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gtk2/gtk/gtkpaned.c
Benjamin Otte 6e3b4af3c5 paned: Move showing of the handle from realize() to map() 
Also only show the paned if it's actually supposed to be visible.
2011-04-28 22:21:45 +02:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gtkpaned.h"
#include "gtkbindings.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkorientable.h"
#include "gtkwindow.h"
#include "gtktypebuiltins.h"
#include "gtkprivate.h"
#include "gtkintl.h"
/**
* SECTION:gtkpaned
* @Short_description: Base class for widgets with two adjustable panes
* @Title: GtkPaned
*
* #GtkPaned is the base class for widgets with two panes, arranged either
* horizontally (#GtkHPaned) or vertically (#GtkVPaned). Child widgets are
* added to the panes of the widget with gtk_paned_pack1() and
* gtk_paned_pack2(). The division between the two children is set by default
* from the size requests of the children, but it can be adjusted by the
* user.
*
* A paned widget draws a separator between the two child widgets and a
* small handle that the user can drag to adjust the division. It does not
* draw any relief around the children or around the separator. (The space
* in which the separator is called the gutter.) Often, it is useful to put
* each child inside a #GtkFrame with the shadow type set to %GTK_SHADOW_IN
* so that the gutter appears as a ridge. No separator is drawn if one of
* the children is missing.
*
* Each child has two options that can be set, @resize and @shrink. If
* @resize is true, then when the #GtkPaned is resized, that child will
* expand or shrink along with the paned widget. If @shrink is true, then
* that child can be made smaller than its requisition by the user.
* Setting @shrink to %FALSE allows the application to set a minimum size.
* If @resize is false for both children, then this is treated as if
* @resize is true for both children.
*
* The application can set the position of the slider as if it were set
* by the user, by calling gtk_paned_set_position().
*
* <example>
* <title>Creating a paned widget with minimum sizes.</title>
* <programlisting>
* GtkWidget *hpaned = gtk_paned_new (GTK_ORIENTATION_HORIZONTAL);
* GtkWidget *frame1 = gtk_frame_new (NULL);
* GtkWidget *frame2 = gtk_frame_new (NULL);
* gtk_frame_set_shadow_type (GTK_FRAME (frame1), GTK_SHADOW_IN);
* gtk_frame_set_shadow_type (GTK_FRAME (frame2), GTK_SHADOW_IN);
*
* gtk_widget_set_size_request (hpaned, 200, -1);
*
* gtk_paned_pack1 (GTK_PANED (hpaned), frame1, TRUE, FALSE);
* gtk_widget_set_size_request (frame1, 50, -1);
*
* gtk_paned_pack2 (GTK_PANED (hpaned), frame2, FALSE, FALSE);
* gtk_widget_set_size_request (frame2, 50, -1);
* </programlisting>
* </example>
*/
struct _GtkPanedPrivate
{
GtkPaned *first_paned;
GtkWidget *child1;
GtkWidget *child2;
GtkWidget *last_child1_focus;
GtkWidget *last_child2_focus;
GtkWidget *saved_focus;
GtkOrientation orientation;
GdkCursorType cursor_type;
GdkDevice *grab_device;
GdkRectangle handle_pos;
GdkWindow *handle;
gint child1_size;
gint drag_pos;
gint last_allocation;
gint max_position;
gint min_position;
gint original_position;
guint32 grab_time;
guint handle_prelit : 1;
guint in_drag : 1;
guint in_recursion : 1;
guint child1_resize : 1;
guint child1_shrink : 1;
guint child2_resize : 1;
guint child2_shrink : 1;
guint position_set : 1;
};
enum {
PROP_0,
PROP_ORIENTATION,
PROP_POSITION,
PROP_POSITION_SET,
PROP_MIN_POSITION,
PROP_MAX_POSITION
};
enum {
CHILD_PROP_0,
CHILD_PROP_RESIZE,
CHILD_PROP_SHRINK
};
enum {
CYCLE_CHILD_FOCUS,
TOGGLE_HANDLE_FOCUS,
MOVE_HANDLE,
CYCLE_HANDLE_FOCUS,
ACCEPT_POSITION,
CANCEL_POSITION,
LAST_SIGNAL
};
static void gtk_paned_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_paned_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_paned_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_paned_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gtk_paned_finalize (GObject *object);
static void gtk_paned_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_paned_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_paned_get_preferred_width_for_height
(GtkWidget *widget,
gint height,
gint *minimum,
gint *natural);
static void gtk_paned_get_preferred_height_for_width
(GtkWidget *widget,
gint width,
gint *minimum,
gint *natural);
static void gtk_paned_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_paned_realize (GtkWidget *widget);
static void gtk_paned_unrealize (GtkWidget *widget);
static void gtk_paned_map (GtkWidget *widget);
static void gtk_paned_unmap (GtkWidget *widget);
static void gtk_paned_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state);
static gboolean gtk_paned_draw (GtkWidget *widget,
cairo_t *cr);
static gboolean gtk_paned_enter (GtkWidget *widget,
GdkEventCrossing *event);
static gboolean gtk_paned_leave (GtkWidget *widget,
GdkEventCrossing *event);
static gboolean gtk_paned_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_paned_button_release (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_paned_motion (GtkWidget *widget,
GdkEventMotion *event);
static gboolean gtk_paned_focus (GtkWidget *widget,
GtkDirectionType direction);
static gboolean gtk_paned_grab_broken (GtkWidget *widget,
GdkEventGrabBroken *event);
static void gtk_paned_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_paned_remove (GtkContainer *container,
GtkWidget *widget);
static void gtk_paned_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
static void gtk_paned_calc_position (GtkPaned *paned,
gint allocation,
gint child1_req,
gint child2_req);
static void gtk_paned_set_focus_child (GtkContainer *container,
GtkWidget *child);
static void gtk_paned_set_saved_focus (GtkPaned *paned,
GtkWidget *widget);
static void gtk_paned_set_first_paned (GtkPaned *paned,
GtkPaned *first_paned);
static void gtk_paned_set_last_child1_focus (GtkPaned *paned,
GtkWidget *widget);
static void gtk_paned_set_last_child2_focus (GtkPaned *paned,
GtkWidget *widget);
static gboolean gtk_paned_cycle_child_focus (GtkPaned *paned,
gboolean reverse);
static gboolean gtk_paned_cycle_handle_focus (GtkPaned *paned,
gboolean reverse);
static gboolean gtk_paned_move_handle (GtkPaned *paned,
GtkScrollType scroll);
static gboolean gtk_paned_accept_position (GtkPaned *paned);
static gboolean gtk_paned_cancel_position (GtkPaned *paned);
static gboolean gtk_paned_toggle_handle_focus (GtkPaned *paned);
static GType gtk_paned_child_type (GtkContainer *container);
static void gtk_paned_grab_notify (GtkWidget *widget,
gboolean was_grabbed);
G_DEFINE_TYPE_WITH_CODE (GtkPaned, gtk_paned, GTK_TYPE_CONTAINER,
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
NULL))
static guint signals[LAST_SIGNAL] = { 0 };
static void
add_tab_bindings (GtkBindingSet *binding_set,
GdkModifierType modifiers)
{
gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, modifiers,
"toggle-handle-focus", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, modifiers,
"toggle-handle-focus", 0);
}
static void
add_move_binding (GtkBindingSet *binding_set,
guint keyval,
GdkModifierType mask,
GtkScrollType scroll)
{
gtk_binding_entry_add_signal (binding_set, keyval, mask,
"move-handle", 1,
GTK_TYPE_SCROLL_TYPE, scroll);
}
static void
gtk_paned_class_init (GtkPanedClass *class)
{
GObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
GtkPanedClass *paned_class;
GtkBindingSet *binding_set;
object_class = (GObjectClass *) class;
widget_class = (GtkWidgetClass *) class;
container_class = (GtkContainerClass *) class;
paned_class = (GtkPanedClass *) class;
