Pileus Git - ~andy/gtk/blob - gtk/gtkframe.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 <config.h>
  28 #include <string.h>
  29 #include "gtkalias.h"
  30 #include "gtkframe.h"
  31 #include "gtklabel.h"
  32 #include "gtkintl.h"
  33
  34 #define LABEL_PAD 1
  35 #define LABEL_SIDE_PAD 2
  36
  37 enum {
  38   PROP_0,
  39   PROP_LABEL,
  40   PROP_LABEL_XALIGN,
  41   PROP_LABEL_YALIGN,
  42   PROP_SHADOW,
  43   PROP_SHADOW_TYPE,
  44   PROP_LABEL_WIDGET
  45 };
  46
  47
  48 static void gtk_frame_class_init    (GtkFrameClass  *klass);
  49 static void gtk_frame_init          (GtkFrame       *frame);
  50 static void gtk_frame_set_property (GObject      *object,
  51                                     guint         param_id,
  52                                     const GValue *value,
  53                                     GParamSpec   *pspec);
  54 static void gtk_frame_get_property (GObject     *object,
  55                                     guint        param_id,
  56                                     GValue      *value,
  57                                     GParamSpec  *pspec);
  58 static void gtk_frame_paint         (GtkWidget      *widget,
  59                                      GdkRectangle   *area);
  60 static gint gtk_frame_expose        (GtkWidget      *widget,
  61                                      GdkEventExpose *event);
  62 static void gtk_frame_size_request  (GtkWidget      *widget,
  63                                      GtkRequisition *requisition);
  64 static void gtk_frame_size_allocate (GtkWidget      *widget,
  65                                      GtkAllocation  *allocation);
  66 static void gtk_frame_remove        (GtkContainer   *container,
  67                                      GtkWidget      *child);
  68 static void gtk_frame_forall        (GtkContainer   *container,
  69                                      gboolean        include_internals,
  70                                      GtkCallback     callback,
  71                                      gpointer        callback_data);
  72
  73 static void gtk_frame_compute_child_allocation      (GtkFrame      *frame,
  74                                                      GtkAllocation *child_allocation);
  75 static void gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
  76                                                      GtkAllocation *child_allocation);
  77
  78 static GtkBinClass *parent_class = NULL;
  79
  80
  81 GType
  82 gtk_frame_get_type (void)
  83 {
  84   static GType frame_type = 0;
  85
  86   if (!frame_type)
  87     {
  88       static const GTypeInfo frame_info =
  89       {
  90         sizeof (GtkFrameClass),
  91         NULL,           /* base_init */
  92         NULL,           /* base_finalize */
  93         (GClassInitFunc) gtk_frame_class_init,
  94         NULL,           /* class_finalize */
  95         NULL,           /* class_data */
  96         sizeof (GtkFrame),
  97         0,              /* n_preallocs */
  98         (GInstanceInitFunc) gtk_frame_init,
  99       };
 100
 101       frame_type = g_type_register_static (GTK_TYPE_BIN, "GtkFrame",
 102                                            &frame_info, 0);
 103     }
 104
 105   return frame_type;
 106 }
 107
 108 static void
 109 gtk_frame_class_init (GtkFrameClass *class)
 110 {
 111   GObjectClass *gobject_class;
 112   GtkWidgetClass *widget_class;
 113   GtkContainerClass *container_class;
 114
 115   gobject_class = (GObjectClass*) class;
 116   widget_class = GTK_WIDGET_CLASS (class);
 117   container_class = GTK_CONTAINER_CLASS (class);
 118
 119   parent_class = g_type_class_peek_parent (class);
 120
 121   gobject_class->set_property = gtk_frame_set_property;
 122   gobject_class->get_property = gtk_frame_get_property;
 123
 124   g_object_class_install_property (gobject_class,
 125                                    PROP_LABEL,
 126                                    g_param_spec_string ("label",
 127                                                         P_("Label"),
 128                                                         P_("Text of the frame's label"),
 129                                                         NULL,
 130                                                         G_PARAM_READABLE |
 131                                                         G_PARAM_WRITABLE));
 132   g_object_class_install_property (gobject_class,
 133                                    PROP_LABEL_XALIGN,
 134                                    g_param_spec_float ("label_xalign",
 135                                                        P_("Label xalign"),
 136                                                        P_("The horizontal alignment of the label"),
 137                                                        0.0,
 138                                                        1.0,
 139                                                        0.5,
 140                                                        G_PARAM_READABLE |
 141                                                        G_PARAM_WRITABLE));
