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   GtkStyleContext *context;
 254
 255   frame->priv = G_TYPE_INSTANCE_GET_PRIVATE (frame,
 256                                              GTK_TYPE_FRAME,
 257                                              GtkFramePrivate);
 258   priv = frame->priv;
 259
 260   priv->label_widget = NULL;
 261   priv->shadow_type = GTK_SHADOW_ETCHED_IN;
 262   priv->label_xalign = 0.0;
 263   priv->label_yalign = 0.5;
 264
 265   context = gtk_widget_get_style_context (GTK_WIDGET (frame));
 266   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
 267 }
 268
 269 static void
 270 gtk_frame_set_property (GObject         *object,
 271                         guint            prop_id,
 272                         const GValue    *value,
 273                         GParamSpec      *pspec)
 274 {
 275   GtkFrame *frame = GTK_FRAME (object);
 276   GtkFramePrivate *priv = frame->priv;
 277
 278   switch (prop_id)
 279     {
 280     case PROP_LABEL:
 281       gtk_frame_set_label (frame, g_value_get_string (value));
 282       break;
 283     case PROP_LABEL_XALIGN:
 284       gtk_frame_set_label_align (frame, g_value_get_float (value),
 285                                  priv->label_yalign);
 286       break;
 287     case PROP_LABEL_YALIGN:
 288       gtk_frame_set_label_align (frame, priv->label_xalign,
 289                                  g_value_get_float (value));
 290       break;
 291     case PROP_SHADOW_TYPE:
 292       gtk_frame_set_shadow_type (frame, g_value_get_enum (value));
 293       break;
 294     case PROP_LABEL_WIDGET:
 295       gtk_frame_set_label_widget (frame, g_value_get_object (value));
 296       break;
 297     default:
 298       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 299       break;
 300     }
 301 }
 302
 303 static void
 304 gtk_frame_get_property (GObject         *object,
 305                         guint            prop_id,
 306                         GValue          *value,
 307                         GParamSpec      *pspec)
 308 {
 309   GtkFrame *frame = GTK_FRAME (object);
 310   GtkFramePrivate *priv = frame->priv;
 311
 312   switch (prop_id)
 313     {
 314     case PROP_LABEL:
 315       g_value_set_string (value, gtk_frame_get_label (frame));
 316       break;
 317     case PROP_LABEL_XALIGN:
 318       g_value_set_float (value, priv->label_xalign);
 319       break;
 320     case PROP_LABEL_YALIGN:
 321       g_value_set_float (value, priv->label_yalign);
 322       break;
 323     case PROP_SHADOW_TYPE:
 324       g_value_set_enum (value, priv->shadow_type);
 325       break;
 326     case PROP_LABEL_WIDGET:
 327       g_value_set_object (value,
 328                           priv->label_widget ?
 329                           G_OBJECT (priv->label_widget) : NULL);
 330       break;
 331     default:
 332       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 333       break;
 334     }
 335 }
 336
 337 /**
 338  * gtk_frame_new:
 339  * @label: the text to use as the label of the frame
 340  *
 341  * Creates a new #GtkFrame, with optional label @label.
 342  * If @label is %NULL, the label is omitted.
