Pileus Git - ~andy/gtk/blob - gtk/gtkbox.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   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.
   8  *
   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.
  13  *
  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.
  18  */
  19
  20 /*
  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/.
  25  */
  26
  27 #include "gtkbox.h"
  28 #include "gtkintl.h"
  29
  30 enum {
  31   PROP_0,
  32   PROP_SPACING,
  33   PROP_HOMOGENEOUS
  34 };
  35
  36 enum {
  37   CHILD_PROP_0,
  38   CHILD_PROP_EXPAND,
  39   CHILD_PROP_FILL,
  40   CHILD_PROP_PADDING,
  41   CHILD_PROP_PACK_TYPE,
  42   CHILD_PROP_POSITION
  43 };
  44
  45 static void gtk_box_class_init (GtkBoxClass    *klass);
  46 static void gtk_box_init       (GtkBox         *box);
  47 static void gtk_box_set_property (GObject         *object,
  48                                   guint            prop_id,
  49                                   const GValue    *value,
  50                                   GParamSpec      *pspec);
  51 static void gtk_box_get_property (GObject         *object,
  52                                   guint            prop_id,
  53                                   GValue          *value,
  54                                   GParamSpec      *pspec);
  55 static void gtk_box_map        (GtkWidget      *widget);
  56 static void gtk_box_unmap      (GtkWidget      *widget);
  57 static void gtk_box_add        (GtkContainer   *container,
  58                                 GtkWidget      *widget);
  59 static void gtk_box_remove     (GtkContainer   *container,
  60                                 GtkWidget      *widget);
  61 static void gtk_box_forall     (GtkContainer   *container,
  62                                 gboolean        include_internals,
  63                                 GtkCallback     callback,
  64                                 gpointer        callback_data);
  65 static void gtk_box_set_child_property (GtkContainer    *container,
  66                                         GtkWidget       *child,
  67                                         guint            property_id,
  68                                         const GValue    *value,
  69                                         GParamSpec      *pspec);
  70 static void gtk_box_get_child_property (GtkContainer    *container,
  71                                         GtkWidget       *child,
  72                                         guint            property_id,
  73                                         GValue          *value,
  74                                         GParamSpec      *pspec);
  75 static GtkType gtk_box_child_type (GtkContainer   *container);
  76
  77
  78 static GtkContainerClass *parent_class = NULL;
  79
  80
  81 GtkType
  82 gtk_box_get_type (void)
  83 {
  84   static GtkType box_type = 0;
  85
  86   if (!box_type)
  87     {
  88       static const GtkTypeInfo box_info =
  89       {
  90         "GtkBox",
  91         sizeof (GtkBox),
  92         sizeof (GtkBoxClass),
  93         (GtkClassInitFunc) gtk_box_class_init,
  94         (GtkObjectInitFunc) gtk_box_init,
  95         /* reserved_1 */ NULL,
  96         /* reserved_2 */ NULL,
  97         (GtkClassInitFunc) NULL,
  98       };
  99
 100       box_type = gtk_type_unique (GTK_TYPE_CONTAINER, &box_info);
 101     }
 102
 103   return box_type;
 104 }
 105
 106 static void
 107 gtk_box_class_init (GtkBoxClass *class)
 108 {
 109   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 110   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 111   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
 112
 113   parent_class = g_type_class_peek_parent (class);
 114
 115   gobject_class->set_property = gtk_box_set_property;
 116   gobject_class->get_property = gtk_box_get_property;
 117
 118   widget_class->map = gtk_box_map;
 119   widget_class->unmap = gtk_box_unmap;
 120
 121   container_class->add = gtk_box_add;
 122   container_class->remove = gtk_box_remove;
 123   container_class->forall = gtk_box_forall;
 124   container_class->child_type = gtk_box_child_type;
 125   container_class->set_child_property = gtk_box_set_child_property;
 126   container_class->get_child_property = gtk_box_get_child_property;
 127
 128   g_object_class_install_property (gobject_class,
 129                                    PROP_SPACING,
 130                                    g_param_spec_int ("spacing",
 131                                                      _("Spacing"),
 132                                                      _("The amount of space between children."),
