Pileus Git - ~andy/gtk/blob - gtk/gtkframe.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "config.h"
  28 #include <string.h>
  29 #include "gtkframe.h"
  30 #include "gtklabel.h"
  31 #include "gtkprivate.h"
  32 #include "gtkintl.h"
  33 #include "gtkbuildable.h"
  34 #include "gtksizerequest.h"
  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_size_request_init             (GtkSizeRequestIface *iface);
  94 static void gtk_frame_get_width                     (GtkSizeRequest      *widget,
  95                                                      gint                *minimum_size,
  96                                                      gint                *natural_size);
  97 static void gtk_frame_get_height                    (GtkSizeRequest      *widget,
  98                                                      gint                *minimum_size,
  99                                                      gint                *natural_size);
 100 static void gtk_frame_get_height_for_width          (GtkSizeRequest      *layout,
 101                                                      gint                 width,
 102                                                      gint                *minimum_height,
 103                                                      gint                *natural_height);
 104 static void gtk_frame_get_width_for_height          (GtkSizeRequest      *layout,
 105                                                      gint                 width,
 106                                                      gint                *minimum_height,
 107                                                      gint                *natural_height);
 108
 109
 110 G_DEFINE_TYPE_WITH_CODE (GtkFrame, gtk_frame, GTK_TYPE_BIN,
 111                          G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
 112                                                 gtk_frame_buildable_init)
 113                          G_IMPLEMENT_INTERFACE (GTK_TYPE_SIZE_REQUEST,
 114                                                 gtk_frame_size_request_init))
 115
 116 static void
 117 gtk_frame_class_init (GtkFrameClass *class)
 118 {
 119   GObjectClass *gobject_class;
 120   GtkWidgetClass *widget_class;
 121   GtkContainerClass *container_class;
 122
 123   gobject_class = (GObjectClass*) class;
 124   widget_class = GTK_WIDGET_CLASS (class);
 125   container_class = GTK_CONTAINER_CLASS (class);
 126
 127   gobject_class->set_property = gtk_frame_set_property;
 128   gobject_class->get_property = gtk_frame_get_property;
 129
 130   g_object_class_install_property (gobject_class,
 131                                    PROP_LABEL,
 132                                    g_param_spec_string ("label",
 133                                                         P_("Label"),
 134                                                         P_("Text of the frame's label"),
 135                                                         NULL,
 136                                                         GTK_PARAM_READABLE |
 137                                                         GTK_PARAM_WRITABLE));
 138   g_object_class_install_property (gobject_class,
 139                                    PROP_LABEL_XALIGN,
 140                                    g_param_spec_float ("label-xalign",
 141                                                        P_("Label xalign"),
 142                                                        P_("The horizontal alignment of the label"),
 143                                                        0.0,
 144                                                        1.0,
 145                                                        0.0,
 146                                                        GTK_PARAM_READWRITE));
 147   g_object_class_install_property (gobject_class,
 148                                    PROP_LABEL_YALIGN,
 149                                    g_param_spec_float ("label-yalign",
 150                                                        P_("Label yalign"),
 151                                                        P_("The vertical alignment of the label"),
 152                                                        0.0,
 153                                                        1.0,
 154                                                        0.5,
 155                                                        GTK_PARAM_READWRITE));
 156   g_object_class_install_property (gobject_class,
 157                                    PROP_SHADOW_TYPE,
 158                                    g_param_spec_enum ("shadow-type",
 159                                                       P_("Frame shadow"),
 160                                                       P_("Appearance of the frame border"),
 161                                                       GTK_TYPE_SHADOW_TYPE,
