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gtkexpander.c
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gtkexpander.c
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/* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors:
* Mark McLoughlin <mark@skynet.ie>
*/
/**
* 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.
*
* <refsect2 id="expander-special-usage">
* <title>Special Usage</title>
* <para>
* 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:
* </para>
* <informalexample>
* <programlisting id="expander-callback-example">
* 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 */
* }
* }
* </programlisting>
* </informalexample>
* </refsect2>
* <refsect2 id="GtkExpander-BUILDER-UI">
* <title>GtkExpander as GtkBuildable</title>
* <para>
* The GtkExpander implementation of the GtkBuildable interface
* supports placing a child in the label position by specifying
* "label" as the "type" attribute of a <child> element.
* A normal content child can be specified without specifying
* a <child> type attribute.
* </para>
* <example>
* <title>A UI definition fragment with GtkExpander</title>
* <programlisting><![CDATA[
* <object class="GtkExpander">
* <child type="label">
* <object class="GtkLabel" id="expander-label"/>
* </child>
* <child>
* <object class="GtkEntry" id="expander-content"/>
* </child>
* </object>
* ]]></programlisting>
* </example>
* </refsect2>
*
*/
#include "config.h"
#include <string.h>
#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"
#define DEFAULT_EXPANDER_SIZE 10
#define DEFAULT_EXPANDER_SPACING 2
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;
gint spacing;
guint expand_timer;
guint expanded : 1;
guint use_underline : 1;
guint use_markup : 1;
guint button_down : 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_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_expander_button_release (GtkWidget *widget,
GdkEventButton *event);
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 void gtk_expander_grab_notify (GtkWidget *widget,
gboolean was_grabbed);
static void gtk_expander_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state);
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);
static void get_expander_bounds (GtkExpander *expander,
GdkRectangle *rect);
/* 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);
G_DEFINE_TYPE_WITH_CODE (GtkExpander, gtk_expander, GTK_TYPE_BIN,
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->button_press_event = gtk_expander_button_press;
widget_class->button_release_event = gtk_expander_button_release;
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->grab_notify = gtk_expander_grab_notify;
widget_class->state_flags_changed = gtk_expander_state_flags_changed;
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;
container_class->add = gtk_expander_add;
container_class->remove = gtk_expander_remove;
container_class->forall = gtk_expander_forall;
klass->activate = gtk_expander_activate;
g_type_class_add_private (klass, sizeof (GtkExpanderPrivate));
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_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_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_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_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));
/**
* 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 tolevel"),
P_("Whether the expander will resize the toplevel window upon expanding and collapsing"),
FALSE,
GTK_PARAM_READWRITE));
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));
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));
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,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_EXPANDER_ACCESSIBLE);
}
static void
gtk_expander_init (GtkExpander *expander)
{
GtkExpanderPrivate *priv;
expander->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (expander,
GTK_TYPE_EXPANDER,
GtkExpanderPrivate);
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->button_down = FALSE;
priv->prelight = FALSE;
priv->label_fill = FALSE;
priv->expand_timer = 0;
priv->resize_toplevel = 0;
gtk_drag_dest_set (GTK_WIDGET (expander), 0, NULL, 0, 0);
gtk_drag_dest_set_track_motion (GTK_WIDGET (expander), TRUE);
}
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;
}
GTK_WIDGET_CLASS (gtk_expander_parent_class)->destroy (widget);
}
static void
gtk_expander_realize (GtkWidget *widget)
{
GtkAllocation allocation;
GtkExpanderPrivate *priv;
GdkWindow *window;
GdkWindowAttr attributes;
gint attributes_mask;
gint border_width;
GdkRectangle expander_rect;
gint label_height;
priv = GTK_EXPANDER (widget)->priv;
gtk_widget_set_realized (widget, TRUE);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
get_expander_bounds (GTK_EXPANDER (widget), &expander_rect);
if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
{
GtkRequisition label_requisition;
gtk_widget_get_preferred_size (priv->label_widget,
&label_requisition, NULL);
label_height = label_requisition.height;
}
else
