1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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.
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.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
19 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
20 * file for a list of people on the GTK+ Team. See the ChangeLog
21 * files for a list of changes. These files are distributed with
22 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
27 #include "gtkscrolledwindow.h"
29 #include "gtkadjustment.h"
30 #include "gtkbindings.h"
34 #include "gtkmarshalers.h"
35 #include "gtkprivate.h"
36 #include "gtkscrollable.h"
37 #include "gtkscrollbar.h"
38 #include "gtktypebuiltins.h"
39 #include "gtkviewport.h"
40 #include "gtkwidgetprivate.h"
41 #include "gtkwindow.h"
42 #include "a11y/gtkscrolledwindowaccessible.h"
47 * SECTION:gtkscrolledwindow
48 * @Short_description: Adds scrollbars to its child widget
49 * @Title: GtkScrolledWindow
50 * @See_also: #GtkScrollable, #GtkViewport, #GtkAdjustment
52 * #GtkScrolledWindow is a #GtkBin subclass: it's a container
53 * the accepts a single child widget. #GtkScrolledWindow adds scrollbars
54 * to the child widget and optionally draws a beveled frame around the
57 * The scrolled window can work in two ways. Some widgets have native
58 * scrolling support; these widgets implement the #GtkScrollable interface.
59 * Widgets with native scroll support include #GtkTreeView, #GtkTextView,
62 * For widgets that lack native scrolling support, the #GtkViewport
63 * widget acts as an adaptor class, implementing scrollability for child
64 * widgets that lack their own scrolling capabilities. Use #GtkViewport
65 * to scroll child widgets such as #GtkGrid, #GtkBox, and so on.
67 * If a widget has native scrolling abilities, it can be added to the
68 * #GtkScrolledWindow with gtk_container_add(). If a widget does not, you
69 * must first add the widget to a #GtkViewport, then add the #GtkViewport
70 * to the scrolled window. The convenience function
71 * gtk_scrolled_window_add_with_viewport() does exactly this, so you can
72 * ignore the presence of the viewport.
74 * The position of the scrollbars is controlled by the scroll
75 * adjustments. See #GtkAdjustment for the fields in an adjustment - for
76 * #GtkScrollbar, used by #GtkScrolledWindow, the "value" field
77 * represents the position of the scrollbar, which must be between the
78 * "lower" field and "upper - page_size." The "page_size" field
79 * represents the size of the visible scrollable area. The
80 * "step_increment" and "page_increment" fields are used when the user
81 * asks to step down (using the small stepper arrows) or page down (using
82 * for example the PageDown key).
84 * If a #GtkScrolledWindow doesn't behave quite as you would like, or
85 * doesn't have exactly the right layout, it's very possible to set up
86 * your own scrolling with #GtkScrollbar and for example a #GtkGrid.
90 /* scrolled window policy and size requisition handling:
92 * gtk size requisition works as follows:
93 * a widget upon size-request reports the width and height that it finds
94 * to be best suited to display its contents, including children.
95 * the width and/or height reported from a widget upon size requisition
96 * may be overidden by the user by specifying a width and/or height
97 * other than 0 through gtk_widget_set_size_request().
99 * a scrolled window needs (for implementing all three policy types) to
100 * request its width and height based on two different rationales.
101 * 1) the user wants the scrolled window to just fit into the space
102 * that it gets allocated for a specifc dimension.
103 * 1.1) this does not apply if the user specified a concrete value
104 * value for that specific dimension by either specifying usize for the
105 * scrolled window or for its child.
106 * 2) the user wants the scrolled window to take as much space up as
107 * is desired by the child for a specifc dimension (i.e. POLICY_NEVER).
109 * also, kinda obvious:
110 * 3) a user would certainly not have choosen a scrolled window as a container
111 * for the child, if the resulting allocation takes up more space than the
112 * child would have allocated without the scrolled window.
115 * A) from 1) follows: the scrolled window shouldn't request more space for a
116 * specifc dimension than is required at minimum.
117 * B) from 1.1) follows: the requisition may be overidden by usize of the scrolled
118 * window (done automatically) or by usize of the child (needs to be checked).
119 * C) from 2) follows: for POLICY_NEVER, the scrolled window simply reports the
121 * D) from 3) follows: the scrolled window child's minimum width and minimum height
122 * under A) at least correspond to the space taken up by its scrollbars.
