src/gtk1/win_gtk.c

   1 /* ///////////////////////////////////////////////////////////////////////////
   2 // Name:        win_gtk.c
   3 // Purpose:     native GTK+ widget for wxWindows
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////// */
   9
  10 #include "wx/gtk/win_gtk.h"
  11 #include "gtk/gtksignal.h"
  12 #include "gtk/gtknotebook.h"
  13
  14 #ifdef __cplusplus
  15 extern "C" {
  16 #endif /* __cplusplus */
  17
  18 static void gtk_myfixed_class_init    (GtkMyFixedClass    *klass);
  19 static void gtk_myfixed_init          (GtkMyFixed         *myfixed);
  20 static void gtk_myfixed_map           (GtkWidget        *widget);
  21 #if (GTK_MINOR_VERSION == 0)
  22 static void gtk_myfixed_unmap         (GtkWidget        *widget);
  23 #endif
  24 static void gtk_myfixed_realize       (GtkWidget        *widget);
  25 static void gtk_myfixed_size_request  (GtkWidget        *widget,
  26                                      GtkRequisition   *requisition);
  27 static void gtk_myfixed_size_allocate (GtkWidget        *widget,
  28                                      GtkAllocation    *allocation);
  29 static void gtk_myfixed_paint         (GtkWidget        *widget,
  30                                      GdkRectangle     *area);
  31 static void gtk_myfixed_draw          (GtkWidget        *widget,
  32                                      GdkRectangle     *area);
  33 static gint gtk_myfixed_expose        (GtkWidget        *widget,
  34                                      GdkEventExpose   *event);
  35 static void gtk_myfixed_add           (GtkContainer     *container,
  36                                      GtkWidget        *widget);
  37 static void gtk_myfixed_remove        (GtkContainer     *container,
  38                                      GtkWidget        *widget);
  39 static void gtk_myfixed_foreach       (GtkContainer     *container,
  40 #if (GTK_MINOR_VERSION > 0)
  41                                      gboolean         include_internals,
  42 #endif
  43                                      GtkCallback      callback,
  44                                      gpointer         callback_data);
  45 #if (GTK_MINOR_VERSION > 0)
  46 static GtkType gtk_myfixed_child_type (GtkContainer     *container);
  47 #endif
  48
  49 #if (GTK_MINOR_VERSION > 0)
  50 static void  gtk_myfixed_scroll_set_adjustments    (GtkMyFixed   *myfixed,
  51                                                GtkAdjustment *hadj,
  52                                                GtkAdjustment *vadj);
  53 #endif
  54
  55
  56
  57 static GtkContainerClass *parent_class = NULL;
  58
  59 guint
  60 gtk_myfixed_get_type ()
  61 {
  62   static guint myfixed_type = 0;
  63
  64   if (!myfixed_type)
  65     {
  66       GtkTypeInfo myfixed_info =
  67       {
  68         "GtkMyFixed",
  69         sizeof (GtkMyFixed),
  70         sizeof (GtkMyFixedClass),
  71         (GtkClassInitFunc) gtk_myfixed_class_init,
  72         (GtkObjectInitFunc) gtk_myfixed_init,
  73 #if (GTK_MINOR_VERSION > 0)
  74         /* reserved_1 */ NULL,
  75         /* reserved_2 */ NULL,
  76         (GtkClassInitFunc) NULL,
  77 #else
  78         (GtkArgSetFunc) NULL,
  79         (GtkArgGetFunc) NULL,
  80 #endif
  81       };
  82
  83       myfixed_type = gtk_type_unique (gtk_container_get_type (), &myfixed_info);
  84     }
  85
  86   return myfixed_type;
  87 }
  88
  89 static void
  90 gtk_myfixed_class_init (GtkMyFixedClass *klass)
  91 {
  92   GtkObjectClass *object_class;
  93   GtkWidgetClass *widget_class;
  94   GtkContainerClass *container_class;
  95
  96   object_class = (GtkObjectClass*) klass;
  97   widget_class = (GtkWidgetClass*) klass;
