1148 lines
34 KiB
C
1148 lines
34 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author:
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* Emmanuele Bassi <ebassi@linux.intel.com>
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*
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* Based on the NBTK NbtkBoxLayout actor by:
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* Thomas Wood <thomas.wood@intel.com>
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*/
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/**
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* ClutterBoxLayout:
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*
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* A layout manager arranging children on a single line
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*
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* The #ClutterBoxLayout is a [class@Clutter.LayoutManager] implementing the
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* following layout policy:
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*
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* - all children are arranged on a single line
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* - the axis used is controlled by the [property@Clutter.BoxLayout:orientation] property
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* - each child will be allocated to its natural size or, if [property@Clutter.Actor:x-expand] or
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* [property@Clutter.Actor:y-expand] are set, the available size
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* - honours the #ClutterActor's [property@Clutter.Actor:x-align] and [property@Clutter.Actor:y-align] properties
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* to fill the available size
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* - if the [property@Clutter.BoxLayout:homogeneous] boolean property is set, then all widgets will
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* get the same size, ignoring expand settings and the preferred sizes
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*
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* It is possible to control the spacing between children of a
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* #ClutterBoxLayout by using [method@Clutter.BoxLayout.set_spacing].
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*/
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#include "config.h"
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#include <math.h>
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#include "clutter/clutter-box-layout.h"
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#include "clutter/clutter-actor-private.h"
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#include "clutter/clutter-debug.h"
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#include "clutter/clutter-enum-types.h"
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#include "clutter/clutter-layout-meta.h"
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#include "clutter/clutter-private.h"
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#include "clutter/clutter-types.h"
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typedef struct _ClutterBoxLayoutPrivate
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{
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ClutterActor *container;
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guint spacing;
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ClutterAnimationMode easing_mode;
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guint easing_duration;
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ClutterOrientation orientation;
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guint is_homogeneous : 1;
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} ClutterBoxLayoutPrivate;
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enum
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{
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PROP_0,
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PROP_SPACING,
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PROP_HOMOGENEOUS,
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PROP_ORIENTATION,
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PROP_LAST
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};
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static GParamSpec *obj_props[PROP_LAST] = { NULL, };
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G_DEFINE_TYPE_WITH_PRIVATE (ClutterBoxLayout,
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clutter_box_layout,
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CLUTTER_TYPE_LAYOUT_MANAGER)
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typedef struct _RequestedSize
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{
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ClutterActor *actor;
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gfloat minimum_size;
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gfloat natural_size;
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} RequestedSize;
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static float distribute_natural_allocation (float extra_space,
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unsigned int n_requested_sizes,
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RequestedSize *sizes);
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static void count_expand_children (ClutterLayoutManager *layout,
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ClutterActor *container,
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gint *visible_children,
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gint *expand_children);
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static void
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clutter_box_layout_set_container (ClutterLayoutManager *layout,
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ClutterActor *container)
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{
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ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (layout);
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ClutterBoxLayoutPrivate *priv =
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clutter_box_layout_get_instance_private (self);
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ClutterLayoutManagerClass *parent_class;
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priv->container = container;
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if (priv->container != NULL)
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{
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ClutterRequestMode request_mode;
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/* we need to change the :request-mode of the container
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* to match the orientation
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*/
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request_mode = priv->orientation == CLUTTER_ORIENTATION_VERTICAL
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? CLUTTER_REQUEST_HEIGHT_FOR_WIDTH
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: CLUTTER_REQUEST_WIDTH_FOR_HEIGHT;
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clutter_actor_set_request_mode (CLUTTER_ACTOR (priv->container),
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request_mode);
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}
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parent_class = CLUTTER_LAYOUT_MANAGER_CLASS (clutter_box_layout_parent_class);
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parent_class->set_container (layout, container);
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}
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static void
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get_child_size (ClutterActor *actor,
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ClutterOrientation orientation,
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gfloat for_size,
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gfloat *min_size_p,
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gfloat *natural_size_p)
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{
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if (orientation == CLUTTER_ORIENTATION_HORIZONTAL)
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clutter_actor_get_preferred_width (actor, for_size, min_size_p, natural_size_p);
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else
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clutter_actor_get_preferred_height (actor, for_size, min_size_p, natural_size_p);
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}
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/* Handle the request in the orientation of the box (i.e. width request of horizontal box) */
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static void
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get_preferred_size_for_orientation (ClutterBoxLayout *self,
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ClutterActor *container,
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gfloat for_size,
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gfloat *min_size_p,
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gfloat *natural_size_p)
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{
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ClutterBoxLayoutPrivate *priv =
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clutter_box_layout_get_instance_private (self);
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ClutterActorIter iter;
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ClutterActor *child;
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gint n_children = 0;
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gfloat minimum, natural;
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float largest_min_size, largest_nat_size;
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minimum = natural = 0;
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largest_min_size = largest_nat_size = 0;
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clutter_actor_iter_init (&iter, container);
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while (clutter_actor_iter_next (&iter, &child))
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{
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gfloat child_min = 0, child_nat = 0;
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if (!clutter_actor_is_visible (child))
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continue;
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n_children++;
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get_child_size (child, priv->orientation,
