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 "gtktypebuiltins.h"
  33 #include "gtkintl.h"
  34 #include "gtkbuildable.h"
  35
  36
  37 #define LABEL_PAD 1
  38 #define LABEL_SIDE_PAD 2
  39
  40 struct _GtkFramePrivate
  41 {
  42   /* Properties */
  43   GtkWidget *label_widget;
  44
  45   gint16 shadow_type;
  46   gfloat label_xalign;
  47   gfloat label_yalign;
  48   /* Properties */
  49
  50   GtkAllocation child_allocation;
  51   GtkAllocation label_allocation;
  52 };
  53
  54 enum {
  55   PROP_0,
  56   PROP_LABEL,
  57   PROP_LABEL_XALIGN,
  58   PROP_LABEL_YALIGN,
  59   PROP_SHADOW_TYPE,
  60   PROP_LABEL_WIDGET
  61 };
  62
  63 static void gtk_frame_set_property (GObject      *object,
  64                                     guint         param_id,
  65                                     const GValue *value,
  66                                     GParamSpec   *pspec);
  67 static void gtk_frame_get_property (GObject     *object,
  68                                     guint        param_id,
  69                                     GValue      *value,
  70                                     GParamSpec  *pspec);
  71 static gboolean gtk_frame_draw      (GtkWidget      *widget,
  72                                      cairo_t        *cr);
  73 static void gtk_frame_size_allocate (GtkWidget      *widget,
  74                                      GtkAllocation  *allocation);
  75 static void gtk_frame_remove        (GtkContainer   *container,
  76                                      GtkWidget      *child);
  77 static void gtk_frame_forall        (GtkContainer   *container,
  78                                      gboolean        include_internals,
  79                                      GtkCallback     callback,
  80                                      gpointer        callback_data);
  81
  82 static void gtk_frame_compute_child_allocation      (GtkFrame      *frame,
  83                                                      GtkAllocation *child_allocation);
  84 static void gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
  85                                                      GtkAllocation *child_allocation);
  86
  87 /* GtkBuildable */
  88 static void gtk_frame_buildable_init                (GtkBuildableIface *iface);
  89 static void gtk_frame_buildable_add_child           (GtkBuildable *buildable,
  90                                                      GtkBuilder   *builder,
  91                                                      GObject      *child,
  92                                                      const gchar  *type);
  93
  94 static void gtk_frame_get_preferred_width           (GtkWidget           *widget,
  95                                                      gint                *minimum_size,
  96                                                      gint                *natural_size);
  97 static void gtk_frame_get_preferred_height          (GtkWidget           *widget,
  98                                                      gint                *minimum_size,
  99                                                      gint                *natural_size);
 100 static void gtk_frame_get_preferred_height_for_width(GtkWidget           *layout,
 101                                                      gint                 width,
 102                                                      gint                *minimum_height,
 103                                                      gint                *natural_height);
 104 static void gtk_frame_get_preferred_width_for_height(GtkWidget           *layout,
 105                                                      gint                 width,
 106                                                      gint                *minimum_height,
 107                                                      gint                *natural_height);
 108
 109
 110 G_DEFINE_TYPE_WITH_CODE (GtkFrame, gtk_frame, GTK_TYPE_BIN,
 111                          G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
 112                                                 gtk_frame_buildable_init))
 113
 114 static void
 115 gtk_frame_class_init (GtkFrameClass *class)
 116 {
 117   GObjectClass *gobject_class;
 118   GtkWidgetClass *widget_class;
 119   GtkContainerClass *container_class;
 120
 121   gobject_class = (GObjectClass*) class;
 122   widget_class = GTK_WIDGET_CLASS (class);
 123   container_class = GTK_CONTAINER_CLASS (class);
 124
 125   gobject_class->set_property = gtk_frame_set_property;
