadow_visibility (scroll);
}
static void
@ -997,7 +1008,8 @@ static void
st_scroll_view_remove (ClutterContainer *container,
ClutterActor *actor)
{
StScrollViewPrivate *priv = ST_SCROLL_VIEW (container)->priv;
StScrollView *self = ST_SCROLL_VIEW (container);
StScrollViewPrivate *priv = self->priv;
if (actor == priv->child)
{
@ -1006,13 +1018,15 @@ st_scroll_view_remove (ClutterContainer *container,
/* chain up to StBin::remove() */
st_scroll_view_parent_iface->remove (container, actor);
disconnect_hadjustment (self);
disconnect_vadjustment (self);
g_signal_handlers_disconnect_by_func (priv->child,
child_hadjustment_notify_cb,
container);
g_signal_handlers_disconnect_by_func (priv->child,
child_vadjustment_notify_cb,
container);
st_scrollable_set_adjustments ((StScrollable*) priv->child, NULL, NULL);
g_object_unref (priv->child);
priv->child = NULL;