static void
clutter_flow_layout_allocate (ClutterLayoutManager *manager,
ClutterContainer *container,
const ClutterActorBox *allocation,
ClutterAllocationFlags flags)
{
ClutterFlowLayoutPrivate *priv = CLUTTER_FLOW_LAYOUT (manager)->priv;
ClutterActor *actor, *child;
ClutterActorIter iter;
gfloat x_off, y_off;
gfloat avail_width, avail_height;
gfloat item_x, item_y;
gint line_item_count;
gint items_per_line;
gint line_index;
actor = CLUTTER_ACTOR (container);
if (clutter_actor_get_n_children (actor) == 0)
return;
clutter_actor_box_get_origin (allocation, &x_off, &y_off);
clutter_actor_box_get_size (allocation, &avail_width, &avail_height);
/* blow the cached preferred size and re-compute with the given
* available size in case the FlowLayout wasn't given the exact
* size it requested
*/
if ((priv->req_width >= 0 && avail_width != priv->req_width) ||
(priv->req_height >= 0 && avail_height != priv->req_height))
{
clutter_flow_layout_get_preferred_width (manager, container,
avail_height,
NULL, NULL);
clutter_flow_layout_get_preferred_height (manager, container,
avail_width,
NULL, NULL);
}
items_per_line = compute_lines (CLUTTER_FLOW_LAYOUT (manager),
avail_width, avail_height);
item_x = x_off;
item_y = y_off;
line_item_count = 0;
line_index = 0;
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_next (&iter, &child))
{
ClutterActorBox child_alloc;
gfloat item_width, item_height;
gfloat new_x, new_y;
gfloat child_min, child_natural;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
new_x = new_y = 0;
if (!priv->snap_to_grid)
clutter_actor_get_preferred_size (child,
NULL, NULL,
&item_width,
&item_height);
if (priv->orientation == CLUTTER_FLOW_HORIZONTAL)
{
if ((priv->snap_to_grid &&
line_item_count == items_per_line && line_item_count > 0) ||
(!priv->snap_to_grid && item_x + item_width > avail_width))
{
item_y += g_array_index (priv->line_natural,
gfloat,
line_index);
if (line_index >= 0)
item_y += priv->row_spacing;
line_item_count = 0;
line_index += 1;
item_x = x_off;
}
if (priv->snap_to_grid)
{
new_x = x_off + ((line_item_count + 1) * (avail_width + priv->col_spacing))
/ items_per_line;
item_width = new_x - item_x - priv->col_spacing;
}
else
{
new_x = item_x + item_width + priv->col_spacing;
}
item_height = g_array_index (priv->line_natural,
gfloat,
line_index);
}
else
{
if ((priv->snap_to_grid &&
line_item_count == items_per_line && line_item_count > 0) ||
(!priv->snap_to_grid && item_y + item_height > avail_height))
{
item_x += g_array_index (priv->line_natural,
gfloat,
line_index);
if (line_index >= 0)
item_x += priv->col_spacing;
line_item_count = 0;
line_index += 1;
item_y = y_off;
}
if (priv->snap_to_grid)
{
new_y = y_off + ((line_item_count + 1) * (avail_height + priv->row_spacing))
/ items_per_line;
item_height = new_y - item_y - priv->row_spacing;
}
else
{
new_y = item_y + item_height + priv->row_spacing;
}
item_width = g_array_index (priv->line_natural,
gfloat,
line_index);
}
if (!priv->is_homogeneous &&
!clutter_actor_needs_expand (child,
CLUTTER_ORIENTATION_HORIZONTAL))
{
clutter_actor_get_preferred_width (child, item_height,
&child_min,
&child_natural);
item_width = MIN (item_width, child_natural);
}
if (!priv->is_homogeneous &&
!clutter_actor_needs_expand (child,
CLUTTER_ORIENTATION_VERTICAL))
{
clutter_actor_get_preferred_height (child, item_width,
&child_min,
&child_natural);
item_height = MIN (item_height, child_natural);
}
CLUTTER_NOTE (LAYOUT,
"flow[line:%d, item:%d/%d] ="
"{ %.2f, %.2f, %.2f, %.2f }",
line_index, line_item_count + 1, items_per_line,
item_x, item_y, item_width, item_height);