 343  *
 344  * Return value: a new #GtkFrame widget
 345  **/
 346 GtkWidget*
 347 gtk_frame_new (const gchar *label)
 348 {
 349   return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
 350 }
 351
 352 static void
 353 gtk_frame_remove (GtkContainer *container,
 354                   GtkWidget    *child)
 355 {
 356   GtkFrame *frame = GTK_FRAME (container);
 357   GtkFramePrivate *priv = frame->priv;
 358
 359   if (priv->label_widget == child)
 360     gtk_frame_set_label_widget (frame, NULL);
 361   else
 362     GTK_CONTAINER_CLASS (gtk_frame_parent_class)->remove (container, child);
 363 }
 364
 365 static void
 366 gtk_frame_forall (GtkContainer *container,
 367                   gboolean      include_internals,
 368                   GtkCallback   callback,
 369                   gpointer      callback_data)
 370 {
 371   GtkBin *bin = GTK_BIN (container);
 372   GtkFrame *frame = GTK_FRAME (container);
 373   GtkFramePrivate *priv = frame->priv;
 374   GtkWidget *child;
 375
 376   child = gtk_bin_get_child (bin);
 377   if (child)
 378     (* callback) (child, callback_data);
 379
 380   if (priv->label_widget)
 381     (* callback) (priv->label_widget, callback_data);
 382 }
 383
 384 static GtkWidgetPath *
 385 gtk_frame_get_path_for_child (GtkContainer *container,
 386                               GtkWidget    *child)
 387 {
 388   GtkFramePrivate *priv = GTK_FRAME (container)->priv;
 389   GtkWidgetPath *path;
 390
 391   path = GTK_CONTAINER_CLASS (gtk_frame_parent_class)->get_path_for_child (container, child);
 392
 393   if (child == priv->label_widget)
 394     gtk_widget_path_iter_add_class (path,
 395                                     gtk_widget_path_length (path) - 2,
 396                                     GTK_STYLE_CLASS_FRAME);
 397
 398   return path;
 399 }
 400
 401 /**
 402  * gtk_frame_set_label:
 403  * @frame: a #GtkFrame
 404  * @label: (allow-none): the text to use as the label of the frame
 405  *
 406  * Sets the text of the label. If @label is %NULL,
 407  * the current label is removed.
 408  **/
 409 void
 410 gtk_frame_set_label (GtkFrame *frame,
 411                      const gchar *label)
 412 {
 413   g_return_if_fail (GTK_IS_FRAME (frame));
 414
 415   if (!label)
 416     {
 417       gtk_frame_set_label_widget (frame, NULL);
 418     }
 419   else
 420     {
 421       GtkWidget *child = gtk_label_new (label);
 422       gtk_widget_show (child);
 423
 424       gtk_frame_set_label_widget (frame, child);
 425     }
 426 }
 427
 428 /**
 429  * gtk_frame_get_label:
 430  * @frame: a #GtkFrame
 431  *
 432  * If the frame's label widget is a #GtkLabel, returns the
 433  * text in the label widget. (The frame will have a #GtkLabel
 434  * for the label widget if a non-%NULL argument was passed
 435  * to gtk_frame_new().)
 436  *
 437  * Return value: the text in the label, or %NULL if there
 438  *               was no label widget or the lable widget was not
 439  *               a #GtkLabel. This string is owned by GTK+ and
 440  *               must not be modified or freed.
 441  **/
 442 const gchar *
 443 gtk_frame_get_label (GtkFrame *frame)
 444 {
 445   GtkFramePrivate *priv;
 446
 447   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 448
 449   priv = frame->priv;
 450
 451   if (GTK_IS_LABEL (priv->label_widget))
 452     return gtk_label_get_text (GTK_LABEL (priv->label_widget));
 453   else
 454     return NULL;
 455 }
 456
 457 /**
 458  * gtk_frame_set_label_widget:
 459  * @frame: a #GtkFrame
 460  * @label_widget: the new label widget
 461  *
 462  * Sets the label widget for the frame. This is the widget that
 463  * will appear embedded in the top edge of the frame as a
 464  * title.
 465  **/
 466 void
 467 gtk_frame_set_label_widget (GtkFrame  *frame,
 468                             GtkWidget *label_widget)
 469 {
 470   GtkFramePrivate *priv;
 471   gboolean need_resize = FALSE;
 472
 473   g_return_if_fail (GTK_IS_FRAME (frame));
 474   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
 475   g_return_if_fail (label_widget == NULL || gtk_widget_get_parent (label_widget) == NULL);
 476
 477   priv = frame->priv;
 478
 479   if (priv->label_widget == label_widget)
 480     return;
 481
 482   if (priv->label_widget)
 483     {
 484       need_resize = gtk_widget_get_visible (priv->label_widget);
 485       gtk_widget_unparent (priv->label_widget);
 486     }
 487
 488   priv->label_widget = label_widget;
 489
 490   if (label_widget)
 491     {
 492       priv->label_widget = label_widget;
 493       gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
 494       need_resize |= gtk_widget_get_visible (label_widget);
 495     }
 496
 497   if (gtk_widget_get_visible (GTK_WIDGET (frame)) && need_resize)
 498     gtk_widget_queue_resize (GTK_WIDGET (frame));
 499
 500   g_object_freeze_notify (G_OBJECT (frame));
 501   g_object_notify (G_OBJECT (frame), "label-widget");
 502   g_object_notify (G_OBJECT (frame), "label");
 503   g_object_thaw_notify (G_OBJECT (frame));
 504 }
 505
 506 /**
 507  * gtk_frame_get_label_widget:
 508  * @frame: a #GtkFrame
 509  *
 510  * Retrieves the label widget for the frame. See
 511  * gtk_frame_set_label_widget().