 162                                                       GTK_SHADOW_ETCHED_IN,
 163                                                       GTK_PARAM_READWRITE));
 164
 165   g_object_class_install_property (gobject_class,
 166                                    PROP_LABEL_WIDGET,
 167                                    g_param_spec_object ("label-widget",
 168                                                         P_("Label widget"),
 169                                                         P_("A widget to display in place of the usual frame label"),
 170                                                         GTK_TYPE_WIDGET,
 171                                                         GTK_PARAM_READWRITE));
 172
 173   widget_class->draw = gtk_frame_draw;
 174   widget_class->size_allocate = gtk_frame_size_allocate;
 175
 176   container_class->remove = gtk_frame_remove;
 177   container_class->forall = gtk_frame_forall;
 178
 179   class->compute_child_allocation = gtk_frame_real_compute_child_allocation;
 180
 181   g_type_class_add_private (class, sizeof (GtkFramePrivate));
 182 }
 183
 184 static void
 185 gtk_frame_buildable_init (GtkBuildableIface *iface)
 186 {
 187   iface->add_child = gtk_frame_buildable_add_child;
 188 }
 189
 190 static void
 191 gtk_frame_buildable_add_child (GtkBuildable *buildable,
 192                                GtkBuilder   *builder,
 193                                GObject      *child,
 194                                const gchar  *type)
 195 {
 196   if (type && strcmp (type, "label") == 0)
 197     gtk_frame_set_label_widget (GTK_FRAME (buildable), GTK_WIDGET (child));
 198   else if (!type)
 199     gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
 200   else
 201     GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_FRAME (buildable), type);
 202 }
 203
 204 static void
 205 gtk_frame_init (GtkFrame *frame)
 206 {
 207   GtkFramePrivate *priv;
 208
 209   frame->priv = G_TYPE_INSTANCE_GET_PRIVATE (frame,
 210                                              GTK_TYPE_FRAME,
 211                                              GtkFramePrivate);
 212   priv = frame->priv;
 213
 214   priv->label_widget = NULL;
 215   priv->shadow_type = GTK_SHADOW_ETCHED_IN;
 216   priv->label_xalign = 0.0;
 217   priv->label_yalign = 0.5;
 218 }
 219
 220 static void
 221 gtk_frame_set_property (GObject         *object,
 222                         guint            prop_id,
 223                         const GValue    *value,
 224                         GParamSpec      *pspec)
 225 {
 226   GtkFrame *frame = GTK_FRAME (object);
 227   GtkFramePrivate *priv = frame->priv;
 228
 229   switch (prop_id)
 230     {
 231     case PROP_LABEL:
 232       gtk_frame_set_label (frame, g_value_get_string (value));
 233       break;
 234     case PROP_LABEL_XALIGN:
 235       gtk_frame_set_label_align (frame, g_value_get_float (value),
 236                                  priv->label_yalign);
 237       break;
 238     case PROP_LABEL_YALIGN:
 239       gtk_frame_set_label_align (frame, priv->label_xalign,
 240                                  g_value_get_float (value));
 241       break;
 242     case PROP_SHADOW_TYPE:
 243       gtk_frame_set_shadow_type (frame, g_value_get_enum (value));
 244       break;
 245     case PROP_LABEL_WIDGET:
 246       gtk_frame_set_label_widget (frame, g_value_get_object (value));
 247       break;
 248     default:
 249       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 250       break;
 251     }
 252 }
 253
 254 static void
 255 gtk_frame_get_property (GObject         *object,
 256                         guint            prop_id,
 257                         GValue          *value,
 258                         GParamSpec      *pspec)
 259 {
 260   GtkFrame *frame = GTK_FRAME (object);
 261   GtkFramePrivate *priv = frame->priv;
 262
 263   switch (prop_id)
 264     {
 265     case PROP_LABEL:
 266       g_value_set_string (value, gtk_frame_get_label (frame));
 267       break;
 268     case PROP_LABEL_XALIGN:
 269       g_value_set_float (value, priv->label_xalign);
 270       break;
 271     case PROP_LABEL_YALIGN:
 272       g_value_set_float (value, priv->label_yalign);
 273       break;
 274     case PROP_SHADOW_TYPE:
 275       g_value_set_enum (value, priv->shadow_type);
 276       break;
 277     case PROP_LABEL_WIDGET:
 278       g_value_set_object (value,
 279                           priv->label_widget ?
 280                           G_OBJECT (priv->label_widget) : NULL);
 281       break;
 282     default:
 283       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 284       break;
 285     }
 286 }
 287
 288 /**
 289  * gtk_frame_new:
 290  * @label: the text to use as the label of the frame
 291  *
 292  * Creates a new #GtkFrame, with optional label @label.
 293  * If @label is %NULL, the label is omitted.
