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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <math.h>
  30
  31 #include "gtkbindings.h"
  32 #include "gtkmarshalers.h"
  33 #include "gtkscrollable.h"
  34 #include "gtkscrollbar.h"
  35 #include "gtkscrolledwindow.h"
  36 #include "gtkwindow.h"
  37 #include "gtkprivate.h"
  38 #include "gtktypebuiltins.h"
  39 #include "gtkintl.h"
  40 #include "a11y/gtkscrolledwindowaccessible.h"
  41
  42 /**
  43  * SECTION:gtkscrolledwindow
  44  * @Short_description: Adds scrollbars to its child widget
  45  * @Title: GtkScrolledWindow
  46  * @See_also: #GtkScrollable, #GtkViewport, #GtkAdjustment
  47  *
  48  * #GtkScrolledWindow is a #GtkBin subclass: it's a container
  49  * the accepts a single child widget. #GtkScrolledWindow adds scrollbars
  50  * to the child widget and optionally draws a beveled frame around the
  51  * child widget.
  52  *
  53  * The scrolled window can work in two ways. Some widgets have native
  54  * scrolling support; these widgets implement the #GtkScrollable interface.
  55  * Widgets with native scroll support include #GtkTreeView, #GtkTextView,
  56  * and #GtkLayout.
  57  *
  58  * For widgets that lack native scrolling support, the #GtkViewport
  59  * widget acts as an adaptor class, implementing scrollability for child
  60  * widgets that lack their own scrolling capabilities. Use #GtkViewport
  61  * to scroll child widgets such as #GtkGrid, #GtkBox, and so on.
  62  *
  63  * If a widget has native scrolling abilities, it can be added to the
  64  * #GtkScrolledWindow with gtk_container_add(). If a widget does not, you
  65  * must first add the widget to a #GtkViewport, then add the #GtkViewport
  66  * to the scrolled window. The convenience function
  67  * gtk_scrolled_window_add_with_viewport() does exactly this, so you can
  68  * ignore the presence of the viewport.
  69  *
  70  * The position of the scrollbars is controlled by the scroll
  71  * adjustments. See #GtkAdjustment for the fields in an adjustment - for
  72  * #GtkScrollbar, used by #GtkScrolledWindow, the "value" field
  73  * represents the position of the scrollbar, which must be between the
  74  * "lower" field and "upper - page_size." The "page_size" field
  75  * represents the size of the visible scrollable area. The
  76  * "step_increment" and "page_increment" fields are used when the user
  77  * asks to step down (using the small stepper arrows) or page down (using
  78  * for example the PageDown key).
  79  *
  80  * If a #GtkScrolledWindow doesn't behave quite as you would like, or
  81  * doesn't have exactly the right layout, it's very possible to set up
  82  * your own scrolling with #GtkScrollbar and for example a #GtkGrid.
  83  */
  84
  85
  86 /* scrolled window policy and size requisition handling:
  87  *
  88  * gtk size requisition works as follows:
  89  *   a widget upon size-request reports the width and height that it finds
  90  *   to be best suited to display its contents, including children.
  91  *   the width and/or height reported from a widget upon size requisition
  92  *   may be overidden by the user by specifying a width and/or height
  93  *   other than 0 through gtk_widget_set_size_request().
  94  *
  95  * a scrolled window needs (for implementing all three policy types) to
  96  * request its width and height based on two different rationales.
  97  * 1)   the user wants the scrolled window to just fit into the space
  98  *      that it gets allocated for a specifc dimension.
  99  * 1.1) this does not apply if the user specified a concrete value
 100  *      value for that specific dimension by either specifying usize for the
 101  *      scrolled window or for its child.
 102  * 2)   the user wants the scrolled window to take as much space up as
 103  *      is desired by the child for a specifc dimension (i.e. POLICY_NEVER).
 104  *
 105  * also, kinda obvious:
 106  * 3)   a user would certainly not have choosen a scrolled window as a container
 107  *      for the child, if the resulting allocation takes up more space than the
 108  *      child would have allocated without the scrolled window.
 109  *
 110  * conclusions:
 111  * A) from 1) follows: the scrolled window shouldn't request more space for a
 112  *    specifc dimension than is required at minimum.
 113  * B) from 1.1) follows: the requisition may be overidden by usize of the scrolled
 114  *    window (done automatically) or by usize of the child (needs to be checked).
 115  * C) from 2) follows: for POLICY_NEVER, the scrolled window simply reports the
 116  *    child's dimension.
 117  * D) from 3) follows: the scrolled window child's minimum width and minimum height
 118  *    under A) at least correspond to the space taken up by its scrollbars.
 119  */
 120
 121 #define DEFAULT_SCROLLBAR_SPACING  3
 122
 123 struct _GtkScrolledWindowPrivate
 124 {
 125   GtkWidget     *hscrollbar;
 126   GtkWidget     *vscrollbar;
 127
 128   GtkCornerType  real_window_placement;
 129   guint16  shadow_type;
 130
 131   guint    window_placement_set   : 1;
 132   guint    hscrollbar_policy      : 2;
 133   guint    vscrollbar_policy      : 2;
 134   guint    hscrollbar_visible     : 1;
 135   guint    vscrollbar_visible     : 1;
 136   guint    window_placement       : 2;
 137   guint    focus_out              : 1; /* Flag used by ::move-focus-out implementation */
 138
 139   gint     min_content_width;
 140   gint     min_content_height;
 141 };
 142
 143
 144 enum {
 145   PROP_0,
 146   PROP_HADJUSTMENT,
 147   PROP_VADJUSTMENT,
 148   PROP_HSCROLLBAR_POLICY,
 149   PROP_VSCROLLBAR_POLICY,
 150   PROP_WINDOW_PLACEMENT,
 151   PROP_WINDOW_PLACEMENT_SET,
 152   PROP_SHADOW_TYPE,
 153   PROP_MIN_CONTENT_WIDTH,
 154   PROP_MIN_CONTENT_HEIGHT
 155 };
 156
 157 /* Signals */
 158 enum
 159 {
 160   SCROLL_CHILD,
 161   MOVE_FOCUS_OUT,
 162   LAST_SIGNAL
 163 };
 164
 165 static void     gtk_scrolled_window_set_property       (GObject           *object,
 166                                                         guint              prop_id,
 167                                                         const GValue      *value,
 168                                                         GParamSpec        *pspec);
 169 static void     gtk_scrolled_window_get_property       (GObject           *object,
 170                                                         guint              prop_id,
 171                                                         GValue            *value,
 172                                                         GParamSpec        *pspec);
 173
 174 static void     gtk_scrolled_window_destroy            (GtkWidget         *widget);
 175 static void     gtk_scrolled_window_screen_changed     (GtkWidget         *widget,
 176                                                         GdkScreen         *previous_screen);
 177 static gboolean gtk_scrolled_window_draw               (GtkWidget         *widget,
 178                                                         cairo_t           *cr);
 179 static void     gtk_scrolled_window_size_allocate      (GtkWidget         *widget,
 180                                                         GtkAllocation     *allocation);
 181 static gboolean gtk_scrolled_window_scroll_event       (GtkWidget         *widget,
 182                                                         GdkEventScroll    *event);
 183 static gboolean gtk_scrolled_window_focus              (GtkWidget         *widget,
 184                                                         GtkDirectionType   direction);
 185 static void     gtk_scrolled_window_add                (GtkContainer      *container,
 186                                                         GtkWidget         *widget);
 187 static void     gtk_scrolled_window_remove             (GtkContainer      *container,
 188                                                         GtkWidget         *widget);
 189 static void     gtk_scrolled_window_forall             (GtkContainer      *container,
 190                                                         gboolean           include_internals,
 191                                                         GtkCallback        callback,
 192                                                         gpointer           callback_data);
 193 static gboolean gtk_scrolled_window_scroll_child       (GtkScrolledWindow *scrolled_window,
 194                                                         GtkScrollType      scroll,
 195                                                         gboolean           horizontal);
 196 static void     gtk_scrolled_window_move_focus_out     (GtkScrolledWindow *scrolled_window,
 197                                                         GtkDirectionType   direction_type);
 198
 199 static void     gtk_scrolled_window_relative_allocation(GtkWidget         *widget,
 200                                                         GtkAllocation     *allocation);
 201 static void     gtk_scrolled_window_adjustment_changed (GtkAdjustment     *adjustment,
 202                                                         gpointer           data);
 203
 204 static void  gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window);
 205
 206 static void  gtk_scrolled_window_get_preferred_width   (GtkWidget           *widget,
 207                                                         gint                *minimum_size,
 208                                                         gint                *natural_size);
 209 static void  gtk_scrolled_window_get_preferred_height  (GtkWidget           *widget,
 210                                                         gint                *minimum_size,
 211                                                         gint                *natural_size);
 212 static void  gtk_scrolled_window_get_preferred_height_for_width  (GtkWidget           *layout,
 213                                                         gint                 width,
 214                                                         gint                *minimum_height,
 215                                                         gint                *natural_height);
 216 static void  gtk_scrolled_window_get_preferred_width_for_height  (GtkWidget           *layout,
 217                                                         gint                 width,
 218                                                         gint                *minimum_height,
 219                                                         gint                *natural_height);
 220
 221 static guint signals[LAST_SIGNAL] = {0};
 222
 223 G_DEFINE_TYPE (GtkScrolledWindow, gtk_scrolled_window, GTK_TYPE_BIN)
 224
 225
 226 static void
 227 add_scroll_binding (GtkBindingSet  *binding_set,
 228                     guint           keyval,
 229                     GdkModifierType mask,
 230                     GtkScrollType   scroll,
 231                     gboolean        horizontal)
 232 {
 233   guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
 234
 235   gtk_binding_entry_add_signal (binding_set, keyval, mask,
 236                                 "scroll-child", 2,
 237                                 GTK_TYPE_SCROLL_TYPE, scroll,
 238                                 G_TYPE_BOOLEAN, horizontal);
 239   gtk_binding_entry_add_signal (binding_set, keypad_keyval, mask,
 240                                 "scroll-child", 2,
 241                                 GTK_TYPE_SCROLL_TYPE, scroll,
 242                                 G_TYPE_BOOLEAN, horizontal);
 243 }
 244
 245 static void
 246 add_tab_bindings (GtkBindingSet    *binding_set,
 247                   GdkModifierType   modifiers,
 248                   GtkDirectionType  direction)
 249 {
 250   gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, modifiers,
 251                                 "move-focus-out", 1,
 252                                 GTK_TYPE_DIRECTION_TYPE, direction);
 253   gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, modifiers,
 254                                 "move-focus-out", 1,
 255                                 GTK_TYPE_DIRECTION_TYPE, direction);
 256 }
 257
 258 static void
 259 gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
 260 {
 261   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 262   GtkWidgetClass *widget_class;
 263   GtkContainerClass *container_class;
 264   GtkBindingSet *binding_set;
 265
 266   widget_class = (GtkWidgetClass*) class;
 267   container_class = (GtkContainerClass*) class;
 268
 269   gobject_class->set_property = gtk_scrolled_window_set_property;
 270   gobject_class->get_property = gtk_scrolled_window_get_property;
 271
 272   widget_class->destroy = gtk_scrolled_window_destroy;
 273   widget_class->screen_changed = gtk_scrolled_window_screen_changed;
 274   widget_class->draw = gtk_scrolled_window_draw;
 275   widget_class->size_allocate = gtk_scrolled_window_size_allocate;
 276   widget_class->scroll_event = gtk_scrolled_window_scroll_event;
 277   widget_class->focus = gtk_scrolled_window_focus;
 278   widget_class->get_preferred_width = gtk_scrolled_window_get_preferred_width;
 279   widget_class->get_preferred_height = gtk_scrolled_window_get_preferred_height;
 280   widget_class->get_preferred_height_for_width = gtk_scrolled_window_get_preferred_height_for_width;
 281   widget_class->get_preferred_width_for_height = gtk_scrolled_window_get_preferred_width_for_height;
 282
 283   container_class->add = gtk_scrolled_window_add;