 512  *
 513  * Return value: (transfer none): the label widget, or %NULL if there is none.
 514  **/
 515 GtkWidget *
 516 gtk_frame_get_label_widget (GtkFrame *frame)
 517 {
 518   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 519
 520   return frame->priv->label_widget;
 521 }
 522
 523 /**
 524  * gtk_frame_set_label_align:
 525  * @frame: a #GtkFrame
 526  * @xalign: The position of the label along the top edge
 527  *   of the widget. A value of 0.0 represents left alignment;
 528  *   1.0 represents right alignment.
 529  * @yalign: The y alignment of the label. A value of 0.0 aligns under
 530  *   the frame; 1.0 aligns above the frame. If the values are exactly
 531  *   0.0 or 1.0 the gap in the frame won't be painted because the label
 532  *   will be completely above or below the frame.
 533  *
 534  * Sets the alignment of the frame widget's label. The
 535  * default values for a newly created frame are 0.0 and 0.5.
 536  **/
 537 void
 538 gtk_frame_set_label_align (GtkFrame *frame,
 539                            gfloat    xalign,
 540                            gfloat    yalign)
 541 {
 542   GtkFramePrivate *priv;
 543
 544   g_return_if_fail (GTK_IS_FRAME (frame));
 545
 546   priv = frame->priv;
 547
 548   xalign = CLAMP (xalign, 0.0, 1.0);
 549   yalign = CLAMP (yalign, 0.0, 1.0);
 550
 551   g_object_freeze_notify (G_OBJECT (frame));
 552   if (xalign != priv->label_xalign)
 553     {
 554       priv->label_xalign = xalign;
 555       g_object_notify (G_OBJECT (frame), "label-xalign");
 556     }
 557
 558   if (yalign != priv->label_yalign)
 559     {
 560       priv->label_yalign = yalign;
 561       g_object_notify (G_OBJECT (frame), "label-yalign");
 562     }
 563
 564   g_object_thaw_notify (G_OBJECT (frame));
 565   gtk_widget_queue_resize (GTK_WIDGET (frame));
 566 }
 567
 568 /**
 569  * gtk_frame_get_label_align:
 570  * @frame: a #GtkFrame
 571  * @xalign: (out) (allow-none): location to store X alignment of
 572  *     frame's label, or %NULL
 573  * @yalign: (out) (allow-none): location to store X alignment of
 574  *     frame's label, or %NULL
 575  *
 576  * Retrieves the X and Y alignment of the frame's label. See
 577  * gtk_frame_set_label_align().
 578  **/
 579 void
 580 gtk_frame_get_label_align (GtkFrame *frame,
 581                            gfloat   *xalign,
 582                            gfloat   *yalign)
 583 {
 584   GtkFramePrivate *priv;
 585
 586   g_return_if_fail (GTK_IS_FRAME (frame));
 587
 588   priv = frame->priv;
 589
 590   if (xalign)
 591     *xalign = priv->label_xalign;
 592   if (yalign)
 593     *yalign = priv->label_yalign;
 594 }
 595
 596 /**
 597  * gtk_frame_set_shadow_type:
 598  * @frame: a #GtkFrame
 599  * @type: the new #GtkShadowType
 600  *
 601  * Sets the shadow type for @frame.
 602  **/
 603 void
 604 gtk_frame_set_shadow_type (GtkFrame      *frame,
 605                            GtkShadowType  type)
 606 {
 607   GtkFramePrivate *priv;
 608   GtkWidget *widget;
 609
 610   g_return_if_fail (GTK_IS_FRAME (frame));
 611
 612   priv = frame->priv;
 613
 614   if ((GtkShadowType) priv->shadow_type != type)
 615     {
 616       widget = GTK_WIDGET (frame);
 617       priv->shadow_type = type;
 618       g_object_notify (G_OBJECT (frame), "shadow-type");
 619
 620       if (gtk_widget_is_drawable (widget))
 621         {
 622           gtk_widget_queue_draw (widget);
 623         }
 624
 625       gtk_widget_queue_resize (widget);
 626     }
 627 }
 628
 629 /**
 630  * gtk_frame_get_shadow_type:
 631  * @frame: a #GtkFrame
 632  *
 633  * Retrieves the shadow type of the frame. See
 634  * gtk_frame_set_shadow_type().