 142   g_object_class_install_property (gobject_class,
 143                                    PROP_LABEL_YALIGN,
 144                                    g_param_spec_float ("label_yalign",
 145                                                        P_("Label yalign"),
 146                                                        P_("The vertical alignment of the label"),
 147                                                        0.0,
 148                                                        1.0,
 149                                                        0.5,
 150                                                        G_PARAM_READABLE |
 151                                                        G_PARAM_WRITABLE));
 152   g_object_class_install_property (gobject_class,
 153                                    PROP_SHADOW,
 154                                    g_param_spec_enum ("shadow", NULL,
 155                                                       P_("Deprecated property, use shadow_type instead"),
 156                                                       GTK_TYPE_SHADOW_TYPE,
 157                                                       GTK_SHADOW_ETCHED_IN,
 158                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 159   g_object_class_install_property (gobject_class,
 160                                    PROP_SHADOW_TYPE,
 161                                    g_param_spec_enum ("shadow_type",
 162                                                       P_("Frame shadow"),
 163                                                       P_("Appearance of the frame border"),
 164                                                       GTK_TYPE_SHADOW_TYPE,
 165                                                       GTK_SHADOW_ETCHED_IN,
 166                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 167
 168   g_object_class_install_property (gobject_class,
 169                                    PROP_LABEL_WIDGET,
 170                                    g_param_spec_object ("label_widget",
 171                                                         P_("Label widget"),
 172                                                         P_("A widget to display in place of the usual frame label"),
 173                                                         GTK_TYPE_WIDGET,
 174                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 175
 176   widget_class->expose_event = gtk_frame_expose;
 177   widget_class->size_request = gtk_frame_size_request;
 178   widget_class->size_allocate = gtk_frame_size_allocate;
 179
 180   container_class->remove = gtk_frame_remove;
 181   container_class->forall = gtk_frame_forall;
 182
 183   class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
 184 }
 185
 186 static void
 187 gtk_frame_init (GtkFrame *frame)
 188 {
 189   frame->label_widget = NULL;
 190   frame->shadow_type = GTK_SHADOW_ETCHED_IN;
 191   frame->label_xalign = 0.0;
 192   frame->label_yalign = 0.5;
 193 }
 194
 195 static void
 196 gtk_frame_set_property (GObject         *object,
 197                         guint            prop_id,
 198                         const GValue    *value,
 199                         GParamSpec      *pspec)
 200 {
 201   GtkFrame *frame;
 202
 203   frame = GTK_FRAME (object);
 204
 205   switch (prop_id)
 206     {
 207     case PROP_LABEL:
 208       gtk_frame_set_label (frame, g_value_get_string (value));
 209       break;
 210     case PROP_LABEL_XALIGN:
 211       gtk_frame_set_label_align (frame, g_value_get_float (value),
 212                                  frame->label_yalign);
 213       break;
 214     case PROP_LABEL_YALIGN:
 215       gtk_frame_set_label_align (frame, frame->label_xalign,
 216                                  g_value_get_float (value));
 217       break;
 218     case PROP_SHADOW:
 219     case PROP_SHADOW_TYPE:
 220       gtk_frame_set_shadow_type (frame, g_value_get_enum (value));
 221       break;
 222     case PROP_LABEL_WIDGET:
 223       gtk_frame_set_label_widget (frame, g_value_get_object (value));
 224       break;
 225     default:
 226       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 227       break;
 228     }
 229 }
 230
 231 static void
 232 gtk_frame_get_property (GObject         *object,
 233                         guint            prop_id,
 234                         GValue          *value,
 235                         GParamSpec      *pspec)
 236 {
 237   GtkFrame *frame;
 238
 239   frame = GTK_FRAME (object);
 240
 241   switch (prop_id)
 242     {
 243     case PROP_LABEL:
 244       g_value_set_string (value, gtk_frame_get_label (frame));
 245       break;
 246     case PROP_LABEL_XALIGN:
 247       g_value_set_float (value, frame->label_xalign);
 248       break;
 249     case PROP_LABEL_YALIGN:
 250       g_value_set_float (value, frame->label_yalign);
 251       break;
 252     case PROP_SHADOW:
 253     case PROP_SHADOW_TYPE:
 254       g_value_set_enum (value, frame->shadow_type);
 255       break;
 256     case PROP_LABEL_WIDGET:
 257       g_value_set_object (value,
 258                           frame->label_widget ?