label_height = 0;
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x + border_width;
attributes.y = allocation.y + border_width;
attributes.width = MAX (allocation.width - 2 * border_width, 1);
attributes.height = MAX (expander_rect.height, label_height - 2 * border_width);
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);
gdk_window_set_user_data (priv->event_window, widget);
}
static void
gtk_expander_unrealize (GtkWidget *widget)
{
GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
if (priv->event_window)
{
gdk_window_set_user_data (priv->event_window, NULL);
gdk_window_destroy (priv->event_window);
priv->event_window = NULL;
}
GTK_WIDGET_CLASS (gtk_expander_parent_class)->unrealize (widget);
}
static void
get_expander_bounds (GtkExpander *expander,
GdkRectangle *rect)
{
GtkAllocation allocation;
GtkWidget *widget;
GtkExpanderPrivate *priv;
gint border_width;
gint expander_size;
gint expander_spacing;
gboolean interior_focus;
gint focus_width;
gint focus_pad;
gboolean ltr;
widget = GTK_WIDGET (expander);
priv = expander->priv;
gtk_widget_get_allocation (widget, &allocation);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
gtk_widget_style_get (widget,
"interior-focus", &interior_focus,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
"expander-size", &expander_size,
"expander-spacing", &expander_spacing,
NULL);
ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
rect->x = allocation.x + border_width;
rect->y = allocation.y + border_width;
if (ltr)
rect->x += expander_spacing;
else
rect->x += allocation.width - 2 * border_width -
expander_spacing - expander_size;
if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
{
GtkAllocation label_allocation;
gtk_widget_get_allocation (priv->label_widget, &label_allocation);
if (expander_size < label_allocation.height)
rect->y += focus_width + focus_pad + (label_allocation.height - expander_size) / 2;
else
rect->y += expander_spacing;
}
else
{
rect->y += expander_spacing;
}
if (!interior_focus)
{
if (ltr)
rect->x += focus_width + focus_pad;
else
rect->x -= focus_width + focus_pad;
rect->y += focus_width + focus_pad;
}
rect->width = rect->height = expander_size;
}
static void
gtk_expander_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkExpander *expander;
GtkWidget *child;
GtkExpanderPrivate *priv;
gboolean child_visible = FALSE;
guint border_width;
gint expander_size;
gint expander_spacing;
gboolean interior_focus;
gint focus_width;
gint focus_pad;
gint label_height, top_min_height;
gint label_xpad, label_xoffset;
gint child_ypad, child_yoffset;
expander = GTK_EXPANDER (widget);
child = gtk_bin_get_child (GTK_BIN (widget));
priv = expander->priv;
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
gtk_widget_set_allocation (widget, allocation);
gtk_widget_style_get (widget,
"interior-focus", &interior_focus,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
"expander-size", &expander_size,
"expander-spacing", &expander_spacing,
NULL);
/* Calculate some offsets/padding first */
label_xoffset = border_width + expander_size + focus_width + 2 * expander_spacing + focus_pad;
label_xpad = 2 * border_width + expander_size + 2 * focus_width + 2 * expander_spacing + 2 * focus_pad;
child_yoffset = border_width + priv->spacing + (interior_focus ? 0 : 2 * focus_width + 2 * focus_pad);
child_ypad = 2 * border_width + priv->spacing + (interior_focus ? 0 : 2 * focus_width + 2 * focus_pad);
top_min_height = 2 * expander_spacing + expander_size;
child_visible = (child && gtk_widget_get_child_visible (child));
if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
{
GtkAllocation label_allocation;
gint natural_label_width;
gboolean ltr;
gtk_widget_get_preferred_width (priv->label_widget, NULL, &natural_label_width);
if (priv->label_fill)
label_allocation.width = allocation->width - label_xpad;
else
label_allocation.width = MIN (natural_label_width, allocation->width - label_xpad);
label_allocation.width = MAX (label_allocation.width, 1);
/* We distribute the minimum height to the label widget and prioritize
* the child widget giving it the remaining height
*/
gtk_widget_get_preferred_height_for_width (priv->label_widget,
label_allocation.width, &label_height, NULL);
ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
if (priv->label_fill)
label_allocation.x = allocation->x + label_xoffset;
else if (ltr)
label_allocation.x = allocation->x + label_xoffset;
else
label_allocation.x = allocation->x + allocation->width -
(label_allocation.width + label_xoffset);
label_allocation.y = allocation->y + border_width + focus_width + focus_pad;
label_allocation.height = MIN (label_height,
allocation->height - 2 * border_width -
2 * focus_width - 2 * focus_pad -
(child_visible ? priv->spacing : 0));
label_allocation.height = MAX (label_allocation.height, 1);
gtk_widget_size_allocate (priv->label_widget, &label_allocation);
label_height = label_allocation.height;
}
else
{
label_height = 0;
}
if (gtk_widget_get_realized (widget))
{
GdkRectangle rect;