125 #define DEFAULT_SCROLLBAR_SPACING 3
126 #define TOUCH_BYPASS_CAPTURED_THRESHOLD 30
128 /* Kinetic scrolling */
129 #define FRAME_INTERVAL (1000 / 60)
130 #define MAX_OVERSHOOT_DISTANCE 50
131 #define FRICTION_DECELERATION 0.003
132 #define OVERSHOOT_INVERSE_ACCELERATION 0.003
133 #define RELEASE_EVENT_TIMEOUT 1000
135 struct _GtkScrolledWindowPrivate
137 GtkWidget *hscrollbar;
138 GtkWidget *vscrollbar;
140 GtkCornerType real_window_placement;
143 guint window_placement_set : 1;
144 guint hscrollbar_policy : 2;
145 guint vscrollbar_policy : 2;
146 guint hscrollbar_visible : 1;
147 guint vscrollbar_visible : 1;
148 guint window_placement : 2;
149 guint focus_out : 1; /* Flag used by ::move-focus-out implementation */
151 gint min_content_width;
152 gint min_content_height;
154 /* Kinetic scrolling */
155 GdkEvent *button_press_event;
156 GdkWindow *overshoot_window;
157 GdkDevice *drag_device;
158 guint kinetic_scrolling : 1;
159 guint capture_button_press : 1;
161 guint last_button_event_valid : 1;
163 guint release_timeout_id;
164 guint deceleration_id;
166 gdouble last_button_event_x_root;
167 gdouble last_button_event_y_root;
169 gdouble last_motion_event_x_root;
170 gdouble last_motion_event_y_root;
171 guint32 last_motion_event_time;
176 gdouble unclamped_hadj_value;
177 gdouble unclamped_vadj_value;
182 GtkScrolledWindow *scrolled_window;
183 gint64 last_deceleration_time;
195 PROP_HSCROLLBAR_POLICY,
196 PROP_VSCROLLBAR_POLICY,
197 PROP_WINDOW_PLACEMENT,
198 PROP_WINDOW_PLACEMENT_SET,
200 PROP_MIN_CONTENT_WIDTH,
201 PROP_MIN_CONTENT_HEIGHT,
202 PROP_KINETIC_SCROLLING
213 static void gtk_scrolled_window_set_property (GObject *object,
217 static void gtk_scrolled_window_get_property (GObject *object,
222 static void gtk_scrolled_window_destroy (GtkWidget *widget);
223 static void gtk_scrolled_window_screen_changed (GtkWidget *widget,
224 GdkScreen *previous_screen);
225 static gboolean gtk_scrolled_window_draw (GtkWidget *widget,
227 static void gtk_scrolled_window_size_allocate (GtkWidget *widget,
228 GtkAllocation *allocation);
229 static gboolean gtk_scrolled_window_scroll_event (GtkWidget *widget,
230 GdkEventScroll *event);
231 static gboolean gtk_scrolled_window_captured_event (GtkWidget *widget,
233 static gboolean gtk_scrolled_window_focus (GtkWidget *widget,
234 GtkDirectionType direction);
235 static void gtk_scrolled_window_add (GtkContainer *container,
237 static void gtk_scrolled_window_remove (GtkContainer *container,
239 static void gtk_scrolled_window_forall (GtkContainer *container,
240 gboolean include_internals,
241 GtkCallback callback,
242 gpointer callback_data);
243 static gboolean gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window,
244 GtkScrollType scroll,
245 gboolean horizontal);
246 static void gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window,
247 GtkDirectionType direction_type);
249 static void gtk_scrolled_window_relative_allocation(GtkWidget *widget,
250 GtkAllocation *allocation);
251 static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
253 static void gtk_scrolled_window_adjustment_value_changed (GtkAdjustment *adjustment,
256 static void gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window);
258 static void gtk_scrolled_window_get_preferred_width (GtkWidget *widget,
261 static void gtk_scrolled_window_get_preferred_height (GtkWidget *widget,
264 static void gtk_scrolled_window_get_preferred_height_for_width (GtkWidget *layout,
266 gint *minimum_height,
267 gint *natural_height);
268 static void gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *layout,
270 gint *minimum_height,
271 gint *natural_height);
273 static void gtk_scrolled_window_realize (GtkWidget *widget);
274 static void gtk_scrolled_window_unrealize (GtkWidget *widget);
275 static void gtk_scrolled_window_map (GtkWidget *widget);
276 static void gtk_scrolled_window_unmap (GtkWidget *widget);
278 static void gtk_scrolled_window_grab_notify (GtkWidget *widget,
279 gboolean was_grabbed);
281 static gboolean _gtk_scrolled_window_set_adjustment_value (GtkScrolledWindow *scrolled_window,
282 GtkAdjustment *adjustment,
284 gboolean allow_overshooting,
285 gboolean snap_to_border);
287 static guint signals[LAST_SIGNAL] = {0};
289 G_DEFINE_TYPE (GtkScrolledWindow, gtk_scrolled_window, GTK_TYPE_BIN)
293 add_scroll_binding (GtkBindingSet *binding_set,
295 GdkModifierType mask,
296 GtkScrollType scroll,
299 guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
301 gtk_binding_entry_add_signal (binding_set, keyval, mask,
303 GTK_TYPE_SCROLL_TYPE, scroll,
304 G_TYPE_BOOLEAN, horizontal);
305 gtk_binding_entry_add_signal (binding_set, keypad_keyval, mask,
