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 <string.h>
  28 #include "gtkframe.h"
  29 #include "gtklabel.h"
  30 #include "gtkintl.h"
  31
  32 #define LABEL_PAD 1
  33 #define LABEL_SIDE_PAD 2
  34
  35 enum {
  36   PROP_0,
  37   PROP_LABEL,
  38   PROP_LABEL_XALIGN,
  39   PROP_LABEL_YALIGN,
  40   PROP_SHADOW,
  41   PROP_LABEL_WIDGET
  42 };
  43
  44
  45 static void gtk_frame_class_init    (GtkFrameClass  *klass);
  46 static void gtk_frame_init          (GtkFrame       *frame);
  47 static void gtk_frame_set_property (GObject      *object,
  48                                     guint         param_id,
  49                                     const GValue *value,
  50                                     GParamSpec   *pspec);
  51 static void gtk_frame_get_property (GObject     *object,
  52                                     guint        param_id,
  53                                     GValue      *value,
  54                                     GParamSpec  *pspec);
  55 static void gtk_frame_paint         (GtkWidget      *widget,
  56                                      GdkRectangle   *area);
  57 static gint gtk_frame_expose        (GtkWidget      *widget,
  58                                      GdkEventExpose *event);
  59 static void gtk_frame_size_request  (GtkWidget      *widget,
  60                                      GtkRequisition *requisition);
  61 static void gtk_frame_size_allocate (GtkWidget      *widget,
  62                                      GtkAllocation  *allocation);
  63 static void gtk_frame_map           (GtkWidget      *widget);
  64 static void gtk_frame_unmap         (GtkWidget      *widget);
  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 GtkType
  81 gtk_frame_get_type (void)
  82 {
  83   static GtkType frame_type = 0;
  84
  85   if (!frame_type)
  86     {
  87       static const GtkTypeInfo frame_info =
  88       {
  89         "GtkFrame",
  90         sizeof (GtkFrame),
  91         sizeof (GtkFrameClass),
  92         (GtkClassInitFunc) gtk_frame_class_init,
  93         (GtkObjectInitFunc) gtk_frame_init,
  94         /* reserved_1 */ NULL,
  95         /* reserved_2 */ NULL,
  96         (GtkClassInitFunc) NULL,
  97       };
  98
  99       frame_type = gtk_type_unique (gtk_bin_get_type (), &frame_info);
 100     }
 101
 102   return frame_type;
 103 }
 104
 105 static void
 106 gtk_frame_class_init (GtkFrameClass *class)
 107 {
 108   GObjectClass *gobject_class;
 109   GtkObjectClass *object_class;
 110   GtkWidgetClass *widget_class;
 111   GtkContainerClass *container_class;
 112
 113   gobject_class = (GObjectClass*) class;
 114   object_class = GTK_OBJECT_CLASS (class);
 115   widget_class = GTK_WIDGET_CLASS (class);
 116   container_class = GTK_CONTAINER_CLASS (class);
 117
 118   parent_class = gtk_type_class (gtk_bin_get_type ());
 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                                                         _("Label"),
 127                                                         _("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_double ("label_xalign",
 134                                                         _("Label xalign"),
 135                                                         _("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_double ("label_yalign",
 144                                                         _("Label yalign"),
 145                                                         _("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",
 154                                                       _("Frame shadow"),
 155                                                       _("Appearance of the frame border."),
 156                                                       GTK_TYPE_SHADOW_TYPE,
 157                                                       GTK_SHADOW_ETCHED_IN,
 158                                                       G_PARAM_READABLE | G_PARAM_WRITABLE));
 159
 160   g_object_class_install_property (gobject_class,
 161                                    PROP_LABEL_WIDGET,
 162                                    g_param_spec_object ("label_widget",
 163                                                         _("Label widget"),
 164                                                         _("A widget to display in place of the usual frame label."),
 165                                                         GTK_TYPE_WIDGET,
 166                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 167
 168   widget_class->expose_event = gtk_frame_expose;
 169   widget_class->size_request = gtk_frame_size_request;
 170   widget_class->size_allocate = gtk_frame_size_allocate;
