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 "gtkprivate.h"
  32 #include "gtkintl.h"
  33 #include "gtkbuildable.h"
  34 #include "gtkalias.h"
  35
  36 #define LABEL_PAD 1
  37 #define LABEL_SIDE_PAD 2
  38
  39 enum {
  40   PROP_0,
  41   PROP_LABEL,
  42   PROP_LABEL_XALIGN,
  43   PROP_LABEL_YALIGN,
  44   PROP_SHADOW,
  45   PROP_SHADOW_TYPE,
  46   PROP_LABEL_WIDGET
  47 };
  48
  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 /* GtkBuildable */
  78 static void gtk_frame_buildable_init                (GtkBuildableIface *iface);
  79 static void gtk_frame_buildable_add_child           (GtkBuildable *buildable,
  80                                                      GtkBuilder   *builder,
  81                                                      GObject      *child,
  82                                                      const gchar  *type);
  83
  84 G_DEFINE_TYPE_WITH_CODE (GtkFrame, gtk_frame, GTK_TYPE_BIN,
  85                          G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
  86                                                 gtk_frame_buildable_init))
  87
  88 static void
  89 gtk_frame_class_init (GtkFrameClass *class)
  90 {
  91   GObjectClass *gobject_class;
  92   GtkWidgetClass *widget_class;
  93   GtkContainerClass *container_class;
  94
  95   gobject_class = (GObjectClass*) class;
  96   widget_class = GTK_WIDGET_CLASS (class);
  97   container_class = GTK_CONTAINER_CLASS (class);
  98
  99   gobject_class->set_property = gtk_frame_set_property;
 100   gobject_class->get_property = gtk_frame_get_property;
 101
 102   g_object_class_install_property (gobject_class,
 103                                    PROP_LABEL,
 104                                    g_param_spec_string ("label",
 105                                                         P_("Label"),
 106                                                         P_("Text of the frame's label"),
 107                                                         NULL,
 108                                                         GTK_PARAM_READABLE |
 109                                                         GTK_PARAM_WRITABLE));
 110   g_object_class_install_property (gobject_class,
 111                                    PROP_LABEL_XALIGN,
 112                                    g_param_spec_float ("label-xalign",
 113                                                        P_("Label xalign"),
 114                                                        P_("The horizontal alignment of the label"),
 115                                                        0.0,
 116                                                        1.0,
 117                                                        0.0,
 118                                                        GTK_PARAM_READWRITE));
 119   g_object_class_install_property (gobject_class,
 120                                    PROP_LABEL_YALIGN,
 121                                    g_param_spec_float ("label-yalign",
 122                                                        P_("Label yalign"),
 123                                                        P_("The vertical alignment of the label"),
 124                                                        0.0,
 125                                                        1.0,
 126                                                        0.5,
 127                                                        GTK_PARAM_READWRITE));
 128   g_object_class_install_property (gobject_class,
 129                                    PROP_SHADOW,
 130                                    g_param_spec_enum ("shadow", NULL,
 131                                                       P_("Deprecated property, use shadow_type instead"),
 132                                                       GTK_TYPE_SHADOW_TYPE,
 133                                                       GTK_SHADOW_ETCHED_IN,
 134                                                       GTK_PARAM_READWRITE));
 135   g_object_class_install_property (gobject_class,
 136                                    PROP_SHADOW_TYPE,
 137                                    g_param_spec_enum ("shadow-type",
 138                                                       P_("Frame shadow"),
 139                                                       P_("Appearance of the frame border"),
 140                                                       GTK_TYPE_SHADOW_TYPE,
 141                                                       GTK_SHADOW_ETCHED_IN,