 284   container_class->remove = gtk_scrolled_window_remove;
 285   container_class->forall = gtk_scrolled_window_forall;
 286   gtk_container_class_handle_border_width (container_class);
 287
 288   class->scrollbar_spacing = -1;
 289
 290   class->scroll_child = gtk_scrolled_window_scroll_child;
 291   class->move_focus_out = gtk_scrolled_window_move_focus_out;
 292
 293   g_object_class_install_property (gobject_class,
 294                                    PROP_HADJUSTMENT,
 295                                    g_param_spec_object ("hadjustment",
 296                                                         P_("Horizontal Adjustment"),
 297                                                         P_("The GtkAdjustment for the horizontal position"),
 298                                                         GTK_TYPE_ADJUSTMENT,
 299                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 300   g_object_class_install_property (gobject_class,
 301                                    PROP_VADJUSTMENT,
 302                                    g_param_spec_object ("vadjustment",
 303                                                         P_("Vertical Adjustment"),
 304                                                         P_("The GtkAdjustment for the vertical position"),
 305                                                         GTK_TYPE_ADJUSTMENT,
 306                                                         GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 307   g_object_class_install_property (gobject_class,
 308                                    PROP_HSCROLLBAR_POLICY,
 309                                    g_param_spec_enum ("hscrollbar-policy",
 310                                                       P_("Horizontal Scrollbar Policy"),
 311                                                       P_("When the horizontal scrollbar is displayed"),
 312                                                       GTK_TYPE_POLICY_TYPE,
 313                                                       GTK_POLICY_AUTOMATIC,
 314                                                       GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
 315   g_object_class_install_property (gobject_class,
 316                                    PROP_VSCROLLBAR_POLICY,
 317                                    g_param_spec_enum ("vscrollbar-policy",
 318                                                       P_("Vertical Scrollbar Policy"),
 319                                                       P_("When the vertical scrollbar is displayed"),
 320                                                       GTK_TYPE_POLICY_TYPE,
 321                                                       GTK_POLICY_AUTOMATIC,
 322                                                       GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
 323
 324   g_object_class_install_property (gobject_class,
 325                                    PROP_WINDOW_PLACEMENT,
 326                                    g_param_spec_enum ("window-placement",
 327                                                       P_("Window Placement"),
 328                                                       P_("Where the contents are located with respect to the scrollbars. This property only takes effect if \"window-placement-set\" is TRUE."),
 329                                                       GTK_TYPE_CORNER_TYPE,
 330                                                       GTK_CORNER_TOP_LEFT,
 331                                                       GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
 332
 333   /**
 334    * GtkScrolledWindow:window-placement-set:
 335    *
 336    * Whether "window-placement" should be used to determine the location
 337    * of the contents with respect to the scrollbars. Otherwise, the
 338    * "gtk-scrolled-window-placement" setting is used.
 339    *
 340    * Since: 2.10
 341    */
 342   g_object_class_install_property (gobject_class,
 343                                    PROP_WINDOW_PLACEMENT_SET,
 344                                    g_param_spec_boolean ("window-placement-set",
 345                                                          P_("Window Placement Set"),
 346                                                          P_("Whether \"window-placement\" should be used to determine the location of the contents with respect to the scrollbars."),
 347                                                          FALSE,
 348                                                          GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
 349   g_object_class_install_property (gobject_class,
 350                                    PROP_SHADOW_TYPE,
 351                                    g_param_spec_enum ("shadow-type",
 352                                                       P_("Shadow Type"),
 353                                                       P_("Style of bevel around the contents"),
 354                                                       GTK_TYPE_SHADOW_TYPE,
 355                                                       GTK_SHADOW_NONE,
 356                                                       GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
 357
 358   /**
 359    * GtkScrolledWindow:scrollbars-within-bevel:
 360    *
 361    * Whether to place scrollbars within the scrolled window's bevel.
 362    *
 363    * Since: 2.12
 364    */
 365   gtk_widget_class_install_style_property (widget_class,
 366                                            g_param_spec_boolean ("scrollbars-within-bevel",
 367                                                                  P_("Scrollbars within bevel"),
 368                                                                  P_("Place scrollbars within the scrolled window's bevel"),
 369                                                                  FALSE,
 370                                                                  GTK_PARAM_READABLE));
 371
 372   gtk_widget_class_install_style_property (widget_class,
 373                                            g_param_spec_int ("scrollbar-spacing",
 374                                                              P_("Scrollbar spacing"),
 375                                                              P_("Number of pixels between the scrollbars and the scrolled window"),
 376                                                              0,
 377                                                              G_MAXINT,
 378                                                              DEFAULT_SCROLLBAR_SPACING,
 379                                                              GTK_PARAM_READABLE));
 380
 381   /**
 382    * GtkScrolledWindow:min-content-width:
 383    *
 384    * The minimum content width of @scrolled_window, or -1 if not set.
 385    *
 386    * Since: 3.0
 387    */
 388   g_object_class_install_property (gobject_class,
 389                                    PROP_MIN_CONTENT_WIDTH,
 390                                    g_param_spec_int ("min-content-width",
 391                                                      P_("Minimum Content Width"),
 392                                                      P_("The minimum width that the scrolled window will allocate to its content"),
 393                                                      -1, G_MAXINT, -1,
 394                                                      GTK_PARAM_READWRITE));
 395
 396   /**
 397    * GtkScrolledWindow:min-content-height:
 398    *
 399    * The minimum content height of @scrolled_window, or -1 if not set.
 400    *
 401    * Since: 3.0
 402    */
 403   g_object_class_install_property (gobject_class,
 404                                    PROP_MIN_CONTENT_HEIGHT,
 405                                    g_param_spec_int ("min-content-height",
 406                                                      P_("Minimum Content Height"),
 407                                                      P_("The minimum height that the scrolled window will allocate to its content"),
 408                                                      -1, G_MAXINT, -1,
 409                                                      GTK_PARAM_READWRITE));
 410   /**
 411    * GtkScrolledWindow::scroll-child:
 412    * @scrolled_window: a #GtkScrolledWindow
 413    * @scroll: a #GtkScrollType describing how much to scroll
 414    * @horizontal: whether the keybinding scrolls the child
 415    *   horizontally or not
 416    *
 417    * The ::scroll-child signal is a
 418    * <link linkend="keybinding-signals">keybinding signal</link>
 419    * which gets emitted when a keybinding that scrolls is pressed.
 420    * The horizontal or vertical adjustment is updated which triggers a
 421    * signal that the scrolled windows child may listen to and scroll itself.
 422    */
 423   signals[SCROLL_CHILD] =
 424     g_signal_new (I_("scroll-child"),
 425                   G_TYPE_FROM_CLASS (gobject_class),
 426                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 427                   G_STRUCT_OFFSET (GtkScrolledWindowClass, scroll_child),
 428                   NULL, NULL,
 429                   _gtk_marshal_BOOLEAN__ENUM_BOOLEAN,
 430                   G_TYPE_BOOLEAN, 2,
 431                   GTK_TYPE_SCROLL_TYPE,
 432                   G_TYPE_BOOLEAN);
 433
 434   /**
 435    * GtkScrolledWindow::move-focus-out:
 436    * @scrolled_window: a #GtkScrolledWindow
 437    * @direction_type: either %GTK_DIR_TAB_FORWARD or
 438    *   %GTK_DIR_TAB_BACKWARD
 439    *
 440    * The ::move-focus-out signal is a
 441    * <link linkend="keybinding-signals">keybinding signal</link>
 442    * which gets emitted when focus is moved away from the scrolled
 443    * window by a keybinding.
 444    * The #GtkWidget::move-focus signal is emitted with @direction_type
 445    * on this scrolled windows toplevel parent in the container hierarchy.
 446    * The default bindings for this signal are
 447    * <keycombo><keycap>Tab</keycap><keycap>Ctrl</keycap></keycombo>
 448    * and
 449    * <keycombo><keycap>Tab</keycap><keycap>Ctrl</keycap><keycap>Shift</keycap></keycombo>.
 450    */
 451   signals[MOVE_FOCUS_OUT] =
 452     g_signal_new (I_("move-focus-out"),
 453                   G_TYPE_FROM_CLASS (gobject_class),
 454                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 455                   G_STRUCT_OFFSET (GtkScrolledWindowClass, move_focus_out),
 456                   NULL, NULL,
 457                   _gtk_marshal_VOID__ENUM,
 458                   G_TYPE_NONE, 1,
 459                   GTK_TYPE_DIRECTION_TYPE);
 460
 461   binding_set = gtk_binding_set_by_class (class);
 462
 463   add_scroll_binding (binding_set, GDK_KEY_Left,  GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, TRUE);
 464   add_scroll_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD,  TRUE);
 465   add_scroll_binding (binding_set, GDK_KEY_Up,    GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, FALSE);
 466   add_scroll_binding (binding_set, GDK_KEY_Down,  GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD,  FALSE);
 467
 468   add_scroll_binding (binding_set, GDK_KEY_Page_Up,   GDK_CONTROL_MASK, GTK_SCROLL_PAGE_BACKWARD, TRUE);
 469   add_scroll_binding (binding_set, GDK_KEY_Page_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_FORWARD,  TRUE);
 470   add_scroll_binding (binding_set, GDK_KEY_Page_Up,   0,                GTK_SCROLL_PAGE_BACKWARD, FALSE);
 471   add_scroll_binding (binding_set, GDK_KEY_Page_Down, 0,                GTK_SCROLL_PAGE_FORWARD,  FALSE);
 472
 473   add_scroll_binding (binding_set, GDK_KEY_Home, GDK_CONTROL_MASK, GTK_SCROLL_START, TRUE);
 474   add_scroll_binding (binding_set, GDK_KEY_End,  GDK_CONTROL_MASK, GTK_SCROLL_END,   TRUE);
 475   add_scroll_binding (binding_set, GDK_KEY_Home, 0,                GTK_SCROLL_START, FALSE);
 476   add_scroll_binding (binding_set, GDK_KEY_End,  0,                GTK_SCROLL_END,   FALSE);
 477
 478   add_tab_bindings (binding_set, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD);
 479   add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
 480
 481   g_type_class_add_private (class, sizeof (GtkScrolledWindowPrivate));
 482
 483   gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCROLLED_WINDOW_ACCESSIBLE);
 484 }
 485
 486 static void
 487 gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
 488 {
 489   GtkScrolledWindowPrivate *priv;
 490
 491   scrolled_window->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (scrolled_window,
 492                                                               GTK_TYPE_SCROLLED_WINDOW,
 493                                                               GtkScrolledWindowPrivate);
 494
 495   gtk_widget_set_has_window (GTK_WIDGET (scrolled_window), FALSE);
 496   gtk_widget_set_can_focus (GTK_WIDGET (scrolled_window), TRUE);
 497
 498   priv->hscrollbar = NULL;
 499   priv->vscrollbar = NULL;
 500   priv->hscrollbar_policy = GTK_POLICY_AUTOMATIC;
 501   priv->vscrollbar_policy = GTK_POLICY_AUTOMATIC;
 502   priv->hscrollbar_visible = FALSE;
 503   priv->vscrollbar_visible = FALSE;
 504   priv->focus_out = FALSE;
 505   priv->window_placement = GTK_CORNER_TOP_LEFT;
 506   gtk_scrolled_window_update_real_placement (scrolled_window);
 507   priv->min_content_width = -1;
 508   priv->min_content_height = -1;
 509 }
 510
 511 /**
 512  * gtk_scrolled_window_new:
 513  * @hadjustment: (allow-none): horizontal adjustment
 514  * @vadjustment: (allow-none): vertical adjustment
 515  *
 516  * Creates a new scrolled window.
