/* GTK - The GIMP Toolkit
*
* Copyright (C) 2003 Sun Microsystems, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see
*/
/**
* SECTION:gtkexpander
* @Short_description: A container which can hide its child
* @Title: GtkExpander
*
* A #GtkExpander allows the user to hide or show its child by clicking
* on an expander triangle similar to the triangles used in a #GtkTreeView.
*
* Normally you use an expander as you would use any other descendant
* of #GtkBin; you create the child widget and use gtk_container_add()
* to add it to the expander. When the expander is toggled, it will take
* care of showing and hiding the child automatically.
*
* # Special Usage
*
* There are situations in which you may prefer to show and hide the
* expanded widget yourself, such as when you want to actually create
* the widget at expansion time. In this case, create a #GtkExpander
* but do not add a child to it. The expander widget has an
* #GtkExpander:expanded property which can be used to monitor
* its expansion state. You should watch this property with a signal
* connection as follows:
*
* |[
* expander = gtk_expander_new_with_mnemonic ("_More Options");
* g_signal_connect (expander, "notify::expanded",
* G_CALLBACK (expander_callback), NULL);
*
* ...
*
* static void
* expander_callback (GObject *object,
* GParamSpec *param_spec,
* gpointer user_data)
* {
* GtkExpander *expander;
*
* expander = GTK_EXPANDER (object);
*
* if (gtk_expander_get_expanded (expander))
* {
* // Show or create widgets
* }
* else
* {
* // Hide or destroy widgets
* }
* }
* ]|
*
* # GtkExpander as GtkBuildable
*
* The GtkExpander implementation of the GtkBuildable interface supports
* placing a child in the label position by specifying “label” as the
* “type” attribute of a element. A normal content child can be
* specified without specifying a type attribute.
*
* An example of a UI definition fragment with GtkExpander:
* |[
*
*
*
*
*
*
* ]|
*
* # CSS nodes
*
* |[
* expander
* ├── title
* │ ├── arrow
* │ ╰──
* ╰──
* ]|
*
* GtkExpander has three CSS nodes, the main node with the name expander,
* a subnode with name title and node below it with name arrow. Neither of
* them is using any style classes.
*/
#include "config.h"
#include
#include "gtkexpander.h"
#include "gtklabel.h"
#include "gtkbuildable.h"
#include "gtkcontainer.h"
#include "gtkmarshalers.h"
#include "gtkmain.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtkdnd.h"
#include "a11y/gtkexpanderaccessible.h"
#include "gtkstylecontextprivate.h"
#include "gtkcsscustomgadgetprivate.h"
#include "gtkboxgadgetprivate.h"
#include "gtkbuiltiniconprivate.h"
#include "gtkwidgetprivate.h"
#include "gtkcontainerprivate.h"
#define DEFAULT_EXPANDER_SIZE 10
#define DEFAULT_EXPANDER_SPACING 2
#define TIMEOUT_EXPAND 500
enum
{
PROP_0,
PROP_EXPANDED,
PROP_LABEL,
PROP_USE_UNDERLINE,
PROP_USE_MARKUP,
PROP_SPACING,
PROP_LABEL_WIDGET,
PROP_LABEL_FILL,
PROP_RESIZE_TOPLEVEL
};
struct _GtkExpanderPrivate
{
GtkWidget *label_widget;
GdkWindow *event_window;
GtkCssGadget *gadget;
GtkCssGadget *title_gadget;
GtkCssGadget *arrow_gadget;
GtkGesture *multipress_gesture;
gint spacing;
guint expand_timer;
guint expanded : 1;
guint use_underline : 1;
guint use_markup : 1;
guint prelight : 1;
guint label_fill : 1;
guint resize_toplevel : 1;
};
static void gtk_expander_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_expander_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_expander_destroy (GtkWidget *widget);
static void gtk_expander_realize (GtkWidget *widget);
static void gtk_expander_unrealize (GtkWidget *widget);
static void gtk_expander_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_expander_map (GtkWidget *widget);
static void gtk_expander_unmap (GtkWidget *widget);
static gboolean gtk_expander_draw (GtkWidget *widget,
cairo_t *cr);
static gboolean gtk_expander_enter_notify (GtkWidget *widget,
GdkEventCrossing *event);
static gboolean gtk_expander_leave_notify (GtkWidget *widget,
GdkEventCrossing *event);
static gboolean gtk_expander_focus (GtkWidget *widget,
GtkDirectionType direction);
static gboolean gtk_expander_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static void gtk_expander_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time);
static void gtk_expander_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_expander_remove (GtkContainer *container,
GtkWidget *widget);
static void gtk_expander_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
static void gtk_expander_activate (GtkExpander *expander);
/* GtkBuildable */
static void gtk_expander_buildable_init (GtkBuildableIface *iface);
static void gtk_expander_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type);
/* GtkWidget */
static void gtk_expander_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_expander_get_preferred_height (GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_expander_get_preferred_height_for_width (GtkWidget *layout,