 171   widget_class->map = gtk_frame_map;
 172   widget_class->unmap = gtk_frame_unmap;
 173
 174   container_class->remove = gtk_frame_remove;
 175   container_class->forall = gtk_frame_forall;
 176
 177   class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
 178 }
 179
 180 static void
 181 gtk_frame_init (GtkFrame *frame)
 182 {
 183   frame->label_widget = NULL;
 184   frame->shadow_type = GTK_SHADOW_ETCHED_IN;
 185   frame->label_xalign = 0.0;
 186   frame->label_yalign = 0.5;
 187 }
 188
 189 static void
 190 gtk_frame_set_property (GObject         *object,
 191                         guint            prop_id,
 192                         const GValue    *value,
 193                         GParamSpec      *pspec)
 194 {
 195   GtkFrame *frame;
 196
 197   frame = GTK_FRAME (object);
 198
 199   switch (prop_id)
 200     {
 201     case PROP_LABEL:
 202       gtk_frame_set_label (frame, g_value_get_string (value));
 203       break;
 204     case PROP_LABEL_XALIGN:
 205       gtk_frame_set_label_align (frame, g_value_get_double (value),
 206                                  frame->label_yalign);
 207       break;
 208     case PROP_LABEL_YALIGN:
 209       gtk_frame_set_label_align (frame, frame->label_xalign,
 210                                  g_value_get_double (value));
 211       break;
 212     case PROP_SHADOW:
 213       gtk_frame_set_shadow_type (frame, g_value_get_enum (value));
 214       break;
 215     case PROP_LABEL_WIDGET:
 216       gtk_frame_set_label_widget (frame, g_value_get_object (value));
 217       break;
 218     default:
 219       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 220       break;
 221     }
 222 }
 223
 224 static void
 225 gtk_frame_get_property (GObject         *object,
 226                         guint            prop_id,
 227                         GValue          *value,
 228                         GParamSpec      *pspec)
 229 {
 230   GtkFrame *frame;
 231
 232   frame = GTK_FRAME (object);
 233
 234   switch (prop_id)
 235     {
 236     case PROP_LABEL:
 237       g_value_set_string (value, gtk_frame_get_label (frame));
 238       break;
 239     case PROP_LABEL_XALIGN:
 240       g_value_set_double (value, frame->label_xalign);
 241       break;
 242     case PROP_LABEL_YALIGN:
 243       g_value_set_double (value, frame->label_yalign);
 244       break;
 245     case PROP_SHADOW:
 246       g_value_set_enum (value, frame->shadow_type);
 247       break;
 248     case PROP_LABEL_WIDGET:
 249       g_value_set_object (value,
 250                           frame->label_widget ?
 251                           G_OBJECT (frame->label_widget) : NULL);
 252       break;
 253     default:
 254       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 255       break;
 256     }
 257 }
 258
 259 GtkWidget*
 260 gtk_frame_new (const gchar *label)
 261 {
 262   GtkFrame *frame;
 263
 264   frame = gtk_type_new (gtk_frame_get_type ());
 265
 266   gtk_frame_set_label (frame, label);
 267
 268   return GTK_WIDGET (frame);
 269 }
 270
 271 static void
 272 gtk_frame_remove (GtkContainer *container,
 273                   GtkWidget    *child)
 274 {
 275   GtkFrame *frame = GTK_FRAME (container);
 276
 277   if (frame->label_widget == child)
 278     gtk_frame_set_label_widget (frame, NULL);
 279   else
 280     GTK_CONTAINER_CLASS (parent_class)->remove (container, child);
 281 }
 282
 283 static void
 284 gtk_frame_forall (GtkContainer *container,
 285                   gboolean      include_internals,
 286                   GtkCallback   callback,
 287                   gpointer      callback_data)
 288 {
 289   GtkBin *bin = GTK_BIN (container);
 290   GtkFrame *frame = GTK_FRAME (container);
 291
 292   if (bin->child)
 293     (* callback) (bin->child, callback_data);
 294
 295   if (frame->label_widget)
 296     (* callback) (frame->label_widget, callback_data);
 297 }
 298
 299 void
 300 gtk_frame_set_label (GtkFrame *frame,
 301                      const gchar *label)
 302 {
 303   g_return_if_fail (GTK_IS_FRAME (frame));
 304
 305   if (!label)
 306     {
 307       gtk_frame_set_label_widget (frame, NULL);
 308     }
 309   else
 310     {
 311       GtkWidget *child = gtk_label_new (label);
 312       gtk_widget_show (child);
 313
 314       gtk_frame_set_label_widget (frame, child);
 315     }
 316
 317   g_object_notify (G_OBJECT (frame), "label");
 318 }
 319
 320 /**
 321  * gtk_frame_get_label:
 322  * @frame: a #GtkFrame
 323  *
 324  * If the frame's label widget is a #GtkLabel, return the
 325  * text in the label widget. (The frame will have a #GtkLabel
 326  * for the label widget if a non-%NULL argument was passed
 327  * to gtk_frame_new().)
