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

   1 /* GTK - The GIMP Toolkit
   2  *
   3  * Copyright (C) 2003 Sun Microsystems, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Authors:
  21  *      Mark McLoughlin <mark@skynet.ie>
  22  */
  23
  24 #include <config.h>
  25
  26 #include "gtkexpander.h"
  27
  28 #include "gtklabel.h"
  29 #include "gtkcontainer.h"
  30 #include "gtkmarshalers.h"
  31 #include "gtkmain.h"
  32 #include "gtkintl.h"
  33 #include "gtkprivate.h"
  34 #include <gdk/gdkkeysyms.h>
  35 #include "gtkalias.h"
  36 #include "gtkdnd.h"
  37
  38 #define GTK_EXPANDER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_EXPANDER, GtkExpanderPrivate))
  39
  40 #define DEFAULT_EXPANDER_SIZE 10
  41 #define DEFAULT_EXPANDER_SPACING 2
  42
  43 enum
  44 {
  45   PROP_0,
  46   PROP_EXPANDED,
  47   PROP_LABEL,
  48   PROP_USE_UNDERLINE,
  49   PROP_USE_MARKUP,
  50   PROP_SPACING,
  51   PROP_LABEL_WIDGET
  52 };
  53
  54 struct _GtkExpanderPrivate
  55 {
  56   GtkWidget        *label_widget;
  57   GdkWindow        *event_window;
  58   gint              spacing;
  59
  60   GtkExpanderStyle  expander_style;
  61   guint             animation_timeout;
  62   guint             expand_timer;
  63
  64   guint             expanded : 1;
  65   guint             use_underline : 1;
  66   guint             use_markup : 1;
  67   guint             button_down : 1;
  68   guint             prelight : 1;
  69 };
  70
  71 static void gtk_expander_class_init (GtkExpanderClass *klass);
  72 static void gtk_expander_init       (GtkExpander      *expander);
  73
  74 static void gtk_expander_set_property (GObject          *object,
  75                                        guint             prop_id,
  76                                        const GValue     *value,
  77                                        GParamSpec       *pspec);
  78 static void gtk_expander_get_property (GObject          *object,
  79                                        guint             prop_id,
  80                                        GValue           *value,
  81                                        GParamSpec       *pspec);
  82
  83 static void gtk_expander_destroy (GtkObject *object);
  84
  85 static void     gtk_expander_realize        (GtkWidget        *widget);
  86 static void     gtk_expander_unrealize      (GtkWidget        *widget);
  87 static void     gtk_expander_size_request   (GtkWidget        *widget,
  88                                              GtkRequisition   *requisition);
  89 static void     gtk_expander_size_allocate  (GtkWidget        *widget,
  90                                              GtkAllocation    *allocation);
  91 static void     gtk_expander_map            (GtkWidget        *widget);
  92 static void     gtk_expander_unmap          (GtkWidget        *widget);
  93 static gboolean gtk_expander_expose         (GtkWidget        *widget,
  94                                              GdkEventExpose   *event);
  95 static gboolean gtk_expander_button_press   (GtkWidget        *widget,
  96                                              GdkEventButton   *event);
  97 static gboolean gtk_expander_button_release (GtkWidget        *widget,
  98                                              GdkEventButton   *event);
  99 static gboolean gtk_expander_enter_notify   (GtkWidget        *widget,
 100                                              GdkEventCrossing *event);
 101 static gboolean gtk_expander_leave_notify   (GtkWidget        *widget,
 102                                              GdkEventCrossing *event);
 103 static gboolean gtk_expander_focus          (GtkWidget        *widget,
 104                                              GtkDirectionType  direction);
 105 static void     gtk_expander_grab_notify    (GtkWidget        *widget,
 106                                              gboolean          was_grabbed);
 107 static void     gtk_expander_state_changed  (GtkWidget        *widget,
 108                                              GtkStateType      previous_state);
 109 static gboolean gtk_expander_drag_motion    (GtkWidget        *widget,
 110                                              GdkDragContext   *context,
 111                                              gint              x,
 112                                              gint              y,
 113                                              guint             time);
 114 static void     gtk_expander_drag_leave     (GtkWidget        *widget,
 115                                              GdkDragContext   *context,
 116                                              guint             time);
 117
 118 static void gtk_expander_add    (GtkContainer *container,
 119                                  GtkWidget    *widget);
 120 static void gtk_expander_remove (GtkContainer *container,
 121                                  GtkWidget    *widget);
 122 static void gtk_expander_forall (GtkContainer *container,
 123                                  gboolean        include_internals,
 124                                  GtkCallback     callback,
 125                                  gpointer        callback_data);
 126
 127 static void gtk_expander_activate (GtkExpander *expander);
 128
 129 static void get_expander_bounds (GtkExpander  *expander,
 130                                  GdkRectangle *rect);
 131
 132 static GtkBinClass *parent_class = NULL;
 133
 134 GType
 135 gtk_expander_get_type (void)
 136 {
 137   static GType expander_type = 0;
 138
 139   if (!expander_type)
 140     {
 141       static const GTypeInfo expander_info =
 142       {
 143         sizeof (GtkExpanderClass),
 144         NULL,           /* base_init */
 145         NULL,           /* base_finalize */
 146         (GClassInitFunc) gtk_expander_class_init,
 147         NULL,           /* class_finalize */
 148         NULL,           /* class_data */
 149         sizeof (GtkExpander),
 150         0,              /* n_preallocs */
 151         (GInstanceInitFunc) gtk_expander_init,
 152       };
 153
 154       expander_type = g_type_register_static (GTK_TYPE_BIN,
 155                                               I_("GtkExpander"),
 156                                               &expander_info, 0);
 157     }
 158
 159   return expander_type;
 160 }
 161
 162 static void
 163 gtk_expander_class_init (GtkExpanderClass *klass)
 164 {
 165   GObjectClass *gobject_class;
 166   GtkObjectClass *object_class;
 167   GtkWidgetClass *widget_class;
 168   GtkContainerClass *container_class;
 169
 170   parent_class = g_type_class_peek_parent (klass);
 171
 172   gobject_class   = (GObjectClass *) klass;
 173   object_class    = (GtkObjectClass *) klass;
 174   widget_class    = (GtkWidgetClass *) klass;
 175   container_class = (GtkContainerClass *) klass;
 176
 177   gobject_class->set_property = gtk_expander_set_property;
 178   gobject_class->get_property = gtk_expander_get_property;
 179
 180   object_class->destroy = gtk_expander_destroy;
 181
 182   widget_class->realize              = gtk_expander_realize;
 183   widget_class->unrealize            = gtk_expander_unrealize;
 184   widget_class->size_request         = gtk_expander_size_request;
 185   widget_class->size_allocate        = gtk_expander_size_allocate;
 186   widget_class->map                  = gtk_expander_map;
 187   widget_class->unmap                = gtk_expander_unmap;
 188   widget_class->expose_event         = gtk_expander_expose;
 189   widget_class->button_press_event   = gtk_expander_button_press;
 190   widget_class->button_release_event = gtk_expander_button_release;
 191   widget_class->enter_notify_event   = gtk_expander_enter_notify;
 192   widget_class->leave_notify_event   = gtk_expander_leave_notify;
 193   widget_class->focus                = gtk_expander_focus;
 194   widget_class->grab_notify          = gtk_expander_grab_notify;
 195   widget_class->state_changed        = gtk_expander_state_changed;
 196   widget_class->drag_motion          = gtk_expander_drag_motion;
 197   widget_class->drag_leave           = gtk_expander_drag_leave;
 198
 199   container_class->add    = gtk_expander_add;
 200   container_class->remove = gtk_expander_remove;
 201   container_class->forall = gtk_expander_forall;
 202
 203   klass->activate = gtk_expander_activate;
 204