 142                                                       GTK_PARAM_READWRITE));
 143
 144   g_object_class_install_property (gobject_class,
 145                                    PROP_LABEL_WIDGET,
 146                                    g_param_spec_object ("label-widget",
 147                                                         P_("Label widget"),
 148                                                         P_("A widget to display in place of the usual frame label"),
 149                                                         GTK_TYPE_WIDGET,
 150                                                         GTK_PARAM_READWRITE));
 151
 152   widget_class->expose_event = gtk_frame_expose;
 153   widget_class->size_request = gtk_frame_size_request;
 154   widget_class->size_allocate = gtk_frame_size_allocate;
 155
 156   container_class->remove = gtk_frame_remove;
 157   container_class->forall = gtk_frame_forall;
 158
 159   class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
 160 }
 161
 162 static void
 163 gtk_frame_buildable_init (GtkBuildableIface *iface)
 164 {
 165   iface->add_child = gtk_frame_buildable_add_child;
 166 }
 167
 168 static void
 169 gtk_frame_buildable_add_child (GtkBuildable *buildable,
 170                                GtkBuilder   *builder,
 171                                GObject      *child,
 172                                const gchar  *type)
 173 {
 174   if (type && strcmp (type, "label") == 0)
 175     gtk_frame_set_label_widget (GTK_FRAME (buildable), GTK_WIDGET (child));
 176   else if (!type)
 177     gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
 178   else
 179     GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_FRAME (buildable), type);
 180 }
 181
 182 static void
 183 gtk_frame_init (GtkFrame *frame)
 184 {
 185   frame->label_widget = NULL;
 186   frame->shadow_type = GTK_SHADOW_ETCHED_IN;
 187   frame->label_xalign = 0.0;
 188   frame->label_yalign = 0.5;
 189 }
 190
 191 static void
 192 gtk_frame_set_property (GObject         *object,
 193                         guint            prop_id,
 194                         const GValue    *value,
 195                         GParamSpec      *pspec)
 196 {
 197   GtkFrame *frame;
 198
 199   frame = GTK_FRAME (object);
 200
 201   switch (prop_id)
 202     {
 203     case PROP_LABEL:
 204       gtk_frame_set_label (frame, g_value_get_string (value));
 205       break;
 206     case PROP_LABEL_XALIGN:
 207       gtk_frame_set_label_align (frame, g_value_get_float (value),
 208                                  frame->label_yalign);
 209       break;
 210     case PROP_LABEL_YALIGN:
 211       gtk_frame_set_label_align (frame, frame->label_xalign,
 212                                  g_value_get_float (value));
 213       break;
 214     case PROP_SHADOW:
 215     case PROP_SHADOW_TYPE:
 216       gtk_frame_set_shadow_type (frame, g_value_get_enum (value));
 217       break;
 218     case PROP_LABEL_WIDGET:
 219       gtk_frame_set_label_widget (frame, g_value_get_object (value));
 220       break;
 221     default:
 222       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 223       break;
 224     }
 225 }
 226
 227 static void
 228 gtk_frame_get_property (GObject         *object,
 229                         guint            prop_id,
 230                         GValue          *value,
 231                         GParamSpec      *pspec)
 232 {
 233   GtkFrame *frame;
 234
 235   frame = GTK_FRAME (object);
 236
 237   switch (prop_id)
 238     {
 239     case PROP_LABEL:
 240       g_value_set_string (value, gtk_frame_get_label (frame));
 241       break;
 242     case PROP_LABEL_XALIGN:
 243       g_value_set_float (value, frame->label_xalign);
 244       break;
 245     case PROP_LABEL_YALIGN:
 246       g_value_set_float (value, frame->label_yalign);
 247       break;
 248     case PROP_SHADOW:
 249     case PROP_SHADOW_TYPE:
 250       g_value_set_enum (value, frame->shadow_type);
 251       break;
 252     case PROP_LABEL_WIDGET:
 253       g_value_set_object (value,
 254                           frame->label_widget ?
 255                           G_OBJECT (frame->label_widget) : NULL);
 256       break;
 257     default:
 258       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 259       break;
 260     }
 261 }
 262
 263 /**
 264  * gtk_frame_new:
 265  * @label: the text to use as the label of the frame
 266  *
 267  * Creates a new #GtkFrame, with optional label @label.
 268  * If @label is %NULL, the label is omitted.