  98   container_class = (GtkContainerClass*) klass;
  99
 100 #if (GTK_MINOR_VERSION > 0)
 101   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 102 #else
 103   parent_class = gtk_type_class (gtk_container_get_type ());
 104 #endif
 105
 106   widget_class->map = gtk_myfixed_map;
 107 #if (GTK_MINOR_VERSION == 0)
 108   widget_class->unmap = gtk_myfixed_unmap;
 109 #endif
 110   widget_class->realize = gtk_myfixed_realize;
 111   widget_class->size_request = gtk_myfixed_size_request;
 112   widget_class->size_allocate = gtk_myfixed_size_allocate;
 113   widget_class->draw = gtk_myfixed_draw;
 114   widget_class->expose_event = gtk_myfixed_expose;
 115
 116   container_class->add = gtk_myfixed_add;
 117   container_class->remove = gtk_myfixed_remove;
 118 #if (GTK_MINOR_VERSION > 0)
 119   container_class->forall = gtk_myfixed_foreach;
 120 #else
 121   container_class->foreach = gtk_myfixed_foreach;
 122 #endif
 123
 124 #if (GTK_MINOR_VERSION > 0)
 125   container_class->child_type = gtk_myfixed_child_type;
 126 #endif
 127
 128 #if (GTK_MINOR_VERSION > 0)
 129   klass->set_scroll_adjustments = gtk_myfixed_scroll_set_adjustments;
 130
 131   widget_class->set_scroll_adjustments_signal =
 132     gtk_signal_new ("set_scroll_adjustments",
 133                     GTK_RUN_LAST,
 134                     object_class->type,
 135                     GTK_SIGNAL_OFFSET (GtkMyFixedClass, set_scroll_adjustments),
 136                     gtk_marshal_NONE__POINTER_POINTER,
 137                     GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
 138 #endif
 139 }
 140
 141 #if (GTK_MINOR_VERSION > 0)
 142 static GtkType
 143 gtk_myfixed_child_type (GtkContainer     *container)
 144 {
 145   return GTK_TYPE_WIDGET;
 146 }
 147 #endif
 148
 149 static void
 150 gtk_myfixed_init (GtkMyFixed *myfixed)
 151 {
 152   GTK_WIDGET_UNSET_FLAGS (myfixed, GTK_NO_WINDOW);
 153
 154 #if (GTK_MINOR_VERSION == 0)
 155   GTK_WIDGET_SET_FLAGS (myfixed, GTK_BASIC);
 156 #endif
 157
 158 #if (GTK_MINOR_VERSION > 0)
 159   myfixed->shadow_type = GTK_SHADOW_NONE;
 160 #endif
 161
 162   myfixed->children = NULL;
 163 }
 164
 165 GtkWidget*
 166 gtk_myfixed_new ()
 167 {
 168   GtkMyFixed *myfixed;
 169
 170   myfixed = gtk_type_new (gtk_myfixed_get_type ());
 171
 172   return GTK_WIDGET (myfixed);
 173 }
 174
 175 #if (GTK_MINOR_VERSION > 0)
 176 void  gtk_myfixed_scroll_set_adjustments (GtkMyFixed     *myfixed,
 177                                                GtkAdjustment *hadj,
 178                                                GtkAdjustment *vadj)
 179 {
 180    /* OK, this is embarassing, but this function has to be here */
 181 }
 182
 183 void
 184 gtk_myfixed_set_shadow_type (GtkMyFixed   *myfixed,
 185                               GtkShadowType  type)
 186 {
 187   g_return_if_fail (myfixed != NULL);
 188   g_return_if_fail (GTK_IS_MYFIXED (myfixed));
 189
 190   if ((GtkShadowType) myfixed->shadow_type != type)
 191     {
 192       myfixed->shadow_type = type;
 193
 194       if (GTK_WIDGET_VISIBLE (myfixed))
 195         {
 196           gtk_widget_size_allocate (GTK_WIDGET (myfixed), &(GTK_WIDGET (myfixed)->allocation));
 197           gtk_widget_queue_draw (GTK_WIDGET (myfixed));
 198         }
 199     }
 200 }
 201 #endif
 202
 203 void
 204 gtk_myfixed_put (GtkMyFixed   *myfixed,
 205                  GtkWidget      *widget,
 206                  gint16         x,
 207                  gint16         y,
 208                  gint16         width,
 209                  gint16         height)
 210 {
 211   GtkMyFixedChild *child_info;
 212
 213   g_return_if_fail (myfixed != NULL);
 214   g_return_if_fail (GTK_IS_MYFIXED (myfixed));
 215   g_return_if_fail (widget != NULL);