child_alloc.x1 = ceil (item_x);
child_alloc.y1 = ceil (item_y);
child_alloc.x2 = ceil (child_alloc.x1 + item_width);
child_alloc.y2 = ceil (child_alloc.y1 + item_height);
clutter_actor_allocate (child, &child_alloc, flags);
if (priv->orientation == CLUTTER_FLOW_HORIZONTAL)
item_x = new_x;
else
item_y = new_y;
line_item_count += 1;
}
}
static void
clutter_bin_layout_allocate (ClutterLayoutManager *manager,
ClutterContainer *container,
const ClutterActorBox *allocation,
ClutterAllocationFlags flags)
{
gfloat allocation_x, allocation_y;
gfloat available_w, available_h;
ClutterActor *actor, *child;
ClutterActorIter iter;
gboolean use_animations;
ClutterAnimationMode easing_mode;
guint easing_duration, easing_delay;
clutter_actor_box_get_origin (allocation, &allocation_x, &allocation_y);
clutter_actor_box_get_size (allocation, &available_w, &available_h);
actor = CLUTTER_ACTOR (container);
use_animations = clutter_layout_manager_get_easing_state (manager,
&easing_mode,
&easing_duration,
&easing_delay);
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_next (&iter, &child))
{
ClutterLayoutMeta *meta;
ClutterBinLayer *layer;
ClutterActorBox child_alloc = { 0, };
gdouble x_align, y_align;
gboolean x_fill, y_fill;
meta = clutter_layout_manager_get_child_meta (manager,
container,
child);
layer = CLUTTER_BIN_LAYER (meta);
if (layer->x_align == CLUTTER_BIN_ALIGNMENT_FIXED)
child_alloc.x1 = clutter_actor_get_x (child);
else
child_alloc.x1 = allocation_x;
if (layer->y_align == CLUTTER_BIN_ALIGNMENT_FIXED)
child_alloc.y1 = clutter_actor_get_y (child);
else
child_alloc.y1 = allocation_y;
child_alloc.x2 = available_w;
child_alloc.y2 = available_h;
if (clutter_actor_needs_expand (child, CLUTTER_ORIENTATION_HORIZONTAL))
{
ClutterActorAlign align;
align = _clutter_actor_get_effective_x_align (child);
x_fill = align == CLUTTER_ACTOR_ALIGN_FILL;
x_align = get_actor_align_factor (align);
}
else
{
x_fill = (layer->x_align == CLUTTER_BIN_ALIGNMENT_FILL);
x_align = get_bin_alignment_factor (layer->x_align);
}
if (clutter_actor_needs_expand (child, CLUTTER_ORIENTATION_VERTICAL))
{
ClutterActorAlign align;
align = clutter_actor_get_y_align (child);
y_fill = align == CLUTTER_ACTOR_ALIGN_FILL;
y_align = get_actor_align_factor (align);
}
else
{
y_fill = (layer->y_align == CLUTTER_BIN_ALIGNMENT_FILL);
y_align = get_bin_alignment_factor (layer->y_align);
}
if (use_animations)
{
clutter_actor_save_easing_state (child);
clutter_actor_set_easing_mode (child, easing_mode);
clutter_actor_set_easing_duration (child, easing_duration);
clutter_actor_set_easing_delay (child, easing_delay);
}
clutter_actor_allocate_align_fill (child, &child_alloc,
x_align, y_align,
x_fill, y_fill,
flags);
if (use_animations)
clutter_actor_restore_easing_state (child);
}
}
static void
calculate_col_widths (ClutterTableLayout *self,
ClutterContainer *container,
gint for_width)
{
ClutterTableLayoutPrivate *priv = self->priv;
ClutterLayoutManager *manager = CLUTTER_LAYOUT_MANAGER (self);
ClutterActor *actor, *child;
gint i;
DimensionData *columns;
ClutterOrientation orientation = CLUTTER_ORIENTATION_HORIZONTAL;
update_row_col (self, container);
g_array_set_size (priv->columns, 0);
g_array_set_size (priv->columns, priv->n_cols);
columns = (DimensionData *) (void *) priv->columns->data;
/* reset the visibility of all columns */
priv->visible_cols = 0;
for (i = 0; i < priv->n_cols; i++)
{
columns[i].expand = FALSE;
columns[i].visible = FALSE;
}
actor = CLUTTER_ACTOR (container);
/* STAGE ONE: calculate column widths for non-spanned children */