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for_size, &child_min, &child_nat);
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if (priv->is_homogeneous)
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{
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largest_min_size = MAX (largest_min_size, child_min);
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largest_nat_size = MAX (largest_nat_size, child_nat);
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}
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else
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{
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minimum += child_min;
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natural += child_nat;
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}
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}
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if (priv->is_homogeneous)
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{
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minimum = largest_min_size * n_children;
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natural = largest_nat_size * n_children;
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}
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if (n_children > 1)
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{
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minimum += priv->spacing * (n_children - 1);
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natural += priv->spacing * (n_children - 1);
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}
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if (min_size_p)
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*min_size_p = minimum;
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if (natural_size_p)
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*natural_size_p = natural;
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}
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static void
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get_base_size_for_opposite_orientation (ClutterBoxLayout *self,
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ClutterActor *container,
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gfloat *min_size_p,
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gfloat *natural_size_p)
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{
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ClutterBoxLayoutPrivate *priv =
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clutter_box_layout_get_instance_private (self);
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ClutterActorIter iter;
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ClutterActor *child;
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gint n_children = 0;
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gfloat minimum, natural;
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ClutterOrientation opposite_orientation =
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priv->orientation == CLUTTER_ORIENTATION_HORIZONTAL
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? CLUTTER_ORIENTATION_VERTICAL
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: CLUTTER_ORIENTATION_HORIZONTAL;
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minimum = natural = 0;
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clutter_actor_iter_init (&iter, container);
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while (clutter_actor_iter_next (&iter, &child))
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{
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gfloat child_min = 0, child_nat = 0;
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if (!clutter_actor_is_visible (child))
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continue;
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n_children++;
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get_child_size (child, opposite_orientation, -1, &child_min, &child_nat);
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minimum = MAX (minimum, child_min);
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natural = MAX (natural, child_nat);
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}
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if (min_size_p)
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*min_size_p = minimum;
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if (natural_size_p)
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*natural_size_p = natural;
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}
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/* Handle the request in the opposite orientation of the box
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* (i.e. height request of horizontal box)
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*
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* This operation requires a virtual allocation in the natural
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* orientation of the box, after that each element must be asked
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* for the size-for-virtually-allocated-size and the maximums of
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* each child sample will be reported as the overall
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* "size-for-size-in-opposite-orientation"
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*/
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static void
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get_preferred_size_for_opposite_orientation (ClutterBoxLayout *self,
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ClutterActor *container,
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gfloat for_size,
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gfloat *min_size_p,
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gfloat *natural_size_p)
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{
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ClutterLayoutManager *layout = CLUTTER_LAYOUT_MANAGER (self);
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ClutterBoxLayoutPrivate *priv =
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clutter_box_layout_get_instance_private (self);
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ClutterActor *child;
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ClutterActorIter iter;
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gint nvis_children = 0, n_extra_widgets = 0;
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gint nexpand_children = 0, i;
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RequestedSize *sizes;
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gfloat minimum, natural, size, extra = 0;
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ClutterOrientation opposite_orientation =
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priv->orientation == CLUTTER_ORIENTATION_HORIZONTAL
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? CLUTTER_ORIENTATION_VERTICAL
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: CLUTTER_ORIENTATION_HORIZONTAL;
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minimum = natural = 0;
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count_expand_children (layout, container, &nvis_children, &nexpand_children);
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if (nvis_children < 1)
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{
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if (min_size_p)
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*min_size_p = 0;
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if (natural_size_p)
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*natural_size_p = 0;
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return;
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}
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/* First collect the requested sizes in the natural orientation of the box */
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sizes = g_newa (RequestedSize, nvis_children);
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size = for_size;
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i = 0;
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clutter_actor_iter_init (&iter, container);
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while (clutter_actor_iter_next (&iter, &child))
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{
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if (!clutter_actor_is_visible (child))
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continue;
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get_child_size (child, priv->orientation, -1,
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&sizes[i].minimum_size,
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&sizes[i].natural_size);
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size -= sizes[i].minimum_size;
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i++;
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}
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if (priv->is_homogeneous)
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{
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size = for_size - (nvis_children - 1) * priv->spacing;
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extra = size / nvis_children;
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n_extra_widgets = ((gint)size) % nvis_children;
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}
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else
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{
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size -= (nvis_children - 1) * priv->spacing;
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/* Bring children up to size first */
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if (isnormal (size) || size == 0)
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{
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size = distribute_natural_allocation (MAX (0, size),
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nvis_children,
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sizes);
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}
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else
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{
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g_critical ("Actor %s (%p) received the invalid "
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"value %f as minimum/natural size\n",
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G_OBJECT_TYPE_NAME (container), container, size);
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size = 0;
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}
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/* Calculate space which hasn't distributed yet,
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* and is available for expanding children.