 216
 217   child_info = g_new (GtkMyFixedChild, 1);
 218   child_info->widget = widget;
 219   child_info->x = x;
 220   child_info->y = y;
 221   child_info->width = width;
 222   child_info->height = height;
 223
 224   gtk_widget_set_parent (widget, GTK_WIDGET (myfixed));
 225
 226   myfixed->children = g_list_append (myfixed->children, child_info);
 227
 228   if (GTK_WIDGET_REALIZED (myfixed) && !GTK_WIDGET_REALIZED (widget))
 229     gtk_widget_realize (widget);
 230
 231   if (GTK_WIDGET_MAPPED (myfixed) && !GTK_WIDGET_MAPPED (widget) && GTK_WIDGET_VISIBLE (widget))
 232     gtk_widget_map (widget);
 233
 234   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (myfixed))
 235     gtk_widget_queue_resize (GTK_WIDGET (myfixed));
 236 }
 237
 238 void
 239 gtk_myfixed_move (GtkMyFixed     *myfixed,
 240                   GtkWidget      *widget,
 241                   gint16         x,
 242                   gint16         y)
 243 {
 244   GtkMyFixedChild *child;
 245   GList *children;
 246
 247   g_return_if_fail (myfixed != NULL);
 248   g_return_if_fail (GTK_IS_MYFIXED (myfixed));
 249   g_return_if_fail (widget != NULL);
 250
 251   children = myfixed->children;
 252   while (children)
 253     {
 254       child = children->data;
 255       children = children->next;
 256
 257       if (child->widget == widget)
 258         {
 259            gtk_myfixed_set_size( myfixed, widget, x, y, child->width, child->height );
 260            break;
 261         }
 262     }
 263 }
 264
 265 void
 266 gtk_myfixed_resize (GtkMyFixed     *myfixed,
 267                     GtkWidget      *widget,
 268                     gint16         width,
 269                     gint16         height)
 270 {
 271   GtkMyFixedChild *child;
 272   GList *children;
 273
 274   g_return_if_fail (myfixed != NULL);
 275   g_return_if_fail (GTK_IS_MYFIXED (myfixed));
 276   g_return_if_fail (widget != NULL);
 277
 278   children = myfixed->children;
 279   while (children)
 280     {
 281       child = children->data;
 282       children = children->next;
 283
 284       if (child->widget == widget)
 285         {
 286            gtk_myfixed_set_size( myfixed, widget, child->x, child->y, width, height );
 287            break;
 288         }
 289     }
 290 }
 291
 292 void
 293 gtk_myfixed_set_size (GtkMyFixed     *myfixed,
 294                       GtkWidget      *widget,
 295                       gint16         x,
 296                       gint16         y,
 297                       gint16         width,
 298                       gint16         height)
 299 {
 300   GtkMyFixedChild *child;
 301   GList *children;
 302   GtkAllocation child_allocation;
 303
 304   g_return_if_fail (myfixed != NULL);
 305   g_return_if_fail (GTK_IS_MYFIXED (myfixed));
 306   g_return_if_fail (widget != NULL);
 307
 308   children = myfixed->children;
 309   while (children)
 310     {
 311       child = children->data;
 312       children = children->next;
 313
 314       if (child->widget == widget)
 315         {
 316           if ((child->x == x) &&
 317               (child->y == y) &&
 318               (child->width == width) &&
 319               (child->height == height)) return;
 320
 321           child->x = x;
 322           child->y = y;
 323           child->width = width;
 324           child->height = height;
 325
 326           if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (myfixed))
 327           {
 328              if ((child->width > 1) && (child->height > 1) && (GTK_WIDGET_REALIZED(widget)))
 329              {
 330                 child_allocation.x = child->x;
 331                 child_allocation.y = child->y;
 332                 child_allocation.width = child->width;