for (child = clutter_actor_get_first_child (actor);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
ClutterTableChild *meta;
DimensionData *col;
gfloat c_min, c_pref;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
meta =
CLUTTER_TABLE_CHILD (clutter_layout_manager_get_child_meta (manager,
container,
child));
if (meta->col_span > 1)
continue;
col = &columns[meta->col];
if (!col->visible)
{
col->visible = TRUE;
priv->visible_cols += 1;
}
clutter_actor_get_preferred_width (child, -1, &c_min, &c_pref);
col->min_size = MAX (col->min_size, c_min);
col->pref_size = MAX (col->pref_size, c_pref);
if (!col->expand)
col->expand = clutter_actor_needs_expand (child, orientation);
}
/* STAGE TWO: take spanning children into account */
for (child = clutter_actor_get_first_child (actor);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
ClutterTableChild *meta;
gfloat c_min, c_pref;
gfloat min_width, pref_width;
gint start_col, end_col;
gint n_expand;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
meta =
CLUTTER_TABLE_CHILD (clutter_layout_manager_get_child_meta (manager,
container,
child));
if (meta->col_span < 2)
continue;
start_col = meta->col;
end_col = meta->col + meta->col_span - 1;
clutter_actor_get_preferred_width (child, -1, &c_min, &c_pref);
/* check there is enough room for this actor */
min_width = 0;
pref_width = 0;
n_expand = 0;
for (i = start_col; i <= end_col; i++)
{
min_width += columns[i].min_size;
pref_width += columns[i].pref_size;
if (columns[i].expand)
n_expand++;
if (!columns[i].visible)
{
columns[i].visible = TRUE;
priv->visible_cols += 1;
}
if (!columns[i].expand)
columns[i].expand = clutter_actor_needs_expand (child, orientation);
}
min_width += priv->col_spacing * (meta->col_span - 1);
pref_width += priv->col_spacing * (meta->col_span - 1);
/* see calculate_row_heights() for comments */
/* (1) */
if (c_min > min_width)
{
/* (2) */
/* we can start from preferred width and decrease */
if (pref_width > c_min)
{
for (i = start_col; i <= end_col; i++)
columns[i].final_size = columns[i].pref_size;
while (pref_width > c_min)
{
for (i = start_col; i <= end_col; i++)
{
if (columns[i].final_size > columns[i].min_size)
{
columns[i].final_size--;
pref_width--;
}
}
}
for (i = start_col; i <= end_col; i++)
columns[i].min_size = columns[i].final_size;
}
else
{
/* (3) */
/* we can expand from preferred size */
gfloat expand_by;
expand_by = c_pref - pref_width;
for (i = start_col; i <= end_col; i++)
{
if (n_expand)
{
if (columns[i].expand)
columns[i].min_size = columns[i].pref_size
+ expand_by / n_expand;
}
else
columns[i].min_size = columns[i].pref_size
+ expand_by / meta->col_span;
}
}
}
}
/* calculate final widths */
if (for_width >= 0)
{
gfloat min_width, pref_width;
gint n_expand;
min_width = 0;
pref_width = 0;
n_expand = 0;
for (i = 0; i < self->priv->n_cols; i++)
{
pref_width += columns[i].pref_size;
min_width += columns[i].min_size;
if (columns[i].expand)
n_expand++;
}
pref_width += priv->col_spacing * (priv->n_cols - 1);
min_width += priv->col_spacing * (priv->n_cols - 1);
if (for_width <= min_width)
{
/* erk, we can't shrink this! */
for (i = 0; i < priv->n_cols; i++)
columns[i].final_size = columns[i].min_size;
return;
}
if (for_width == pref_width)
{
/* perfect! */
for (i = 0; i < self->priv->n_cols; i++)
columns[i].final_size = columns[i].pref_size;
return;
}
/* for_width is between min_width and pref_width */
if (for_width < pref_width && for_width > min_width)
{
gfloat width;
/* shrink columns until they reach min_width */
/* start with all columns at preferred size */
for (i = 0; i < self->priv->n_cols; i++)
columns[i].final_size = columns[i].pref_size;