 294  *
 295  * Return value: a new #GtkFrame widget
 296  **/
 297 GtkWidget*
 298 gtk_frame_new (const gchar *label)
 299 {
 300   return g_object_new (GTK_TYPE_FRAME, "label", label, NULL);
 301 }
 302
 303 static void
 304 gtk_frame_remove (GtkContainer *container,
 305                   GtkWidget    *child)
 306 {
 307   GtkFrame *frame = GTK_FRAME (container);
 308   GtkFramePrivate *priv = frame->priv;
 309
 310   if (priv->label_widget == child)
 311     gtk_frame_set_label_widget (frame, NULL);
 312   else
 313     GTK_CONTAINER_CLASS (gtk_frame_parent_class)->remove (container, child);
 314 }
 315
 316 static void
 317 gtk_frame_forall (GtkContainer *container,
 318                   gboolean      include_internals,
 319                   GtkCallback   callback,
 320                   gpointer      callback_data)
 321 {
 322   GtkBin *bin = GTK_BIN (container);
 323   GtkFrame *frame = GTK_FRAME (container);
 324   GtkFramePrivate *priv = frame->priv;
 325   GtkWidget *child;
 326
 327   child = gtk_bin_get_child (bin);
 328   if (child)
 329     (* callback) (child, callback_data);
 330
 331   if (priv->label_widget)
 332     (* callback) (priv->label_widget, callback_data);
 333 }
 334
 335 /**
 336  * gtk_frame_set_label:
 337  * @frame: a #GtkFrame
 338  * @label: (allow-none): the text to use as the label of the frame
 339  *
 340  * Sets the text of the label. If @label is %NULL,
 341  * the current label is removed.
 342  **/
 343 void
 344 gtk_frame_set_label (GtkFrame *frame,
 345                      const gchar *label)
 346 {
 347   g_return_if_fail (GTK_IS_FRAME (frame));
 348
 349   if (!label)
 350     {
 351       gtk_frame_set_label_widget (frame, NULL);
 352     }
 353   else
 354     {
 355       GtkWidget *child = gtk_label_new (label);
 356       gtk_widget_show (child);
 357
 358       gtk_frame_set_label_widget (frame, child);
 359     }
 360 }
 361
 362 /**
 363  * gtk_frame_get_label:
 364  * @frame: a #GtkFrame
 365  *
 366  * If the frame's label widget is a #GtkLabel, returns the
 367  * text in the label widget. (The frame will have a #GtkLabel
 368  * for the label widget if a non-%NULL argument was passed
 369  * to gtk_frame_new().)
 370  *
 371  * Return value: the text in the label, or %NULL if there
 372  *               was no label widget or the lable widget was not
 373  *               a #GtkLabel. This string is owned by GTK+ and
 374  *               must not be modified or freed.
 375  **/
 376 G_CONST_RETURN gchar *
 377 gtk_frame_get_label (GtkFrame *frame)
 378 {
 379   GtkFramePrivate *priv;
 380
 381   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 382
 383   priv = frame->priv;
 384
 385   if (GTK_IS_LABEL (priv->label_widget))
 386     return gtk_label_get_text (GTK_LABEL (priv->label_widget));
 387   else
 388     return NULL;
 389 }
 390
 391 /**
 392  * gtk_frame_set_label_widget:
 393  * @frame: a #GtkFrame
 394  * @label_widget: the new label widget
 395  *
 396  * Sets the label widget for the frame. This is the widget that
 397  * will appear embedded in the top edge of the frame as a
 398  * title.
 399  **/
 400 void
 401 gtk_frame_set_label_widget (GtkFrame  *frame,
 402                             GtkWidget *label_widget)
 403 {
 404   GtkFramePrivate *priv;
 405   gboolean need_resize = FALSE;
 406
 407   g_return_if_fail (GTK_IS_FRAME (frame));
 408   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
 409   g_return_if_fail (label_widget == NULL || gtk_widget_get_parent (label_widget) == NULL);
 410
 411   priv = frame->priv;
 412
 413   if (priv->label_widget == label_widget)
 414     return;
 415
 416   if (priv->label_widget)
 417     {
 418       need_resize = gtk_widget_get_visible (priv->label_widget);
 419       gtk_widget_unparent (priv->label_widget);
 420     }
 421
 422   priv->label_widget = label_widget;
 423
 424   if (label_widget)
 425     {
 426       priv->label_widget = label_widget;
 427       gtk_widget_set_parent (label_widget, GTK_WIDGET (frame));
 428       need_resize |= gtk_widget_get_visible (label_widget);
 429     }
 430
 431   if (gtk_widget_get_visible (GTK_WIDGET (frame)) && need_resize)
 432     gtk_widget_queue_resize (GTK_WIDGET (frame));
 433
 434   g_object_freeze_notify (G_OBJECT (frame));
 435   g_object_notify (G_OBJECT (frame), "label-widget");
 436   g_object_notify (G_OBJECT (frame), "label");
 437   g_object_thaw_notify (G_OBJECT (frame));
 438 }
 439
 440 /**
 441  * gtk_frame_get_label_widget:
 442  * @frame: a #GtkFrame
 443  *
 444  * Retrieves the label widget for the frame. See
 445  * gtk_frame_set_label_widget().