 333                 child_allocation.height = child->height;
 334                 gtk_widget_size_allocate (widget, &child_allocation);
 335              }
 336              else
 337              {
 338                 gtk_widget_queue_resize (GTK_WIDGET (myfixed));
 339              }
 340           }
 341
 342           break;
 343         }
 344     }
 345 }
 346
 347 static void
 348 gtk_myfixed_map (GtkWidget *widget)
 349 {
 350   GtkMyFixed *myfixed;
 351   GtkMyFixedChild *child;
 352   GList *children;
 353
 354   g_return_if_fail (widget != NULL);
 355   g_return_if_fail (GTK_IS_MYFIXED (widget));
 356
 357   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 358   myfixed = GTK_MYFIXED (widget);
 359
 360   gdk_window_show (widget->window);
 361
 362   children = myfixed->children;
 363   while (children)
 364     {
 365       child = children->data;
 366       children = children->next;
 367
 368       if (GTK_WIDGET_VISIBLE (child->widget) &&
 369           !GTK_WIDGET_MAPPED (child->widget))
 370         gtk_widget_map (child->widget);
 371     }
 372 }
 373
 374 #if (GTK_MINOR_VERSION == 0)
 375 static void
 376 gtk_myfixed_unmap (GtkWidget *widget)
 377 {
 378   g_return_if_fail (widget != NULL);
 379   g_return_if_fail (GTK_IS_MYFIXED (widget));
 380
 381   GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
 382 }
 383 #endif
 384
 385 static void
 386 gtk_myfixed_realize (GtkWidget *widget)
 387 {
 388   GtkMyFixed *myfixed;
 389   GdkWindowAttr attributes;
 390   gint attributes_mask;
 391
 392   g_return_if_fail (widget != NULL);
 393   g_return_if_fail (GTK_IS_MYFIXED (widget));
 394
 395   myfixed = GTK_MYFIXED (widget);
 396
 397   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 398
 399   attributes.window_type = GDK_WINDOW_CHILD;
 400
 401 #if (GTK_MINOR_VERSION > 0)
 402   attributes.x = widget->allocation.x;
 403   attributes.y = widget->allocation.y;
 404   attributes.width = widget->allocation.width;
 405   attributes.height = widget->allocation.height;
 406
 407   if (myfixed->shadow_type != GTK_SHADOW_NONE)
 408   {
 409       attributes.x += 2;
 410       attributes.y += 2;
 411       attributes.width -= 4;
 412       attributes.height -= 4;
 413   }
 414
 415   if (attributes.width < 2) attributes.width = 2;
 416   if (attributes.height < 2) attributes.height = 2;
 417 #else
 418   attributes.x = widget->allocation.x;
 419   attributes.y = widget->allocation.y;
 420   attributes.width = 32000;
 421   attributes.height = 32000;
 422 #endif
 423   attributes.wclass = GDK_INPUT_OUTPUT;
 424   attributes.visual = gtk_widget_get_visual (widget);
 425   attributes.colormap = gtk_widget_get_colormap (widget);
 426   attributes.event_mask = gtk_widget_get_events (widget);
 427   attributes.event_mask |=
 428   GDK_EXPOSURE_MASK     |
 429   GDK_POINTER_MOTION_MASK       |
 430   GDK_POINTER_MOTION_HINT_MASK  |
 431   GDK_BUTTON_MOTION_MASK        |
 432   GDK_BUTTON1_MOTION_MASK       |
 433   GDK_BUTTON2_MOTION_MASK       |
 434   GDK_BUTTON3_MOTION_MASK       |
 435   GDK_BUTTON_PRESS_MASK         |
 436   GDK_BUTTON_RELEASE_MASK       |
 437   GDK_KEY_PRESS_MASK            |
 438   GDK_KEY_RELEASE_MASK          |
 439   GDK_ENTER_NOTIFY_MASK         |
 440   GDK_LEAVE_NOTIFY_MASK         |
 441   GDK_FOCUS_CHANGE_MASK;
 442
 443   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 444
 445   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 446                                    attributes_mask);
 447   gdk_window_set_user_data (widget->window, widget);
 448
 449   widget->style = gtk_style_attach (widget->style, widget->window);
 450   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 451 }
