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 #include "a11y/gtkframeaccessible.h"
  37
  38 /**
  39  * SECTION:gtkframe
  40  * @Short_description: A bin with a decorative frame and optional label
  41  * @Title: GtkFrame
  42  *
  43  * The frame widget is a Bin that surrounds its child
  44  * with a decorative frame and an optional label.
  45  * If present, the label is drawn in a gap in the
  46  * top side of the frame. The position of the
  47  * label can be controlled with gtk_frame_set_label_align().
  48  *
  49  * <refsect2 id="GtkFrame-BUILDER-UI">
  50  * <title>GtkFrame as GtkBuildable</title>
  51  * <para>
  52  * The GtkFrame implementation of the GtkBuildable interface
  53  * supports placing a child in the label position by specifying
  54  * "label" as the "type" attribute of a &lt;child&gt; element.
  55  * A normal content child can be specified without specifying
  56  * a &lt;child&gt; type attribute.
  57  * </para>
  58  * <example>
  59  * <title>A UI definition fragment with GtkFrame</title>
  60  * <programlisting><![CDATA[
  61  * <object class="GtkFrame">
  62  *   <child type="label">
  63  *     <object class="GtkLabel" id="frame-label"/>
  64  *   </child>
  65  *   <child>
  66  *     <object class="GtkEntry" id="frame-content"/>
  67  *   </child>
  68  * </object>
  69  * ]]></programlisting>
  70  * </example>
  71  * </refsect2>
  72  */
  73
  74
  75 #define LABEL_PAD 1
  76 #define LABEL_SIDE_PAD 2
  77
  78 struct _GtkFramePrivate
  79 {
  80   /* Properties */
  81   GtkWidget *label_widget;
  82
  83   gint16 shadow_type;
  84   gfloat label_xalign;
  85   gfloat label_yalign;
  86   /* Properties */
  87
  88   GtkAllocation child_allocation;
  89   GtkAllocation label_allocation;
  90 };
  91
  92 enum {
  93   PROP_0,
  94   PROP_LABEL,
  95   PROP_LABEL_XALIGN,
  96   PROP_LABEL_YALIGN,
  97   PROP_SHADOW_TYPE,
  98   PROP_LABEL_WIDGET
  99 };
 100
 101 static void gtk_frame_set_property (GObject      *object,
 102                                     guint         param_id,
 103                                     const GValue *value,
 104                                     GParamSpec   *pspec);
 105 static void gtk_frame_get_property (GObject     *object,
 106                                     guint        param_id,
 107                                     GValue      *value,
 108                                     GParamSpec  *pspec);
 109 static gboolean gtk_frame_draw      (GtkWidget      *widget,
 110                                      cairo_t        *cr);
 111 static void gtk_frame_size_allocate (GtkWidget      *widget,
 112                                      GtkAllocation  *allocation);
 113 static void gtk_frame_remove        (GtkContainer   *container,
 114                                      GtkWidget      *child);
 115 static void gtk_frame_forall        (GtkContainer   *container,
 116                                      gboolean        include_internals,
 117                                      GtkCallback     callback,
 118                                      gpointer        callback_data);
 119 static GtkWidgetPath * gtk_frame_get_path_for_child (GtkContainer *container,
 120                                                      GtkWidget    *child);
 121
 122 static void gtk_frame_compute_child_allocation      (GtkFrame      *frame,
 123                                                      GtkAllocation *child_allocation);
 124 static void gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
 125                                                      GtkAllocation *child_allocation);
 126
 127 /* GtkBuildable */
 128 static void gtk_frame_buildable_init                (GtkBuildableIface *iface);
 129 static void gtk_frame_buildable_add_child           (GtkBuildable *buildable,
 130                                                      GtkBuilder   *builder,
 131                                                      GObject      *child,
 132                                                      const gchar  *type);
 133
 134 static void gtk_frame_get_preferred_width           (GtkWidget           *widget,
 135                                                      gint                *minimum_size,
 136                                                      gint                *natural_size);
 137 static void gtk_frame_get_preferred_height          (GtkWidget           *widget,
 138                                                      gint                *minimum_size,
 139                                                      gint                *natural_size);