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*/
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if (nexpand_children > 0)
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{
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extra = size / nexpand_children;
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n_extra_widgets = ((gint)size) % nexpand_children;
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}
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}
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/* Distribute expand space to children */
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i = 0;
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clutter_actor_iter_init (&iter, container);
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while (clutter_actor_iter_next (&iter, &child))
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{
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/* If widget is not visible, skip it. */
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if (!clutter_actor_is_visible (child))
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continue;
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if (priv->is_homogeneous)
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{
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sizes[i].minimum_size = extra;
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if (n_extra_widgets > 0)
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{
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sizes[i].minimum_size++;
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n_extra_widgets--;
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}
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}
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else
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{
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if (clutter_actor_needs_expand (child, priv->orientation))
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{
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sizes[i].minimum_size += extra;
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if (n_extra_widgets > 0)
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{
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sizes[i].minimum_size++;
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n_extra_widgets--;
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}
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}
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}
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i++;
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}
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/* Virtual allocation finished, now we can finally ask for the right size-for-size */
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i = 0;
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clutter_actor_iter_init (&iter, container);
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while (clutter_actor_iter_next (&iter, &child))
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{
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gfloat child_min = 0, child_nat = 0;
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if (!clutter_actor_is_visible (child))
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continue;
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get_child_size (child, opposite_orientation,
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sizes[i].minimum_size,
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&child_min, &child_nat);
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minimum = MAX (minimum, child_min);
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natural = MAX (natural, child_nat);
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i++;
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}
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if (min_size_p)
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*min_size_p = minimum;
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if (natural_size_p)
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*natural_size_p = natural;
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}
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static void
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allocate_box_child (ClutterBoxLayout *self,
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ClutterActor *container,
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ClutterActor *child,
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ClutterActorBox *child_box)
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{
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CLUTTER_NOTE (LAYOUT, "Allocation for %s { %.2f, %.2f, %.2f, %.2f }",
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_clutter_actor_get_debug_name (child),
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child_box->x1, child_box->y1,
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child_box->x2 - child_box->x1,
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child_box->y2 - child_box->y1);
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clutter_actor_allocate (child, child_box);
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}
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static void
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clutter_box_layout_get_preferred_width (ClutterLayoutManager *layout,
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ClutterActor *container,
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gfloat for_height,
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gfloat *min_width_p,
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gfloat *natural_width_p)
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{
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ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (layout);
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ClutterBoxLayoutPrivate *priv =
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clutter_box_layout_get_instance_private (self);
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if (priv->orientation == CLUTTER_ORIENTATION_VERTICAL)
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{
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if (for_height < 0)
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get_base_size_for_opposite_orientation (self, CLUTTER_ACTOR (container),
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min_width_p, natural_width_p);
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else
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get_preferred_size_for_opposite_orientation (self, CLUTTER_ACTOR (container), for_height,
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min_width_p, natural_width_p);
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}
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else
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get_preferred_size_for_orientation (self, CLUTTER_ACTOR (container), for_height,
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min_width_p, natural_width_p);
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}
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static void
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clutter_box_layout_get_preferred_height (ClutterLayoutManager *layout,
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ClutterActor *container,
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gfloat for_width,
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gfloat *min_height_p,
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gfloat *natural_height_p)