 635  *
 636  * Return value: the current shadow type of the frame.
 637  **/
 638 GtkShadowType
 639 gtk_frame_get_shadow_type (GtkFrame *frame)
 640 {
 641   g_return_val_if_fail (GTK_IS_FRAME (frame), GTK_SHADOW_ETCHED_IN);
 642
 643   return frame->priv->shadow_type;
 644 }
 645
 646 static void
 647 get_padding_and_border (GtkFrame *frame,
 648                         GtkBorder *border)
 649 {
 650   GtkStyleContext *context;
 651   GtkStateFlags state;
 652
 653   context = gtk_widget_get_style_context (GTK_WIDGET (frame));
 654   state = gtk_widget_get_state_flags (GTK_WIDGET (frame));
 655
 656   gtk_style_context_get_padding (context, state, border);
 657
 658   if (frame->priv->shadow_type != GTK_SHADOW_NONE)
 659     {
 660       GtkBorder tmp;
 661
 662       gtk_style_context_get_border (context, state, &tmp);
 663       border->top += tmp.top;
 664       border->right += tmp.right;
 665       border->bottom += tmp.bottom;
 666       border->left += tmp.left;
 667     }
 668 }
 669
 670 static gboolean
 671 gtk_frame_draw (GtkWidget *widget,
 672                 cairo_t   *cr)
 673 {
 674   GtkFrame *frame;
 675   GtkFramePrivate *priv;
 676   GtkStyleContext *context;
 677   gint x, y, width, height;
 678   GtkAllocation allocation;
 679   GtkBorder padding;
 680
 681   frame = GTK_FRAME (widget);
 682   priv = frame->priv;
 683
 684   gtk_widget_get_allocation (widget, &allocation);
 685   get_padding_and_border (frame, &padding);
 686   context = gtk_widget_get_style_context (widget);
 687
 688   x = priv->child_allocation.x - allocation.x - padding.left;
 689   y = priv->child_allocation.y - allocation.y - padding.top;
 690   width = priv->child_allocation.width + padding.left + padding.right;
 691   height =  priv->child_allocation.height + padding.top + padding.bottom;
 692
 693   if (priv->shadow_type != GTK_SHADOW_NONE)
 694     {
 695       if (priv->label_widget)
 696         {
 697           gfloat xalign;
 698           gint height_extra;
 699           gint x2;
 700
 701           if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 702             xalign = priv->label_xalign;
 703           else
 704             xalign = 1 - priv->label_xalign;
 705
 706           height_extra = MAX (0, priv->label_allocation.height - padding.top)
 707             - priv->label_yalign * priv->label_allocation.height;
 708           y -= height_extra;
 709           height += height_extra;
 710
 711           x2 = padding.left + (priv->child_allocation.width - priv->label_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_SIDE_PAD;
 712           /* If the label is completely over or under the frame we can omit the gap */
 713           if (priv->label_yalign == 0.0 || priv->label_yalign == 1.0)
 714             gtk_render_frame (context, cr, x, y, width, height);
 715           else
 716             gtk_render_frame_gap (context, cr,
 717                                   x, y, width, height,
 718                                   GTK_POS_TOP, x2,
 719                                   x2 + priv->label_allocation.width + 2 * LABEL_PAD);
 720         }
 721       else
 722         gtk_render_frame (context, cr, x, y, width, height);
 723     }
 724
 725   GTK_WIDGET_CLASS (gtk_frame_parent_class)->draw (widget, cr);
 726
 727   return FALSE;
 728 }
 729
 730 static void
 731 gtk_frame_size_allocate (GtkWidget     *widget,
 732                          GtkAllocation *allocation)
 733 {
 734   GtkFrame *frame = GTK_FRAME (widget);
 735   GtkFramePrivate *priv = frame->priv;
 736   GtkBin *bin = GTK_BIN (widget);
 737   GtkAllocation new_allocation;
 738   GtkWidget *child;
 739
 740   gtk_widget_set_allocation (widget, allocation);
 741
 742   gtk_frame_compute_child_allocation (frame, &new_allocation);
 743
 744   /* If the child allocation changed, that means that the frame is drawn
 745    * in a new place, so we must redraw the entire widget.