307 GTK_TYPE_SCROLL_TYPE, scroll,
308 G_TYPE_BOOLEAN, horizontal);
312 add_tab_bindings (GtkBindingSet *binding_set,
313 GdkModifierType modifiers,
314 GtkDirectionType direction)
316 gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, modifiers,
318 GTK_TYPE_DIRECTION_TYPE, direction);
319 gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, modifiers,
321 GTK_TYPE_DIRECTION_TYPE, direction);
325 gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
327 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
328 GtkWidgetClass *widget_class;
329 GtkContainerClass *container_class;
330 GtkBindingSet *binding_set;
332 widget_class = (GtkWidgetClass*) class;
333 container_class = (GtkContainerClass*) class;
335 gobject_class->set_property = gtk_scrolled_window_set_property;
336 gobject_class->get_property = gtk_scrolled_window_get_property;
338 widget_class->destroy = gtk_scrolled_window_destroy;
339 widget_class->screen_changed = gtk_scrolled_window_screen_changed;
340 widget_class->draw = gtk_scrolled_window_draw;
341 widget_class->size_allocate = gtk_scrolled_window_size_allocate;
342 widget_class->scroll_event = gtk_scrolled_window_scroll_event;
343 widget_class->focus = gtk_scrolled_window_focus;
344 widget_class->get_preferred_width = gtk_scrolled_window_get_preferred_width;
345 widget_class->get_preferred_height = gtk_scrolled_window_get_preferred_height;
346 widget_class->get_preferred_height_for_width = gtk_scrolled_window_get_preferred_height_for_width;
347 widget_class->get_preferred_width_for_height = gtk_scrolled_window_get_preferred_width_for_height;
348 widget_class->realize = gtk_scrolled_window_realize;
349 widget_class->unrealize = gtk_scrolled_window_unrealize;
350 widget_class->map = gtk_scrolled_window_map;
351 widget_class->unmap = gtk_scrolled_window_unmap;
352 widget_class->grab_notify = gtk_scrolled_window_grab_notify;
354 container_class->add = gtk_scrolled_window_add;
355 container_class->remove = gtk_scrolled_window_remove;
356 container_class->forall = gtk_scrolled_window_forall;
357 gtk_container_class_handle_border_width (container_class);
359 class->scrollbar_spacing = -1;
361 class->scroll_child = gtk_scrolled_window_scroll_child;
362 class->move_focus_out = gtk_scrolled_window_move_focus_out;
364 g_object_class_install_property (gobject_class,
366 g_param_spec_object ("hadjustment",
367 P_("Horizontal Adjustment"),
368 P_("The GtkAdjustment for the horizontal position"),
370 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
371 g_object_class_install_property (gobject_class,
373 g_param_spec_object ("vadjustment",
374 P_("Vertical Adjustment"),
375 P_("The GtkAdjustment for the vertical position"),
377 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
378 g_object_class_install_property (gobject_class,
379 PROP_HSCROLLBAR_POLICY,
380 g_param_spec_enum ("hscrollbar-policy",
381 P_("Horizontal Scrollbar Policy"),
382 P_("When the horizontal scrollbar is displayed"),
383 GTK_TYPE_POLICY_TYPE,
384 GTK_POLICY_AUTOMATIC,
385 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
386 g_object_class_install_property (gobject_class,
387 PROP_VSCROLLBAR_POLICY,
388 g_param_spec_enum ("vscrollbar-policy",
389 P_("Vertical Scrollbar Policy"),
390 P_("When the vertical scrollbar is displayed"),
391 GTK_TYPE_POLICY_TYPE,
392 GTK_POLICY_AUTOMATIC,
393 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
395 g_object_class_install_property (gobject_class,
396 PROP_WINDOW_PLACEMENT,
397 g_param_spec_enum ("window-placement",
398 P_("Window Placement"),
399 P_("Where the contents are located with respect to the scrollbars. This property only takes effect if \"window-placement-set\" is TRUE."),
400 GTK_TYPE_CORNER_TYPE,
402 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
405 * GtkScrolledWindow:window-placement-set:
407 * Whether "window-placement" should be used to determine the location
408 * of the contents with respect to the scrollbars. Otherwise, the
409 * "gtk-scrolled-window-placement" setting is used.
413 g_object_class_install_property (gobject_class,
414 PROP_WINDOW_PLACEMENT_SET,
415 g_param_spec_boolean ("window-placement-set",
416 P_("Window Placement Set"),
417 P_("Whether \"window-placement\" should be used to determine the location of the contents with respect to the scrollbars."),
419 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
420 g_object_class_install_property (gobject_class,
422 g_param_spec_enum ("shadow-type",
424 P_("Style of bevel around the contents"),
425 GTK_TYPE_SHADOW_TYPE,
427 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
430 * GtkScrolledWindow:scrollbars-within-bevel:
432 * Whether to place scrollbars within the scrolled window's bevel.