 140 static void gtk_frame_get_preferred_height_for_width(GtkWidget           *layout,
 141                                                      gint                 width,
 142                                                      gint                *minimum_height,
 143                                                      gint                *natural_height);
 144 static void gtk_frame_get_preferred_width_for_height(GtkWidget           *layout,
 145                                                      gint                 width,
 146                                                      gint                *minimum_height,
 147                                                      gint                *natural_height);
 148
 149
 150 G_DEFINE_TYPE_WITH_CODE (GtkFrame, gtk_frame, GTK_TYPE_BIN,
 151                          G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
 152                                                 gtk_frame_buildable_init))
 153
 154 static void
 155 gtk_frame_class_init (GtkFrameClass *class)
 156 {
 157   GObjectClass *gobject_class;
 158   GtkWidgetClass *widget_class;
 159   GtkContainerClass *container_class;
 160
 161   gobject_class = (GObjectClass*) class;
 162   widget_class = GTK_WIDGET_CLASS (class);
 163   container_class = GTK_CONTAINER_CLASS (class);
 164
 165   gobject_class->set_property = gtk_frame_set_property;
 166   gobject_class->get_property = gtk_frame_get_property;
 167
 168   g_object_class_install_property (gobject_class,
 169                                    PROP_LABEL,
 170                                    g_param_spec_string ("label",
 171                                                         P_("Label"),
 172                                                         P_("Text of the frame's label"),
 173                                                         NULL,
 174                                                         GTK_PARAM_READABLE |
 175                                                         GTK_PARAM_WRITABLE));
 176   g_object_class_install_property (gobject_class,
 177                                    PROP_LABEL_XALIGN,
 178                                    g_param_spec_float ("label-xalign",
 179                                                        P_("Label xalign"),
 180                                                        P_("The horizontal alignment of the label"),
 181                                                        0.0,
 182                                                        1.0,
 183                                                        0.0,
 184                                                        GTK_PARAM_READWRITE));
 185   g_object_class_install_property (gobject_class,
 186                                    PROP_LABEL_YALIGN,
 187                                    g_param_spec_float ("label-yalign",
 188                                                        P_("Label yalign"),
 189                                                        P_("The vertical alignment of the label"),
 190                                                        0.0,
 191                                                        1.0,
 192                                                        0.5,
 193                                                        GTK_PARAM_READWRITE));
 194   g_object_class_install_property (gobject_class,
 195                                    PROP_SHADOW_TYPE,
 196                                    g_param_spec_enum ("shadow-type",
 197                                                       P_("Frame shadow"),
 198                                                       P_("Appearance of the frame border"),
 199                                                       GTK_TYPE_SHADOW_TYPE,
 200                                                       GTK_SHADOW_ETCHED_IN,
 201                                                       GTK_PARAM_READWRITE));
 202
 203   g_object_class_install_property (gobject_class,
 204                                    PROP_LABEL_WIDGET,
 205                                    g_param_spec_object ("label-widget",
 206                                                         P_("Label widget"),
 207                                                         P_("A widget to display in place of the usual frame label"),
 208                                                         GTK_TYPE_WIDGET,
 209                                                         GTK_PARAM_READWRITE));
 210
 211   widget_class->draw                           = gtk_frame_draw;