 133                                                      0,
 134                                                      G_MAXINT,
 135                                                      0,
 136                                                      G_PARAM_READABLE | G_PARAM_WRITABLE));
 137
 138   g_object_class_install_property (gobject_class,
 139                                    PROP_HOMOGENEOUS,
 140                                    g_param_spec_boolean ("homogeneous",
 141                                                          _("Homogeneous"),
 142                                                          _("Whether the children should all be the same size."),
 143                                                          FALSE,
 144                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 145
 146   gtk_container_class_install_child_property (container_class,
 147                                               CHILD_PROP_EXPAND,
 148                                               g_param_spec_boolean ("expand", NULL, NULL,
 149                                                                     TRUE,
 150                                                                     G_PARAM_READWRITE));
 151   gtk_container_class_install_child_property (container_class,
 152                                               CHILD_PROP_FILL,
 153                                               g_param_spec_boolean ("fill", NULL, NULL,
 154                                                                     TRUE,
 155                                                                     G_PARAM_READWRITE));
 156   gtk_container_class_install_child_property (container_class,
 157                                               CHILD_PROP_PADDING,
 158                                               g_param_spec_uint ("padding", NULL, NULL,
 159                                                                  0, G_MAXINT, 0,
 160                                                                  G_PARAM_READWRITE));
 161   gtk_container_class_install_child_property (container_class,
 162                                               CHILD_PROP_PACK_TYPE,
 163                                               g_param_spec_enum ("pack_type", NULL, NULL,
 164                                                                  GTK_TYPE_PACK_TYPE, GTK_PACK_START,
 165                                                                  G_PARAM_READWRITE));
 166   gtk_container_class_install_child_property (container_class,
 167                                               CHILD_PROP_POSITION,
 168                                               g_param_spec_int ("position", NULL, NULL,
 169                                                                 -1, G_MAXINT, 0,
 170                                                                 G_PARAM_READWRITE));
 171 }
 172
 173 static void
 174 gtk_box_init (GtkBox *box)
 175 {
 176   GTK_WIDGET_SET_FLAGS (box, GTK_NO_WINDOW);
 177
 178   box->children = NULL;
 179   box->spacing = 0;
 180   box->homogeneous = FALSE;
 181 }
 182
 183 static void
 184 gtk_box_set_property (GObject         *object,
 185                       guint            prop_id,
 186                       const GValue    *value,
 187                       GParamSpec      *pspec)
 188 {
 189   GtkBox *box;
 190
 191   box = GTK_BOX (object);
 192
 193   switch (prop_id)
 194     {
 195     case PROP_SPACING:
 196       gtk_box_set_spacing (box, g_value_get_int (value));
 197       break;
 198     case PROP_HOMOGENEOUS:
 199       gtk_box_set_homogeneous (box, g_value_get_boolean (value));
 200       break;
 201     default:
 202       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 203       break;
 204     }
 205 }
 206
 207 static void gtk_box_get_property (GObject         *object,
 208                                   guint            prop_id,
 209                                   GValue          *value,
 210                                   GParamSpec      *pspec)
 211 {
 212   GtkBox *box;
 213
 214   box = GTK_BOX (object);
 215
 216   switch (prop_id)
 217     {
 218     case PROP_SPACING:
 219       g_value_set_int (value, box->spacing);
 220       break;
 221     case PROP_HOMOGENEOUS:
 222       g_value_set_boolean (value, box->homogeneous);
 223       break;
 224     default:
 225       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 226       break;
 227     }
 228 }
 229
 230 static GtkType
 231 gtk_box_child_type      (GtkContainer   *container)
 232 {
 233   return GTK_TYPE_WIDGET;
 234 }
 235
 236 static void
 237 gtk_box_set_child_property (GtkContainer    *container,