gint width,
gint *minimum_height,
gint *natural_height);
static void gtk_expander_get_preferred_width_for_height (GtkWidget *layout,
gint width,
gint *minimum_height,
gint *natural_height);
static void gtk_expander_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state);
static void gtk_expander_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction);
/* Gestures */
static void gesture_multipress_released_cb (GtkGestureMultiPress *gesture,
gint n_press,
gdouble x,
gdouble y,
GtkExpander *expander);
G_DEFINE_TYPE_WITH_CODE (GtkExpander, gtk_expander, GTK_TYPE_BIN,
G_ADD_PRIVATE (GtkExpander)
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_expander_buildable_init))
static void
gtk_expander_class_init (GtkExpanderClass *klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
gobject_class = (GObjectClass *) klass;
widget_class = (GtkWidgetClass *) klass;
container_class = (GtkContainerClass *) klass;
gobject_class->set_property = gtk_expander_set_property;
gobject_class->get_property = gtk_expander_get_property;
widget_class->destroy = gtk_expander_destroy;
widget_class->realize = gtk_expander_realize;
widget_class->unrealize = gtk_expander_unrealize;
widget_class->size_allocate = gtk_expander_size_allocate;
widget_class->map = gtk_expander_map;
widget_class->unmap = gtk_expander_unmap;
widget_class->draw = gtk_expander_draw;
widget_class->enter_notify_event = gtk_expander_enter_notify;
widget_class->leave_notify_event = gtk_expander_leave_notify;
widget_class->focus = gtk_expander_focus;
widget_class->drag_motion = gtk_expander_drag_motion;
widget_class->drag_leave = gtk_expander_drag_leave;
widget_class->get_preferred_width = gtk_expander_get_preferred_width;
widget_class->get_preferred_height = gtk_expander_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_expander_get_preferred_height_for_width;
widget_class->get_preferred_width_for_height = gtk_expander_get_preferred_width_for_height;
widget_class->state_flags_changed = gtk_expander_state_flags_changed;
widget_class->direction_changed = gtk_expander_direction_changed;
container_class->add = gtk_expander_add;
container_class->remove = gtk_expander_remove;
container_class->forall = gtk_expander_forall;
klass->activate = gtk_expander_activate;
g_object_class_install_property (gobject_class,
PROP_EXPANDED,
g_param_spec_boolean ("expanded",
P_("Expanded"),
P_("Whether the expander has been opened to reveal the child widget"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (gobject_class,
PROP_LABEL,
g_param_spec_string ("label",
P_("Label"),
P_("Text of the expander's label"),
NULL,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class,
PROP_USE_UNDERLINE,
g_param_spec_boolean ("use-underline",
P_("Use underline"),
P_("If set, an underline in the text indicates the next character should be used for the mnemonic accelerator key"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (gobject_class,
PROP_USE_MARKUP,
g_param_spec_boolean ("use-markup",
P_("Use markup"),
P_("The text of the label includes XML markup. See pango_parse_markup()"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkExpander:spacing:
*
* Space to put between the label and the child when the
* expander is expanded.
*
* Deprecated: 3.20: This property is deprecated and ignored.
* Use margins on the child instead.
*/
g_object_class_install_property (gobject_class,
PROP_SPACING,
g_param_spec_int ("spacing",
P_("Spacing"),
P_("Space to put between the label and the child"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY|G_PARAM_DEPRECATED));
g_object_class_install_property (gobject_class,
PROP_LABEL_WIDGET,
g_param_spec_object ("label-widget",
P_("Label widget"),
P_("A widget to display in place of the usual expander label"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_LABEL_FILL,
g_param_spec_boolean ("label-fill",
P_("Label fill"),
P_("Whether the label widget should fill all available horizontal space"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkExpander:resize-toplevel:
*
* When this property is %TRUE, the expander will resize the toplevel
* widget containing the expander upon expanding and collapsing.
*
* Since: 3.2
*/
g_object_class_install_property (gobject_class,
PROP_RESIZE_TOPLEVEL,
g_param_spec_boolean ("resize-toplevel",
P_("Resize toplevel"),
P_("Whether the expander will resize the toplevel window upon expanding and collapsing"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkExpander:expander-size:
*
* The size of the expander arrow.
*
* Deprecated: 3.20: Use CSS min-width and min-height instead.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("expander-size",
P_("Expander Size"),
P_("Size of the expander arrow"),
0,
G_MAXINT,
DEFAULT_EXPANDER_SIZE,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
/**
* GtkExpander:expander-spacing:
*
* Spaing around the expander arrow.
*
* Deprecated: 3.20: Use CSS margins instead, the value of this
* style property is ignored.