 212   widget_class->size_allocate                  = gtk_frame_size_allocate;
 213   widget_class->get_preferred_width            = gtk_frame_get_preferred_width;
 214   widget_class->get_preferred_height           = gtk_frame_get_preferred_height;
 215   widget_class->get_preferred_height_for_width = gtk_frame_get_preferred_height_for_width;
 216   widget_class->get_preferred_width_for_height = gtk_frame_get_preferred_width_for_height;
 217
 218   container_class->remove = gtk_frame_remove;
 219   container_class->forall = gtk_frame_forall;
 220   container_class->get_path_for_child = gtk_frame_get_path_for_child;
 221
 222   class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
 223
 224   g_type_class_add_private (class, sizeof (GtkFramePrivate));
 225
 226   gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_FRAME_ACCESSIBLE);
 227 }
 228
 229 static void
 230 gtk_frame_buildable_init (GtkBuildableIface *iface)
 231 {
 232   iface->add_child = gtk_frame_buildable_add_child;
 233 }
 234
 235 static void
 236 gtk_frame_buildable_add_child (GtkBuildable *buildable,
 237                                GtkBuilder   *builder,
 238                                GObject      *child,
 239                                const gchar  *type)
 240 {
 241   if (type && strcmp (type, "label") == 0)
 242     gtk_frame_set_label_widget (GTK_FRAME (buildable), GTK_WIDGET (child));
 243   else if (!type)
 244     gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
 245   else
 246     GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_FRAME (buildable), type);
 247 }
 248
 249 static void
 250 gtk_frame_init (GtkFrame *frame)
 251 {
 252   GtkFramePrivate *priv;
 253
 254   frame->priv = G_TYPE_INSTANCE_GET_PRIVATE (frame,
 255                                              GTK_TYPE_FRAME,
 256                                              GtkFramePrivate);
 257   priv = frame->priv;
 258
 259   priv->label_widget = NULL;
 260   priv->shadow_type = GTK_SHADOW_ETCHED_IN;
 261   priv->label_xalign = 0.0;
 262   priv->label_yalign = 0.5;
 263 }
 264
 265 static void
 266 gtk_frame_set_property (GObject         *object,
 267                         guint            prop_id,
 268                         const GValue    *value,
 269                         GParamSpec      *pspec)
 270 {
 271   GtkFrame *frame = GTK_FRAME (object);
 272   GtkFramePrivate *priv = frame->priv;
 273
 274   switch (prop_id)
 275     {
 276     case PROP_LABEL:
 277       gtk_frame_set_label (frame, g_value_get_string (value));
 278       break;
 279     case PROP_LABEL_XALIGN:
 280       gtk_frame_set_label_align (frame, g_value_get_float (value),
 281                                  priv->label_yalign);
 282       break;
 283     case PROP_LABEL_YALIGN:
 284       gtk_frame_set_label_align (frame, priv->label_xalign,
 285                                  g_value_get_float (value));
 286       break;
 287     case PROP_SHADOW_TYPE:
 288       gtk_frame_set_shadow_type (frame, g_value_get_enum (value));
 289       break;
 290     case PROP_LABEL_WIDGET:
 291       gtk_frame_set_label_widget (frame, g_value_get_object (value));
 292       break;
 293     default:
 294       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 295       break;
 296     }
 297 }
 298
 299 static void
 300 gtk_frame_get_property (GObject         *object,
 301                         guint            prop_id,
 302                         GValue          *value,
 303                         GParamSpec      *pspec)
 304 {
 305   GtkFrame *frame = GTK_FRAME (object);
 306   GtkFramePrivate *priv = frame->priv;
 307
 308   switch (prop_id)
 309     {
 310     case PROP_LABEL:
 311       g_value_set_string (value, gtk_frame_get_label (frame));
 312       break;
 313     case PROP_LABEL_XALIGN:
 314       g_value_set_float (value, priv->label_xalign);
 315       break;
 316     case PROP_LABEL_YALIGN:
 317       g_value_set_float (value, priv->label_yalign);
 318       break;
 319     case PROP_SHADOW_TYPE:
 320       g_value_set_enum (value, priv->shadow_type);
 321       break;
 322     case PROP_LABEL_WIDGET:
 323       g_value_set_object (value,
 324                           priv->label_widget ?
 325                           G_OBJECT (priv->label_widget) : NULL);
 326       break;
 327     default:
 328       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 329       break;
 330     }
 331 }
 332
 333 /**
 334  * gtk_frame_new:
 335  * @label: the text to use as the label of the frame
 336  *
 337  * Creates a new #GtkFrame, with optional label @label.
 338  * If @label is %NULL, the label is omitted.
