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 #include <string.h>
  26 #include "gtkexpander.h"
  27
  28 #include "gtklabel.h"
  29 #include "gtkbuildable.h"
  30 #include "gtkcontainer.h"
  31 #include "gtkmarshalers.h"
  32 #include "gtkmain.h"
  33 #include "gtkintl.h"
  34 #include "gtkprivate.h"
  35 #include <gdk/gdkkeysyms.h>
  36 #include "gtkdnd.h"
  37 #include "gtkalias.h"
  38
  39 #define GTK_EXPANDER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GTK_TYPE_EXPANDER, GtkExpanderPrivate))
  40
  41 #define DEFAULT_EXPANDER_SIZE 10
  42 #define DEFAULT_EXPANDER_SPACING 2
  43
  44 enum
  45 {
  46   PROP_0,
  47   PROP_EXPANDED,
  48   PROP_LABEL,
  49   PROP_USE_UNDERLINE,
  50   PROP_USE_MARKUP,
  51   PROP_SPACING,
  52   PROP_LABEL_WIDGET
  53 };
  54
  55 struct _GtkExpanderPrivate
  56 {
  57   GtkWidget        *label_widget;
  58   GdkWindow        *event_window;
  59   gint              spacing;
  60
  61   GtkExpanderStyle  expander_style;
  62   guint             animation_timeout;
  63   guint             expand_timer;
  64
  65   guint             expanded : 1;
  66   guint             use_underline : 1;
  67   guint             use_markup : 1;
  68   guint             button_down : 1;
  69   guint             prelight : 1;
  70 };
  71
  72 static void gtk_expander_set_property (GObject          *object,
  73                                        guint             prop_id,
  74                                        const GValue     *value,
  75                                        GParamSpec       *pspec);
  76 static void gtk_expander_get_property (GObject          *object,
  77                                        guint             prop_id,
  78                                        GValue           *value,
  79                                        GParamSpec       *pspec);
  80
  81 static void gtk_expander_destroy (GtkObject *object);
  82
  83 static void     gtk_expander_realize        (GtkWidget        *widget);
  84 static void     gtk_expander_unrealize      (GtkWidget        *widget);
  85 static void     gtk_expander_size_request   (GtkWidget        *widget,
  86                                              GtkRequisition   *requisition);
  87 static void     gtk_expander_size_allocate  (GtkWidget        *widget,
  88                                              GtkAllocation    *allocation);
  89 static void     gtk_expander_map            (GtkWidget        *widget);
  90 static void     gtk_expander_unmap          (GtkWidget        *widget);
  91 static gboolean gtk_expander_expose         (GtkWidget        *widget,
  92                                              GdkEventExpose   *event);
  93 static gboolean gtk_expander_button_press   (GtkWidget        *widget,
  94                                              GdkEventButton   *event);
  95 static gboolean gtk_expander_button_release (GtkWidget        *widget,
  96                                              GdkEventButton   *event);
  97 static gboolean gtk_expander_enter_notify   (GtkWidget        *widget,
  98                                              GdkEventCrossing *event);
  99 static gboolean gtk_expander_leave_notify   (GtkWidget        *widget,
 100                                              GdkEventCrossing *event);
 101 static gboolean gtk_expander_focus          (GtkWidget        *widget,
 102                                              GtkDirectionType  direction);
 103 static void     gtk_expander_grab_notify    (GtkWidget        *widget,
 104                                              gboolean          was_grabbed);
 105 static void     gtk_expander_state_changed  (GtkWidget        *widget,
 106                                              GtkStateType      previous_state);
 107 static gboolean gtk_expander_drag_motion    (GtkWidget        *widget,
 108                                              GdkDragContext   *context,
 109                                              gint              x,
 110                                              gint              y,
 111                                              guint             time);
 112 static void     gtk_expander_drag_leave     (GtkWidget        *widget,
 113                                              GdkDragContext   *context,
 114                                              guint             time);
 115
 116 static void gtk_expander_add    (GtkContainer *container,
 117                                  GtkWidget    *widget);
 118 static void gtk_expander_remove (GtkContainer *container,
 119                                  GtkWidget    *widget);
 120 static void gtk_expander_forall (GtkContainer *container,
 121                                  gboolean        include_internals,
 122                                  GtkCallback     callback,
 123                                  gpointer        callback_data);
 124
 125 static void gtk_expander_activate (GtkExpander *expander);
 126
 127 static void get_expander_bounds (GtkExpander  *expander,
 128                                  GdkRectangle *rect);
 129
 130 /* GtkBuildable */
 131 static void gtk_expander_buildable_init           (GtkBuildableIface *iface);
 132 static void gtk_expander_buildable_add_child      (GtkBuildable *buildable,
 133                                                    GtkBuilder   *builder,
 134                                                    GObject      *child,
 135                                                    const gchar  *type);
 136
 137 G_DEFINE_TYPE_WITH_CODE (GtkExpander, gtk_expander, GTK_TYPE_BIN,
 138                          G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
 139                                                 gtk_expander_buildable_init))
 140
 141 static void
 142 gtk_expander_class_init (GtkExpanderClass *klass)
 143 {
 144   GObjectClass *gobject_class;
 145   GtkObjectClass *object_class;
 146   GtkWidgetClass *widget_class;
 147   GtkContainerClass *container_class;
 148
 149   gobject_class   = (GObjectClass *) klass;
 150   object_class    = (GtkObjectClass *) klass;
 151   widget_class    = (GtkWidgetClass *) klass;
 152   container_class = (GtkContainerClass *) klass;
 153
 154   gobject_class->set_property = gtk_expander_set_property;
 155   gobject_class->get_property = gtk_expander_get_property;
 156
 157   object_class->destroy = gtk_expander_destroy;
 158
 159   widget_class->realize              = gtk_expander_realize;
 160   widget_class->unrealize            = gtk_expander_unrealize;
 161   widget_class->size_request         = gtk_expander_size_request;
 162   widget_class->size_allocate        = gtk_expander_size_allocate;
 163   widget_class->map                  = gtk_expander_map;
 164   widget_class->unmap                = gtk_expander_unmap;
 165   widget_class->expose_event         = gtk_expander_expose;
 166   widget_class->button_press_event   = gtk_expander_button_press;
 167   widget_class->button_release_event = gtk_expander_button_release;
 168   widget_class->enter_notify_event   = gtk_expander_enter_notify;
 169   widget_class->leave_notify_event   = gtk_expander_leave_notify;
 170   widget_class->focus                = gtk_expander_focus;
 171   widget_class->grab_notify          = gtk_expander_grab_notify;
 172   widget_class->state_changed        = gtk_expander_state_changed;
 173   widget_class->drag_motion          = gtk_expander_drag_motion;
 174   widget_class->drag_leave           = gtk_expander_drag_leave;
 175
 176   container_class->add    = gtk_expander_add;
 177   container_class->remove = gtk_expander_remove;
 178   container_class->forall = gtk_expander_forall;
 179
 180   klass->activate = gtk_expander_activate;
 181
 182   g_type_class_add_private (klass, sizeof (GtkExpanderPrivate));
 183
 184   g_object_class_install_property (gobject_class,
 185                                    PROP_EXPANDED,
 186                                    g_param_spec_boolean ("expanded",
 187                                                          P_("Expanded"),
 188                                                          P_("Whether the expander has been opened to reveal the child widget"),
 189                                                          FALSE,
 190                                                          GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 191
 192   g_object_class_install_property (gobject_class,