 205   g_type_class_add_private (klass, sizeof (GtkExpanderPrivate));
 206
 207   g_object_class_install_property (gobject_class,
 208                                    PROP_EXPANDED,
 209                                    g_param_spec_boolean ("expanded",
 210                                                          P_("Expanded"),
 211                                                          P_("Whether the expander has been opened to reveal the child widget"),
 212                                                          FALSE,
 213                                                          GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 214
 215   g_object_class_install_property (gobject_class,
 216                                    PROP_LABEL,
 217                                    g_param_spec_string ("label",
 218                                                         P_("Label"),
 219                                                         P_("Text of the expander's label"),
 220                                                         NULL,
 221                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 222
 223   g_object_class_install_property (gobject_class,
 224                                    PROP_USE_UNDERLINE,
 225                                    g_param_spec_boolean ("use-underline",
 226                                                          P_("Use underline"),
 227                                                          P_("If set, an underline in the text indicates the next character should be used for the mnemonic accelerator key"),
 228                                                          FALSE,
 229                                                          GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 230
 231   g_object_class_install_property (gobject_class,
 232                                    PROP_USE_MARKUP,
 233                                    g_param_spec_boolean ("use-markup",
 234                                                          P_("Use markup"),
 235                                                          P_("The text of the label includes XML markup. See pango_parse_markup()"),
 236                                                          FALSE,
 237                                                          GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 238
 239   g_object_class_install_property (gobject_class,
 240                                    PROP_SPACING,
 241                                    g_param_spec_int ("spacing",
 242                                                      P_("Spacing"),
 243                                                      P_("Space to put between the label and the child"),
 244                                                      0,
 245                                                      G_MAXINT,
 246                                                      0,
 247                                                      GTK_PARAM_READWRITE));
 248
 249   g_object_class_install_property (gobject_class,
 250                                    PROP_LABEL_WIDGET,
 251                                    g_param_spec_object ("label-widget",
 252                                                         P_("Label widget"),
 253                                                         P_("A widget to display in place of the usual expander label"),
 254                                                         GTK_TYPE_WIDGET,
 255                                                         GTK_PARAM_READWRITE));
 256
 257   gtk_widget_class_install_style_property (widget_class,
 258                                            g_param_spec_int ("expander-size",
 259                                                              P_("Expander Size"),
 260                                                              P_("Size of the expander arrow"),
 261                                                              0,
 262                                                              G_MAXINT,
 263                                                              DEFAULT_EXPANDER_SIZE,
 264                                                              GTK_PARAM_READABLE));
 265
 266   gtk_widget_class_install_style_property (widget_class,
 267                                            g_param_spec_int ("expander-spacing",
 268                                                              P_("Indicator Spacing"),
 269                                                              P_("Spacing around expander arrow"),
 270                                                              0,
 271                                                              G_MAXINT,
 272                                                              DEFAULT_EXPANDER_SPACING,
 273                                                              GTK_PARAM_READABLE));
 274
 275   widget_class->activate_signal =
 276     g_signal_new (I_("activate"),
 277                   G_TYPE_FROM_CLASS (gobject_class),
 278                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 279                   G_STRUCT_OFFSET (GtkExpanderClass, activate),
 280                   NULL, NULL,
 281                   _gtk_marshal_VOID__VOID,
 282                   G_TYPE_NONE, 0);
 283 }
 284
 285 static void
 286 gtk_expander_init (GtkExpander *expander)
 287 {
 288   GtkExpanderPrivate *priv;
 289
 290   expander->priv = priv = GTK_EXPANDER_GET_PRIVATE (expander);
 291
 292   GTK_WIDGET_SET_FLAGS (expander, GTK_CAN_FOCUS);
 293   GTK_WIDGET_SET_FLAGS (expander, GTK_NO_WINDOW);
 294
 295   priv->label_widget = NULL;
 296   priv->event_window = NULL;
 297   priv->spacing = 0;
 298
 299   priv->expander_style = GTK_EXPANDER_COLLAPSED;
 300   priv->animation_timeout = 0;
 301
 302   priv->expanded = FALSE;
 303   priv->use_underline = FALSE;
 304   priv->use_markup = FALSE;
 305   priv->button_down = FALSE;
 306   priv->prelight = FALSE;
 307   priv->expand_timer = 0;
 308
 309   gtk_drag_dest_set (GTK_WIDGET (expander), 0, NULL, 0, 0);
 310   gtk_drag_dest_set_track_motion (GTK_WIDGET (expander), TRUE);
 311 }
 312
 313 static void
 314 gtk_expander_set_property (GObject      *object,
 315                            guint         prop_id,
 316                            const GValue *value,
 317                            GParamSpec   *pspec)
 318 {
 319   GtkExpander *expander = GTK_EXPANDER (object);
 320
 321   switch (prop_id)
 322     {
 323     case PROP_EXPANDED:
 324       gtk_expander_set_expanded (expander, g_value_get_boolean (value));
 325       break;
 326     case PROP_LABEL:
 327       gtk_expander_set_label (expander, g_value_get_string (value));
 328       break;
 329     case PROP_USE_UNDERLINE:
 330       gtk_expander_set_use_underline (expander, g_value_get_boolean (value));
 331       break;
 332     case PROP_USE_MARKUP:
 333       gtk_expander_set_use_markup (expander, g_value_get_boolean (value));
 334       break;
 335     case PROP_SPACING:
 336       gtk_expander_set_spacing (expander, g_value_get_int (value));
 337       break;
 338     case PROP_LABEL_WIDGET:
 339       gtk_expander_set_label_widget (expander, g_value_get_object (value));
 340       break;
 341     default:
 342       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 343       break;
 344     }
 345 }
 346
 347 static void
 348 gtk_expander_get_property (GObject    *object,
 349                            guint       prop_id,
 350                            GValue     *value,
 351                            GParamSpec *pspec)
 352 {
 353   GtkExpander *expander = GTK_EXPANDER (object);
 354   GtkExpanderPrivate *priv = expander->priv;
 355
 356   switch (prop_id)
 357     {
 358     case PROP_EXPANDED:
 359       g_value_set_boolean (value, priv->expanded);
 360       break;
 361     case PROP_LABEL:
 362       g_value_set_string (value, gtk_expander_get_label (expander));
 363       break;
 364     case PROP_USE_UNDERLINE:
 365       g_value_set_boolean (value, priv->use_underline);
 366       break;
 367     case PROP_USE_MARKUP:
 368       g_value_set_boolean (value, priv->use_markup);
 369       break;
 370     case PROP_SPACING:
 371       g_value_set_int (value, priv->spacing);
 372       break;
 373     case PROP_LABEL_WIDGET:
 374       g_value_set_object (value,
 375                           priv->label_widget ?