 746    */
 747   if (gtk_widget_get_mapped (widget))
 748     {
 749       gdk_window_invalidate_rect (gtk_widget_get_window (widget), allocation, FALSE);
 750     }
 751
 752   child = gtk_bin_get_child (bin);
 753   if (child && gtk_widget_get_visible (child))
 754     gtk_widget_size_allocate (child, &new_allocation);
 755
 756   priv->child_allocation = new_allocation;
 757
 758   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 759     {
 760       GtkBorder padding;
 761       gint nat_width, width, height;
 762       gfloat xalign;
 763
 764       get_padding_and_border (frame, &padding);
 765
 766       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 767         xalign = priv->label_xalign;
 768       else
 769         xalign = 1 - priv->label_xalign;
 770
 771       gtk_widget_get_preferred_width (priv->label_widget, NULL, &nat_width);
 772       width = new_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD;
 773       width = MIN (width, nat_width);
 774
 775       gtk_widget_get_preferred_height_for_width (priv->label_widget, width,
 776                                                  &height, NULL);
 777
 778
 779       priv->label_allocation.x = priv->child_allocation.x + LABEL_SIDE_PAD +
 780         (new_allocation.width - width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_PAD;
 781
 782       priv->label_allocation.width = width;
 783
 784       priv->label_allocation.y = priv->child_allocation.y - MAX (height, padding.top);
 785       priv->label_allocation.height = height;
 786
 787       gtk_widget_size_allocate (priv->label_widget, &priv->label_allocation);
 788     }
 789 }
 790
 791 static void
 792 gtk_frame_compute_child_allocation (GtkFrame      *frame,
 793                                     GtkAllocation *child_allocation)
 794 {
 795   g_return_if_fail (GTK_IS_FRAME (frame));
 796   g_return_if_fail (child_allocation != NULL);
 797
 798   GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
 799 }
 800
 801 static void
 802 gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
 803                                          GtkAllocation *child_allocation)
 804 {
 805   GtkFramePrivate *priv = frame->priv;
 806   GtkWidget *widget = GTK_WIDGET (frame);
 807   GtkAllocation allocation;
 808   GtkBorder padding;
 809   gint top_margin;
 810   guint border_width;
 811
 812   gtk_widget_get_allocation (widget, &allocation);
 813   get_padding_and_border (frame, &padding);
 814   border_width = gtk_container_get_border_width (GTK_CONTAINER (frame));
 815
 816   if (priv->label_widget)
 817     {
 818       gint nat_width, width, height;
 819
 820       gtk_widget_get_preferred_width (priv->label_widget, NULL, &nat_width);
 821
 822       width = allocation.width;
 823       width -= 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 824       width -= (border_width * 2) + padding.left + padding.right;
 825
 826       width = MIN (width, nat_width);
 827
 828       gtk_widget_get_preferred_height_for_width (priv->label_widget, width,
 829                                                  &height, NULL);
 830
 831       top_margin = MAX (height, padding.top);
 832     }
 833   else
 834     top_margin = padding.top;
 835
 836   child_allocation->x = border_width + padding.left;
 837   child_allocation->y = border_width + top_margin;
 838   child_allocation->width = MAX (1, (gint) (allocation.width - (border_width * 2) -
 839                                             padding.left - padding.right));
 840   child_allocation->height = MAX (1, (gint) (allocation.height - child_allocation->y -
 841                                              border_width - padding.bottom));
 842
 843   child_allocation->x += allocation.x;
 844   child_allocation->y += allocation.y;
 845 }
 846
 847 static void
 848 gtk_frame_get_preferred_size (GtkWidget      *request,
 849                               GtkOrientation  orientation,
 850                               gint           *minimum_size,
 851                               gint           *natural_size)
 852 {
 853   GtkFrame *frame = GTK_FRAME (request);
 854   GtkFramePrivate *priv = frame->priv;
 855   GtkBorder padding;
 856   GtkWidget *widget = GTK_WIDGET (request);
 857   GtkWidget *child;
 858   GtkBin *bin = GTK_BIN (widget);
 859   gint child_min, child_nat;
 860   gint minimum, natural;
 861   guint border_width;
 862
 863   get_padding_and_border (frame, &padding);
 864   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 865
 866   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 867     {
 868       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 869         {
 870           gtk_widget_get_preferred_width (priv->label_widget,