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{
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ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (layout);
|
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ClutterBoxLayoutPrivate *priv =
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clutter_box_layout_get_instance_private (self);
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if (priv->orientation == CLUTTER_ORIENTATION_HORIZONTAL)
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{
|
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if (for_width < 0)
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get_base_size_for_opposite_orientation (self, CLUTTER_ACTOR (container),
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min_height_p, natural_height_p);
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else
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get_preferred_size_for_opposite_orientation (self, CLUTTER_ACTOR (container), for_width,
|
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min_height_p, natural_height_p);
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}
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else
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get_preferred_size_for_orientation (self, CLUTTER_ACTOR (container), for_width,
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min_height_p, natural_height_p);
|
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}
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|
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static void
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count_expand_children (ClutterLayoutManager *layout,
|
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ClutterActor *container,
|
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gint *visible_children,
|
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gint *expand_children)
|
|
{
|
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ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (layout);
|
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ClutterBoxLayoutPrivate *priv =
|
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clutter_box_layout_get_instance_private (self);
|
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ClutterActor *child;
|
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ClutterActorIter iter;
|
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*visible_children = *expand_children = 0;
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clutter_actor_iter_init (&iter, container);
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while (clutter_actor_iter_next (&iter, &child))
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{
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if (clutter_actor_is_visible (child))
|
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{
|
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*visible_children += 1;
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|
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if (clutter_actor_needs_expand (child, priv->orientation))
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*expand_children += 1;
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}
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}
|
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}
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|
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/* Pulled from gtksizerequest.c from Gtk+ */
|
|
static gint
|
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compare_gap (gconstpointer p1,
|
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gconstpointer p2,
|
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gpointer data)
|
|
{
|
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RequestedSize *sizes = data;
|
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const guint *c1 = p1;
|
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const guint *c2 = p2;
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|
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const int d1 = (int) MAX (sizes[*c1].natural_size -
|
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sizes[*c1].minimum_size,
|
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0);
|
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const int d2 = (int) MAX (sizes[*c2].natural_size -
|
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sizes[*c2].minimum_size,
|
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0);
|
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|
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gint delta = (d2 - d1);
|
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|
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if (0 == delta)
|
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delta = (*c2 - *c1);
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|
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return delta;
|
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}
|
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|
|
/*
|
|
* distribute_natural_allocation:
|
|
* @extra_space: Extra space to redistribute among children after subtracting
|
|
* minimum sizes and any child padding from the overall allocation
|
|
* @n_requested_sizes: Number of requests to fit into the allocation
|
|
* @sizes: An array of structs with a client pointer and a minimum/natural size
|
|
* in the orientation of the allocation.
|
|
*
|
|
* Distributes @extra_space to child @sizes by bringing smaller
|
|
* children up to natural size first.
|
|
*
|
|
* The remaining space will be added to the @minimum_size member of the
|
|
* RequestedSize struct. If all sizes reach their natural size then
|
|
* the remaining space is returned.
|
|
*
|
|
* Returns: The remainder of @extra_space after redistributing space
|
|
* to @sizes.
|
|
*
|
|
* Pulled from gtksizerequest.c from Gtk+
|
|
*/
|
|
static float
|
|
distribute_natural_allocation (float extra_space,
|
|
unsigned int n_requested_sizes,
|
|
RequestedSize *sizes)
|
|
{
|
|
unsigned int *spreading;
|
|
int i;
|
|
|
|
g_return_val_if_fail (isnormal (extra_space) || extra_space == 0, 0);
|
|
g_return_val_if_fail (extra_space >= 0, 0);
|
|
|
|
spreading = g_newa (unsigned int, n_requested_sizes);
|
|
|
|
for (i = 0; i < n_requested_sizes; i++)
|
|
spreading[i] = i;
|
|
|
|
/* Distribute the container's extra space c_gap. We want to assign
|
|
* this space such that the sum of extra space assigned to children
|
|
* (c^i_gap) is equal to c_cap. The case that there's not enough
|
|
* space for all children to take their natural size needs some
|
|
* attention. The goals we want to achieve are:
|
|
*
|
|
* a) Maximize number of children taking their natural size.
|
|
* b) The allocated size of children should be a continuous
|
|
* function of c_gap. That is, increasing the container size by
|
|
* one pixel should never make drastic changes in the distribution.
|
|
* c) If child i takes its natural size and child j doesn't,
|
|
* child j should have received at least as much gap as child i.
|
|
*
|
|
* The following code distributes the additional space by following
|
|
* these rules.
|
|
*/
|
|
|
|
/* Sort descending by gap and position. */
|
|
g_sort_array (spreading,
|
|
n_requested_sizes, sizeof (unsigned int),
|
|
compare_gap, sizes);
|
|
|
|
/* Distribute available space.
|
|
* This master piece of a loop was conceived by Behdad Esfahbod.
|
|
*/
|
|
for (i = n_requested_sizes - 1; extra_space > 0.0 && i >= 0; --i)
|
|
{
|
|
/* Divide remaining space by number of remaining children.
|
|
* Sort order and reducing remaining space by assigned space
|
|
* ensures that space is distributed equally.
