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gtk2/gtk/gtksizegroup.c

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/* GTK - The GIMP Toolkit
* gtksizegroup.c:
* Copyright (C) 2001 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include "gtkbuildable.h"
#include "gtkcontainer.h"
#include "gtkintl.h"
#include "gtktypebuiltins.h"
#include "gtkprivate.h"
#include "gtksizegroup-private.h"
#include "gtkwidgetprivate.h"
#include "gtkcontainerprivate.h"
/**
* SECTION:gtksizegroup
* @Short_description: Grouping widgets so they request the same size
* @Title: GtkSizeGroup
*
* #GtkSizeGroup provides a mechanism for grouping a number of widgets
* together so they all request the same amount of space. This is
* typically useful when you want a column of widgets to have the same
* size, but you can't use a #GtkGrid widget.
*
* In detail, the size requested for each widget in a #GtkSizeGroup is
* the maximum of the sizes that would have been requested for each
* widget in the size group if they were not in the size group. The mode
* of the size group (see gtk_size_group_set_mode()) determines whether
* this applies to the horizontal size, the vertical size, or both sizes.
*
* Note that size groups only affect the amount of space requested, not
* the size that the widgets finally receive. If you want the widgets in
* a #GtkSizeGroup to actually be the same size, you need to pack them in
* such a way that they get the size they request and not more. For
* example, if you are packing your widgets into a table, you would not
* include the %GTK_FILL flag.
*
* #GtkSizeGroup objects are referenced by each widget in the size group,
* so once you have added all widgets to a #GtkSizeGroup, you can drop
* the initial reference to the size group with g_object_unref(). If the
* widgets in the size group are subsequently destroyed, then they will
* be removed from the size group and drop their references on the size
* group; when all widgets have been removed, the size group will be
* freed.
*
* Widgets can be part of multiple size groups; GTK+ will compute the
* horizontal size of a widget from the horizontal requisition of all
* widgets that can be reached from the widget by a chain of size groups
* of type %GTK_SIZE_GROUP_HORIZONTAL or %GTK_SIZE_GROUP_BOTH, and the
* vertical size from the vertical requisition of all widgets that can be
* reached from the widget by a chain of size groups of type
* %GTK_SIZE_GROUP_VERTICAL or %GTK_SIZE_GROUP_BOTH.
*
* Note that only non-contextual sizes of every widget are ever consulted
* by size groups (since size groups have no knowledge of what size a widget
* will be allocated in one dimension, it cannot derive how much height
* a widget will receive for a given width). When grouping widgets that
* trade height for width in mode %GTK_SIZE_GROUP_VERTICAL or %GTK_SIZE_GROUP_BOTH:
* the height for the minimum width will be the requested height for all
* widgets in the group. The same is of course true when horizontally grouping
* width for height widgets.
*
* Widgets that trade height-for-width should set a reasonably large minimum width
* by way of #GtkLabel:width-chars for instance. Widgets with static sizes as well
* as widgets that grow (such as ellipsizing text) need no such considerations.
*
* <refsect2 id="GtkSizeGroup-BUILDER-UI">
* <title>GtkSizeGroup as GtkBuildable</title>
* <para>
* Size groups can be specified in a UI definition by placing an
* &lt;object&gt; element with <literal>class="GtkSizeGroup"</literal>
* somewhere in the UI definition. The widgets that belong to the
* size group are specified by a &lt;widgets&gt; element that may
* contain multiple &lt;widget&gt; elements, one for each member
* of the size group. The name attribute gives the id of the widget.