 238                             GtkWidget       *child,
 239                             guint            property_id,
 240                             const GValue    *value,
 241                             GParamSpec      *pspec)
 242 {
 243   gboolean expand = 0;
 244   gboolean fill = 0;
 245   guint padding = 0;
 246   GtkPackType pack_type = 0;
 247
 248   if (property_id != CHILD_PROP_POSITION)
 249     gtk_box_query_child_packing (GTK_BOX (container),
 250                                  child,
 251                                  &expand,
 252                                  &fill,
 253                                  &padding,
 254                                  &pack_type);
 255   switch (property_id)
 256     {
 257     case CHILD_PROP_EXPAND:
 258       gtk_box_set_child_packing (GTK_BOX (container),
 259                                  child,
 260                                  g_value_get_boolean (value),
 261                                  fill,
 262                                  padding,
 263                                  pack_type);
 264       break;
 265     case CHILD_PROP_FILL:
 266       gtk_box_set_child_packing (GTK_BOX (container),
 267                                  child,
 268                                  expand,
 269                                  g_value_get_boolean (value),
 270                                  padding,
 271                                  pack_type);
 272       break;
 273     case CHILD_PROP_PADDING:
 274       gtk_box_set_child_packing (GTK_BOX (container),
 275                                  child,
 276                                  expand,
 277                                  fill,
 278                                  g_value_get_uint (value),
 279                                  pack_type);
 280       break;
 281     case CHILD_PROP_PACK_TYPE:
 282       gtk_box_set_child_packing (GTK_BOX (container),
 283                                  child,
 284                                  expand,
 285                                  fill,
 286                                  padding,
 287                                  g_value_get_enum (value));
 288       break;
 289     case CHILD_PROP_POSITION:
 290       gtk_box_reorder_child (GTK_BOX (container),
 291                              child,
 292                              g_value_get_int (value));
 293       break;
 294     default:
 295       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 296       break;
 297     }
 298 }
 299
 300 static void
 301 gtk_box_get_child_property (GtkContainer *container,
 302                             GtkWidget    *child,
 303                             guint         property_id,
 304                             GValue       *value,
 305                             GParamSpec   *pspec)
 306 {
 307   gboolean expand = 0;
 308   gboolean fill = 0;
 309   guint padding = 0;
 310   GtkPackType pack_type = 0;
 311   GList *list;
 312
 313   if (property_id != CHILD_PROP_POSITION)
 314     gtk_box_query_child_packing (GTK_BOX (container),
 315                                  child,
 316                                  &expand,
 317                                  &fill,
 318                                  &padding,
 319                                  &pack_type);
 320   switch (property_id)
 321     {
 322       guint i;
 323     case CHILD_PROP_EXPAND:
 324       g_value_set_boolean (value, expand);
 325       break;
 326     case CHILD_PROP_FILL:
 327       g_value_set_boolean (value, fill);
 328       break;
 329     case CHILD_PROP_PADDING:
 330       g_value_set_uint (value, padding);
 331       break;
 332     case CHILD_PROP_PACK_TYPE:
 333       g_value_set_enum (value, pack_type);
 334       break;
 335     case CHILD_PROP_POSITION:
 336       i = 0;
 337       for (list = GTK_BOX (container)->children; list; list = list->next)
 338         {
 339           GtkBoxChild *child_entry;
 340
 341           child_entry = list->data;
 342           if (child_entry->widget == child)
 343             break;
 344           i++;
 345         }
 346       g_value_set_int (value, list ? i : -1);
 347       break;
 348     default:
 349       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 350       break;
 351     }
 352 }
 353
 354 void
 355 gtk_box_pack_start (GtkBox    *box,
 356                     GtkWidget *child,
 357                     gboolean   expand,
 358                     gboolean   fill,
 359                     guint      padding)
 360 {
 361   GtkBoxChild *child_info;
 362
 363   g_return_if_fail (box != NULL);
 364   g_return_if_fail (GTK_IS_BOX (box));