 126   gobject_class->get_property = gtk_frame_get_property;
 127
 128   g_object_class_install_property (gobject_class,
 129                                    PROP_LABEL,
 130                                    g_param_spec_string ("label",
 131                                                         P_("Label"),
 132                                                         P_("Text of the frame's label"),
 133                                                         NULL,
 134                                                         GTK_PARAM_READABLE |
 135                                                         GTK_PARAM_WRITABLE));
 136   g_object_class_install_property (gobject_class,
 137                                    PROP_LABEL_XALIGN,
 138                                    g_param_spec_float ("label-xalign",
 139                                                        P_("Label xalign"),
 140                                                        P_("The horizontal alignment of the label"),
 141                                                        0.0,
 142                                                        1.0,
 143                                                        0.0,
 144                                                        GTK_PARAM_READWRITE));
 145   g_object_class_install_property (gobject_class,
 146                                    PROP_LABEL_YALIGN,
 147                                    g_param_spec_float ("label-yalign",
 148                                                        P_("Label yalign"),
 149                                                        P_("The vertical alignment of the label"),
 150                                                        0.0,
 151                                                        1.0,
 152                                                        0.5,
 153                                                        GTK_PARAM_READWRITE));
 154   g_object_class_install_property (gobject_class,
 155                                    PROP_SHADOW_TYPE,
 156                                    g_param_spec_enum ("shadow-type",
 157                                                       P_("Frame shadow"),
 158                                                       P_("Appearance of the frame border"),
 159                                                       GTK_TYPE_SHADOW_TYPE,
 160                                                       GTK_SHADOW_ETCHED_IN,
 161                                                       GTK_PARAM_READWRITE));
 162
 163   g_object_class_install_property (gobject_class,
 164                                    PROP_LABEL_WIDGET,
 165                                    g_param_spec_object ("label-widget",
 166                                                         P_("Label widget"),
 167                                                         P_("A widget to display in place of the usual frame label"),
 168                                                         GTK_TYPE_WIDGET,
 169                                                         GTK_PARAM_READWRITE));
 170
 171   widget_class->draw                           = gtk_frame_draw;
 172   widget_class->size_allocate                  = gtk_frame_size_allocate;
 173   widget_class->get_preferred_width            = gtk_frame_get_preferred_width;
 174   widget_class->get_preferred_height           = gtk_frame_get_preferred_height;
 175   widget_class->get_preferred_height_for_width = gtk_frame_get_preferred_height_for_width;
 176   widget_class->get_preferred_width_for_height = gtk_frame_get_preferred_width_for_height;
 177
 178   container_class->remove = gtk_frame_remove;
 179   container_class->forall = gtk_frame_forall;
 180
 181   class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
 182
 183   g_type_class_add_private (class, sizeof (GtkFramePrivate));
 184 }
 185
 186 static void
 187 gtk_frame_buildable_init (GtkBuildableIface *iface)
 188 {
 189   iface->add_child = gtk_frame_buildable_add_child;
 190 }
 191
 192 static void
 193 gtk_frame_buildable_add_child (GtkBuildable *buildable,
 194                                GtkBuilder   *builder,
 195                                GObject      *child,
 196                                const gchar  *type)
 197 {
 198   if (type && strcmp (type, "label") == 0)
 199     gtk_frame_set_label_widget (GTK_FRAME (buildable), GTK_WIDGET (child));
 200   else if (!type)
 201     gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
 202   else