get_expander_bounds (expander, &rect);
gdk_window_move_resize (priv->event_window,
allocation->x + border_width,
allocation->y + border_width,
MAX (allocation->width - 2 * border_width, 1),
MAX (rect.height, label_height - 2 * border_width));
}
if (child_visible)
{
GtkAllocation child_allocation;
gint top_height;
top_height = MAX (top_min_height,
label_height + (interior_focus ? 2 * focus_width + 2 * focus_pad : 0));
child_allocation.x = allocation->x + border_width;
child_allocation.y = allocation->y + top_height + child_yoffset;
child_allocation.width = MAX (allocation->width - 2 * border_width, 1);
child_allocation.height = allocation->height - top_height - child_ypad;
child_allocation.height = MAX (child_allocation.height, 1);
gtk_widget_size_allocate (child, &child_allocation);
}
}
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 void
gtk_expander_paint_prelight (GtkExpander *expander,
cairo_t *cr)
{
GtkAllocation allocation;
GtkWidget *widget;
GtkContainer *container;
GtkExpanderPrivate *priv;
GdkRectangle area;
GtkStyleContext *context;
gboolean interior_focus;
int focus_width;
int focus_pad;
int expander_size;
int expander_spacing;
guint border_width;
priv = expander->priv;
widget = GTK_WIDGET (expander);
container = GTK_CONTAINER (expander);
gtk_widget_style_get (widget,
"interior-focus", &interior_focus,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
"expander-size", &expander_size,
"expander-spacing", &expander_spacing,
NULL);
gtk_widget_get_allocation (widget, &allocation);
border_width = gtk_container_get_border_width (container);
area.x = border_width;
area.y = border_width;
area.width = allocation.width - (2 * border_width);
if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
{
GtkAllocation label_widget_allocation;
gtk_widget_get_allocation (priv->label_widget, &label_widget_allocation);
area.height = label_widget_allocation.height;
}
else
area.height = 0;
area.height += interior_focus ? (focus_width + focus_pad) * 2 : 0;
area.height = MAX (area.height, expander_size + 2 * expander_spacing);
area.height += !interior_focus ? (focus_width + focus_pad) * 2 : 0;
context = gtk_widget_get_style_context (widget);
gtk_render_background (context, cr,
area.x, area.y,
area.width, area.height);
}
static void
gtk_expander_paint (GtkExpander *expander,
cairo_t *cr)
{
GtkExpanderPrivate *priv = expander->priv;
GtkWidget *widget;
GdkRectangle clip;
GtkAllocation allocation;
GtkStyleContext *context;
GtkStateFlags state = 0;
gint size;
widget = GTK_WIDGET (expander);
context = gtk_widget_get_style_context (widget);
get_expander_bounds (expander, &clip);
gtk_widget_get_allocation (widget, &allocation);
gtk_style_context_save (context);
if (expander->priv->prelight)
{
state = GTK_STATE_FLAG_PRELIGHT;
gtk_style_context_set_state (context, state);
gtk_expander_paint_prelight (expander, cr);
}
gtk_widget_style_get (widget, "expander-size", &size, NULL);
state = gtk_style_context_get_state (context);
/* Set active flag as per the expanded state */
if (priv->expanded)
state |= GTK_STATE_FLAG_ACTIVE;
gtk_style_context_set_state (context, state);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_EXPANDER);
/* The expander is the only animatable region */
gtk_style_context_push_animatable_region (context, GUINT_TO_POINTER (1));
gtk_render_expander (context, cr,
clip.x - allocation.x,
clip.y - allocation.y,
size, size);
gtk_style_context_pop_animatable_region (context);
gtk_style_context_restore (context);
}
static void
gtk_expander_paint_focus (GtkExpander *expander,
cairo_t *cr)
{
GtkWidget *widget;
GtkExpanderPrivate *priv;
GdkRectangle rect;
GtkStyleContext *context;
gint x, y, width, height;
gboolean interior_focus;
gint border_width;
gint focus_width;
gint focus_pad;
gint expander_size;
gint expander_spacing;
gboolean ltr;
GtkAllocation allocation;
widget = GTK_WIDGET (expander);
priv = expander->priv;
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
gtk_widget_get_allocation (widget, &allocation);
gtk_widget_style_get (widget,
"interior-focus", &interior_focus,
"focus-line-width", &focus_width,
"focus-padding", &focus_pad,
"expander-size", &expander_size,
"expander-spacing", &expander_spacing,
NULL);
ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
width = height = 0;
if (priv->label_widget)
{
if (gtk_widget_get_visible (priv->label_widget))
{
GtkAllocation label_allocation;
gtk_widget_get_allocation (priv->label_widget, &label_allocation);
width = label_allocation.width;
height = label_allocation.height;
}
width += 2 * focus_pad + 2 * focus_width;
height += 2 * focus_pad + 2 * focus_width;
x = border_width;
y = border_width;
if (ltr)
{
if (interior_focus)
x += expander_spacing * 2 + expander_size;
}
else
{
x += allocation.width - 2 * border_width
- expander_spacing * 2 - expander_size - width;
}
if (!interior_focus)
{
width += expander_size + 2 * expander_spacing;
height = MAX (height, expander_size + 2 * expander_spacing);
}
}
else
{
get_expander_bounds (expander, &rect);
x = rect.x - allocation.x - focus_pad;