object_class->set_property = gtk_paned_set_property;
object_class->get_property = gtk_paned_get_property;
object_class->finalize = gtk_paned_finalize;
widget_class->get_preferred_width = gtk_paned_get_preferred_width;
widget_class->get_preferred_height = gtk_paned_get_preferred_height;
widget_class->get_preferred_width_for_height = gtk_paned_get_preferred_width_for_height;
widget_class->get_preferred_height_for_width = gtk_paned_get_preferred_height_for_width;
widget_class->size_allocate = gtk_paned_size_allocate;
widget_class->realize = gtk_paned_realize;
widget_class->unrealize = gtk_paned_unrealize;
widget_class->map = gtk_paned_map;
widget_class->unmap = gtk_paned_unmap;
widget_class->draw = gtk_paned_draw;
widget_class->focus = gtk_paned_focus;
widget_class->enter_notify_event = gtk_paned_enter;
widget_class->leave_notify_event = gtk_paned_leave;
widget_class->button_press_event = gtk_paned_button_press;
widget_class->button_release_event = gtk_paned_button_release;
widget_class->motion_notify_event = gtk_paned_motion;
widget_class->grab_broken_event = gtk_paned_grab_broken;
widget_class->grab_notify = gtk_paned_grab_notify;
widget_class->state_flags_changed = gtk_paned_state_flags_changed;
container_class->add = gtk_paned_add;
container_class->remove = gtk_paned_remove;
container_class->forall = gtk_paned_forall;
container_class->child_type = gtk_paned_child_type;
container_class->set_focus_child = gtk_paned_set_focus_child;
container_class->set_child_property = gtk_paned_set_child_property;
container_class->get_child_property = gtk_paned_get_child_property;
gtk_container_class_handle_border_width (container_class);
paned_class->cycle_child_focus = gtk_paned_cycle_child_focus;
paned_class->toggle_handle_focus = gtk_paned_toggle_handle_focus;
paned_class->move_handle = gtk_paned_move_handle;
paned_class->cycle_handle_focus = gtk_paned_cycle_handle_focus;
paned_class->accept_position = gtk_paned_accept_position;
paned_class->cancel_position = gtk_paned_cancel_position;
g_object_class_override_property (object_class,
PROP_ORIENTATION,
"orientation");
g_object_class_install_property (object_class,
PROP_POSITION,
g_param_spec_int ("position",
P_("Position"),
P_("Position of paned separator in pixels (0 means all the way to the left/top)"),
0,
G_MAXINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_POSITION_SET,
g_param_spec_boolean ("position-set",
P_("Position Set"),
P_("TRUE if the Position property should be used"),
FALSE,
GTK_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("handle-size",
P_("Handle Size"),
P_("Width of handle"),
0,
G_MAXINT,
5,
GTK_PARAM_READABLE));
/**
* GtkPaned:min-position:
*
* The smallest possible value for the position property. This property is derived from the
* size and shrinkability of the widget's children.
*
* Since: 2.4
*/
g_object_class_install_property (object_class,
PROP_MIN_POSITION,
g_param_spec_int ("min-position",
P_("Minimal Position"),
P_("Smallest possible value for the \"position\" property"),
0,
G_MAXINT,
0,
GTK_PARAM_READABLE));
/**
* GtkPaned:max-position:
*
* The largest possible value for the position property. This property is derived from the
* size and shrinkability of the widget's children.
*
* Since: 2.4
*/
g_object_class_install_property (object_class,
PROP_MAX_POSITION,
g_param_spec_int ("max-position",
P_("Maximal Position"),
P_("Largest possible value for the \"position\" property"),
0,
G_MAXINT,
G_MAXINT,
GTK_PARAM_READABLE));
/**
* GtkPaned:resize:
*
* The "resize" child property determines whether the child expands and
* shrinks along with the paned widget.
*
* Since: 2.4
*/
gtk_container_class_install_child_property (container_class,
CHILD_PROP_RESIZE,
g_param_spec_boolean ("resize",
P_("Resize"),
P_("If TRUE, the child expands and shrinks along with the paned widget"),
TRUE,
GTK_PARAM_READWRITE));
/**
* GtkPaned:shrink:
*
* The "shrink" child property determines whether the child can be made
* smaller than its requisition.
*
* Since: 2.4
*/
gtk_container_class_install_child_property (container_class,
CHILD_PROP_SHRINK,
g_param_spec_boolean ("shrink",
P_("Shrink"),
P_("If TRUE, the child can be made smaller than its requisition"),
TRUE,
GTK_PARAM_READWRITE));
/**
* GtkPaned::cycle-child-focus:
* @widget: the object that received the signal
* @reversed: whether cycling backward or forward
*
* The ::cycle-child-focus signal is a
* <link linkend="keybinding-signals">keybinding signal</link>
* which gets emitted to cycle the focus between the children of the paned.
*
* The default binding is f6.
*
* Since: 2.0
*/
signals [CYCLE_CHILD_FOCUS] =
g_signal_new (I_("cycle-child-focus"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkPanedClass, cycle_child_focus),
NULL, NULL,
_gtk_marshal_BOOLEAN__BOOLEAN,
G_TYPE_BOOLEAN, 1,
G_TYPE_BOOLEAN);
/**
* GtkPaned::toggle-handle-focus:
* @widget: the object that received the signal
*
* The ::toggle-handle-focus is a
* <link linkend="keybinding-signals">keybinding signal</link>
* which gets emitted to accept the current position of the handle and then
* move focus to the next widget in the focus chain.
*
* The default binding is Tab.
*
* Since: 2.0
*/
signals [TOGGLE_HANDLE_FOCUS] =
g_signal_new (I_("toggle-handle-focus"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkPanedClass, toggle_handle_focus),
NULL, NULL,
_gtk_marshal_BOOLEAN__VOID,
G_TYPE_BOOLEAN, 0);
/**
* GtkPaned::move-handle:
* @widget: the object that received the signal
* @scroll_type: a #GtkScrollType
*
* The ::move-handle signal is a
* <link linkend="keybinding-signals">keybinding signal</link>
* which gets emitted to move the handle when the user is using key bindings
* to move it.
*
* Since: 2.0
*/
signals[MOVE_HANDLE] =
g_signal_new (I_("move-handle"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkPanedClass, move_handle),
NULL, NULL,
_gtk_marshal_BOOLEAN__ENUM,
G_TYPE_BOOLEAN, 1,
GTK_TYPE_SCROLL_TYPE);
/**
* GtkPaned::cycle-handle-focus:
* @widget: the object that received the signal
* @reversed: whether cycling backward or forward
*
* The ::cycle-handle-focus signal is a
* <link linkend="keybinding-signals">keybinding signal</link>
* which gets emitted to cycle whether the paned should grab focus to allow
* the user to change position of the handle by using key bindings.
*
* The default binding for this signal is f8.
*
* Since: 2.0
*/
signals [CYCLE_HANDLE_FOCUS] =
g_signal_new (I_("cycle-handle-focus"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkPanedClass, cycle_handle_focus),
NULL, NULL,
_gtk_marshal_BOOLEAN__BOOLEAN,
G_TYPE_BOOLEAN, 1,
G_TYPE_BOOLEAN);
/**
* GtkPaned::accept-position:
* @widget: the object that received the signal
*
* The ::accept-position signal is a
* <link linkend="keybinding-signals">keybinding signal</link>
* which gets emitted to accept the current position of the handle when
* moving it using key bindings.
*
* The default binding for this signal is Return or Space.
*
* Since: 2.0
*/
signals [ACCEPT_POSITION] =
g_signal_new (I_("accept-position"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkPanedClass, accept_position),
NULL, NULL,
_gtk_marshal_BOOLEAN__VOID,
G_TYPE_BOOLEAN, 0);
/**
* GtkPaned::cancel-position:
* @widget: the object that received the signal
*
* The ::cancel-position signal is a
* <link linkend="keybinding-signals">keybinding signal</link>
* which gets emitted to cancel moving the position of the handle using key
* bindings. The position of the handle will be reset to the value prior to
* moving it.
*
* The default binding for this signal is Escape.