 517  *
 518  * The two arguments are the scrolled window's adjustments; these will be
 519  * shared with the scrollbars and the child widget to keep the bars in sync
 520  * with the child. Usually you want to pass %NULL for the adjustments, which
 521  * will cause the scrolled window to create them for you.
 522  *
 523  * Returns: a new scrolled window
 524  */
 525 GtkWidget*
 526 gtk_scrolled_window_new (GtkAdjustment *hadjustment,
 527                          GtkAdjustment *vadjustment)
 528 {
 529   GtkWidget *scrolled_window;
 530
 531   if (hadjustment)
 532     g_return_val_if_fail (GTK_IS_ADJUSTMENT (hadjustment), NULL);
 533
 534   if (vadjustment)
 535     g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadjustment), NULL);
 536
 537   scrolled_window = g_object_new (GTK_TYPE_SCROLLED_WINDOW,
 538                                     "hadjustment", hadjustment,
 539                                     "vadjustment", vadjustment,
 540                                     NULL);
 541
 542   return scrolled_window;
 543 }
 544
 545 /**
 546  * gtk_scrolled_window_set_hadjustment:
 547  * @scrolled_window: a #GtkScrolledWindow
 548  * @hadjustment: horizontal scroll adjustment
 549  *
 550  * Sets the #GtkAdjustment for the horizontal scrollbar.
 551  */
 552 void
 553 gtk_scrolled_window_set_hadjustment (GtkScrolledWindow *scrolled_window,
 554                                      GtkAdjustment     *hadjustment)
 555 {
 556   GtkScrolledWindowPrivate *priv;
 557   GtkBin *bin;
 558   GtkWidget *child;
 559
 560   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
 561   if (hadjustment)
 562     g_return_if_fail (GTK_IS_ADJUSTMENT (hadjustment));
 563   else
 564     hadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
 565
 566   bin = GTK_BIN (scrolled_window);
 567   priv = scrolled_window->priv;
 568
 569   if (!priv->hscrollbar)
 570     {
 571       gtk_widget_push_composite_child ();
 572       priv->hscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_HORIZONTAL, hadjustment);
 573       gtk_widget_set_composite_name (priv->hscrollbar, "hscrollbar");
 574       gtk_widget_pop_composite_child ();
 575
 576       gtk_widget_set_parent (priv->hscrollbar, GTK_WIDGET (scrolled_window));
 577       g_object_ref (priv->hscrollbar);
 578       gtk_widget_show (priv->hscrollbar);
 579     }
 580   else
 581     {
 582       GtkAdjustment *old_adjustment;
 583
 584       old_adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
 585       if (old_adjustment == hadjustment)
 586         return;
 587
 588       g_signal_handlers_disconnect_by_func (old_adjustment,
 589                                             gtk_scrolled_window_adjustment_changed,
 590                                             scrolled_window);
 591       gtk_range_set_adjustment (GTK_RANGE (priv->hscrollbar),
 592                                 hadjustment);
 593     }
 594   hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
 595   g_signal_connect (hadjustment,
 596                     "changed",
 597                     G_CALLBACK (gtk_scrolled_window_adjustment_changed),
 598                     scrolled_window);
 599   gtk_scrolled_window_adjustment_changed (hadjustment, scrolled_window);
 600
 601   child = gtk_bin_get_child (bin);
 602   if (GTK_IS_SCROLLABLE (child))
 603     gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (child), hadjustment);
 604
 605   g_object_notify (G_OBJECT (scrolled_window), "hadjustment");
 606 }
 607
 608 /**
 609  * gtk_scrolled_window_set_vadjustment:
 610  * @scrolled_window: a #GtkScrolledWindow
 611  * @vadjustment: vertical scroll adjustment
 612  *
 613  * Sets the #GtkAdjustment for the vertical scrollbar.
 614  */
 615 void
 616 gtk_scrolled_window_set_vadjustment (GtkScrolledWindow *scrolled_window,
 617                                      GtkAdjustment     *vadjustment)
 618 {
 619   GtkScrolledWindowPrivate *priv;
 620   GtkBin *bin;
 621   GtkWidget *child;
 622
 623   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
 624   if (vadjustment)
 625     g_return_if_fail (GTK_IS_ADJUSTMENT (vadjustment));
 626   else
 627     vadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
 628
 629   bin = GTK_BIN (scrolled_window);
 630   priv = scrolled_window->priv;
 631
 632   if (!priv->vscrollbar)
 633     {
 634       gtk_widget_push_composite_child ();
 635       priv->vscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, vadjustment);
 636       gtk_widget_set_composite_name (priv->vscrollbar, "vscrollbar");
 637       gtk_widget_pop_composite_child ();
 638
 639       gtk_widget_set_parent (priv->vscrollbar, GTK_WIDGET (scrolled_window));
 640       g_object_ref (priv->vscrollbar);
 641       gtk_widget_show (priv->vscrollbar);
 642     }
 643   else
 644     {
 645       GtkAdjustment *old_adjustment;
 646
 647       old_adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
 648       if (old_adjustment == vadjustment)
 649         return;
 650
 651       g_signal_handlers_disconnect_by_func (old_adjustment,
 652                                             gtk_scrolled_window_adjustment_changed,
 653                                             scrolled_window);
 654       gtk_range_set_adjustment (GTK_RANGE (priv->vscrollbar),
 655                                 vadjustment);
 656     }
 657   vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
 658   g_signal_connect (vadjustment,
 659                     "changed",
 660                     G_CALLBACK (gtk_scrolled_window_adjustment_changed),
 661                     scrolled_window);
 662   gtk_scrolled_window_adjustment_changed (vadjustment, scrolled_window);
 663
 664   child = gtk_bin_get_child (bin);
 665   if (GTK_IS_SCROLLABLE (child))
 666     gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (child), vadjustment);
 667
 668   g_object_notify (G_OBJECT (scrolled_window), "vadjustment");
 669 }
 670
 671 /**
 672  * gtk_scrolled_window_get_hadjustment:
 673  * @scrolled_window: a #GtkScrolledWindow
 674  *
 675  * Returns the horizontal scrollbar's adjustment, used to connect the
 676  * horizontal scrollbar to the child widget's horizontal scroll
 677  * functionality.
 678  *
 679  * Returns: (transfer none): the horizontal #GtkAdjustment
 680  */
 681 GtkAdjustment*
 682 gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window)
 683 {
 684   GtkScrolledWindowPrivate *priv;
 685
 686   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
 687
 688   priv = scrolled_window->priv;
 689
 690   return (priv->hscrollbar ?
 691           gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)) :
 692           NULL);
 693 }
 694
 695 /**
 696  * gtk_scrolled_window_get_vadjustment:
 697  * @scrolled_window: a #GtkScrolledWindow
 698  *
 699  * Returns the vertical scrollbar's adjustment, used to connect the
 700  * vertical scrollbar to the child widget's vertical scroll functionality.
 701  *
 702  * Returns: (transfer none): the vertical #GtkAdjustment
 703  */
 704 GtkAdjustment*
 705 gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window)
 706 {
 707   GtkScrolledWindowPrivate *priv;
 708
 709   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
 710
 711   priv = scrolled_window->priv;
 712
 713   return (priv->vscrollbar ?
 714           gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)) :
 715           NULL);
 716 }
 717
 718 /**
 719  * gtk_scrolled_window_get_hscrollbar:
 720  * @scrolled_window: a #GtkScrolledWindow
 721  *
 722  * Returns the horizontal scrollbar of @scrolled_window.
 723  *
 724  * Returns: (transfer none): the horizontal scrollbar of the scrolled window,
 725  *     or %NULL if it does not have one.
 726  *
 727  * Since: 2.8
 728  */
 729 GtkWidget*
 730 gtk_scrolled_window_get_hscrollbar (GtkScrolledWindow *scrolled_window)
 731 {
 732   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
 733
 734   return scrolled_window->priv->hscrollbar;
 735 }
 736
 737 /**
 738  * gtk_scrolled_window_get_vscrollbar:
 739  * @scrolled_window: a #GtkScrolledWindow
 740  *
 741  * Returns the vertical scrollbar of @scrolled_window.
 742  *
 743  * Returns: (transfer none): the vertical scrollbar of the scrolled window,
 744  *     or %NULL if it does not have one.
 745  *
 746  * Since: 2.8
 747  */
 748 GtkWidget*
 749 gtk_scrolled_window_get_vscrollbar (GtkScrolledWindow *scrolled_window)
 750 {
 751   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
 752
 753   return scrolled_window->priv->vscrollbar;
 754 }
 755
 756 /**
 757  * gtk_scrolled_window_set_policy:
 758  * @scrolled_window: a #GtkScrolledWindow
 759  * @hscrollbar_policy: policy for horizontal bar
 760  * @vscrollbar_policy: policy for vertical bar
 761  *
 762  * Sets the scrollbar policy for the horizontal and vertical scrollbars.
 763  *
 764  * The policy determines when the scrollbar should appear; it is a value
 765  * from the #GtkPolicyType enumeration. If %GTK_POLICY_ALWAYS, the
 766  * scrollbar is always present; if %GTK_POLICY_NEVER, the scrollbar is
 767  * never present; if %GTK_POLICY_AUTOMATIC, the scrollbar is present only
 768  * if needed (that is, if the slider part of the bar would be smaller
 769  * than the trough - the display is larger than the page size).
 770  */
 771 void
 772 gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window,
 773                                 GtkPolicyType      hscrollbar_policy,
 774                                 GtkPolicyType      vscrollbar_policy)
 775 {
 776   GtkScrolledWindowPrivate *priv;
 777   GObject *object = G_OBJECT (scrolled_window);
 778
 779   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
 780
 781   priv = scrolled_window->priv;
 782
 783   if ((priv->hscrollbar_policy != hscrollbar_policy) ||
 784       (priv->vscrollbar_policy != vscrollbar_policy))
 785     {
 786       priv->hscrollbar_policy = hscrollbar_policy;
 787       priv->vscrollbar_policy = vscrollbar_policy;
 788
 789       gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
 790
 791       g_object_freeze_notify (object);
 792       g_object_notify (object, "hscrollbar-policy");
 793       g_object_notify (object, "vscrollbar-policy");
 794       g_object_thaw_notify (object);
 795     }
 796 }
 797
 798 /**
 799  * gtk_scrolled_window_get_policy:
 800  * @scrolled_window: a #GtkScrolledWindow
 801  * @hscrollbar_policy: (out) (allow-none): location to store the policy
 802  *     for the horizontal scrollbar, or %NULL.