 193                                    PROP_LABEL,
 194                                    g_param_spec_string ("label",
 195                                                         P_("Label"),
 196                                                         P_("Text of the expander's label"),
 197                                                         NULL,
 198                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 199
 200   g_object_class_install_property (gobject_class,
 201                                    PROP_USE_UNDERLINE,
 202                                    g_param_spec_boolean ("use-underline",
 203                                                          P_("Use underline"),
 204                                                          P_("If set, an underline in the text indicates the next character should be used for the mnemonic accelerator key"),
 205                                                          FALSE,
 206                                                          GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 207
 208   g_object_class_install_property (gobject_class,
 209                                    PROP_USE_MARKUP,
 210                                    g_param_spec_boolean ("use-markup",
 211                                                          P_("Use markup"),
 212                                                          P_("The text of the label includes XML markup. See pango_parse_markup()"),
 213                                                          FALSE,
 214                                                          GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 215
 216   g_object_class_install_property (gobject_class,
 217                                    PROP_SPACING,
 218                                    g_param_spec_int ("spacing",
 219                                                      P_("Spacing"),
 220                                                      P_("Space to put between the label and the child"),
 221                                                      0,
 222                                                      G_MAXINT,
 223                                                      0,
 224                                                      GTK_PARAM_READWRITE));
 225
 226   g_object_class_install_property (gobject_class,
 227                                    PROP_LABEL_WIDGET,
 228                                    g_param_spec_object ("label-widget",
 229                                                         P_("Label widget"),
 230                                                         P_("A widget to display in place of the usual expander label"),
 231                                                         GTK_TYPE_WIDGET,
 232                                                         GTK_PARAM_READWRITE));
 233
 234   gtk_widget_class_install_style_property (widget_class,
 235                                            g_param_spec_int ("expander-size",
 236                                                              P_("Expander Size"),
 237                                                              P_("Size of the expander arrow"),
 238                                                              0,
 239                                                              G_MAXINT,
 240                                                              DEFAULT_EXPANDER_SIZE,
 241                                                              GTK_PARAM_READABLE));
 242
 243   gtk_widget_class_install_style_property (widget_class,
 244                                            g_param_spec_int ("expander-spacing",
 245                                                              P_("Indicator Spacing"),
 246                                                              P_("Spacing around expander arrow"),
 247                                                              0,
 248                                                              G_MAXINT,
 249                                                              DEFAULT_EXPANDER_SPACING,
 250                                                              GTK_PARAM_READABLE));
 251
 252   widget_class->activate_signal =
 253     g_signal_new (I_("activate"),
 254                   G_TYPE_FROM_CLASS (gobject_class),
 255                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 256                   G_STRUCT_OFFSET (GtkExpanderClass, activate),
 257                   NULL, NULL,
 258                   _gtk_marshal_VOID__VOID,
 259                   G_TYPE_NONE, 0);
 260 }
 261
 262 static void
 263 gtk_expander_init (GtkExpander *expander)
 264 {
 265   GtkExpanderPrivate *priv;
 266
 267   expander->priv = priv = GTK_EXPANDER_GET_PRIVATE (expander);
 268
 269   GTK_WIDGET_SET_FLAGS (expander, GTK_CAN_FOCUS);
 270   GTK_WIDGET_SET_FLAGS (expander, GTK_NO_WINDOW);
 271
 272   priv->label_widget = NULL;
 273   priv->event_window = NULL;
 274   priv->spacing = 0;
 275
 276   priv->expander_style = GTK_EXPANDER_COLLAPSED;
 277   priv->animation_timeout = 0;
 278
 279   priv->expanded = FALSE;
 280   priv->use_underline = FALSE;
 281   priv->use_markup = FALSE;
 282   priv->button_down = FALSE;
 283   priv->prelight = FALSE;
 284   priv->expand_timer = 0;
 285
 286   gtk_drag_dest_set (GTK_WIDGET (expander), 0, NULL, 0, 0);
 287   gtk_drag_dest_set_track_motion (GTK_WIDGET (expander), TRUE);
 288 }
 289
 290 static void
 291 gtk_expander_buildable_add_child (GtkBuildable  *buildable,
 292                                   GtkBuilder    *builder,
 293                                   GObject       *child,
 294                                   const gchar   *type)
 295 {
 296   if (!type)
 297     gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
 298   else if (strcmp (type, "label") == 0)
 299     gtk_expander_set_label_widget (GTK_EXPANDER (buildable), GTK_WIDGET (child));
 300   else
 301     GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_EXPANDER (buildable), type);
 302 }
 303
 304 static void
 305 gtk_expander_buildable_init (GtkBuildableIface *iface)
 306 {
 307   iface->add_child = gtk_expander_buildable_add_child;
 308 }
 309
 310 static void
 311 gtk_expander_set_property (GObject      *object,
 312                            guint         prop_id,
 313                            const GValue *value,
 314                            GParamSpec   *pspec)
 315 {
 316   GtkExpander *expander = GTK_EXPANDER (object);
 317
 318   switch (prop_id)
 319     {
 320     case PROP_EXPANDED:
 321       gtk_expander_set_expanded (expander, g_value_get_boolean (value));
 322       break;
 323     case PROP_LABEL:
 324       gtk_expander_set_label (expander, g_value_get_string (value));
 325       break;
 326     case PROP_USE_UNDERLINE:
 327       gtk_expander_set_use_underline (expander, g_value_get_boolean (value));
 328       break;
 329     case PROP_USE_MARKUP:
 330       gtk_expander_set_use_markup (expander, g_value_get_boolean (value));
 331       break;
 332     case PROP_SPACING:
 333       gtk_expander_set_spacing (expander, g_value_get_int (value));
 334       break;
 335     case PROP_LABEL_WIDGET:
 336       gtk_expander_set_label_widget (expander, g_value_get_object (value));
 337       break;
 338     default:
 339       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 340       break;
 341     }
 342 }
 343
 344 static void
 345 gtk_expander_get_property (GObject    *object,
 346                            guint       prop_id,
 347                            GValue     *value,
 348                            GParamSpec *pspec)
 349 {
 350   GtkExpander *expander = GTK_EXPANDER (object);
 351   GtkExpanderPrivate *priv = expander->priv;
 352
 353   switch (prop_id)
 354     {
 355     case PROP_EXPANDED:
 356       g_value_set_boolean (value, priv->expanded);
 357       break;
 358     case PROP_LABEL:
 359       g_value_set_string (value, gtk_expander_get_label (expander));
 360       break;
 361     case PROP_USE_UNDERLINE:
 362       g_value_set_boolean (value, priv->use_underline);
 363       break;
 364     case PROP_USE_MARKUP:
 365       g_value_set_boolean (value, priv->use_markup);
 366       break;
 367     case PROP_SPACING:
 368       g_value_set_int (value, priv->spacing);
 369       break;
 370     case PROP_LABEL_WIDGET:
 371       g_value_set_object (value,
 372                           priv->label_widget ?