 376                           G_OBJECT (priv->label_widget) : NULL);
 377       break;
 378     default:
 379       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 380       break;
 381     }
 382 }
 383
 384 static void
 385 gtk_expander_destroy (GtkObject *object)
 386 {
 387   GtkExpanderPrivate *priv = GTK_EXPANDER (object)->priv;
 388
 389   if (priv->animation_timeout)
 390     {
 391       g_source_remove (priv->animation_timeout);
 392       priv->animation_timeout = 0;
 393     }
 394
 395   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 396 }
 397
 398 static void
 399 gtk_expander_realize (GtkWidget *widget)
 400 {
 401   GtkExpanderPrivate *priv;
 402   GdkWindowAttr attributes;
 403   gint attributes_mask;
 404   gint border_width;
 405   GdkRectangle expander_rect;
 406
 407   priv = GTK_EXPANDER (widget)->priv;
 408   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 409
 410   border_width = GTK_CONTAINER (widget)->border_width;
 411
 412   get_expander_bounds (GTK_EXPANDER (widget), &expander_rect);
 413
 414   attributes.window_type = GDK_WINDOW_CHILD;
 415   attributes.x = widget->allocation.x + border_width;
 416   attributes.y = expander_rect.y;
 417   attributes.width = MAX (widget->allocation.width - 2 * border_width, 1);
 418   attributes.height = expander_rect.width;
 419   attributes.wclass = GDK_INPUT_ONLY;
 420   attributes.event_mask = gtk_widget_get_events (widget)     |
 421                                 GDK_BUTTON_PRESS_MASK        |
 422                                 GDK_BUTTON_RELEASE_MASK      |
 423                                 GDK_ENTER_NOTIFY_MASK        |
 424                                 GDK_LEAVE_NOTIFY_MASK;
 425
 426   attributes_mask = GDK_WA_X | GDK_WA_Y;
 427
 428   widget->window = gtk_widget_get_parent_window (widget);
 429   g_object_ref (widget->window);
 430
 431   priv->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 432                                        &attributes, attributes_mask);
 433   gdk_window_set_user_data (priv->event_window, widget);
 434
 435   widget->style = gtk_style_attach (widget->style, widget->window);
 436   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 437 }
 438
 439 static void
 440 gtk_expander_unrealize (GtkWidget *widget)
 441 {
 442   GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
 443
 444   if (priv->event_window)
 445     {
 446       gdk_window_set_user_data (priv->event_window, NULL);
 447       gdk_window_destroy (priv->event_window);
 448       priv->event_window = NULL;
 449     }
 450
 451   GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
 452 }
 453
 454 static void
 455 gtk_expander_size_request (GtkWidget      *widget,
 456                            GtkRequisition *requisition)
 457 {
 458   GtkExpander *expander;
 459   GtkBin *bin;
 460   GtkExpanderPrivate *priv;
 461   gint border_width;
 462   gint expander_size;
 463   gint expander_spacing;
 464   gboolean interior_focus;
 465   gint focus_width;
 466   gint focus_pad;
 467
 468   bin = GTK_BIN (widget);
 469   expander = GTK_EXPANDER (widget);
 470   priv = expander->priv;
 471
 472   border_width = GTK_CONTAINER (widget)->border_width;
 473
 474   gtk_widget_style_get (widget,
 475                         "interior-focus", &interior_focus,
 476                         "focus-line-width", &focus_width,
 477                         "focus-padding", &focus_pad,
 478                         "expander-size", &expander_size,
 479                         "expander-spacing", &expander_spacing,
 480                         NULL);
 481
 482   requisition->width = expander_size + 2 * expander_spacing +
 483                        2 * focus_width + 2 * focus_pad;
 484   requisition->height = interior_focus ? (2 * focus_width + 2 * focus_pad) : 0;
 485
 486   if (priv->label_widget && GTK_WIDGET_VISIBLE (priv->label_widget))
 487     {
 488       GtkRequisition label_requisition;
 489
 490       gtk_widget_size_request (priv->label_widget, &label_requisition);
 491
 492       requisition->width  += label_requisition.width;
 493       requisition->height += label_requisition.height;
 494     }
 495
 496   requisition->height = MAX (expander_size + 2 * expander_spacing, requisition->height);
 497
 498   if (!interior_focus)
 499     requisition->height += 2 * focus_width + 2 * focus_pad;
 500
 501   if (bin->child && GTK_WIDGET_CHILD_VISIBLE (bin->child))
 502     {
 503       GtkRequisition child_requisition;
 504
 505       gtk_widget_size_request (bin->child, &child_requisition);
 506
 507       requisition->width = MAX (requisition->width, child_requisition.width);
 508       requisition->height += child_requisition.height + priv->spacing;
 509     }
 510
 511   requisition->width  += 2 * border_width;
 512   requisition->height += 2 * border_width;
 513 }
 514
 515 static void
 516 get_expander_bounds (GtkExpander  *expander,
 517                      GdkRectangle *rect)
 518 {
 519   GtkWidget *widget;
 520   GtkExpanderPrivate *priv;
 521   gint border_width;
 522   gint expander_size;
 523   gint expander_spacing;
 524   gboolean interior_focus;
 525   gint focus_width;
 526   gint focus_pad;
 527   gboolean ltr;
 528
 529   widget = GTK_WIDGET (expander);
 530   priv = expander->priv;
 531
 532   border_width = GTK_CONTAINER (expander)->border_width;
 533
 534   gtk_widget_style_get (widget,
 535                         "interior-focus", &interior_focus,
 536                         "focus-line-width", &focus_width,
 537                         "focus-padding", &focus_pad,
 538                         "expander-size", &expander_size,
 539                         "expander-spacing", &expander_spacing,
 540                         NULL);
 541
 542   ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
 543
 544   rect->x = widget->allocation.x + border_width;
 545   rect->y = widget->allocation.y + border_width;
 546
 547   if (ltr)
 548     rect->x += expander_spacing;
 549   else
 550     rect->x += widget->allocation.width - 2 * border_width -
 551                expander_spacing - expander_size;
 552
 553   if (priv->label_widget && GTK_WIDGET_VISIBLE (priv->label_widget))
 554     {
 555       GtkAllocation label_allocation;
 556
 557       label_allocation = priv->label_widget->allocation;
 558
 559       if (expander_size < label_allocation.height)
 560         rect->y += focus_width + focus_pad + (label_allocation.height - expander_size) / 2;
 561       else
 562         rect->y += expander_spacing;
 563     }
 564   else
 565     {
 566       rect->y += expander_spacing;
 567     }
 568
 569   if (!interior_focus)
 570     {
 571       if (ltr)
 572         rect->x += focus_width + focus_pad;
 573       else
 574         rect->x -= focus_width + focus_pad;
 575       rect->y += focus_width + focus_pad;
 576     }
 577
 578   rect->width = rect->height = expander_size;
 579 }
 580
 581 static void
 582 gtk_expander_size_allocate (GtkWidget     *widget,
 583                             GtkAllocation *allocation)
 584 {
 585   GtkExpander *expander;
 586   GtkBin *bin;
 587   GtkExpanderPrivate *priv;
 588   GtkRequisition child_requisition;
 589   gboolean child_visible = FALSE;
 590   gint border_width;