width = pref_width;
while (width > for_width)
{
for (i = 0; i < self->priv->n_cols; i++)
{
if (columns[i].final_size > columns[i].min_size)
{
columns[i].final_size--;
width--;
}
}
}
return;
}
/* expand columns */
if (for_width > pref_width)
{
gfloat extra_width = for_width - pref_width;
gint remaining;
if (n_expand)
remaining = (gint) extra_width % n_expand;
else
remaining = (gint) extra_width % priv->n_cols;
for (i = 0; i < self->priv->n_cols; i++)
{
if (columns[i].expand)
{
columns[i].final_size = columns[i].pref_size
+ (extra_width / n_expand);
}
else
columns[i].final_size = columns[i].pref_size;
}
/* distribute the remainder among children */
i = 0;
while (remaining)
{
columns[i].final_size++;
i++;
remaining--;
}
}
}
}
static void
calculate_row_heights (ClutterTableLayout *self,
ClutterContainer *container,
gint for_height)
{
ClutterTableLayoutPrivate *priv = self->priv;
ClutterLayoutManager *manager = CLUTTER_LAYOUT_MANAGER (self);
ClutterActor *actor, *child;
gint i;
DimensionData *rows, *columns;
ClutterOrientation orientation = CLUTTER_ORIENTATION_VERTICAL;
update_row_col (self, container);
g_array_set_size (priv->rows, 0);
g_array_set_size (priv->rows, self->priv->n_rows);
rows = (DimensionData *) (void *) priv->rows->data;
columns = (DimensionData *) (void *) priv->columns->data;
/* reset the visibility of all rows */
priv->visible_rows = 0;
for (i = 0; i < priv->n_rows; i++)
{
rows[i].expand = FALSE;
rows[i].visible = FALSE;
}
actor = CLUTTER_ACTOR (container);
/* STAGE ONE: calculate row heights for non-spanned children */
for (child = clutter_actor_get_first_child (actor);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
ClutterTableChild *meta;
DimensionData *row;
gfloat c_min, c_pref;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
meta =
CLUTTER_TABLE_CHILD (clutter_layout_manager_get_child_meta (manager,
container,
child));
if (meta->row_span > 1)
continue;
row = &rows[meta->row];
if (!row->visible)
{
row->visible = TRUE;
priv->visible_rows += 1;
}
clutter_actor_get_preferred_height (child, columns[meta->col].final_size,
&c_min, &c_pref);
row->min_size = MAX (row->min_size, c_min);
row->pref_size = MAX (row->pref_size, c_pref);
if (!row->expand)
row->expand = clutter_actor_needs_expand (child, orientation);
}
/* STAGE TWO: take spanning children into account */
for (child = clutter_actor_get_first_child (actor);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
ClutterTableChild *meta;
gfloat c_min, c_pref;
gfloat min_height, pref_height;
gint start_row, end_row;
gint n_expand;
if (!CLUTTER_ACTOR_IS_VISIBLE (child))
continue;
meta =
CLUTTER_TABLE_CHILD (clutter_layout_manager_get_child_meta (manager,
container,
child));
if (meta->row_span < 2)
continue;
start_row = meta->row;
end_row = meta->row + meta->row_span - 1;
clutter_actor_get_preferred_height (child, columns[meta->col].final_size,
&c_min, &c_pref);
/* check there is enough room for this actor */
min_height = 0;
pref_height = 0;
n_expand = 0;
for (i = start_row; i <= end_row; i++)
{
min_height += rows[i].min_size;
pref_height += rows[i].pref_size;
if (rows[i].expand)
n_expand++;
if (!rows[i].visible)
{
rows[i].visible = TRUE;
priv->visible_rows += 1;
}
if (!rows[i].expand)
rows[i].expand = clutter_actor_needs_expand (child, orientation);
}
min_height += priv->row_spacing * (meta->row_span - 1);
pref_height += priv->row_spacing * (meta->row_span - 1);
/* 1) If the minimum height of the rows spanned is less than the
* minimum height of the child that is spanning them, then we
* must increase the minimum height of the rows spanned.