 328  *
 329  * Return value: the text in the label, or %NULL if there
 330  *               was no label widget or the lable widget was not
 331  *               a #GtkLabel. This value must be freed with g_free().
 332  **/
 333 G_CONST_RETURN gchar *
 334 gtk_frame_get_label (GtkFrame *frame)
 335 {
 336   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 337
 338   if (frame->label_widget && GTK_IS_LABEL (frame->label_widget))
 339     return gtk_label_get_text (GTK_LABEL (frame->label_widget));
 340   else
 341     return NULL;
 342 }
 343
 344 /**
 345  * gtk_frame_set_label_widget:
 346  * @frame: a #GtkFrame
 347  * @label_widget: the new label widget
 348  *
 349  * Set the label widget for the frame. This is the widget that
 350  * will appear embedded in the top edge of the frame as a
 351  * title.
 352  **/
 353 void
 354 gtk_frame_set_label_widget (GtkFrame  *frame,
 355                             GtkWidget *label_widget)
 356 {
 357   gboolean need_resize = FALSE;
 358
 359   g_return_if_fail (GTK_IS_FRAME (frame));
 360   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
 361   g_return_if_fail (label_widget == NULL || label_widget->parent == NULL);
 362
 363   if (frame->label_widget == label_widget)
 364     return;
 365
 366   if (frame->label_widget)
 367     {
 368       need_resize = GTK_WIDGET_VISIBLE (frame->label_widget);
 369       gtk_widget_unparent (frame->label_widget);
 370     }
 371
 372   frame->label_widget = label_widget;
 373
 374   if (label_widget)
 375     {
 376       frame->label_widget = label_widget;
 377       gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
 378       need_resize |= GTK_WIDGET_VISIBLE (label_widget);
 379     }
 380
 381   if (GTK_WIDGET_VISIBLE (frame) && need_resize)
 382     gtk_widget_queue_resize (GTK_WIDGET (frame));
 383
 384   g_object_notify (G_OBJECT (frame), "label_widget");
 385 }
 386
 387 /**
 388  * gtk_frame_get_label_widget:
 389  * @frame: a #GtkFrame
 390  *
 391  * Retrieves the label widget for the frame. See
 392  * gtk_frame_set_label_widget().
 393  *
 394  * Return value: the label widget, or %NULL if there is none.
 395  **/
 396 GtkWidget *
 397 gtk_frame_get_label_widget (GtkFrame *frame)
 398 {
 399   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 400
 401   return frame->label_widget;
 402 }
 403
 404 void
 405 gtk_frame_set_label_align (GtkFrame *frame,
 406                            gfloat    xalign,
 407                            gfloat    yalign)
 408 {
 409   g_return_if_fail (GTK_IS_FRAME (frame));
 410
 411   xalign = CLAMP (xalign, 0.0, 1.0);
 412   yalign = CLAMP (yalign, 0.0, 1.0);
 413
 414   if (xalign != frame->label_xalign)
 415     {
 416       frame->label_xalign = xalign;
 417       g_object_notify (G_OBJECT (frame), "label_xalign");
 418     }
 419
 420   if (yalign != frame->label_yalign)
 421     {
 422       frame->label_yalign = yalign;
 423       g_object_notify (G_OBJECT (frame), "label_yalign");
 424     }
 425
 426   gtk_widget_queue_resize (GTK_WIDGET (frame));
 427 }
 428
 429 /**
 430  * gtk_frame_get_label_align:
 431  * @frame: a #GtkFrame
 432  * @xalign: location to store X alignment of frame's label, or %NULL
 433  * @yalign: location to store X alignment of frame's label, or %NULL
 434  *
 435  * Retrieves the X and Y alignment of the frame's label. See
 436  * gtk_frame_set_label_align().
 437  **/
 438 void
 439 gtk_frame_get_label_align (GtkFrame *frame,
 440                            gfloat   *xalign,
 441                            gfloat   *yalign)
 442 {
 443   g_return_if_fail (GTK_IS_FRAME (frame));
 444
 445   if (xalign)
 446     *xalign = frame->label_xalign;
 447   if (yalign)
 448     *yalign = frame->label_yalign;
 449 }
 450
 451 void
 452 gtk_frame_set_shadow_type (GtkFrame      *frame,
 453                            GtkShadowType  type)
 454 {
 455   g_return_if_fail (GTK_IS_FRAME (frame));
 456
 457   if ((GtkShadowType) frame->shadow_type != type)
 458     {
 459       frame->shadow_type = type;
 460       g_object_notify (G_OBJECT (frame), "shadow");
 461
 462       if (GTK_WIDGET_DRAWABLE (frame))
 463         {
 464           gtk_widget_queue_clear (GTK_WIDGET (frame));
 465         }
 466
 467       gtk_widget_queue_resize (GTK_WIDGET (frame));
 468     }
 469 }
 470
 471 /**
 472  * gtk_frame_get_shadow_type:
 473  * @frame: a #GtkFrame
 474  *
 475  * Retrieves the shadow type of the frame. See
 476  * gtk_frame_set_shadow_type().