 591   gint expander_size;
 592   gint expander_spacing;
 593   gboolean interior_focus;
 594   gint focus_width;
 595   gint focus_pad;
 596   gint label_height;
 597
 598   expander = GTK_EXPANDER (widget);
 599   bin = GTK_BIN (widget);
 600   priv = expander->priv;
 601
 602   border_width = GTK_CONTAINER (widget)->border_width;
 603
 604   gtk_widget_style_get (widget,
 605                         "interior-focus", &interior_focus,
 606                         "focus-line-width", &focus_width,
 607                         "focus-padding", &focus_pad,
 608                         "expander-size", &expander_size,
 609                         "expander-spacing", &expander_spacing,
 610                         NULL);
 611
 612   child_requisition.width = 0;
 613   child_requisition.height = 0;
 614   if (bin->child && GTK_WIDGET_CHILD_VISIBLE (bin->child))
 615     {
 616       child_visible = TRUE;
 617       gtk_widget_get_child_requisition (bin->child, &child_requisition);
 618     }
 619
 620   widget->allocation = *allocation;
 621
 622   if (priv->label_widget && GTK_WIDGET_VISIBLE (priv->label_widget))
 623     {
 624       GtkAllocation label_allocation;
 625       GtkRequisition label_requisition;
 626       gboolean ltr;
 627
 628       gtk_widget_get_child_requisition (priv->label_widget, &label_requisition);
 629
 630       ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
 631
 632       if (ltr)
 633         label_allocation.x = (widget->allocation.x +
 634                               border_width + focus_width + focus_pad +
 635                               expander_size + 2 * expander_spacing);
 636       else
 637         label_allocation.x = (widget->allocation.x + widget->allocation.width -
 638                               (label_requisition.width +
 639                                border_width + focus_width + focus_pad +
 640                                expander_size + 2 * expander_spacing));
 641
 642       label_allocation.y = widget->allocation.y + border_width + focus_width + focus_pad;
 643
 644       label_allocation.width = MIN (label_requisition.width,
 645                                     allocation->width - 2 * border_width -
 646                                     expander_size - 2 * expander_spacing -
 647                                     2 * focus_width - 2 * focus_pad);
 648       label_allocation.width = MAX (label_allocation.width, 1);
 649
 650       label_allocation.height = MIN (label_requisition.height,
 651                                      allocation->height - 2 * border_width -
 652                                      2 * focus_width - 2 * focus_pad -
 653                                      (child_visible ? priv->spacing : 0));
 654       label_allocation.height = MAX (label_allocation.height, 1);
 655
 656       gtk_widget_size_allocate (priv->label_widget, &label_allocation);
 657
 658       label_height = label_allocation.height;
 659     }
 660   else
 661     {
 662       label_height = 0;
 663     }
 664
 665   if (GTK_WIDGET_REALIZED (widget))
 666     {
 667       GdkRectangle rect;
 668
 669       get_expander_bounds (expander, &rect);
 670
 671       gdk_window_move_resize (priv->event_window,
 672                               allocation->x + border_width, rect.y,
 673                               MAX (allocation->width - 2 * border_width, 1), rect.width);
 674     }
 675
 676   if (child_visible)
 677     {
 678       GtkAllocation child_allocation;
 679       gint top_height;
 680
 681       top_height = MAX (2 * expander_spacing + expander_size,
 682                         label_height +
 683                         (interior_focus ? 2 * focus_width + 2 * focus_pad : 0));
 684
 685       child_allocation.x = widget->allocation.x + border_width;
 686       child_allocation.y = widget->allocation.y + border_width + top_height + priv->spacing;
 687
 688       if (!interior_focus)
 689         child_allocation.y += 2 * focus_width + 2 * focus_pad;
 690
 691       child_allocation.width = MAX (allocation->width - 2 * border_width, 1);
 692
 693       child_allocation.height = allocation->height - top_height -
 694                                 2 * border_width - priv->spacing -
 695                                 (!interior_focus ? 2 * focus_width + 2 * focus_pad : 0);
 696       child_allocation.height = MAX (child_allocation.height, 1);
 697
 698       gtk_widget_size_allocate (bin->child, &child_allocation);
 699     }
 700 }
 701
 702 static void
 703 gtk_expander_map (GtkWidget *widget)
 704 {
 705   GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
 706
 707   if (priv->label_widget)
 708     gtk_widget_map (priv->label_widget);
 709
 710   GTK_WIDGET_CLASS (parent_class)->map (widget);
 711
 712   if (priv->event_window)
 713     gdk_window_show (priv->event_window);
 714 }
 715
 716 static void
 717 gtk_expander_unmap (GtkWidget *widget)
 718 {
 719   GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
 720
 721   if (priv->event_window)
 722     gdk_window_hide (priv->event_window);
 723
 724   GTK_WIDGET_CLASS (parent_class)->unmap (widget);
 725
 726   if (priv->label_widget)
 727     gtk_widget_unmap (priv->label_widget);
 728 }
 729
 730 static void
 731 gtk_expander_paint_prelight (GtkExpander *expander)
 732 {
 733   GtkWidget *widget;
 734   GtkContainer *container;
 735   GtkExpanderPrivate *priv;
 736   GdkRectangle area;
 737   gboolean interior_focus;
 738   int focus_width;
 739   int focus_pad;
 740   int expander_size;
 741   int expander_spacing;
 742
 743   priv = expander->priv;
 744   widget = GTK_WIDGET (expander);
 745   container = GTK_CONTAINER (expander);
 746
 747   gtk_widget_style_get (widget,
 748                         "interior-focus", &interior_focus,
 749                         "focus-line-width", &focus_width,
 750                         "focus-padding", &focus_pad,
 751                         "expander-size", &expander_size,
 752                         "expander-spacing", &expander_spacing,
 753                         NULL);
 754
 755   area.x = widget->allocation.x + container->border_width;
 756   area.y = widget->allocation.y + container->border_width;
 757   area.width = widget->allocation.width - (2 * container->border_width);
 758
 759   if (priv->label_widget && GTK_WIDGET_VISIBLE (priv->label_widget))
 760     area.height = priv->label_widget->allocation.height;
 761   else
 762     area.height = 0;
 763
 764   area.height += interior_focus ? (focus_width + focus_pad) * 2 : 0;
 765   area.height = MAX (area.height, expander_size + 2 * expander_spacing);
 766   area.height += !interior_focus ? (focus_width + focus_pad) * 2 : 0;
 767
 768   gtk_paint_flat_box (widget->style, widget->window,
 769                       GTK_STATE_PRELIGHT,
 770                       GTK_SHADOW_ETCHED_OUT,
 771                       &area, widget, "expander",
 772                       area.x, area.y,
 773                       area.width, area.height);
 774 }
 775
 776 static void
 777 gtk_expander_paint (GtkExpander *expander)
 778 {
 779   GtkWidget *widget;
 780   GdkRectangle clip;
 781   GtkStateType state;
 782
 783   widget = GTK_WIDGET (expander);
 784
 785   get_expander_bounds (expander, &clip);