 269  *
 270  * Return value: a new #GtkFrame widget
 271  **/
 272 GtkWidget*
 273 gtk_frame_new (const gchar *label)
 274 {
 275   return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
 276 }
 277
 278 static void
 279 gtk_frame_remove (GtkContainer *container,
 280                   GtkWidget    *child)
 281 {
 282   GtkFrame *frame = GTK_FRAME (container);
 283
 284   if (frame->label_widget == child)
 285     gtk_frame_set_label_widget (frame, NULL);
 286   else
 287     GTK_CONTAINER_CLASS (gtk_frame_parent_class)->remove (container, child);
 288 }
 289
 290 static void
 291 gtk_frame_forall (GtkContainer *container,
 292                   gboolean      include_internals,
 293                   GtkCallback   callback,
 294                   gpointer      callback_data)
 295 {
 296   GtkBin *bin = GTK_BIN (container);
 297   GtkFrame *frame = GTK_FRAME (container);
 298
 299   if (bin->child)
 300     (* callback) (bin->child, callback_data);
 301
 302   if (frame->label_widget)
 303     (* callback) (frame->label_widget, callback_data);
 304 }
 305
 306 /**
 307  * gtk_frame_set_label:
 308  * @frame: a #GtkFrame
 309  * @label: (allow-none): the text to use as the label of the frame
 310  *
 311  * Sets the text of the label. If @label is %NULL,
 312  * the current label is removed.
 313  **/
 314 void
 315 gtk_frame_set_label (GtkFrame *frame,
 316                      const gchar *label)
 317 {
 318   g_return_if_fail (GTK_IS_FRAME (frame));
 319
 320   if (!label)
 321     {
 322       gtk_frame_set_label_widget (frame, NULL);
 323     }
 324   else
 325     {
 326       GtkWidget *child = gtk_label_new (label);
 327       gtk_widget_show (child);
 328
 329       gtk_frame_set_label_widget (frame, child);
 330     }
 331 }
 332
 333 /**
 334  * gtk_frame_get_label:
 335  * @frame: a #GtkFrame
 336  *
 337  * If the frame's label widget is a #GtkLabel, returns the
 338  * text in the label widget. (The frame will have a #GtkLabel
 339  * for the label widget if a non-%NULL argument was passed
 340  * to gtk_frame_new().)
 341  *
 342  * Return value: the text in the label, or %NULL if there
 343  *               was no label widget or the lable widget was not
 344  *               a #GtkLabel. This string is owned by GTK+ and
 345  *               must not be modified or freed.
 346  **/
 347 G_CONST_RETURN gchar *
 348 gtk_frame_get_label (GtkFrame *frame)
 349 {
 350   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 351
 352   if (GTK_IS_LABEL (frame->label_widget))
 353     return gtk_label_get_text (GTK_LABEL (frame->label_widget));
 354   else
 355     return NULL;
 356 }
 357
 358 /**
 359  * gtk_frame_set_label_widget:
 360  * @frame: a #GtkFrame
 361  * @label_widget: the new label widget
 362  *
 363  * Sets the label widget for the frame. This is the widget that
 364  * will appear embedded in the top edge of the frame as a
 365  * title.
 366  **/
 367 void
 368 gtk_frame_set_label_widget (GtkFrame  *frame,
 369                             GtkWidget *label_widget)
 370 {
 371   gboolean need_resize = FALSE;
 372
 373   g_return_if_fail (GTK_IS_FRAME (frame));
 374   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
 375   g_return_if_fail (label_widget == NULL || label_widget->parent == NULL);
 376
 377   if (frame->label_widget == label_widget)
 378     return;
 379
 380   if (frame->label_widget)
 381     {
 382       need_resize = gtk_widget_get_visible (frame->label_widget);
 383       gtk_widget_unparent (frame->label_widget);
 384     }
 385
 386   frame->label_widget = label_widget;
 387
 388   if (label_widget)
 389     {
 390       frame->label_widget = label_widget;
 391       gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
 392       need_resize |= gtk_widget_get_visible (label_widget);
 393     }
 394
 395   if (gtk_widget_get_visible (GTK_WIDGET (frame)) && need_resize)
 396     gtk_widget_queue_resize (GTK_WIDGET (frame));
 397
 398   g_object_freeze_notify (G_OBJECT (frame));
 399   g_object_notify (G_OBJECT (frame), "label-widget");
 400   g_object_notify (G_OBJECT (frame), "label");
 401   g_object_thaw_notify (G_OBJECT (frame));
 402 }
 403
 404 /**
 405  * gtk_frame_get_label_widget:
 406  * @frame: a #GtkFrame
 407  *
 408  * Retrieves the label widget for the frame. See
 409  * gtk_frame_set_label_widget().