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("expander-spacing",
P_("Indicator Spacing"),
P_("Spacing around expander arrow"),
0,
G_MAXINT,
DEFAULT_EXPANDER_SPACING,
GTK_PARAM_READABLE|G_PARAM_DEPRECATED));
widget_class->activate_signal =
g_signal_new (I_("activate"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkExpanderClass, activate),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_EXPANDER_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, "expander");
}
static void
gtk_expander_init (GtkExpander *expander)
{
GtkExpanderPrivate *priv;
GtkCssNode *widget_node;
expander->priv = priv = gtk_expander_get_instance_private (expander);
gtk_widget_set_can_focus (GTK_WIDGET (expander), TRUE);
gtk_widget_set_has_window (GTK_WIDGET (expander), FALSE);
priv->label_widget = NULL;
priv->event_window = NULL;
priv->spacing = 0;
priv->expanded = FALSE;
priv->use_underline = FALSE;
priv->use_markup = FALSE;
priv->prelight = FALSE;
priv->label_fill = FALSE;
priv->expand_timer = 0;
priv->resize_toplevel = 0;
widget_node = gtk_widget_get_css_node (GTK_WIDGET (expander));
priv->gadget = gtk_box_gadget_new_for_node (widget_node, GTK_WIDGET (expander));
gtk_box_gadget_set_orientation (GTK_BOX_GADGET (priv->gadget), GTK_ORIENTATION_VERTICAL);
priv->title_gadget = gtk_box_gadget_new ("title",
GTK_WIDGET (expander),
priv->gadget,
NULL);
gtk_box_gadget_set_orientation (GTK_BOX_GADGET (priv->title_gadget), GTK_ORIENTATION_HORIZONTAL);
gtk_box_gadget_set_draw_focus (GTK_BOX_GADGET (priv->title_gadget), TRUE);
gtk_box_gadget_insert_gadget (GTK_BOX_GADGET (priv->gadget), -1, priv->title_gadget, FALSE, GTK_ALIGN_START);
priv->arrow_gadget = gtk_builtin_icon_new ("arrow",
GTK_WIDGET (expander),
priv->title_gadget,
NULL);
gtk_css_gadget_add_class (priv->arrow_gadget, GTK_STYLE_CLASS_HORIZONTAL);
gtk_builtin_icon_set_default_size_property (GTK_BUILTIN_ICON (priv->arrow_gadget), "expander-size");
gtk_box_gadget_insert_gadget (GTK_BOX_GADGET (priv->title_gadget), -1, priv->arrow_gadget, FALSE, GTK_ALIGN_CENTER);
gtk_drag_dest_set (GTK_WIDGET (expander), 0, NULL, 0, 0);
gtk_drag_dest_set_track_motion (GTK_WIDGET (expander), TRUE);
priv->multipress_gesture = gtk_gesture_multi_press_new (GTK_WIDGET (expander));
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->multipress_gesture),
GDK_BUTTON_PRIMARY);
gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (priv->multipress_gesture),
FALSE);
g_signal_connect (priv->multipress_gesture, "released",
G_CALLBACK (gesture_multipress_released_cb), expander);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->multipress_gesture),
GTK_PHASE_BUBBLE);
}
static void
gtk_expander_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type)
{
if (!type)
gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
else if (strcmp (type, "label") == 0)
gtk_expander_set_label_widget (GTK_EXPANDER (buildable), GTK_WIDGET (child));
else
GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_EXPANDER (buildable), type);
}
static void
gtk_expander_buildable_init (GtkBuildableIface *iface)
{
iface->add_child = gtk_expander_buildable_add_child;
}
static void
gtk_expander_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkExpander *expander = GTK_EXPANDER (object);
switch (prop_id)
{
case PROP_EXPANDED:
gtk_expander_set_expanded (expander, g_value_get_boolean (value));
break;
case PROP_LABEL:
gtk_expander_set_label (expander, g_value_get_string (value));
break;
case PROP_USE_UNDERLINE:
gtk_expander_set_use_underline (expander, g_value_get_boolean (value));
break;
case PROP_USE_MARKUP:
gtk_expander_set_use_markup (expander, g_value_get_boolean (value));
break;
case PROP_SPACING:
gtk_expander_set_spacing (expander, g_value_get_int (value));
break;
case PROP_LABEL_WIDGET:
gtk_expander_set_label_widget (expander, g_value_get_object (value));
break;
case PROP_LABEL_FILL:
gtk_expander_set_label_fill (expander, g_value_get_boolean (value));
break;
case PROP_RESIZE_TOPLEVEL:
gtk_expander_set_resize_toplevel (expander, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_expander_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkExpander *expander = GTK_EXPANDER (object);
GtkExpanderPrivate *priv = expander->priv;
switch (prop_id)
{
case PROP_EXPANDED:
g_value_set_boolean (value, priv->expanded);
break;
case PROP_LABEL:
g_value_set_string (value, gtk_expander_get_label (expander));
break;
case PROP_USE_UNDERLINE:
g_value_set_boolean (value, priv->use_underline);
break;
case PROP_USE_MARKUP:
g_value_set_boolean (value, priv->use_markup);
break;
case PROP_SPACING:
g_value_set_int (value, priv->spacing);
break;
case PROP_LABEL_WIDGET:
g_value_set_object (value,
priv->label_widget ?