 786
 787   state = widget->state;
 788   if (expander->priv->prelight)
 789     {
 790       state = GTK_STATE_PRELIGHT;
 791
 792       gtk_expander_paint_prelight (expander);
 793     }
 794
 795   gtk_paint_expander (widget->style,
 796                       widget->window,
 797                       state,
 798                       &clip,
 799                       widget,
 800                       "expander",
 801                       clip.x + clip.width / 2,
 802                       clip.y + clip.height / 2,
 803                       expander->priv->expander_style);
 804 }
 805
 806 static void
 807 gtk_expander_paint_focus (GtkExpander  *expander,
 808                           GdkRectangle *area)
 809 {
 810   GtkWidget *widget;
 811   GtkExpanderPrivate *priv;
 812   gint x, y, width, height;
 813   gboolean interior_focus;
 814   gint border_width;
 815   gint focus_width;
 816   gint focus_pad;
 817   gint expander_size;
 818   gint expander_spacing;
 819   gboolean ltr;
 820
 821   widget = GTK_WIDGET (expander);
 822   priv = expander->priv;
 823
 824   border_width = GTK_CONTAINER (widget)->border_width;
 825
 826   gtk_widget_style_get (widget,
 827                         "interior-focus", &interior_focus,
 828                         "focus-line-width", &focus_width,
 829                         "focus-padding", &focus_pad,
 830                         "expander-size", &expander_size,
 831                         "expander-spacing", &expander_spacing,
 832                         NULL);
 833
 834   ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
 835
 836   width = height = 0;
 837
 838   if (priv->label_widget && GTK_WIDGET_VISIBLE (priv->label_widget))
 839     {
 840       GtkAllocation label_allocation = priv->label_widget->allocation;
 841
 842       width  = label_allocation.width;
 843       height = label_allocation.height;
 844     }
 845
 846   width  += 2 * focus_pad + 2 * focus_width;
 847   height += 2 * focus_pad + 2 * focus_width;
 848
 849   x = widget->allocation.x + border_width;
 850   y = widget->allocation.y + border_width;
 851
 852   if (ltr)
 853     {
 854       if (interior_focus)
 855         x += expander_spacing * 2 + expander_size;
 856     }
 857   else
 858     {
 859       x += widget->allocation.width - 2 * border_width
 860         - expander_spacing * 2 - expander_size - width;
 861     }
 862
 863   if (!interior_focus)
 864     {
 865       width += expander_size + 2 * expander_spacing;
 866       height = MAX (height, expander_size + 2 * expander_spacing);
 867     }
 868
 869   gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
 870                    area, widget, "expander",
 871                    x, y, width, height);
 872 }
 873
 874 static gboolean
 875 gtk_expander_expose (GtkWidget      *widget,
 876                      GdkEventExpose *event)
 877 {
 878   if (GTK_WIDGET_DRAWABLE (widget))
 879     {
 880       GtkExpander *expander = GTK_EXPANDER (widget);
 881
 882       gtk_expander_paint (expander);
 883
 884       if (GTK_WIDGET_HAS_FOCUS (expander))
 885         gtk_expander_paint_focus (expander, &event->area);
 886
 887       GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
 888     }
 889
 890   return FALSE;
 891 }
 892
 893 static gboolean
 894 gtk_expander_button_press (GtkWidget      *widget,
 895                            GdkEventButton *event)
 896 {
 897   GtkExpander *expander = GTK_EXPANDER (widget);
 898
 899   if (event->button == 1 && event->window == expander->priv->event_window)
 900     {
 901       expander->priv->button_down = TRUE;
 902       return TRUE;
 903     }
 904
 905   return FALSE;
 906 }
 907
 908 static gboolean
 909 gtk_expander_button_release (GtkWidget      *widget,
 910                              GdkEventButton *event)
 911 {
 912   GtkExpander *expander = GTK_EXPANDER (widget);
 913
 914   if (event->button == 1 && expander->priv->button_down)
 915     {
 916       gtk_widget_activate (widget);
 917       expander->priv->button_down = FALSE;
 918       return TRUE;
 919     }
 920
 921   return FALSE;
 922 }
 923
 924 static void
 925 gtk_expander_grab_notify (GtkWidget *widget,
 926                           gboolean   was_grabbed)
 927 {
 928   if (!was_grabbed)
 929     GTK_EXPANDER (widget)->priv->button_down = FALSE;
 930 }
 931
 932 static void
 933 gtk_expander_state_changed (GtkWidget    *widget,
 934                             GtkStateType  previous_state)
 935 {
 936   if (!GTK_WIDGET_IS_SENSITIVE (widget))
 937     GTK_EXPANDER (widget)->priv->button_down = FALSE;
 938 }
 939
 940 static void
 941 gtk_expander_redraw_expander (GtkExpander *expander)
 942 {
 943   GtkWidget *widget;
 944
 945   widget = GTK_WIDGET (expander);
 946
 947   if (GTK_WIDGET_REALIZED (widget))
 948     gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
 949 }
 950
 951 static gboolean
 952 gtk_expander_enter_notify (GtkWidget        *widget,
 953                            GdkEventCrossing *event)
 954 {
 955   GtkExpander *expander = GTK_EXPANDER (widget);
 956   GtkWidget *event_widget;
 957
 958   event_widget = gtk_get_event_widget ((GdkEvent *) event);
 959
 960   if (event_widget == widget &&
 961       event->detail != GDK_NOTIFY_INFERIOR)
 962     {
 963       expander->priv->prelight = TRUE;
 964
 965       if (expander->priv->label_widget)
 966         gtk_widget_set_state (expander->priv->label_widget, GTK_STATE_PRELIGHT);
 967
 968       gtk_expander_redraw_expander (expander);
 969     }
 970
 971   return FALSE;
 972 }
 973
 974 static gboolean
 975 gtk_expander_leave_notify (GtkWidget        *widget,
 976                            GdkEventCrossing *event)
 977 {
 978   GtkExpander *expander = GTK_EXPANDER (widget);
 979   GtkWidget *event_widget;
 980
 981   event_widget = gtk_get_event_widget ((GdkEvent *) event);
 982
 983   if (event_widget == widget &&
 984       event->detail != GDK_NOTIFY_INFERIOR)
 985     {
 986       expander->priv->prelight = FALSE;
 987
 988       if (expander->priv->label_widget)
 989         gtk_widget_set_state (expander->priv->label_widget, GTK_STATE_NORMAL);
 990
 991       gtk_expander_redraw_expander (expander);
 992     }
 993
 994   return FALSE;
 995 }
 996
 997 static gboolean
 998 expand_timeout (gpointer data)
 999 {
1000   GtkExpander *expander = GTK_EXPANDER (data);
1001   GtkExpanderPrivate *priv = expander->priv;
1002
1003   priv->expand_timer = 0;
1004   gtk_expander_set_expanded (expander, TRUE);
1005
1006   return FALSE;
1007 }
1008
1009 static gboolean
1010 gtk_expander_drag_motion (GtkWidget        *widget,
1011                           GdkDragContext   *context,
1012                           gint              x,
1013                           gint              y,
1014                           guint             time)
1015 {
1016   GtkExpander *expander = GTK_EXPANDER (widget);
1017   GtkExpanderPrivate *priv = expander->priv;
1018
1019   if (!priv->expanded && !priv->expand_timer)
1020     {
1021       GtkSettings *settings;
1022       guint timeout;
1023
1024       settings = gtk_widget_get_settings (widget);
1025       g_object_get (settings, "gtk-timeout-expand", &timeout, NULL);
1026
