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