 203     GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_FRAME (buildable), type);
 204 }
 205
 206 static void
 207 gtk_frame_init (GtkFrame *frame)
 208 {
 209   GtkFramePrivate *priv;
 210
 211   frame->priv = G_TYPE_INSTANCE_GET_PRIVATE (frame,
 212                                              GTK_TYPE_FRAME,
 213                                              GtkFramePrivate);
 214   priv = frame->priv;
 215
 216   priv->label_widget = NULL;
 217   priv->shadow_type = GTK_SHADOW_ETCHED_IN;
 218   priv->label_xalign = 0.0;
 219   priv->label_yalign = 0.5;
 220 }
 221
 222 static void
 223 gtk_frame_set_property (GObject         *object,
 224                         guint            prop_id,
 225                         const GValue    *value,
 226                         GParamSpec      *pspec)
 227 {
 228   GtkFrame *frame = GTK_FRAME (object);
 229   GtkFramePrivate *priv = frame->priv;
 230
 231   switch (prop_id)
 232     {
 233     case PROP_LABEL:
 234       gtk_frame_set_label (frame, g_value_get_string (value));
 235       break;
 236     case PROP_LABEL_XALIGN:
 237       gtk_frame_set_label_align (frame, g_value_get_float (value),
 238                                  priv->label_yalign);
 239       break;
 240     case PROP_LABEL_YALIGN:
 241       gtk_frame_set_label_align (frame, priv->label_xalign,
 242                                  g_value_get_float (value));
 243       break;
 244     case PROP_SHADOW_TYPE:
 245       gtk_frame_set_shadow_type (frame, g_value_get_enum (value));
 246       break;
 247     case PROP_LABEL_WIDGET:
 248       gtk_frame_set_label_widget (frame, g_value_get_object (value));
 249       break;
 250     default:
 251       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 252       break;
 253     }
 254 }
 255
 256 static void
 257 gtk_frame_get_property (GObject         *object,
 258                         guint            prop_id,
 259                         GValue          *value,
 260                         GParamSpec      *pspec)
 261 {
 262   GtkFrame *frame = GTK_FRAME (object);
 263   GtkFramePrivate *priv = frame->priv;
 264
 265   switch (prop_id)
 266     {
 267     case PROP_LABEL:
 268       g_value_set_string (value, gtk_frame_get_label (frame));
 269       break;
 270     case PROP_LABEL_XALIGN:
 271       g_value_set_float (value, priv->label_xalign);
 272       break;
 273     case PROP_LABEL_YALIGN:
 274       g_value_set_float (value, priv->label_yalign);
 275       break;
 276     case PROP_SHADOW_TYPE:
 277       g_value_set_enum (value, priv->shadow_type);
 278       break;
 279     case PROP_LABEL_WIDGET:
 280       g_value_set_object (value,
 281                           priv->label_widget ?
 282                           G_OBJECT (priv->label_widget) : NULL);
 283       break;
 284     default:
 285       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 286       break;
 287     }
 288 }
 289
 290 /**
 291  * gtk_frame_new:
 292  * @label: the text to use as the label of the frame
 293  *
 294  * Creates a new #GtkFrame, with optional label @label.
 295  * If @label is %NULL, the label is omitted.
 296  *
 297  * Return value: a new #GtkFrame widget
 298  **/
 299 GtkWidget*
 300 gtk_frame_new (const gchar *label)
 301 {
 302   return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
 303 }
 304
 305 static void
 306 gtk_frame_remove (GtkContainer *container,
 307                   GtkWidget    *child)
 308 {
 309   GtkFrame *frame = GTK_FRAME (container);
 310   GtkFramePrivate *priv = frame->priv;
 311
 312   if (priv->label_widget == child)
 313     gtk_frame_set_label_widget (frame, NULL);
 314   else
 315     GTK_CONTAINER_CLASS (gtk_frame_parent_class)->remove (container, child);
 316 }
 317
 318 static void
 319 gtk_frame_forall (GtkContainer *container,
 320                   gboolean      include_internals,
 321                   GtkCallback   callback,
 322                   gpointer      callback_data)
 323 {
 324   GtkBin *bin = GTK_BIN (container);
 325   GtkFrame *frame = GTK_FRAME (container);
 326   GtkFramePrivate *priv = frame->priv;
 327   GtkWidget *child;
 328
 329   child = gtk_bin_get_child (bin);
 330   if (child)
 331     (* callback) (child, callback_data);
 332
 333   if (priv->label_widget)
 334     (* callback) (priv->label_widget, callback_data);
 335 }
 336
 337 /**
 338  * gtk_frame_set_label:
 339  * @frame: a #GtkFrame
 340  * @label: (allow-none): the text to use as the label of the frame
 341  *
 342  * Sets the text of the label. If @label is %NULL,
 343  * the current label is removed.