 871                                           &child_min, &child_nat);
 872           minimum = child_min + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 873           natural = child_nat + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 874         }
 875       else
 876         {
 877           gtk_widget_get_preferred_height (priv->label_widget,
 878                                            &child_min, &child_nat);
 879           minimum = MAX (0, child_min - padding.top);
 880           natural = MAX (0, child_nat - padding.top);
 881         }
 882     }
 883   else
 884     {
 885       minimum = 0;
 886       natural = 0;
 887     }
 888
 889   child = gtk_bin_get_child (bin);
 890   if (child && gtk_widget_get_visible (child))
 891     {
 892       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 893         {
 894           gtk_widget_get_preferred_width (child,
 895                                           &child_min, &child_nat);
 896           minimum = MAX (minimum, child_min);
 897           natural = MAX (natural, child_nat);
 898         }
 899       else
 900         {
 901           gtk_widget_get_preferred_height (child,
 902                                            &child_min, &child_nat);
 903           minimum += child_min;
 904           natural += child_nat;
 905         }
 906     }
 907
 908   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 909     {
 910       minimum += (border_width * 2) + padding.left + padding.right;
 911       natural += (border_width * 2) + padding.left + padding.right;
 912     }
 913   else
 914     {
 915       minimum += (border_width * 2) + padding.top + padding.bottom;
 916       natural += (border_width * 2) + padding.top + padding.bottom;
 917     }
 918
 919  if (minimum_size)
 920     *minimum_size = minimum;
 921
 922   if (natural_size)
 923     *natural_size = natural;
 924 }
 925
 926 static void
 927 gtk_frame_get_preferred_width (GtkWidget *widget,
 928                                gint      *minimum_size,
 929                                gint      *natural_size)
 930 {
 931   gtk_frame_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
 932 }
 933
 934 static void
 935 gtk_frame_get_preferred_height (GtkWidget *widget,
 936                                 gint      *minimum_size,
 937                                 gint      *natural_size)
 938 {
 939   gtk_frame_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
 940 }
 941
 942
 943 static void
 944 gtk_frame_get_preferred_height_for_width (GtkWidget *request,
 945                                           gint       width,
 946                                           gint      *minimum_height,
 947                                           gint      *natural_height)
 948 {
 949   GtkWidget *widget = GTK_WIDGET (request);
 950   GtkWidget *child;
 951   GtkFrame *frame = GTK_FRAME (widget);
 952   GtkFramePrivate *priv = frame->priv;
 953   GtkBin *bin = GTK_BIN (widget);
 954   GtkBorder padding;
 955   gint child_min, child_nat, label_width;
 956   gint minimum, natural;
 957   guint border_width;
 958
 959   get_padding_and_border (frame, &padding);
 960   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 961
 962   minimum = (border_width * 2) + padding.top + padding.bottom;
 963   natural = (border_width * 2) + padding.top + padding.bottom;
 964
 965   width -= (border_width * 2) + padding.left + padding.right;
 966   label_width = width - 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 967
 968   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 969     {
 970       gtk_widget_get_preferred_height_for_width (priv->label_widget,
 971                                                  label_width, &child_min, &child_nat);
 972       minimum += child_min;
 973       natural += child_nat;
 974     }
 975
 976   child = gtk_bin_get_child (bin);
 977   if (child && gtk_widget_get_visible (child))
 978     {
 979       gtk_widget_get_preferred_height_for_width (child,
 980                                                  width, &child_min, &child_nat);
 981       minimum += child_min;
 982       natural += child_nat;
 983     }
 984
 985  if (minimum_height)
 986     *minimum_height = minimum;
 987
 988   if (natural_height)
 989     *natural_height = natural;
 990 }
 991
 992 static void
 993 gtk_frame_get_preferred_width_for_height (GtkWidget *widget,
 994                                           gint       height,
 995                                           gint      *minimum_width,
 996                                           gint      *natural_width)
 997 {
 998   GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
 999 }
1000