 803  * @vscrollbar_policy: (out) (allow-none): location to store the policy
 804  *     for the vertical scrollbar, or %NULL.
 805  *
 806  * Retrieves the current policy values for the horizontal and vertical
 807  * scrollbars. See gtk_scrolled_window_set_policy().
 808  */
 809 void
 810 gtk_scrolled_window_get_policy (GtkScrolledWindow *scrolled_window,
 811                                 GtkPolicyType     *hscrollbar_policy,
 812                                 GtkPolicyType     *vscrollbar_policy)
 813 {
 814   GtkScrolledWindowPrivate *priv;
 815
 816   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
 817
 818   priv = scrolled_window->priv;
 819
 820   if (hscrollbar_policy)
 821     *hscrollbar_policy = priv->hscrollbar_policy;
 822   if (vscrollbar_policy)
 823     *vscrollbar_policy = priv->vscrollbar_policy;
 824 }
 825
 826 static void
 827 gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window)
 828 {
 829   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
 830   GtkSettings *settings;
 831
 832   settings = gtk_widget_get_settings (GTK_WIDGET (scrolled_window));
 833
 834   if (priv->window_placement_set || settings == NULL)
 835     priv->real_window_placement = priv->window_placement;
 836   else
 837     g_object_get (settings,
 838                   "gtk-scrolled-window-placement",
 839                   &priv->real_window_placement,
 840                   NULL);
 841 }
 842
 843 static void
 844 gtk_scrolled_window_set_placement_internal (GtkScrolledWindow *scrolled_window,
 845                                             GtkCornerType      window_placement)
 846 {
 847   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
 848
 849   if (priv->window_placement != window_placement)
 850     {
 851       priv->window_placement = window_placement;
 852
 853       gtk_scrolled_window_update_real_placement (scrolled_window);
 854       gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
 855
 856       g_object_notify (G_OBJECT (scrolled_window), "window-placement");
 857     }
 858 }
 859
 860 static void
 861 gtk_scrolled_window_set_placement_set (GtkScrolledWindow *scrolled_window,
 862                                        gboolean           placement_set,
 863                                        gboolean           emit_resize)
 864 {
 865   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
 866
 867   if (priv->window_placement_set != placement_set)
 868     {
 869       priv->window_placement_set = placement_set;
 870
 871       gtk_scrolled_window_update_real_placement (scrolled_window);
 872       if (emit_resize)
 873         gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
 874
 875       g_object_notify (G_OBJECT (scrolled_window), "window-placement-set");
 876     }
 877 }
 878
 879 /**
 880  * gtk_scrolled_window_set_placement:
 881  * @scrolled_window: a #GtkScrolledWindow
 882  * @window_placement: position of the child window
 883  *
 884  * Sets the placement of the contents with respect to the scrollbars
 885  * for the scrolled window.
 886  *
 887  * The default is %GTK_CORNER_TOP_LEFT, meaning the child is
 888  * in the top left, with the scrollbars underneath and to the right.
 889  * Other values in #GtkCornerType are %GTK_CORNER_TOP_RIGHT,
 890  * %GTK_CORNER_BOTTOM_LEFT, and %GTK_CORNER_BOTTOM_RIGHT.
 891  *
 892  * See also gtk_scrolled_window_get_placement() and
 893  * gtk_scrolled_window_unset_placement().
 894  */
 895 void
 896 gtk_scrolled_window_set_placement (GtkScrolledWindow *scrolled_window,
 897                                    GtkCornerType      window_placement)
 898 {
 899   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
 900
 901   gtk_scrolled_window_set_placement_set (scrolled_window, TRUE, FALSE);
 902   gtk_scrolled_window_set_placement_internal (scrolled_window, window_placement);
 903 }
 904
 905 /**
 906  * gtk_scrolled_window_get_placement:
 907  * @scrolled_window: a #GtkScrolledWindow
 908  *
 909  * Gets the placement of the contents with respect to the scrollbars
 910  * for the scrolled window. See gtk_scrolled_window_set_placement().
 911  *
 912  * Return value: the current placement value.
 913  *
 914  * See also gtk_scrolled_window_set_placement() and
 915  * gtk_scrolled_window_unset_placement().
 916  **/
 917 GtkCornerType
 918 gtk_scrolled_window_get_placement (GtkScrolledWindow *scrolled_window)
 919 {
 920   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_CORNER_TOP_LEFT);
 921
 922   return scrolled_window->priv->window_placement;
 923 }
 924
 925 /**
 926  * gtk_scrolled_window_unset_placement:
 927  * @scrolled_window: a #GtkScrolledWindow
 928  *
 929  * Unsets the placement of the contents with respect to the scrollbars
 930  * for the scrolled window. If no window placement is set for a scrolled
 931  * window, it obeys the "gtk-scrolled-window-placement" XSETTING.
 932  *
 933  * See also gtk_scrolled_window_set_placement() and
 934  * gtk_scrolled_window_get_placement().
 935  *
 936  * Since: 2.10
 937  **/
 938 void
 939 gtk_scrolled_window_unset_placement (GtkScrolledWindow *scrolled_window)
 940 {
 941   GtkScrolledWindowPrivate *priv;
 942
 943   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
 944
 945   priv = scrolled_window->priv;
 946
 947   if (priv->window_placement_set)
 948     {
 949       priv->window_placement_set = FALSE;
 950
 951       gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
 952
 953       g_object_notify (G_OBJECT (scrolled_window), "window-placement-set");
 954     }
 955 }
 956
 957 /**
 958  * gtk_scrolled_window_set_shadow_type:
 959  * @scrolled_window: a #GtkScrolledWindow
 960  * @type: kind of shadow to draw around scrolled window contents
 961  *
 962  * Changes the type of shadow drawn around the contents of
 963  * @scrolled_window.
 964  *
 965  **/
 966 void
 967 gtk_scrolled_window_set_shadow_type (GtkScrolledWindow *scrolled_window,
 968                                      GtkShadowType      type)
 969 {
 970   GtkScrolledWindowPrivate *priv;
 971
 972   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
 973   g_return_if_fail (type >= GTK_SHADOW_NONE && type <= GTK_SHADOW_ETCHED_OUT);
 974
 975   priv = scrolled_window->priv;
 976
 977   if (priv->shadow_type != type)
 978     {
 979       priv->shadow_type = type;
 980
 981       if (gtk_widget_is_drawable (GTK_WIDGET (scrolled_window)))
 982         gtk_widget_queue_draw (GTK_WIDGET (scrolled_window));
 983
 984       gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
 985
 986       g_object_notify (G_OBJECT (scrolled_window), "shadow-type");
 987     }
 988 }
 989
 990 /**
 991  * gtk_scrolled_window_get_shadow_type:
 992  * @scrolled_window: a #GtkScrolledWindow
 993  *
 994  * Gets the shadow type of the scrolled window. See
 995  * gtk_scrolled_window_set_shadow_type().
 996  *
 997  * Return value: the current shadow type
 998  **/
 999 GtkShadowType
1000 gtk_scrolled_window_get_shadow_type (GtkScrolledWindow *scrolled_window)
1001 {
1002   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_SHADOW_NONE);
1003
1004   return scrolled_window->priv->shadow_type;
1005 }
1006
1007 static void
1008 gtk_scrolled_window_destroy (GtkWidget *widget)
1009 {
1010   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
1011   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1012
1013   if (priv->hscrollbar)
1014     {
1015       g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)),
1016                                             gtk_scrolled_window_adjustment_changed,
1017                                             scrolled_window);
1018       gtk_widget_unparent (priv->hscrollbar);
1019       gtk_widget_destroy (priv->hscrollbar);
1020       g_object_unref (priv->hscrollbar);
1021       priv->hscrollbar = NULL;
1022     }
1023   if (priv->vscrollbar)
1024     {
1025       g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)),
1026                                             gtk_scrolled_window_adjustment_changed,
1027                                             scrolled_window);
1028       gtk_widget_unparent (priv->vscrollbar);
1029       gtk_widget_destroy (priv->vscrollbar);
1030       g_object_unref (priv->vscrollbar);
1031       priv->vscrollbar = NULL;
1032     }
1033
1034   GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->destroy (widget);
1035 }
1036
1037 static void
1038 gtk_scrolled_window_set_property (GObject      *object,
1039                                   guint         prop_id,
1040                                   const GValue *value,
1041                                   GParamSpec   *pspec)
1042 {
1043   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
1044   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1045
1046   switch (prop_id)
1047     {
1048     case PROP_HADJUSTMENT:
1049       gtk_scrolled_window_set_hadjustment (scrolled_window,
1050                                            g_value_get_object (value));
1051       break;
1052     case PROP_VADJUSTMENT:
1053       gtk_scrolled_window_set_vadjustment (scrolled_window,
1054                                            g_value_get_object (value));
1055       break;
1056     case PROP_HSCROLLBAR_POLICY:
1057       gtk_scrolled_window_set_policy (scrolled_window,
1058                                       g_value_get_enum (value),
1059                                       priv->vscrollbar_policy);
1060       break;
1061     case PROP_VSCROLLBAR_POLICY:
1062       gtk_scrolled_window_set_policy (scrolled_window,
1063                                       priv->hscrollbar_policy,
1064                                       g_value_get_enum (value));
1065       break;
1066     case PROP_WINDOW_PLACEMENT:
1067       gtk_scrolled_window_set_placement_internal (scrolled_window,
1068                                                   g_value_get_enum (value));
1069       break;
1070     case PROP_WINDOW_PLACEMENT_SET:
1071       gtk_scrolled_window_set_placement_set (scrolled_window,
1072                                              g_value_get_boolean (value),
1073                                              TRUE);
1074       break;
1075     case PROP_SHADOW_TYPE:
1076       gtk_scrolled_window_set_shadow_type (scrolled_window,
1077                                            g_value_get_enum (value));
1078       break;
1079     case PROP_MIN_CONTENT_WIDTH:
1080       gtk_scrolled_window_set_min_content_width (scrolled_window,
1081                                                  g_value_get_int (value));
1082       break;
1083     case PROP_MIN_CONTENT_HEIGHT:
1084       gtk_scrolled_window_set_min_content_height (scrolled_window,
1085                                                   g_value_get_int (value));
1086       break;
1087     default:
1088       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1089       break;