|
|
*/
|
|
float glue = (extra_space + i) / (i + 1.0f);
|
|
float gap =
|
|
sizes[(spreading[i])].natural_size - sizes[(spreading[i])].minimum_size;
|
|
|
|
float extra = MIN (glue, gap);
|
|
|
|
sizes[spreading[i]].minimum_size += extra;
|
|
|
|
extra_space -= extra;
|
|
}
|
|
|
|
return extra_space;
|
|
}
|
|
|
|
/* Pulled from gtkbox.c from Gtk+ */
|
|
|
|
static void
|
|
clutter_box_layout_allocate (ClutterLayoutManager *layout,
|
|
ClutterActor *container,
|
|
const ClutterActorBox *box)
|
|
{
|
|
ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (layout);
|
|
ClutterBoxLayoutPrivate *priv =
|
|
clutter_box_layout_get_instance_private (self);
|
|
ClutterActor *actor, *child;
|
|
gint nvis_children;
|
|
gint nexpand_children;
|
|
gboolean is_rtl;
|
|
ClutterActorIter iter;
|
|
|
|
ClutterActorBox child_allocation;
|
|
RequestedSize *sizes;
|
|
|
|
gint size;
|
|
gint extra;
|
|
gint n_extra_widgets = 0; /* Number of widgets that receive 1 extra px */
|
|
gint x = 0, y = 0, i;
|
|
gfloat child_size;
|
|
|
|
count_expand_children (layout, container, &nvis_children, &nexpand_children);
|
|
|
|
CLUTTER_NOTE (LAYOUT, "BoxLayout for %s: visible=%d, expand=%d",
|
|
_clutter_actor_get_debug_name (CLUTTER_ACTOR (container)),
|
|
nvis_children,
|
|
nexpand_children);
|
|
|
|
/* If there is no visible child, simply return. */
|
|
if (nvis_children <= 0)
|
|
return;
|
|
|
|
sizes = g_newa (RequestedSize, nvis_children);
|
|
|
|
if (priv->orientation == CLUTTER_ORIENTATION_VERTICAL)
|
|
size = (int) (box->y2 - box->y1 - (nvis_children - 1) * priv->spacing);
|
|
else
|
|
size = (int) (box->x2 - box->x1 - (nvis_children - 1) * priv->spacing);
|
|
|
|
actor = CLUTTER_ACTOR (container);
|
|
|
|
/* Retrieve desired size for visible children. */
|
|
i = 0;
|
|
clutter_actor_iter_init (&iter, actor);
|
|
while (clutter_actor_iter_next (&iter, &child))
|
|
{
|
|
if (!clutter_actor_is_visible (child))
|
|
continue;
|
|
|
|
if (priv->orientation == CLUTTER_ORIENTATION_VERTICAL)
|
|
clutter_actor_get_preferred_height (child,
|
|
box->x2 - box->x1,
|
|
&sizes[i].minimum_size,
|
|
&sizes[i].natural_size);
|
|
else
|
|
clutter_actor_get_preferred_width (child,
|
|
box->y2 - box->y1,
|
|
&sizes[i].minimum_size,
|
|
&sizes[i].natural_size);
|
|
|
|
|
|
/* Assert the api is working properly */
|
|
if (sizes[i].minimum_size < 0)
|
|
g_error ("ClutterBoxLayout child %s minimum %s: %f < 0 for %s %f",
|
|
_clutter_actor_get_debug_name (child),
|
|
priv->orientation == CLUTTER_ORIENTATION_VERTICAL
|
|
? "height"
|
|
: "width",
|
|
sizes[i].minimum_size,
|
|
priv->orientation == CLUTTER_ORIENTATION_VERTICAL
|
|
? "width"
|
|
: "height",
|
|
priv->orientation == CLUTTER_ORIENTATION_VERTICAL
|
|
? box->x2 - box->x1
|
|
: box->y2 - box->y1);
|
|
|
|
if (sizes[i].natural_size < sizes[i].minimum_size)
|
|
g_error ("ClutterBoxLayout child %s natural %s: %f < minimum %f for %s %f",
|
|
_clutter_actor_get_debug_name (child),
|
|
priv->orientation == CLUTTER_ORIENTATION_VERTICAL
|
|
? "height"
|
|
: "width",
|
|
sizes[i].natural_size,
|
|
sizes[i].minimum_size,
|
|
priv->orientation == CLUTTER_ORIENTATION_VERTICAL
|
|
? "width"
|
|
: "height",
|
|
priv->orientation == CLUTTER_ORIENTATION_VERTICAL
|
|
? box->x2 - box->x1
|
|
: box->y2 - box->y1);
|
|
|
|
size -= (int) sizes[i].minimum_size;
|
|
|
|
sizes[i].actor = child;
|
|
|
|
i += 1;
|
|
}
|
|
|
|
if (priv->is_homogeneous)
|
|
{
|
|
/* If were homogeneous we still need to run the above loop to get the
|
|
* minimum sizes for children that are not going to fill
|
|
*/
|
|
if (priv->orientation == CLUTTER_ORIENTATION_VERTICAL)
|
|
size = (int) (box->y2 - box->y1 - (nvis_children - 1) * priv->spacing);
|
|
else
|
|
size = (int) (box->x2 - box->x1 - (nvis_children - 1) * priv->spacing);
|
|
|
|
extra = size / nvis_children;
|
|
n_extra_widgets = size % nvis_children;
|
|
}
|
|
else
|
|
{
|
|
/* Bring children up to size first */
|
|
size = (gint) distribute_natural_allocation (MAX (0, (float) size),
|
|
nvis_children,
|
|
sizes);
|
|
|
|
/* Calculate space which hasn't distributed yet,
|
|
* and is available for expanding children.