 446  *
 447  * Return value: (transfer none): the label widget, or %NULL if there is none.
 448  **/
 449 GtkWidget *
 450 gtk_frame_get_label_widget (GtkFrame *frame)
 451 {
 452   g_return_val_if_fail (GTK_IS_FRAME (frame), NULL);
 453
 454   return frame->priv->label_widget;
 455 }
 456
 457 /**
 458  * gtk_frame_set_label_align:
 459  * @frame: a #GtkFrame
 460  * @xalign: The position of the label along the top edge
 461  *   of the widget. A value of 0.0 represents left alignment;
 462  *   1.0 represents right alignment.
 463  * @yalign: The y alignment of the label. A value of 0.0 aligns under
 464  *   the frame; 1.0 aligns above the frame. If the values are exactly
 465  *   0.0 or 1.0 the gap in the frame won't be painted because the label
 466  *   will be completely above or below the frame.
 467  *
 468  * Sets the alignment of the frame widget's label. The
 469  * default values for a newly created frame are 0.0 and 0.5.
 470  **/
 471 void
 472 gtk_frame_set_label_align (GtkFrame *frame,
 473                            gfloat    xalign,
 474                            gfloat    yalign)
 475 {
 476   GtkFramePrivate *priv;
 477
 478   g_return_if_fail (GTK_IS_FRAME (frame));
 479
 480   priv = frame->priv;
 481
 482   xalign = CLAMP (xalign, 0.0, 1.0);
 483   yalign = CLAMP (yalign, 0.0, 1.0);
 484
 485   g_object_freeze_notify (G_OBJECT (frame));
 486   if (xalign != priv->label_xalign)
 487     {
 488       priv->label_xalign = xalign;
 489       g_object_notify (G_OBJECT (frame), "label-xalign");
 490     }
 491
 492   if (yalign != priv->label_yalign)
 493     {
 494       priv->label_yalign = yalign;
 495       g_object_notify (G_OBJECT (frame), "label-yalign");
 496     }
 497
 498   g_object_thaw_notify (G_OBJECT (frame));
 499   gtk_widget_queue_resize (GTK_WIDGET (frame));
 500 }
 501
 502 /**
 503  * gtk_frame_get_label_align:
 504  * @frame: a #GtkFrame
 505  * @xalign: (allow-none): location to store X alignment of frame's label, or %NULL
 506  * @yalign: (allow-none): location to store X alignment of frame's label, or %NULL
 507  *
 508  * Retrieves the X and Y alignment of the frame's label. See
 509  * gtk_frame_set_label_align().
 510  **/
 511 void
 512 gtk_frame_get_label_align (GtkFrame *frame,
 513                            gfloat   *xalign,
 514                            gfloat   *yalign)
 515 {
 516   GtkFramePrivate *priv;
 517
 518   g_return_if_fail (GTK_IS_FRAME (frame));
 519
 520   priv = frame->priv;
 521
 522   if (xalign)
 523     *xalign = priv->label_xalign;
 524   if (yalign)
 525     *yalign = priv->label_yalign;
 526 }
 527
 528 /**
 529  * gtk_frame_set_shadow_type:
 530  * @frame: a #GtkFrame
 531  * @type: the new #GtkShadowType
 532  *
 533  * Sets the shadow type for @frame.
 534  **/
 535 void
 536 gtk_frame_set_shadow_type (GtkFrame      *frame,
 537                            GtkShadowType  type)
 538 {
 539   GtkFramePrivate *priv;
 540   GtkWidget *widget;
 541
 542   g_return_if_fail (GTK_IS_FRAME (frame));
 543
 544   priv = frame->priv;
 545
 546   if ((GtkShadowType) priv->shadow_type != type)
 547     {
 548       widget = GTK_WIDGET (frame);
 549       priv->shadow_type = type;
 550       g_object_notify (G_OBJECT (frame), "shadow-type");
 551
 552       if (gtk_widget_is_drawable (widget))
 553         {
 554           gtk_widget_queue_draw (widget);
 555         }
 556
 557       gtk_widget_queue_resize (widget);
 558     }
 559 }
 560
 561 /**
 562  * gtk_frame_get_shadow_type:
 563  * @frame: a #GtkFrame
 564  *
 565  * Retrieves the shadow type of the frame. See
 566  * gtk_frame_set_shadow_type().