436 gtk_widget_class_install_style_property (widget_class,
437 g_param_spec_boolean ("scrollbars-within-bevel",
438 P_("Scrollbars within bevel"),
439 P_("Place scrollbars within the scrolled window's bevel"),
441 GTK_PARAM_READABLE));
443 gtk_widget_class_install_style_property (widget_class,
444 g_param_spec_int ("scrollbar-spacing",
445 P_("Scrollbar spacing"),
446 P_("Number of pixels between the scrollbars and the scrolled window"),
449 DEFAULT_SCROLLBAR_SPACING,
450 GTK_PARAM_READABLE));
453 * GtkScrolledWindow:min-content-width:
455 * The minimum content width of @scrolled_window, or -1 if not set.
459 g_object_class_install_property (gobject_class,
460 PROP_MIN_CONTENT_WIDTH,
461 g_param_spec_int ("min-content-width",
462 P_("Minimum Content Width"),
463 P_("The minimum width that the scrolled window will allocate to its content"),
465 GTK_PARAM_READWRITE));
468 * GtkScrolledWindow:min-content-height:
470 * The minimum content height of @scrolled_window, or -1 if not set.
474 g_object_class_install_property (gobject_class,
475 PROP_MIN_CONTENT_HEIGHT,
476 g_param_spec_int ("min-content-height",
477 P_("Minimum Content Height"),
478 P_("The minimum height that the scrolled window will allocate to its content"),
480 GTK_PARAM_READWRITE));
483 * GtkScrolledWindow:kinetic-scrolling:
485 * The kinetic scrolling behavior flags. Kinetic scrolling
486 * only applies to devices with source %GDK_SOURCE_TOUCHSCREEN
490 g_object_class_install_property (gobject_class,
491 PROP_KINETIC_SCROLLING,
492 g_param_spec_boolean ("kinetic-scrolling",
493 P_("Kinetic Scrolling"),
494 P_("Kinetic scrolling mode."),
497 GTK_PARAM_WRITABLE));
499 * GtkScrolledWindow::scroll-child:
500 * @scrolled_window: a #GtkScrolledWindow
501 * @scroll: a #GtkScrollType describing how much to scroll
502 * @horizontal: whether the keybinding scrolls the child
503 * horizontally or not
505 * The ::scroll-child signal is a
506 * <link linkend="keybinding-signals">keybinding signal</link>
507 * which gets emitted when a keybinding that scrolls is pressed.
508 * The horizontal or vertical adjustment is updated which triggers a
509 * signal that the scrolled windows child may listen to and scroll itself.
511 signals[SCROLL_CHILD] =
512 g_signal_new (I_("scroll-child"),
513 G_TYPE_FROM_CLASS (gobject_class),
514 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
515 G_STRUCT_OFFSET (GtkScrolledWindowClass, scroll_child),
517 _gtk_marshal_BOOLEAN__ENUM_BOOLEAN,
519 GTK_TYPE_SCROLL_TYPE,
523 * GtkScrolledWindow::move-focus-out:
524 * @scrolled_window: a #GtkScrolledWindow
525 * @direction_type: either %GTK_DIR_TAB_FORWARD or
526 * %GTK_DIR_TAB_BACKWARD
528 * The ::move-focus-out signal is a
529 * <link linkend="keybinding-signals">keybinding signal</link>
530 * which gets emitted when focus is moved away from the scrolled
531 * window by a keybinding.
532 * The #GtkWidget::move-focus signal is emitted with @direction_type
533 * on this scrolled windows toplevel parent in the container hierarchy.
534 * The default bindings for this signal are
535 * <keycombo><keycap>Tab</keycap><keycap>Ctrl</keycap></keycombo>
537 * <keycombo><keycap>Tab</keycap><keycap>Ctrl</keycap><keycap>Shift</keycap></keycombo>.