 259                           G_OBJECT (frame->label_widget) : NULL);
 260       break;
 261     default:
 262       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 263       break;
 264     }
 265 }
 266
 267 /**
 268  * gtk_frame_new:
 269  * @label: the text to use as the label of the frame
 270  *
 271  * Creates a new #GtkFrame, with optional label @label.
 272  * If @label is %NULL, the label is omitted.
 273  *
 274  * Return value: a new #GtkFrame widget
 275  **/
 276 GtkWidget*
 277 gtk_frame_new (const gchar *label)
 278 {
 279   return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
 280 }
 281
 282 static void
 283 gtk_frame_remove (GtkContainer *container,
 284                   GtkWidget    *child)
 285 {
 286   GtkFrame *frame = GTK_FRAME (container);
 287
 288   if (frame->label_widget == child)
 289     gtk_frame_set_label_widget (frame, NULL);
 290   else
 291     GTK_CONTAINER_CLASS (parent_class)->remove (container, child);
 292 }
 293
 294 static void
 295 gtk_frame_forall (GtkContainer *container,
 296                   gboolean      include_internals,
 297                   GtkCallback   callback,
 298                   gpointer      callback_data)
 299 {
 300   GtkBin *bin = GTK_BIN (container);
 301   GtkFrame *frame = GTK_FRAME (container);
 302
 303   if (bin->child)
 304     (* callback) (bin->child, callback_data);
 305
 306   if (frame->label_widget)
 307     (* callback) (frame->label_widget, callback_data);
 308 }
 309
 310 /**
 311  * gtk_frame_set_label:
 312  * @frame: a #GtkFrame
 313  * @label: the text to use as the label of the frame
 314  *
 315  * Sets the text of the label. If @label is %NULL,
 316  * the current label is removed.
 317  **/
 318 void
 319 gtk_frame_set_label (GtkFrame *frame,
 320                      const gchar *label)
 321 {
 322   g_return_if_fail (GTK_IS_FRAME (frame));
 323
 324   if (!label)
 325     {
 326       gtk_frame_set_label_widget (frame, NULL);
 327     }
 328   else
 329     {
 330       GtkWidget *child = gtk_label_new (label);
 331       gtk_widget_show (child);
 332
 333       gtk_frame_set_label_widget (frame, child);
 334     }
 335 }
 336
 337 /**
 338  * gtk_frame_get_label:
 339  * @frame: a #GtkFrame
 340  *
 341  * If the frame's label widget is a #GtkLabel, returns the
 342  * text in the label widget. (The frame will have a #GtkLabel
 343  * for the label widget if a non-%NULL argument was passed
 344  * to gtk_frame_new().)
 345  *
 346  * Return value: the text in the label, or %NULL if there
 347  *               was no label widget or the lable widget was not
 348  *               a #GtkLabel. This string is owned by GTK+ and
 349  *               must not be modified or freed.
 350  **/
 351 G_CONST_RETURN gchar *
 352 gtk_frame_get_label (GtkFrame *frame)
 353 {
 354   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 355
 356   if (frame->label_widget && GTK_IS_LABEL (frame->label_widget))
 357     return gtk_label_get_text (GTK_LABEL (frame->label_widget));
 358   else
 359     return NULL;
 360 }
 361
 362 /**
 363  * gtk_frame_set_label_widget:
 364  * @frame: a #GtkFrame
 365  * @label_widget: the new label widget
 366  *
 367  * Sets the label widget for the frame. This is the widget that
 368  * will appear embedded in the top edge of the frame as a
 369  * title.