*
* 2) If the preferred height of the spanned rows is more than
* the minimum height of the spanning child, then we can start
* at this size and decrease each row evenly.
*
* 3) If the preferred height of the rows is more than the minimum
* height of the spanned child, then we can start at the preferred
* height and expand.
*/
/* (1) */
if (c_min > min_height)
{
/* (2) */
/* we can start from preferred height and decrease */
if (pref_height > c_min)
{
for (i = start_row; i <= end_row; i++)
rows[i].final_size = rows[i].pref_size;
while (pref_height > c_min)
{
for (i = start_row; i <= end_row; i++)
{
if (rows[i].final_size > rows[i].min_size)
{
rows[i].final_size--;
pref_height--;
}
}
}
for (i = start_row; i <= end_row; i++)
rows[i].min_size = rows[i].final_size;
}
else
{
/* (3) */
/* we can expand from preferred size */
gfloat expand_by = c_pref - pref_height;
for (i = start_row; i <= end_row; i++)
{
if (n_expand)
{
if (rows[i].expand)
rows[i].min_size = rows[i].pref_size
+ expand_by / n_expand;
}
else
rows[i].min_size = rows[i].pref_size
+ expand_by / meta->row_span;
}
}
}
}
/* calculate final heights */
if (for_height >= 0)
{
gfloat min_height, pref_height;
gint n_expand;
min_height = 0;
pref_height = 0;
n_expand = 0;
for (i = 0; i < self->priv->n_rows; i++)
{
pref_height += rows[i].pref_size;
min_height += rows[i].min_size;
if (rows[i].expand)
n_expand++;
}
pref_height += priv->row_spacing * (priv->n_rows - 1);
min_height += priv->row_spacing * (priv->n_rows - 1);
if (for_height <= min_height)
{
/* erk, we can't shrink this! */
for (i = 0; i < self->priv->n_rows; i++)
rows[i].final_size = rows[i].min_size;
return;
}
if (for_height == pref_height)
{
/* perfect! */
for (i = 0; i < self->priv->n_rows; i++)
rows[i].final_size = rows[i].pref_size;
return;
}
/* for_height is between min_height and pref_height */
if (for_height < pref_height && for_height > min_height)
{
gfloat height;
/* shrink rows until they reach min_height */
/* start with all rows at preferred size */
for (i = 0; i < self->priv->n_rows; i++)
rows[i].final_size = rows[i].pref_size;
height = pref_height;
while (height > for_height)
{
for (i = 0; i < priv->n_rows; i++)
{
if (rows[i].final_size > rows[i].min_size)
{
rows[i].final_size--;
height--;
}
}
}
return;
}
/* expand rows */
if (for_height > pref_height)
{
gfloat extra_height = for_height - pref_height;
gint remaining;
if (n_expand)
remaining = (gint) extra_height % n_expand;
else
remaining = (gint) extra_height % self->priv->n_rows;
for (i = 0; i < self->priv->n_rows; i++)
{
if (rows[i].expand)
{
rows[i].final_size = rows[i].pref_size
+ (extra_height / n_expand);
}
else
rows[i].final_size = rows[i].pref_size;
}
/* distribute the remainder among children */
i = 0;
while (remaining)