 373                           G_OBJECT (priv->label_widget) : NULL);
 374       break;
 375     default:
 376       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 377       break;
 378     }
 379 }
 380
 381 static void
 382 gtk_expander_destroy (GtkObject *object)
 383 {
 384   GtkExpanderPrivate *priv = GTK_EXPANDER (object)->priv;
 385
 386   if (priv->animation_timeout)
 387     {
 388       g_source_remove (priv->animation_timeout);
 389       priv->animation_timeout = 0;
 390     }
 391
 392   GTK_OBJECT_CLASS (gtk_expander_parent_class)->destroy (object);
 393 }
 394
 395 static void
 396 gtk_expander_realize (GtkWidget *widget)
 397 {
 398   GtkExpanderPrivate *priv;
 399   GdkWindowAttr attributes;
 400   gint attributes_mask;
 401   gint border_width;
 402   GdkRectangle expander_rect;
 403   gint label_height;
 404
 405   priv = GTK_EXPANDER (widget)->priv;
 406   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 407
 408   border_width = GTK_CONTAINER (widget)->border_width;
 409
 410   get_expander_bounds (GTK_EXPANDER (widget), &expander_rect);
 411
 412   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 413     {
 414       GtkRequisition label_requisition;
 415
 416       gtk_widget_get_child_requisition (priv->label_widget, &label_requisition);
 417       label_height = label_requisition.height;
 418     }
 419   else
 420     label_height = 0;
 421
 422   attributes.window_type = GDK_WINDOW_CHILD;
 423   attributes.x = widget->allocation.x + border_width;
 424   attributes.y = widget->allocation.y + border_width;
 425   attributes.width = MAX (widget->allocation.width - 2 * border_width, 1);
 426   attributes.height = MAX (expander_rect.height, label_height - 2 * border_width);
 427   attributes.wclass = GDK_INPUT_ONLY;
 428   attributes.event_mask = gtk_widget_get_events (widget)     |
 429                                 GDK_BUTTON_PRESS_MASK        |
 430                                 GDK_BUTTON_RELEASE_MASK      |
 431                                 GDK_ENTER_NOTIFY_MASK        |
 432                                 GDK_LEAVE_NOTIFY_MASK;
 433
 434   attributes_mask = GDK_WA_X | GDK_WA_Y;
 435
 436   widget->window = gtk_widget_get_parent_window (widget);
 437   g_object_ref (widget->window);
 438
 439   priv->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
 440                                        &attributes, attributes_mask);
 441   gdk_window_set_user_data (priv->event_window, widget);
 442
 443   widget->style = gtk_style_attach (widget->style, widget->window);
 444 }
 445
 446 static void
 447 gtk_expander_unrealize (GtkWidget *widget)
 448 {
 449   GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
 450
 451   if (priv->event_window)
 452     {
 453       gdk_window_set_user_data (priv->event_window, NULL);
 454       gdk_window_destroy (priv->event_window);
 455       priv->event_window = NULL;
 456     }
 457
 458   GTK_WIDGET_CLASS (gtk_expander_parent_class)->unrealize (widget);
 459 }
 460
 461 static void
 462 gtk_expander_size_request (GtkWidget      *widget,
 463                            GtkRequisition *requisition)
 464 {
 465   GtkExpander *expander;
 466   GtkBin *bin;
 467   GtkExpanderPrivate *priv;
 468   gint border_width;
 469   gint expander_size;
 470   gint expander_spacing;
 471   gboolean interior_focus;
 472   gint focus_width;
 473   gint focus_pad;
 474
 475   bin = GTK_BIN (widget);
 476   expander = GTK_EXPANDER (widget);
 477   priv = expander->priv;
 478
 479   border_width = GTK_CONTAINER (widget)->border_width;
 480
 481   gtk_widget_style_get (widget,
 482                         "interior-focus", &interior_focus,
 483                         "focus-line-width", &focus_width,
 484                         "focus-padding", &focus_pad,
 485                         "expander-size", &expander_size,
 486                         "expander-spacing", &expander_spacing,
 487                         NULL);
 488
 489   requisition->width = expander_size + 2 * expander_spacing +
 490                        2 * focus_width + 2 * focus_pad;
 491   requisition->height = interior_focus ? (2 * focus_width + 2 * focus_pad) : 0;
 492
 493   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 494     {
 495       GtkRequisition label_requisition;
 496
 497       gtk_widget_size_request (priv->label_widget, &label_requisition);
 498
 499       requisition->width  += label_requisition.width;
 500       requisition->height += label_requisition.height;
 501     }
 502
 503   requisition->height = MAX (expander_size + 2 * expander_spacing, requisition->height);
 504
 505   if (!interior_focus)
 506     requisition->height += 2 * focus_width + 2 * focus_pad;
 507
 508   if (bin->child && GTK_WIDGET_CHILD_VISIBLE (bin->child))
 509     {
 510       GtkRequisition child_requisition;
 511
 512       gtk_widget_size_request (bin->child, &child_requisition);
 513
 514       requisition->width = MAX (requisition->width, child_requisition.width);
 515       requisition->height += child_requisition.height + priv->spacing;
 516     }
 517
 518   requisition->width  += 2 * border_width;
 519   requisition->height += 2 * border_width;
 520 }
 521
 522 static void
 523 get_expander_bounds (GtkExpander  *expander,
 524                      GdkRectangle *rect)
 525 {
 526   GtkWidget *widget;
 527   GtkExpanderPrivate *priv;
 528   gint border_width;
 529   gint expander_size;
 530   gint expander_spacing;
 531   gboolean interior_focus;
 532   gint focus_width;
 533   gint focus_pad;
 534   gboolean ltr;
 535
 536   widget = GTK_WIDGET (expander);
 537   priv = expander->priv;
 538
 539   border_width = GTK_CONTAINER (expander)->border_width;
 540
 541   gtk_widget_style_get (widget,
 542                         "interior-focus", &interior_focus,
 543                         "focus-line-width", &focus_width,
 544                         "focus-padding", &focus_pad,
 545                         "expander-size", &expander_size,
 546                         "expander-spacing", &expander_spacing,
 547                         NULL);
 548
 549   ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
 550
 551   rect->x = widget->allocation.x + border_width;
 552   rect->y = widget->allocation.y + border_width;
 553
 554   if (ltr)
 555     rect->x += expander_spacing;
 556   else
 557     rect->x += widget->allocation.width - 2 * border_width -
 558                expander_spacing - expander_size;
 559
 560   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 561     {
 562       GtkAllocation label_allocation;
 563
 564       label_allocation = priv->label_widget->allocation;
 565
 566       if (expander_size < label_allocation.height)
 567         rect->y += focus_width + focus_pad + (label_allocation.height - expander_size) / 2;
 568       else
 569         rect->y += expander_spacing;
 570     }
 571   else
 572     {
 573       rect->y += expander_spacing;
 574     }
 575
 576   if (!interior_focus)
 577     {
 578       if (ltr)
 579         rect->x += focus_width + focus_pad;
 580       else
 581         rect->x -= focus_width + focus_pad;
 582       rect->y += focus_width + focus_pad;
 583     }
 584
 585   rect->width = rect->height = expander_size;
 586 }
 587
 588 static void
 589 gtk_expander_size_allocate (GtkWidget     *widget,
 590                             GtkAllocation *allocation)
 591 {
 592   GtkExpander *expander;
 593   GtkBin *bin;
 594   GtkExpanderPrivate *priv;