 365   g_return_if_fail (child != NULL);
 366   g_return_if_fail (child->parent == NULL);
 367
 368   child_info = g_new (GtkBoxChild, 1);
 369   child_info->widget = child;
 370   child_info->padding = padding;
 371   child_info->expand = expand ? TRUE : FALSE;
 372   child_info->fill = fill ? TRUE : FALSE;
 373   child_info->pack = GTK_PACK_START;
 374
 375   box->children = g_list_append (box->children, child_info);
 376
 377   gtk_widget_freeze_child_notify (child);
 378
 379   gtk_widget_set_parent (child, GTK_WIDGET (box));
 380
 381   if (GTK_WIDGET_REALIZED (box))
 382     gtk_widget_realize (child);
 383
 384   if (GTK_WIDGET_VISIBLE (box) && GTK_WIDGET_VISIBLE (child))
 385     {
 386       if (GTK_WIDGET_MAPPED (box))
 387         gtk_widget_map (child);
 388
 389       gtk_widget_queue_resize (child);
 390     }
 391   gtk_widget_child_notify (child, "expand");
 392   gtk_widget_child_notify (child, "fill");
 393   gtk_widget_child_notify (child, "padding");
 394   gtk_widget_child_notify (child, "pack_type");
 395   gtk_widget_child_notify (child, "position");
 396   gtk_widget_thaw_child_notify (child);
 397 }
 398
 399 void
 400 gtk_box_pack_end (GtkBox    *box,
 401                   GtkWidget *child,
 402                   gboolean   expand,
 403                   gboolean   fill,
 404                   guint      padding)
 405 {
 406   GtkBoxChild *child_info;
 407
 408   g_return_if_fail (box != NULL);
 409   g_return_if_fail (GTK_IS_BOX (box));
 410   g_return_if_fail (child != NULL);
 411   g_return_if_fail (child->parent == NULL);
 412
 413   child_info = g_new (GtkBoxChild, 1);
 414   child_info->widget = child;
 415   child_info->padding = padding;
 416   child_info->expand = expand ? TRUE : FALSE;
 417   child_info->fill = fill ? TRUE : FALSE;
 418   child_info->pack = GTK_PACK_END;
 419
 420   box->children = g_list_append (box->children, child_info);
 421
 422   gtk_widget_freeze_child_notify (child);
 423
 424   gtk_widget_set_parent (child, GTK_WIDGET (box));
 425
 426   if (GTK_WIDGET_REALIZED (box))
 427     gtk_widget_realize (child);
 428
 429   if (GTK_WIDGET_VISIBLE (box) && GTK_WIDGET_VISIBLE (child))
 430     {
 431       if (GTK_WIDGET_MAPPED (box))
 432         gtk_widget_map (child);
 433
 434       gtk_widget_queue_resize (child);
 435     }
 436   gtk_widget_child_notify (child, "expand");
 437   gtk_widget_child_notify (child, "fill");
 438   gtk_widget_child_notify (child, "padding");
 439   gtk_widget_child_notify (child, "pack_type");
 440   gtk_widget_child_notify (child, "position");
 441   gtk_widget_thaw_child_notify (child);
 442 }
 443
 444 void
 445 gtk_box_pack_start_defaults (GtkBox    *box,
 446                              GtkWidget *child)
 447 {
 448   g_return_if_fail (box != NULL);
 449   g_return_if_fail (GTK_IS_BOX (box));
 450   g_return_if_fail (child != NULL);
 451
 452   gtk_box_pack_start (box, child, TRUE, TRUE, 0);
 453 }
 454
 455 void
 456 gtk_box_pack_end_defaults (GtkBox    *box,
 457                            GtkWidget *child)
 458 {
 459   g_return_if_fail (box != NULL);
 460   g_return_if_fail (GTK_IS_BOX (box));
 461   g_return_if_fail (child != NULL);
 462
 463   gtk_box_pack_end (box, child, TRUE, TRUE, 0);
 464 }
 465
 466 void
 467 gtk_box_set_homogeneous (GtkBox  *box,
 468                          gboolean homogeneous)
 469 {
 470   g_return_if_fail (box != NULL);
 471   g_return_if_fail (GTK_IS_BOX (box));
 472
 473   if ((homogeneous ? TRUE : FALSE) != box->homogeneous)
 474     {
 475       box->homogeneous = homogeneous ? TRUE : FALSE;
 476       g_object_notify (G_OBJECT (box), "homogeneous");
 477       gtk_widget_queue_resize (GTK_WIDGET (box));
 478     }
 479 }
 480
 481 /**
 482  * gtk_box_get_homogeneous:
 483  * @box: a #GtkBox
 484  *
 485  * Returns whether the box is homogeneous (all children are the
 486  * same size). See gtk_box_set_homogeneous ().
 487  *
 488  * Return value: %TRUE if the box is homogeneous.
 489  **/
 490 gboolean
 491 gtk_box_get_homogeneous (GtkBox *box)
 492 {
 493   g_return_val_if_fail (GTK_IS_BOX (box), FALSE);
 494
 495   return box->homogeneous;
 496 }
 497
 498 void
 499 gtk_box_set_spacing (GtkBox *box,
 500                      gint    spacing)
 501 {
 502   g_return_if_fail (box != NULL);
 503   g_return_if_fail (GTK_IS_BOX (box));
 504
 505   if (spacing != box->spacing)
 506     {
 507       box->spacing = spacing;
 508       g_object_notify (G_OBJECT (box), "spacing");
 509       gtk_widget_queue_resize (GTK_WIDGET (box));
 510     }
 511 }
 512
 513 /**
 514  * gtk_box_get_spacing:
 515  * @box: a #GtkBox
 516  *
 517  * Gets the value set by gtk_box_set_spacing().