 339  *
 340  * Return value: a new #GtkFrame widget
 341  **/
 342 GtkWidget*
 343 gtk_frame_new (const gchar *label)
 344 {
 345   return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
 346 }
 347
 348 static void
 349 gtk_frame_remove (GtkContainer *container,
 350                   GtkWidget    *child)
 351 {
 352   GtkFrame *frame = GTK_FRAME (container);
 353   GtkFramePrivate *priv = frame->priv;
 354
 355   if (priv->label_widget == child)
 356     gtk_frame_set_label_widget (frame, NULL);
 357   else
 358     GTK_CONTAINER_CLASS (gtk_frame_parent_class)->remove (container, child);
 359 }
 360
 361 static void
 362 gtk_frame_forall (GtkContainer *container,
 363                   gboolean      include_internals,
 364                   GtkCallback   callback,
 365                   gpointer      callback_data)
 366 {
 367   GtkBin *bin = GTK_BIN (container);
 368   GtkFrame *frame = GTK_FRAME (container);
 369   GtkFramePrivate *priv = frame->priv;
 370   GtkWidget *child;
 371
 372   child = gtk_bin_get_child (bin);
 373   if (child)
 374     (* callback) (child, callback_data);
 375
 376   if (priv->label_widget)
 377     (* callback) (priv->label_widget, callback_data);
 378 }
 379
 380 static GtkWidgetPath *
 381 gtk_frame_get_path_for_child (GtkContainer *container,
 382                               GtkWidget    *child)
 383 {
 384   GtkFramePrivate *priv = GTK_FRAME (container)->priv;
 385   GtkWidgetPath *path;
 386
 387   path = GTK_CONTAINER_CLASS (gtk_frame_parent_class)->get_path_for_child (container, child);
 388
 389   if (child == priv->label_widget)
 390     gtk_widget_path_iter_add_class (path,
 391                                     gtk_widget_path_length (path) - 2,
 392                                     GTK_STYLE_CLASS_FRAME);
 393
 394   return path;
 395 }
 396
 397 /**
 398  * gtk_frame_set_label:
 399  * @frame: a #GtkFrame
 400  * @label: (allow-none): the text to use as the label of the frame
 401  *
 402  * Sets the text of the label. If @label is %NULL,
 403  * the current label is removed.
 404  **/
 405 void
 406 gtk_frame_set_label (GtkFrame *frame,
 407                      const gchar *label)
 408 {
 409   g_return_if_fail (GTK_IS_FRAME (frame));
 410
 411   if (!label)
 412     {
 413       gtk_frame_set_label_widget (frame, NULL);
 414     }
 415   else
 416     {
 417       GtkWidget *child = gtk_label_new (label);
 418       gtk_widget_show (child);
 419
 420       gtk_frame_set_label_widget (frame, child);
 421     }
 422 }
 423
 424 /**
 425  * gtk_frame_get_label:
 426  * @frame: a #GtkFrame
 427  *
 428  * If the frame's label widget is a #GtkLabel, returns the
 429  * text in the label widget. (The frame will have a #GtkLabel
 430  * for the label widget if a non-%NULL argument was passed
 431  * to gtk_frame_new().)
 432  *
 433  * Return value: the text in the label, or %NULL if there
 434  *               was no label widget or the lable widget was not
 435  *               a #GtkLabel. This string is owned by GTK+ and
 436  *               must not be modified or freed.
 437  **/
 438 const gchar *
 439 gtk_frame_get_label (GtkFrame *frame)
 440 {
 441   GtkFramePrivate *priv;
 442
 443   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 444
 445   priv = frame->priv;
 446
 447   if (GTK_IS_LABEL (priv->label_widget))
 448     return gtk_label_get_text (GTK_LABEL (priv->label_widget));
 449   else
 450     return NULL;
 451 }
 452
 453 /**
 454  * gtk_frame_set_label_widget:
 455  * @frame: a #GtkFrame
 456  * @label_widget: the new label widget
 457  *
 458  * Sets the label widget for the frame. This is the widget that
 459  * will appear embedded in the top edge of the frame as a
 460  * title.
 461  **/
 462 void
 463 gtk_frame_set_label_widget (GtkFrame  *frame,
 464                             GtkWidget *label_widget)
 465 {
 466   GtkFramePrivate *priv;
 467   gboolean need_resize = FALSE;
 468
 469   g_return_if_fail (GTK_IS_FRAME (frame));
 470   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
 471   g_return_if_fail (label_widget == NULL || gtk_widget_get_parent (label_widget) == NULL);
 472
 473   priv = frame->priv;
 474
 475   if (priv->label_widget == label_widget)
 476     return;
 477
 478   if (priv->label_widget)
 479     {
 480       need_resize = gtk_widget_get_visible (priv->label_widget);
 481       gtk_widget_unparent (priv->label_widget);
 482     }
 483
 484   priv->label_widget = label_widget;
 485
 486   if (label_widget)
 487     {
 488       priv->label_widget = label_widget;
 489       gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
 490       need_resize |= gtk_widget_get_visible (label_widget);
 491     }
 492
 493   if (gtk_widget_get_visible (GTK_WIDGET (frame)) && need_resize)
 494     gtk_widget_queue_resize (GTK_WIDGET (frame));
 495
 496   g_object_freeze_notify (G_OBJECT (frame));
 497   g_object_notify (G_OBJECT (frame), "label-widget");
 498   g_object_notify (G_OBJECT (frame), "label");
 499   g_object_thaw_notify (G_OBJECT (frame));
 500 }
 501
 502 /**
 503  * gtk_frame_get_label_widget:
 504  * @frame: a #GtkFrame
 505  *
 506  * Retrieves the label widget for the frame. See
 507  * gtk_frame_set_label_widget().