*
* Since: 2.0
*/
signals [CANCEL_POSITION] =
g_signal_new (I_("cancel-position"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkPanedClass, cancel_position),
NULL, NULL,
_gtk_marshal_BOOLEAN__VOID,
G_TYPE_BOOLEAN, 0);
binding_set = gtk_binding_set_by_class (class);
/* F6 and friends */
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_F6, 0,
"cycle-child-focus", 1,
G_TYPE_BOOLEAN, FALSE);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_F6, GDK_SHIFT_MASK,
"cycle-child-focus", 1,
G_TYPE_BOOLEAN, TRUE);
/* F8 and friends */
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_F8, 0,
"cycle-handle-focus", 1,
G_TYPE_BOOLEAN, FALSE);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_F8, GDK_SHIFT_MASK,
"cycle-handle-focus", 1,
G_TYPE_BOOLEAN, TRUE);
add_tab_bindings (binding_set, 0);
add_tab_bindings (binding_set, GDK_CONTROL_MASK);
add_tab_bindings (binding_set, GDK_SHIFT_MASK);
add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK);
/* accept and cancel positions */
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Escape, 0,
"cancel-position", 0);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_Return, 0,
"accept-position", 0);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_ISO_Enter, 0,
"accept-position", 0);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Enter, 0,
"accept-position", 0);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_space, 0,
"accept-position", 0);
gtk_binding_entry_add_signal (binding_set,
GDK_KEY_KP_Space, 0,
"accept-position", 0);
/* move handle */
add_move_binding (binding_set, GDK_KEY_Left, 0, GTK_SCROLL_STEP_LEFT);
add_move_binding (binding_set, GDK_KEY_KP_Left, 0, GTK_SCROLL_STEP_LEFT);
add_move_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
add_move_binding (binding_set, GDK_KEY_KP_Left, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_LEFT);
add_move_binding (binding_set, GDK_KEY_Right, 0, GTK_SCROLL_STEP_RIGHT);
add_move_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
add_move_binding (binding_set, GDK_KEY_KP_Right, 0, GTK_SCROLL_STEP_RIGHT);
add_move_binding (binding_set, GDK_KEY_KP_Right, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_RIGHT);
add_move_binding (binding_set, GDK_KEY_Up, 0, GTK_SCROLL_STEP_UP);
add_move_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
add_move_binding (binding_set, GDK_KEY_KP_Up, 0, GTK_SCROLL_STEP_UP);
add_move_binding (binding_set, GDK_KEY_KP_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_UP);
add_move_binding (binding_set, GDK_KEY_Page_Up, 0, GTK_SCROLL_PAGE_UP);
add_move_binding (binding_set, GDK_KEY_KP_Page_Up, 0, GTK_SCROLL_PAGE_UP);
add_move_binding (binding_set, GDK_KEY_Down, 0, GTK_SCROLL_STEP_DOWN);
add_move_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
add_move_binding (binding_set, GDK_KEY_KP_Down, 0, GTK_SCROLL_STEP_DOWN);
add_move_binding (binding_set, GDK_KEY_KP_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_DOWN);
add_move_binding (binding_set, GDK_KEY_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
add_move_binding (binding_set, GDK_KEY_KP_Page_Down, 0, GTK_SCROLL_PAGE_RIGHT);
add_move_binding (binding_set, GDK_KEY_Home, 0, GTK_SCROLL_START);
add_move_binding (binding_set, GDK_KEY_KP_Home, 0, GTK_SCROLL_START);
add_move_binding (binding_set, GDK_KEY_End, 0, GTK_SCROLL_END);
add_move_binding (binding_set, GDK_KEY_KP_End, 0, GTK_SCROLL_END);
g_type_class_add_private (object_class, sizeof (GtkPanedPrivate));
}
static GType
gtk_paned_child_type (GtkContainer *container)
{
GtkPaned *paned = GTK_PANED (container);
GtkPanedPrivate *priv = paned->priv;
if (!priv->child1 || !priv->child2)
return GTK_TYPE_WIDGET;
else
return G_TYPE_NONE;
}
static void
gtk_paned_init (GtkPaned *paned)
{
GtkPanedPrivate *priv;
gtk_widget_set_has_window (GTK_WIDGET (paned), FALSE);
gtk_widget_set_can_focus (GTK_WIDGET (paned), TRUE);
/* We only need to redraw when the handle position moves, which is
* independent of the overall allocation of the GtkPaned
*/
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (paned), FALSE);
paned->priv = G_TYPE_INSTANCE_GET_PRIVATE (paned, GTK_TYPE_PANED, GtkPanedPrivate);
priv = paned->priv;
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->cursor_type = GDK_SB_H_DOUBLE_ARROW;
priv->child1 = NULL;
priv->child2 = NULL;
priv->handle = NULL;
priv->cursor_type = GDK_CROSS;
priv->handle_pos.width = 5;
priv->handle_pos.height = 5;
priv->position_set = FALSE;
priv->last_allocation = -1;
priv->in_drag = FALSE;
priv->last_child1_focus = NULL;
priv->last_child2_focus = NULL;
priv->in_recursion = FALSE;
priv->handle_prelit = FALSE;
priv->original_position = -1;
priv->handle_pos.x = -1;
priv->handle_pos.y = -1;
priv->drag_pos = -1;
}
static void
gtk_paned_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkPaned *paned = GTK_PANED (object);
GtkPanedPrivate *priv = paned->priv;
switch (prop_id)
{
case PROP_ORIENTATION:
priv->orientation = g_value_get_enum (value);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
priv->cursor_type = GDK_SB_H_DOUBLE_ARROW;
else
priv->cursor_type = GDK_SB_V_DOUBLE_ARROW;
/* state_flags_changed updates the cursor */
gtk_paned_state_flags_changed (GTK_WIDGET (paned), 0);
gtk_widget_queue_resize (GTK_WIDGET (paned));
break;
case PROP_POSITION:
gtk_paned_set_position (paned, g_value_get_int (value));
break;
case PROP_POSITION_SET:
priv->position_set = g_value_get_boolean (value);
gtk_widget_queue_resize_no_redraw (GTK_WIDGET (paned));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_paned_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkPaned *paned = GTK_PANED (object);
GtkPanedPrivate *priv = paned->priv;
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_POSITION:
g_value_set_int (value, priv->child1_size);
break;
case PROP_POSITION_SET:
g_value_set_boolean (value, priv->position_set);
break;
case PROP_MIN_POSITION:
g_value_set_int (value, priv->min_position);
break;
case PROP_MAX_POSITION:
g_value_set_int (value, priv->max_position);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_paned_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkPaned *paned = GTK_PANED (container);
GtkPanedPrivate *priv = paned->priv;
gboolean old_value, new_value;
g_assert (child == priv->child1 || child == priv->child2);
new_value = g_value_get_boolean (value);
switch (property_id)
{
case CHILD_PROP_RESIZE:
if (child == priv->child1)
{
old_value = priv->child1_resize;
priv->child1_resize = new_value;
}
else
{
old_value = priv->child2_resize;
priv->child2_resize = new_value;
}
break;
case CHILD_PROP_SHRINK:
if (child == priv->child1)
{
old_value = priv->child1_shrink;
priv->child1_shrink = new_value;
}
else
{
old_value = priv->child2_shrink;
priv->child2_shrink = new_value;
}
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
old_value = -1; /* quiet gcc */
break;
}
if (old_value != new_value)
gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
}
static void
gtk_paned_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkPaned *paned = GTK_PANED (container);
GtkPanedPrivate *priv = paned->priv;
g_assert (child == priv->child1 || child == priv->child2);
switch (property_id)
{
case CHILD_PROP_RESIZE:
if (child == priv->child1)
g_value_set_boolean (value, priv->child1_resize);
else
g_value_set_boolean (value, priv->child2_resize);
break;
case CHILD_PROP_SHRINK:
if (child == priv->child1)
g_value_set_boolean (value, priv->child1_shrink);
else
g_value_set_boolean (value, priv->child2_shrink);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_paned_finalize (GObject *object)
{
GtkPaned *paned = GTK_PANED (object);
gtk_paned_set_saved_focus (paned, NULL);