 370  **/
 371 void
 372 gtk_frame_set_label_widget (GtkFrame  *frame,
 373                             GtkWidget *label_widget)
 374 {
 375   gboolean need_resize = FALSE;
 376
 377   g_return_if_fail (GTK_IS_FRAME (frame));
 378   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
 379   g_return_if_fail (label_widget == NULL || label_widget->parent == NULL);
 380
 381   if (frame->label_widget == label_widget)
 382     return;
 383
 384   if (frame->label_widget)
 385     {
 386       need_resize = GTK_WIDGET_VISIBLE (frame->label_widget);
 387       gtk_widget_unparent (frame->label_widget);
 388     }
 389
 390   frame->label_widget = label_widget;
 391
 392   if (label_widget)
 393     {
 394       frame->label_widget = label_widget;
 395       gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
 396       need_resize |= GTK_WIDGET_VISIBLE (label_widget);
 397     }
 398
 399   if (GTK_WIDGET_VISIBLE (frame) && need_resize)
 400     gtk_widget_queue_resize (GTK_WIDGET (frame));
 401
 402   g_object_freeze_notify (G_OBJECT (frame));
 403   g_object_notify (G_OBJECT (frame), "label_widget");
 404   g_object_notify (G_OBJECT (frame), "label");
 405   g_object_thaw_notify (G_OBJECT (frame));
 406 }
 407
 408 /**
 409  * gtk_frame_get_label_widget:
 410  * @frame: a #GtkFrame
 411  *
 412  * Retrieves the label widget for the frame. See
 413  * gtk_frame_set_label_widget().
 414  *
 415  * Return value: the label widget, or %NULL if there is none.
 416  **/
 417 GtkWidget *
 418 gtk_frame_get_label_widget (GtkFrame *frame)
 419 {
 420   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 421
 422   return frame->label_widget;
 423 }
 424
 425 /**
 426  * gtk_frame_set_label_align:
 427  * @frame: a #GtkFrame
 428  * @xalign: The position of the label along the top edge
 429  *   of the widget. A value of 0.0 represents left alignment;
 430  *   1.0 represents right alignment.
 431  * @yalign: The y alignment of the label. A value of 0.0 aligns under
 432  *   the frame; 1.0 aligns above the frame.
 433  *
 434  * Sets the alignment of the frame widget's label. The
 435  * default values for a newly created frame are 0.0 and 0.5.
 436  **/
 437 void
 438 gtk_frame_set_label_align (GtkFrame *frame,
 439                            gfloat    xalign,
 440                            gfloat    yalign)
 441 {
 442   g_return_if_fail (GTK_IS_FRAME (frame));
 443
 444   xalign = CLAMP (xalign, 0.0, 1.0);
 445   yalign = CLAMP (yalign, 0.0, 1.0);
 446
 447   g_object_freeze_notify (G_OBJECT (frame));
 448   if (xalign != frame->label_xalign)
 449     {
 450       frame->label_xalign = xalign;
 451       g_object_notify (G_OBJECT (frame), "label_xalign");
 452     }
 453
 454   if (yalign != frame->label_yalign)
 455     {
 456       frame->label_yalign = yalign;
 457       g_object_notify (G_OBJECT (frame), "label_yalign");
 458     }
 459
 460   g_object_thaw_notify (G_OBJECT (frame));
 461   gtk_widget_queue_resize (GTK_WIDGET (frame));
 462 }
 463
 464 /**
 465  * gtk_frame_get_label_align:
 466  * @frame: a #GtkFrame
 467  * @xalign: location to store X alignment of frame's label, or %NULL
 468  * @yalign: location to store X alignment of frame's label, or %NULL
 469  *
 470  * Retrieves the X and Y alignment of the frame's label. See
 471  * gtk_frame_set_label_align().
 472  **/
 473 void
 474 gtk_frame_get_label_align (GtkFrame *frame,
 475                            gfloat   *xalign,
 476                            gfloat   *yalign)
 477 {
 478   g_return_if_fail (GTK_IS_FRAME (frame));
 479
 480   if (xalign)
 481     *xalign = frame->label_xalign;
 482   if (yalign)
 483     *yalign = frame->label_yalign;
 484 }
 485
 486 /**
 487  * gtk_frame_set_shadow_type:
 488  * @frame: a #GtkFrame
 489  * @type: the new #GtkShadowType
 490  *
 491  * Sets the shadow type for @frame.