 508  *
 509  * Return value: (transfer none): the label widget, or %NULL if there is none.
 510  **/
 511 GtkWidget *
 512 gtk_frame_get_label_widget (GtkFrame *frame)
 513 {
 514   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 515
 516   return frame->priv->label_widget;
 517 }
 518
 519 /**
 520  * gtk_frame_set_label_align:
 521  * @frame: a #GtkFrame
 522  * @xalign: The position of the label along the top edge
 523  *   of the widget. A value of 0.0 represents left alignment;
 524  *   1.0 represents right alignment.
 525  * @yalign: The y alignment of the label. A value of 0.0 aligns under
 526  *   the frame; 1.0 aligns above the frame. If the values are exactly
 527  *   0.0 or 1.0 the gap in the frame won't be painted because the label
 528  *   will be completely above or below the frame.
 529  *
 530  * Sets the alignment of the frame widget's label. The
 531  * default values for a newly created frame are 0.0 and 0.5.
 532  **/
 533 void
 534 gtk_frame_set_label_align (GtkFrame *frame,
 535                            gfloat    xalign,
 536                            gfloat    yalign)
 537 {
 538   GtkFramePrivate *priv;
 539
 540   g_return_if_fail (GTK_IS_FRAME (frame));
 541
 542   priv = frame->priv;
 543
 544   xalign = CLAMP (xalign, 0.0, 1.0);
 545   yalign = CLAMP (yalign, 0.0, 1.0);
 546
 547   g_object_freeze_notify (G_OBJECT (frame));
 548   if (xalign != priv->label_xalign)
 549     {
 550       priv->label_xalign = xalign;
 551       g_object_notify (G_OBJECT (frame), "label-xalign");
 552     }
 553
 554   if (yalign != priv->label_yalign)
 555     {
 556       priv->label_yalign = yalign;
 557       g_object_notify (G_OBJECT (frame), "label-yalign");
 558     }
 559
 560   g_object_thaw_notify (G_OBJECT (frame));
 561   gtk_widget_queue_resize (GTK_WIDGET (frame));
 562 }
 563
 564 /**
 565  * gtk_frame_get_label_align:
 566  * @frame: a #GtkFrame
 567  * @xalign: (out) (allow-none): location to store X alignment of
 568  *     frame's label, or %NULL
 569  * @yalign: (out) (allow-none): location to store X alignment of
 570  *     frame's label, or %NULL
 571  *
 572  * Retrieves the X and Y alignment of the frame's label. See
 573  * gtk_frame_set_label_align().
 574  **/
 575 void
 576 gtk_frame_get_label_align (GtkFrame *frame,
 577                            gfloat   *xalign,
 578                            gfloat   *yalign)
 579 {
 580   GtkFramePrivate *priv;
 581
 582   g_return_if_fail (GTK_IS_FRAME (frame));
 583
 584   priv = frame->priv;
 585
 586   if (xalign)
 587     *xalign = priv->label_xalign;
 588   if (yalign)
 589     *yalign = priv->label_yalign;
 590 }
 591
 592 /**
 593  * gtk_frame_set_shadow_type:
 594  * @frame: a #GtkFrame
 595  * @type: the new #GtkShadowType
 596  *
 597  * Sets the shadow type for @frame.
 598  **/
 599 void
 600 gtk_frame_set_shadow_type (GtkFrame      *frame,
 601                            GtkShadowType  type)
 602 {
 603   GtkFramePrivate *priv;
 604   GtkWidget *widget;
 605
 606   g_return_if_fail (GTK_IS_FRAME (frame));
 607
 608   priv = frame->priv;
 609
 610   if ((GtkShadowType) priv->shadow_type != type)
 611     {
 612       widget = GTK_WIDGET (frame);
 613       priv->shadow_type = type;
 614       g_object_notify (G_OBJECT (frame), "shadow-type");
 615
 616       if (gtk_widget_is_drawable (widget))
 617         {
 618           gtk_widget_queue_draw (widget);
 619         }
 620
 621       gtk_widget_queue_resize (widget);
 622     }
 623 }
 624
 625 /**
 626  * gtk_frame_get_shadow_type:
 627  * @frame: a #GtkFrame
 628  *
 629  * Retrieves the shadow type of the frame. See
 630  * gtk_frame_set_shadow_type().