gtk_paned_set_first_paned (paned, NULL);
G_OBJECT_CLASS (gtk_paned_parent_class)->finalize (object);
}
static void
get_preferred_size_for_size (GtkWidget *widget,
GtkOrientation orientation,
gint size,
gint *minimum,
gint *natural)
{
if (orientation == GTK_ORIENTATION_HORIZONTAL)
if (size < 0)
gtk_widget_get_preferred_width (widget, minimum, natural);
else
gtk_widget_get_preferred_width_for_height (widget, size, minimum, natural);
else
if (size < 0)
gtk_widget_get_preferred_height (widget, minimum, natural);
else
gtk_widget_get_preferred_height_for_width (widget, size, minimum, natural);
}
static void
gtk_paned_get_preferred_size (GtkWidget *widget,
GtkOrientation orientation,
gint size,
gint *minimum,
gint *natural)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
gint child_min, child_nat;
*minimum = *natural = 0;
if (priv->child1 && gtk_widget_get_visible (priv->child1))
{
get_preferred_size_for_size (priv->child1, orientation, size, &child_min, &child_nat);
*minimum = child_min;
*natural = child_nat;
}
if (priv->child2 && gtk_widget_get_visible (priv->child2))
{
get_preferred_size_for_size (priv->child2, orientation, size, &child_min, &child_nat);
if (priv->orientation == orientation)
{
*minimum += child_min;
*natural += child_nat;
}
else
{
*minimum = MAX (*minimum, child_min);
*natural = MAX (*natural, child_nat);
}
}
if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
priv->child2 && gtk_widget_get_visible (priv->child2))
{
gint handle_size;
gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
if (priv->orientation == orientation)
{
*minimum += handle_size;
*natural += handle_size;
}
}
}
static void
gtk_paned_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gtk_paned_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, -1, minimum, natural);
}
static void
gtk_paned_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gtk_paned_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, -1, minimum, natural);
}
static void
gtk_paned_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum,
gint *natural)
{
gtk_paned_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, height, minimum, natural);
}
static void
gtk_paned_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum,
gint *natural)
{
gtk_paned_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, width, minimum, natural);
}
static void
flip_child (GtkWidget *widget,
GtkAllocation *child_pos)
{
GtkAllocation allocation;
gint x, width;
gtk_widget_get_allocation (widget, &allocation);
x = allocation.x;
width = allocation.width;
child_pos->x = 2 * x + width - child_pos->x - child_pos->width;
}
static void
gtk_paned_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
gtk_widget_set_allocation (widget, allocation);
if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
priv->child2 && gtk_widget_get_visible (priv->child2))
{
GtkAllocation child1_allocation;
GtkAllocation child2_allocation;
GtkAllocation priv_child1_allocation;
GdkRectangle old_handle_pos;
gint handle_size;
gtk_widget_style_get (widget, "handle-size", &handle_size, NULL);
old_handle_pos = priv->handle_pos;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gint child1_width, child2_width;
gtk_widget_get_preferred_width_for_height (priv->child1,
allocation->height,
&child1_width, NULL);
gtk_widget_get_preferred_width_for_height (priv->child2,
allocation->height,
&child2_width, NULL);
gtk_paned_calc_position (paned,
MAX (1, allocation->width - handle_size),
child1_width,
child2_width);
priv->handle_pos.x = allocation->x + priv->child1_size;
priv->handle_pos.y = allocation->y;
priv->handle_pos.width = handle_size;
priv->handle_pos.height = allocation->height;
child1_allocation.height = child2_allocation.height = allocation->height;
child1_allocation.width = MAX (1, priv->child1_size);
child1_allocation.x = allocation->x;
child1_allocation.y = child2_allocation.y = allocation->y;
child2_allocation.x = child1_allocation.x + priv->child1_size + priv->handle_pos.width;
child2_allocation.width = MAX (1, allocation->x + allocation->width - child2_allocation.x);
if (gtk_widget_get_direction (GTK_WIDGET (widget)) == GTK_TEXT_DIR_RTL)
{
flip_child (widget, &(child2_allocation));
flip_child (widget, &(child1_allocation));
flip_child (widget, &(priv->handle_pos));
}
}
else
{
gint child1_height, child2_height;
gtk_widget_get_preferred_height_for_width (priv->child1,
allocation->width,
&child1_height, NULL);
gtk_widget_get_preferred_height_for_width (priv->child2,
allocation->width,
&child2_height, NULL);
gtk_paned_calc_position (paned,
MAX (1, allocation->height - handle_size),
child1_height,
child2_height);
priv->handle_pos.x = allocation->x;
priv->handle_pos.y = allocation->y + priv->child1_size;
priv->handle_pos.width = allocation->width;
priv->handle_pos.height = handle_size;
child1_allocation.width = child2_allocation.width = allocation->width;
child1_allocation.height = MAX (1, priv->child1_size);
child1_allocation.x = child2_allocation.x = allocation->x;
child1_allocation.y = allocation->y;
child2_allocation.y = child1_allocation.y + priv->child1_size + priv->handle_pos.height;
child2_allocation.height = MAX (1, allocation->y + allocation->height - child2_allocation.y);
}
if (gtk_widget_get_mapped (widget) &&
(old_handle_pos.x != priv->handle_pos.x ||
old_handle_pos.y != priv->handle_pos.y ||
old_handle_pos.width != priv->handle_pos.width ||
old_handle_pos.height != priv->handle_pos.height))
{
GdkWindow *window;
window = gtk_widget_get_window (widget);
gdk_window_invalidate_rect (window, &old_handle_pos, FALSE);
gdk_window_invalidate_rect (window, &priv->handle_pos, FALSE);
}
if (gtk_widget_get_realized (widget))
{
if (gtk_widget_get_mapped (widget))
gdk_window_show (priv->handle);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gdk_window_move_resize (priv->handle,
priv->handle_pos.x,
priv->handle_pos.y,
handle_size,
priv->handle_pos.height);
}
else
{
gdk_window_move_resize (priv->handle,
priv->handle_pos.x,
priv->handle_pos.y,
priv->handle_pos.width,
handle_size);
}
}
/* Now allocate the childen, making sure, when resizing not to
* overlap the windows
*/
gtk_widget_get_allocation (priv->child1, &priv_child1_allocation);
if (gtk_widget_get_mapped (widget) &&
((priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
priv_child1_allocation.width < child1_allocation.width) ||
(priv->orientation == GTK_ORIENTATION_VERTICAL &&
priv_child1_allocation.height < child1_allocation.height)))
{
gtk_widget_size_allocate (priv->child2, &child2_allocation);
gtk_widget_size_allocate (priv->child1, &child1_allocation);
}
else
{
gtk_widget_size_allocate (priv->child1, &child1_allocation);
gtk_widget_size_allocate (priv->child2, &child2_allocation);
}
}
else
{
GtkAllocation child_allocation;
if (gtk_widget_get_realized (widget))
gdk_window_hide (priv->handle);
if (priv->child1)
gtk_widget_set_child_visible (priv->child1, TRUE);
if (priv->child2)
gtk_widget_set_child_visible (priv->child2, TRUE);
child_allocation.x = allocation->x;
child_allocation.y = allocation->y;
child_allocation.width = allocation->width;
child_allocation.height = allocation->height;
if (priv->child1 && gtk_widget_get_visible (priv->child1))
gtk_widget_size_allocate (priv->child1, &child_allocation);
else if (priv->child2 && gtk_widget_get_visible (priv->child2))
gtk_widget_size_allocate (priv->child2, &child_allocation);
}
}
static void
gtk_paned_realize (GtkWidget *widget)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
GdkWindow *window;
GdkWindowAttr attributes;
gint attributes_mask;
gtk_widget_set_realized (widget, TRUE);
window = gtk_widget_get_parent_window (widget);