 344  **/
 345 void
 346 gtk_frame_set_label (GtkFrame *frame,
 347                      const gchar *label)
 348 {
 349   g_return_if_fail (GTK_IS_FRAME (frame));
 350
 351   if (!label)
 352     {
 353       gtk_frame_set_label_widget (frame, NULL);
 354     }
 355   else
 356     {
 357       GtkWidget *child = gtk_label_new (label);
 358       gtk_widget_show (child);
 359
 360       gtk_frame_set_label_widget (frame, child);
 361     }
 362 }
 363
 364 /**
 365  * gtk_frame_get_label:
 366  * @frame: a #GtkFrame
 367  *
 368  * If the frame's label widget is a #GtkLabel, returns the
 369  * text in the label widget. (The frame will have a #GtkLabel
 370  * for the label widget if a non-%NULL argument was passed
 371  * to gtk_frame_new().)
 372  *
 373  * Return value: the text in the label, or %NULL if there
 374  *               was no label widget or the lable widget was not
 375  *               a #GtkLabel. This string is owned by GTK+ and
 376  *               must not be modified or freed.
 377  **/
 378 G_CONST_RETURN gchar *
 379 gtk_frame_get_label (GtkFrame *frame)
 380 {
 381   GtkFramePrivate *priv;
 382
 383   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 384
 385   priv = frame->priv;
 386
 387   if (GTK_IS_LABEL (priv->label_widget))
 388     return gtk_label_get_text (GTK_LABEL (priv->label_widget));
 389   else
 390     return NULL;
 391 }
 392
 393 /**
 394  * gtk_frame_set_label_widget:
 395  * @frame: a #GtkFrame
 396  * @label_widget: the new label widget
 397  *
 398  * Sets the label widget for the frame. This is the widget that
 399  * will appear embedded in the top edge of the frame as a
 400  * title.
 401  **/
 402 void
 403 gtk_frame_set_label_widget (GtkFrame  *frame,
 404                             GtkWidget *label_widget)
 405 {
 406   GtkFramePrivate *priv;
 407   gboolean need_resize = FALSE;
 408
 409   g_return_if_fail (GTK_IS_FRAME (frame));
 410   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
 411   g_return_if_fail (label_widget == NULL || gtk_widget_get_parent (label_widget) == NULL);
 412
 413   priv = frame->priv;
 414
 415   if (priv->label_widget == label_widget)
 416     return;
 417
 418   if (priv->label_widget)
 419     {
 420       need_resize = gtk_widget_get_visible (priv->label_widget);
 421       gtk_widget_unparent (priv->label_widget);
 422     }
 423
 424   priv->label_widget = label_widget;
 425
 426   if (label_widget)
 427     {
 428       priv->label_widget = label_widget;
 429       gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
 430       need_resize |= gtk_widget_get_visible (label_widget);
 431     }
 432
 433   if (gtk_widget_get_visible (GTK_WIDGET (frame)) && need_resize)
 434     gtk_widget_queue_resize (GTK_WIDGET (frame));
 435
 436   g_object_freeze_notify (G_OBJECT (frame));
 437   g_object_notify (G_OBJECT (frame), "label-widget");
 438   g_object_notify (G_OBJECT (frame), "label");
 439   g_object_thaw_notify (G_OBJECT (frame));
 440 }
 441
 442 /**
 443  * gtk_frame_get_label_widget:
 444  * @frame: a #GtkFrame
 445  *
 446  * Retrieves the label widget for the frame. See
 447  * gtk_frame_set_label_widget().
 448  *
 449  * Return value: (transfer none): the label widget, or %NULL if there is none.
 450  **/
 451 GtkWidget *
 452 gtk_frame_get_label_widget (GtkFrame *frame)
 453 {
 454   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 455
 456   return frame->priv->label_widget;
 457 }
 458
 459 /**
 460  * gtk_frame_set_label_align:
 461  * @frame: a #GtkFrame
 462  * @xalign: The position of the label along the top edge
 463  *   of the widget. A value of 0.0 represents left alignment;
 464  *   1.0 represents right alignment.
 465  * @yalign: The y alignment of the label. A value of 0.0 aligns under
 466  *   the frame; 1.0 aligns above the frame. If the values are exactly
 467  *   0.0 or 1.0 the gap in the frame won't be painted because the label
 468  *   will be completely above or below the frame.
 469  *
 470  * Sets the alignment of the frame widget's label. The
 471  * default values for a newly created frame are 0.0 and 0.5.