 631  *
 632  * Return value: the current shadow type of the frame.
 633  **/
 634 GtkShadowType
 635 gtk_frame_get_shadow_type (GtkFrame *frame)
 636 {
 637   g_return_val_if_fail (GTK_IS_FRAME (frame), GTK_SHADOW_ETCHED_IN);
 638
 639   return frame->priv->shadow_type;
 640 }
 641
 642 static gboolean
 643 gtk_frame_draw (GtkWidget *widget,
 644                 cairo_t   *cr)
 645 {
 646   GtkFrame *frame;
 647   GtkFramePrivate *priv;
 648   GtkStyleContext *context;
 649   GtkStateFlags state;
 650   gint x, y, width, height;
 651   GtkAllocation allocation;
 652   GtkBorder padding;
 653
 654   frame = GTK_FRAME (widget);
 655   priv = frame->priv;
 656
 657   context = gtk_widget_get_style_context (widget);
 658   state = gtk_widget_get_state_flags (widget);
 659   gtk_widget_get_allocation (widget, &allocation);
 660
 661   gtk_style_context_save (context);
 662   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 663
 664   gtk_style_context_get_padding (context, state, &padding);
 665
 666   x = priv->child_allocation.x - allocation.x - padding.left;
 667   y = priv->child_allocation.y - allocation.y - padding.top;
 668   width = priv->child_allocation.width + padding.left + padding.right;
 669   height =  priv->child_allocation.height + padding.top + padding.bottom;
 670
 671   if (priv->shadow_type != GTK_SHADOW_NONE)
 672     {
 673       if (priv->label_widget)
 674         {
 675           gfloat xalign;
 676           gint height_extra;
 677           gint x2;
 678
 679           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 680             xalign = priv->label_xalign;
 681           else
 682             xalign = 1 - priv->label_xalign;
 683
 684           height_extra = MAX (0, priv->label_allocation.height - padding.top)
 685             - priv->label_yalign * priv->label_allocation.height;
 686           y -= height_extra;
 687           height += height_extra;
 688
 689           x2 = padding.left + (priv->child_allocation.width - priv->label_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_SIDE_PAD;
 690           /* If the label is completely over or under the frame we can omit the gap */
 691           if (priv->label_yalign == 0.0 || priv->label_yalign == 1.0)
 692             gtk_render_frame (context, cr, x, y, width, height);
 693           else
 694             gtk_render_frame_gap (context, cr,
 695                                   x, y, width, height,
 696                                   GTK_POS_TOP, x2,
 697                                   x2 + priv->label_allocation.width + 2 * LABEL_PAD);
 698         }
 699       else
 700         gtk_render_frame (context, cr, x, y, width, height);
 701     }
 702
 703   gtk_style_context_restore (context);
 704
 705   GTK_WIDGET_CLASS (gtk_frame_parent_class)->draw (widget, cr);
 706
 707   return FALSE;
 708 }
 709
 710 static void
 711 gtk_frame_size_allocate (GtkWidget     *widget,
 712                          GtkAllocation *allocation)
 713 {
 714   GtkFrame *frame = GTK_FRAME (widget);
 715   GtkFramePrivate *priv = frame->priv;
 716   GtkBin *bin = GTK_BIN (widget);
 717   GtkAllocation new_allocation;
 718   GtkWidget *child;
 719
 720   gtk_widget_set_allocation (widget, allocation);
 721
 722   gtk_frame_compute_child_allocation (frame, &new_allocation);
 723
 724   /* If the child allocation changed, that means that the frame is drawn
 725    * in a new place, so we must redraw the entire widget.