gtk_widget_set_window (widget, window);
g_object_ref (window);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.wclass = GDK_INPUT_ONLY;
attributes.x = priv->handle_pos.x;
attributes.y = priv->handle_pos.y;
attributes.width = priv->handle_pos.width;
attributes.height = priv->handle_pos.height;
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK |
GDK_POINTER_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y;
if (gtk_widget_is_sensitive (widget))
{
attributes.cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
priv->cursor_type);
attributes_mask |= GDK_WA_CURSOR;
}
priv->handle = gdk_window_new (window,
&attributes, attributes_mask);
gdk_window_set_user_data (priv->handle, paned);
if (attributes_mask & GDK_WA_CURSOR)
g_object_unref (attributes.cursor);
}
static void
gtk_paned_unrealize (GtkWidget *widget)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
if (priv->handle)
{
gdk_window_set_user_data (priv->handle, NULL);
gdk_window_destroy (priv->handle);
priv->handle = NULL;
}
gtk_paned_set_last_child1_focus (paned, NULL);
gtk_paned_set_last_child2_focus (paned, NULL);
gtk_paned_set_saved_focus (paned, NULL);
gtk_paned_set_first_paned (paned, NULL);
GTK_WIDGET_CLASS (gtk_paned_parent_class)->unrealize (widget);
}
static void
gtk_paned_map (GtkWidget *widget)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
priv->child2 && gtk_widget_get_visible (priv->child2))
gdk_window_show (priv->handle);
GTK_WIDGET_CLASS (gtk_paned_parent_class)->map (widget);
}
static void
gtk_paned_unmap (GtkWidget *widget)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
gdk_window_hide (priv->handle);
GTK_WIDGET_CLASS (gtk_paned_parent_class)->unmap (widget);
}
static gboolean
gtk_paned_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
if (priv->child1 && gtk_widget_get_visible (priv->child1) &&
priv->child2 && gtk_widget_get_visible (priv->child2))
{
GtkStyleContext *context;
GtkStateFlags state;
GtkAllocation allocation;
gtk_widget_get_allocation (widget, &allocation);
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
if (gtk_widget_is_focus (widget))
state |= GTK_STATE_FLAG_SELECTED;
if (priv->handle_prelit)
state |= GTK_STATE_FLAG_PRELIGHT;
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_PANE_SEPARATOR);
gtk_render_handle (context, cr,
priv->handle_pos.x - allocation.x,
priv->handle_pos.y - allocation.y,
priv->handle_pos.width,
priv->handle_pos.height);
gtk_style_context_restore (context);
}
/* Chain up to draw children */
GTK_WIDGET_CLASS (gtk_paned_parent_class)->draw (widget, cr);
return FALSE;
}
static gboolean
is_rtl (GtkPaned *paned)
{
GtkPanedPrivate *priv = paned->priv;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL &&
gtk_widget_get_direction (GTK_WIDGET (paned)) == GTK_TEXT_DIR_RTL)
{
return TRUE;
}
return FALSE;
}
static void
update_drag (GtkPaned *paned)
{
GtkPanedPrivate *priv = paned->priv;
GtkAllocation allocation;
GtkWidget *widget = GTK_WIDGET (paned);
gint pos;
gint handle_size;
gint size;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_get_pointer (widget, &pos, NULL);
else
gtk_widget_get_pointer (widget, NULL, &pos);
pos -= priv->drag_pos;
if (is_rtl (paned))
{
gtk_widget_style_get (widget,
"handle-size", &handle_size,
NULL);
gtk_widget_get_allocation (widget, &allocation);
size = allocation.width - pos - handle_size;
}
else
{
size = pos;
}
size = CLAMP (size, priv->min_position, priv->max_position);
if (size != priv->child1_size)
gtk_paned_set_position (paned, size);
}
static gboolean
gtk_paned_enter (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
if (priv->in_drag)
update_drag (paned);
else
{
priv->handle_prelit = TRUE;
gtk_widget_queue_draw_area (widget,
priv->handle_pos.x,
priv->handle_pos.y,
priv->handle_pos.width,
priv->handle_pos.height);
}
return TRUE;
}
static gboolean
gtk_paned_leave (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
if (priv->in_drag)
update_drag (paned);
else
{
priv->handle_prelit = FALSE;
gtk_widget_queue_draw_area (widget,
priv->handle_pos.x,
priv->handle_pos.y,
priv->handle_pos.width,
priv->handle_pos.height);
}
return TRUE;
}
static gboolean
gtk_paned_focus (GtkWidget *widget,
GtkDirectionType direction)
{
gboolean retval;
/* This is a hack, but how can this be done without
* excessive cut-and-paste from gtkcontainer.c?
*/
gtk_widget_set_can_focus (widget, FALSE);
retval = GTK_WIDGET_CLASS (gtk_paned_parent_class)->focus (widget, direction);
gtk_widget_set_can_focus (widget, TRUE);
return retval;
}
static gboolean
gtk_paned_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
if (!priv->in_drag &&
(event->window == priv->handle) && (event->button == 1))
{
/* We need a server grab here, not gtk_grab_add(), since
* we don't want to pass events on to the widget's children */
if (gdk_device_grab (event->device,
priv->handle,
GDK_OWNERSHIP_WINDOW, FALSE,
GDK_POINTER_MOTION_HINT_MASK
| GDK_BUTTON1_MOTION_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_ENTER_NOTIFY_MASK
| GDK_LEAVE_NOTIFY_MASK,
NULL, event->time) != GDK_GRAB_SUCCESS)
return FALSE;
priv->in_drag = TRUE;
priv->grab_time = event->time;
priv->grab_device = event->device;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
priv->drag_pos = event->x;
else
priv->drag_pos = event->y;
return TRUE;
}
return FALSE;
}
static gboolean
gtk_paned_grab_broken (GtkWidget *widget,
GdkEventGrabBroken *event)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
priv->in_drag = FALSE;
priv->drag_pos = -1;
priv->position_set = TRUE;
return TRUE;
}
static void
stop_drag (GtkPaned *paned)
{
GtkPanedPrivate *priv = paned->priv;
priv->in_drag = FALSE;
priv->drag_pos = -1;
priv->position_set = TRUE;
gdk_device_ungrab (priv->grab_device,
priv->grab_time);
priv->grab_device = NULL;
}
static void
gtk_paned_grab_notify (GtkWidget *widget,
gboolean was_grabbed)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
GdkDevice *grab_device;
grab_device = priv->grab_device;
if (priv->in_drag && grab_device &&
gtk_widget_device_is_shadowed (widget, grab_device))
stop_drag (paned);
}
static void
gtk_paned_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
GdkCursor *cursor;
if (gtk_widget_get_realized (widget))
{
if (gtk_widget_is_sensitive (widget))
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
priv->cursor_type);
else
cursor = NULL;
gdk_window_set_cursor (priv->handle, cursor);
if (cursor)
g_object_unref (cursor);
}
}
static gboolean
gtk_paned_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
if (priv->in_drag && (event->button == 1))
{
stop_drag (paned);
return TRUE;
}
return FALSE;
}
static gboolean
gtk_paned_motion (GtkWidget *widget,
GdkEventMotion *event)
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
if (priv->in_drag)
{
update_drag (paned);
return TRUE;
}
return FALSE;
}
/**
* gtk_paned_new:
* @orientation: the paned's orientation.
*
* Creates a new #GtkPaned widget.
*
* Return value: a new #GtkPaned.
*
* Since: 3.0
**/
GtkWidget *
gtk_paned_new (GtkOrientation orientation)
{
return g_object_new (GTK_TYPE_PANED,
"orientation", orientation,
NULL);
}
/**
* gtk_paned_add1:
* @paned: a paned widget
* @child: the child to add
*
* Adds a child to the top or left pane with default parameters. This is
* equivalent to
* <literal>gtk_paned_pack1 (paned, child, FALSE, TRUE)</literal>.
*/
void
gtk_paned_add1 (GtkPaned *paned,
GtkWidget *widget)
{
gtk_paned_pack1 (paned, widget, FALSE, TRUE);
}
/**
* gtk_paned_add2:
* @paned: a paned widget
* @child: the child to add
*
* Adds a child to the bottom or right pane with default parameters. This
* is equivalent to
* <literal>gtk_paned_pack2 (paned, child, TRUE, TRUE)</literal>.
