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#include "config.h"
#include "gtklayoutchild.h"
#include "gtklayoutmanager.h"
#include "gtkprivate.h"
/**
* SECTION:gtklayoutchild
* @Title: GtkLayoutChild
* @Short_description: An object containing layout properties
*
* #GtkLayoutChild is the base class for objects that are meant to hold
* layout properties. If a #GtkLayoutManager has per-child properties,
* like their packing type, or the horizontal and vertical span, or the
* icon name, then the layout manager should use a #GtkLayoutChild
* implementation to store those properties.
*
* A #GtkLayoutChild instance is only ever valid while a widget is part
* of a layout.
*/
typedef struct {
GtkLayoutManager *manager;
GtkWidget *widget;
} GtkLayoutChildPrivate;
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GtkLayoutChild, gtk_layout_child, G_TYPE_OBJECT)
enum {
PROP_LAYOUT_MANAGER = 1,
PROP_CHILD_WIDGET,
N_PROPS
};
static GParamSpec *layout_child_properties[N_PROPS];
static void
gtk_layout_child_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkLayoutChild *layout_child = GTK_LAYOUT_CHILD (gobject);
GtkLayoutChildPrivate *priv = gtk_layout_child_get_instance_private (layout_child);
switch (prop_id)
{
case PROP_LAYOUT_MANAGER:
priv->manager = g_value_get_object (value);
break;
case PROP_CHILD_WIDGET:
priv->widget = g_value_get_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
gtk_layout_child_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkLayoutChild *layout_child = GTK_LAYOUT_CHILD (gobject);
GtkLayoutChildPrivate *priv = gtk_layout_child_get_instance_private (layout_child);
switch (prop_id)
{
case PROP_LAYOUT_MANAGER:
g_value_set_object (value, priv->manager);
break;
case PROP_CHILD_WIDGET:
g_value_set_object (value, priv->widget);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
}
}
static void
gtk_layout_child_constructed (GObject *gobject)
{
GtkLayoutChild *layout_child = GTK_LAYOUT_CHILD (gobject);
GtkLayoutChildPrivate *priv = gtk_layout_child_get_instance_private (layout_child);
G_OBJECT_CLASS (gtk_layout_child_parent_class)->constructed (gobject);
if (priv->manager == NULL)
{
g_critical ("The layout child of type %s does not have "
"the GtkLayoutChild:layout-manager property set",
G_OBJECT_TYPE_NAME (gobject));
return;
}
if (priv->widget == NULL)
{
g_critical ("The layout child of type %s does not have "
"the GtkLayoutChild:child-widget property set",
G_OBJECT_TYPE_NAME (gobject));
return;
}
}
static void
gtk_layout_child_class_init (GtkLayoutChildClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = gtk_layout_child_set_property;
gobject_class->get_property = gtk_layout_child_get_property;
gobject_class->constructed = gtk_layout_child_constructed;
/**
* GtkLayoutChild:layout-manager:
*
* The layout manager that created the #GtkLayoutChild instance.
*/
layout_child_properties[PROP_LAYOUT_MANAGER] =
g_param_spec_object ("layout-manager",
"Layout Manager",
"The layout manager that created this object",
GTK_TYPE_LAYOUT_MANAGER,
GTK_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY);
/**
* GtkLayoutChild:child-widget:
*
* The widget that is associated to the #GtkLayoutChild instance.
*/
layout_child_properties[PROP_CHILD_WIDGET] =
g_param_spec_object ("child-widget",
"Child Widget",
"The child widget that is associated to this object",
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_properties (gobject_class, N_PROPS, layout_child_properties);
}
static void
gtk_layout_child_init (GtkLayoutChild *self)
{
}
/**
* gtk_layout_child_get_layout_manager:
* @layout_child: a #GtkLayoutChild
*
* Retrieves the #GtkLayoutManager instance that created the
* given @layout_child.
*
* Returns: (transfer none): a #GtkLayoutManager
*/
GtkLayoutManager *
gtk_layout_child_get_layout_manager (GtkLayoutChild *layout_child)
{
GtkLayoutChildPrivate *priv = gtk_layout_child_get_instance_private (layout_child);
g_return_val_if_fail (GTK_IS_LAYOUT_CHILD (layout_child), NULL);
return priv->manager;
}
/**
* gtk_layout_child_get_child_widget:
* @layout_child: a #GtkLayoutChild
*
* Retrieves the #GtkWidget associated to the given @layout_child.
*
* Returns: (transfer none): a #GtkWidget
*/
GtkWidget *
gtk_layout_child_get_child_widget (GtkLayoutChild *layout_child)
{
GtkLayoutChildPrivate *priv = gtk_layout_child_get_instance_private (layout_child);
g_return_val_if_fail (GTK_IS_LAYOUT_CHILD (layout_child), NULL);
return priv->widget;
}
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