 595   GtkRequisition child_requisition;
 596   gboolean child_visible = FALSE;
 597   gint border_width;
 598   gint expander_size;
 599   gint expander_spacing;
 600   gboolean interior_focus;
 601   gint focus_width;
 602   gint focus_pad;
 603   gint label_height;
 604
 605   expander = GTK_EXPANDER (widget);
 606   bin = GTK_BIN (widget);
 607   priv = expander->priv;
 608
 609   border_width = GTK_CONTAINER (widget)->border_width;
 610
 611   gtk_widget_style_get (widget,
 612                         "interior-focus", &interior_focus,
 613                         "focus-line-width", &focus_width,
 614                         "focus-padding", &focus_pad,
 615                         "expander-size", &expander_size,
 616                         "expander-spacing", &expander_spacing,
 617                         NULL);
 618
 619   child_requisition.width = 0;
 620   child_requisition.height = 0;
 621   if (bin->child && GTK_WIDGET_CHILD_VISIBLE (bin->child))
 622     {
 623       child_visible = TRUE;
 624       gtk_widget_get_child_requisition (bin->child, &child_requisition);
 625     }
 626
 627   widget->allocation = *allocation;
 628
 629   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 630     {
 631       GtkAllocation label_allocation;
 632       GtkRequisition label_requisition;
 633       gboolean ltr;
 634
 635       gtk_widget_get_child_requisition (priv->label_widget, &label_requisition);
 636
 637       ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
 638
 639       if (ltr)
 640         label_allocation.x = (widget->allocation.x +
 641                               border_width + focus_width + focus_pad +
 642                               expander_size + 2 * expander_spacing);
 643       else
 644         label_allocation.x = (widget->allocation.x + widget->allocation.width -
 645                               (label_requisition.width +
 646                                border_width + focus_width + focus_pad +
 647                                expander_size + 2 * expander_spacing));
 648
 649       label_allocation.y = widget->allocation.y + border_width + focus_width + focus_pad;
 650
 651       label_allocation.width = MIN (label_requisition.width,
 652                                     allocation->width - 2 * border_width -
 653                                     expander_size - 2 * expander_spacing -
 654                                     2 * focus_width - 2 * focus_pad);
 655       label_allocation.width = MAX (label_allocation.width, 1);
 656
 657       label_allocation.height = MIN (label_requisition.height,
 658                                      allocation->height - 2 * border_width -
 659                                      2 * focus_width - 2 * focus_pad -
 660                                      (child_visible ? priv->spacing : 0));
 661       label_allocation.height = MAX (label_allocation.height, 1);
 662
 663       gtk_widget_size_allocate (priv->label_widget, &label_allocation);
 664
 665       label_height = label_allocation.height;
 666     }
 667   else
 668     {
 669       label_height = 0;
 670     }
 671
 672   if (GTK_WIDGET_REALIZED (widget))
 673     {
 674       GdkRectangle rect;
 675
 676       get_expander_bounds (expander, &rect);
 677
 678       gdk_window_move_resize (priv->event_window,
 679                               allocation->x + border_width,
 680                               allocation->y + border_width,
 681                               MAX (allocation->width - 2 * border_width, 1),
 682                               MAX (rect.height, label_height - 2 * border_width));
 683     }
 684
 685   if (child_visible)
 686     {
 687       GtkAllocation child_allocation;
 688       gint top_height;
 689
 690       top_height = MAX (2 * expander_spacing + expander_size,
 691                         label_height +
 692                         (interior_focus ? 2 * focus_width + 2 * focus_pad : 0));
 693
 694       child_allocation.x = widget->allocation.x + border_width;
 695       child_allocation.y = widget->allocation.y + border_width + top_height + priv->spacing;
 696
 697       if (!interior_focus)
 698         child_allocation.y += 2 * focus_width + 2 * focus_pad;
 699
 700       child_allocation.width = MAX (allocation->width - 2 * border_width, 1);
 701
 702       child_allocation.height = allocation->height - top_height -
 703                                 2 * border_width - priv->spacing -
 704                                 (!interior_focus ? 2 * focus_width + 2 * focus_pad : 0);
 705       child_allocation.height = MAX (child_allocation.height, 1);
 706
 707       gtk_widget_size_allocate (bin->child, &child_allocation);
 708     }
 709 }
 710
 711 static void
 712 gtk_expander_map (GtkWidget *widget)
 713 {
 714   GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
 715
 716   if (priv->label_widget)
 717     gtk_widget_map (priv->label_widget);
 718
 719   GTK_WIDGET_CLASS (gtk_expander_parent_class)->map (widget);
 720
 721   if (priv->event_window)
 722     gdk_window_show (priv->event_window);
 723 }
 724
 725 static void
 726 gtk_expander_unmap (GtkWidget *widget)
 727 {
 728   GtkExpanderPrivate *priv = GTK_EXPANDER (widget)->priv;
 729
 730   if (priv->event_window)
 731     gdk_window_hide (priv->event_window);
 732
 733   GTK_WIDGET_CLASS (gtk_expander_parent_class)->unmap (widget);
 734
 735   if (priv->label_widget)
 736     gtk_widget_unmap (priv->label_widget);
 737 }
 738
 739 static void
 740 gtk_expander_paint_prelight (GtkExpander *expander)
 741 {
 742   GtkWidget *widget;
 743   GtkContainer *container;
 744   GtkExpanderPrivate *priv;
 745   GdkRectangle area;
 746   gboolean interior_focus;
 747   int focus_width;
 748   int focus_pad;
 749   int expander_size;
 750   int expander_spacing;
 751
 752   priv = expander->priv;
 753   widget = GTK_WIDGET (expander);
 754   container = GTK_CONTAINER (expander);
 755
 756   gtk_widget_style_get (widget,
 757                         "interior-focus", &interior_focus,
 758                         "focus-line-width", &focus_width,
 759                         "focus-padding", &focus_pad,
 760                         "expander-size", &expander_size,
 761                         "expander-spacing", &expander_spacing,
 762                         NULL);
 763
 764   area.x = widget->allocation.x + container->border_width;
 765   area.y = widget->allocation.y + container->border_width;
 766   area.width = widget->allocation.width - (2 * container->border_width);
 767
 768   if (priv->label_widget && gtk_widget_get_visible (priv->label_widget))
 769     area.height = priv->label_widget->allocation.height;
 770   else
 771     area.height = 0;
 772
 773   area.height += interior_focus ? (focus_width + focus_pad) * 2 : 0;
 774   area.height = MAX (area.height, expander_size + 2 * expander_spacing);
 775   area.height += !interior_focus ? (focus_width + focus_pad) * 2 : 0;
 776
 777   gtk_paint_flat_box (widget->style, widget->window,
 778                       GTK_STATE_PRELIGHT,
 779                       GTK_SHADOW_ETCHED_OUT,
 780                       &area, widget, "expander",
 781                       area.x, area.y,
 782                       area.width, area.height);
 783 }
 784
 785 static void
 786 gtk_expander_paint (GtkExpander *expander)
 787 {
 788   GtkWidget *widget;
 789   GdkRectangle clip;
 790   GtkStateType state;
 791
 792   widget = GTK_WIDGET (expander);
 793
 794   get_expander_bounds (expander, &clip);