 472  **/
 473 void
 474 gtk_frame_set_label_align (GtkFrame *frame,
 475                            gfloat    xalign,
 476                            gfloat    yalign)
 477 {
 478   GtkFramePrivate *priv;
 479
 480   g_return_if_fail (GTK_IS_FRAME (frame));
 481
 482   priv = frame->priv;
 483
 484   xalign = CLAMP (xalign, 0.0, 1.0);
 485   yalign = CLAMP (yalign, 0.0, 1.0);
 486
 487   g_object_freeze_notify (G_OBJECT (frame));
 488   if (xalign != priv->label_xalign)
 489     {
 490       priv->label_xalign = xalign;
 491       g_object_notify (G_OBJECT (frame), "label-xalign");
 492     }
 493
 494   if (yalign != priv->label_yalign)
 495     {
 496       priv->label_yalign = yalign;
 497       g_object_notify (G_OBJECT (frame), "label-yalign");
 498     }
 499
 500   g_object_thaw_notify (G_OBJECT (frame));
 501   gtk_widget_queue_resize (GTK_WIDGET (frame));
 502 }
 503
 504 /**
 505  * gtk_frame_get_label_align:
 506  * @frame: a #GtkFrame
 507  * @xalign: (allow-none): location to store X alignment of frame's label, or %NULL
 508  * @yalign: (allow-none): location to store X alignment of frame's label, or %NULL
 509  *
 510  * Retrieves the X and Y alignment of the frame's label. See
 511  * gtk_frame_set_label_align().
 512  **/
 513 void
 514 gtk_frame_get_label_align (GtkFrame *frame,
 515                            gfloat   *xalign,
 516                            gfloat   *yalign)
 517 {
 518   GtkFramePrivate *priv;
 519
 520   g_return_if_fail (GTK_IS_FRAME (frame));
 521
 522   priv = frame->priv;
 523
 524   if (xalign)
 525     *xalign = priv->label_xalign;
 526   if (yalign)
 527     *yalign = priv->label_yalign;
 528 }
 529
 530 /**
 531  * gtk_frame_set_shadow_type:
 532  * @frame: a #GtkFrame
 533  * @type: the new #GtkShadowType
 534  *
 535  * Sets the shadow type for @frame.
 536  **/
 537 void
 538 gtk_frame_set_shadow_type (GtkFrame      *frame,
 539                            GtkShadowType  type)
 540 {
 541   GtkFramePrivate *priv;
 542   GtkWidget *widget;
 543
 544   g_return_if_fail (GTK_IS_FRAME (frame));
 545
 546   priv = frame->priv;
 547
 548   if ((GtkShadowType) priv->shadow_type != type)
 549     {
 550       widget = GTK_WIDGET (frame);
 551       priv->shadow_type = type;
 552       g_object_notify (G_OBJECT (frame), "shadow-type");
 553
 554       if (gtk_widget_is_drawable (widget))
 555         {
 556           gtk_widget_queue_draw (widget);
 557         }
 558
 559       gtk_widget_queue_resize (widget);
 560     }
 561 }
 562
 563 /**
 564  * gtk_frame_get_shadow_type:
 565  * @frame: a #GtkFrame
 566  *
 567  * Retrieves the shadow type of the frame. See
 568  * gtk_frame_set_shadow_type().
 569  *
 570  * Return value: the current shadow type of the frame.