1090     }
1091 }
1092
1093 static void
1094 gtk_scrolled_window_get_property (GObject    *object,
1095                                   guint       prop_id,
1096                                   GValue     *value,
1097                                   GParamSpec *pspec)
1098 {
1099   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
1100   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1101
1102   switch (prop_id)
1103     {
1104     case PROP_HADJUSTMENT:
1105       g_value_set_object (value,
1106                           G_OBJECT (gtk_scrolled_window_get_hadjustment (scrolled_window)));
1107       break;
1108     case PROP_VADJUSTMENT:
1109       g_value_set_object (value,
1110                           G_OBJECT (gtk_scrolled_window_get_vadjustment (scrolled_window)));
1111       break;
1112     case PROP_WINDOW_PLACEMENT:
1113       g_value_set_enum (value, priv->window_placement);
1114       break;
1115     case PROP_WINDOW_PLACEMENT_SET:
1116       g_value_set_boolean (value, priv->window_placement_set);
1117       break;
1118     case PROP_SHADOW_TYPE:
1119       g_value_set_enum (value, priv->shadow_type);
1120       break;
1121     case PROP_HSCROLLBAR_POLICY:
1122       g_value_set_enum (value, priv->hscrollbar_policy);
1123       break;
1124     case PROP_VSCROLLBAR_POLICY:
1125       g_value_set_enum (value, priv->vscrollbar_policy);
1126       break;
1127     case PROP_MIN_CONTENT_WIDTH:
1128       g_value_set_int (value, priv->min_content_width);
1129       break;
1130     case PROP_MIN_CONTENT_HEIGHT:
1131       g_value_set_int (value, priv->min_content_height);
1132       break;
1133     default:
1134       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1135       break;
1136     }
1137 }
1138
1139 static void
1140 traverse_container (GtkWidget *widget,
1141                     gpointer   data)
1142 {
1143   if (GTK_IS_SCROLLED_WINDOW (widget))
1144     {
1145       gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget));
1146       gtk_widget_queue_resize (widget);
1147     }
1148   else if (GTK_IS_CONTAINER (widget))
1149     gtk_container_forall (GTK_CONTAINER (widget), traverse_container, NULL);
1150 }
1151
1152 static void
1153 gtk_scrolled_window_settings_changed (GtkSettings *settings)
1154 {
1155   GList *list, *l;
1156
1157   list = gtk_window_list_toplevels ();
1158
1159   for (l = list; l; l = l->next)
1160     gtk_container_forall (GTK_CONTAINER (l->data),
1161                           traverse_container, NULL);
1162
1163   g_list_free (list);
1164 }
1165
1166 static void
1167 gtk_scrolled_window_screen_changed (GtkWidget *widget,
1168                                     GdkScreen *previous_screen)
1169 {
1170   GtkSettings *settings;
1171   guint window_placement_connection;
1172
1173   gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget));
1174
1175   if (!gtk_widget_has_screen (widget))
1176     return;
1177
1178   settings = gtk_widget_get_settings (widget);
1179
1180   window_placement_connection =
1181     GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (settings),
1182                                          "gtk-scrolled-window-connection"));
1183
1184   if (window_placement_connection)
1185     return;
1186
1187   window_placement_connection =
1188     g_signal_connect (settings, "notify::gtk-scrolled-window-placement",
1189                       G_CALLBACK (gtk_scrolled_window_settings_changed), NULL);
1190   g_object_set_data (G_OBJECT (settings),
1191                      I_("gtk-scrolled-window-connection"),
1192                      GUINT_TO_POINTER (window_placement_connection));
1193 }
1194
1195 static gboolean
1196 gtk_scrolled_window_draw (GtkWidget *widget,
1197                           cairo_t   *cr)
1198 {
1199   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
1200   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1201
1202   if (priv->shadow_type != GTK_SHADOW_NONE)
1203     {
1204       GtkAllocation relative_allocation;
1205       GtkStyleContext *context;
1206       gboolean scrollbars_within_bevel;
1207
1208       context = gtk_widget_get_style_context (widget);
1209
1210       gtk_style_context_save (context);
1211       gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1212
1213       gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL);
1214
1215       if (!scrollbars_within_bevel)
1216         {
1217           GtkStateFlags state;
1218           GtkBorder padding, border;
1219
1220           state = gtk_widget_get_state_flags (widget);
1221           gtk_style_context_get_padding (context, state, &padding);
1222           gtk_style_context_get_border (context, state, &border);
1223
1224           gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
1225
1226           relative_allocation.x -= padding.left + border.left;
1227           relative_allocation.y -= padding.top + border.top;
1228           relative_allocation.width += padding.left + padding.right + border.left + border.right;
1229           relative_allocation.height += padding.top + padding.bottom + border.top + border.bottom;
1230         }
1231       else
1232         {
1233           relative_allocation.x = 0;
1234           relative_allocation.y = 0;
1235           relative_allocation.width = gtk_widget_get_allocated_width (widget);
1236           relative_allocation.height = gtk_widget_get_allocated_height (widget);
1237         }
1238
1239       gtk_render_frame (context, cr,
1240                         relative_allocation.x,
1241                         relative_allocation.y,
1242                         relative_allocation.width,
1243                         relative_allocation.height);
1244
1245       gtk_style_context_restore (context);
1246     }
1247
1248   GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->draw (widget, cr);
1249
1250   return FALSE;
1251 }
1252
1253 static void
1254 gtk_scrolled_window_forall (GtkContainer *container,
1255                             gboolean      include_internals,
1256                             GtkCallback   callback,
1257                             gpointer      callback_data)
1258 {
1259   GtkScrolledWindowPrivate *priv;
1260   GtkScrolledWindow *scrolled_window;
1261
1262   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
1263   g_return_if_fail (callback != NULL);
1264
1265   GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->forall (container,
1266                                               include_internals,
1267                                               callback,
1268                                               callback_data);
1269   if (include_internals)
1270     {
1271       scrolled_window = GTK_SCROLLED_WINDOW (container);
1272       priv = scrolled_window->priv;
1273
1274       if (priv->vscrollbar)
1275         callback (priv->vscrollbar, callback_data);
1276       if (priv->hscrollbar)
1277         callback (priv->hscrollbar, callback_data);
1278     }
1279 }
1280
1281 static gboolean
1282 gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window,
1283                                   GtkScrollType      scroll,
1284                                   gboolean           horizontal)
1285 {
1286   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1287   GtkAdjustment *adjustment = NULL;
1288
1289   switch (scroll)
1290     {
1291     case GTK_SCROLL_STEP_UP:
1292       scroll = GTK_SCROLL_STEP_BACKWARD;
1293       horizontal = FALSE;
1294       break;
1295     case GTK_SCROLL_STEP_DOWN:
1296       scroll = GTK_SCROLL_STEP_FORWARD;
1297       horizontal = FALSE;
1298       break;
1299     case GTK_SCROLL_STEP_LEFT:
1300       scroll = GTK_SCROLL_STEP_BACKWARD;
1301       horizontal = TRUE;
1302       break;
1303     case GTK_SCROLL_STEP_RIGHT:
1304       scroll = GTK_SCROLL_STEP_FORWARD;
1305       horizontal = TRUE;
1306       break;
1307     case GTK_SCROLL_PAGE_UP:
1308       scroll = GTK_SCROLL_PAGE_BACKWARD;
1309       horizontal = FALSE;
1310       break;
1311     case GTK_SCROLL_PAGE_DOWN:
1312       scroll = GTK_SCROLL_PAGE_FORWARD;
1313       horizontal = FALSE;
1314       break;
1315     case GTK_SCROLL_PAGE_LEFT:
1316       scroll = GTK_SCROLL_STEP_BACKWARD;
1317       horizontal = TRUE;
1318       break;
1319     case GTK_SCROLL_PAGE_RIGHT:
1320       scroll = GTK_SCROLL_STEP_FORWARD;
1321       horizontal = TRUE;
1322       break;
1323     case GTK_SCROLL_STEP_BACKWARD:
1324     case GTK_SCROLL_STEP_FORWARD:
1325     case GTK_SCROLL_PAGE_BACKWARD:
1326     case GTK_SCROLL_PAGE_FORWARD:
1327     case GTK_SCROLL_START:
1328     case GTK_SCROLL_END:
1329       break;
1330     default:
1331       g_warning ("Invalid scroll type %u for GtkScrolledWindow::scroll-child", scroll);
1332       return FALSE;
1333     }
1334
1335   if ((horizontal && (!priv->hscrollbar || !priv->hscrollbar_visible)) ||
1336       (!horizontal && (!priv->vscrollbar || !priv->vscrollbar_visible)))
1337     return FALSE;
1338
1339   if (horizontal)
1340     {
1341       if (priv->hscrollbar)
1342         adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
1343     }
1344   else
1345     {
1346       if (priv->vscrollbar)
1347         adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
1348     }
1349
1350   if (adjustment)
1351     {
1352       gdouble value = gtk_adjustment_get_value (adjustment);
1353
1354       switch (scroll)
1355         {
1356         case GTK_SCROLL_STEP_FORWARD:
1357           value += gtk_adjustment_get_step_increment (adjustment);
1358           break;
1359         case GTK_SCROLL_STEP_BACKWARD:
1360           value -= gtk_adjustment_get_step_increment (adjustment);
1361           break;
1362         case GTK_SCROLL_PAGE_FORWARD:
1363           value += gtk_adjustment_get_page_increment (adjustment);
1364           break;
1365         case GTK_SCROLL_PAGE_BACKWARD:
1366           value -= gtk_adjustment_get_page_increment (adjustment);
1367           break;
1368         case GTK_SCROLL_START:
1369           value = gtk_adjustment_get_lower (adjustment);
1370           break;
1371         case GTK_SCROLL_END:
1372           value = gtk_adjustment_get_upper (adjustment);
1373           break;
1374         default:
1375           g_assert_not_reached ();
1376           break;
1377         }
1378
1379       gtk_adjustment_set_value (adjustment, value);
1380
1381       return TRUE;
1382     }
1383
1384   return FALSE;
1385 }
1386
1387 static void
1388 gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window,
1389                                     GtkDirectionType   direction_type)
1390 {
1391   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1392   GtkWidget *toplevel;
1393
1394   /* Focus out of the scrolled window entirely. We do this by setting
1395    * a flag, then propagating the focus motion to the notebook.