|
|
*/
|
|
if (nexpand_children > 0)
|
|
{
|
|
extra = size / nexpand_children;
|
|
n_extra_widgets = size % nexpand_children;
|
|
}
|
|
else
|
|
extra = 0;
|
|
}
|
|
|
|
if (priv->orientation == CLUTTER_ORIENTATION_HORIZONTAL)
|
|
{
|
|
ClutterTextDirection text_dir;
|
|
|
|
text_dir = clutter_actor_get_text_direction (CLUTTER_ACTOR (container));
|
|
is_rtl = (text_dir == CLUTTER_TEXT_DIRECTION_RTL) ? TRUE : FALSE;
|
|
}
|
|
else
|
|
is_rtl = FALSE;
|
|
|
|
/* Allocate child positions. */
|
|
if (priv->orientation == CLUTTER_ORIENTATION_VERTICAL)
|
|
{
|
|
child_allocation.x1 = box->x1;
|
|
child_allocation.x2 = MAX (1.0f, box->x2);
|
|
y = (int) box->y1;
|
|
}
|
|
else
|
|
{
|
|
child_allocation.y1 = box->y1;
|
|
child_allocation.y2 = MAX (1.0f, box->y2);
|
|
x = (int) box->x1;
|
|
}
|
|
|
|
i = 0;
|
|
clutter_actor_iter_init (&iter, actor);
|
|
while (clutter_actor_iter_next (&iter, &child))
|
|
{
|
|
/* If widget is not visible, skip it. */
|
|
if (!clutter_actor_is_visible (child))
|
|
continue;
|
|
|
|
/* Assign the child's size. */
|
|
if (priv->is_homogeneous)
|
|
{
|
|
child_size = extra;
|
|
|
|
if (n_extra_widgets > 0)
|
|
{
|
|
child_size++;
|
|
n_extra_widgets--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
child_size = sizes[i].minimum_size;
|
|
|
|
if (clutter_actor_needs_expand (child, priv->orientation))
|
|
{
|
|
child_size += extra;
|
|
|
|
if (n_extra_widgets > 0)
|
|
{
|
|
child_size++;
|
|
n_extra_widgets--;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Assign the child's position. */
|
|
if (priv->orientation == CLUTTER_ORIENTATION_VERTICAL)
|
|
{
|
|
if (clutter_actor_needs_expand (child, priv->orientation))
|
|
{
|
|
child_allocation.y1 = y;
|
|
child_allocation.y2 = child_allocation.y1 + MAX (1.0f, child_size);
|
|
}
|
|
else
|
|
{
|
|
child_allocation.y1 = y + (child_size - sizes[i].minimum_size) / 2;
|
|
child_allocation.y2 = child_allocation.y1 + sizes[i].minimum_size;
|
|
}
|
|
|
|
y += (int) (child_size + priv->spacing);
|
|
}
|
|
else /* CLUTTER_ORIENTATION_HORIZONTAL */
|
|
{
|
|
if (clutter_actor_needs_expand (child, priv->orientation))
|
|
{
|
|
child_allocation.x1 = x;
|
|
child_allocation.x2 = child_allocation.x1 + MAX (1.0f, child_size);
|
|
}
|
|
else
|
|
{
|
|
child_allocation.x1 = x + (child_size - sizes[i].minimum_size) / 2;
|
|
child_allocation.x2 = child_allocation.x1 + sizes[i].minimum_size;
|
|
}
|
|
|
|
x += (int) (child_size + priv->spacing);
|
|
|
|
if (is_rtl)
|
|
{
|
|
gfloat width = child_allocation.x2 - child_allocation.x1;
|
|
|
|
child_allocation.x2 = box->x1 + (box->x2 - child_allocation.x1);
|
|
child_allocation.x1 = child_allocation.x2 - width;
|
|
}
|
|
|
|
}
|
|
|
|
allocate_box_child (CLUTTER_BOX_LAYOUT (layout),
|
|
container,
|
|
child,
|
|
&child_allocation);
|
|
|
|
i += 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
clutter_box_layout_set_property (GObject *gobject,
|
|
guint prop_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (gobject);
|
|
|
|
switch (prop_id)
|
|
{
|
|
case PROP_ORIENTATION:
|
|
clutter_box_layout_set_orientation (self, g_value_get_enum (value));
|
|
break;
|
|
|
|
case PROP_HOMOGENEOUS:
|
|
clutter_box_layout_set_homogeneous (self, g_value_get_boolean (value));
|
|
break;
|
|
|
|
case PROP_SPACING:
|
|
clutter_box_layout_set_spacing (self, g_value_get_uint (value));
|
|
break;
|
|
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
clutter_box_layout_get_property (GObject *gobject,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
ClutterBoxLayout *self = CLUTTER_BOX_LAYOUT (gobject);
|
|
ClutterBoxLayoutPrivate *priv =
|
|
clutter_box_layout_get_instance_private (self);
|
|
|
|
switch (prop_id)
|
|
{
|
|
case PROP_ORIENTATION:
|
|
g_value_set_enum (value, priv->orientation);
|
|
break;
|
|
|
|
case PROP_HOMOGENEOUS:
|
|
g_value_set_boolean (value, priv->is_homogeneous);
|
|
break;
|
|
|
|
case PROP_SPACING:
|
|
g_value_set_uint (value, priv->spacing);
|
|