 518  *
 519  * Return value: spacing between children
 520  **/
 521 gint
 522 gtk_box_get_spacing (GtkBox *box)
 523 {
 524   g_return_val_if_fail (GTK_IS_BOX (box), 0);
 525
 526   return box->spacing;
 527 }
 528
 529 void
 530 gtk_box_reorder_child (GtkBox    *box,
 531                        GtkWidget *child,
 532                        gint       position)
 533 {
 534   GList *list;
 535
 536   g_return_if_fail (box != NULL);
 537   g_return_if_fail (GTK_IS_BOX (box));
 538   g_return_if_fail (child != NULL);
 539
 540   list = box->children;
 541   while (list)
 542     {
 543       GtkBoxChild *child_info;
 544
 545       child_info = list->data;
 546       if (child_info->widget == child)
 547         break;
 548
 549       list = list->next;
 550     }
 551
 552   if (list && box->children->next)
 553     {
 554       GList *tmp_list;
 555
 556       if (list->next)
 557         list->next->prev = list->prev;
 558       if (list->prev)
 559         list->prev->next = list->next;
 560       else
 561         box->children = list->next;
 562
 563       tmp_list = box->children;
 564       while (position && tmp_list->next)
 565         {
 566           position--;
 567           tmp_list = tmp_list->next;
 568         }
 569
 570       if (position)
 571         {
 572           tmp_list->next = list;
 573           list->prev = tmp_list;
 574           list->next = NULL;
 575         }
 576       else
 577         {
 578           if (tmp_list->prev)
 579             tmp_list->prev->next = list;
 580           else
 581             box->children = list;
 582           list->prev = tmp_list->prev;
 583           tmp_list->prev = list;
 584           list->next = tmp_list;
 585         }
 586
 587       gtk_widget_child_notify (child, "position");
 588       if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (box))
 589         gtk_widget_queue_resize (child);
 590     }
 591 }
 592
 593 void
 594 gtk_box_query_child_packing (GtkBox             *box,
 595                              GtkWidget          *child,
 596                              gboolean           *expand,
 597                              gboolean           *fill,
 598                              guint              *padding,
 599                              GtkPackType        *pack_type)
 600 {
 601   GList *list;
 602   GtkBoxChild *child_info = NULL;
 603
 604   g_return_if_fail (box != NULL);
 605   g_return_if_fail (GTK_IS_BOX (box));
 606   g_return_if_fail (child != NULL);
 607
 608   list = box->children;
 609   while (list)
 610     {
 611       child_info = list->data;
 612       if (child_info->widget == child)
 613         break;
 614
 615       list = list->next;
 616     }
 617
 618   if (list)
 619     {
 620       if (expand)
 621         *expand = child_info->expand;
 622       if (fill)
 623         *fill = child_info->fill;
 624       if (padding)
 625         *padding = child_info->padding;
 626       if (pack_type)
 627         *pack_type = child_info->pack;
 628     }
 629 }
 630
 631 void
 632 gtk_box_set_child_packing (GtkBox               *box,
 633                            GtkWidget            *child,
 634                            gboolean              expand,
 635                            gboolean              fill,
 636                            guint                 padding,
 637                            GtkPackType           pack_type)
 638 {
 639   GList *list;
 640   GtkBoxChild *child_info = NULL;
 641
 642   g_return_if_fail (box != NULL);
 643   g_return_if_fail (GTK_IS_BOX (box));
 644   g_return_if_fail (child != NULL);
 645
 646   list = box->children;
 647   while (list)
 648     {
 649       child_info = list->data;
 650       if (child_info->widget == child)
 651         break;
 652
 653       list = list->next;
 654     }
 655
 656   gtk_widget_freeze_child_notify (child);
 657   if (list)
 658     {
 659       child_info->expand = expand != FALSE;
 660       gtk_widget_child_notify (child, "expand");
 661       child_info->fill = fill != FALSE;
 662       gtk_widget_child_notify (child, "fill");
 663       child_info->padding = padding;
 664       gtk_widget_child_notify (child, "padding");