1396    */
1397   toplevel = gtk_widget_get_toplevel (GTK_WIDGET (scrolled_window));
1398   if (!gtk_widget_is_toplevel (toplevel))
1399     return;
1400
1401   g_object_ref (scrolled_window);
1402
1403   priv->focus_out = TRUE;
1404   g_signal_emit_by_name (toplevel, "move-focus", direction_type);
1405   priv->focus_out = FALSE;
1406
1407   g_object_unref (scrolled_window);
1408 }
1409
1410 static void
1411 gtk_scrolled_window_relative_allocation (GtkWidget     *widget,
1412                                          GtkAllocation *allocation)
1413 {
1414   GtkAllocation widget_allocation;
1415   GtkScrolledWindow *scrolled_window;
1416   GtkScrolledWindowPrivate *priv;
1417   gint sb_spacing;
1418   gint sb_width;
1419   gint sb_height;
1420
1421   g_return_if_fail (widget != NULL);
1422   g_return_if_fail (allocation != NULL);
1423
1424   scrolled_window = GTK_SCROLLED_WINDOW (widget);
1425   priv = scrolled_window->priv;
1426
1427   /* Get possible scrollbar dimensions */
1428   sb_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
1429   gtk_widget_get_preferred_height (priv->hscrollbar, &sb_height, NULL);
1430   gtk_widget_get_preferred_width (priv->vscrollbar, &sb_width, NULL);
1431
1432   /* Subtract some things from our available allocation size */
1433   allocation->x = 0;
1434   allocation->y = 0;
1435
1436   if (priv->shadow_type != GTK_SHADOW_NONE)
1437     {
1438       GtkStyleContext *context;
1439       GtkStateFlags state;
1440       GtkBorder padding, border;
1441
1442       context = gtk_widget_get_style_context (widget);
1443       state = gtk_widget_get_state_flags (widget);
1444
1445       gtk_style_context_save (context);
1446       gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1447
1448       gtk_style_context_get_border (context, state, &border);
1449       gtk_style_context_get_padding (context, state, &padding);
1450
1451       allocation->x += padding.left + border.left;
1452       allocation->y += padding.top + border.top;
1453
1454       gtk_style_context_restore (context);
1455     }
1456
1457   gtk_widget_get_allocation (widget, &widget_allocation);
1458   allocation->width = MAX (1, (gint) widget_allocation.width - allocation->x * 2);
1459   allocation->height = MAX (1, (gint) widget_allocation.height - allocation->y * 2);
1460
1461   if (priv->vscrollbar_visible)
1462     {
1463       gboolean is_rtl;
1464
1465       is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
1466
1467       if ((!is_rtl &&
1468            (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
1469             priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
1470           (is_rtl &&
1471            (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1472             priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
1473         allocation->x += (sb_width +  sb_spacing);
1474
1475       allocation->width = MAX (1, allocation->width - (sb_width + sb_spacing));
1476     }
1477   if (priv->hscrollbar_visible)
1478     {
1479
1480       if (priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT ||
1481           priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)
1482         allocation->y += (sb_height + sb_spacing);
1483
1484       allocation->height = MAX (1, allocation->height - (sb_height + sb_spacing));
1485     }
1486 }
1487
1488 static void
1489 gtk_scrolled_window_allocate_child (GtkScrolledWindow *swindow,
1490                                     GtkAllocation     *relative_allocation)
1491 {
1492   GtkWidget     *widget = GTK_WIDGET (swindow), *child;
1493   GtkAllocation  allocation;
1494   GtkAllocation  child_allocation;
1495
1496   child = gtk_bin_get_child (GTK_BIN (widget));
1497
1498   gtk_widget_get_allocation (widget, &allocation);
1499
1500   gtk_scrolled_window_relative_allocation (widget, relative_allocation);
1501   child_allocation.x = relative_allocation->x + allocation.x;
1502   child_allocation.y = relative_allocation->y + allocation.y;
1503   child_allocation.width = relative_allocation->width;
1504   child_allocation.height = relative_allocation->height;
1505
1506   gtk_widget_size_allocate (child, &child_allocation);
1507 }
1508
1509 static void
1510 gtk_scrolled_window_size_allocate (GtkWidget     *widget,
1511                                    GtkAllocation *allocation)
1512 {
1513   GtkScrolledWindow *scrolled_window;
1514   GtkScrolledWindowPrivate *priv;
1515   GtkStyleContext *context;
1516   GtkStateFlags state;
1517   GtkBorder padding, border;
1518   GtkBin *bin;
1519   GtkAllocation relative_allocation;
1520   GtkAllocation child_allocation;
1521   GtkWidget *child;
1522   gboolean scrollbars_within_bevel;
1523   gint sb_spacing;
1524   gint sb_width;
1525   gint sb_height;
1526
1527   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
1528   g_return_if_fail (allocation != NULL);
1529
1530   scrolled_window = GTK_SCROLLED_WINDOW (widget);
1531   bin = GTK_BIN (scrolled_window);
1532   priv = scrolled_window->priv;
1533
1534   /* Get possible scrollbar dimensions */
1535   sb_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
1536   gtk_widget_get_preferred_height (priv->hscrollbar, &sb_height, NULL);
1537   gtk_widget_get_preferred_width (priv->vscrollbar, &sb_width, NULL);
1538
1539   context = gtk_widget_get_style_context (widget);
1540   state = gtk_widget_get_state_flags (widget);
1541
1542   gtk_style_context_save (context);
1543   gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1544
1545   gtk_style_context_get_padding (context, state, &padding);
1546   gtk_style_context_get_border (context, state, &border);
1547
1548   gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL);
1549
1550   gtk_widget_set_allocation (widget, allocation);
1551
1552   gtk_style_context_restore (context);
1553
1554   if (priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
1555     priv->hscrollbar_visible = TRUE;
1556   else if (priv->hscrollbar_policy == GTK_POLICY_NEVER)
1557     priv->hscrollbar_visible = FALSE;
1558   if (priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
1559     priv->vscrollbar_visible = TRUE;
1560   else if (priv->vscrollbar_policy == GTK_POLICY_NEVER)
1561     priv->vscrollbar_visible = FALSE;
1562
1563   child = gtk_bin_get_child (bin);
1564   if (child && gtk_widget_get_visible (child))
1565     {
1566       gint child_scroll_width;
1567       gint child_scroll_height;
1568       gboolean previous_hvis;
1569       gboolean previous_vvis;
1570       guint count = 0;
1571
1572       /* Determine scrollbar visibility first via hfw apis */
1573       if (gtk_widget_get_request_mode (child) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
1574         {
1575           if (gtk_scrollable_get_hscroll_policy (GTK_SCROLLABLE (child)) == GTK_SCROLL_MINIMUM)
1576             gtk_widget_get_preferred_width (child, &child_scroll_width, NULL);
1577           else
1578             gtk_widget_get_preferred_width (child, NULL, &child_scroll_width);
1579
1580           if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
1581             {
1582               /* First try without a vertical scrollbar if the content will fit the height
1583                * given the extra width of the scrollbar */
1584               if (gtk_scrollable_get_vscroll_policy (GTK_SCROLLABLE (child)) == GTK_SCROLL_MINIMUM)
1585                 gtk_widget_get_preferred_height_for_width (child,
1586                                                            MAX (allocation->width, child_scroll_width),
1587                                                            &child_scroll_height, NULL);
1588               else
1589                 gtk_widget_get_preferred_height_for_width (child,
1590                                                            MAX (allocation->width, child_scroll_width),
1591                                                            NULL, &child_scroll_height);
1592
1593               if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
1594                 {
1595                   /* Does the content height fit the allocation height ? */
1596                   priv->vscrollbar_visible = child_scroll_height > allocation->height;
1597
1598                   /* Does the content width fit the allocation with minus a possible scrollbar ? */
1599                   priv->hscrollbar_visible =
1600                     child_scroll_width > allocation->width -
1601                     (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
1602
1603                   /* Now that we've guessed the hscrollbar, does the content height fit
1604                    * the possible new allocation height ? */
1605                   priv->vscrollbar_visible =
1606                     child_scroll_height > allocation->height -
1607                     (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
1608
1609                   /* Now that we've guessed the vscrollbar, does the content width fit
1610                    * the possible new allocation width ? */
1611                   priv->hscrollbar_visible =
1612                     child_scroll_width > allocation->width -
1613                     (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
1614                 }
1615               else /* priv->hscrollbar_policy != GTK_POLICY_AUTOMATIC */
1616                 {
1617                   priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
1618                   priv->vscrollbar_visible = child_scroll_height > allocation->height -
1619                     (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
1620                 }
1621             }
1622           else /* priv->vscrollbar_policy != GTK_POLICY_AUTOMATIC */
1623             {
1624               priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
1625
1626               if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
1627                 priv->hscrollbar_visible =
1628                   child_scroll_width > allocation->width -
1629                   (priv->vscrollbar_visible ? 0 : sb_width + sb_spacing);
1630               else
1631                 priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
1632             }
1633         }
1634       else /* GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT */
1635         {
1636           if (gtk_scrollable_get_vscroll_policy (GTK_SCROLLABLE (child)) == GTK_SCROLL_MINIMUM)
1637             gtk_widget_get_preferred_height (child, &child_scroll_height, NULL);
1638           else
1639             gtk_widget_get_preferred_height (child, NULL, &child_scroll_height);
1640
1641           if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
1642             {
1643               /* First try without a horizontal scrollbar if the content will fit the width
1644                * given the extra height of the scrollbar */
1645               if (gtk_scrollable_get_hscroll_policy (GTK_SCROLLABLE (child)) == GTK_SCROLL_MINIMUM)
1646                 gtk_widget_get_preferred_width_for_height (child,
1647                                                            MAX (allocation->height, child_scroll_height),
1648                                                            &child_scroll_width, NULL);
1649               else
1650                 gtk_widget_get_preferred_width_for_height (child,
1651                                                            MAX (allocation->height, child_scroll_height),
1652                                                            NULL, &child_scroll_width);
1653
1654               if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
1655                 {
1656                   /* Does the content width fit the allocation width ? */
1657                   priv->hscrollbar_visible = child_scroll_width > allocation->width;
1658
1659                   /* Does the content height fit the allocation with minus a possible scrollbar ? */
1660                   priv->vscrollbar_visible =
1661                     child_scroll_height > allocation->height -
1662                     (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
1663
1664                   /* Now that we've guessed the vscrollbar, does the content width fit
1665                    * the possible new allocation width ? */
1666                   priv->hscrollbar_visible =
1667                     child_scroll_width > allocation->width -
1668                     (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
1669
1670                   /* Now that we've guessed the hscrollbar, does the content height fit
1671                    * the possible new allocation height ? */
1672                   priv->vscrollbar_visible =
1673                     child_scroll_height > allocation->height -
1674                     (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
1675                 }
1676               else /* priv->vscrollbar_policy != GTK_POLICY_AUTOMATIC */
1677                 {
1678                   priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
1679                   priv->hscrollbar_visible = child_scroll_width > allocation->width -
1680                     (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
1681                 }
1682             }
1683           else /* priv->hscrollbar_policy != GTK_POLICY_AUTOMATIC */
1684             {
1685               priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
1686
1687               if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
1688                 priv->vscrollbar_visible =
1689                   child_scroll_height > allocation->height -
1690                   (priv->hscrollbar_visible ? 0 : sb_height + sb_spacing);
1691               else
1692                 priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
1693             }
1694         }
1695
1696       /* Now after guessing scrollbar visibility; fall back on the allocation loop which
1697        * observes the adjustments to detect scrollbar visibility and also avoids
1698        * infinite recursion
1699        */
1700       do
1701         {
1702           previous_hvis = priv->hscrollbar_visible;
1703           previous_vvis = priv->vscrollbar_visible;
1704           gtk_scrolled_window_allocate_child (scrolled_window, &relative_allocation);
1705
1706           /* Explicitly force scrollbar visibility checks.
1707            *
1708            * Since we make a guess above, the child might not decide to update the adjustments
1709            * if they logically did not change since the last configuration
1710            */
1711           if (priv->hscrollbar)
1712             gtk_scrolled_window_adjustment_changed
1713               (gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)), scrolled_window);
1714
1715           if (priv->vscrollbar)
1716             gtk_scrolled_window_adjustment_changed
1717               (gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)), scrolled_window);
1718
1719           /* If, after the first iteration, the hscrollbar and the
1720            * vscrollbar flip visiblity... or if one of the scrollbars flip
1721            * on each itteration indefinitly/infinitely, then we just need both
1722            * at this size.