*
* <example>
* <title>A UI definition fragment with GtkSizeGroup</title>
* <programlisting><![CDATA[
* <object class="GtkSizeGroup">
* <property name="mode">GTK_SIZE_GROUP_HORIZONTAL</property>
* <widgets>
* <widget name="radio1"/>
* <widget name="radio2"/>
* </widgets>
* </object>
* ]]></programlisting>
* </example>
* </para>
* </refsect2>
*/
struct _GtkSizeGroupPrivate
{
GtkRequisition minimum_req;
GtkRequisition natural_req;
GSList *widgets;
guint8 mode;
guint have_width : 1;
guint have_height : 1;
guint ignore_hidden : 1;
guint visited : 1;
};
enum {
PROP_0,
PROP_MODE,
PROP_IGNORE_HIDDEN
};
static void gtk_size_group_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_size_group_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void add_group_to_closure (GtkSizeGroup *group,
GtkSizeGroupMode mode,
GSList **groups,
GSList **widgets);
static void add_widget_to_closure (GtkWidget *widget,
GtkSizeGroupMode mode,
GSList **groups,
GSList **widgets);
/* GtkBuildable */
static void gtk_size_group_buildable_init (GtkBuildableIface *iface);
static gboolean gtk_size_group_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GMarkupParser *parser,
gpointer *data);
static void gtk_size_group_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
gpointer user_data);
static void
mark_group_unvisited (GtkSizeGroup *group)
{
group->priv->visited = FALSE;
}
static void
mark_widget_unvisited (GtkWidget *widget)
{
_gtk_widget_set_sizegroup_visited (widget, FALSE);
}
static void
add_group_to_closure (GtkSizeGroup *group,
GtkSizeGroupMode mode,
GSList **groups,
GSList **widgets)
{
GtkSizeGroupPrivate *priv = group->priv;
GSList *tmp_widgets;
*groups = g_slist_prepend (*groups, group);
priv->visited = TRUE;
tmp_widgets = priv->widgets;
while (tmp_widgets)
{
GtkWidget *tmp_widget = tmp_widgets->data;
if (!_gtk_widget_get_sizegroup_visited (tmp_widget))
add_widget_to_closure (tmp_widget, mode, groups, widgets);
tmp_widgets = tmp_widgets->next;
}
}
static void
add_widget_to_closure (GtkWidget *widget,
GtkSizeGroupMode mode,
GSList **groups,
GSList **widgets)
{
GSList *tmp_groups;
*widgets = g_slist_prepend (*widgets, widget);
_gtk_widget_set_sizegroup_visited (widget, TRUE);
tmp_groups = _gtk_widget_get_sizegroups (widget);
while (tmp_groups)
{
GtkSizeGroup *tmp_group = tmp_groups->data;
GtkSizeGroupPrivate *tmp_priv = tmp_group->priv;
if ((tmp_priv->mode == GTK_SIZE_GROUP_BOTH || tmp_priv->mode == mode) &&
!tmp_group->priv->visited)
add_group_to_closure (tmp_group, mode, groups, widgets);
tmp_groups = tmp_groups->next;
}
}
static void
real_queue_resize (GtkWidget *widget,
GtkQueueResizeFlags flags)
{
GtkWidget *container;
_gtk_widget_set_alloc_needed (widget, TRUE);
_gtk_widget_set_width_request_needed (widget, TRUE);
_gtk_widget_set_height_request_needed (widget, TRUE);
container = gtk_widget_get_parent (widget);
if (!container &&
gtk_widget_is_toplevel (widget) && GTK_IS_CONTAINER (widget))
container = widget;
if (container)
{
if (flags & GTK_QUEUE_RESIZE_INVALIDATE_ONLY)
_gtk_container_resize_invalidate (GTK_CONTAINER (container));
else
_gtk_container_queue_resize (GTK_CONTAINER (container));
}
}
static void
reset_group_sizes (GSList *groups)
{
GSList *tmp_list = groups;
while (tmp_list)
{
GtkSizeGroup *tmp_group = tmp_list->data;
GtkSizeGroupPrivate *tmp_priv = tmp_group->priv;
tmp_priv->have_width = FALSE;
tmp_priv->have_height = FALSE;
tmp_list = tmp_list->next;
}
}
static void
queue_resize_on_widget (GtkWidget *widget,
gboolean check_siblings,
GtkQueueResizeFlags flags)
{
GtkWidget *parent = widget;
GSList *tmp_list;
while (parent)
{
GSList *widget_groups;
GSList *groups;
GSList *widgets;
if (widget == parent && !check_siblings)
{
real_queue_resize (widget, flags);
parent = gtk_widget_get_parent (parent);
continue;
}
widget_groups = _gtk_widget_get_sizegroups (parent);
if (!widget_groups)
{
if (widget == parent)
real_queue_resize (widget, flags);
parent = gtk_widget_get_parent (parent);