 795
 796   state = widget->state;
 797   if (expander->priv->prelight)
 798     {
 799       state = GTK_STATE_PRELIGHT;
 800
 801       gtk_expander_paint_prelight (expander);
 802     }
 803
 804   gtk_paint_expander (widget->style,
 805                       widget->window,
 806                       state,
 807                       &clip,
 808                       widget,
 809                       "expander",
 810                       clip.x + clip.width / 2,
 811                       clip.y + clip.height / 2,
 812                       expander->priv->expander_style);
 813 }
 814
 815 static void
 816 gtk_expander_paint_focus (GtkExpander  *expander,
 817                           GdkRectangle *area)
 818 {
 819   GtkWidget *widget;
 820   GtkExpanderPrivate *priv;
 821   GdkRectangle rect;
 822   gint x, y, width, height;
 823   gboolean interior_focus;
 824   gint border_width;
 825   gint focus_width;
 826   gint focus_pad;
 827   gint expander_size;
 828   gint expander_spacing;
 829   gboolean ltr;
 830
 831   widget = GTK_WIDGET (expander);
 832   priv = expander->priv;
 833
 834   border_width = GTK_CONTAINER (widget)->border_width;
 835
 836   gtk_widget_style_get (widget,
 837                         "interior-focus", &interior_focus,
 838                         "focus-line-width", &focus_width,
 839                         "focus-padding", &focus_pad,
 840                         "expander-size", &expander_size,
 841                         "expander-spacing", &expander_spacing,
 842                         NULL);
 843
 844   ltr = gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL;
 845
 846   width = height = 0;
 847
 848   if (priv->label_widget)
 849     {
 850       if (gtk_widget_get_visible (priv->label_widget))
 851         {
 852           GtkAllocation label_allocation = priv->label_widget->allocation;
 853
 854           width  = label_allocation.width;
 855           height = label_allocation.height;
 856         }
 857
 858       width  += 2 * focus_pad + 2 * focus_width;
 859       height += 2 * focus_pad + 2 * focus_width;
 860
 861       x = widget->allocation.x + border_width;
 862       y = widget->allocation.y + border_width;
 863
 864       if (ltr)
 865         {
 866           if (interior_focus)
 867             x += expander_spacing * 2 + expander_size;
 868         }
 869       else
 870         {
 871           x += widget->allocation.width - 2 * border_width
 872             - expander_spacing * 2 - expander_size - width;
 873         }
 874
 875       if (!interior_focus)
 876         {
 877           width += expander_size + 2 * expander_spacing;
 878           height = MAX (height, expander_size + 2 * expander_spacing);
 879         }
 880     }
 881   else
 882     {
 883       get_expander_bounds (expander, &rect);
 884
 885       x = rect.x - focus_pad;
 886       y = rect.y - focus_pad;
 887       width = rect.width + 2 * focus_pad;
 888       height = rect.height + 2 * focus_pad;
 889     }
 890
 891   gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget),
 892                    area, widget, "expander",
 893                    x, y, width, height);
 894 }
 895
 896 static gboolean
 897 gtk_expander_expose (GtkWidget      *widget,
 898                      GdkEventExpose *event)
 899 {
 900   if (gtk_widget_is_drawable (widget))
 901     {
 902       GtkExpander *expander = GTK_EXPANDER (widget);
 903
 904       gtk_expander_paint (expander);
 905
 906       if (gtk_widget_has_focus (widget))
 907         gtk_expander_paint_focus (expander, &event->area);
 908
 909       GTK_WIDGET_CLASS (gtk_expander_parent_class)->expose_event (widget, event);
 910     }
 911
 912   return FALSE;
 913 }
 914
 915 static gboolean
 916 gtk_expander_button_press (GtkWidget      *widget,
 917                            GdkEventButton *event)
 918 {
 919   GtkExpander *expander = GTK_EXPANDER (widget);
 920
 921   if (event->button == 1 && event->window == expander->priv->event_window)
 922     {
 923       expander->priv->button_down = TRUE;
 924       return TRUE;
 925     }
 926
 927   return FALSE;
 928 }
 929
 930 static gboolean
 931 gtk_expander_button_release (GtkWidget      *widget,
 932                              GdkEventButton *event)
 933 {
 934   GtkExpander *expander = GTK_EXPANDER (widget);
 935
 936   if (event->button == 1 && expander->priv->button_down)
 937     {
 938       gtk_widget_activate (widget);
 939       expander->priv->button_down = FALSE;
 940       return TRUE;
 941     }
 942
 943   return FALSE;
 944 }
 945
 946 static void
 947 gtk_expander_grab_notify (GtkWidget *widget,
 948                           gboolean   was_grabbed)
 949 {
 950   if (!was_grabbed)
 951     GTK_EXPANDER (widget)->priv->button_down = FALSE;
 952 }
 953
 954 static void
 955 gtk_expander_state_changed (GtkWidget    *widget,
 956                             GtkStateType  previous_state)
 957 {
 958   if (!gtk_widget_is_sensitive (widget))
 959     GTK_EXPANDER (widget)->priv->button_down = FALSE;
 960 }
 961
 962 static void
 963 gtk_expander_redraw_expander (GtkExpander *expander)
 964 {
 965   GtkWidget *widget;
 966
 967   widget = GTK_WIDGET (expander);
 968
 969   if (GTK_WIDGET_REALIZED (widget))
 970     gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
 971 }
 972
 973 static gboolean
 974 gtk_expander_enter_notify (GtkWidget        *widget,
 975                            GdkEventCrossing *event)
 976 {
 977   GtkExpander *expander = GTK_EXPANDER (widget);
 978   GtkWidget *event_widget;
 979
 980   event_widget = gtk_get_event_widget ((GdkEvent *) event);
 981
 982   if (event_widget == widget &&
 983       event->detail != GDK_NOTIFY_INFERIOR)
 984     {
 985       expander->priv->prelight = TRUE;
 986
 987       if (expander->priv->label_widget)
 988         gtk_widget_set_state (expander->priv->label_widget, GTK_STATE_PRELIGHT);
 989
 990       gtk_expander_redraw_expander (expander);
 991     }
 992
 993   return FALSE;
 994 }
 995
 996 static gboolean
 997 gtk_expander_leave_notify (GtkWidget        *widget,
 998                            GdkEventCrossing *event)
 999 {
1000   GtkExpander *expander = GTK_EXPANDER (widget);
1001   GtkWidget *event_widget;
1002
1003   event_widget = gtk_get_event_widget ((GdkEvent *) event);
1004
1005   if (event_widget == widget &&
1006       event->detail != GDK_NOTIFY_INFERIOR)
1007     {
1008       expander->priv->prelight = FALSE;
1009
1010       if (expander->priv->label_widget)
1011         gtk_widget_set_state (expander->priv->label_widget, GTK_STATE_NORMAL);
1012
1013       gtk_expander_redraw_expander (expander);
1014     }
1015
1016   return FALSE;
1017 }
1018
1019 static gboolean
1020 expand_timeout (gpointer data)
1021 {
1022   GtkExpander *expander = GTK_EXPANDER (data);
1023   GtkExpanderPrivate *priv = expander->priv;
1024
1025   priv->expand_timer = 0;
1026   gtk_expander_set_expanded (expander, TRUE);
1027
1028   return FALSE;
1029 }
1030
1031 static gboolean
1032 gtk_expander_drag_motion (GtkWidget        *widget,
1033                           GdkDragContext   *context,
1034                           gint              x,
1035                           gint              y,
1036                           guint             time)
1037 {
1038   GtkExpander *expander = GTK_EXPANDER (widget);
1039   GtkExpanderPrivate *priv = expander->priv;
1040
1041   if (!priv->expanded && !priv->expand_timer)
1042     {
1043       GtkSettings *settings;