1027       priv->expand_timer = g_timeout_add (timeout, (GSourceFunc) expand_timeout, expander);
1028     }
1029
1030   return TRUE;
1031 }
1032
1033 static void
1034 gtk_expander_drag_leave (GtkWidget      *widget,
1035                          GdkDragContext *context,
1036                          guint           time)
1037 {
1038   GtkExpander *expander = GTK_EXPANDER (widget);
1039   GtkExpanderPrivate *priv = expander->priv;
1040
1041   if (priv->expand_timer)
1042     {
1043       g_source_remove (priv->expand_timer);
1044       priv->expand_timer = 0;
1045     }
1046 }
1047
1048 typedef enum
1049 {
1050   FOCUS_NONE,
1051   FOCUS_WIDGET,
1052   FOCUS_LABEL,
1053   FOCUS_CHILD
1054 } FocusSite;
1055
1056 static gboolean
1057 focus_current_site (GtkExpander      *expander,
1058                     GtkDirectionType  direction)
1059 {
1060   GtkWidget *current_focus;
1061
1062   current_focus = GTK_CONTAINER (expander)->focus_child;
1063
1064   if (!current_focus)
1065     return FALSE;
1066
1067   return gtk_widget_child_focus (current_focus, direction);
1068 }
1069
1070 static gboolean
1071 focus_in_site (GtkExpander      *expander,
1072                FocusSite         site,
1073                GtkDirectionType  direction)
1074 {
1075   switch (site)
1076     {
1077     case FOCUS_WIDGET:
1078       gtk_widget_grab_focus (GTK_WIDGET (expander));
1079       return TRUE;
1080     case FOCUS_LABEL:
1081       if (expander->priv->label_widget)
1082         return gtk_widget_child_focus (expander->priv->label_widget, direction);
1083       else
1084         return FALSE;
1085     case FOCUS_CHILD:
1086       {
1087         GtkWidget *child = gtk_bin_get_child (GTK_BIN (expander));
1088
1089         if (child && GTK_WIDGET_CHILD_VISIBLE (child))
1090           return gtk_widget_child_focus (child, direction);
1091         else
1092           return FALSE;
1093       }
1094     case FOCUS_NONE:
1095       break;
1096     }
1097
1098   g_assert_not_reached ();
1099   return FALSE;
1100 }
1101
1102 static FocusSite
1103 get_next_site (GtkExpander      *expander,
1104                FocusSite         site,
1105                GtkDirectionType  direction)
1106 {
1107   gboolean ltr;
1108
1109   ltr = gtk_widget_get_direction (GTK_WIDGET (expander)) != GTK_TEXT_DIR_RTL;
1110
1111   switch (site)
1112     {
1113     case FOCUS_NONE:
1114       switch (direction)
1115         {
1116         case GTK_DIR_TAB_BACKWARD:
1117         case GTK_DIR_LEFT:
1118         case GTK_DIR_UP:
1119           return FOCUS_CHILD;
1120         case GTK_DIR_TAB_FORWARD:
1121         case GTK_DIR_DOWN:
1122         case GTK_DIR_RIGHT:
1123           return FOCUS_WIDGET;
1124         }
1125     case FOCUS_WIDGET:
1126       switch (direction)
1127         {
1128         case GTK_DIR_TAB_BACKWARD:
1129         case GTK_DIR_UP:
1130           return FOCUS_NONE;
1131         case GTK_DIR_LEFT:
1132           return ltr ? FOCUS_NONE : FOCUS_LABEL;
1133         case GTK_DIR_TAB_FORWARD:
1134         case GTK_DIR_DOWN:
1135           return FOCUS_LABEL;
1136         case GTK_DIR_RIGHT:
1137           return ltr ? FOCUS_LABEL : FOCUS_NONE;
1138           break;
1139         }
1140     case FOCUS_LABEL:
1141       switch (direction)
1142         {
1143         case GTK_DIR_TAB_BACKWARD:
1144         case GTK_DIR_UP:
1145           return FOCUS_WIDGET;
1146         case GTK_DIR_LEFT:
1147           return ltr ? FOCUS_WIDGET : FOCUS_CHILD;
1148         case GTK_DIR_TAB_FORWARD:
1149         case GTK_DIR_DOWN:
1150           return FOCUS_CHILD;
1151         case GTK_DIR_RIGHT:
1152           return ltr ? FOCUS_CHILD : FOCUS_WIDGET;
1153           break;
1154         }
1155     case FOCUS_CHILD:
1156       switch (direction)
1157         {
1158         case GTK_DIR_TAB_BACKWARD:
1159         case GTK_DIR_LEFT:
1160         case GTK_DIR_UP:
1161           return FOCUS_LABEL;
1162         case GTK_DIR_TAB_FORWARD:
1163         case GTK_DIR_DOWN:
1164         case GTK_DIR_RIGHT:
1165           return FOCUS_NONE;
1166         }
1167     }
1168
1169   g_assert_not_reached ();
1170   return FOCUS_NONE;
1171 }
1172
1173 static gboolean
1174 gtk_expander_focus (GtkWidget        *widget,
1175                     GtkDirectionType  direction)
1176 {
1177   GtkExpander *expander = GTK_EXPANDER (widget);
1178
1179   if (!focus_current_site (expander, direction))
1180     {
1181       GtkWidget *old_focus_child;
1182       gboolean widget_is_focus;
1183       FocusSite site = FOCUS_NONE;
1184
1185       widget_is_focus = gtk_widget_is_focus (widget);
1186       old_focus_child = GTK_CONTAINER (widget)->focus_child;
1187
1188       if (old_focus_child && old_focus_child == expander->priv->label_widget)
1189         site = FOCUS_LABEL;
1190       else if (old_focus_child)
1191         site = FOCUS_CHILD;
1192       else if (widget_is_focus)
1193         site = FOCUS_WIDGET;
1194
1195       while ((site = get_next_site (expander, site, direction)) != FOCUS_NONE)
1196         {
1197           if (focus_in_site (expander, site, direction))
1198             return TRUE;
1199         }
1200
1201       return FALSE;
1202     }
1203
1204   return TRUE;
1205 }
1206
1207 static void
1208 gtk_expander_add (GtkContainer *container,
1209                   GtkWidget    *widget)
1210 {
1211   GTK_CONTAINER_CLASS (parent_class)->add (container, widget);
1212
1213   gtk_widget_set_child_visible (widget, GTK_EXPANDER (container)->priv->expanded);
1214   gtk_widget_queue_resize (GTK_WIDGET (container));
1215 }
1216
1217 static void
1218 gtk_expander_remove (GtkContainer *container,
1219                      GtkWidget    *widget)
1220 {
1221   GtkExpander *expander = GTK_EXPANDER (container);
1222
1223   if (GTK_EXPANDER (expander)->priv->label_widget == widget)
1224     gtk_expander_set_label_widget (expander, NULL);
1225   else
1226     GTK_CONTAINER_CLASS (parent_class)->remove (container, widget);
1227 }
1228
1229 static void
1230 gtk_expander_forall (GtkContainer *container,
1231                      gboolean      include_internals,
1232                      GtkCallback   callback,
1233                      gpointer      callback_data)
1234 {
1235   GtkBin *bin = GTK_BIN (container);
1236   GtkExpanderPrivate *priv = GTK_EXPANDER (container)->priv;
1237
1238   if (bin->child)
1239     (* callback) (bin->child, callback_data);
1240
1241   if (priv->label_widget)
1242     (* callback) (priv->label_widget, callback_data);
1243 }
1244
1245 static void
1246 gtk_expander_activate (GtkExpander *expander)
1247 {
1248   gtk_expander_set_expanded (expander, !expander->priv->expanded);
1249 }
1250
1251 /**
1252  * gtk_expander_new:
1253  * @label: the text of the label
1254  *
1255  * Creates a new expander using @label as the text of the label.
1256  *
1257  * Return value: a new #GtkExpander widget.
1258  *
1259  * Since: 2.4
1260  **/
1261 GtkWidget *
1262 gtk_expander_new (const gchar *label)
1263 {
1264   return g_object_new (GTK_TYPE_EXPANDER, "label", label, NULL);
1265 }
1266
1267 /**
1268  * gtk_expander_new_with_mnemonic:
1269  * @label: the text of the label with an underscore in front of the
1270  *         mnemonic character
1271  *
1272  * Creates a new expander using @label as the text of the label.