G_OBJECT (priv->label_widget) : NULL);
break;
case PROP_LABEL_FILL:
g_value_set_boolean (value, priv->label_fill);
break;
case PROP_RESIZE_TOPLEVEL:
g_value_set_boolean (value, gtk_expander_get_resize_toplevel (expander));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_expander_destroy (GtkWidget *widget)
{
GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
if (priv->expand_timer)
{
g_source_remove (priv->expand_timer);
priv->expand_timer = 0;
}
g_clear_object (&priv->multipress_gesture);
GTK_WIDGET_CLASS (gtk_expander_parent_class)->destroy (widget);
g_clear_object (&priv->arrow_gadget);
g_clear_object (&priv->title_gadget);
g_clear_object (&priv->gadget);
}
static void
gtk_expander_realize (GtkWidget *widget)
{
GtkAllocation allocation;
GtkExpanderPrivate *priv;
GdkWindow *window;
GdkWindowAttr attributes;
gint attributes_mask;
priv = GTK_EXPANDER (widget)->priv;
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_ONLY;
attributes.event_mask = gtk_widget_get_events (widget)
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_ENTER_NOTIFY_MASK
| GDK_LEAVE_NOTIFY_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y;
window = gtk_widget_get_parent_window (widget);
gtk_widget_set_window (widget, window);
g_object_ref (window);
priv->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gtk_widget_register_window (widget, priv->event_window);
gtk_gesture_set_window (priv->multipress_gesture, priv->event_window);
gtk_widget_set_realized (widget, TRUE);
}
static void
gtk_expander_unrealize (GtkWidget *widget)
{
GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
if (priv->event_window)
{
gtk_gesture_set_window (priv->multipress_gesture, NULL);
gtk_widget_unregister_window (widget, priv->event_window);
gdk_window_destroy (priv->event_window);
priv->event_window = NULL;
}
GTK_WIDGET_CLASS (gtk_expander_parent_class)->unrealize (widget);
}
static void
gtk_expander_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
GtkAllocation clip;
gtk_widget_set_allocation (widget, allocation);
gtk_css_gadget_allocate (priv->gadget,
allocation,
gtk_widget_get_allocated_baseline (widget),
&clip);
gtk_widget_set_clip (widget, &clip);
if (gtk_widget_get_realized (widget))
{
GtkAllocation title_allocation;
gtk_css_gadget_get_border_allocation (priv->title_gadget, &title_allocation, NULL);
gdk_window_move_resize (priv->event_window,
title_allocation.x, title_allocation.y,
title_allocation.width, title_allocation.height);
}
}
static void
gtk_expander_map (GtkWidget *widget)
{
GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
if (priv->label_widget)
gtk_widget_map (priv->label_widget);
GTK_WIDGET_CLASS (gtk_expander_parent_class)->map (widget);
if (priv->event_window)
gdk_window_show (priv->event_window);
}
static void
gtk_expander_unmap (GtkWidget *widget)
{
GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
if (priv->event_window)
gdk_window_hide (priv->event_window);
GTK_WIDGET_CLASS (gtk_expander_parent_class)->unmap (widget);
if (priv->label_widget)
gtk_widget_unmap (priv->label_widget);
}
static gboolean
gtk_expander_draw (GtkWidget *widget,
cairo_t *cr)
{
gtk_css_gadget_draw (GTK_EXPANDER (widget)->priv->gadget, cr);
return FALSE;
}
static void
gesture_multipress_released_cb (GtkGestureMultiPress *gesture,
gint n_press,
gdouble x,
gdouble y,
GtkExpander *expander)
{
if (expander->priv->prelight)
gtk_widget_activate (GTK_WIDGET (expander));
}
static void
gtk_expander_redraw_expander (GtkExpander *expander)
{
GtkAllocation allocation;
GtkWidget *widget = GTK_WIDGET (expander);
if (gtk_widget_get_realized (widget))
{
gtk_widget_get_allocation (widget, &allocation);
gdk_window_invalidate_rect (gtk_widget_get_window (widget), &allocation, FALSE);
}
}
static void
update_node_state (GtkExpander *expander)
{
GtkExpanderPrivate *priv = expander->priv;
GtkStateFlags state;
state = gtk_widget_get_state_flags (GTK_WIDGET (expander));
if (priv->prelight)
state |= GTK_STATE_FLAG_PRELIGHT;
else
state &= ~GTK_STATE_FLAG_PRELIGHT;
gtk_css_gadget_set_state (priv->title_gadget, state);
if (priv->expanded)
state |= GTK_STATE_FLAG_CHECKED;
else
state &= ~GTK_STATE_FLAG_CHECKED;
gtk_css_gadget_set_state (priv->arrow_gadget, state);
}
static void
gtk_expander_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state)
{
update_node_state (GTK_EXPANDER (widget));
GTK_WIDGET_CLASS (gtk_expander_parent_class)->state_flags_changed (widget, previous_state);
}
static void
gtk_expander_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction)
{
GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
GtkAlign align;
gtk_box_gadget_reverse_children (GTK_BOX_GADGET (priv->title_gadget));
align = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL ? GTK_ALIGN_END : GTK_ALIGN_START;
gtk_box_gadget_remove_gadget (GTK_BOX_GADGET (priv->gadget), priv->title_gadget);
gtk_box_gadget_insert_gadget (GTK_BOX_GADGET (priv->gadget), 0, priv->title_gadget, FALSE, align);
gtk_box_gadget_set_allocate_reverse (GTK_BOX_GADGET (priv->title_gadget),
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
gtk_box_gadget_set_align_reverse (GTK_BOX_GADGET (priv->title_gadget),
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
