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/.
29 #include "gtkextendedlayout.h"
33 static void gtk_bin_add (GtkContainer *container,
35 static void gtk_bin_remove (GtkContainer *container,
37 static void gtk_bin_forall (GtkContainer *container,
38 gboolean include_internals,
40 gpointer callback_data);
41 static GType gtk_bin_child_type (GtkContainer *container);
44 static void gtk_bin_extended_layout_init (GtkExtendedLayoutIface *iface);
45 static void gtk_bin_get_width_for_height (GtkExtendedLayout *layout,
49 static void gtk_bin_get_height_for_width (GtkExtendedLayout *layout,
52 gint *natural_height);
55 static GtkExtendedLayoutIface *parent_extended_layout_iface;
57 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GtkBin, gtk_bin, GTK_TYPE_CONTAINER,
58 G_IMPLEMENT_INTERFACE (GTK_TYPE_EXTENDED_LAYOUT,
59 gtk_bin_extended_layout_init))
62 gtk_bin_class_init (GtkBinClass *class)
64 GtkContainerClass *container_class;
66 container_class = (GtkContainerClass*) class;
68 container_class->add = gtk_bin_add;
69 container_class->remove = gtk_bin_remove;
70 container_class->forall = gtk_bin_forall;
71 container_class->child_type = gtk_bin_child_type;
75 gtk_bin_init (GtkBin *bin)
77 gtk_widget_set_has_window (GTK_WIDGET (bin), FALSE);
84 gtk_bin_child_type (GtkContainer *container)
86 if (!GTK_BIN (container)->child)
87 return GTK_TYPE_WIDGET;
93 gtk_bin_add (GtkContainer *container,
96 GtkBin *bin = GTK_BIN (container);
98 if (bin->child != NULL)
100 g_warning ("Attempting to add a widget with type %s to a %s, "
101 "but as a GtkBin subclass a %s can only contain one widget at a time; "
102 "it already contains a widget of type %s",
103 g_type_name (G_OBJECT_TYPE (child)),
104 g_type_name (G_OBJECT_TYPE (bin)),
105 g_type_name (G_OBJECT_TYPE (bin)),
106 g_type_name (G_OBJECT_TYPE (bin->child)));
110 gtk_widget_set_parent (child, GTK_WIDGET (bin));
115 gtk_bin_remove (GtkContainer *container,
118 GtkBin *bin = GTK_BIN (container);
119 gboolean widget_was_visible;
121 g_return_if_fail (bin->child == child);
123 widget_was_visible = gtk_widget_get_visible (child);
125 gtk_widget_unparent (child);
128 /* queue resize regardless of gtk_widget_get_visible (container),
129 * since that's what is needed by toplevels, which derive from GtkBin.
131 if (widget_was_visible)
132 gtk_widget_queue_resize (GTK_WIDGET (container));
136 gtk_bin_forall (GtkContainer *container,
137 gboolean include_internals,
138 GtkCallback callback,
139 gpointer callback_data)
141 GtkBin *bin = GTK_BIN (container);
144 (* callback) (bin->child, callback_data);
148 /* GtkBin widgets define the padding and borders independantly so
149 * we cannot provide a generic get_desired_size() for the same reason
150 * we never implemented size_request() here.
152 * But for cases where the GtkBin class's padding is constant and
153 * does not vary based on allocation (most cases), we can at least
154 * deduce a common code path for the get_width_for_height()/get_height_for_width()
155 * cases by using the delta of the base size requsts.
158 gtk_bin_extended_layout_init (GtkExtendedLayoutIface *iface)
160 parent_extended_layout_iface = g_type_interface_peek_parent (iface);
162 iface->get_width_for_height = gtk_bin_get_width_for_height;
163 iface->get_height_for_width = gtk_bin_get_height_for_width;
167 get_child_padding_delta (GtkBin *bin,
171 gint hmin, vmin, child_hmin, child_vmin;
173 gtk_extended_layout_get_desired_width (GTK_EXTENDED_LAYOUT (bin), &hmin, NULL);
174 gtk_extended_layout_get_desired_height (GTK_EXTENDED_LAYOUT (bin), &vmin, NULL);
176 gtk_extended_layout_get_desired_width (GTK_EXTENDED_LAYOUT (bin->child), &child_hmin, NULL);
177 gtk_extended_layout_get_desired_height (GTK_EXTENDED_LAYOUT (bin->child), &child_vmin, NULL);
179 *delta_h = hmin - child_hmin;
180 *delta_v = vmin - child_vmin;
184 gtk_bin_get_width_for_height (GtkExtendedLayout *layout,
189 GtkBin *bin = GTK_BIN (layout);
190 gint hdelta, vdelta, child_min, child_nat;
194 get_child_padding_delta (bin, &hdelta, &vdelta);
196 gtk_extended_layout_get_width_for_height (GTK_EXTENDED_LAYOUT (bin->child),
198 &child_min, &child_nat);
201 *minimum_width = child_min + hdelta;
204 *natural_width = child_nat + hdelta;
207 GTK_EXTENDED_LAYOUT_GET_IFACE (layout)->get_desired_width (layout, minimum_width, natural_width);
208 /* parent_extended_layout_iface->get_height_for_width (layout, height, minimum_width, natural_width); */
212 gtk_bin_get_height_for_width (GtkExtendedLayout *layout,
214 gint *minimum_height,
215 gint *natural_height)
217 GtkBin *bin = GTK_BIN (layout);
218 gint hdelta, vdelta, child_min, child_nat;
222 get_child_padding_delta (bin, &hdelta, &vdelta);
224 gtk_extended_layout_get_height_for_width (GTK_EXTENDED_LAYOUT (bin->child),
226 &child_min, &child_nat);
229 *minimum_height = child_min + vdelta;
232 *natural_height = child_nat + vdelta;
235 GTK_EXTENDED_LAYOUT_GET_IFACE (layout)->get_desired_height (layout, minimum_height, natural_height);
236 /* parent_extended_layout_iface->get_height_for_width (layout, width, minimum_height, natural_height); */
244 * Gets the child of the #GtkBin, or %NULL if the bin contains
245 * no child widget. The returned widget does not have a reference
246 * added, so you do not need to unref it.
248 * Return value: (transfer none): pointer to child of the #GtkBin
251 gtk_bin_get_child (GtkBin *bin)
253 g_return_val_if_fail (GTK_IS_BIN (bin), NULL);
258 #define __GTK_BIN_C__
259 #include "gtkaliasdef.c"