continue;
}
groups = NULL;
widgets = NULL;
add_widget_to_closure (parent, GTK_SIZE_GROUP_HORIZONTAL, &groups, &widgets);
g_slist_foreach (widgets, (GFunc)mark_widget_unvisited, NULL);
g_slist_foreach (groups, (GFunc)mark_group_unvisited, NULL);
reset_group_sizes (groups);
tmp_list = widgets;
while (tmp_list)
{
if (tmp_list->data == parent)
{
if (widget == parent)
real_queue_resize (parent, flags);
}
else if (tmp_list->data == widget)
{
g_warning ("A container and its child are part of this SizeGroup");
}
else
queue_resize_on_widget (tmp_list->data, FALSE, flags);
tmp_list = tmp_list->next;
}
g_slist_free (widgets);
g_slist_free (groups);
groups = NULL;
widgets = NULL;
add_widget_to_closure (parent, GTK_SIZE_GROUP_VERTICAL, &groups, &widgets);
g_slist_foreach (widgets, (GFunc)mark_widget_unvisited, NULL);
g_slist_foreach (groups, (GFunc)mark_group_unvisited, NULL);
reset_group_sizes (groups);
tmp_list = widgets;
while (tmp_list)
{
if (tmp_list->data == parent)
{
if (widget == parent)
real_queue_resize (parent, flags);
}
else if (tmp_list->data == widget)
{
g_warning ("A container and its child are part of this SizeGroup");
}
else
queue_resize_on_widget (tmp_list->data, FALSE, flags);
tmp_list = tmp_list->next;
}
g_slist_free (widgets);
g_slist_free (groups);
parent = gtk_widget_get_parent (parent);
}
}
static void
queue_resize_on_group (GtkSizeGroup *size_group)
{
GtkSizeGroupPrivate *priv = size_group->priv;
if (priv->widgets)
queue_resize_on_widget (priv->widgets->data, TRUE, 0);
}
static void
gtk_size_group_class_init (GtkSizeGroupClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = gtk_size_group_set_property;
gobject_class->get_property = gtk_size_group_get_property;
g_object_class_install_property (gobject_class,
PROP_MODE,
g_param_spec_enum ("mode",
P_("Mode"),
P_("The directions in which the size group affects the requested sizes"
" of its component widgets"),
GTK_TYPE_SIZE_GROUP_MODE,
GTK_SIZE_GROUP_HORIZONTAL, GTK_PARAM_READWRITE));
/**
* GtkSizeGroup:ignore-hidden:
*
* If %TRUE, unmapped widgets are ignored when determining
* the size of the group.
*
* Since: 2.8
*/
g_object_class_install_property (gobject_class,
PROP_IGNORE_HIDDEN,
g_param_spec_boolean ("ignore-hidden",
P_("Ignore hidden"),
P_("If TRUE, unmapped widgets are ignored "
"when determining the size of the group"),
FALSE,
GTK_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (GtkSizeGroupPrivate));
}
static void
gtk_size_group_init (GtkSizeGroup *size_group)
{
GtkSizeGroupPrivate *priv;
size_group->priv = G_TYPE_INSTANCE_GET_PRIVATE (size_group,
GTK_TYPE_SIZE_GROUP,
GtkSizeGroupPrivate);
priv = size_group->priv;
priv->widgets = NULL;
priv->mode = GTK_SIZE_GROUP_HORIZONTAL;
priv->have_width = 0;
priv->have_height = 0;
priv->ignore_hidden = 0;
priv->visited = FALSE;
}
static void
gtk_size_group_buildable_init (GtkBuildableIface *iface)
{
iface->custom_tag_start = gtk_size_group_buildable_custom_tag_start;
iface->custom_finished = gtk_size_group_buildable_custom_finished;
}
G_DEFINE_TYPE_WITH_CODE (GtkSizeGroup, gtk_size_group, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_size_group_buildable_init))
static void
gtk_size_group_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkSizeGroup *size_group = GTK_SIZE_GROUP (object);
switch (prop_id)
{
case PROP_MODE:
gtk_size_group_set_mode (size_group, g_value_get_enum (value));
break;
case PROP_IGNORE_HIDDEN:
gtk_size_group_set_ignore_hidden (size_group, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_size_group_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkSizeGroup *size_group = GTK_SIZE_GROUP (object);
GtkSizeGroupPrivate *priv = size_group->priv;
switch (prop_id)
{
case PROP_MODE:
g_value_set_enum (value, priv->mode);
break;
case PROP_IGNORE_HIDDEN:
g_value_set_boolean (value, priv->ignore_hidden);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_size_group_new:
* @mode: the mode for the new size group.