 410  *
 411  * Return value: the label widget, or %NULL if there is none.
 412  **/
 413 GtkWidget *
 414 gtk_frame_get_label_widget (GtkFrame *frame)
 415 {
 416   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 417
 418   return frame->label_widget;
 419 }
 420
 421 /**
 422  * gtk_frame_set_label_align:
 423  * @frame: a #GtkFrame
 424  * @xalign: The position of the label along the top edge
 425  *   of the widget. A value of 0.0 represents left alignment;
 426  *   1.0 represents right alignment.
 427  * @yalign: The y alignment of the label. A value of 0.0 aligns under
 428  *   the frame; 1.0 aligns above the frame. If the values are exactly
 429  *   0.0 or 1.0 the gap in the frame won't be painted because the label
 430  *   will be completely above or below the frame.
 431  *
 432  * Sets the alignment of the frame widget's label. The
 433  * default values for a newly created frame are 0.0 and 0.5.
 434  **/
 435 void
 436 gtk_frame_set_label_align (GtkFrame *frame,
 437                            gfloat    xalign,
 438                            gfloat    yalign)
 439 {
 440   g_return_if_fail (GTK_IS_FRAME (frame));
 441
 442   xalign = CLAMP (xalign, 0.0, 1.0);
 443   yalign = CLAMP (yalign, 0.0, 1.0);
 444
 445   g_object_freeze_notify (G_OBJECT (frame));
 446   if (xalign != frame->label_xalign)
 447     {
 448       frame->label_xalign = xalign;
 449       g_object_notify (G_OBJECT (frame), "label-xalign");
 450     }
 451
 452   if (yalign != frame->label_yalign)
 453     {
 454       frame->label_yalign = yalign;
 455       g_object_notify (G_OBJECT (frame), "label-yalign");
 456     }
 457
 458   g_object_thaw_notify (G_OBJECT (frame));
 459   gtk_widget_queue_resize (GTK_WIDGET (frame));
 460 }
 461
 462 /**
 463  * gtk_frame_get_label_align:
 464  * @frame: a #GtkFrame
 465  * @xalign: (allow-none): location to store X alignment of frame's label, or %NULL
 466  * @yalign: (allow-none): location to store X alignment of frame's label, or %NULL
 467  *
 468  * Retrieves the X and Y alignment of the frame's label. See
 469  * gtk_frame_set_label_align().
 470  **/
 471 void
 472 gtk_frame_get_label_align (GtkFrame *frame,
 473                            gfloat   *xalign,
 474                            gfloat   *yalign)
 475 {
 476   g_return_if_fail (GTK_IS_FRAME (frame));
 477
 478   if (xalign)
 479     *xalign = frame->label_xalign;
 480   if (yalign)
 481     *yalign = frame->label_yalign;
 482 }
 483
 484 /**
 485  * gtk_frame_set_shadow_type:
 486  * @frame: a #GtkFrame
 487  * @type: the new #GtkShadowType
 488  *
 489  * Sets the shadow type for @frame.
 490  **/
 491 void
 492 gtk_frame_set_shadow_type (GtkFrame      *frame,
 493                            GtkShadowType  type)
 494 {
 495   GtkWidget *widget;
 496
 497   g_return_if_fail (GTK_IS_FRAME (frame));
 498
 499   if ((GtkShadowType) frame->shadow_type != type)
 500     {
 501       widget = GTK_WIDGET (frame);
 502       frame->shadow_type = type;
 503       g_object_notify (G_OBJECT (frame), "shadow-type");
 504
 505       if (gtk_widget_is_drawable (widget))
 506         {
 507           gtk_widget_queue_draw (widget);
 508         }
 509
 510       gtk_widget_queue_resize (widget);
 511     }
 512 }
 513
 514 /**
 515  * gtk_frame_get_shadow_type:
 516  * @frame: a #GtkFrame
 517  *
 518  * Retrieves the shadow type of the frame. See
 519  * gtk_frame_set_shadow_type().