 477  *
 478  * Return value: the current shadow type of the frame.
 479  **/
 480 GtkShadowType
 481 gtk_frame_get_shadow_type (GtkFrame *frame)
 482 {
 483   g_return_val_if_fail (GTK_IS_FRAME (frame), GTK_SHADOW_ETCHED_IN);
 484
 485   return frame->shadow_type;
 486 }
 487
 488 static void
 489 gtk_frame_paint (GtkWidget    *widget,
 490                  GdkRectangle *area)
 491 {
 492   GtkFrame *frame;
 493   gint x, y, width, height;
 494
 495   if (GTK_WIDGET_DRAWABLE (widget))
 496     {
 497       frame = GTK_FRAME (widget);
 498
 499       x = frame->child_allocation.x - widget->style->xthickness;
 500       y = frame->child_allocation.y - widget->style->ythickness;
 501       width = frame->child_allocation.width + 2 * widget->style->xthickness;
 502       height =  frame->child_allocation.height + 2 * widget->style->ythickness;
 503
 504       if (frame->label_widget)
 505         {
 506           GtkRequisition child_requisition;
 507           gfloat xalign;
 508           gint height_extra;
 509           gint x2;
 510
 511           gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 512
 513           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 514             xalign = frame->label_xalign;
 515           else
 516             xalign = 1 - frame->label_xalign;
 517
 518           height_extra = MAX (0, child_requisition.height - widget->style->xthickness);
 519           y -= height_extra * (1 - frame->label_yalign);
 520           height += height_extra * (1 - frame->label_yalign);
 521
 522           x2 = widget->style->xthickness + (frame->child_allocation.width - child_requisition.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_SIDE_PAD;
 523
 524
 525           gtk_paint_shadow_gap (widget->style, widget->window,
 526                                 GTK_STATE_NORMAL, frame->shadow_type,
 527                                 area, widget, "frame",
 528                                 x, y, width, height,
 529                                 GTK_POS_TOP,
 530                                 x2, child_requisition.width + 2 * LABEL_PAD);
 531         }
 532        else
 533          gtk_paint_shadow (widget->style, widget->window,
 534                            GTK_STATE_NORMAL, frame->shadow_type,
 535                            area, widget, "frame",
 536                            x, y, width, height);
 537     }
 538 }
 539
 540 static gboolean
 541 gtk_frame_expose (GtkWidget      *widget,
 542                   GdkEventExpose *event)
 543 {
 544   if (GTK_WIDGET_DRAWABLE (widget))
 545     {
 546       gtk_frame_paint (widget, &event->area);
 547
 548       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 549     }
 550
 551   return FALSE;
 552 }
 553
 554 static void
 555 gtk_frame_size_request (GtkWidget      *widget,
 556                         GtkRequisition *requisition)
 557 {
 558   GtkFrame *frame = GTK_FRAME (widget);
 559   GtkBin *bin = GTK_BIN (widget);
 560   GtkRequisition child_requisition;
 561
 562   if (frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget))
 563     {
 564       gtk_widget_size_request (frame->label_widget, &child_requisition);
 565
 566       requisition->width = child_requisition.width + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 567       requisition->height =
 568         MAX (0, child_requisition.height - GTK_WIDGET (widget)->style->xthickness);
 569     }
 570   else
 571     {
 572       requisition->width = 0;
 573       requisition->height = 0;
 574     }
 575
 576   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 577     {
 578       gtk_widget_size_request (bin->child, &child_requisition);
 579
 580       requisition->width = MAX (requisition->width, child_requisition.width);
 581       requisition->height += child_requisition.height;
 582     }
 583
 584   requisition->width += (GTK_CONTAINER (widget)->border_width +
 585                          GTK_WIDGET (widget)->style->xthickness) * 2;
 586   requisition->height += (GTK_CONTAINER (widget)->border_width +
 587                           GTK_WIDGET (widget)->style->ythickness) * 2;
 588 }
 589
 590 static void
 591 gtk_frame_size_allocate (GtkWidget     *widget,
 592                          GtkAllocation *allocation)
 593 {
 594   GtkFrame *frame = GTK_FRAME (widget);
 595   GtkBin *bin = GTK_BIN (widget);
 596   GtkAllocation new_allocation;
 597
 598   widget->allocation = *allocation;
 599
 600   gtk_frame_compute_child_allocation (frame, &new_allocation);
 601
 602   /* If the child allocation changed, that means that the frame is drawn
 603    * in a new place, so we must redraw the entire widget.
