static void
st_box_layout_allocate (ClutterActor *actor,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (actor)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor));
ClutterLayoutManager *layout = clutter_actor_get_layout_manager (actor);
ClutterActorBox content_box;
gfloat avail_width, avail_height, min_width, natural_width, min_height, natural_height;
CLUTTER_ACTOR_CLASS (st_box_layout_parent_class)->allocate (actor, box, flags);
st_theme_node_get_content_box (theme_node, box, &content_box);
clutter_actor_box_get_size (&content_box, &avail_width, &avail_height);
clutter_layout_manager_get_preferred_width (layout, CLUTTER_CONTAINER (actor),
avail_height,
&min_width, &natural_width);
clutter_layout_manager_get_preferred_height (layout, CLUTTER_CONTAINER (actor),
MAX (avail_width, min_width),
&min_height, &natural_height);
/* update adjustments for scrolling */
if (priv->vadjustment)
{
gdouble prev_value;
g_object_set (G_OBJECT (priv->vadjustment),
"lower", 0.0,
"upper", MAX (min_height, avail_height),
"page-size", avail_height,
"step-increment", avail_height / 6,
"page-increment", avail_height - avail_height / 6,
NULL);
prev_value = st_adjustment_get_value (priv->vadjustment);
st_adjustment_set_value (priv->vadjustment, prev_value);
}
if (priv->hadjustment)
{
gdouble prev_value;
g_object_set (G_OBJECT (priv->hadjustment),
"lower", 0.0,
"upper", MAX (min_width, avail_width),
"page-size", avail_width,
"step-increment", avail_width / 6,
"page-increment", avail_width - avail_width / 6,
NULL);
prev_value = st_adjustment_get_value (priv->hadjustment);
st_adjustment_set_value (priv->hadjustment, prev_value);
}
}
static void
calculate_and_scroll (ClutterActor *self,
gint mouse_x,
gint mouse_y,
gfloat box_x,
gfloat box_y,
gfloat width,
gfloat height)
{
StScrollViewPrivate *priv = ST_SCROLL_VIEW (self)->priv;
gboolean up;
gint sub_region;
gdouble delta, vvalue;
up = get_sub_region_y (mouse_y, box_y, height, &sub_region);
if (up)
delta = sub_region * -1.0 / AUTO_SCROLL_SPEED_DIVISOR;
else
delta = sub_region / AUTO_SCROLL_SPEED_DIVISOR;
g_object_get (priv->vadjustment,
"value", &vvalue,
NULL);
st_adjustment_set_value (priv->vadjustment, vvalue + delta);
}
static gboolean
st_scroll_bar_scroll_event (ClutterActor *actor,
ClutterScrollEvent *event)
{
StScrollBarPrivate *priv = ST_SCROLL_BAR (actor)->priv;
gdouble lower, step, upper, value;
if (priv->adjustment)
{
g_object_get (priv->adjustment,
"lower", &lower,
"step-increment", &step,
"upper", &upper,
"value", &value,
NULL);
}
else
{
return FALSE;
}
switch (event->direction)
{
case CLUTTER_SCROLL_UP:
case CLUTTER_SCROLL_LEFT:
if (value == lower)
return FALSE;
else
st_adjustment_set_value (priv->adjustment, value - step);
break;
case CLUTTER_SCROLL_DOWN:
case CLUTTER_SCROLL_RIGHT:
if (value == upper)
return FALSE;
else
st_adjustment_set_value (priv->adjustment, value + step);
break;
}
return TRUE;
}
static gboolean
st_scroll_bar_scroll_event (ClutterActor *actor,
ClutterScrollEvent *event)
{
StScrollBarPrivate *priv = ST_SCROLL_BAR (actor)->priv;
gdouble step, value, delta_x, delta_y;
if (priv->adjustment)
{
g_object_get (priv->adjustment,
"step-increment", &step,
"value", &value,
NULL);
}
else
{
return FALSE;
}
switch (event->direction)
{
case CLUTTER_SCROLL_SMOOTH:
clutter_event_get_scroll_delta ((ClutterEvent *)event,
&delta_x, &delta_y);
if (fabs (delta_x) > fabs(delta_y))
st_adjustment_set_value (priv->adjustment, value + delta_x);
else
st_adjustment_set_value (priv->adjustment, value + delta_y);
break;
case CLUTTER_SCROLL_UP:
case CLUTTER_SCROLL_LEFT:
st_adjustment_set_value (priv->adjustment, value - step);
break;
case CLUTTER_SCROLL_DOWN:
case CLUTTER_SCROLL_RIGHT:
st_adjustment_set_value (priv->adjustment, value + step);
break;
}
return TRUE;
}
/**
* st_adjustment_adjust_for_scroll_event:
* @adjustment: An #StAdjustment
* @delta: A delta, retrieved directly from clutter_event_get_scroll_delta()
* or similar.