 520  *
 521  * Return value: the current shadow type of the frame.
 522  **/
 523 GtkShadowType
 524 gtk_frame_get_shadow_type (GtkFrame *frame)
 525 {
 526   g_return_val_if_fail (GTK_IS_FRAME (frame), GTK_SHADOW_ETCHED_IN);
 527
 528   return frame->shadow_type;
 529 }
 530
 531 static void
 532 gtk_frame_paint (GtkWidget    *widget,
 533                  GdkRectangle *area)
 534 {
 535   GtkFrame *frame;
 536   gint x, y, width, height;
 537
 538   if (gtk_widget_is_drawable (widget))
 539     {
 540       frame = GTK_FRAME (widget);
 541
 542       x = frame->child_allocation.x - widget->style->xthickness;
 543       y = frame->child_allocation.y - widget->style->ythickness;
 544       width = frame->child_allocation.width + 2 * widget->style->xthickness;
 545       height =  frame->child_allocation.height + 2 * widget->style->ythickness;
 546
 547       if (frame->label_widget)
 548         {
 549           GtkRequisition child_requisition;
 550           gfloat xalign;
 551           gint height_extra;
 552           gint x2;
 553
 554           gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 555
 556           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 557             xalign = frame->label_xalign;
 558           else
 559             xalign = 1 - frame->label_xalign;
 560
 561           height_extra = MAX (0, child_requisition.height - widget->style->ythickness)
 562             - frame->label_yalign * child_requisition.height;
 563           y -= height_extra;
 564           height += height_extra;
 565
 566           x2 = widget->style->xthickness + (frame->child_allocation.width - child_requisition.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_SIDE_PAD;
 567
 568           /* If the label is completely over or under the frame we can omit the gap */
 569           if (frame->label_yalign == 0.0 || frame->label_yalign == 1.0)
 570             gtk_paint_shadow (widget->style, widget->window,
 571                               widget->state, frame->shadow_type,
 572                               area, widget, "frame",
 573                               x, y, width, height);
 574           else
 575             gtk_paint_shadow_gap (widget->style, widget->window,
 576                                   widget->state, frame->shadow_type,
 577                                   area, widget, "frame",
 578                                   x, y, width, height,
 579                                   GTK_POS_TOP,
 580                                   x2, child_requisition.width + 2 * LABEL_PAD);
 581         }
 582        else
 583          gtk_paint_shadow (widget->style, widget->window,
 584                            widget->state, frame->shadow_type,
 585                            area, widget, "frame",
 586                            x, y, width, height);
 587     }
 588 }
 589
 590 static gboolean
 591 gtk_frame_expose (GtkWidget      *widget,
 592                   GdkEventExpose *event)
 593 {
 594   if (gtk_widget_is_drawable (widget))
 595     {
 596       gtk_frame_paint (widget, &event->area);
 597
 598       GTK_WIDGET_CLASS (gtk_frame_parent_class)->expose_event (widget, event);
 599     }
 600
 601   return FALSE;
 602 }
 603
 604 static void
 605 gtk_frame_size_request (GtkWidget      *widget,
 606                         GtkRequisition *requisition)
 607 {
 608   GtkFrame *frame = GTK_FRAME (widget);
 609   GtkBin *bin = GTK_BIN (widget);
 610   GtkRequisition child_requisition;
 611
 612   if (frame->label_widget && gtk_widget_get_visible (frame->label_widget))
 613     {
 614       gtk_widget_size_request (frame->label_widget, &child_requisition);
 615
 616       requisition->width = child_requisition.width + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 617       requisition->height =
 618         MAX (0, child_requisition.height - widget->style->ythickness);
 619     }
 620   else
 621     {
 622       requisition->width = 0;
 623       requisition->height = 0;
 624     }
 625
 626   if (bin->child && gtk_widget_get_visible (bin->child))
 627     {
 628       gtk_widget_size_request (bin->child, &child_requisition);
 629
 630       requisition->width = MAX (requisition->width, child_requisition.width);
 631       requisition->height += child_requisition.height;
 632     }
 633
 634   requisition->width += (GTK_CONTAINER (widget)->border_width +
 635                          GTK_WIDGET (widget)->style->xthickness) * 2;
 636   requisition->height += (GTK_CONTAINER (widget)->border_width +
 637                           GTK_WIDGET (widget)->style->ythickness) * 2;
 638 }
 639
 640 static void
 641 gtk_frame_size_allocate (GtkWidget     *widget,
 642                          GtkAllocation *allocation)
 643 {
 644   GtkFrame *frame = GTK_FRAME (widget);
 645   GtkBin *bin = GTK_BIN (widget);
 646   GtkAllocation new_allocation;
 647
 648   widget->allocation = *allocation;
 649
 650   gtk_frame_compute_child_allocation (frame, &new_allocation);
 651
 652   /* If the child allocation changed, that means that the frame is drawn
 653    * in a new place, so we must redraw the entire widget.