 604    */
 605   if (GTK_WIDGET_MAPPED (widget) &&
 606       (new_allocation.x != frame->child_allocation.x ||
 607        new_allocation.y != frame->child_allocation.y ||
 608        new_allocation.width != frame->child_allocation.width ||
 609        new_allocation.height != frame->child_allocation.height))
 610     gtk_widget_queue_clear (widget);
 611
 612   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 613     gtk_widget_size_allocate (bin->child, &new_allocation);
 614
 615   frame->child_allocation = new_allocation;
 616
 617   if (frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget))
 618     {
 619       GtkRequisition child_requisition;
 620       GtkAllocation child_allocation;
 621       gfloat xalign;
 622
 623       gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 624
 625       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 626         xalign = frame->label_xalign;
 627       else
 628         xalign = 1 - frame->label_xalign;
 629
 630       child_allocation.x = frame->child_allocation.x + LABEL_SIDE_PAD +
 631         (frame->child_allocation.width - child_requisition.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_PAD;
 632       child_allocation.width = child_requisition.width;
 633
 634       child_allocation.y = frame->child_allocation.y - child_requisition.height;
 635       child_allocation.height = child_requisition.height;
 636
 637       gtk_widget_size_allocate (frame->label_widget, &child_allocation);
 638     }
 639 }
 640
 641 static void
 642 gtk_frame_map (GtkWidget *widget)
 643 {
 644   GtkFrame *frame = GTK_FRAME (widget);
 645
 646   if (frame->label_widget &&
 647       GTK_WIDGET_VISIBLE (frame->label_widget) &&
 648       !GTK_WIDGET_MAPPED (frame->label_widget))
 649     gtk_widget_map (frame->label_widget);
 650
 651   if (GTK_WIDGET_CLASS (parent_class)->map)
 652     (* GTK_WIDGET_CLASS (parent_class)->map) (widget);
 653 }
 654
 655 static void
 656 gtk_frame_unmap (GtkWidget *widget)
 657 {
 658   GtkFrame *frame = GTK_FRAME (widget);
 659
 660   if (GTK_WIDGET_CLASS (parent_class)->unmap)
 661     (* GTK_WIDGET_CLASS (parent_class)->unmap) (widget);
 662
 663   if (frame->label_widget && GTK_WIDGET_MAPPED (frame->label_widget))
 664     gtk_widget_unmap (frame->label_widget);
 665 }
 666
 667 static void
 668 gtk_frame_compute_child_allocation (GtkFrame      *frame,
 669                                     GtkAllocation *child_allocation)
 670 {
 671   g_return_if_fail (GTK_IS_FRAME (frame));
 672   g_return_if_fail (child_allocation != NULL);
 673
 674   GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
 675 }
 676
 677 static void
 678 gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
 679                                          GtkAllocation *child_allocation)
 680 {
 681   GtkWidget *widget = GTK_WIDGET (frame);
 682   GtkAllocation *allocation = &widget->allocation;
 683   GtkRequisition child_requisition;
 684   gint top_margin;
 685
 686   if (frame->label_widget)
 687     {
 688       gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 689       top_margin = MAX (child_requisition.height, widget->style->ythickness);
 690     }
 691   else
 692     top_margin = widget->style->ythickness;
 693
 694   child_allocation->x = (GTK_CONTAINER (frame)->border_width +
 695                          widget->style->xthickness);
 696   child_allocation->width = MAX(1, (gint)allocation->width - child_allocation->x * 2);
 697
 698   child_allocation->y = (GTK_CONTAINER (frame)->border_width + top_margin);
 699   child_allocation->height = MAX (1, ((gint)allocation->height - child_allocation->y -
 700                                       (gint)GTK_CONTAINER (frame)->border_width -
 701                                       (gint)widget->style->ythickness));
 702
 703   child_allocation->x += allocation->x;
 704   child_allocation->y += allocation->y;
 705 }