GTK_WIDGET_CLASS (gtk_expander_parent_class)->direction_changed (widget, previous_direction);
}
static gboolean
gtk_expander_enter_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkExpander *expander = GTK_EXPANDER (widget);
if (event->window == expander->priv->event_window &&
event->detail != GDK_NOTIFY_INFERIOR)
{
expander->priv->prelight = TRUE;
update_node_state (expander);
if (expander->priv->label_widget)
gtk_widget_set_state_flags (expander->priv->label_widget,
GTK_STATE_FLAG_PRELIGHT,
FALSE);
gtk_expander_redraw_expander (expander);
}
return FALSE;
}
static gboolean
gtk_expander_leave_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkExpander *expander = GTK_EXPANDER (widget);
if (event->window == expander->priv->event_window &&
event->detail != GDK_NOTIFY_INFERIOR)
{
expander->priv->prelight = FALSE;
update_node_state (expander);
if (expander->priv->label_widget)
gtk_widget_unset_state_flags (expander->priv->label_widget,
GTK_STATE_FLAG_PRELIGHT);
gtk_expander_redraw_expander (expander);
}
return FALSE;
}
static gboolean
expand_timeout (gpointer data)
{
GtkExpander *expander = GTK_EXPANDER (data);
GtkExpanderPrivate *priv = expander->priv;
priv->expand_timer = 0;
gtk_expander_set_expanded (expander, TRUE);
return FALSE;
}
static gboolean
gtk_expander_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GtkExpander *expander = GTK_EXPANDER (widget);
GtkExpanderPrivate *priv = expander->priv;
if (!priv->expanded && !priv->expand_timer)
{
priv->expand_timer = gdk_threads_add_timeout (TIMEOUT_EXPAND, (GSourceFunc) expand_timeout, expander);
g_source_set_name_by_id (priv->expand_timer, "[gtk+] expand_timeout");
}
return TRUE;
}
static void
gtk_expander_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
GtkExpander *expander = GTK_EXPANDER (widget);
GtkExpanderPrivate *priv = expander->priv;
if (priv->expand_timer)
{
g_source_remove (priv->expand_timer);
priv->expand_timer = 0;
}
}
typedef enum
{
FOCUS_NONE,
FOCUS_WIDGET,
FOCUS_LABEL,
FOCUS_CHILD
} FocusSite;
static gboolean
focus_current_site (GtkExpander *expander,
GtkDirectionType direction)
{
GtkWidget *current_focus;
current_focus = gtk_container_get_focus_child (GTK_CONTAINER (expander));
if (!current_focus)
return FALSE;
return gtk_widget_child_focus (current_focus, direction);
}
static gboolean
focus_in_site (GtkExpander *expander,
FocusSite site,
GtkDirectionType direction)
{
switch (site)
{
case FOCUS_WIDGET:
gtk_widget_grab_focus (GTK_WIDGET (expander));
return TRUE;
case FOCUS_LABEL:
if (expander->priv->label_widget)
return gtk_widget_child_focus (expander->priv->label_widget, direction);
else
return FALSE;
case FOCUS_CHILD:
{
GtkWidget *child = gtk_bin_get_child (GTK_BIN (expander));
if (child && gtk_widget_get_child_visible (child))
return gtk_widget_child_focus (child, direction);
else
return FALSE;
}
case FOCUS_NONE:
break;
}
g_assert_not_reached ();
return FALSE;
}
static FocusSite
get_next_site (GtkExpander *expander,
FocusSite site,
GtkDirectionType direction)
{
gboolean ltr;
ltr = gtk_widget_get_direction (GTK_WIDGET (expander)) != GTK_TEXT_DIR_RTL;
switch (site)
{
case FOCUS_NONE:
switch (direction)
{
case GTK_DIR_TAB_BACKWARD:
case GTK_DIR_LEFT:
case GTK_DIR_UP:
return FOCUS_CHILD;
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_DOWN:
case GTK_DIR_RIGHT:
return FOCUS_WIDGET;
}
break;
case FOCUS_WIDGET:
switch (direction)
{
case GTK_DIR_TAB_BACKWARD:
case GTK_DIR_UP:
return FOCUS_NONE;
case GTK_DIR_LEFT:
return ltr ? FOCUS_NONE : FOCUS_LABEL;
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_DOWN:
return FOCUS_LABEL;
case GTK_DIR_RIGHT:
return ltr ? FOCUS_LABEL : FOCUS_NONE;
}
break;
case FOCUS_LABEL:
switch (direction)
{
case GTK_DIR_TAB_BACKWARD:
case GTK_DIR_UP:
return FOCUS_WIDGET;
case GTK_DIR_LEFT:
return ltr ? FOCUS_WIDGET : FOCUS_CHILD;
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_DOWN:
return FOCUS_CHILD;
case GTK_DIR_RIGHT:
return ltr ? FOCUS_CHILD : FOCUS_WIDGET;
}
break;
case FOCUS_CHILD:
switch (direction)
{
case GTK_DIR_TAB_BACKWARD:
case GTK_DIR_LEFT:
case GTK_DIR_UP:
return FOCUS_LABEL;
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_DOWN:
case GTK_DIR_RIGHT:
return FOCUS_NONE;
}
break;
}
g_assert_not_reached ();
return FOCUS_NONE;
}
static void
gtk_expander_resize_toplevel (GtkExpander *expander)
{
GtkExpanderPrivate *priv = expander->priv;
GtkWidget *child = gtk_bin_get_child (GTK_BIN (expander));
if (child && priv->resize_toplevel &&
gtk_widget_get_realized (GTK_WIDGET (expander)))
{
GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (expander));
if (toplevel && gtk_widget_get_realized (toplevel))
{
GtkAllocation toplevel_allocation;
GtkAllocation child_allocation;
gtk_widget_get_allocation (toplevel, &toplevel_allocation);
gtk_widget_get_allocation (child, &child_allocation);
if (priv->expanded)
{
GtkRequisition child_requisition;
gtk_widget_get_preferred_height_for_width (child, child_allocation.width, &child_requisition.height, NULL);
toplevel_allocation.height += child_requisition.height;
}
else
{
toplevel_allocation.height -= child_allocation.height;
}
gtk_window_resize (GTK_WINDOW (toplevel),
toplevel_allocation.width,