 726    */
 727   if (gtk_widget_get_mapped (widget))
 728     {
 729       gdk_window_invalidate_rect (gtk_widget_get_window (widget), allocation, FALSE);
 730     }
 731
 732   child = gtk_bin_get_child (bin);
 733   if (child && gtk_widget_get_visible (child))
 734     gtk_widget_size_allocate (child, &new_allocation);
 735
 736   priv->child_allocation = new_allocation;
 737
 738   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 739     {
 740       GtkStyleContext *context;
 741       GtkStateFlags state;
 742       GtkBorder padding;
 743       gint nat_width, width, height;
 744       gfloat xalign;
 745
 746       context = gtk_widget_get_style_context (widget);
 747       state = gtk_widget_get_state_flags (widget);
 748
 749       gtk_style_context_save (context);
 750       gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 751
 752       gtk_style_context_get_padding (context, state, &padding);
 753
 754       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 755         xalign = priv->label_xalign;
 756       else
 757         xalign = 1 - priv->label_xalign;
 758
 759       gtk_widget_get_preferred_width (priv->label_widget, NULL, &nat_width);
 760       width = new_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD;
 761       width = MIN (width, nat_width);
 762
 763       gtk_widget_get_preferred_height_for_width (priv->label_widget, width,
 764                                                  &height, NULL);
 765
 766
 767       priv->label_allocation.x = priv->child_allocation.x + LABEL_SIDE_PAD +
 768         (new_allocation.width - width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_PAD;
 769
 770       priv->label_allocation.width = width;
 771
 772       priv->label_allocation.y = priv->child_allocation.y - MAX (height, padding.top);
 773       priv->label_allocation.height = height;
 774
 775       gtk_widget_size_allocate (priv->label_widget, &priv->label_allocation);
 776
 777       gtk_style_context_restore (context);
 778     }
 779 }
 780
 781 static void
 782 gtk_frame_compute_child_allocation (GtkFrame      *frame,
 783                                     GtkAllocation *child_allocation)
 784 {
 785   g_return_if_fail (GTK_IS_FRAME (frame));
 786   g_return_if_fail (child_allocation != NULL);
 787
 788   GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
 789 }
 790
 791 static void
 792 gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
 793                                          GtkAllocation *child_allocation)
 794 {
 795   GtkFramePrivate *priv = frame->priv;
 796   GtkWidget *widget = GTK_WIDGET (frame);
 797   GtkAllocation allocation;
 798   GtkStyleContext *context;
 799   GtkStateFlags state;
 800   GtkBorder padding;
 801   gint top_margin;
 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
 810   gtk_style_context_get_padding (context, state, &padding);
 811   gtk_widget_get_allocation (widget, &allocation);
 812
 813   border_width = gtk_container_get_border_width (GTK_CONTAINER (frame));
 814
 815   if (priv->label_widget)
 816     {
 817       gint nat_width, width, height;
 818
 819       gtk_widget_get_preferred_width (priv->label_widget, NULL, &nat_width);
 820
 821       width = allocation.width;
 822       width -= 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 823       width -= (border_width * 2) + padding.left + padding.right;
 824
 825       width = MIN (width, nat_width);
 826
 827       gtk_widget_get_preferred_height_for_width (priv->label_widget, width,
 828                                                  &height, NULL);
 829
 830       top_margin = MAX (height, padding.top);
 831     }
 832   else
 833     top_margin = padding.top;
 834
 835   child_allocation->x = border_width + padding.left;
 836   child_allocation->y = border_width + top_margin;
 837   child_allocation->width = MAX (1, (gint) allocation.width - (border_width * 2) -
 838                                  padding.left - padding.right);
 839   child_allocation->height = MAX (1, ((gint) allocation.height - child_allocation->y -
 840                                       border_width - padding.bottom));
 841
 842   child_allocation->x += allocation.x;
 843   child_allocation->y += allocation.y;
 844
 845   gtk_style_context_restore (context);
 846 }
 847
 848 static void
 849 gtk_frame_get_preferred_size (GtkWidget      *request,
 850                               GtkOrientation  orientation,
 851                               gint           *minimum_size,
 852                               gint           *natural_size)
 853 {
 854   GtkFrame *frame = GTK_FRAME (request);
 855   GtkFramePrivate *priv = frame->priv;
 856   GtkStyleContext *context;
 857   GtkStateFlags state;
 858   GtkBorder padding;
 859   GtkWidget *widget = GTK_WIDGET (request);
 860   GtkWidget *child;
 861   GtkBin *bin = GTK_BIN (widget);
 862   gint child_min, child_nat;
 863   gint minimum, natural;
 864   guint border_width;
 865
 866   context = gtk_widget_get_style_context (widget);
 867   state = gtk_widget_get_state_flags (widget);
 868
 869   gtk_style_context_save (context);
 870   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 871   gtk_style_context_get_padding (context, state, &padding);
 872
 873   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 874     {
