/**
* _st_actor_get_preferred_height:
* @actor: a #ClutterActor
* @for_width: as with clutter_actor_get_preferred_height()
* @x_fill: %TRUE if @actor will fill its allocation horizontally
* @min_height_p: as with clutter_actor_get_preferred_height()
* @natural_height_p: as with clutter_actor_get_preferred_height()
*
* Like clutter_actor_get_preferred_height(), but if @x_fill is
* %FALSE, then it will compute a height request based on the
* assumption that @actor will be given an allocation no wider than
* its natural width.
*/
void
_st_actor_get_preferred_height (ClutterActor *actor,
gfloat for_width,
gboolean x_fill,
gfloat *min_height_p,
gfloat *natural_height_p)
{
if (!x_fill && for_width != -1)
{
ClutterRequestMode mode;
gfloat natural_width;
mode = clutter_actor_get_request_mode (actor);
if (mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
clutter_actor_get_preferred_width (actor, -1, NULL, &natural_width);
if (for_width > natural_width)
for_width = natural_width;
}
}
clutter_actor_get_preferred_height (actor, for_width, min_height_p, natural_height_p);
}
/**
* _st_actor_get_preferred_width:
* @actor: a #ClutterActor
* @for_height: as with clutter_actor_get_preferred_width()
* @y_fill: %TRUE if @actor will fill its allocation vertically
* @min_width_p: as with clutter_actor_get_preferred_width()
* @natural_width_p: as with clutter_actor_get_preferred_width()
*
* Like clutter_actor_get_preferred_width(), but if @y_fill is %FALSE,
* then it will compute a width request based on the assumption that
* @actor will be given an allocation no taller than its natural
* height.
*/
void
_st_actor_get_preferred_width (ClutterActor *actor,
gfloat for_height,
gboolean y_fill,
gfloat *min_width_p,
gfloat *natural_width_p)
{
if (!y_fill && for_height != -1)
{
ClutterRequestMode mode;
gfloat natural_height;
mode = clutter_actor_get_request_mode (actor);
if (mode == CLUTTER_REQUEST_WIDTH_FOR_HEIGHT)
{
clutter_actor_get_preferred_height (actor, -1, NULL, &natural_height);
if (for_height > natural_height)
for_height = natural_height;
}
}
clutter_actor_get_preferred_width (actor, for_height, min_width_p, natural_width_p);
}
static void
st_scroll_view_allocate (ClutterActor *actor,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
ClutterActorBox content_box, child_box;
ClutterActorClass *parent_parent_class;
gfloat avail_width, avail_height, sb_width, sb_height;
gboolean hscrollbar_visible, vscrollbar_visible;
StScrollViewPrivate *priv = ST_SCROLL_VIEW (actor)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor));
/* Chain up to the parent's parent class
*
* We do this because we do not want StBin to allocate the child, as we
* give it a different allocation later, depending on whether the scrollbars
* are visible
*/
parent_parent_class
= g_type_class_peek_parent (st_scroll_view_parent_class);
CLUTTER_ACTOR_CLASS (parent_parent_class)->
allocate (actor, box, flags);
st_theme_node_get_content_box (theme_node, box, &content_box);
avail_width = content_box.x2 - content_box.x1;
avail_height = content_box.y2 - content_box.y1;
if (clutter_actor_get_request_mode (actor) == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
sb_width = get_scrollbar_width (ST_SCROLL_VIEW (actor), -1);
sb_height = get_scrollbar_height (ST_SCROLL_VIEW (actor), sb_width);
}
else
{
sb_height = get_scrollbar_height (ST_SCROLL_VIEW (actor), -1);
sb_width = get_scrollbar_width (ST_SCROLL_VIEW (actor), sb_height);
}
/* 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)
{
gfloat child_min_width;
gfloat child_min_height;
clutter_actor_get_preferred_width (priv->child, -1,
&child_min_width, NULL);
if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
{
if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
{
/* Pass one, try without a vertical scrollbar */
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);
/* 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, 0),
&child_min_height, NULL);
hscrollbar_visible = child_min_width > avail_width - sb_width;
}
}
else
{
hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
/* try without a vertical scrollbar */
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);
}
}
else
{
vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
hscrollbar_visible = child_min_width > avail_height - (vscrollbar_visible ? 0 : sb_width);
else
hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
}
}
else
{
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
* actors, we need to give them some allocation, so we unconditionally
* give them the "right" allocation; that might overlap the child when
* the scrollbars are not visible, but it doesn't matter because we
* don't include them in pick or paint.