*/
void
gtk_paned_add2 (GtkPaned *paned,
GtkWidget *widget)
{
gtk_paned_pack2 (paned, widget, TRUE, TRUE);
}
/**
* gtk_paned_pack1:
* @paned: a paned widget
* @child: the child to add
* @resize: should this child expand when the paned widget is resized.
* @shrink: can this child be made smaller than its requisition.
*
* Adds a child to the top or left pane.
*/
void
gtk_paned_pack1 (GtkPaned *paned,
GtkWidget *child,
gboolean resize,
gboolean shrink)
{
GtkPanedPrivate *priv;
g_return_if_fail (GTK_IS_PANED (paned));
g_return_if_fail (GTK_IS_WIDGET (child));
priv = paned->priv;
if (!priv->child1)
{
priv->child1 = child;
priv->child1_resize = resize;
priv->child1_shrink = shrink;
gtk_widget_set_parent (child, GTK_WIDGET (paned));
}
}
/**
* gtk_paned_pack2:
* @paned: a paned widget
* @child: the child to add
* @resize: should this child expand when the paned widget is resized.
* @shrink: can this child be made smaller than its requisition.
*
* Adds a child to the bottom or right pane.
*/
void
gtk_paned_pack2 (GtkPaned *paned,
GtkWidget *child,
gboolean resize,
gboolean shrink)
{
GtkPanedPrivate *priv;
g_return_if_fail (GTK_IS_PANED (paned));
g_return_if_fail (GTK_IS_WIDGET (child));
priv = paned->priv;
if (!priv->child2)
{
priv->child2 = child;
priv->child2_resize = resize;
priv->child2_shrink = shrink;
gtk_widget_set_parent (child, GTK_WIDGET (paned));
}
}
static void
gtk_paned_add (GtkContainer *container,
GtkWidget *widget)
{
GtkPanedPrivate *priv;
GtkPaned *paned;
g_return_if_fail (GTK_IS_PANED (container));
paned = GTK_PANED (container);
priv = paned->priv;
if (!priv->child1)
gtk_paned_add1 (paned, widget);
else if (!priv->child2)
gtk_paned_add2 (paned, widget);
else
g_warning ("GtkPaned cannot have more than 2 children\n");
}
static void
gtk_paned_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkPaned *paned = GTK_PANED (container);
GtkPanedPrivate *priv = paned->priv;
gboolean was_visible;
was_visible = gtk_widget_get_visible (widget);
if (priv->child1 == widget)
{
gtk_widget_unparent (widget);
priv->child1 = NULL;
if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
}
else if (priv->child2 == widget)
{
gtk_widget_unparent (widget);
priv->child2 = NULL;
if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
}
}
static void
gtk_paned_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkPanedPrivate *priv;
GtkPaned *paned;
g_return_if_fail (callback != NULL);
paned = GTK_PANED (container);
priv = paned->priv;
if (priv->child1)
(*callback) (priv->child1, callback_data);
if (priv->child2)
(*callback) (priv->child2, callback_data);
}
/**
* gtk_paned_get_position:
* @paned: a #GtkPaned widget
*
* Obtains the position of the divider between the two panes.
*
* Return value: position of the divider
**/
gint
gtk_paned_get_position (GtkPaned *paned)
{
g_return_val_if_fail (GTK_IS_PANED (paned), 0);
return paned->priv->child1_size;
}
/**
* gtk_paned_set_position:
* @paned: a #GtkPaned widget
* @position: pixel position of divider, a negative value means that the position
* is unset.
*
* Sets the position of the divider between the two panes.
**/
void
gtk_paned_set_position (GtkPaned *paned,
gint position)
{
GtkPanedPrivate *priv;
GObject *object;
g_return_if_fail (GTK_IS_PANED (paned));
priv = paned->priv;
if (priv->child1_size == position)
return;
object = G_OBJECT (paned);
if (position >= 0)
{
/* We don't clamp here - the assumption is that
* if the total allocation changes at the same time
* as the position, the position set is with reference
* to the new total size. If only the position changes,
* then clamping will occur in gtk_paned_calc_position()
*/
priv->child1_size = position;
priv->position_set = TRUE;
}
else
{
priv->position_set = FALSE;
}
g_object_freeze_notify (object);
g_object_notify (object, "position");
g_object_notify (object, "position-set");
g_object_thaw_notify (object);
gtk_widget_queue_resize_no_redraw (GTK_WIDGET (paned));
#ifdef G_OS_WIN32
/* Hacky work-around for bug #144269 */
if (priv->child2 != NULL)
{
gtk_widget_queue_draw (priv->child2);
}
#endif
}
/**
* gtk_paned_get_child1:
* @paned: a #GtkPaned widget
*
* Obtains the first child of the paned widget.
*
* Return value: (transfer none): first child, or %NULL if it is not set.
*
* Since: 2.4
**/
GtkWidget *
gtk_paned_get_child1 (GtkPaned *paned)
{
g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
return paned->priv->child1;
}
/**
* gtk_paned_get_child2:
* @paned: a #GtkPaned widget
*
* Obtains the second child of the paned widget.
*
* Return value: (transfer none): second child, or %NULL if it is not set.
*
* Since: 2.4
**/
GtkWidget *
gtk_paned_get_child2 (GtkPaned *paned)
{
g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
return paned->priv->child2;
}
static void
gtk_paned_calc_position (GtkPaned *paned,
gint allocation,
gint child1_req,
gint child2_req)
{
GtkPanedPrivate *priv = paned->priv;
gint old_position;
gint old_min_position;
gint old_max_position;
old_position = priv->child1_size;
old_min_position = priv->min_position;
old_max_position = priv->max_position;
priv->min_position = priv->child1_shrink ? 0 : child1_req;
priv->max_position = allocation;
if (!priv->child2_shrink)
priv->max_position = MAX (1, priv->max_position - child2_req);
priv->max_position = MAX (priv->min_position, priv->max_position);
if (!priv->position_set)
{
if (priv->child1_resize && !priv->child2_resize)
priv->child1_size = MAX (0, allocation - child2_req);
else if (!priv->child1_resize && priv->child2_resize)
priv->child1_size = child1_req;
else if (child1_req + child2_req != 0)
priv->child1_size = allocation * ((gdouble)child1_req / (child1_req + child2_req)) + 0.5;
else
priv->child1_size = allocation * 0.5 + 0.5;
}
else
{
/* If the position was set before the initial allocation.
* (priv->last_allocation <= 0) just clamp it and leave it.