break;
|
|
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
clutter_box_layout_class_init (ClutterBoxLayoutClass *klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
ClutterLayoutManagerClass *layout_class;
|
|
|
|
layout_class = CLUTTER_LAYOUT_MANAGER_CLASS (klass);
|
|
|
|
layout_class->get_preferred_width = clutter_box_layout_get_preferred_width;
|
|
layout_class->get_preferred_height = clutter_box_layout_get_preferred_height;
|
|
layout_class->allocate = clutter_box_layout_allocate;
|
|
layout_class->set_container = clutter_box_layout_set_container;
|
|
|
|
/**
|
|
* ClutterBoxLayout:orientation:
|
|
*
|
|
* The orientation of the #ClutterBoxLayout, either horizontal
|
|
* or vertical
|
|
*/
|
|
obj_props[PROP_ORIENTATION] =
|
|
g_param_spec_enum ("orientation", NULL, NULL,
|
|
CLUTTER_TYPE_ORIENTATION,
|
|
CLUTTER_ORIENTATION_HORIZONTAL,
|
|
G_PARAM_READWRITE |
|
|
G_PARAM_STATIC_STRINGS);
|
|
|
|
/**
|
|
* ClutterBoxLayout:homogeneous:
|
|
*
|
|
* Whether the #ClutterBoxLayout should arrange its children
|
|
* homogeneously, i.e. all children get the same size
|
|
*/
|
|
obj_props[PROP_HOMOGENEOUS] =
|
|
g_param_spec_boolean ("homogeneous", NULL, NULL,
|
|
FALSE,
|
|
G_PARAM_READWRITE |
|
|
G_PARAM_STATIC_STRINGS);
|
|
|
|
/**
|
|
* ClutterBoxLayout:spacing:
|
|
*
|
|
* The spacing between children of the #ClutterBoxLayout, in pixels
|
|
*/
|
|
obj_props[PROP_SPACING] =
|
|
g_param_spec_uint ("spacing", NULL, NULL,
|
|
0, G_MAXUINT, 0,
|
|
G_PARAM_READWRITE |
|
|
G_PARAM_STATIC_STRINGS);
|
|
|
|
gobject_class->set_property = clutter_box_layout_set_property;
|
|
gobject_class->get_property = clutter_box_layout_get_property;
|
|
g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
|
|
}
|
|
|
|
static void
|
|
clutter_box_layout_init (ClutterBoxLayout *self)
|
|
{
|
|
ClutterBoxLayoutPrivate *priv =
|
|
clutter_box_layout_get_instance_private (self);
|
|
|
|
priv->orientation = CLUTTER_ORIENTATION_HORIZONTAL;
|
|
priv->is_homogeneous = FALSE;
|
|
priv->spacing = 0;
|
|
|
|
priv->easing_mode = CLUTTER_EASE_OUT_CUBIC;
|
|
priv->easing_duration = 500;
|
|
}
|
|
|
|
/**
|
|
* clutter_box_layout_new:
|
|
*
|
|
* Creates a new #ClutterBoxLayout layout manager
|
|
*
|
|
* Return value: the newly created #ClutterBoxLayout
|
|
*/
|
|
ClutterLayoutManager *
|
|
clutter_box_layout_new (void)
|
|
{
|
|
return g_object_new (CLUTTER_TYPE_BOX_LAYOUT, NULL);
|
|
}
|
|
|
|
/**
|
|
* clutter_box_layout_set_spacing:
|
|
* @layout: a #ClutterBoxLayout
|
|
* @spacing: the spacing between children of the layout, in pixels
|
|
*
|
|
* Sets the spacing between children of @layout
|
|
*/
|
|
void
|
|
clutter_box_layout_set_spacing (ClutterBoxLayout *layout,
|
|
guint spacing)
|
|
{
|
|
ClutterBoxLayoutPrivate *priv;
|
|
|
|
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
|
|
|
|
priv = clutter_box_layout_get_instance_private (layout);
|
|
if (priv->spacing != spacing)
|
|
{
|
|
ClutterLayoutManager *manager;
|
|
|
|
priv->spacing = spacing;
|
|
|
|
manager = CLUTTER_LAYOUT_MANAGER (layout);
|
|
|
|
clutter_layout_manager_layout_changed (manager);
|
|
|
|
g_object_notify (G_OBJECT (layout), "spacing");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* clutter_box_layout_get_spacing:
|
|
* @layout: a #ClutterBoxLayout
|
|
*
|
|
* Retrieves the spacing set using [method@Clutter.BoxLayout.set_spacing]
|
|
*
|
|
* Return value: the spacing between children of the #ClutterBoxLayout
|
|
*/
|
|
guint
|
|
clutter_box_layout_get_spacing (ClutterBoxLayout *layout)
|
|
{
|
|
ClutterBoxLayoutPrivate *priv;
|
|
|
|
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), 0);
|
|
|
|
priv = clutter_box_layout_get_instance_private (layout);
|
|
return priv->spacing;
|
|
}
|
|
|
|
/**
|
|
* clutter_box_layout_set_orientation:
|
|
* @layout: a #ClutterBoxLayout
|
|
* @orientation: the orientation of the #ClutterBoxLayout
|
|
*
|
|
* Sets the orientation of the #ClutterBoxLayout layout manager.