toplevel_allocation.height);
}
}
}
static gboolean
gtk_expander_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkExpander *expander = GTK_EXPANDER (widget);
if (!focus_current_site (expander, direction))
{
GtkWidget *old_focus_child;
gboolean widget_is_focus;
FocusSite site = FOCUS_NONE;
widget_is_focus = gtk_widget_is_focus (widget);
old_focus_child = gtk_container_get_focus_child (GTK_CONTAINER (widget));
if (old_focus_child && old_focus_child == expander->priv->label_widget)
site = FOCUS_LABEL;
else if (old_focus_child)
site = FOCUS_CHILD;
else if (widget_is_focus)
site = FOCUS_WIDGET;
while ((site = get_next_site (expander, site, direction)) != FOCUS_NONE)
{
if (focus_in_site (expander, site, direction))
return TRUE;
}
return FALSE;
}
return TRUE;
}
static void
gtk_expander_add (GtkContainer *container,
GtkWidget *widget)
{
GtkExpander *expander = GTK_EXPANDER (container);
GTK_CONTAINER_CLASS (gtk_expander_parent_class)->add (container, widget);
gtk_widget_queue_resize (GTK_WIDGET (container));
if (expander->priv->expanded)
gtk_box_gadget_insert_widget (GTK_BOX_GADGET (expander->priv->gadget), -1, widget);
}
static void
gtk_expander_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkExpander *expander = GTK_EXPANDER (container);
if (GTK_EXPANDER (expander)->priv->label_widget == widget)
gtk_expander_set_label_widget (expander, NULL);
else
{
gtk_box_gadget_remove_widget (GTK_BOX_GADGET (expander->priv->gadget), widget);
GTK_CONTAINER_CLASS (gtk_expander_parent_class)->remove (container, widget);
}
}
static void
gtk_expander_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkBin *bin = GTK_BIN (container);
GtkExpanderPrivate *priv = GTK_EXPANDER (container)->priv;
GtkWidget *child;
child = gtk_bin_get_child (bin);
if (child)
(* callback) (child, callback_data);
if (priv->label_widget)
(* callback) (priv->label_widget, callback_data);
}
static void
gtk_expander_activate (GtkExpander *expander)
{
gtk_expander_set_expanded (expander, !expander->priv->expanded);
}
static void
gtk_expander_get_preferred_width (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_css_gadget_get_preferred_size (GTK_EXPANDER (widget)->priv->gadget,
GTK_ORIENTATION_HORIZONTAL,
-1,
minimum_size, natural_size,
NULL, NULL);
}
static void
gtk_expander_get_preferred_height (GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_css_gadget_get_preferred_size (GTK_EXPANDER (widget)->priv->gadget,
GTK_ORIENTATION_VERTICAL,
-1,
minimum_size, natural_size,
NULL, NULL);
}
static void
gtk_expander_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_size,
gint *natural_size)
{
gtk_css_gadget_get_preferred_size (GTK_EXPANDER (widget)->priv->gadget,
GTK_ORIENTATION_HORIZONTAL,
height,
minimum_size, natural_size,
NULL, NULL);
}
static void
gtk_expander_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum_size,
gint *natural_size)
{
gtk_css_gadget_get_preferred_size (GTK_EXPANDER (widget)->priv->gadget,
GTK_ORIENTATION_VERTICAL,
width,
minimum_size, natural_size,
NULL, NULL);
}
/**
* gtk_expander_new:
* @label: the text of the label
*
* Creates a new expander using @label as the text of the label.
*
* Returns: a new #GtkExpander widget.
*
* Since: 2.4
*/
GtkWidget *
gtk_expander_new (const gchar *label)
{
return g_object_new (GTK_TYPE_EXPANDER, "label", label, NULL);
}
/**
* gtk_expander_new_with_mnemonic:
* @label: (allow-none): the text of the label with an underscore
* in front of the mnemonic character
*
* Creates a new expander using @label as the text of the label.
* If characters in @label are preceded by an underscore, they are underlined.
* If you need a literal underscore character in a label, use “__” (two
* underscores). The first underlined character represents a keyboard
* accelerator called a mnemonic.
* Pressing Alt and that key activates the button.
*
* Returns: a new #GtkExpander widget.
*
* Since: 2.4
*/
GtkWidget *
gtk_expander_new_with_mnemonic (const gchar *label)
{
return g_object_new (GTK_TYPE_EXPANDER,
"label", label,
"use-underline", TRUE,
NULL);
}
/**
* gtk_expander_set_expanded:
* @expander: a #GtkExpander
* @expanded: whether the child widget is revealed
*
* Sets the state of the expander. Set to %TRUE, if you want
* the child widget to be revealed, and %FALSE if you want the
* child widget to be hidden.
*
* Since: 2.4
*/
void
gtk_expander_set_expanded (GtkExpander *expander,
gboolean expanded)
{
GtkExpanderPrivate *priv;
GtkWidget *child;
g_return_if_fail (GTK_IS_EXPANDER (expander));
priv = expander->priv;
expanded = expanded != FALSE;
if (priv->expanded == expanded)
return;
priv->expanded = expanded;
update_node_state (expander);
child = gtk_bin_get_child (GTK_BIN (expander));
if (child)
{
if (priv->expanded)
gtk_box_gadget_insert_widget (GTK_BOX_GADGET (priv->gadget), 1, child);
else
gtk_box_gadget_remove_widget (GTK_BOX_GADGET (priv->gadget), child);
gtk_widget_queue_resize (GTK_WIDGET (expander));
gtk_expander_resize_toplevel (expander);
}
g_object_notify (G_OBJECT (expander), "expanded");
}
/**
* gtk_expander_get_expanded:
* @expander:a #GtkExpander
*
* Queries a #GtkExpander and returns its current state. Returns %TRUE
* if the child widget is revealed.