539 signals[MOVE_FOCUS_OUT] =
540 g_signal_new (I_("move-focus-out"),
541 G_TYPE_FROM_CLASS (gobject_class),
542 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
543 G_STRUCT_OFFSET (GtkScrolledWindowClass, move_focus_out),
545 _gtk_marshal_VOID__ENUM,
547 GTK_TYPE_DIRECTION_TYPE);
549 binding_set = gtk_binding_set_by_class (class);
551 add_scroll_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, TRUE);
552 add_scroll_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD, TRUE);
553 add_scroll_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, FALSE);
554 add_scroll_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD, FALSE);
556 add_scroll_binding (binding_set, GDK_KEY_Page_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_BACKWARD, TRUE);
557 add_scroll_binding (binding_set, GDK_KEY_Page_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_FORWARD, TRUE);
558 add_scroll_binding (binding_set, GDK_KEY_Page_Up, 0, GTK_SCROLL_PAGE_BACKWARD, FALSE);
559 add_scroll_binding (binding_set, GDK_KEY_Page_Down, 0, GTK_SCROLL_PAGE_FORWARD, FALSE);
561 add_scroll_binding (binding_set, GDK_KEY_Home, GDK_CONTROL_MASK, GTK_SCROLL_START, TRUE);
562 add_scroll_binding (binding_set, GDK_KEY_End, GDK_CONTROL_MASK, GTK_SCROLL_END, TRUE);
563 add_scroll_binding (binding_set, GDK_KEY_Home, 0, GTK_SCROLL_START, FALSE);
564 add_scroll_binding (binding_set, GDK_KEY_End, 0, GTK_SCROLL_END, FALSE);
566 add_tab_bindings (binding_set, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD);
567 add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
569 g_type_class_add_private (class, sizeof (GtkScrolledWindowPrivate));
571 gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCROLLED_WINDOW_ACCESSIBLE);
575 gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
577 GtkScrolledWindowPrivate *priv;
579 scrolled_window->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (scrolled_window,
580 GTK_TYPE_SCROLLED_WINDOW,
581 GtkScrolledWindowPrivate);
583 gtk_widget_set_has_window (GTK_WIDGET (scrolled_window), FALSE);
584 gtk_widget_set_can_focus (GTK_WIDGET (scrolled_window), TRUE);
586 priv->hscrollbar = NULL;
587 priv->vscrollbar = NULL;
588 priv->hscrollbar_policy = GTK_POLICY_AUTOMATIC;
589 priv->vscrollbar_policy = GTK_POLICY_AUTOMATIC;
590 priv->hscrollbar_visible = FALSE;
591 priv->vscrollbar_visible = FALSE;
592 priv->focus_out = FALSE;
593 priv->window_placement = GTK_CORNER_TOP_LEFT;
594 gtk_scrolled_window_update_real_placement (scrolled_window);
595 priv->min_content_width = -1;
596 priv->min_content_height = -1;
598 gtk_scrolled_window_set_kinetic_scrolling (scrolled_window, TRUE);
599 gtk_scrolled_window_set_capture_button_press (scrolled_window, TRUE);
603 * gtk_scrolled_window_new:
604 * @hadjustment: (allow-none): horizontal adjustment
605 * @vadjustment: (allow-none): vertical adjustment
607 * Creates a new scrolled window.
609 * The two arguments are the scrolled window's adjustments; these will be
610 * shared with the scrollbars and the child widget to keep the bars in sync
611 * with the child. Usually you want to pass %NULL for the adjustments, which
612 * will cause the scrolled window to create them for you.
614 * Returns: a new scrolled window
617 gtk_scrolled_window_new (GtkAdjustment *hadjustment,
618 GtkAdjustment *vadjustment)
620 GtkWidget *scrolled_window;
623 g_return_val_if_fail (GTK_IS_ADJUSTMENT (hadjustment), NULL);
626 g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadjustment), NULL);
628 scrolled_window = g_object_new (GTK_TYPE_SCROLLED_WINDOW,
629 "hadjustment", hadjustment,
630 "vadjustment", vadjustment,
633 return scrolled_window;
637 * gtk_scrolled_window_set_hadjustment:
638 * @scrolled_window: a #GtkScrolledWindow
639 * @hadjustment: horizontal scroll adjustment
641 * Sets the #GtkAdjustment for the horizontal scrollbar.
644 gtk_scrolled_window_set_hadjustment (GtkScrolledWindow *scrolled_window,
645 GtkAdjustment *hadjustment)
647 GtkScrolledWindowPrivate *priv;
651 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
653 g_return_if_fail (GTK_IS_ADJUSTMENT (hadjustment));
655 hadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
657 bin = GTK_BIN (scrolled_window);
658 priv = scrolled_window->priv;
660 if (!priv->hscrollbar)
662 gtk_widget_push_composite_child ();
663 priv->hscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_HORIZONTAL, hadjustment);
664 gtk_widget_set_composite_name (priv->hscrollbar, "hscrollbar");
665 gtk_widget_pop_composite_child ();
667 gtk_widget_set_parent (priv->hscrollbar, GTK_WIDGET (scrolled_window));
668 g_object_ref (priv->hscrollbar);
669 gtk_widget_show (priv->hscrollbar);
673 GtkAdjustment *old_adjustment;
675 old_adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
676 if (old_adjustment == hadjustment)
679 g_signal_handlers_disconnect_by_func (old_adjustment,
680 gtk_scrolled_window_adjustment_changed,
682 gtk_range_set_adjustment (GTK_RANGE (priv->hscrollbar),
685 hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
686 g_signal_connect (hadjustment,
688 G_CALLBACK (gtk_scrolled_window_adjustment_changed),
690 g_signal_connect (hadjustment,
692 G_CALLBACK (gtk_scrolled_window_adjustment_value_changed),
694 gtk_scrolled_window_adjustment_changed (hadjustment, scrolled_window);
695 gtk_scrolled_window_adjustment_value_changed (hadjustment, scrolled_window);
697 child = gtk_bin_get_child (bin);
698 if (GTK_IS_SCROLLABLE (child))
699 gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (child), hadjustment);
701 g_object_notify (G_OBJECT (scrolled_window), "hadjustment");
705 * gtk_scrolled_window_set_vadjustment:
706 * @scrolled_window: a #GtkScrolledWindow
707 * @vadjustment: vertical scroll adjustment
709 * Sets the #GtkAdjustment for the vertical scrollbar.