 571  **/
 572 GtkShadowType
 573 gtk_frame_get_shadow_type (GtkFrame *frame)
 574 {
 575   g_return_val_if_fail (GTK_IS_FRAME (frame), GTK_SHADOW_ETCHED_IN);
 576
 577   return frame->priv->shadow_type;
 578 }
 579
 580 static gboolean
 581 gtk_frame_draw (GtkWidget *widget,
 582                 cairo_t   *cr)
 583 {
 584   GtkFrame *frame;
 585   GtkFramePrivate *priv;
 586   GtkStyleContext *context;
 587   GtkStateFlags state;
 588   gint x, y, width, height;
 589   GtkAllocation allocation;
 590   GtkBorder padding;
 591
 592   frame = GTK_FRAME (widget);
 593   priv = frame->priv;
 594
 595   context = gtk_widget_get_style_context (widget);
 596   state = gtk_widget_get_state_flags (widget);
 597   gtk_widget_get_allocation (widget, &allocation);
 598
 599   gtk_style_context_save (context);
 600   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 601
 602   gtk_style_context_get_padding (context, state, &padding);
 603
 604   x = priv->child_allocation.x - allocation.x - padding.left;
 605   y = priv->child_allocation.y - allocation.y - padding.top;
 606   width = priv->child_allocation.width + padding.left + padding.right;
 607   height =  priv->child_allocation.height + padding.top + padding.bottom;
 608
 609   if (priv->shadow_type != GTK_SHADOW_NONE)
 610     {
 611       if (priv->label_widget)
 612         {
 613           gfloat xalign;
 614           gint height_extra;
 615           gint x2;
 616
 617           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 618             xalign = priv->label_xalign;
 619           else
 620             xalign = 1 - priv->label_xalign;
 621
 622           height_extra = MAX (0, priv->label_allocation.height - padding.top)
 623             - priv->label_yalign * priv->label_allocation.height;
 624           y -= height_extra;
 625           height += height_extra;
 626
 627           x2 = padding.left + (priv->child_allocation.width - priv->label_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_SIDE_PAD;
 628           /* If the label is completely over or under the frame we can omit the gap */
 629           if (priv->label_yalign == 0.0 || priv->label_yalign == 1.0)
 630             gtk_render_frame (context, cr, x, y, width, height);
 631           else
 632             gtk_render_frame_gap (context, cr,
 633                                   x, y, width, height,
 634                                   GTK_POS_TOP, x2,
 635                                   x2 + priv->label_allocation.width + 2 * LABEL_PAD);
 636         }
 637       else
 638         gtk_render_frame (context, cr, x, y, width, height);
 639     }
 640
 641   gtk_style_context_restore (context);
 642
 643   GTK_WIDGET_CLASS (gtk_frame_parent_class)->draw (widget, cr);
 644
 645   return FALSE;
 646 }
 647
 648 static void
 649 gtk_frame_size_allocate (GtkWidget     *widget,
 650                          GtkAllocation *allocation)
 651 {
 652   GtkFrame *frame = GTK_FRAME (widget);
 653   GtkFramePrivate *priv = frame->priv;
 654   GtkBin *bin = GTK_BIN (widget);
 655   GtkAllocation new_allocation;
 656   GtkWidget *child;
 657
 658   gtk_widget_set_allocation (widget, allocation);
 659
 660   gtk_frame_compute_child_allocation (frame, &new_allocation);
 661
 662   /* If the child allocation changed, that means that the frame is drawn
 663    * in a new place, so we must redraw the entire widget.
 664    */
 665   if (gtk_widget_get_mapped (widget))
 666     {
 667       gdk_window_invalidate_rect (gtk_widget_get_window (widget), allocation, FALSE);
 668     }
 669
 670   child = gtk_bin_get_child (bin);
 671   if (child && gtk_widget_get_visible (child))
 672     gtk_widget_size_allocate (child, &new_allocation);
 673
 674   priv->child_allocation = new_allocation;
 675
 676   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 677     {
 678       GtkStyleContext *context;
 679       GtkStateFlags state;
 680       GtkBorder padding;
 681       gint nat_width, width, height;
 682       gfloat xalign;
 683
 684       context = gtk_widget_get_style_context (widget);
 685       state = gtk_widget_get_state_flags (widget);
 686
 687       gtk_style_context_save (context);
 688       gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 689
 690       gtk_style_context_get_padding (context, state, &padding);
 691
 692       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 693         xalign = priv->label_xalign;
 694       else
 695         xalign = 1 - priv->label_xalign;
 696
 697       gtk_widget_get_preferred_width (priv->label_widget, NULL, &nat_width);
 698       width = new_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD;
 699       width = MIN (width, nat_width);
 700