*
* Adjusts the adjustment using delta values from a scroll event.
* You should use this instead of using st_adjustment_set_value()
* as this method will tweak the values directly using the same
* math as GTK+, to ensure that scrolling is consistent across
* the environment.
*/
void
st_adjustment_adjust_for_scroll_event (StAdjustment *adjustment,
gdouble delta)
{
StAdjustmentPrivate *priv;
gdouble new_value, scroll_unit;
g_return_if_fail (ST_IS_ADJUSTMENT (adjustment));
priv = st_adjustment_get_instance_private (adjustment);
scroll_unit = pow (priv->page_size, 2.0 / 3.0);
new_value = priv->value + delta * scroll_unit;
st_adjustment_set_value (adjustment, new_value);
}
static void
move_slider (StScrollBar *bar,
gfloat x,
gfloat y)
{
StScrollBarPrivate *priv = bar->priv;
gdouble position, lower, upper, page_size;
gfloat ux, uy, pos, size;
if (!priv->adjustment)
return;
if (!clutter_actor_transform_stage_point (priv->trough, x, y, &ux, &uy))
return;
if (priv->vertical)
size = clutter_actor_get_height (priv->trough)
- clutter_actor_get_height (priv->handle);
else
size = clutter_actor_get_width (priv->trough)
- clutter_actor_get_width (priv->handle);
if (size == 0)
return;
if (priv->vertical)
pos = uy - priv->y_origin;
else
pos = ux - priv->x_origin;
pos = CLAMP (pos, 0, size);
st_adjustment_get_values (priv->adjustment,
NULL,
&lower,
&upper,
NULL,
NULL,
&page_size);
position = ((pos / size)
* (upper - lower - page_size))
+ lower;
st_adjustment_set_value (priv->adjustment, position);
}
void
st_adjustment_set_values (StAdjustment *adjustment,
gdouble value,
gdouble lower,
gdouble upper,
gdouble step_increment,
gdouble page_increment,
gdouble page_size)
{
StAdjustmentPrivate *priv;
gboolean emit_changed = FALSE;
g_return_if_fail (ST_IS_ADJUSTMENT (adjustment));
g_return_if_fail (page_size >= 0 && page_size <= G_MAXDOUBLE);
g_return_if_fail (step_increment >= 0 && step_increment <= G_MAXDOUBLE);
g_return_if_fail (page_increment >= 0 && page_increment <= G_MAXDOUBLE);
priv = st_adjustment_get_instance_private (adjustment);
emit_changed = FALSE;
g_object_freeze_notify (G_OBJECT (adjustment));
emit_changed |= st_adjustment_set_lower (adjustment, lower);
emit_changed |= st_adjustment_set_upper (adjustment, upper);
emit_changed |= st_adjustment_set_step_increment (adjustment, step_increment);
emit_changed |= st_adjustment_set_page_increment (adjustment, page_increment);
emit_changed |= st_adjustment_set_page_size (adjustment, page_size);
if (value != priv->value)
{
st_adjustment_set_value (adjustment, value);
emit_changed = TRUE;
}
if (emit_changed)
g_signal_emit (G_OBJECT (adjustment), signals[CHANGED], 0);
g_object_thaw_notify (G_OBJECT (adjustment));
}
static void
st_adjustment_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
StAdjustment *adj = ST_ADJUSTMENT (gobject);
switch (prop_id)
{
case PROP_LOWER:
st_adjustment_set_lower (adj, g_value_get_double (value));
break;
case PROP_UPPER:
st_adjustment_set_upper (adj, g_value_get_double (value));
break;
case PROP_VALUE:
st_adjustment_set_value (adj, g_value_get_double (value));
break;
case PROP_STEP_INC:
st_adjustment_set_step_increment (adj, g_value_get_double (value));
break;
case PROP_PAGE_INC:
st_adjustment_set_page_increment (adj, g_value_get_double (value));
break;
case PROP_PAGE_SIZE:
st_adjustment_set_page_size (adj, g_value_get_double (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static gboolean
st_scroll_view_scroll_event (ClutterActor *self,
ClutterScrollEvent *event)
{
StScrollViewPrivate *priv = ST_SCROLL_VIEW (self)->priv;
gdouble value, step, hvalue, vvalue, delta_x, delta_y;
/* don't handle scroll events if requested not to */
if (!priv->mouse_scroll)
return FALSE;
switch (event->direction)
{
case CLUTTER_SCROLL_SMOOTH:
clutter_event_get_scroll_delta ((ClutterEvent *)event,
&delta_x, &delta_y);
g_object_get (priv->hadjustment,
"value", &hvalue,
NULL);
g_object_get (priv->vadjustment,
"value", &vvalue,
NULL);
break;
case CLUTTER_SCROLL_UP:
case CLUTTER_SCROLL_DOWN:
g_object_get (priv->vadjustment,
"step-increment", &step,
"value", &value,
NULL);
break;
case CLUTTER_SCROLL_LEFT:
case CLUTTER_SCROLL_RIGHT:
g_object_get (priv->hadjustment,
"step-increment", &step,
"value", &value,
NULL);
break;
}
switch (event->direction)
{
case CLUTTER_SCROLL_SMOOTH:
st_adjustment_set_value (priv->hadjustment, hvalue + delta_x);
st_adjustment_set_value (priv->vadjustment, vvalue + delta_y);
break;
case CLUTTER_SCROLL_UP:
st_adjustment_set_value (priv->vadjustment, value - step);
break;
case CLUTTER_SCROLL_DOWN:
st_adjustment_set_value (priv->vadjustment, value + step);
break;
case CLUTTER_SCROLL_LEFT:
st_adjustment_set_value (priv->hadjustment, value - step);
break;
case CLUTTER_SCROLL_RIGHT:
st_adjustment_set_value (priv->hadjustment, value + step);
break;
}
return TRUE;
}
static gboolean
st_scroll_view_scroll_event (ClutterActor *self,
ClutterScrollEvent *event)
{
StScrollViewPrivate *priv = ST_SCROLL_VIEW (self)->priv;
gdouble lower, value, upper, step;
/* don't handle scroll events if requested not to */
if (!priv->mouse_scroll)
return FALSE;
switch (event->direction)
{
case CLUTTER_SCROLL_UP:
case CLUTTER_SCROLL_DOWN:
g_object_get (priv->vadjustment,
"lower", &lower,
"step-increment", &step,
"value", &value,
"upper", &upper,
NULL);
break;
case CLUTTER_SCROLL_LEFT:
case CLUTTER_SCROLL_RIGHT:
g_object_get (priv->hadjustment,
"lower", &lower,
"step-increment", &step,
"value", &value,
"upper", &upper,
NULL);
break;
}
switch (event->direction)
{
case CLUTTER_SCROLL_UP:
if (value == lower)
return FALSE;
else
st_adjustment_set_value (priv->vadjustment, value - step);
break;
case CLUTTER_SCROLL_DOWN:
if (value == upper)
return FALSE;
else
st_adjustment_set_value (priv->vadjustment, value + step);
break;
case CLUTTER_SCROLL_LEFT:
if (value == lower)
return FALSE;
else
st_adjustment_set_value (priv->hadjustment, value - step);
break;
case CLUTTER_SCROLL_RIGHT:
if (value == upper)
return FALSE;
else
st_adjustment_set_value (priv->hadjustment, value + step);
break;
}