1723            */
1724           if ((count &&
1725                previous_hvis != priv->hscrollbar_visible &&
1726                previous_vvis != priv->vscrollbar_visible) || count > 3)
1727             {
1728               priv->hscrollbar_visible = TRUE;
1729               priv->vscrollbar_visible = TRUE;
1730
1731               gtk_scrolled_window_allocate_child (scrolled_window, &relative_allocation);
1732
1733               break;
1734             }
1735
1736           count++;
1737         }
1738       while (previous_hvis != priv->hscrollbar_visible ||
1739              previous_vvis != priv->vscrollbar_visible);
1740     }
1741   else
1742     {
1743       priv->hscrollbar_visible = priv->hscrollbar_policy == GTK_POLICY_ALWAYS;
1744       priv->vscrollbar_visible = priv->vscrollbar_policy == GTK_POLICY_ALWAYS;
1745       gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
1746     }
1747
1748   if (priv->hscrollbar_visible)
1749     {
1750       if (!gtk_widget_get_visible (priv->hscrollbar))
1751         gtk_widget_show (priv->hscrollbar);
1752
1753       child_allocation.x = relative_allocation.x;
1754       if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1755           priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
1756         child_allocation.y = (relative_allocation.y +
1757                               relative_allocation.height +
1758                               sb_spacing +
1759                               (priv->shadow_type == GTK_SHADOW_NONE ?
1760                                0 : padding.top + border.top));
1761       else
1762         child_allocation.y = 0;
1763
1764       child_allocation.width = relative_allocation.width;
1765       child_allocation.height = sb_height;
1766       child_allocation.x += allocation->x;
1767       child_allocation.y += allocation->y;
1768
1769       if (priv->shadow_type != GTK_SHADOW_NONE)
1770         {
1771           if (!scrollbars_within_bevel)
1772             {
1773               child_allocation.x -= padding.left + border.left;
1774               child_allocation.width += padding.left + padding.right + border.left + border.right;
1775             }
1776           else if (GTK_CORNER_TOP_RIGHT == priv->real_window_placement ||
1777                    GTK_CORNER_TOP_LEFT == priv->real_window_placement)
1778             {
1779               child_allocation.y -= padding.top + border.top;
1780             }
1781           else
1782             {
1783               child_allocation.y += padding.top + border.top;
1784             }
1785         }
1786
1787       gtk_widget_size_allocate (priv->hscrollbar, &child_allocation);
1788     }
1789   else if (gtk_widget_get_visible (priv->hscrollbar))
1790     gtk_widget_hide (priv->hscrollbar);
1791
1792   if (priv->vscrollbar_visible)
1793     {
1794       if (!gtk_widget_get_visible (priv->vscrollbar))
1795         gtk_widget_show (priv->vscrollbar);
1796
1797       if ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL &&
1798            (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
1799             priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
1800           (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
1801            (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1802             priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
1803         child_allocation.x = (relative_allocation.x +
1804                               relative_allocation.width +
1805                               sb_spacing +
1806                               (priv->shadow_type == GTK_SHADOW_NONE ?
1807                                0 : padding.left + border.left));
1808       else
1809         child_allocation.x = 0;
1810
1811       child_allocation.y = relative_allocation.y;
1812       child_allocation.width = sb_width;
1813       child_allocation.height = relative_allocation.height;
1814       child_allocation.x += allocation->x;
1815       child_allocation.y += allocation->y;
1816
1817       if (priv->shadow_type != GTK_SHADOW_NONE)
1818         {
1819           if (!scrollbars_within_bevel)
1820             {
1821               child_allocation.y -= padding.top + border.top;
1822               child_allocation.height += padding.top + padding.bottom + border.top + border.bottom;
1823             }
1824           else if (GTK_CORNER_BOTTOM_LEFT == priv->real_window_placement ||
1825                    GTK_CORNER_TOP_LEFT == priv->real_window_placement)
1826             {
1827               child_allocation.x -= padding.left + border.left;
1828             }
1829           else
1830             {
1831               child_allocation.x += padding.left + border.left;
1832             }
1833         }
1834
1835       gtk_widget_size_allocate (priv->vscrollbar, &child_allocation);
1836     }
1837   else if (gtk_widget_get_visible (priv->vscrollbar))
1838     gtk_widget_hide (priv->vscrollbar);
1839 }
1840
1841 static gboolean
1842 gtk_scrolled_window_scroll_event (GtkWidget      *widget,
1843                                   GdkEventScroll *event)
1844 {
1845   GtkScrolledWindowPrivate *priv;
1846   GtkScrolledWindow *scrolled_window;
1847   GtkWidget *range;
1848
1849   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (widget), FALSE);
1850   g_return_val_if_fail (event != NULL, FALSE);
1851
1852   scrolled_window = GTK_SCROLLED_WINDOW (widget);
1853   priv = scrolled_window->priv;
1854
1855   if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_DOWN)
1856     range = priv->vscrollbar;
1857   else
1858     range = priv->hscrollbar;
1859
1860   if (range && gtk_widget_get_visible (range))
1861     {
1862       GtkAdjustment *adjustment = gtk_range_get_adjustment (GTK_RANGE (range));
1863       gdouble delta;
1864
1865       delta = _gtk_range_get_wheel_delta (GTK_RANGE (range), event->direction);
1866
1867       gtk_adjustment_set_value (adjustment, gtk_adjustment_get_value (adjustment) + delta);
1868
1869       return TRUE;
1870     }
1871
1872   return FALSE;
1873 }
1874
1875 static gboolean
1876 gtk_scrolled_window_focus (GtkWidget        *widget,
1877                            GtkDirectionType  direction)
1878 {
1879   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
1880   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1881   GtkWidget *child;
1882   gboolean had_focus_child;
1883
1884   had_focus_child = gtk_container_get_focus_child (GTK_CONTAINER (widget)) != NULL;
1885
1886   if (priv->focus_out)
1887     {
1888       priv->focus_out = FALSE; /* Clear this to catch the wrap-around case */
1889       return FALSE;
1890     }
1891
1892   if (gtk_widget_is_focus (widget))
1893     return FALSE;
1894
1895   /* We only put the scrolled window itself in the focus chain if it
1896    * isn't possible to focus any children.
1897    */
1898   child = gtk_bin_get_child (GTK_BIN (widget));
1899   if (child)
1900     {
1901       if (gtk_widget_child_focus (child, direction))
1902         return TRUE;
1903     }
1904
1905   if (!had_focus_child && gtk_widget_get_can_focus (widget))
1906     {
1907       gtk_widget_grab_focus (widget);
1908       return TRUE;
1909     }
1910   else
1911     return FALSE;
1912 }
1913
1914 static void
1915 gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
1916                                         gpointer       data)
1917 {
1918   GtkScrolledWindowPrivate *priv;
1919   GtkScrolledWindow *scrolled_window;
1920
1921   g_return_if_fail (adjustment != NULL);
1922   g_return_if_fail (data != NULL);
1923
1924   scrolled_window = GTK_SCROLLED_WINDOW (data);
1925   priv = scrolled_window->priv;
1926
1927   if (priv->hscrollbar &&
1928       adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
1929     {
1930       if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
1931         {
1932           gboolean visible;
1933
1934           visible = priv->hscrollbar_visible;
1935           priv->hscrollbar_visible = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment) >
1936                                       gtk_adjustment_get_page_size (adjustment));
1937
1938           if (priv->hscrollbar_visible != visible)
1939             gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
1940         }
1941     }
1942   else if (priv->vscrollbar &&
1943            adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
1944     {
1945       if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
1946         {
1947           gboolean visible;
1948
1949           visible = priv->vscrollbar_visible;
1950           priv->vscrollbar_visible = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment) >
1951                                       gtk_adjustment_get_page_size (adjustment));
1952
1953           if (priv->vscrollbar_visible != visible)
1954             gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
1955         }
1956     }
1957 }
1958
1959 static void
1960 gtk_scrolled_window_add (GtkContainer *container,
1961                          GtkWidget    *child)
1962 {
1963   GtkScrolledWindowPrivate *priv;
1964   GtkScrolledWindow *scrolled_window;
1965   GtkBin *bin;
1966   GtkWidget *child_widget;
1967   GtkAdjustment *hadj, *vadj;
1968
1969   bin = GTK_BIN (container);
1970   child_widget = gtk_bin_get_child (bin);
1971   g_return_if_fail (child_widget == NULL);
1972
1973   scrolled_window = GTK_SCROLLED_WINDOW (container);
1974   priv = scrolled_window->priv;
1975
1976   _gtk_bin_set_child (bin, child);
1977   gtk_widget_set_parent (child, GTK_WIDGET (bin));
1978
1979   hadj = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
1980   vadj = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
1981
1982   if (GTK_IS_SCROLLABLE (child))
1983     g_object_set (child, "hadjustment", hadj, "vadjustment", vadj, NULL);
1984   else
1985     g_warning ("gtk_scrolled_window_add(): cannot add non scrollable widget "
1986                "use gtk_scrolled_window_add_with_viewport() instead");
1987 }
1988
1989 static void
1990 gtk_scrolled_window_remove (GtkContainer *container,
1991                             GtkWidget    *child)
1992 {
1993   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
1994   g_return_if_fail (child != NULL);
1995   g_return_if_fail (gtk_bin_get_child (GTK_BIN (container)) == child);
1996
1997   g_object_set (child, "hadjustment", NULL, "vadjustment", NULL, NULL);
1998
1999   /* chain parent class handler to remove child */
2000   GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->remove (container, child);
2001 }
2002
2003 /**
2004  * gtk_scrolled_window_add_with_viewport:
2005  * @scrolled_window: a #GtkScrolledWindow
2006  * @child: the widget you want to scroll
2007  *
2008  * Used to add children without native scrolling capabilities. This
2009  * is simply a convenience function; it is equivalent to adding the
2010  * unscrollable child to a viewport, then adding the viewport to the
2011  * scrolled window. If a child has native scrolling, use
2012  * gtk_container_add() instead of this function.
2013  *
2014  * The viewport scrolls the child by moving its #GdkWindow, and takes
2015  * the size of the child to be the size of its toplevel #GdkWindow.
2016  * This will be very wrong for most widgets that support native scrolling;
2017  * for example, if you add a widget such as #GtkTreeView with a viewport,
2018  * the whole widget will scroll, including the column headings. Thus,
2019  * widgets with native scrolling support should not be used with the
2020  * #GtkViewport proxy.
2021  *
2022  * A widget supports scrolling natively if it implements the
2023  * #GtkScrollable interface.