712 gtk_scrolled_window_set_vadjustment (GtkScrolledWindow *scrolled_window,
713 GtkAdjustment *vadjustment)
715 GtkScrolledWindowPrivate *priv;
719 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
721 g_return_if_fail (GTK_IS_ADJUSTMENT (vadjustment));
723 vadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
725 bin = GTK_BIN (scrolled_window);
726 priv = scrolled_window->priv;
728 if (!priv->vscrollbar)
730 gtk_widget_push_composite_child ();
731 priv->vscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, vadjustment);
732 gtk_widget_set_composite_name (priv->vscrollbar, "vscrollbar");
733 gtk_widget_pop_composite_child ();
735 gtk_widget_set_parent (priv->vscrollbar, GTK_WIDGET (scrolled_window));
736 g_object_ref (priv->vscrollbar);
737 gtk_widget_show (priv->vscrollbar);
741 GtkAdjustment *old_adjustment;
743 old_adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
744 if (old_adjustment == vadjustment)
747 g_signal_handlers_disconnect_by_func (old_adjustment,
748 gtk_scrolled_window_adjustment_changed,
750 gtk_range_set_adjustment (GTK_RANGE (priv->vscrollbar),
753 vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
754 g_signal_connect (vadjustment,
756 G_CALLBACK (gtk_scrolled_window_adjustment_changed),
758 g_signal_connect (vadjustment,
760 G_CALLBACK (gtk_scrolled_window_adjustment_value_changed),
762 gtk_scrolled_window_adjustment_changed (vadjustment, scrolled_window);
763 gtk_scrolled_window_adjustment_value_changed (vadjustment, scrolled_window);
765 child = gtk_bin_get_child (bin);
766 if (GTK_IS_SCROLLABLE (child))
767 gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (child), vadjustment);
769 g_object_notify (G_OBJECT (scrolled_window), "vadjustment");
773 * gtk_scrolled_window_get_hadjustment:
774 * @scrolled_window: a #GtkScrolledWindow
776 * Returns the horizontal scrollbar's adjustment, used to connect the
777 * horizontal scrollbar to the child widget's horizontal scroll
780 * Returns: (transfer none): the horizontal #GtkAdjustment
783 gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window)
785 GtkScrolledWindowPrivate *priv;
787 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
789 priv = scrolled_window->priv;
791 return (priv->hscrollbar ?
792 gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)) :
797 * gtk_scrolled_window_get_vadjustment:
798 * @scrolled_window: a #GtkScrolledWindow
800 * Returns the vertical scrollbar's adjustment, used to connect the
801 * vertical scrollbar to the child widget's vertical scroll functionality.
803 * Returns: (transfer none): the vertical #GtkAdjustment
806 gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window)
808 GtkScrolledWindowPrivate *priv;
810 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
812 priv = scrolled_window->priv;
814 return (priv->vscrollbar ?
815 gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)) :
820 * gtk_scrolled_window_get_hscrollbar:
821 * @scrolled_window: a #GtkScrolledWindow
823 * Returns the horizontal scrollbar of @scrolled_window.
825 * Returns: (transfer none): the horizontal scrollbar of the scrolled window,
826 * or %NULL if it does not have one.
831 gtk_scrolled_window_get_hscrollbar (GtkScrolledWindow *scrolled_window)
833 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
835 return scrolled_window->priv->hscrollbar;
839 * gtk_scrolled_window_get_vscrollbar:
840 * @scrolled_window: a #GtkScrolledWindow
842 * Returns the vertical scrollbar of @scrolled_window.
844 * Returns: (transfer none): the vertical scrollbar of the scrolled window,
845 * or %NULL if it does not have one.