1273  * If characters in @label are preceded by an underscore, they are underlined.
1274  * If you need a literal underscore character in a label, use '__' (two
1275  * underscores). The first underlined character represents a keyboard
1276  * accelerator called a mnemonic.
1277  * Pressing Alt and that key activates the button.
1278  *
1279  * Return value: a new #GtkExpander widget.
1280  *
1281  * Since: 2.4
1282  **/
1283 GtkWidget *
1284 gtk_expander_new_with_mnemonic (const gchar *label)
1285 {
1286   return g_object_new (GTK_TYPE_EXPANDER,
1287                        "label", label,
1288                        "use-underline", TRUE,
1289                        NULL);
1290 }
1291
1292 static gboolean
1293 gtk_expander_animation_timeout (GtkExpander *expander)
1294 {
1295   GtkExpanderPrivate *priv = expander->priv;
1296   GdkRectangle area;
1297   gboolean finish = FALSE;
1298
1299   GDK_THREADS_ENTER();
1300
1301   if (GTK_WIDGET_REALIZED (expander))
1302     {
1303       get_expander_bounds (expander, &area);
1304       gdk_window_invalidate_rect (GTK_WIDGET (expander)->window, &area, TRUE);
1305     }
1306
1307   if (priv->expanded)
1308     {
1309       if (priv->expander_style == GTK_EXPANDER_COLLAPSED)
1310         {
1311           priv->expander_style = GTK_EXPANDER_SEMI_EXPANDED;
1312         }
1313       else
1314         {
1315           priv->expander_style = GTK_EXPANDER_EXPANDED;
1316           finish = TRUE;
1317         }
1318     }
1319   else
1320     {
1321       if (priv->expander_style == GTK_EXPANDER_EXPANDED)
1322         {
1323           priv->expander_style = GTK_EXPANDER_SEMI_COLLAPSED;
1324         }
1325       else
1326         {
1327           priv->expander_style = GTK_EXPANDER_COLLAPSED;
1328           finish = TRUE;
1329         }
1330     }
1331
1332   if (finish)
1333     {
1334       priv->animation_timeout = 0;
1335       if (GTK_BIN (expander)->child)
1336         gtk_widget_set_child_visible (GTK_BIN (expander)->child, priv->expanded);
1337       gtk_widget_queue_resize (GTK_WIDGET (expander));
1338     }
1339
1340   GDK_THREADS_LEAVE();
1341
1342   return !finish;
1343 }
1344
1345 static void
1346 gtk_expander_start_animation (GtkExpander *expander)
1347 {
1348   GtkExpanderPrivate *priv = expander->priv;
1349
1350   if (priv->animation_timeout)
1351     g_source_remove (priv->animation_timeout);
1352
1353   priv->animation_timeout =
1354                 g_timeout_add (50,
1355                                (GSourceFunc) gtk_expander_animation_timeout,
1356                                expander);
1357 }
1358
1359 /**
1360  * gtk_expander_set_expanded:
1361  * @expander: a #GtkExpander
1362  * @expanded: whether the child widget is revealed
1363  *
1364  * Sets the state of the expander. Set to %TRUE, if you want
1365  * the child widget to be revealed, and %FALSE if you want the
1366  * child widget to be hidden.
1367  *
1368  * Since: 2.4
1369  **/
1370 void
1371 gtk_expander_set_expanded (GtkExpander *expander,
1372                            gboolean     expanded)
1373 {
1374   GtkExpanderPrivate *priv;
1375
1376   g_return_if_fail (GTK_IS_EXPANDER (expander));
1377
1378   priv = expander->priv;
1379
1380   expanded = expanded != FALSE;
1381
1382   if (priv->expanded != expanded)
1383     {
1384       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (expander));
1385       gboolean     enable_animations;
1386
1387       priv->expanded = expanded;
1388
1389       g_object_get (settings, "gtk-enable-animations", &enable_animations, NULL);
1390
1391       if (enable_animations && GTK_WIDGET_REALIZED (expander))
1392         {
1393           gtk_expander_start_animation (expander);
1394         }
1395       else
1396         {
1397           priv->expander_style = expanded ? GTK_EXPANDER_EXPANDED :
1398                                             GTK_EXPANDER_COLLAPSED;
1399
1400           if (GTK_BIN (expander)->child)
1401             {
1402               gtk_widget_set_child_visible (GTK_BIN (expander)->child, priv->expanded);
1403               gtk_widget_queue_resize (GTK_WIDGET (expander));
1404             }
1405         }
1406
1407       g_object_notify (G_OBJECT (expander), "expanded");
1408     }
1409 }
1410
1411 /**
1412  * gtk_expander_get_expanded:
1413  * @expander:a #GtkExpander
1414  *
1415  * Queries a #GtkExpander and returns its current state. Returns %TRUE
1416  * if the child widget is revealed.
1417  *
1418  * See gtk_expander_set_expanded().
1419  *
1420  * Return value: the current state of the expander.
1421  *
1422  * Since: 2.4
1423  **/
1424 gboolean
1425 gtk_expander_get_expanded (GtkExpander *expander)
1426 {
1427   g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
1428
1429   return expander->priv->expanded;
1430 }
1431
1432 /**
1433  * gtk_expander_set_spacing:
1434  * @expander: a #GtkExpander
1435  * @spacing: distance between the expander and child in pixels.
1436  *
1437  * Sets the spacing field of @expander, which is the number of pixels to
1438  * place between expander and the child.
1439  *
1440  * Since: 2.4
1441  **/
1442 void
1443 gtk_expander_set_spacing (GtkExpander *expander,
1444                           gint         spacing)
1445 {
1446   g_return_if_fail (GTK_IS_EXPANDER (expander));
1447   g_return_if_fail (spacing >= 0);
1448
1449   if (expander->priv->spacing != spacing)
1450     {
1451       expander->priv->spacing = spacing;
1452
1453       gtk_widget_queue_resize (GTK_WIDGET (expander));
1454
1455       g_object_notify (G_OBJECT (expander), "spacing");
1456     }
1457 }
1458
1459 /**
1460  * gtk_expander_get_spacing:
1461  * @expander: a #GtkExpander
1462  *
1463  * Gets the value set by gtk_expander_set_spacing().
1464  *
1465  * Return value: spacing between the expander and child.
1466  *
1467  * Since: 2.4
1468  **/
1469 gint
1470 gtk_expander_get_spacing (GtkExpander *expander)
1471 {
1472   g_return_val_if_fail (GTK_IS_EXPANDER (expander), 0);
1473
1474   return expander->priv->spacing;
1475 }
1476
1477 /**
1478  * gtk_expander_set_label:
1479  * @expander: a #GtkExpander
1480  * @label: a string
1481  *
1482  * Sets the text of the label of the expander to @label.
1483  *
1484  * This will also clear any previously set labels.