*
* Create a new #GtkSizeGroup.
* Return value: a newly created #GtkSizeGroup
**/
GtkSizeGroup *
gtk_size_group_new (GtkSizeGroupMode mode)
{
GtkSizeGroup *size_group = g_object_new (GTK_TYPE_SIZE_GROUP, NULL);
GtkSizeGroupPrivate *priv = size_group->priv;
priv->mode = mode;
return size_group;
}
/**
* gtk_size_group_set_mode:
* @size_group: a #GtkSizeGroup
* @mode: the mode to set for the size group.
*
* Sets the #GtkSizeGroupMode of the size group. The mode of the size
* group determines whether the widgets in the size group should
* all have the same horizontal requisition (%GTK_SIZE_GROUP_HORIZONTAL)
* all have the same vertical requisition (%GTK_SIZE_GROUP_VERTICAL),
* or should all have the same requisition in both directions
* (%GTK_SIZE_GROUP_BOTH).
**/
void
gtk_size_group_set_mode (GtkSizeGroup *size_group,
GtkSizeGroupMode mode)
{
GtkSizeGroupPrivate *priv;
g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
priv = size_group->priv;
if (priv->mode != mode)
{
if (priv->mode != GTK_SIZE_GROUP_NONE)
queue_resize_on_group (size_group);
priv->mode = mode;
if (priv->mode != GTK_SIZE_GROUP_NONE)
queue_resize_on_group (size_group);
g_object_notify (G_OBJECT (size_group), "mode");
}
}
/**
* gtk_size_group_get_mode:
* @size_group: a #GtkSizeGroup
*
* Gets the current mode of the size group. See gtk_size_group_set_mode().
*
* Return value: the current mode of the size group.
**/
GtkSizeGroupMode
gtk_size_group_get_mode (GtkSizeGroup *size_group)
{
g_return_val_if_fail (GTK_IS_SIZE_GROUP (size_group), GTK_SIZE_GROUP_BOTH);
return size_group->priv->mode;
}
/**
* gtk_size_group_set_ignore_hidden:
* @size_group: a #GtkSizeGroup
* @ignore_hidden: whether unmapped widgets should be ignored
* when calculating the size
*
* Sets whether unmapped widgets should be ignored when
* calculating the size.
*
* Since: 2.8
*/
void
gtk_size_group_set_ignore_hidden (GtkSizeGroup *size_group,
gboolean ignore_hidden)
{
GtkSizeGroupPrivate *priv;
g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
priv = size_group->priv;
ignore_hidden = ignore_hidden != FALSE;
if (priv->ignore_hidden != ignore_hidden)
{
priv->ignore_hidden = ignore_hidden;
g_object_notify (G_OBJECT (size_group), "ignore-hidden");
}
}
/**
* gtk_size_group_get_ignore_hidden:
* @size_group: a #GtkSizeGroup
*
* Returns if invisible widgets are ignored when calculating the size.
*
* Returns: %TRUE if invisible widgets are ignored.
*
* Since: 2.8
*/
gboolean
gtk_size_group_get_ignore_hidden (GtkSizeGroup *size_group)
{
g_return_val_if_fail (GTK_IS_SIZE_GROUP (size_group), FALSE);
return size_group->priv->ignore_hidden;
}
static void
gtk_size_group_widget_destroyed (GtkWidget *widget,
GtkSizeGroup *size_group)
{
gtk_size_group_remove_widget (size_group, widget);
}
/**
* gtk_size_group_add_widget:
* @size_group: a #GtkSizeGroup
* @widget: the #GtkWidget to add
*
* Adds a widget to a #GtkSizeGroup. In the future, the requisition
* of the widget will be determined as the maximum of its requisition
* and the requisition of the other widgets in the size group.
* Whether this applies horizontally, vertically, or in both directions
* depends on the mode of the size group. See gtk_size_group_set_mode().