*
* See gtk_expander_set_expanded().
*
* Returns: the current state of the expander
*
* Since: 2.4
*/
gboolean
gtk_expander_get_expanded (GtkExpander *expander)
{
g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
return expander->priv->expanded;
}
/**
* gtk_expander_set_spacing:
* @expander: a #GtkExpander
* @spacing: distance between the expander and child in pixels
*
* Sets the spacing field of @expander, which is the number of
* pixels to place between expander and the child.
*
* Since: 2.4
*
* Deprecated: 3.20: Use margins on the child instead.
*/
void
gtk_expander_set_spacing (GtkExpander *expander,
gint spacing)
{
g_return_if_fail (GTK_IS_EXPANDER (expander));
g_return_if_fail (spacing >= 0);
if (expander->priv->spacing != spacing)
{
expander->priv->spacing = spacing;
gtk_widget_queue_resize (GTK_WIDGET (expander));
g_object_notify (G_OBJECT (expander), "spacing");
}
}
/**
* gtk_expander_get_spacing:
* @expander: a #GtkExpander
*
* Gets the value set by gtk_expander_set_spacing().
*
* Returns: spacing between the expander and child
*
* Since: 2.4
*
* Deprecated: 3.20: Use margins on the child instead.
*/
gint
gtk_expander_get_spacing (GtkExpander *expander)
{
g_return_val_if_fail (GTK_IS_EXPANDER (expander), 0);
return expander->priv->spacing;
}
/**
* gtk_expander_set_label:
* @expander: a #GtkExpander
* @label: (allow-none): a string
*
* Sets the text of the label of the expander to @label.
*
* This will also clear any previously set labels.
*
* Since: 2.4
*/
void
gtk_expander_set_label (GtkExpander *expander,
const gchar *label)
{
g_return_if_fail (GTK_IS_EXPANDER (expander));
if (!label)
{
gtk_expander_set_label_widget (expander, NULL);
}
else
{
GtkWidget *child;
child = gtk_label_new (label);
gtk_label_set_use_underline (GTK_LABEL (child), expander->priv->use_underline);
gtk_label_set_use_markup (GTK_LABEL (child), expander->priv->use_markup);
gtk_widget_show (child);
gtk_expander_set_label_widget (expander, child);
}
g_object_notify (G_OBJECT (expander), "label");
}
/**
* gtk_expander_get_label:
* @expander: a #GtkExpander
*
* Fetches the text from a label widget including any embedded
* underlines indicating mnemonics and Pango markup, as set by
* gtk_expander_set_label(). If the label text has not been set the
* return value will be %NULL. This will be the case if you create an
* empty button with gtk_button_new() to use as a container.
*
* Note that this function behaved differently in versions prior to
* 2.14 and used to return the label text stripped of embedded
* underlines indicating mnemonics and Pango markup. This problem can
* be avoided by fetching the label text directly from the label
* widget.
*
* Returns: The text of the label widget. This string is owned
* by the widget and must not be modified or freed.
*
* Since: 2.4
*/
const char *
gtk_expander_get_label (GtkExpander *expander)
{
GtkExpanderPrivate *priv;
g_return_val_if_fail (GTK_IS_EXPANDER (expander), NULL);
priv = expander->priv;
if (GTK_IS_LABEL (priv->label_widget))
return gtk_label_get_label (GTK_LABEL (priv->label_widget));
else
return NULL;
}
/**
* gtk_expander_set_use_underline:
* @expander: a #GtkExpander
* @use_underline: %TRUE if underlines in the text indicate mnemonics
*
* If true, an underline in the text of the expander label indicates
* the next character should be used for the mnemonic accelerator key.
*
* Since: 2.4
*/
void
gtk_expander_set_use_underline (GtkExpander *expander,
gboolean use_underline)
{
GtkExpanderPrivate *priv;
g_return_if_fail (GTK_IS_EXPANDER (expander));
priv = expander->priv;
use_underline = use_underline != FALSE;
if (priv->use_underline != use_underline)
{
priv->use_underline = use_underline;
if (GTK_IS_LABEL (priv->label_widget))
gtk_label_set_use_underline (GTK_LABEL (priv->label_widget), use_underline);
g_object_notify (G_OBJECT (expander), "use-underline");
}
}
/**
* gtk_expander_get_use_underline:
* @expander: a #GtkExpander
*
* Returns whether an embedded underline in the expander label
* indicates a mnemonic. See gtk_expander_set_use_underline().
*
* Returns: %TRUE if an embedded underline in the expander
* label indicates the mnemonic accelerator keys
*
* Since: 2.4
*/
gboolean
gtk_expander_get_use_underline (GtkExpander *expander)
{
g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
return expander->priv->use_underline;
}
/**
* gtk_expander_set_use_markup:
* @expander: a #GtkExpander
* @use_markup: %TRUE if the label’s text should be parsed for markup
*
* Sets whether the text of the label contains markup in
* [Pango’s text markup language][PangoMarkupFormat].
* See gtk_label_set_markup().