*/
/* Vertical scrollbar */
if (CLUTTER_ACTOR_IS_VISIBLE (priv->vscroll))
{
if (st_widget_get_direction (ST_WIDGET (actor)) == ST_TEXT_DIRECTION_RTL)
{
child_box.x1 = content_box.x1;
child_box.x2 = content_box.x1 + sb_width;
}
else
{
child_box.x1 = content_box.x2 - sb_width;
child_box.x2 = content_box.x2;
}
child_box.y1 = content_box.y1;
child_box.y2 = content_box.y2 - (hscrollbar_visible ? sb_height : 0);
clutter_actor_allocate (priv->vscroll, &child_box, flags);
}
/* Horizontal scrollbar */
if (CLUTTER_ACTOR_IS_VISIBLE (priv->hscroll))
{
if (st_widget_get_direction (ST_WIDGET (actor)) == ST_TEXT_DIRECTION_RTL)
{
child_box.x1 = content_box.x1 + (vscrollbar_visible ? sb_width : 0);
child_box.x2 = content_box.x2;
}
else
{
child_box.x1 = content_box.x1;
child_box.x2 = content_box.x2 - (vscrollbar_visible ? sb_width : 0);
}
child_box.y1 = content_box.y2 - sb_height;
child_box.y2 = content_box.y2;
clutter_actor_allocate (priv->hscroll, &child_box, flags);
}
/* Now fold visibility into the scrollbar sizes to simplify the rest
* of the computations.
*/
if (!hscrollbar_visible)
sb_height = 0;
if (!vscrollbar_visible)
sb_width = 0;
/* Child */
if (st_widget_get_direction (ST_WIDGET (actor)) == ST_TEXT_DIRECTION_RTL)
{
child_box.x1 = content_box.x1 + sb_width;
child_box.x2 = content_box.x2;
}
else
{
child_box.x1 = content_box.x1;
child_box.x2 = content_box.x2 - sb_width;
}
child_box.y1 = content_box.y1;
child_box.y2 = content_box.y2 - sb_height;
if (priv->child)
clutter_actor_allocate (priv->child, &child_box, flags);
if (priv->hscrollbar_visible != hscrollbar_visible)
{
g_object_freeze_notify (G_OBJECT (actor));
priv->hscrollbar_visible = hscrollbar_visible;
g_object_notify (G_OBJECT (actor), "hscrollbar-visible");
g_object_thaw_notify (G_OBJECT (actor));
}
if (priv->vscrollbar_visible != vscrollbar_visible)
{
g_object_freeze_notify (G_OBJECT (actor));
priv->vscrollbar_visible = vscrollbar_visible;
g_object_notify (G_OBJECT (actor), "vscrollbar-visible");
g_object_thaw_notify (G_OBJECT (actor));
}
}
static void
mx_stack_allocate (ClutterActor *actor,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
GList *c;
ClutterActorBox avail_space;
MxStackPrivate *priv = MX_STACK (actor)->priv;
CLUTTER_ACTOR_CLASS (mx_stack_parent_class)->allocate (actor, box, flags);
mx_widget_get_available_area (MX_WIDGET (actor), box, &avail_space);
memcpy (&priv->allocation, box, sizeof (priv->allocation));
for (c = priv->children; c; c = c->next)
{
gboolean x_fill, y_fill, fit, crop;
MxAlign x_align, y_align;
ClutterActor *child = c->data;
ClutterActorBox child_box = avail_space;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
clutter_container_child_get (CLUTTER_CONTAINER (actor),
child,
"x-fill", &x_fill,
"y-fill", &y_fill,
"x-align", &x_align,
"y-align", &y_align,
"fit", &fit,
"crop", &crop,
NULL);
/* when "crop" is set, fit and fill properties are ignored */
if (crop)
{
gfloat available_height, available_width;
gfloat natural_width, natural_height;
gfloat ratio_width, ratio_height, ratio_child;
available_width = avail_space.x2 - avail_space.x1;
available_height = avail_space.y2 - avail_space.y1;
clutter_actor_get_preferred_size (child,
NULL, NULL,
&natural_width,
&natural_height);
ratio_child = natural_width / natural_height;
ratio_width = available_width / natural_width;
ratio_height = available_height / natural_height;
if (ratio_width > ratio_height)
{
natural_width = available_width;
natural_height = natural_width / ratio_child;
}
else
{
natural_height = available_height;
natural_width = ratio_child * natural_height;
}
child_box.x1 = (available_width - natural_width) / 2;
child_box.y1 = (available_height - natural_height) / 2;
child_box.x2 = natural_width;
child_box.y2 = natural_height;
clutter_actor_allocate (child, &child_box, flags);
continue;
}
/* when "fit" is set, fill properties are ignored */
if (fit)
{
gfloat available_height, available_width, width, height;