 701       gtk_widget_get_preferred_height_for_width (priv->label_widget, width,
 702                                                  &height, NULL);
 703
 704
 705       priv->label_allocation.x = priv->child_allocation.x + LABEL_SIDE_PAD +
 706         (new_allocation.width - width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_PAD;
 707
 708       priv->label_allocation.width = width;
 709
 710       priv->label_allocation.y = priv->child_allocation.y - MAX (height, padding.top);
 711       priv->label_allocation.height = height;
 712
 713       gtk_widget_size_allocate (priv->label_widget, &priv->label_allocation);
 714
 715       gtk_style_context_restore (context);
 716     }
 717 }
 718
 719 static void
 720 gtk_frame_compute_child_allocation (GtkFrame      *frame,
 721                                     GtkAllocation *child_allocation)
 722 {
 723   g_return_if_fail (GTK_IS_FRAME (frame));
 724   g_return_if_fail (child_allocation != NULL);
 725
 726   GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
 727 }
 728
 729 static void
 730 gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
 731                                          GtkAllocation *child_allocation)
 732 {
 733   GtkFramePrivate *priv = frame->priv;
 734   GtkWidget *widget = GTK_WIDGET (frame);
 735   GtkAllocation allocation;
 736   GtkStyleContext *context;
 737   GtkStateFlags state;
 738   GtkBorder padding;
 739   gint top_margin;
 740   guint border_width;
 741
 742   context = gtk_widget_get_style_context (widget);
 743   state = gtk_widget_get_state_flags (widget);
 744
 745   gtk_style_context_save (context);
 746   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 747
 748   gtk_style_context_get_padding (context, state, &padding);
 749   gtk_widget_get_allocation (widget, &allocation);
 750
 751   border_width = gtk_container_get_border_width (GTK_CONTAINER (frame));
 752
 753   if (priv->label_widget)
 754     {
 755       gint nat_width, width, height;
 756
 757       gtk_widget_get_preferred_width (priv->label_widget, NULL, &nat_width);
 758
 759       width = allocation.width;
 760       width -= 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 761       width -= (border_width * 2) + padding.left + padding.right;
 762
 763       width = MIN (width, nat_width);
 764
 765       gtk_widget_get_preferred_height_for_width (priv->label_widget, width,
 766                                                  &height, NULL);
 767
 768       top_margin = MAX (height, padding.top);
 769     }
 770   else
 771     top_margin = padding.top;
 772
 773   child_allocation->x = border_width + padding.left;
 774   child_allocation->y = border_width + top_margin;
 775   child_allocation->width = MAX (1, (gint) allocation.width - (border_width * 2) -
 776                                  padding.left - padding.right);
 777   child_allocation->height = MAX (1, ((gint) allocation.height - child_allocation->y -
 778                                       border_width - padding.bottom));
 779
 780   child_allocation->x += allocation.x;
 781   child_allocation->y += allocation.y;
 782
 783   gtk_style_context_restore (context);
 784 }
 785
 786 static void
 787 gtk_frame_get_preferred_size (GtkWidget      *request,
 788                               GtkOrientation  orientation,
 789                               gint           *minimum_size,
 790                               gint           *natural_size)
 791 {
 792   GtkFrame *frame = GTK_FRAME (request);
 793   GtkFramePrivate *priv = frame->priv;
 794   GtkStyleContext *context;
 795   GtkStateFlags state;
 796   GtkBorder padding;
 797   GtkWidget *widget = GTK_WIDGET (request);
 798   GtkWidget *child;
 799   GtkBin *bin = GTK_BIN (widget);
 800   gint child_min, child_nat;
 801   gint minimum, natural;
 802   guint border_width;
 803
 804   context = gtk_widget_get_style_context (widget);
 805   state = gtk_widget_get_state_flags (widget);
 806
 807   gtk_style_context_save (context);
 808   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 809   gtk_style_context_get_padding (context, state, &padding);
 810
 811   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 812     {
 813       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 814         {
 815           gtk_widget_get_preferred_width (priv->label_widget,
 816                                           &child_min, &child_nat);
 817           minimum = child_min + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 818           natural = child_nat + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 819         }
 820       else
 821         {
 822           gtk_widget_get_preferred_height (priv->label_widget,
 823                                            &child_min, &child_nat);