 665       if (pack_type == GTK_PACK_END)
 666         child_info->pack = GTK_PACK_END;
 667       else
 668         child_info->pack = GTK_PACK_START;
 669       gtk_widget_child_notify (child, "pack_type");
 670
 671       if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (box))
 672         gtk_widget_queue_resize (child);
 673     }
 674   gtk_widget_thaw_child_notify (child);
 675 }
 676
 677 static void
 678 gtk_box_map (GtkWidget *widget)
 679 {
 680   GtkBox *box;
 681   GtkBoxChild *child;
 682   GList *children;
 683
 684   g_return_if_fail (widget != NULL);
 685   g_return_if_fail (GTK_IS_BOX (widget));
 686
 687   box = GTK_BOX (widget);
 688   GTK_WIDGET_SET_FLAGS (box, GTK_MAPPED);
 689
 690   children = box->children;
 691   while (children)
 692     {
 693       child = children->data;
 694       children = children->next;
 695
 696       if (GTK_WIDGET_VISIBLE (child->widget) &&
 697           !GTK_WIDGET_MAPPED (child->widget))
 698         gtk_widget_map (child->widget);
 699     }
 700 }
 701
 702 static void
 703 gtk_box_unmap (GtkWidget *widget)
 704 {
 705   GtkBox *box;
 706   GtkBoxChild *child;
 707   GList *children;
 708
 709   g_return_if_fail (widget != NULL);
 710   g_return_if_fail (GTK_IS_BOX (widget));
 711
 712   box = GTK_BOX (widget);
 713   GTK_WIDGET_UNSET_FLAGS (box, GTK_MAPPED);
 714
 715   children = box->children;
 716   while (children)
 717     {
 718       child = children->data;
 719       children = children->next;
 720
 721       if (GTK_WIDGET_VISIBLE (child->widget) &&
 722           GTK_WIDGET_MAPPED (child->widget))
 723         gtk_widget_unmap (child->widget);
 724     }
 725 }
 726
 727 static void
 728 gtk_box_add (GtkContainer *container,
 729              GtkWidget    *widget)
 730 {
 731   g_return_if_fail (container != NULL);
 732   g_return_if_fail (GTK_IS_BOX (container));
 733   g_return_if_fail (widget != NULL);
 734
 735   gtk_box_pack_start_defaults (GTK_BOX (container), widget);
 736 }
 737
 738 static void
 739 gtk_box_remove (GtkContainer *container,
 740                 GtkWidget    *widget)
 741 {
 742   GtkBox *box;
 743   GtkBoxChild *child;
 744   GList *children;
 745
 746   g_return_if_fail (container != NULL);
 747   g_return_if_fail (GTK_IS_BOX (container));
 748   g_return_if_fail (widget != NULL);
 749
 750   box = GTK_BOX (container);
 751
 752   children = box->children;
 753   while (children)
 754     {
 755       child = children->data;
 756
 757       if (child->widget == widget)
 758         {
 759           gboolean was_visible;
 760
 761           was_visible = GTK_WIDGET_VISIBLE (widget);
 762           gtk_widget_unparent (widget);
 763
 764           box->children = g_list_remove_link (box->children, children);
 765           g_list_free (children);
 766           g_free (child);
 767
 768           /* queue resize regardless of GTK_WIDGET_VISIBLE (container),
 769            * since that's what is needed by toplevels.
 770            */
 771           if (was_visible)
 772             gtk_widget_queue_resize (GTK_WIDGET (container));
 773
 774           break;
 775         }
 776
 777       children = children->next;
 778     }
 779 }
 780
 781 static void
 782 gtk_box_forall (GtkContainer *container,
 783                 gboolean      include_internals,
 784                 GtkCallback   callback,
 785                 gpointer      callback_data)
 786 {
 787   GtkBox *box;
 788   GtkBoxChild *child;
 789   GList *children;
 790
 791   g_return_if_fail (container != NULL);
 792   g_return_if_fail (GTK_IS_BOX (container));
 793   g_return_if_fail (callback != NULL);
 794
 795   box = GTK_BOX (container);
 796
 797   children = box->children;
 798   while (children)
 799     {
 800       child = children->data;
 801       children = children->next;
 802
 803       if (child->pack == GTK_PACK_START)
 804         (* callback) (child->widget, callback_data);
 805     }
 806
 807   children = g_list_last (box->children);
 808   while (children)
 809     {
 810       child = children->data;
 811       children = children->prev;
 812
 813       if (child->pack == GTK_PACK_END)
 814         (* callback) (child->widget, callback_data);
 815     }
 816 }