 875       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 876         {
 877           gtk_widget_get_preferred_width (priv->label_widget,
 878                                           &child_min, &child_nat);
 879           minimum = child_min + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 880           natural = child_nat + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 881         }
 882       else
 883         {
 884           gtk_widget_get_preferred_height (priv->label_widget,
 885                                            &child_min, &child_nat);
 886           minimum = MAX (0, child_min - padding.top);
 887           natural = MAX (0, child_nat - padding.top);
 888         }
 889     }
 890   else
 891     {
 892       minimum = 0;
 893       natural = 0;
 894     }
 895
 896   child = gtk_bin_get_child (bin);
 897   if (child && gtk_widget_get_visible (child))
 898     {
 899       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 900         {
 901           gtk_widget_get_preferred_width (child,
 902                                           &child_min, &child_nat);
 903           minimum = MAX (minimum, child_min);
 904           natural = MAX (natural, child_nat);
 905         }
 906       else
 907         {
 908           gtk_widget_get_preferred_height (child,
 909                                            &child_min, &child_nat);
 910           minimum += child_min;
 911           natural += child_nat;
 912         }
 913     }
 914
 915   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 916
 917   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 918     {
 919       minimum += (border_width * 2) + padding.left + padding.right;
 920       natural += (border_width * 2) + padding.left + padding.right;
 921     }
 922   else
 923     {
 924       minimum += (border_width * 2) + padding.top + padding.bottom;
 925       natural += (border_width * 2) + padding.top + padding.bottom;
 926     }
 927
 928  if (minimum_size)
 929     *minimum_size = minimum;
 930
 931   if (natural_size)
 932     *natural_size = natural;
 933
 934   gtk_style_context_restore (context);
 935 }
 936
 937 static void
 938 gtk_frame_get_preferred_width (GtkWidget *widget,
 939                                gint      *minimum_size,
 940                                gint      *natural_size)
 941 {
 942   gtk_frame_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
 943 }
 944
 945 static void
 946 gtk_frame_get_preferred_height (GtkWidget *widget,
 947                                 gint      *minimum_size,
 948                                 gint      *natural_size)
 949 {
 950   gtk_frame_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
 951 }
 952
 953
 954 static void
 955 gtk_frame_get_preferred_height_for_width (GtkWidget *request,
 956                                           gint       width,
 957                                           gint      *minimum_height,
 958                                           gint      *natural_height)
 959 {
 960   GtkWidget *widget = GTK_WIDGET (request);
 961   GtkWidget *child;
 962   GtkFrame *frame = GTK_FRAME (widget);
 963   GtkFramePrivate *priv = frame->priv;
 964   GtkBin *bin = GTK_BIN (widget);
 965   GtkStyleContext *context;
 966   GtkStateFlags state;
 967   GtkBorder padding;
 968   gint child_min, child_nat, label_width;
 969   gint minimum, natural;
 970   guint border_width;
 971
 972   context = gtk_widget_get_style_context (widget);
 973   state = gtk_widget_get_state_flags (widget);
 974
 975   gtk_style_context_save (context);
 976   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 977   gtk_style_context_get_padding (context, state, &padding);
 978
 979   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 980   minimum      = (border_width * 2) + padding.top + padding.bottom;
 981   natural      = (border_width * 2) + padding.top + padding.bottom;
 982
 983   width -= (border_width * 2) + padding.left + padding.right;
 984   label_width = width - 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 985
 986   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 987     {
 988       gtk_widget_get_preferred_height_for_width (priv->label_widget,
 989                                                  label_width, &child_min, &child_nat);
 990       minimum += child_min;
 991       natural += child_nat;
 992     }
 993
 994   child = gtk_bin_get_child (bin);
 995   if (child && gtk_widget_get_visible (child))
 996     {
 997       gtk_widget_get_preferred_height_for_width (child,
 998                                                  width, &child_min, &child_nat);
 999       minimum += child_min;
1000       natural += child_nat;
1001     }
1002
1003  if (minimum_height)
1004     *minimum_height = minimum;
1005
1006   if (natural_height)
1007     *natural_height = natural;
1008
1009   gtk_style_context_restore (context);
1010 }
1011
1012 static void
1013 gtk_frame_get_preferred_width_for_height (GtkWidget *widget,
1014                                           gint       height,
1015                                           gint      *minimum_width,
1016                                           gint      *natural_width)
1017 {
1018   GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
1019 }
1020