 824           minimum = MAX (0, child_min - padding.top);
 825           natural = MAX (0, child_nat - padding.top);
 826         }
 827     }
 828   else
 829     {
 830       minimum = 0;
 831       natural = 0;
 832     }
 833
 834   child = gtk_bin_get_child (bin);
 835   if (child && gtk_widget_get_visible (child))
 836     {
 837       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 838         {
 839           gtk_widget_get_preferred_width (child,
 840                                           &child_min, &child_nat);
 841           minimum = MAX (minimum, child_min);
 842           natural = MAX (natural, child_nat);
 843         }
 844       else
 845         {
 846           gtk_widget_get_preferred_height (child,
 847                                            &child_min, &child_nat);
 848           minimum += child_min;
 849           natural += child_nat;
 850         }
 851     }
 852
 853   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 854
 855   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 856     {
 857       minimum += (border_width * 2) + padding.left + padding.right;
 858       natural += (border_width * 2) + padding.left + padding.right;
 859     }
 860   else
 861     {
 862       minimum += (border_width * 2) + padding.top + padding.bottom;
 863       natural += (border_width * 2) + padding.top + padding.bottom;
 864     }
 865
 866  if (minimum_size)
 867     *minimum_size = minimum;
 868
 869   if (natural_size)
 870     *natural_size = natural;
 871
 872   gtk_style_context_restore (context);
 873 }
 874
 875 static void
 876 gtk_frame_get_preferred_width (GtkWidget *widget,
 877                                gint      *minimum_size,
 878                                gint      *natural_size)
 879 {
 880   gtk_frame_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
 881 }
 882
 883 static void
 884 gtk_frame_get_preferred_height (GtkWidget *widget,
 885                                 gint      *minimum_size,
 886                                 gint      *natural_size)
 887 {
 888   gtk_frame_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
 889 }
 890
 891
 892 static void
 893 gtk_frame_get_preferred_height_for_width (GtkWidget *request,
 894                                           gint       width,
 895                                           gint      *minimum_height,
 896                                           gint      *natural_height)
 897 {
 898   GtkWidget *widget = GTK_WIDGET (request);
 899   GtkWidget *child;
 900   GtkFrame *frame = GTK_FRAME (widget);
 901   GtkFramePrivate *priv = frame->priv;
 902   GtkBin *bin = GTK_BIN (widget);
 903   GtkStyleContext *context;
 904   GtkStateFlags state;
 905   GtkBorder padding;
 906   gint child_min, child_nat, label_width;
 907   gint minimum, natural;
 908   guint border_width;
 909
 910   context = gtk_widget_get_style_context (widget);
 911   state = gtk_widget_get_state_flags (widget);
 912
 913   gtk_style_context_save (context);
 914   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 915   gtk_style_context_get_padding (context, state, &padding);
 916
 917   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 918   minimum      = (border_width * 2) + padding.top + padding.bottom;
 919   natural      = (border_width * 2) + padding.top + padding.bottom;
 920
 921   width -= (border_width * 2) + padding.left + padding.right;
 922   label_width = width - 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 923
 924   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 925     {
 926       gtk_widget_get_preferred_height_for_width (priv->label_widget,
 927                                                  label_width, &child_min, &child_nat);
 928       minimum += child_min;
 929       natural += child_nat;
 930     }
 931
 932   child = gtk_bin_get_child (bin);
 933   if (child && gtk_widget_get_visible (child))
 934     {
 935       gtk_widget_get_preferred_height_for_width (child,
 936                                                  width, &child_min, &child_nat);
 937       minimum += child_min;
 938       natural += child_nat;
 939     }
 940
 941  if (minimum_height)
 942     *minimum_height = minimum;
 943
 944   if (natural_height)
 945     *natural_height = natural;
 946
 947   gtk_style_context_restore (context);
 948 }
 949
 950 static void
 951 gtk_frame_get_preferred_width_for_height (GtkWidget *widget,
 952                                           gint       height,
 953                                           gint      *minimum_width,
 954                                           gint      *natural_width)
 955 {
 956   GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
 957 }
 958