 492  **/
 493 void
 494 gtk_frame_set_shadow_type (GtkFrame      *frame,
 495                            GtkShadowType  type)
 496 {
 497   g_return_if_fail (GTK_IS_FRAME (frame));
 498
 499   if ((GtkShadowType) frame->shadow_type != type)
 500     {
 501       frame->shadow_type = type;
 502       g_object_notify (G_OBJECT (frame), "shadow_type");
 503
 504       if (GTK_WIDGET_DRAWABLE (frame))
 505         {
 506           gtk_widget_queue_draw (GTK_WIDGET (frame));
 507         }
 508
 509       gtk_widget_queue_resize (GTK_WIDGET (frame));
 510     }
 511 }
 512
 513 /**
 514  * gtk_frame_get_shadow_type:
 515  * @frame: a #GtkFrame
 516  *
 517  * Retrieves the shadow type of the frame. See
 518  * gtk_frame_set_shadow_type().
 519  *
 520  * Return value: the current shadow type of the frame.
 521  **/
 522 GtkShadowType
 523 gtk_frame_get_shadow_type (GtkFrame *frame)
 524 {
 525   g_return_val_if_fail (GTK_IS_FRAME (frame), GTK_SHADOW_ETCHED_IN);
 526
 527   return frame->shadow_type;
 528 }
 529
 530 static void
 531 gtk_frame_paint (GtkWidget    *widget,
 532                  GdkRectangle *area)
 533 {
 534   GtkFrame *frame;
 535   gint x, y, width, height;
 536
 537   if (GTK_WIDGET_DRAWABLE (widget))
 538     {
 539       frame = GTK_FRAME (widget);
 540
 541       x = frame->child_allocation.x - widget->style->xthickness;
 542       y = frame->child_allocation.y - widget->style->ythickness;
 543       width = frame->child_allocation.width + 2 * widget->style->xthickness;
 544       height =  frame->child_allocation.height + 2 * widget->style->ythickness;
 545
 546       if (frame->label_widget)
 547         {
 548           GtkRequisition child_requisition;
 549           gfloat xalign;
 550           gint height_extra;
 551           gint x2;
 552
 553           gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 554
 555           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 556             xalign = frame->label_xalign;
 557           else
 558             xalign = 1 - frame->label_xalign;
 559
 560           height_extra = MAX (0, child_requisition.height - widget->style->ythickness);
 561           height_extra *= (1 - frame->label_yalign);
 562           y -= height_extra;
 563           height += height_extra;
 564
 565           x2 = widget->style->xthickness + (frame->child_allocation.width - child_requisition.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_SIDE_PAD;
 566
 567
 568           gtk_paint_shadow_gap (widget->style, widget->window,
 569                                 GTK_STATE_NORMAL, frame->shadow_type,
 570                                 area, widget, "frame",
 571                                 x, y, width, height,
 572                                 GTK_POS_TOP,
 573                                 x2, child_requisition.width + 2 * LABEL_PAD);
 574         }
 575        else
 576          gtk_paint_shadow (widget->style, widget->window,
 577                            GTK_STATE_NORMAL, frame->shadow_type,
 578                            area, widget, "frame",
 579                            x, y, width, height);
 580     }
 581 }
 582
 583 static gboolean
 584 gtk_frame_expose (GtkWidget      *widget,
 585                   GdkEventExpose *event)
 586 {
 587   if (GTK_WIDGET_DRAWABLE (widget))
 588     {
 589       gtk_frame_paint (widget, &event->area);
 590
 591       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 592     }
 593
 594   return FALSE;
 595 }
 596
 597 static void
 598 gtk_frame_size_request (GtkWidget      *widget,
 599                         GtkRequisition *requisition)
 600 {
 601   GtkFrame *frame = GTK_FRAME (widget);
 602   GtkBin *bin = GTK_BIN (widget);
 603   GtkRequisition child_requisition;
 604
 605   if (frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget))
 606     {
 607       gtk_widget_size_request (frame->label_widget, &child_requisition);
 608
 609       requisition->width = child_requisition.width + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 610       requisition->height =
 611         MAX (0, child_requisition.height - GTK_WIDGET (widget)->style->ythickness);
 612     }
 613   else
 614     {
 615       requisition->width = 0;
 616       requisition->height = 0;
 617     }