gfloat min_width, natural_width, min_height, natural_height;
ClutterRequestMode request_mode;
available_height = avail_space.y2 - avail_space.y1;
available_width = avail_space.x2 - avail_space.x1;
request_mode = clutter_actor_get_request_mode (child);
if (request_mode == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
clutter_actor_get_preferred_width (child, available_height,
&min_width,
&natural_width);
width = CLAMP (natural_width, min_width, available_width);
clutter_actor_get_preferred_height (child, width,
&min_height,
&natural_height);
height = CLAMP (natural_height, min_height, available_height);
}
else
{
clutter_actor_get_preferred_height (child, available_width,
&min_height,
&natural_height);
height = CLAMP (natural_height, min_height, available_height);
clutter_actor_get_preferred_width (child, height,
&min_width,
&natural_width);
width = CLAMP (natural_width, min_width, available_width);
}
child_box.x1 = 0;
child_box.y1 = 0;
switch (x_align)
{
case MX_ALIGN_START:
break;
case MX_ALIGN_MIDDLE:
child_box.x1 += (gint)(available_width / 2 - width / 2);
break;
case MX_ALIGN_END:
child_box.x1 = avail_space.x2 - width;
break;
}
switch (y_align)
{
case MX_ALIGN_START:
break;
case MX_ALIGN_MIDDLE:
child_box.y1 += (gint)(available_height / 2 - height / 2);
break;
case MX_ALIGN_END:
child_box.y1 = avail_space.y2 - height;
break;
}
child_box.x2 = child_box.x1 + width;
child_box.y2 = child_box.y1 + height;
clutter_actor_allocate (child, &child_box, flags);
continue;
}
/* Adjust the available space when not filling, otherwise
* actors that support width-for-height or height-for-width
* allocation won't shrink correctly.
*/
if (!x_fill)
{
gfloat width;
clutter_actor_get_preferred_width (child, -1, NULL, &width);
switch (x_align)
{
case MX_ALIGN_START:
break;
case MX_ALIGN_MIDDLE:
child_box.x1 += (gint)((avail_space.x2 - avail_space.x1) / 2 -
width / 2);
break;
case MX_ALIGN_END:
child_box.x1 = avail_space.x2 - width;
break;
}
child_box.x2 = child_box.x1 + width;
if (child_box.x2 > avail_space.x2)
child_box.x2 = avail_space.x2;
if (child_box.x1 < avail_space.x1)
child_box.x1 = avail_space.x1;
}
if (!y_fill)
{
gfloat height;
clutter_actor_get_preferred_height (child, -1, NULL, &height);
switch (y_align)
{
case MX_ALIGN_START:
break;
case MX_ALIGN_MIDDLE:
child_box.y1 += (gint)((avail_space.y2 - avail_space.y1) / 2 -
height / 2);
break;
case MX_ALIGN_END:
child_box.y1 = avail_space.y2 - height;
break;
}
child_box.y2 = child_box.y1 + height;
if (child_box.y2 > avail_space.y2)
child_box.y2 = avail_space.y2;
if (child_box.y1 < avail_space.y1)
child_box.y1 = avail_space.y1;
}
mx_allocate_align_fill (child,
&child_box,
x_align,
y_align,
x_fill,
y_fill);
clutter_actor_allocate (child, &child_box, flags);
}
}
/**
* _st_allocate_fill:
* @parent: the parent #StWidget
* @child: the child (not necessarily an #StWidget)
* @childbox: total space that could be allocated to @child
* @x_alignment: horizontal alignment within @childbox
* @y_alignment: vertical alignment within @childbox
* @x_fill: whether or not to fill @childbox horizontally
* @y_fill: whether or not to fill @childbox vertically
*
* Given @childbox, containing the initial allocation of @child, this
* adjusts the horizontal allocation if @x_fill is %FALSE, and the
* vertical allocation if @y_fill is %FALSE, by:
*
* - reducing the allocation if it is larger than @child's natural
* size.
*
* - adjusting the position of the child within the allocation
* according to @x_alignment/@y_alignment (and flipping
* @x_alignment if @parent has %ST_TEXT_DIRECTION_RTL)
*
* If @x_fill and @y_fill are both %TRUE, or if @child's natural size
* is larger than the initial allocation in @childbox, then @childbox
* will be unchanged.
*
* If you are allocating children with _st_allocate_fill(), you should
* determine their preferred sizes using
* _st_actor_get_preferred_width() and
* _st_actor_get_preferred_height(), not with the corresponding
* Clutter methods.