 452
 453 static void
 454 gtk_myfixed_size_request (GtkWidget      *widget,
 455                         GtkRequisition *requisition)
 456 {
 457   GtkMyFixed *myfixed;
 458   GtkMyFixedChild *child;
 459   GList *children;
 460
 461   g_return_if_fail (widget != NULL);
 462   g_return_if_fail (GTK_IS_MYFIXED (widget));
 463   g_return_if_fail (requisition != NULL);
 464
 465   myfixed = GTK_MYFIXED (widget);
 466
 467   /* request very little, I'm not sure if requesting nothing
 468      will always have positive effects on stability... */
 469   requisition->width = 2;
 470   requisition->height = 2;
 471
 472   children = myfixed->children;
 473   while (children)
 474     {
 475       child = children->data;
 476       children = children->next;
 477
 478       if (GTK_WIDGET_VISIBLE (child->widget))
 479         {
 480           gtk_widget_size_request (child->widget, &child->widget->requisition);
 481         }
 482     }
 483 }
 484
 485 static void
 486 gtk_myfixed_size_allocate (GtkWidget     *widget,
 487                            GtkAllocation *allocation)
 488 {
 489   GtkMyFixed *myfixed;
 490   gint border;
 491   GtkMyFixedChild *child;
 492   GtkAllocation child_allocation;
 493   GList *children;
 494
 495   g_return_if_fail (widget != NULL);
 496   g_return_if_fail (GTK_IS_MYFIXED(widget));
 497   g_return_if_fail (allocation != NULL);
 498
 499   myfixed = GTK_MYFIXED (widget);
 500
 501     widget->allocation = *allocation;
 502 #if (GTK_MINOR_VERSION > 0)
 503   if (myfixed->shadow_type == GTK_SHADOW_NONE)
 504     border = 0;
 505   else
 506     border = 2;
 507 #else
 508   border = 0;
 509 #endif
 510
 511   if (GTK_WIDGET_REALIZED (widget))
 512   {
 513     gdk_window_move_resize( widget->window,
 514                             allocation->x+border, allocation->y+border,
 515 #if (GTK_MINOR_VERSION > 0)
 516                             allocation->width-border*2, allocation->height-border*2
 517 #else
 518                             32000, 32000
 519 #endif
 520                            );
 521   }
 522
 523   children = myfixed->children;
 524   while (children)
 525     {
 526       child = children->data;
 527       children = children->next;
 528
 529       /* please look at the text in wxWindow::DoSetSize() on why the
 530          test GTK_WIDGET_REALIZED() has to be here */
 531       if (GTK_WIDGET_VISIBLE (child->widget) &&
 532          !(!GTK_WIDGET_REALIZED(child->widget) &&
 533             GTK_IS_NOTEBOOK(child->widget) ))
 534         {
 535           child_allocation.x = child->x;
 536           child_allocation.y = child->y;
 537           child_allocation.width = child->width;
 538           child_allocation.height = child->height;
 539           gtk_widget_size_allocate (child->widget, &child_allocation);
 540         }
 541     }
 542 }
 543
 544 static void
 545 gtk_myfixed_paint (GtkWidget    *widget,
 546                    GdkRectangle *area)
 547 {
 548   g_return_if_fail (widget != NULL);
 549   g_return_if_fail (GTK_IS_MYFIXED (widget));
 550   g_return_if_fail (area != NULL);
 551
 552   if (GTK_WIDGET_DRAWABLE (widget))
 553       gdk_window_clear_area (widget->window,
 554                              area->x, area->y,
 555                              area->width, area->height);
 556 }
 557
 558 static void
 559 gtk_myfixed_draw (GtkWidget    *widget,
 560                   GdkRectangle *area)
 561 {
 562   GtkMyFixed *myfixed;
 563   GtkMyFixedChild *child;
 564   GdkRectangle child_area;
 565   GList *children;
 566
 567   g_return_if_fail (widget != NULL);
 568   g_return_if_fail (GTK_IS_MYFIXED (widget));
 569
 570   if (GTK_WIDGET_DRAWABLE (widget))
 571     {