850 gtk_scrolled_window_get_vscrollbar (GtkScrolledWindow *scrolled_window)
852 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
854 return scrolled_window->priv->vscrollbar;
858 * gtk_scrolled_window_set_policy:
859 * @scrolled_window: a #GtkScrolledWindow
860 * @hscrollbar_policy: policy for horizontal bar
861 * @vscrollbar_policy: policy for vertical bar
863 * Sets the scrollbar policy for the horizontal and vertical scrollbars.
865 * The policy determines when the scrollbar should appear; it is a value
866 * from the #GtkPolicyType enumeration. If %GTK_POLICY_ALWAYS, the
867 * scrollbar is always present; if %GTK_POLICY_NEVER, the scrollbar is
868 * never present; if %GTK_POLICY_AUTOMATIC, the scrollbar is present only
869 * if needed (that is, if the slider part of the bar would be smaller
870 * than the trough - the display is larger than the page size).
873 gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window,
874 GtkPolicyType hscrollbar_policy,
875 GtkPolicyType vscrollbar_policy)
877 GtkScrolledWindowPrivate *priv;
878 GObject *object = G_OBJECT (scrolled_window);
880 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
882 priv = scrolled_window->priv;
884 if ((priv->hscrollbar_policy != hscrollbar_policy) ||
885 (priv->vscrollbar_policy != vscrollbar_policy))
887 priv->hscrollbar_policy = hscrollbar_policy;
888 priv->vscrollbar_policy = vscrollbar_policy;
890 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
892 g_object_freeze_notify (object);
893 g_object_notify (object, "hscrollbar-policy");
894 g_object_notify (object, "vscrollbar-policy");
895 g_object_thaw_notify (object);
900 * gtk_scrolled_window_get_policy:
901 * @scrolled_window: a #GtkScrolledWindow
902 * @hscrollbar_policy: (out) (allow-none): location to store the policy
903 * for the horizontal scrollbar, or %NULL.
904 * @vscrollbar_policy: (out) (allow-none): location to store the policy
905 * for the vertical scrollbar, or %NULL.
907 * Retrieves the current policy values for the horizontal and vertical
908 * scrollbars. See gtk_scrolled_window_set_policy().
911 gtk_scrolled_window_get_policy (GtkScrolledWindow *scrolled_window,
912 GtkPolicyType *hscrollbar_policy,
913 GtkPolicyType *vscrollbar_policy)
915 GtkScrolledWindowPrivate *priv;
917 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
919 priv = scrolled_window->priv;
921 if (hscrollbar_policy)
922 *hscrollbar_policy = priv->hscrollbar_policy;
923 if (vscrollbar_policy)
924 *vscrollbar_policy = priv->vscrollbar_policy;
928 gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window)
930 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
931 GtkSettings *settings;
933 settings = gtk_widget_get_settings (GTK_WIDGET (scrolled_window));
935 if (priv->window_placement_set || settings == NULL)
936 priv->real_window_placement = priv->window_placement;
938 g_object_get (settings,
939 "gtk-scrolled-window-placement",
940 &priv->real_window_placement,
945 gtk_scrolled_window_set_placement_internal (GtkScrolledWindow *scrolled_window,
946 GtkCornerType window_placement)
948 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
950 if (priv->window_placement != window_placement)
952 priv->window_placement = window_placement;
954 gtk_scrolled_window_update_real_placement (scrolled_window);
955 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
957 g_object_notify (G_OBJECT (scrolled_window), "window-placement");
962 gtk_scrolled_window_set_placement_set (GtkScrolledWindow *scrolled_window,
963 gboolean placement_set,
964 gboolean emit_resize)
966 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
968 if (priv->window_placement_set != placement_set)
970 priv->window_placement_set = placement_set;
972 gtk_scrolled_window_update_real_placement (scrolled_window);
974 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
976 g_object_notify (G_OBJECT (scrolled_window), "window-placement-set");
981 * gtk_scrolled_window_set_placement:
982 * @scrolled_window: a #GtkScrolledWindow
983 * @window_placement: position of the child window
985 * Sets the placement of the contents with respect to the scrollbars
986 * for the scrolled window.
988 * The default is %GTK_CORNER_TOP_LEFT, meaning the child is
989 * in the top left, with the scrollbars underneath and to the right.
990 * Other values in #GtkCornerType are %GTK_CORNER_TOP_RIGHT,
991 * %GTK_CORNER_BOTTOM_LEFT, and %GTK_CORNER_BOTTOM_RIGHT.
993 * See also gtk_scrolled_window_get_placement() and
994 * gtk_scrolled_window_unset_placement().
997 gtk_scrolled_window_set_placement (GtkScrolledWindow *scrolled_window,
998 GtkCornerType window_placement)
1000 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1002 gtk_scrolled_window_set_placement_set (scrolled_window, TRUE, FALSE);
1003 gtk_scrolled_window_set_placement_internal (scrolled_window, window_placement);
1007 * gtk_scrolled_window_get_placement:
1008 * @scrolled_window: a #GtkScrolledWindow
1010 * Gets the placement of the contents with respect to the scrollbars
1011 * for the scrolled window. See gtk_scrolled_window_set_placement().