1044       guint timeout;
1045
1046       settings = gtk_widget_get_settings (widget);
1047       g_object_get (settings, "gtk-timeout-expand", &timeout, NULL);
1048
1049       priv->expand_timer = gdk_threads_add_timeout (timeout, (GSourceFunc) expand_timeout, expander);
1050     }
1051
1052   return TRUE;
1053 }
1054
1055 static void
1056 gtk_expander_drag_leave (GtkWidget      *widget,
1057                          GdkDragContext *context,
1058                          guint           time)
1059 {
1060   GtkExpander *expander = GTK_EXPANDER (widget);
1061   GtkExpanderPrivate *priv = expander->priv;
1062
1063   if (priv->expand_timer)
1064     {
1065       g_source_remove (priv->expand_timer);
1066       priv->expand_timer = 0;
1067     }
1068 }
1069
1070 typedef enum
1071 {
1072   FOCUS_NONE,
1073   FOCUS_WIDGET,
1074   FOCUS_LABEL,
1075   FOCUS_CHILD
1076 } FocusSite;
1077
1078 static gboolean
1079 focus_current_site (GtkExpander      *expander,
1080                     GtkDirectionType  direction)
1081 {
1082   GtkWidget *current_focus;
1083
1084   current_focus = GTK_CONTAINER (expander)->focus_child;
1085
1086   if (!current_focus)
1087     return FALSE;
1088
1089   return gtk_widget_child_focus (current_focus, direction);
1090 }
1091
1092 static gboolean
1093 focus_in_site (GtkExpander      *expander,
1094                FocusSite         site,
1095                GtkDirectionType  direction)
1096 {
1097   switch (site)
1098     {
1099     case FOCUS_WIDGET:
1100       gtk_widget_grab_focus (GTK_WIDGET (expander));
1101       return TRUE;
1102     case FOCUS_LABEL:
1103       if (expander->priv->label_widget)
1104         return gtk_widget_child_focus (expander->priv->label_widget, direction);
1105       else
1106         return FALSE;
1107     case FOCUS_CHILD:
1108       {
1109         GtkWidget *child = gtk_bin_get_child (GTK_BIN (expander));
1110
1111         if (child && GTK_WIDGET_CHILD_VISIBLE (child))
1112           return gtk_widget_child_focus (child, direction);
1113         else
1114           return FALSE;
1115       }
1116     case FOCUS_NONE:
1117       break;
1118     }
1119
1120   g_assert_not_reached ();
1121   return FALSE;
1122 }
1123
1124 static FocusSite
1125 get_next_site (GtkExpander      *expander,
1126                FocusSite         site,
1127                GtkDirectionType  direction)
1128 {
1129   gboolean ltr;
1130
1131   ltr = gtk_widget_get_direction (GTK_WIDGET (expander)) != GTK_TEXT_DIR_RTL;
1132
1133   switch (site)
1134     {
1135     case FOCUS_NONE:
1136       switch (direction)
1137         {
1138         case GTK_DIR_TAB_BACKWARD:
1139         case GTK_DIR_LEFT:
1140         case GTK_DIR_UP:
1141           return FOCUS_CHILD;
1142         case GTK_DIR_TAB_FORWARD:
1143         case GTK_DIR_DOWN:
1144         case GTK_DIR_RIGHT:
1145           return FOCUS_WIDGET;
1146         }
1147     case FOCUS_WIDGET:
1148       switch (direction)
1149         {
1150         case GTK_DIR_TAB_BACKWARD:
1151         case GTK_DIR_UP:
1152           return FOCUS_NONE;
1153         case GTK_DIR_LEFT:
1154           return ltr ? FOCUS_NONE : FOCUS_LABEL;
1155         case GTK_DIR_TAB_FORWARD:
1156         case GTK_DIR_DOWN:
1157           return FOCUS_LABEL;
1158         case GTK_DIR_RIGHT:
1159           return ltr ? FOCUS_LABEL : FOCUS_NONE;
1160           break;
1161         }
1162     case FOCUS_LABEL:
1163       switch (direction)
1164         {
1165         case GTK_DIR_TAB_BACKWARD:
1166         case GTK_DIR_UP:
1167           return FOCUS_WIDGET;
1168         case GTK_DIR_LEFT:
1169           return ltr ? FOCUS_WIDGET : FOCUS_CHILD;
1170         case GTK_DIR_TAB_FORWARD:
1171         case GTK_DIR_DOWN:
1172           return FOCUS_CHILD;
1173         case GTK_DIR_RIGHT:
1174           return ltr ? FOCUS_CHILD : FOCUS_WIDGET;
1175           break;
1176         }
1177     case FOCUS_CHILD:
1178       switch (direction)
1179         {
1180         case GTK_DIR_TAB_BACKWARD:
1181         case GTK_DIR_LEFT:
1182         case GTK_DIR_UP:
1183           return FOCUS_LABEL;
1184         case GTK_DIR_TAB_FORWARD:
1185         case GTK_DIR_DOWN:
1186         case GTK_DIR_RIGHT:
1187           return FOCUS_NONE;
1188         }
1189     }
1190
1191   g_assert_not_reached ();
1192   return FOCUS_NONE;
1193 }
1194
1195 static gboolean
1196 gtk_expander_focus (GtkWidget        *widget,
1197                     GtkDirectionType  direction)
1198 {
1199   GtkExpander *expander = GTK_EXPANDER (widget);
1200
1201   if (!focus_current_site (expander, direction))
1202     {
1203       GtkWidget *old_focus_child;
1204       gboolean widget_is_focus;
1205       FocusSite site = FOCUS_NONE;
1206
1207       widget_is_focus = gtk_widget_is_focus (widget);
1208       old_focus_child = GTK_CONTAINER (widget)->focus_child;
1209
1210       if (old_focus_child && old_focus_child == expander->priv->label_widget)
1211         site = FOCUS_LABEL;
1212       else if (old_focus_child)
1213         site = FOCUS_CHILD;
1214       else if (widget_is_focus)
1215         site = FOCUS_WIDGET;
1216
1217       while ((site = get_next_site (expander, site, direction)) != FOCUS_NONE)
1218         {
1219           if (focus_in_site (expander, site, direction))
1220             return TRUE;
1221         }
1222
1223       return FALSE;
1224     }
1225
1226   return TRUE;
1227 }
1228
1229 static void
1230 gtk_expander_add (GtkContainer *container,
1231                   GtkWidget    *widget)
1232 {
1233   GTK_CONTAINER_CLASS (gtk_expander_parent_class)->add (container, widget);
1234
1235   gtk_widget_set_child_visible (widget, GTK_EXPANDER (container)->priv->expanded);
1236   gtk_widget_queue_resize (GTK_WIDGET (container));
1237 }
1238
1239 static void
1240 gtk_expander_remove (GtkContainer *container,
1241                      GtkWidget    *widget)
1242 {
1243   GtkExpander *expander = GTK_EXPANDER (container);
1244
1245   if (GTK_EXPANDER (expander)->priv->label_widget == widget)
1246     gtk_expander_set_label_widget (expander, NULL);
1247   else
1248     GTK_CONTAINER_CLASS (gtk_expander_parent_class)->remove (container, widget);
1249 }
1250
1251 static void
1252 gtk_expander_forall (GtkContainer *container,
1253                      gboolean      include_internals,
1254                      GtkCallback   callback,
1255                      gpointer      callback_data)
1256 {
1257   GtkBin *bin = GTK_BIN (container);
1258   GtkExpanderPrivate *priv = GTK_EXPANDER (container)->priv;
1259
1260   if (bin->child)
1261     (* callback) (bin->child, callback_data);
1262
1263   if (priv->label_widget)
1264     (* callback) (priv->label_widget, callback_data);
1265 }
1266
1267 static void
1268 gtk_expander_activate (GtkExpander *expander)
1269 {
1270   gtk_expander_set_expanded (expander, !expander->priv->expanded);
1271 }
1272
1273 /**
1274  * gtk_expander_new:
1275  * @label: the text of the label
1276  *
1277  * Creates a new expander using @label as the text of the label.
1278  *
1279  * Return value: a new #GtkExpander widget.
1280  *
1281  * Since: 2.4
1282  **/
1283 GtkWidget *
1284 gtk_expander_new (const gchar *label)
1285 {
1286   return g_object_new (GTK_TYPE_EXPANDER, "label", label, NULL);
1287 }
1288
1289 /**
1290  * gtk_expander_new_with_mnemonic:
1291  * @label: (allow-none): the text of the label with an underscore in front of the
1292  *         mnemonic character
1293  *
1294  * Creates a new expander using @label as the text of the label.