return TRUE;
}
static void
st_box_layout_allocate (ClutterActor *actor,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
StBoxLayoutPrivate *priv = ST_BOX_LAYOUT (actor)->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor));
ClutterActorBox content_box;
gfloat avail_width, avail_height, min_width, natural_width, min_height, natural_height;
gfloat position, next_position;
GList *l, *children;
gint n_expand_children = 0, i;
gfloat expand_amount, shrink_amount;
BoxChildShrink *shrinks = NULL;
gboolean flip = (st_widget_get_direction (ST_WIDGET (actor)) == ST_TEXT_DIRECTION_RTL)
&& (!priv->is_vertical);
CLUTTER_ACTOR_CLASS (st_box_layout_parent_class)->allocate (actor, box,
flags);
children = st_container_get_children_list (ST_CONTAINER (actor));
if (children == NULL)
return;
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;
get_content_preferred_width (ST_BOX_LAYOUT (actor), avail_height,
&min_width, &natural_width);
get_content_preferred_height (ST_BOX_LAYOUT (actor), MAX (avail_width, min_width),
&min_height, &natural_height);
/* update adjustments for scrolling */
if (priv->vadjustment)
{
gdouble prev_value;
g_object_set (G_OBJECT (priv->vadjustment),
"lower", 0.0,
"upper", MAX (min_height, avail_height),
"page-size", avail_height,
"step-increment", avail_height / 6,
"page-increment", avail_height - avail_height / 6,
NULL);
prev_value = st_adjustment_get_value (priv->vadjustment);
st_adjustment_set_value (priv->vadjustment, prev_value);
}
if (priv->hadjustment)
{
gdouble prev_value;
g_object_set (G_OBJECT (priv->hadjustment),
"lower", 0.0,
"upper", MAX (min_width, avail_width),
"page-size", avail_width,
"step-increment", avail_width / 6,
"page-increment", avail_width - avail_width / 6,
NULL);
prev_value = st_adjustment_get_value (priv->hadjustment);
st_adjustment_set_value (priv->hadjustment, prev_value);
}
if (avail_height < min_height)
{
avail_height = min_height;
content_box.y2 = content_box.y1 + avail_height;
}
if (avail_width < min_width)
{
avail_width = min_width;
content_box.x2 = content_box.x1 + avail_width;
}
if (priv->is_vertical)
{
expand_amount = MAX (0, avail_height - natural_height);
shrink_amount = MAX (0, natural_height - avail_height);
}
else
{
expand_amount = MAX (0, avail_width - natural_width);
shrink_amount = MAX (0, natural_width - avail_width);
}
if (expand_amount > 0)
{
/* count the number of children with expand set to TRUE */
n_expand_children = 0;
for (l = children; l; l = l->next)
{
ClutterActor *child = l->data;
gboolean expand;
if (!CLUTTER_ACTOR_IS_VISIBLE (child) ||
clutter_actor_get_fixed_position_set (child))
continue;
clutter_container_child_get ((ClutterContainer *) actor,
child,
"expand", &expand,
NULL);
if (expand)
n_expand_children++;
}
if (n_expand_children == 0)
expand_amount = 0;
}
else if (shrink_amount > 0)
{
shrinks = compute_shrinks (ST_BOX_LAYOUT (actor),
priv->is_vertical ? avail_width : avail_height,
shrink_amount);
}
if (priv->is_vertical)
position = content_box.y1;
else if (flip)