*/
if (priv->last_allocation > 0)
{
if (priv->child1_resize && !priv->child2_resize)
priv->child1_size += allocation - priv->last_allocation;
else if (!(!priv->child1_resize && priv->child2_resize))
priv->child1_size = allocation * ((gdouble) priv->child1_size / (priv->last_allocation)) + 0.5;
}
}
priv->child1_size = CLAMP (priv->child1_size,
priv->min_position,
priv->max_position);
if (priv->child1)
gtk_widget_set_child_visible (priv->child1, priv->child1_size != 0);
if (priv->child2)
gtk_widget_set_child_visible (priv->child2, priv->child1_size != allocation);
g_object_freeze_notify (G_OBJECT (paned));
if (priv->child1_size != old_position)
g_object_notify (G_OBJECT (paned), "position");
if (priv->min_position != old_min_position)
g_object_notify (G_OBJECT (paned), "min-position");
if (priv->max_position != old_max_position)
g_object_notify (G_OBJECT (paned), "max-position");
g_object_thaw_notify (G_OBJECT (paned));
priv->last_allocation = allocation;
}
static void
gtk_paned_set_saved_focus (GtkPaned *paned, GtkWidget *widget)
{
GtkPanedPrivate *priv = paned->priv;
if (priv->saved_focus)
g_object_remove_weak_pointer (G_OBJECT (priv->saved_focus),
(gpointer *)&(priv->saved_focus));
priv->saved_focus = widget;
if (priv->saved_focus)
g_object_add_weak_pointer (G_OBJECT (priv->saved_focus),
(gpointer *)&(priv->saved_focus));
}
static void
gtk_paned_set_first_paned (GtkPaned *paned, GtkPaned *first_paned)
{
GtkPanedPrivate *priv = paned->priv;
if (priv->first_paned)
g_object_remove_weak_pointer (G_OBJECT (priv->first_paned),
(gpointer *)&(priv->first_paned));
priv->first_paned = first_paned;
if (priv->first_paned)
g_object_add_weak_pointer (G_OBJECT (priv->first_paned),
(gpointer *)&(priv->first_paned));
}
static void
gtk_paned_set_last_child1_focus (GtkPaned *paned, GtkWidget *widget)
{
GtkPanedPrivate *priv = paned->priv;
if (priv->last_child1_focus)
g_object_remove_weak_pointer (G_OBJECT (priv->last_child1_focus),
(gpointer *)&(priv->last_child1_focus));
priv->last_child1_focus = widget;
if (priv->last_child1_focus)
g_object_add_weak_pointer (G_OBJECT (priv->last_child1_focus),
(gpointer *)&(priv->last_child1_focus));
}
static void
gtk_paned_set_last_child2_focus (GtkPaned *paned, GtkWidget *widget)
{
GtkPanedPrivate *priv = paned->priv;
if (priv->last_child2_focus)
g_object_remove_weak_pointer (G_OBJECT (priv->last_child2_focus),
(gpointer *)&(priv->last_child2_focus));
priv->last_child2_focus = widget;
if (priv->last_child2_focus)
g_object_add_weak_pointer (G_OBJECT (priv->last_child2_focus),
(gpointer *)&(priv->last_child2_focus));
}
static GtkWidget *
paned_get_focus_widget (GtkPaned *paned)
{
GtkWidget *toplevel;
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
if (gtk_widget_is_toplevel (toplevel))
return gtk_window_get_focus (GTK_WINDOW (toplevel));
return NULL;
}
static void
gtk_paned_set_focus_child (GtkContainer *container,
GtkWidget *focus_child)
{
GtkPaned *paned;
GtkPanedPrivate *priv;
GtkWidget *container_focus_child;
g_return_if_fail (GTK_IS_PANED (container));
paned = GTK_PANED (container);
priv = paned->priv;
if (focus_child == NULL)
{
GtkWidget *last_focus;
GtkWidget *w;
last_focus = paned_get_focus_widget (paned);
if (last_focus)
{
/* If there is one or more paned widgets between us and the
* focus widget, we want the topmost of those as last_focus
*/
for (w = last_focus; w != GTK_WIDGET (paned); w = gtk_widget_get_parent (w))
if (GTK_IS_PANED (w))
last_focus = w;
container_focus_child = gtk_container_get_focus_child (container);
if (container_focus_child == priv->child1)
gtk_paned_set_last_child1_focus (paned, last_focus);
else if (container_focus_child == priv->child2)
gtk_paned_set_last_child2_focus (paned, last_focus);
}
}
if (GTK_CONTAINER_CLASS (gtk_paned_parent_class)->set_focus_child)
GTK_CONTAINER_CLASS (gtk_paned_parent_class)->set_focus_child (container, focus_child);
}
static void
gtk_paned_get_cycle_chain (GtkPaned *paned,
GtkDirectionType direction,
GList **widgets)
{
GtkPanedPrivate *priv = paned->priv;
GtkContainer *container = GTK_CONTAINER (paned);
GtkWidget *ancestor = NULL;
GtkWidget *focus_child;
GtkWidget *parent;
GtkWidget *widget = GTK_WIDGET (paned);
GList *temp_list = NULL;
GList *list;
if (priv->in_recursion)
return;
g_assert (widgets != NULL);
if (priv->last_child1_focus &&
!gtk_widget_is_ancestor (priv->last_child1_focus, widget))
{
gtk_paned_set_last_child1_focus (paned, NULL);
}
if (priv->last_child2_focus &&
!gtk_widget_is_ancestor (priv->last_child2_focus, widget))
{
gtk_paned_set_last_child2_focus (paned, NULL);
}
parent = gtk_widget_get_parent (widget);
if (parent)
ancestor = gtk_widget_get_ancestor (parent, GTK_TYPE_PANED);
/* The idea here is that temp_list is a list of widgets we want to cycle
* to. The list is prioritized so that the first element is our first
* choice, the next our second, and so on.
*
* We can't just use g_list_reverse(), because we want to try
* priv->last_child?_focus before priv->child?, both when we
* are going forward and backward.
*/
focus_child = gtk_container_get_focus_child (container);
if (direction == GTK_DIR_TAB_FORWARD)
{
if (focus_child == priv->child1)
{
temp_list = g_list_append (temp_list, priv->last_child2_focus);
temp_list = g_list_append (temp_list, priv->child2);
temp_list = g_list_append (temp_list, ancestor);
}
else if (focus_child == priv->child2)
{
temp_list = g_list_append (temp_list, ancestor);
temp_list = g_list_append (temp_list, priv->last_child1_focus);
temp_list = g_list_append (temp_list, priv->child1);
}
else
{
temp_list = g_list_append (temp_list, priv->last_child1_focus);
temp_list = g_list_append (temp_list, priv->child1);
temp_list = g_list_append (temp_list, priv->last_child2_focus);
temp_list = g_list_append (temp_list, priv->child2);
temp_list = g_list_append (temp_list, ancestor);
}
}
else
{
if (focus_child == priv->child1)
{
temp_list = g_list_append (temp_list, ancestor);
temp_list = g_list_append (temp_list, priv->last_child2_focus);
temp_list = g_list_append (temp_list, priv->child2);
}
else if (focus_child == priv->child2)
{
temp_list = g_list_append (temp_list, priv->last_child1_focus);
temp_list = g_list_append (temp_list, priv->child1);
temp_list = g_list_append (temp_list, ancestor);
}
else
{
temp_list = g_list_append (temp_list, priv->last_child2_focus);
temp_list = g_list_append (temp_list, priv->child2);
temp_list = g_list_append (temp_list, priv->last_child1_focus);
temp_list = g_list_append (temp_list, priv->child1);
temp_list = g_list_append (temp_list, ancestor);
}
}
/* Walk the list and expand all the paned widgets. */
for (list = temp_list; list != NULL; list = list->next)
{
GtkWidget *widget = list->data;
if (widget)
{
if (GTK_IS_PANED (widget))
{
priv->in_recursion = TRUE;
gtk_paned_get_cycle_chain (GTK_PANED (widget), direction, widgets);
priv->in_recursion = FALSE;
}
else
{
*widgets = g_list_append (*widgets, widget);
}
}
}
g_list_free (temp_list);
}
static gboolean
gtk_paned_cycle_child_focus (GtkPaned *paned,
gboolean reversed)
{
GList *cycle_chain = NULL;
GList *list;
GtkDirectionType direction = reversed? GTK_DIR_TAB_BACKWARD : GTK_DIR_TAB_FORWARD;
/* ignore f6 if the handle is focused */
if (gtk_widget_is_focus (GTK_WIDGET (paned)))
return TRUE;
/* we can't just let the event propagate up the hierarchy,