{
rows[i].final_size++;
i++;
remaining--;
}
}
}
}
static void
clutter_bin_layout_allocate (ClutterLayoutManager *manager,
ClutterContainer *container,
const ClutterActorBox *allocation,
ClutterAllocationFlags flags)
{
gfloat allocation_x, allocation_y;
gfloat available_w, available_h;
ClutterActor *actor, *child;
ClutterActorIter iter;
clutter_actor_box_get_origin (allocation, &allocation_x, &allocation_y);
clutter_actor_box_get_size (allocation, &available_w, &available_h);
actor = CLUTTER_ACTOR (container);
clutter_actor_iter_init (&iter, actor);
while (clutter_actor_iter_next (&iter, &child))
{
ClutterLayoutMeta *meta;
ClutterBinLayer *layer;
ClutterActorBox child_alloc = { 0, };
gdouble x_align, y_align;
gboolean x_fill, y_fill, is_fixed_position_set;
float fixed_x, fixed_y;
if (!clutter_actor_is_visible (child))
continue;
meta = clutter_layout_manager_get_child_meta (manager,
container,
child);
layer = CLUTTER_BIN_LAYER (meta);
fixed_x = fixed_y = 0.f;
g_object_get (child,
"fixed-position-set", &is_fixed_position_set,
"fixed-x", &fixed_x,
"fixed-y", &fixed_y,
NULL);
/* XXX:2.0 - remove the FIXED alignment, and just use the fixed position
* of the actor if one is set
*/
if (is_fixed_position_set ||
layer->x_align == CLUTTER_BIN_ALIGNMENT_FIXED)
{
if (is_fixed_position_set)
child_alloc.x1 = fixed_x;
else
child_alloc.x1 = clutter_actor_get_x (child);
}
else
child_alloc.x1 = allocation_x;
if (is_fixed_position_set ||
layer->y_align == CLUTTER_BIN_ALIGNMENT_FIXED)
{
if (is_fixed_position_set)
child_alloc.y1 = fixed_y;
else
child_alloc.y1 = clutter_actor_get_y (child);
}
else
child_alloc.y1 = allocation_y;
child_alloc.x2 = allocation_x + available_w;
child_alloc.y2 = allocation_y + available_h;
if (clutter_actor_needs_expand (child, CLUTTER_ORIENTATION_HORIZONTAL))
{
ClutterActorAlign align;
align = clutter_actor_get_x_align (child);
x_fill = align == CLUTTER_ACTOR_ALIGN_FILL;
x_align = get_actor_align_factor (align);
}
else
{
ClutterTextDirection text_dir;
x_fill = (layer->x_align == CLUTTER_BIN_ALIGNMENT_FILL);
text_dir = clutter_actor_get_text_direction (child);
if (!is_fixed_position_set)
x_align = get_bin_alignment_factor (layer->x_align, text_dir);
else
x_align = 0.0;
}
if (clutter_actor_needs_expand (child, CLUTTER_ORIENTATION_VERTICAL))
{
ClutterActorAlign align;
align = clutter_actor_get_y_align (child);
y_fill = align == CLUTTER_ACTOR_ALIGN_FILL;
y_align = get_actor_align_factor (align);
}
else
{
y_fill = (layer->y_align == CLUTTER_BIN_ALIGNMENT_FILL);
if (!is_fixed_position_set)
y_align = get_bin_alignment_factor (layer->y_align,
CLUTTER_TEXT_DIRECTION_LTR);
else
y_align = 0.0;
}
clutter_actor_allocate_align_fill (child, &child_alloc,
x_align, y_align,
x_fill, y_fill,
flags);
}
}