1485  *
1486  * Since: 2.4
1487  **/
1488 void
1489 gtk_expander_set_label (GtkExpander *expander,
1490                         const gchar *label)
1491 {
1492   g_return_if_fail (GTK_IS_EXPANDER (expander));
1493
1494   if (!label)
1495     {
1496       gtk_expander_set_label_widget (expander, NULL);
1497     }
1498   else
1499     {
1500       GtkWidget *child;
1501
1502       child = gtk_label_new (label);
1503       gtk_label_set_use_underline (GTK_LABEL (child), expander->priv->use_underline);
1504       gtk_label_set_use_markup (GTK_LABEL (child), expander->priv->use_markup);
1505       gtk_widget_show (child);
1506
1507       gtk_expander_set_label_widget (expander, child);
1508     }
1509
1510   g_object_notify (G_OBJECT (expander), "label");
1511 }
1512
1513 /**
1514  * gtk_expander_get_label:
1515  * @expander: a #GtkExpander
1516  *
1517  * Fetches the text from the label of the expander, as set by
1518  * gtk_expander_set_label(). If the label text has not
1519  * been set the return value will be %NULL. This will be the
1520  * case if you create an empty button with gtk_button_new() to
1521  * use as a container.
1522  *
1523  * Return value: The text of the label widget. This string is owned
1524  * by the widget and must not be modified or freed.
1525  *
1526  * Since: 2.4
1527  **/
1528 G_CONST_RETURN char *
1529 gtk_expander_get_label (GtkExpander *expander)
1530 {
1531   GtkExpanderPrivate *priv;
1532
1533   g_return_val_if_fail (GTK_IS_EXPANDER (expander), NULL);
1534
1535   priv = expander->priv;
1536
1537   if (priv->label_widget && GTK_IS_LABEL (priv->label_widget))
1538     return gtk_label_get_text (GTK_LABEL (priv->label_widget));
1539   else
1540     return NULL;
1541 }
1542
1543 /**
1544  * gtk_expander_set_use_underline:
1545  * @expander: a #GtkExpander
1546  * @use_underline: %TRUE if underlines in the text indicate mnemonics
1547  *
1548  * If true, an underline in the text of the expander label indicates
1549  * the next character should be used for the mnemonic accelerator key.
1550  *
1551  * Since: 2.4
1552  **/
1553 void
1554 gtk_expander_set_use_underline (GtkExpander *expander,
1555                                 gboolean     use_underline)
1556 {
1557   GtkExpanderPrivate *priv;
1558
1559   g_return_if_fail (GTK_IS_EXPANDER (expander));
1560
1561   priv = expander->priv;
1562
1563   use_underline = use_underline != FALSE;
1564
1565   if (priv->use_underline != use_underline)
1566     {
1567       priv->use_underline = use_underline;
1568
1569       if (priv->label_widget && GTK_IS_LABEL (priv->label_widget))
1570         gtk_label_set_use_underline (GTK_LABEL (priv->label_widget), use_underline);
1571
1572       g_object_notify (G_OBJECT (expander), "use-underline");
1573     }
1574 }
1575
1576 /**
1577  * gtk_expander_get_use_underline:
1578  * @expander: a #GtkExpander
1579  *
1580  * Returns whether an embedded underline in the expander label indicates a
1581  * mnemonic. See gtk_expander_set_use_underline().
1582  *
1583  * Return value: %TRUE if an embedded underline in the expander label
1584  *               indicates the mnemonic accelerator keys.
1585  *
1586  * Since: 2.4
1587  **/
1588 gboolean
1589 gtk_expander_get_use_underline (GtkExpander *expander)
1590 {
1591   g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
1592
1593   return expander->priv->use_underline;
1594 }
1595
1596 /**
1597  * gtk_expander_set_use_markup:
1598  * @expander: a #GtkExpander
1599  * @use_markup: %TRUE if the label's text should be parsed for markup
1600  *
1601  * Sets whether the text of the label contains markup in <link
1602  * linkend="PangoMarkupFormat">Pango's text markup
1603  * language</link>. See gtk_label_set_markup().
1604  *
1605  * Since: 2.4
1606  **/
1607 void
1608 gtk_expander_set_use_markup (GtkExpander *expander,
1609                              gboolean     use_markup)
1610 {
1611   GtkExpanderPrivate *priv;
1612
1613   g_return_if_fail (GTK_IS_EXPANDER (expander));
1614
1615   priv = expander->priv;
1616
1617   use_markup = use_markup != FALSE;
1618
1619   if (priv->use_markup != use_markup)
1620     {
1621       priv->use_markup = use_markup;
1622
1623       if (priv->label_widget && GTK_IS_LABEL (priv->label_widget))
1624         gtk_label_set_use_markup (GTK_LABEL (priv->label_widget), use_markup);
1625
1626       g_object_notify (G_OBJECT (expander), "use-markup");
1627     }
1628 }
1629
1630 /**
1631  * gtk_expander_get_use_markup:
1632  * @expander: a #GtkExpander
1633  *
1634  * Returns whether the label's text is interpreted as marked up with
1635  * the <link linkend="PangoMarkupFormat">Pango text markup
1636  * language</link>. See gtk_expander_set_use_markup ().
1637  *
1638  * Return value: %TRUE if the label's text will be parsed for markup
1639  *
1640  * Since: 2.4
1641  **/
1642 gboolean
1643 gtk_expander_get_use_markup (GtkExpander *expander)
1644 {
1645   g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
1646
1647   return expander->priv->use_markup;
1648 }
1649
1650 /**
1651  * gtk_expander_set_label_widget:
1652  * @expander: a #GtkExpander
1653  * @label_widget: the new label widget
1654  *
1655  * Set the label widget for the expander. This is the widget
1656  * that will appear embedded alongside the expander arrow.
1657  *
1658  * Since: 2.4
1659  **/
1660 void
1661 gtk_expander_set_label_widget (GtkExpander *expander,
1662                                GtkWidget   *label_widget)
1663 {
1664   GtkExpanderPrivate *priv;
1665
1666   g_return_if_fail (GTK_IS_EXPANDER (expander));
1667   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
1668   g_return_if_fail (label_widget == NULL || label_widget->parent == NULL);
1669
1670   priv = expander->priv;
1671
1672   if (priv->label_widget == label_widget)
1673     return;
1674
1675   if (priv->label_widget)
1676     {
1677       gtk_widget_set_state (priv->label_widget, GTK_STATE_NORMAL);
1678       gtk_widget_unparent (priv->label_widget);
1679     }
1680
1681   priv->label_widget = label_widget;
1682
1683   if (label_widget)
1684     {
1685       priv->label_widget = label_widget;
1686
1687       gtk_widget_set_parent (label_widget, GTK_WIDGET (expander));
1688
1689       if (priv->prelight)
1690         gtk_widget_set_state (label_widget, GTK_STATE_PRELIGHT);
1691     }
1692
1693   if (GTK_WIDGET_VISIBLE (expander))
1694     gtk_widget_queue_resize (GTK_WIDGET (expander));
1695
1696   g_object_freeze_notify (G_OBJECT (expander));
1697   g_object_notify (G_OBJECT (expander), "label-widget");
1698   g_object_notify (G_OBJECT (expander), "label");
1699   g_object_thaw_notify (G_OBJECT (expander));
1700 }
1701
1702 /**
1703  * gtk_expander_get_label_widget:
1704  * @expander: a #GtkExpander
1705  *
1706  * Retrieves the label widget for the frame. See
1707  * gtk_expander_set_label_widget().
1708  *
1709  * Return value: the label widget, or %NULL if there is none.
1710  *
1711  * Since: 2.4
1712  **/
1713 GtkWidget *
1714 gtk_expander_get_label_widget (GtkExpander *expander)
1715 {
1716   g_return_val_if_fail (GTK_IS_EXPANDER (expander), NULL);
1717
1718   return expander->priv->label_widget;
1719 }
1720
1721 #define __GTK_EXPANDER_C__
1722 #include "gtkaliasdef.c"