* because the paned will want to cycle focus _unless_ an
* ancestor paned handles the event
*/
gtk_paned_get_cycle_chain (paned, direction, &cycle_chain);
for (list = cycle_chain; list != NULL; list = list->next)
if (gtk_widget_child_focus (GTK_WIDGET (list->data), direction))
break;
g_list_free (cycle_chain);
return TRUE;
}
static void
get_child_panes (GtkWidget *widget,
GList **panes)
{
if (!widget || !gtk_widget_get_realized (widget))
return;
if (GTK_IS_PANED (widget))
{
GtkPaned *paned = GTK_PANED (widget);
GtkPanedPrivate *priv = paned->priv;
get_child_panes (priv->child1, panes);
*panes = g_list_prepend (*panes, widget);
get_child_panes (priv->child2, panes);
}
else if (GTK_IS_CONTAINER (widget))
{
gtk_container_forall (GTK_CONTAINER (widget),
(GtkCallback)get_child_panes, panes);
}
}
static GList *
get_all_panes (GtkPaned *paned)
{
GtkPaned *topmost = NULL;
GList *result = NULL;
GtkWidget *w;
for (w = GTK_WIDGET (paned); w != NULL; w = gtk_widget_get_parent (w))
{
if (GTK_IS_PANED (w))
topmost = GTK_PANED (w);
}
g_assert (topmost);
get_child_panes (GTK_WIDGET (topmost), &result);
return g_list_reverse (result);
}
static void
gtk_paned_find_neighbours (GtkPaned *paned,
GtkPaned **next,
GtkPaned **prev)
{
GList *all_panes;
GList *this_link;
all_panes = get_all_panes (paned);
g_assert (all_panes);
this_link = g_list_find (all_panes, paned);
g_assert (this_link);
if (this_link->next)
*next = this_link->next->data;
else
*next = all_panes->data;
if (this_link->prev)
*prev = this_link->prev->data;
else
*prev = g_list_last (all_panes)->data;
g_list_free (all_panes);
}
static gboolean
gtk_paned_move_handle (GtkPaned *paned,
GtkScrollType scroll)
{
GtkPanedPrivate *priv = paned->priv;
if (gtk_widget_is_focus (GTK_WIDGET (paned)))
{
gint old_position;
gint new_position;
gint increment;
enum {
SINGLE_STEP_SIZE = 1,
PAGE_STEP_SIZE = 75
};
new_position = old_position = gtk_paned_get_position (paned);
increment = 0;
switch (scroll)
{
case GTK_SCROLL_STEP_LEFT:
case GTK_SCROLL_STEP_UP:
case GTK_SCROLL_STEP_BACKWARD:
increment = - SINGLE_STEP_SIZE;
break;
case GTK_SCROLL_STEP_RIGHT:
case GTK_SCROLL_STEP_DOWN:
case GTK_SCROLL_STEP_FORWARD:
increment = SINGLE_STEP_SIZE;
break;
case GTK_SCROLL_PAGE_LEFT:
case GTK_SCROLL_PAGE_UP:
case GTK_SCROLL_PAGE_BACKWARD:
increment = - PAGE_STEP_SIZE;
break;
case GTK_SCROLL_PAGE_RIGHT:
case GTK_SCROLL_PAGE_DOWN:
case GTK_SCROLL_PAGE_FORWARD:
increment = PAGE_STEP_SIZE;
break;
case GTK_SCROLL_START:
new_position = priv->min_position;
break;
case GTK_SCROLL_END:
new_position = priv->max_position;
break;
default:
break;
}
if (increment)
{
if (is_rtl (paned))
increment = -increment;
new_position = old_position + increment;
}
new_position = CLAMP (new_position, priv->min_position, priv->max_position);
if (old_position != new_position)
gtk_paned_set_position (paned, new_position);
return TRUE;
}
return FALSE;
}
static void
gtk_paned_restore_focus (GtkPaned *paned)
{
GtkPanedPrivate *priv = paned->priv;
if (gtk_widget_is_focus (GTK_WIDGET (paned)))
{
if (priv->saved_focus &&
gtk_widget_get_sensitive (priv->saved_focus))
{
gtk_widget_grab_focus (priv->saved_focus);
}
else
{
/* the saved focus is somehow not available for focusing,
* try
* 1) tabbing into the paned widget
* if that didn't work,
* 2) unset focus for the window if there is one
*/
if (!gtk_widget_child_focus (GTK_WIDGET (paned), GTK_DIR_TAB_FORWARD))
{
GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
if (GTK_IS_WINDOW (toplevel))
gtk_window_set_focus (GTK_WINDOW (toplevel), NULL);
}
}
gtk_paned_set_saved_focus (paned, NULL);
gtk_paned_set_first_paned (paned, NULL);
}
}
static gboolean
gtk_paned_accept_position (GtkPaned *paned)
{
GtkPanedPrivate *priv = paned->priv;
if (gtk_widget_is_focus (GTK_WIDGET (paned)))
{
priv->original_position = -1;
gtk_paned_restore_focus (paned);
return TRUE;
}
return FALSE;
}
static gboolean
gtk_paned_cancel_position (GtkPaned *paned)
{
GtkPanedPrivate *priv = paned->priv;
if (gtk_widget_is_focus (GTK_WIDGET (paned)))
{
if (priv->original_position != -1)
{
gtk_paned_set_position (paned, priv->original_position);
priv->original_position = -1;
}
gtk_paned_restore_focus (paned);
return TRUE;
}
return FALSE;
}
static gboolean
gtk_paned_cycle_handle_focus (GtkPaned *paned,
gboolean reversed)
{
GtkPanedPrivate *priv = paned->priv;
GtkPaned *next, *prev;
if (gtk_widget_is_focus (GTK_WIDGET (paned)))
{
GtkPaned *focus = NULL;
if (!priv->first_paned)
{
/* The first_pane has disappeared. As an ad-hoc solution,
* we make the currently focused paned the first_paned. To the
* user this will seem like the paned cycling has been reset.
*/
gtk_paned_set_first_paned (paned, paned);
}
gtk_paned_find_neighbours (paned, &next, &prev);
if (reversed && prev &&
prev != paned && paned != priv->first_paned)
{
focus = prev;
}
else if (!reversed && next &&
next != paned && next != priv->first_paned)
{
focus = next;
}
else
{
gtk_paned_accept_position (paned);
return TRUE;
}
g_assert (focus);
gtk_paned_set_saved_focus (focus, priv->saved_focus);
gtk_paned_set_first_paned (focus, priv->first_paned);
gtk_paned_set_saved_focus (paned, NULL);
gtk_paned_set_first_paned (paned, NULL);
gtk_widget_grab_focus (GTK_WIDGET (focus));
if (!gtk_widget_is_focus (GTK_WIDGET (paned)))
{
priv->original_position = -1;
focus->priv->original_position = gtk_paned_get_position (focus);
}
}
else
{
GtkContainer *container = GTK_CONTAINER (paned);
GtkPaned *focus;
GtkPaned *first;
GtkPaned *prev, *next;
GtkWidget *toplevel;
GtkWidget *focus_child;
gtk_paned_find_neighbours (paned, &next, &prev);
focus_child = gtk_container_get_focus_child (container);
if (focus_child == priv->child1)
{
if (reversed)
{
focus = prev;
first = paned;
}
else
{
focus = paned;
first = paned;
}
}
else if (focus_child == priv->child2)
{
if (reversed)
{
focus = paned;
first = next;
}
else
{
focus = next;
first = next;
}
}
else
{
/* Focus is not inside this paned, and we don't have focus.
* Presumably this happened because the application wants us
* to start keyboard navigating.
*/
focus = paned;
if (reversed)
first = paned;
else
first = next;
}
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (paned));
if (GTK_IS_WINDOW (toplevel))
gtk_paned_set_saved_focus (focus, gtk_window_get_focus (GTK_WINDOW (toplevel)));
gtk_paned_set_first_paned (focus, first);
focus->priv->original_position = gtk_paned_get_position (focus);
gtk_widget_grab_focus (GTK_WIDGET (focus));
}
return TRUE;
}
static gboolean
gtk_paned_toggle_handle_focus (GtkPaned *paned)
{
/* This function/signal has the wrong name. It is called when you
* press Tab or Shift-Tab and what we do is act as if
* the user pressed Return and then Tab or Shift-Tab
*/
if (gtk_widget_is_focus (GTK_WIDGET (paned)))
gtk_paned_accept_position (paned);
return FALSE;
}
/**
* gtk_paned_get_handle_window:
* @paned: a #GtkPaned
*
* Returns the #GdkWindow of the handle. This function is
* useful when handling button or motion events because it
* enables the callback to distinguish between the window
* of the paned, a child and the handle.
*
* Return value: (transfer none): the paned's handle window.
*
* Since: 2.20
**/
GdkWindow *
gtk_paned_get_handle_window (GtkPaned *paned)
{
g_return_val_if_fail (GTK_IS_PANED (paned), NULL);
return paned->priv->handle;
}
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