 567  *
 568  * Return value: the current shadow type of the frame.
 569  **/
 570 GtkShadowType
 571 gtk_frame_get_shadow_type (GtkFrame *frame)
 572 {
 573   g_return_val_if_fail (GTK_IS_FRAME (frame), GTK_SHADOW_ETCHED_IN);
 574
 575   return frame->priv->shadow_type;
 576 }
 577
 578 static gboolean
 579 gtk_frame_draw (GtkWidget *widget,
 580                 cairo_t   *cr)
 581 {
 582   GtkFrame *frame;
 583   GtkFramePrivate *priv;
 584   GtkStateType state;
 585   GtkStyle *style;
 586   gint x, y, width, height;
 587   GtkAllocation allocation;
 588
 589   frame = GTK_FRAME (widget);
 590   priv = frame->priv;
 591
 592   style = gtk_widget_get_style (widget);
 593   state = gtk_widget_get_state (widget);
 594   gtk_widget_get_allocation (widget, &allocation);
 595
 596   x = priv->child_allocation.x - allocation.x - style->xthickness;
 597   y = priv->child_allocation.y - allocation.y - style->ythickness;
 598   width = priv->child_allocation.width + 2 * style->xthickness;
 599   height =  priv->child_allocation.height + 2 * style->ythickness;
 600
 601   if (priv->label_widget)
 602     {
 603       gfloat xalign;
 604       gint height_extra;
 605       gint x2;
 606
 607       if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
 608         xalign = priv->label_xalign;
 609       else
 610         xalign = 1 - priv->label_xalign;
 611
 612       height_extra = MAX (0, priv->label_allocation.height - style->ythickness)
 613                      - priv->label_yalign * priv->label_allocation.height;
 614       y -= height_extra;
 615       height += height_extra;
 616
 617       x2 = style->xthickness + (priv->child_allocation.width - priv->label_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_SIDE_PAD;
 618       /* If the label is completely over or under the frame we can omit the gap */
 619       if (priv->label_yalign == 0.0 || priv->label_yalign == 1.0)
 620         gtk_paint_shadow (style, cr,
 621                           state, priv->shadow_type,
 622                           widget, "frame",
 623                           x, y, width, height);
 624       else
 625         gtk_paint_shadow_gap (style, cr,
 626                               state, priv->shadow_type,
 627                               widget, "frame",
 628                               x, y, width, height,
 629                               GTK_POS_TOP,
 630                               x2, priv->label_allocation.width + 2 * LABEL_PAD);
 631     }
 632    else
 633      gtk_paint_shadow (style, cr,
 634                        state, priv->shadow_type,
 635                        widget, "frame",
 636                        x, y, width, height);
 637
 638   GTK_WIDGET_CLASS (gtk_frame_parent_class)->draw (widget, cr);
 639
 640   return FALSE;
 641 }
 642
 643 static void
 644 gtk_frame_size_allocate (GtkWidget     *widget,
 645                          GtkAllocation *allocation)
 646 {
 647   GtkFrame *frame = GTK_FRAME (widget);
 648   GtkFramePrivate *priv = frame->priv;
 649   GtkBin *bin = GTK_BIN (widget);
 650   GtkAllocation new_allocation;
 651   GtkWidget *child;
 652
 653   gtk_widget_set_allocation (widget, allocation);
 654
 655   gtk_frame_compute_child_allocation (frame, &new_allocation);
 656
 657   /* If the child allocation changed, that means that the frame is drawn
 658    * in a new place, so we must redraw the entire widget.