 654    */
 655   if (GTK_WIDGET_MAPPED (widget) &&
 656       (new_allocation.x != frame->child_allocation.x ||
 657        new_allocation.y != frame->child_allocation.y ||
 658        new_allocation.width != frame->child_allocation.width ||
 659        new_allocation.height != frame->child_allocation.height))
 660     gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
 661
 662   if (bin->child && gtk_widget_get_visible (bin->child))
 663     gtk_widget_size_allocate (bin->child, &new_allocation);
 664
 665   frame->child_allocation = new_allocation;
 666
 667   if (frame->label_widget && gtk_widget_get_visible (frame->label_widget))
 668     {
 669       GtkRequisition child_requisition;
 670       GtkAllocation child_allocation;
 671       gfloat xalign;
 672
 673       gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 674
 675       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 676         xalign = frame->label_xalign;
 677       else
 678         xalign = 1 - frame->label_xalign;
 679
 680       child_allocation.x = frame->child_allocation.x + LABEL_SIDE_PAD +
 681         (frame->child_allocation.width - child_requisition.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_PAD;
 682       child_allocation.width = MIN (child_requisition.width, new_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD);
 683
 684       child_allocation.y = frame->child_allocation.y - MAX (child_requisition.height, widget->style->ythickness);
 685       child_allocation.height = child_requisition.height;
 686
 687       gtk_widget_size_allocate (frame->label_widget, &child_allocation);
 688     }
 689 }
 690
 691 static void
 692 gtk_frame_compute_child_allocation (GtkFrame      *frame,
 693                                     GtkAllocation *child_allocation)
 694 {
 695   g_return_if_fail (GTK_IS_FRAME (frame));
 696   g_return_if_fail (child_allocation != NULL);
 697
 698   GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
 699 }
 700
 701 static void
 702 gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
 703                                          GtkAllocation *child_allocation)
 704 {
 705   GtkWidget *widget = GTK_WIDGET (frame);
 706   GtkAllocation *allocation = &widget->allocation;
 707   GtkRequisition child_requisition;
 708   gint top_margin;
 709
 710   if (frame->label_widget)
 711     {
 712       gtk_widget_get_child_requisition (frame->label_widget, &child_requisition);
 713       top_margin = MAX (child_requisition.height, widget->style->ythickness);
 714     }
 715   else
 716     top_margin = widget->style->ythickness;
 717
 718   child_allocation->x = (GTK_CONTAINER (frame)->border_width +
 719                          widget->style->xthickness);
 720   child_allocation->width = MAX(1, (gint)allocation->width - child_allocation->x * 2);
 721
 722   child_allocation->y = (GTK_CONTAINER (frame)->border_width + top_margin);
 723   child_allocation->height = MAX (1, ((gint)allocation->height - child_allocation->y -
 724                                       (gint)GTK_CONTAINER (frame)->border_width -
 725                                       (gint)widget->style->ythickness));
 726
 727   child_allocation->x += allocation->x;
 728   child_allocation->y += allocation->y;
 729 }
 730
 731 #define __GTK_FRAME_C__
 732 #include "gtkaliasdef.c"