*
* When the widget is destroyed or no longer referenced elsewhere, it will
* be removed from the size group.
*/
void
gtk_size_group_add_widget (GtkSizeGroup *size_group,
GtkWidget *widget)
{
GtkSizeGroupPrivate *priv;
GSList *groups;
g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
g_return_if_fail (GTK_IS_WIDGET (widget));
priv = size_group->priv;
groups = _gtk_widget_get_sizegroups (widget);
if (!g_slist_find (groups, size_group))
{
_gtk_widget_add_sizegroup (widget, size_group);
priv->widgets = g_slist_prepend (priv->widgets, widget);
g_signal_connect (widget, "destroy",
G_CALLBACK (gtk_size_group_widget_destroyed),
size_group);
g_object_ref (size_group);
}
queue_resize_on_group (size_group);
}
/**
* gtk_size_group_remove_widget:
* @size_group: a #GtkSizeGroup
* @widget: the #GtkWidget to remove
*
* Removes a widget from a #GtkSizeGroup.
**/
void
gtk_size_group_remove_widget (GtkSizeGroup *size_group,
GtkWidget *widget)
{
GtkSizeGroupPrivate *priv;
g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
g_return_if_fail (GTK_IS_WIDGET (widget));
priv = size_group->priv;
g_return_if_fail (g_slist_find (priv->widgets, widget));
g_signal_handlers_disconnect_by_func (widget,
gtk_size_group_widget_destroyed,
size_group);
_gtk_widget_remove_sizegroup (widget, size_group);
priv->widgets = g_slist_remove (priv->widgets, widget);
queue_resize_on_group (size_group);
gtk_widget_queue_resize (widget);
g_object_unref (size_group);
}
/**
* gtk_size_group_get_widgets:
* @size_group: a #GtkSizeGroup
*
* Returns the list of widgets associated with @size_group.
*
* Return value: (element-type GtkWidget) (transfer none): a #GSList of
* widgets. The list is owned by GTK+ and should not be modified.
*
* Since: 2.10
**/
GSList *
gtk_size_group_get_widgets (GtkSizeGroup *size_group)
{
return size_group->priv->widgets;
}
static void
compute_dimension (GtkWidget *widget,
GtkSizeGroupMode mode,
gint *minimum, /* in-out */
gint *natural) /* in-out */
{
GSList *widgets = NULL;
GSList *groups = NULL;
GSList *tmp_list;
gint min_result = 0, nat_result = 0;
add_widget_to_closure (widget, mode, &groups, &widgets);
g_slist_foreach (widgets, (GFunc)mark_widget_unvisited, NULL);
g_slist_foreach (groups, (GFunc)mark_group_unvisited, NULL);
g_slist_foreach (widgets, (GFunc)g_object_ref, NULL);
if (!groups)
{
min_result = *minimum;
nat_result = *natural;
}
else
{
GtkSizeGroup *group = groups->data;
GtkSizeGroupPrivate *priv = group->priv;
if (mode == GTK_SIZE_GROUP_HORIZONTAL && priv->have_width)
{
min_result = priv->minimum_req.width;
nat_result = priv->natural_req.width;
}
else if (mode == GTK_SIZE_GROUP_VERTICAL && priv->have_height)
{
min_result = priv->minimum_req.height;
nat_result = priv->natural_req.height;
}
else
{
tmp_list = widgets;
while (tmp_list)
{
GtkWidget *tmp_widget = tmp_list->data;
gint min_dimension, nat_dimension;
if (tmp_widget == widget)
{
min_dimension = *minimum;
nat_dimension = *natural;
}
else
{
if (mode == GTK_SIZE_GROUP_HORIZONTAL)
gtk_widget_get_preferred_width (tmp_widget, &min_dimension, &nat_dimension);
else
gtk_widget_get_preferred_height (tmp_widget, &min_dimension, &nat_dimension);
}
if (gtk_widget_get_mapped (tmp_widget) || !priv->ignore_hidden)
{
min_result = MAX (min_result, min_dimension);
nat_result = MAX (nat_result, nat_dimension);
}
tmp_list = tmp_list->next;
}
tmp_list = groups;
while (tmp_list)
{
GtkSizeGroup *tmp_group = tmp_list->data;
GtkSizeGroupPrivate *tmp_priv = tmp_group->priv;
if (mode == GTK_SIZE_GROUP_HORIZONTAL)
{
tmp_priv->have_width = TRUE;
tmp_priv->minimum_req.width = min_result;
tmp_priv->natural_req.width = nat_result;
}
else
{
tmp_priv->have_height = TRUE;
tmp_priv->minimum_req.height = min_result;
tmp_priv->natural_req.height = nat_result;
}
tmp_list = tmp_list->next;
}
}
}
g_slist_foreach (widgets, (GFunc)g_object_unref, NULL);
g_slist_free (widgets);
g_slist_free (groups);
*minimum = min_result;
*natural = nat_result;
}
/**
* _gtk_size_group_bump_requisition:
* @widget: a #GtkWidget
* @mode: either %GTK_SIZE_GROUP_HORIZONTAL or %GTK_SIZE_GROUP_VERTICAL, depending
* on the dimension in which to bump the size.