 659    */
 660   if (gtk_widget_get_mapped (widget))
 661     {
 662       gdk_window_invalidate_rect (gtk_widget_get_window (widget), allocation, FALSE);
 663     }
 664
 665   child = gtk_bin_get_child (bin);
 666   if (child && gtk_widget_get_visible (child))
 667     gtk_widget_size_allocate (child, &new_allocation);
 668
 669   priv->child_allocation = new_allocation;
 670
 671   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 672     {
 673       GtkStyle *style;
 674       gint nat_width, width, height;
 675       gfloat xalign;
 676
 677       style = gtk_widget_get_style (widget);
 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       gtk_size_request_get_width (GTK_SIZE_REQUEST (priv->label_widget), NULL, &nat_width);
 685       width = new_allocation.width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD;
 686       width = MIN (width, nat_width);
 687
 688       gtk_size_request_get_height_for_width (GTK_SIZE_REQUEST (priv->label_widget), width,
 689                                              &height, NULL);
 690
 691
 692       priv->label_allocation.x = priv->child_allocation.x + LABEL_SIDE_PAD +
 693         (new_allocation.width - width - 2 * LABEL_PAD - 2 * LABEL_SIDE_PAD) * xalign + LABEL_PAD;
 694
 695       priv->label_allocation.width = width;
 696
 697       priv->label_allocation.y = priv->child_allocation.y - MAX (height, style->ythickness);
 698       priv->label_allocation.height = height;
 699
 700       gtk_widget_size_allocate (priv->label_widget, &priv->label_allocation);
 701     }
 702 }
 703
 704 static void
 705 gtk_frame_compute_child_allocation (GtkFrame      *frame,
 706                                     GtkAllocation *child_allocation)
 707 {
 708   g_return_if_fail (GTK_IS_FRAME (frame));
 709   g_return_if_fail (child_allocation != NULL);
 710
 711   GTK_FRAME_GET_CLASS (frame)->compute_child_allocation (frame, child_allocation);
 712 }
 713
 714 static void
 715 gtk_frame_real_compute_child_allocation (GtkFrame      *frame,
 716                                          GtkAllocation *child_allocation)
 717 {
 718   GtkFramePrivate *priv = frame->priv;
 719   GtkWidget *widget = GTK_WIDGET (frame);
 720   GtkAllocation allocation;
 721   GtkStyle *style;
 722   gint top_margin;
 723   guint border_width;
 724
 725   style = gtk_widget_get_style (widget);
 726
 727   gtk_widget_get_allocation (widget, &allocation);
 728
 729   border_width = gtk_container_get_border_width (GTK_CONTAINER (frame));
 730
 731   if (priv->label_widget)
 732     {
 733       gint nat_width, width, height;
 734
 735       gtk_size_request_get_width (GTK_SIZE_REQUEST (priv->label_widget), NULL, &nat_width);
 736
 737       width = allocation.width;
 738       width -= 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 739       width -= (border_width + style->xthickness) * 2;
 740
 741       width = MIN (width, nat_width);
 742
 743       gtk_size_request_get_height_for_width (GTK_SIZE_REQUEST (priv->label_widget), width,
 744                                              &height, NULL);
 745
 746       top_margin = MAX (height, style->ythickness);
 747     }
 748   else
 749     top_margin = style->ythickness;
 750
 751   child_allocation->x = border_width + style->xthickness;
 752   child_allocation->y = border_width + top_margin;
 753   child_allocation->width = MAX (1, (gint) allocation.width - child_allocation->x * 2);
 754   child_allocation->height = MAX (1, ((gint) allocation.height - child_allocation->y -
 755                                       border_width - (gint) style->ythickness));
 756
 757   child_allocation->x += allocation.x;
 758   child_allocation->y += allocation.y;
 759 }
 760
 761 static void
 762 gtk_frame_get_size (GtkSizeRequest *request,
 763                     GtkOrientation  orientation,
 764                     gint           *minimum_size,
 765                     gint           *natural_size)
 766 {
 767   GtkFrame *frame = GTK_FRAME (request);
 768   GtkFramePrivate *priv = frame->priv;
 769   GtkStyle *style;
 770   GtkWidget *widget = GTK_WIDGET (request);
 771   GtkWidget *child;
 772   GtkBin *bin = GTK_BIN (widget);
 773   gint child_min, child_nat;
 774   gint minimum, natural;
 775   guint border_width;
 776
 777   style = gtk_widget_get_style (widget);
 778
 779   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 780     {
 781       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 782         {
 783           gtk_size_request_get_width (GTK_SIZE_REQUEST (priv->label_widget),
 784                                       &child_min, &child_nat);
 785           minimum = child_min + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 786           natural = child_nat + 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 787         }