|
|
*/
|
|
void
|
|
clutter_box_layout_set_orientation (ClutterBoxLayout *layout,
|
|
ClutterOrientation orientation)
|
|
{
|
|
ClutterLayoutManager *manager;
|
|
ClutterBoxLayoutPrivate *priv;
|
|
|
|
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
|
|
|
|
priv = clutter_box_layout_get_instance_private (layout);
|
|
if (priv->orientation == orientation)
|
|
return;
|
|
|
|
priv->orientation = orientation;
|
|
|
|
manager = CLUTTER_LAYOUT_MANAGER (layout);
|
|
|
|
clutter_layout_manager_layout_changed (manager);
|
|
|
|
g_object_notify_by_pspec (G_OBJECT (layout), obj_props[PROP_ORIENTATION]);
|
|
}
|
|
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/**
|
|
* clutter_box_layout_get_orientation:
|
|
* @layout: a #ClutterBoxLayout
|
|
*
|
|
* Retrieves the orientation of the @layout.
|
|
*
|
|
* Return value: the orientation of the layout
|
|
*/
|
|
ClutterOrientation
|
|
clutter_box_layout_get_orientation (ClutterBoxLayout *layout)
|
|
{
|
|
ClutterBoxLayoutPrivate *priv;
|
|
|
|
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout),
|
|
CLUTTER_ORIENTATION_HORIZONTAL);
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|
|
|
priv = clutter_box_layout_get_instance_private (layout);
|
|
return priv->orientation;
|
|
}
|
|
|
|
/**
|
|
* clutter_box_layout_set_homogeneous:
|
|
* @layout: a #ClutterBoxLayout
|
|
* @homogeneous: %TRUE if the layout should be homogeneous
|
|
*
|
|
* Sets whether the size of @layout children should be
|
|
* homogeneous
|
|
*/
|
|
void
|
|
clutter_box_layout_set_homogeneous (ClutterBoxLayout *layout,
|
|
gboolean homogeneous)
|
|
{
|
|
ClutterBoxLayoutPrivate *priv;
|
|
|
|
g_return_if_fail (CLUTTER_IS_BOX_LAYOUT (layout));
|
|
|
|
priv = clutter_box_layout_get_instance_private (layout);
|
|
if (priv->is_homogeneous != homogeneous)
|
|
{
|
|
ClutterLayoutManager *manager;
|
|
|
|
priv->is_homogeneous = !!homogeneous;
|
|
|
|
manager = CLUTTER_LAYOUT_MANAGER (layout);
|
|
|
|
clutter_layout_manager_layout_changed (manager);
|
|
|
|
g_object_notify (G_OBJECT (layout), "homogeneous");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* clutter_box_layout_get_homogeneous:
|
|
* @layout: a #ClutterBoxLayout
|
|
*
|
|
* Retrieves if the children sizes are allocated homogeneously.
|
|
*
|
|
* Return value: %TRUE if the #ClutterBoxLayout is arranging its children
|
|
* homogeneously, and %FALSE otherwise
|
|
*/
|
|
gboolean
|
|
clutter_box_layout_get_homogeneous (ClutterBoxLayout *layout)
|
|
{
|
|
ClutterBoxLayoutPrivate *priv;
|
|
|
|
g_return_val_if_fail (CLUTTER_IS_BOX_LAYOUT (layout), FALSE);
|
|
|
|
priv = clutter_box_layout_get_instance_private (layout);
|
|
return priv->is_homogeneous;
|
|
}
|
|
|