* @minimum: a pointer to the widget's minimum size
* @natural: a pointer to the widget's natural size
*
* Refreshes the sizegroup while returning the groups requested
* value in the dimension @mode.
*
* This function is used both to update sizegroup minimum and natural size
* information and widget minimum and natural sizes in multiple passes from
* the size request apis.
*/
void
_gtk_size_group_bump_requisition (GtkWidget *widget,
GtkSizeGroupMode mode,
gint *minimum,
gint *natural)
{
if (!_gtk_widget_get_sizegroup_bumping (widget))
{
/* Avoid recursion here */
_gtk_widget_set_sizegroup_bumping (widget, TRUE);
if (_gtk_widget_get_sizegroups (widget))
compute_dimension (widget, mode, minimum, natural);
_gtk_widget_set_sizegroup_bumping (widget, FALSE);
}
}
/**
* _gtk_size_group_queue_resize:
* @widget: a #GtkWidget
*
* Queue a resize on a widget, and on all other widgets grouped with this widget.
**/
void
_gtk_size_group_queue_resize (GtkWidget *widget,
GtkQueueResizeFlags flags)
{
queue_resize_on_widget (widget, TRUE, flags);
}
typedef struct {
GObject *object;
GSList *items;
} GSListSubParserData;
static void
size_group_start_element (GMarkupParseContext *context,
const gchar *element_name,
const gchar **names,
const gchar **values,
gpointer user_data,
GError **error)
{
guint i;
GSListSubParserData *data = (GSListSubParserData*)user_data;
if (strcmp (element_name, "widget") == 0)
for (i = 0; names[i]; i++)
if (strcmp (names[i], "name") == 0)
data->items = g_slist_prepend (data->items, g_strdup (values[i]));
else if (strcmp (element_name, "widgets") == 0)
return;
else
g_warning ("Unsupported type tag for GtkSizeGroup: %s\n",
element_name);
}
static const GMarkupParser size_group_parser =
{
size_group_start_element
};
static gboolean
gtk_size_group_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
GMarkupParser *parser,
gpointer *data)
{
GSListSubParserData *parser_data;
if (child)
return FALSE;
if (strcmp (tagname, "widgets") == 0)
{
parser_data = g_slice_new0 (GSListSubParserData);
parser_data->items = NULL;
parser_data->object = G_OBJECT (buildable);
*parser = size_group_parser;
*data = parser_data;
return TRUE;
}
return FALSE;
}
static void
gtk_size_group_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *tagname,
gpointer user_data)
{
GSList *l;
GSListSubParserData *data;
GObject *object;
if (strcmp (tagname, "widgets"))
return;
data = (GSListSubParserData*)user_data;
data->items = g_slist_reverse (data->items);
for (l = data->items; l; l = l->next)
{
object = gtk_builder_get_object (builder, l->data);
if (!object)
{
g_warning ("Unknown object %s specified in sizegroup %s",
(const gchar*)l->data,
gtk_buildable_get_name (GTK_BUILDABLE (data->object)));
continue;
}
gtk_size_group_add_widget (GTK_SIZE_GROUP (data->object),
GTK_WIDGET (object));
g_free (l->data);
}
g_slist_free (data->items);
g_slice_free (GSListSubParserData, data);
}
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