2024  */
2025 void
2026 gtk_scrolled_window_add_with_viewport (GtkScrolledWindow *scrolled_window,
2027                                        GtkWidget         *child)
2028 {
2029   GtkBin *bin;
2030   GtkWidget *viewport;
2031   GtkWidget *child_widget;
2032
2033   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
2034   g_return_if_fail (GTK_IS_WIDGET (child));
2035   g_return_if_fail (gtk_widget_get_parent (child) == NULL);
2036
2037   bin = GTK_BIN (scrolled_window);
2038   child_widget = gtk_bin_get_child (bin);
2039
2040   if (child_widget)
2041     {
2042       g_return_if_fail (GTK_IS_VIEWPORT (child_widget));
2043       g_return_if_fail (gtk_bin_get_child (GTK_BIN (child_widget)) == NULL);
2044
2045       viewport = child_widget;
2046     }
2047   else
2048     {
2049       viewport =
2050         gtk_viewport_new (gtk_scrolled_window_get_hadjustment (scrolled_window),
2051                           gtk_scrolled_window_get_vadjustment (scrolled_window));
2052       gtk_container_add (GTK_CONTAINER (scrolled_window), viewport);
2053     }
2054
2055   gtk_widget_show (viewport);
2056   gtk_container_add (GTK_CONTAINER (viewport), child);
2057 }
2058
2059 /*
2060  * _gtk_scrolled_window_get_spacing:
2061  * @scrolled_window: a scrolled window
2062  *
2063  * Gets the spacing between the scrolled window's scrollbars and
2064  * the scrolled widget. Used by GtkCombo
2065  *
2066  * Return value: the spacing, in pixels.
2067  */
2068 gint
2069 _gtk_scrolled_window_get_scrollbar_spacing (GtkScrolledWindow *scrolled_window)
2070 {
2071   GtkScrolledWindowClass *class;
2072
2073   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
2074
2075   class = GTK_SCROLLED_WINDOW_GET_CLASS (scrolled_window);
2076
2077   if (class->scrollbar_spacing >= 0)
2078     return class->scrollbar_spacing;
2079   else
2080     {
2081       gint scrollbar_spacing;
2082
2083       gtk_widget_style_get (GTK_WIDGET (scrolled_window),
2084                             "scrollbar-spacing", &scrollbar_spacing,
2085                             NULL);
2086
2087       return scrollbar_spacing;
2088     }
2089 }
2090
2091
2092 static void
2093 gtk_scrolled_window_get_preferred_size (GtkWidget      *widget,
2094                                         GtkOrientation  orientation,
2095                                         gint           *minimum_size,
2096                                         gint           *natural_size)
2097 {
2098   GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2099   GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2100   GtkBin *bin = GTK_BIN (scrolled_window);
2101   gint extra_width;
2102   gint extra_height;
2103   gint scrollbar_spacing;
2104   GtkRequisition hscrollbar_requisition;
2105   GtkRequisition vscrollbar_requisition;
2106   GtkRequisition minimum_req, natural_req;
2107   GtkWidget *child;
2108   gint min_child_size, nat_child_size;
2109
2110   scrollbar_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
2111
2112   extra_width = 0;
2113   extra_height = 0;
2114   minimum_req.width = 0;
2115   minimum_req.height = 0;
2116   natural_req.width = 0;
2117   natural_req.height = 0;
2118
2119   gtk_widget_get_preferred_size (priv->hscrollbar,
2120                                  &hscrollbar_requisition, NULL);
2121   gtk_widget_get_preferred_size (priv->vscrollbar,
2122                                  &vscrollbar_requisition, NULL);
2123
2124   child = gtk_bin_get_child (bin);
2125   if (child && gtk_widget_get_visible (child))
2126     {
2127       if (orientation == GTK_ORIENTATION_HORIZONTAL)
2128         {
2129           gtk_widget_get_preferred_width (child,
2130                                           &min_child_size,
2131                                           &nat_child_size);
2132
2133           if (priv->hscrollbar_policy == GTK_POLICY_NEVER)
2134             {
2135               minimum_req.width += min_child_size;
2136               natural_req.width += nat_child_size;
2137             }
2138           else
2139             {
2140               gint min_content_width = priv->min_content_width;
2141
2142               if (min_content_width >= 0)
2143                 {
2144                   minimum_req.width = MAX (minimum_req.width, min_content_width);
2145                   natural_req.width = MAX (natural_req.width, min_content_width);
2146                   extra_width = -1;
2147                 }
2148               else
2149                 {
2150                   minimum_req.width += vscrollbar_requisition.width;
2151                   natural_req.width += vscrollbar_requisition.width;
2152                 }
2153             }
2154         }
2155       else /* GTK_ORIENTATION_VERTICAL */
2156         {
2157           gtk_widget_get_preferred_height (child,
2158                                            &min_child_size,
2159                                            &nat_child_size);
2160
2161           if (priv->vscrollbar_policy == GTK_POLICY_NEVER)
2162             {
2163               minimum_req.height += min_child_size;
2164               natural_req.height += nat_child_size;
2165             }
2166           else
2167             {
2168               gint min_content_height = priv->min_content_height;
2169
2170               if (min_content_height >= 0)
2171                 {
2172                   minimum_req.height = MAX (minimum_req.height, min_content_height);
2173                   natural_req.height = MAX (natural_req.height, min_content_height);
2174                   extra_height = -1;
2175                 }
2176               else
2177                 {
2178                   minimum_req.height += vscrollbar_requisition.height;
2179                   natural_req.height += vscrollbar_requisition.height;
2180                 }
2181             }
2182         }
2183     }
2184
2185   if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC ||
2186       priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
2187     {
2188       minimum_req.width = MAX (minimum_req.width, hscrollbar_requisition.width);
2189       natural_req.width = MAX (natural_req.width, hscrollbar_requisition.width);
2190       if (!extra_height || priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
2191         extra_height = scrollbar_spacing + hscrollbar_requisition.height;
2192     }
2193
2194   if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC ||
2195       priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
2196     {
2197       minimum_req.height = MAX (minimum_req.height, vscrollbar_requisition.height);
2198       natural_req.height = MAX (natural_req.height, vscrollbar_requisition.height);
2199       if (!extra_width || priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
2200         extra_width = scrollbar_spacing + vscrollbar_requisition.width;
2201     }
2202
2203   minimum_req.width  += MAX (0, extra_width);
2204   minimum_req.height += MAX (0, extra_height);
2205   natural_req.width  += MAX (0, extra_width);
2206   natural_req.height += MAX (0, extra_height);
2207
2208   if (priv->shadow_type != GTK_SHADOW_NONE)
2209     {
2210       GtkStyleContext *context;
2211       GtkStateFlags state;
2212       GtkBorder padding, border;
2213
2214       context = gtk_widget_get_style_context (GTK_WIDGET (widget));
2215       state = gtk_widget_get_state_flags (GTK_WIDGET (widget));
2216
2217       gtk_style_context_save (context);
2218       gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
2219
2220       gtk_style_context_get_padding (context, state, &padding);
2221       gtk_style_context_get_border (context, state, &border);
2222
2223       minimum_req.width += padding.left + padding.right + border.left + border.right;
2224       minimum_req.height += padding.top + padding.bottom + border.top + border.bottom;
2225       natural_req.width += padding.left + padding.right + border.left + border.right;
2226       natural_req.height += padding.top + padding.bottom + border.top + border.bottom;
2227
2228       gtk_style_context_restore (context);
2229     }
2230
2231   if (orientation == GTK_ORIENTATION_HORIZONTAL)
2232     {
2233       if (minimum_size)
2234         *minimum_size = minimum_req.width;
2235       if (natural_size)
2236         *natural_size = natural_req.width;
2237     }
2238   else
2239     {
2240       if (minimum_size)
2241         *minimum_size = minimum_req.height;
2242       if (natural_size)
2243         *natural_size = natural_req.height;
2244     }
2245 }
2246
2247 static void
2248 gtk_scrolled_window_get_preferred_width (GtkWidget *widget,
2249                                          gint      *minimum_size,
2250                                          gint      *natural_size)
2251 {
2252   gtk_scrolled_window_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
2253 }
2254
2255 static void
2256 gtk_scrolled_window_get_preferred_height (GtkWidget *widget,
2257                                           gint      *minimum_size,
2258                                           gint      *natural_size)
2259 {
2260   gtk_scrolled_window_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
2261 }
2262
2263 static void
2264 gtk_scrolled_window_get_preferred_height_for_width (GtkWidget *widget,
2265                                                     gint       width,
2266                                                     gint      *minimum_height,
2267                                                     gint      *natural_height)
2268 {
2269   g_return_if_fail (GTK_IS_WIDGET (widget));
2270
2271   GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, minimum_height, natural_height);
2272 }
2273
2274 static void
2275 gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *widget,
2276                                                     gint       height,
2277                                                     gint      *minimum_width,
2278                                                     gint      *natural_width)
2279 {
2280   g_return_if_fail (GTK_IS_WIDGET (widget));
2281
2282   GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
2283 }
2284
2285 /**
2286  * gtk_scrolled_window_get_min_content_width:
2287  * @scrolled_window: a #GtkScrolledWindow
2288  *
2289  * Gets the minimum content width of @scrolled_window, or -1 if not set.
2290  *
2291  * Returns: the minimum content width
2292  *
2293  * Since: 3.0
2294  */
2295 gint
2296 gtk_scrolled_window_get_min_content_width (GtkScrolledWindow *scrolled_window)
2297 {
2298   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
2299
2300   return scrolled_window->priv->min_content_width;
2301 }
2302
2303 /**
2304  * gtk_scrolled_window_set_min_content_width:
2305  * @scrolled_window: a #GtkScrolledWindow
2306  * @width: the minimal content width
2307  *
2308  * Sets the minimum width that @scrolled_window should keep visible.
2309  * Note that this can and (usually will) be smaller than the minimum
2310  * size of the content.
2311  *
2312  * Since: 3.0
2313  */
2314 void
2315 gtk_scrolled_window_set_min_content_width (GtkScrolledWindow *scrolled_window,
2316                                            gint               width)
2317 {
2318   GtkScrolledWindowPrivate *priv;
2319
2320   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
2321
2322   priv = scrolled_window->priv;
2323
2324   if (priv->min_content_width != width)
2325     {
2326       priv->min_content_width = width;
2327
2328       gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
2329
2330       g_object_notify (G_OBJECT (scrolled_window), "min-content-width");
2331     }
2332 }
2333
2334 /**
2335  * gtk_scrolled_window_get_min_content_height:
2336  * @scrolled_window: a #GtkScrolledWindow
2337  *
2338  * Gets the minimal content height of @scrolled_window, or -1 if not set.
2339  *
2340  * Returns: the minimal content height
2341  *
2342  * Since: 3.0
2343  */
2344 gint
2345 gtk_scrolled_window_get_min_content_height (GtkScrolledWindow *scrolled_window)
2346 {
2347   g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
2348
2349   return scrolled_window->priv->min_content_height;
2350 }
2351
2352 /**
2353  * gtk_scrolled_window_set_min_content_height:
2354  * @scrolled_window: a #GtkScrolledWindow
2355  * @height: the minimal content height
2356  *
2357  * Sets the minimum height that @scrolled_window should keep visible.
2358  * Note that this can and (usually will) be smaller than the minimum
2359  * size of the content.
2360  *
2361  * Since: 3.0
2362  */
2363 void
2364 gtk_scrolled_window_set_min_content_height (GtkScrolledWindow *scrolled_window,
2365                                             gint               height)
2366 {
2367   GtkScrolledWindowPrivate *priv;
2368
2369   g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
2370
2371   priv = scrolled_window->priv;
2372
2373   if (priv->min_content_height != height)
2374     {
2375       priv->min_content_height = height;
2376
2377       gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
2378
2379       g_object_notify (G_OBJECT (scrolled_window), "min-content-height");
2380     }
2381 }