1295  * If characters in @label are preceded by an underscore, they are underlined.
1296  * If you need a literal underscore character in a label, use '__' (two
1297  * underscores). The first underlined character represents a keyboard
1298  * accelerator called a mnemonic.
1299  * Pressing Alt and that key activates the button.
1300  *
1301  * Return value: a new #GtkExpander widget.
1302  *
1303  * Since: 2.4
1304  **/
1305 GtkWidget *
1306 gtk_expander_new_with_mnemonic (const gchar *label)
1307 {
1308   return g_object_new (GTK_TYPE_EXPANDER,
1309                        "label", label,
1310                        "use-underline", TRUE,
1311                        NULL);
1312 }
1313
1314 static gboolean
1315 gtk_expander_animation_timeout (GtkExpander *expander)
1316 {
1317   GtkExpanderPrivate *priv = expander->priv;
1318   GdkRectangle area;
1319   gboolean finish = FALSE;
1320
1321   if (GTK_WIDGET_REALIZED (expander))
1322     {
1323       get_expander_bounds (expander, &area);
1324       gdk_window_invalidate_rect (GTK_WIDGET (expander)->window, &area, TRUE);
1325     }
1326
1327   if (priv->expanded)
1328     {
1329       if (priv->expander_style == GTK_EXPANDER_COLLAPSED)
1330         {
1331           priv->expander_style = GTK_EXPANDER_SEMI_EXPANDED;
1332         }
1333       else
1334         {
1335           priv->expander_style = GTK_EXPANDER_EXPANDED;
1336           finish = TRUE;
1337         }
1338     }
1339   else
1340     {
1341       if (priv->expander_style == GTK_EXPANDER_EXPANDED)
1342         {
1343           priv->expander_style = GTK_EXPANDER_SEMI_COLLAPSED;
1344         }
1345       else
1346         {
1347           priv->expander_style = GTK_EXPANDER_COLLAPSED;
1348           finish = TRUE;
1349         }
1350     }
1351
1352   if (finish)
1353     {
1354       priv->animation_timeout = 0;
1355       if (GTK_BIN (expander)->child)
1356         gtk_widget_set_child_visible (GTK_BIN (expander)->child, priv->expanded);
1357       gtk_widget_queue_resize (GTK_WIDGET (expander));
1358     }
1359
1360   return !finish;
1361 }
1362
1363 static void
1364 gtk_expander_start_animation (GtkExpander *expander)
1365 {
1366   GtkExpanderPrivate *priv = expander->priv;
1367
1368   if (priv->animation_timeout)
1369     g_source_remove (priv->animation_timeout);
1370
1371   priv->animation_timeout =
1372                 gdk_threads_add_timeout (50,
1373                                (GSourceFunc) gtk_expander_animation_timeout,
1374                                expander);
1375 }
1376
1377 /**
1378  * gtk_expander_set_expanded:
1379  * @expander: a #GtkExpander
1380  * @expanded: whether the child widget is revealed
1381  *
1382  * Sets the state of the expander. Set to %TRUE, if you want
1383  * the child widget to be revealed, and %FALSE if you want the
1384  * child widget to be hidden.
1385  *
1386  * Since: 2.4
1387  **/
1388 void
1389 gtk_expander_set_expanded (GtkExpander *expander,
1390                            gboolean     expanded)
1391 {
1392   GtkExpanderPrivate *priv;
1393
1394   g_return_if_fail (GTK_IS_EXPANDER (expander));
1395
1396   priv = expander->priv;
1397
1398   expanded = expanded != FALSE;
1399
1400   if (priv->expanded != expanded)
1401     {
1402       GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (expander));
1403       gboolean     enable_animations;
1404
1405       priv->expanded = expanded;
1406
1407       g_object_get (settings, "gtk-enable-animations", &enable_animations, NULL);
1408
1409       if (enable_animations && GTK_WIDGET_REALIZED (expander))
1410         {
1411           gtk_expander_start_animation (expander);
1412         }
1413       else
1414         {
1415           priv->expander_style = expanded ? GTK_EXPANDER_EXPANDED :
1416                                             GTK_EXPANDER_COLLAPSED;
1417
1418           if (GTK_BIN (expander)->child)
1419             {
1420               gtk_widget_set_child_visible (GTK_BIN (expander)->child, priv->expanded);
1421               gtk_widget_queue_resize (GTK_WIDGET (expander));
1422             }
1423         }
1424
1425       g_object_notify (G_OBJECT (expander), "expanded");
1426     }
1427 }
1428
1429 /**
1430  * gtk_expander_get_expanded:
1431  * @expander:a #GtkExpander
1432  *
1433  * Queries a #GtkExpander and returns its current state. Returns %TRUE
1434  * if the child widget is revealed.
1435  *
1436  * See gtk_expander_set_expanded().
1437  *
1438  * Return value: the current state of the expander.
1439  *
1440  * Since: 2.4
1441  **/
1442 gboolean
1443 gtk_expander_get_expanded (GtkExpander *expander)
1444 {
1445   g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
1446
1447   return expander->priv->expanded;
1448 }
1449
1450 /**
1451  * gtk_expander_set_spacing:
1452  * @expander: a #GtkExpander
1453  * @spacing: distance between the expander and child in pixels.
1454  *
1455  * Sets the spacing field of @expander, which is the number of pixels to
1456  * place between expander and the child.
1457  *
1458  * Since: 2.4
1459  **/
1460 void
1461 gtk_expander_set_spacing (GtkExpander *expander,
1462                           gint         spacing)
1463 {
1464   g_return_if_fail (GTK_IS_EXPANDER (expander));
1465   g_return_if_fail (spacing >= 0);
1466
1467   if (expander->priv->spacing != spacing)
1468     {
1469       expander->priv->spacing = spacing;
1470
1471       gtk_widget_queue_resize (GTK_WIDGET (expander));
1472
1473       g_object_notify (G_OBJECT (expander), "spacing");
1474     }
1475 }
1476
1477 /**
1478  * gtk_expander_get_spacing:
1479  * @expander: a #GtkExpander
1480  *
1481  * Gets the value set by gtk_expander_set_spacing().
1482  *
1483  * Return value: spacing between the expander and child.
1484  *
1485  * Since: 2.4
1486  **/
1487 gint
1488 gtk_expander_get_spacing (GtkExpander *expander)
1489 {
1490   g_return_val_if_fail (GTK_IS_EXPANDER (expander), 0);
1491
1492   return expander->priv->spacing;
1493 }
1494
1495 /**
1496  * gtk_expander_set_label:
1497  * @expander: a #GtkExpander
1498  * @label: (allow-none): a string
1499  *
1500  * Sets the text of the label of the expander to @label.
1501  *
1502  * This will also clear any previously set labels.
1503  *
1504  * Since: 2.4
1505  **/
1506 void
1507 gtk_expander_set_label (GtkExpander *expander,
1508                         const gchar *label)
1509 {
1510   g_return_if_fail (GTK_IS_EXPANDER (expander));
1511
1512   if (!label)
1513     {
1514       gtk_expander_set_label_widget (expander, NULL);
1515     }
1516   else
1517     {
1518       GtkWidget *child;
1519
1520       child = gtk_label_new (label);
1521       gtk_label_set_use_underline (GTK_LABEL (child), expander->priv->use_underline);
1522       gtk_label_set_use_markup (GTK_LABEL (child), expander->priv->use_markup);
1523       gtk_widget_show (child);
1524
1525       gtk_expander_set_label_widget (expander, child);
1526     }
1527
1528   g_object_notify (G_OBJECT (expander), "label");
1529 }
1530
1531 /**
1532  * gtk_expander_get_label:
1533  * @expander: a #GtkExpander
1534  *
1535  * Fetches the text from a label widget including any embedded
1536  * underlines indicating mnemonics and Pango markup, as set by
1537  * gtk_expander_set_label(). If the label text has not been set the
1538  * return value will be %NULL. This will be the case if you create an
1539  * empty button with gtk_button_new() to use as a container.