 572       myfixed = GTK_MYFIXED (widget);
 573       gtk_myfixed_paint (widget, area);
 574
 575       children = myfixed->children;
 576       while (children)
 577         {
 578           child = children->data;
 579           children = children->next;
 580
 581           if (gtk_widget_intersect (child->widget, area, &child_area))
 582             gtk_widget_draw (child->widget, &child_area);
 583         }
 584     }
 585 }
 586
 587 static gint
 588 gtk_myfixed_expose (GtkWidget      *widget,
 589                     GdkEventExpose *event)
 590 {
 591   GtkMyFixed *myfixed;
 592   GtkMyFixedChild *child;
 593   GdkEventExpose child_event;
 594   GList *children;
 595
 596   g_return_val_if_fail (widget != NULL, FALSE);
 597   g_return_val_if_fail (GTK_IS_MYFIXED (widget), FALSE);
 598   g_return_val_if_fail (event != NULL, FALSE);
 599
 600   if (GTK_WIDGET_DRAWABLE (widget))
 601     {
 602       myfixed = GTK_MYFIXED (widget);
 603
 604       child_event = *event;
 605
 606       children = myfixed->children;
 607       while (children)
 608         {
 609           child = children->data;
 610           children = children->next;
 611
 612           if (GTK_WIDGET_NO_WINDOW (child->widget) &&
 613               gtk_widget_intersect (child->widget, &event->area,
 614                                     &child_event.area))
 615             gtk_widget_event (child->widget, (GdkEvent*) &child_event);
 616         }
 617     }
 618
 619   return FALSE;
 620 }
 621
 622 static void
 623 gtk_myfixed_add (GtkContainer *container,
 624                GtkWidget    *widget)
 625 {
 626   g_return_if_fail (container != NULL);
 627   g_return_if_fail (GTK_IS_MYFIXED (container));
 628   g_return_if_fail (widget != NULL);
 629
 630   gtk_myfixed_put (GTK_MYFIXED (container), widget, 0, 0, 20, 20 );
 631 }
 632
 633 static void
 634 gtk_myfixed_remove (GtkContainer *container,
 635                   GtkWidget    *widget)
 636 {
 637   GtkMyFixed *myfixed;
 638   GtkMyFixedChild *child;
 639   GList *children;
 640
 641   g_return_if_fail (container != NULL);
 642   g_return_if_fail (GTK_IS_MYFIXED (container));
 643   g_return_if_fail (widget != NULL);
 644
 645   myfixed = GTK_MYFIXED (container);
 646
 647   children = myfixed->children;
 648   while (children)
 649     {
 650       child = children->data;
 651
 652       if (child->widget == widget)
 653         {
 654           gtk_widget_unparent (widget);
 655
 656           myfixed->children = g_list_remove_link (myfixed->children, children);
 657           g_list_free (children);
 658           g_free (child);
 659
 660           if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (container))
 661             gtk_widget_queue_resize (GTK_WIDGET (container));
 662
 663           break;
 664         }
 665
 666       children = children->next;
 667     }
 668 }
 669
 670 static void
 671 gtk_myfixed_foreach (GtkContainer *container,
 672 #if (GTK_MINOR_VERSION > 0)
 673                    gboolean      include_internals,
 674 #endif
 675                    GtkCallback   callback,
 676                    gpointer      callback_data)
 677 {
 678   GtkMyFixed *myfixed;
 679   GtkMyFixedChild *child;
 680   GList *children;
 681
 682   g_return_if_fail (container != NULL);
 683   g_return_if_fail (GTK_IS_MYFIXED (container));
 684   g_return_if_fail (callback != NULL);
 685
 686   myfixed = GTK_MYFIXED (container);
 687
 688   children = myfixed->children;
 689   while (children)
 690     {
 691       child = children->data;
 692       children = children->next;
 693
 694       (* callback) (child->widget, callback_data);
 695     }
 696 }
 697
 698
 699 #ifdef __cplusplus
 700 }
 701 #endif /* __cplusplus */
 702