 618
 619   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 620     {
 621       gtk_widget_size_request (bin->child, &child_requisition);
 622
 623       requisition->width = MAX (requisition->width, child_requisition.width);
 624       requisition->height += child_requisition.height;
 625     }
 626
 627   requisition->width += (GTK_CONTAINER (widget)->border_width +
 628                          GTK_WIDGET (widget)->style->xthickness) * 2;
 629   requisition->height += (GTK_CONTAINER (widget)->border_width +
 630                           GTK_WIDGET (widget)->style->ythickness) * 2;
 631 }
 632
 633 static void
 634 gtk_frame_size_allocate (GtkWidget     *widget,
 635                          GtkAllocation *allocation)
 636 {
 637   GtkFrame *frame = GTK_FRAME (widget);
 638   GtkBin *bin = GTK_BIN (widget);
 639   GtkAllocation new_allocation;
 640
 641   widget->allocation = *allocation;
 642
 643   gtk_frame_compute_child_allocation (frame, &new_allocation);
 644
 645   /* If the child allocation changed, that means that the frame is drawn
 646    * in a new place, so we must redraw the entire widget.
 647    */
 648   if (GTK_WIDGET_MAPPED (widget) &&
 649       (new_allocation.x != frame->child_allocation.x ||
 650        new_allocation.y != frame->child_allocation.y ||
 651        new_allocation.width != frame->child_allocation.width ||
 652        new_allocation.height != frame->child_allocation.height))
 653     gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
 654
 655   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 656     gtk_widget_size_allocate (bin->child, &new_allocation);
 657
 658   frame->child_allocation = new_allocation;
 659
 660   if (frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget))
 661     {
 662       GtkRequisition child_requisition;
 663       GtkAllocation child_allocation;
 664       gfloat xalign;
 665
 666       gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 667
 668       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 669         xalign = frame->label_xalign;
 670       else
 671         xalign = 1 - frame->label_xalign;
 672
 673       child_allocation.x = frame->child_allocation.x + LABEL_SIDE_PAD +
 674         (frame->child_allocation.width - child_requisition.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_PAD;
 675       child_allocation.width = child_requisition.width;
 676
 677       child_allocation.y = frame->child_allocation.y - child_requisition.height;
 678       child_allocation.height = child_requisition.height;
 679
 680       gtk_widget_size_allocate (frame->label_widget, &child_allocation);
 681     }
 682 }
 683
 684 static void
 685 gtk_frame_compute_child_allocation (GtkFrame      *frame,
 686                                     GtkAllocation *child_allocation)
 687 {
 688   g_return_if_fail (GTK_IS_FRAME (frame));
 689   g_return_if_fail (child_allocation != NULL);
 690
 691   GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
 692 }
 693
 694 static void
 695 gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
 696                                          GtkAllocation *child_allocation)
 697 {
 698   GtkWidget *widget = GTK_WIDGET (frame);
 699   GtkAllocation *allocation = &widget->allocation;
 700   GtkRequisition child_requisition;
 701   gint top_margin;
 702
 703   if (frame->label_widget)
 704     {
 705       gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 706       top_margin = MAX (child_requisition.height, widget->style->ythickness);
 707     }
 708   else
 709     top_margin = widget->style->ythickness;
 710
 711   child_allocation->x = (GTK_CONTAINER (frame)->border_width +
 712                          widget->style->xthickness);
 713   child_allocation->width = MAX(1, (gint)allocation->width - child_allocation->x * 2);
 714
 715   child_allocation->y = (GTK_CONTAINER (frame)->border_width + top_margin);
 716   child_allocation->height = MAX (1, ((gint)allocation->height - child_allocation->y -
 717                                       (gint)GTK_CONTAINER (frame)->border_width -
 718                                       (gint)widget->style->ythickness));
 719
 720   child_allocation->x += allocation->x;
 721   child_allocation->y += allocation->y;
 722 }