*/
void
_st_allocate_fill (StWidget *parent,
ClutterActor *child,
ClutterActorBox *childbox,
StAlign x_alignment,
StAlign y_alignment,
gboolean x_fill,
gboolean y_fill)
{
gfloat natural_width, natural_height;
gfloat min_width, min_height;
gfloat child_width, child_height;
gfloat available_width, available_height;
ClutterRequestMode request;
gdouble x_align, y_align;
available_width = childbox->x2 - childbox->x1;
available_height = childbox->y2 - childbox->y1;
if (available_width < 0)
{
available_width = 0;
childbox->x2 = childbox->x1;
}
if (available_height < 0)
{
available_height = 0;
childbox->y2 = childbox->y1;
}
/* If we are filling both horizontally and vertically then we don't
* need to do anything else.
*/
if (x_fill && y_fill)
return;
_st_get_align_factors (parent, x_alignment, y_alignment,
&x_align, &y_align);
/* The following is based on clutter_actor_get_preferred_size(), but
* modified to cope with the fact that the available size may be
* less than the preferred size.
*/
request = clutter_actor_get_request_mode (child);
if (request == CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
clutter_actor_get_preferred_width (child, -1,
&min_width,
&natural_width);
child_width = CLAMP (natural_width, min_width, available_width);
clutter_actor_get_preferred_height (child, child_width,
&min_height,
&natural_height);
child_height = CLAMP (natural_height, min_height, available_height);
}
else
{
clutter_actor_get_preferred_height (child, -1,
&min_height,
&natural_height);
child_height = CLAMP (natural_height, min_height, available_height);
clutter_actor_get_preferred_width (child, child_height,
&min_width,
&natural_width);
child_width = CLAMP (natural_width, min_width, available_width);
}
if (!x_fill)
{
childbox->x1 += (int)((available_width - child_width) * x_align);
childbox->x2 = childbox->x1 + (int) child_width;
}
if (!y_fill)
{
childbox->y1 += (int)((available_height - child_height) * y_align);
childbox->y2 = childbox->y1 + (int) child_height;
}
}
/* Updates the minimum number of rows and columns needed for layout */
static void _xfdashboard_scaled_table_layout_update_rows_and_columns(XfdashboardScaledTableLayout *self,
ClutterContainer *inContainer)
{
XfdashboardScaledTableLayoutPrivate *priv;
ClutterRequestMode requestMode;
ClutterActorIter iter;
ClutterActor *child;
gint numberChildren;
gint rows;
gint columns;
g_return_if_fail(XFDASHBOARD_IS_SCALED_TABLE_LAYOUT(self));
g_return_if_fail(CLUTTER_IS_CONTAINER(inContainer));
g_return_if_fail(CLUTTER_IS_ACTOR(inContainer));
priv=self->priv;
/* Freeze notification */
g_object_freeze_notify(G_OBJECT(self));
/* Get number of visible child actors */
numberChildren=0;
clutter_actor_iter_init(&iter, CLUTTER_ACTOR(inContainer));
while(clutter_actor_iter_next(&iter, &child))
{
if(CLUTTER_ACTOR_IS_VISIBLE(child)) numberChildren++;
}
if(numberChildren!=priv->numberChildren)
{
priv->numberChildren=numberChildren;
g_object_notify_by_pspec(G_OBJECT(self), XfdashboardScaledTableLayoutProperties[PROP_NUMBER_CHILDREN]);
}
/* Get request mode to determine if more rows than colums are needed
* or the opposite
*/
requestMode=clutter_actor_get_request_mode(CLUTTER_ACTOR(inContainer));
/* Calculate and update number of rows and columns */
if(requestMode==CLUTTER_REQUEST_HEIGHT_FOR_WIDTH)
{
rows=ceil(sqrt((double)priv->numberChildren));
columns=ceil((double)priv->numberChildren / (double)priv->rows);
}
else
{
columns=ceil(sqrt((double)priv->numberChildren));
rows=ceil((double)priv->numberChildren / (double)priv->columns);
}
if(rows!=priv->rows)
{
priv->rows=rows;
g_object_notify_by_pspec(G_OBJECT(self), XfdashboardScaledTableLayoutProperties[PROP_ROWS]);
}
if(columns!=priv->columns)
{
priv->columns=columns;
g_object_notify_by_pspec(G_OBJECT(self), XfdashboardScaledTableLayoutProperties[PROP_COLUMNS]);
}
/* Thaw notification */
g_object_thaw_notify(G_OBJECT(self));
}