 788       else
 789         {
 790           gtk_size_request_get_height (GTK_SIZE_REQUEST (priv->label_widget),
 791                                        &child_min, &child_nat);
 792           minimum = MAX (0, child_min - style->ythickness);
 793           natural = MAX (0, child_nat - style->ythickness);
 794         }
 795     }
 796   else
 797     {
 798       minimum = 0;
 799       natural = 0;
 800     }
 801
 802   child = gtk_bin_get_child (bin);
 803   if (child && gtk_widget_get_visible (child))
 804     {
 805       if (orientation == GTK_ORIENTATION_HORIZONTAL)
 806         {
 807           gtk_size_request_get_width (GTK_SIZE_REQUEST (child),
 808                                       &child_min, &child_nat);
 809           minimum = MAX (minimum, child_min);
 810           natural = MAX (natural, child_nat);
 811         }
 812       else
 813         {
 814           gtk_size_request_get_height (GTK_SIZE_REQUEST (child),
 815                                        &child_min, &child_nat);
 816           minimum += child_min;
 817           natural += child_nat;
 818         }
 819     }
 820
 821   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 822
 823   if (orientation == GTK_ORIENTATION_HORIZONTAL)
 824     {
 825       minimum += (border_width + style->xthickness) * 2;
 826       natural += (border_width + style->xthickness) * 2;
 827     }
 828   else
 829     {
 830       minimum += (border_width + style->ythickness) * 2;
 831       natural += (border_width + style->ythickness) * 2;
 832     }
 833
 834  if (minimum_size)
 835     *minimum_size = minimum;
 836
 837   if (natural_size)
 838     *natural_size = natural;
 839 }
 840
 841 static void
 842 gtk_frame_get_width (GtkSizeRequest *widget,
 843                      gint           *minimum_size,
 844                      gint           *natural_size)
 845 {
 846   gtk_frame_get_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
 847 }
 848
 849 static void
 850 gtk_frame_get_height (GtkSizeRequest *widget,
 851                       gint           *minimum_size,
 852                       gint           *natural_size)
 853 {
 854   gtk_frame_get_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
 855 }
 856
 857
 858 static void
 859 gtk_frame_get_height_for_width (GtkSizeRequest *request,
 860                                 gint            width,
 861                                 gint           *minimum_height,
 862                                 gint           *natural_height)
 863 {
 864   GtkWidget *widget = GTK_WIDGET (request);
 865   GtkWidget *child;
 866   GtkFrame *frame = GTK_FRAME (widget);
 867   GtkFramePrivate *priv = frame->priv;
 868   GtkBin *bin = GTK_BIN (widget);
 869   GtkStyle *style;
 870   gint child_min, child_nat, label_width;
 871   gint minimum, natural;
 872   guint border_width;
 873
 874   style = gtk_widget_get_style (widget);
 875
 876   border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
 877   minimum      = (border_width + style->ythickness) * 2;
 878   natural      = (border_width + style->ythickness) * 2;
 879
 880   width -= (border_width + style->xthickness) * 2;
 881   label_width = width - 2 * LABEL_PAD + 2 * LABEL_SIDE_PAD;
 882
 883   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 884     {
 885       gtk_size_request_get_height_for_width (GTK_SIZE_REQUEST (priv->label_widget),
 886                                              label_width, &child_min, &child_nat);
 887       minimum += child_min;
 888       natural += child_nat;
 889     }
 890
 891   child = gtk_bin_get_child (bin);
 892   if (child && gtk_widget_get_visible (child))
 893     {
 894       gtk_size_request_get_height_for_width (GTK_SIZE_REQUEST (child),
 895                                              width, &child_min, &child_nat);
 896       minimum += child_min;
 897       natural += child_nat;
 898     }
 899
 900  if (minimum_height)
 901     *minimum_height = minimum;
 902
 903   if (natural_height)
 904     *natural_height = natural;
 905 }
 906
 907 static void
 908 gtk_frame_get_width_for_height (GtkSizeRequest *widget,
 909                                 gint       height,
 910                                 gint      *minimum_width,
 911                                 gint      *natural_width)
 912 {
 913   GTK_SIZE_REQUEST_GET_IFACE (widget)->get_width (widget, minimum_width, natural_width);
 914 }
 915
 916 static void
 917 gtk_frame_size_request_init (GtkSizeRequestIface *iface)
 918 {
 919   iface->get_width            = gtk_frame_get_width;
 920   iface->get_height           = gtk_frame_get_height;
 921   iface->get_height_for_width = gtk_frame_get_height_for_width;
 922   iface->get_width_for_height = gtk_frame_get_width_for_height;
 923 }