1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
32 static void gtk_bin_add (GtkContainer *container,
34 static void gtk_bin_remove (GtkContainer *container,
36 static void gtk_bin_forall (GtkContainer *container,
37 gboolean include_internals,
39 gpointer callback_data);
40 static GType gtk_bin_child_type (GtkContainer *container);
43 G_DEFINE_ABSTRACT_TYPE (GtkBin, gtk_bin, GTK_TYPE_CONTAINER)
46 gtk_bin_class_init (GtkBinClass *class)
48 GtkContainerClass *container_class;
50 container_class = (GtkContainerClass*) class;
52 container_class->add = gtk_bin_add;
53 container_class->remove = gtk_bin_remove;
54 container_class->forall = gtk_bin_forall;
55 container_class->child_type = gtk_bin_child_type;
59 gtk_bin_init (GtkBin *bin)
61 GTK_WIDGET_SET_FLAGS (bin, GTK_NO_WINDOW);
68 gtk_bin_child_type (GtkContainer *container)
70 if (!GTK_BIN (container)->child)
71 return GTK_TYPE_WIDGET;
77 gtk_bin_add (GtkContainer *container,
80 GtkBin *bin = GTK_BIN (container);
82 g_return_if_fail (GTK_IS_WIDGET (child));
84 if (bin->child != NULL)
86 g_warning ("Attempting to add a widget with type %s to a %s, "
87 "but as a GtkBin subclass a %s can only contain one widget at a time; "
88 "it already contains a widget of type %s",
89 g_type_name (G_OBJECT_TYPE (child)),
90 g_type_name (G_OBJECT_TYPE (bin)),
91 g_type_name (G_OBJECT_TYPE (bin)),
92 g_type_name (G_OBJECT_TYPE (bin->child)));
96 gtk_widget_set_parent (child, GTK_WIDGET (bin));
101 gtk_bin_remove (GtkContainer *container,
104 GtkBin *bin = GTK_BIN (container);
105 gboolean widget_was_visible;
107 g_return_if_fail (GTK_IS_WIDGET (child));
108 g_return_if_fail (bin->child == child);
110 widget_was_visible = GTK_WIDGET_VISIBLE (child);
112 gtk_widget_unparent (child);
115 /* queue resize regardless of GTK_WIDGET_VISIBLE (container),
116 * since that's what is needed by toplevels, which derive from GtkBin.
118 if (widget_was_visible)
119 gtk_widget_queue_resize (GTK_WIDGET (container));
123 gtk_bin_forall (GtkContainer *container,
124 gboolean include_internals,
125 GtkCallback callback,
126 gpointer callback_data)
128 GtkBin *bin = GTK_BIN (container);
130 g_return_if_fail (callback != NULL);
133 (* callback) (bin->child, callback_data);
140 * Gets the child of the #GtkBin, or %NULL if the bin contains
141 * no child widget. The returned widget does not have a reference
142 * added, so you do not need to unref it.
144 * Return value: pointer to child of the #GtkBin
147 gtk_bin_get_child (GtkBin *bin)
149 g_return_val_if_fail (GTK_IS_BIN (bin), NULL);
154 #define __GTK_BIN_C__
155 #include "gtkaliasdef.c"