1540  *
1541  * Note that this function behaved differently in versions prior to
1542  * 2.14 and used to return the label text stripped of embedded
1543  * underlines indicating mnemonics and Pango markup. This problem can
1544  * be avoided by fetching the label text directly from the label
1545  * widget.
1546  *
1547  * Return value: The text of the label widget. This string is owned
1548  * by the widget and must not be modified or freed.
1549  *
1550  * Since: 2.4
1551  **/
1552 G_CONST_RETURN char *
1553 gtk_expander_get_label (GtkExpander *expander)
1554 {
1555   GtkExpanderPrivate *priv;
1556
1557   g_return_val_if_fail (GTK_IS_EXPANDER (expander), NULL);
1558
1559   priv = expander->priv;
1560
1561   if (GTK_IS_LABEL (priv->label_widget))
1562     return gtk_label_get_label (GTK_LABEL (priv->label_widget));
1563   else
1564     return NULL;
1565 }
1566
1567 /**
1568  * gtk_expander_set_use_underline:
1569  * @expander: a #GtkExpander
1570  * @use_underline: %TRUE if underlines in the text indicate mnemonics
1571  *
1572  * If true, an underline in the text of the expander label indicates
1573  * the next character should be used for the mnemonic accelerator key.
1574  *
1575  * Since: 2.4
1576  **/
1577 void
1578 gtk_expander_set_use_underline (GtkExpander *expander,
1579                                 gboolean     use_underline)
1580 {
1581   GtkExpanderPrivate *priv;
1582
1583   g_return_if_fail (GTK_IS_EXPANDER (expander));
1584
1585   priv = expander->priv;
1586
1587   use_underline = use_underline != FALSE;
1588
1589   if (priv->use_underline != use_underline)
1590     {
1591       priv->use_underline = use_underline;
1592
1593       if (GTK_IS_LABEL (priv->label_widget))
1594         gtk_label_set_use_underline (GTK_LABEL (priv->label_widget), use_underline);
1595
1596       g_object_notify (G_OBJECT (expander), "use-underline");
1597     }
1598 }
1599
1600 /**
1601  * gtk_expander_get_use_underline:
1602  * @expander: a #GtkExpander
1603  *
1604  * Returns whether an embedded underline in the expander label indicates a
1605  * mnemonic. See gtk_expander_set_use_underline().
1606  *
1607  * Return value: %TRUE if an embedded underline in the expander label
1608  *               indicates the mnemonic accelerator keys.
1609  *
1610  * Since: 2.4
1611  **/
1612 gboolean
1613 gtk_expander_get_use_underline (GtkExpander *expander)
1614 {
1615   g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
1616
1617   return expander->priv->use_underline;
1618 }
1619
1620 /**
1621  * gtk_expander_set_use_markup:
1622  * @expander: a #GtkExpander
1623  * @use_markup: %TRUE if the label's text should be parsed for markup
1624  *
1625  * Sets whether the text of the label contains markup in <link
1626  * linkend="PangoMarkupFormat">Pango's text markup
1627  * language</link>. See gtk_label_set_markup().
1628  *
1629  * Since: 2.4
1630  **/
1631 void
1632 gtk_expander_set_use_markup (GtkExpander *expander,
1633                              gboolean     use_markup)
1634 {
1635   GtkExpanderPrivate *priv;
1636
1637   g_return_if_fail (GTK_IS_EXPANDER (expander));
1638
1639   priv = expander->priv;
1640
1641   use_markup = use_markup != FALSE;
1642
1643   if (priv->use_markup != use_markup)
1644     {
1645       priv->use_markup = use_markup;
1646
1647       if (GTK_IS_LABEL (priv->label_widget))
1648         gtk_label_set_use_markup (GTK_LABEL (priv->label_widget), use_markup);
1649
1650       g_object_notify (G_OBJECT (expander), "use-markup");
1651     }
1652 }
1653
1654 /**
1655  * gtk_expander_get_use_markup:
1656  * @expander: a #GtkExpander
1657  *
1658  * Returns whether the label's text is interpreted as marked up with
1659  * the <link linkend="PangoMarkupFormat">Pango text markup
1660  * language</link>. See gtk_expander_set_use_markup ().
1661  *
1662  * Return value: %TRUE if the label's text will be parsed for markup
1663  *
1664  * Since: 2.4
1665  **/
1666 gboolean
1667 gtk_expander_get_use_markup (GtkExpander *expander)
1668 {
1669   g_return_val_if_fail (GTK_IS_EXPANDER (expander), FALSE);
1670
1671   return expander->priv->use_markup;
1672 }
1673
1674 /**
1675  * gtk_expander_set_label_widget:
1676  * @expander: a #GtkExpander
1677  * @label_widget: (allow-none): the new label widget
1678  *
1679  * Set the label widget for the expander. This is the widget
1680  * that will appear embedded alongside the expander arrow.
1681  *
1682  * Since: 2.4
1683  **/
1684 void
1685 gtk_expander_set_label_widget (GtkExpander *expander,
1686                                GtkWidget   *label_widget)
1687 {
1688   GtkExpanderPrivate *priv;
1689   GtkWidget          *widget;
1690
1691   g_return_if_fail (GTK_IS_EXPANDER (expander));
1692   g_return_if_fail (label_widget == NULL || GTK_IS_WIDGET (label_widget));
1693   g_return_if_fail (label_widget == NULL || label_widget->parent == NULL);
1694
1695   priv = expander->priv;
1696
1697   if (priv->label_widget == label_widget)
1698     return;
1699
1700   if (priv->label_widget)
1701     {
1702       gtk_widget_set_state (priv->label_widget, GTK_STATE_NORMAL);
1703       gtk_widget_unparent (priv->label_widget);
1704     }
1705
1706   priv->label_widget = label_widget;
1707   widget = GTK_WIDGET (expander);
1708
1709   if (label_widget)
1710     {
1711       priv->label_widget = label_widget;
1712
1713       gtk_widget_set_parent (label_widget, widget);
1714
1715       if (priv->prelight)
1716         gtk_widget_set_state (label_widget, GTK_STATE_PRELIGHT);
1717     }
1718
1719   if (gtk_widget_get_visible (widget))
1720     gtk_widget_queue_resize (widget);
1721
1722   g_object_freeze_notify (G_OBJECT (expander));
1723   g_object_notify (G_OBJECT (expander), "label-widget");
1724   g_object_notify (G_OBJECT (expander), "label");
1725   g_object_thaw_notify (G_OBJECT (expander));
1726 }
1727
1728 /**
1729  * gtk_expander_get_label_widget:
1730  * @expander: a #GtkExpander
1731  *
1732  * Retrieves the label widget for the frame. See
1733  * gtk_expander_set_label_widget().
1734  *
1735  * Return value: the label widget, or %NULL if there is none.
1736  *
1737  * Since: 2.4
1738  **/
1739 GtkWidget *
1740 gtk_expander_get_label_widget (GtkExpander *expander)
1741 {
1742   g_return_val_if_fail (GTK_IS_EXPANDER (expander), NULL);
1743
1744   return expander->priv->label_widget;
1745 }
1746
1747 #define __GTK_EXPANDER_C__
1748 #include "gtkaliasdef.c"