*
* Since: 2.4
*/
void
gtk_expander_set_use_markup (GtkExpander *expander,
gboolean use_markup)
{
GtkExpanderPrivate *priv;
g_return_if_fail (GTK_IS_EXPANDER (expander));
priv = expander->priv;
use_markup = use_markup != FALSE;
if (priv->use_markup != use_markup)
{
priv->use_markup = use_markup;
if (GTK_IS_LABEL (priv->label_widget))
gtk_label_set_use_markup (GTK_LABEL (priv->label_widget), use_markup);
g_object_notify (G_OBJECT (expander), "use-markup");
}
}
/**
* gtk_expander_get_use_markup:
* @expander: a #GtkExpander
*
* Returns whether the label’s text is interpreted as marked up with
* the [Pango text markup language][PangoMarkupFormat].
* See gtk_expander_set_use_markup().
*
* Returns: %TRUE if the label’s text will be parsed for markup
*
* Since: 2.4
*/
gboolean
gtk_expander_get_use_markup (GtkExpander *expander)
{
g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
return expander->priv->use_markup;
}
/**
* gtk_expander_set_label_widget:
* @expander: a #GtkExpander
* @label_widget: (allow-none): the new label widget
*
* Set the label widget for the expander. This is the widget
* that will appear embedded alongside the expander arrow.
*
* Since: 2.4
*/
void
gtk_expander_set_label_widget (GtkExpander *expander,
GtkWidget *label_widget)
{
GtkExpanderPrivate *priv;
GtkWidget *widget;
int pos;
g_return_if_fail (GTK_IS_EXPANDER (expander));
g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
g_return_if_fail (label_widget == NULL || gtk_widget_get_parent (label_widget) == NULL);
priv = expander->priv;
if (priv->label_widget == label_widget)
return;
if (priv->label_widget)
{
gtk_box_gadget_remove_widget (GTK_BOX_GADGET (priv->title_gadget), priv->label_widget);
gtk_widget_set_state_flags (priv->label_widget, 0, TRUE);
gtk_widget_unparent (priv->label_widget);
}
priv->label_widget = label_widget;
widget = GTK_WIDGET (expander);
if (label_widget)
{
priv->label_widget = label_widget;
gtk_widget_set_parent (label_widget, widget);
if (priv->prelight)
gtk_widget_set_state_flags (label_widget, GTK_STATE_FLAG_PRELIGHT, FALSE);
pos = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL ? 0 : 1;
gtk_box_gadget_insert_widget (GTK_BOX_GADGET (priv->title_gadget), pos, label_widget);
}
if (gtk_widget_get_visible (widget))
gtk_widget_queue_resize (widget);
g_object_freeze_notify (G_OBJECT (expander));
g_object_notify (G_OBJECT (expander), "label-widget");
g_object_notify (G_OBJECT (expander), "label");
g_object_thaw_notify (G_OBJECT (expander));
}
/**
* gtk_expander_get_label_widget:
* @expander: a #GtkExpander
*
* Retrieves the label widget for the frame. See
* gtk_expander_set_label_widget().
*
* Returns: (nullable) (transfer none): the label widget,
* or %NULL if there is none
*
* Since: 2.4
*/
GtkWidget *
gtk_expander_get_label_widget (GtkExpander *expander)
{
g_return_val_if_fail (GTK_IS_EXPANDER (expander), NULL);
return expander->priv->label_widget;
}
/**
* gtk_expander_set_label_fill:
* @expander: a #GtkExpander
* @label_fill: %TRUE if the label should should fill
* all available horizontal space
*
* Sets whether the label widget should fill all available
* horizontal space allocated to @expander.
*
* Since: 2.22
*/
void
gtk_expander_set_label_fill (GtkExpander *expander,
gboolean label_fill)
{
GtkExpanderPrivate *priv;
g_return_if_fail (GTK_IS_EXPANDER (expander));
priv = expander->priv;
label_fill = label_fill != FALSE;
if (priv->label_fill != label_fill)
{
priv->label_fill = label_fill;
if (priv->label_widget != NULL)
gtk_widget_queue_resize (GTK_WIDGET (expander));
g_object_notify (G_OBJECT (expander), "label-fill");
}
}
/**
* gtk_expander_get_label_fill:
* @expander: a #GtkExpander
*
* Returns whether the label widget will fill all available
* horizontal space allocated to @expander.
*
* Returns: %TRUE if the label widget will fill all
* available horizontal space
*
* Since: 2.22
*/
gboolean
gtk_expander_get_label_fill (GtkExpander *expander)
{
g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
return expander->priv->label_fill;
}
/**
* gtk_expander_set_resize_toplevel:
* @expander: a #GtkExpander
* @resize_toplevel: whether to resize the toplevel
*
* Sets whether the expander will resize the toplevel widget
* containing the expander upon resizing and collpasing.
*
* Since: 3.2
*/
void
gtk_expander_set_resize_toplevel (GtkExpander *expander,
gboolean resize_toplevel)
{
g_return_if_fail (GTK_IS_EXPANDER (expander));
if (expander->priv->resize_toplevel != resize_toplevel)
{
expander->priv->resize_toplevel = resize_toplevel ? TRUE : FALSE;
g_object_notify (G_OBJECT (expander), "resize-toplevel");
}
}
/**
* gtk_expander_get_resize_toplevel:
* @expander: a #GtkExpander
*
* Returns whether the expander will resize the toplevel widget
* containing the expander upon resizing and collpasing.
*
* Returns: the “resize toplevel” setting.
*
* Since: 3.2
*/
gboolean
gtk_expander_get_resize_toplevel (GtkExpander *expander)
{
g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
return expander->priv->resize_toplevel;
}