position = content_box.x2;
else
position = content_box.x1;
if (priv->is_pack_start)
{
l = g_list_last (children);
i = g_list_length (children);
}
else
{
l = children;
i = 0;
}
gboolean firstchild = TRUE;
gfloat init_padding = (avail_width/2) - (natural_width/2);
while (l)
{
ClutterActor *child = (ClutterActor*) l->data;
ClutterActorBox child_box;
gfloat child_min, child_nat, child_allocated;
gboolean xfill, yfill, expand, fixed;
StAlign xalign, yalign;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
goto next_child;
fixed = clutter_actor_get_fixed_position_set (child);
if (fixed)
{
clutter_actor_allocate_preferred_size (child, flags);
goto next_child;
}
clutter_container_child_get ((ClutterContainer*) actor, child,
"x-fill", &xfill,
"y-fill", &yfill,
"x-align", &xalign,
"y-align", &yalign,
"expand", &expand,
NULL);
if (priv->is_vertical)
{
_st_actor_get_preferred_height (child, avail_width, xfill,
&child_min, &child_nat);
}
else
{
_st_actor_get_preferred_width (child, avail_height, yfill,
&child_min, &child_nat);
}
child_allocated = child_nat;
if (expand_amount > 0 && expand)
child_allocated += expand_amount / n_expand_children;
else if (shrink_amount > 0)
child_allocated -= shrinks[i].shrink_amount;
if (flip) {
next_position = position - child_allocated;
if (xalign == ST_ALIGN_CENTER_SPECIAL && next_position < content_box.x1)
next_position = content_box.x1;
}
else {
next_position = position + child_allocated;
if (xalign == ST_ALIGN_CENTER_SPECIAL && next_position > content_box.x2)
next_position = content_box.x2;
}
if (priv->is_vertical)
{
child_box.y1 = (int)(0.5 + position);
child_box.y2 = (int)(0.5 + next_position);
child_box.x1 = content_box.x1;
child_box.x2 = content_box.x2;
_st_allocate_fill (ST_WIDGET (actor), child, &child_box,
xalign, yalign, xfill, yfill);
clutter_actor_allocate (child, &child_box, flags);
}
else
{
if (flip)
{
if (firstchild && xalign == ST_ALIGN_CENTER_SPECIAL)
{
position -= init_padding;
next_position = position - child_allocated;
firstchild = FALSE;
}
if (xalign == ST_ALIGN_CENTER_SPECIAL && position > content_box.x2) {
position = content_box.x2;
}
child_box.x1 = (int)(0.5 + next_position);
child_box.x2 = (int)(0.5 + position);
}
else
{
if (firstchild && xalign == ST_ALIGN_CENTER_SPECIAL)
{
position += init_padding;
if (position < content_box.x1) {
position = content_box.x1;
}
next_position = position + child_allocated;
firstchild = FALSE;
}
if (xalign == ST_ALIGN_CENTER_SPECIAL && position < content_box.x1) {
position = content_box.x1;
}
child_box.x1 = (int)(0.5 + position);
child_box.x2 = (int)(0.5 + next_position);
}
child_box.y1 = content_box.y1;
child_box.y2 = content_box.y2;
_st_allocate_fill (ST_WIDGET (actor), child, &child_box,
xalign, yalign, xfill, yfill);
clutter_actor_allocate (child, &child_box, flags);
}
if (flip)
position = next_position - priv->spacing;
else
position = next_position + priv->spacing;
next_child:
if (priv->is_pack_start)
{
l = l->prev;
i--;
}
else
{
l = l->next;
i++;
}
}
if (shrinks)
g_free (shrinks);
}
