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