1013 * Return value: the current placement value.
1015 * See also gtk_scrolled_window_set_placement() and
1016 * gtk_scrolled_window_unset_placement().
1019 gtk_scrolled_window_get_placement (GtkScrolledWindow *scrolled_window)
1021 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_CORNER_TOP_LEFT);
1023 return scrolled_window->priv->window_placement;
1027 * gtk_scrolled_window_unset_placement:
1028 * @scrolled_window: a #GtkScrolledWindow
1030 * Unsets the placement of the contents with respect to the scrollbars
1031 * for the scrolled window. If no window placement is set for a scrolled
1032 * window, it obeys the "gtk-scrolled-window-placement" XSETTING.
1034 * See also gtk_scrolled_window_set_placement() and
1035 * gtk_scrolled_window_get_placement().
1040 gtk_scrolled_window_unset_placement (GtkScrolledWindow *scrolled_window)
1042 GtkScrolledWindowPrivate *priv;
1044 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1046 priv = scrolled_window->priv;
1048 if (priv->window_placement_set)
1050 priv->window_placement_set = FALSE;
1052 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
1054 g_object_notify (G_OBJECT (scrolled_window), "window-placement-set");
1059 * gtk_scrolled_window_set_shadow_type:
1060 * @scrolled_window: a #GtkScrolledWindow
1061 * @type: kind of shadow to draw around scrolled window contents
1063 * Changes the type of shadow drawn around the contents of
1068 gtk_scrolled_window_set_shadow_type (GtkScrolledWindow *scrolled_window,
1071 GtkScrolledWindowPrivate *priv;
1073 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1074 g_return_if_fail (type >= GTK_SHADOW_NONE && type <= GTK_SHADOW_ETCHED_OUT);
1076 priv = scrolled_window->priv;
1078 if (priv->shadow_type != type)
1080 priv->shadow_type = type;
1082 if (gtk_widget_is_drawable (GTK_WIDGET (scrolled_window)))
1083 gtk_widget_queue_draw (GTK_WIDGET (scrolled_window));
1085 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
1087 g_object_notify (G_OBJECT (scrolled_window), "shadow-type");
1092 * gtk_scrolled_window_get_shadow_type:
1093 * @scrolled_window: a #GtkScrolledWindow
1095 * Gets the shadow type of the scrolled window. See
1096 * gtk_scrolled_window_set_shadow_type().
1098 * Return value: the current shadow type
1101 gtk_scrolled_window_get_shadow_type (GtkScrolledWindow *scrolled_window)
1103 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_SHADOW_NONE);
1105 return scrolled_window->priv->shadow_type;
1109 * gtk_scrolled_window_set_kinetic_scrolling:
1110 * @scrolled_window: a #GtkScrolledWindow
1111 * @kinetic_scrolling: %TRUE to enable kinetic scrolling
1113 * Turns kinetic scrolling on or off.
1114 * Kinetic scrolling only applies to devices with source
1115 * %GDK_SOURCE_TOUCHSCREEN.
1120 gtk_scrolled_window_set_kinetic_scrolling (GtkScrolledWindow *scrolled_window,
1121 gboolean kinetic_scrolling)
1123 GtkScrolledWindowPrivate *priv;
1125 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1127 priv = scrolled_window->priv;
1128 if (priv->kinetic_scrolling == kinetic_scrolling)
1131 priv->kinetic_scrolling = kinetic_scrolling;
1132 if (priv->kinetic_scrolling)
1134 _gtk_widget_set_captured_event_handler (GTK_WIDGET (scrolled_window),
1135 gtk_scrolled_window_captured_event);
1139 _gtk_widget_set_captured_event_handler (GTK_WIDGET (scrolled_window), NULL);
1140 if (priv->release_timeout_id)
1142 g_source_remove (priv->release_timeout_id);
1143 priv->release_timeout_id = 0;
1145 if (priv->deceleration_id)
1147 g_source_remove (priv->deceleration_id);
1148 priv->deceleration_id = 0;
1151 g_object_notify (G_OBJECT (scrolled_window), "kinetic-scrolling");
1155 * gtk_scrolled_window_get_kinetic_scrolling:
1156 * @scrolled_window: a #GtkScrolledWindow
1158 * Returns the specified kinetic scrolling behavior.
1160 * Return value: the scrolling behavior flags.
1165 gtk_scrolled_window_get_kinetic_scrolling (GtkScrolledWindow *scrolled_window)
1167 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), FALSE);
1169 return scrolled_window->priv->kinetic_scrolling;
1173 * gtk_scrolled_window_set_capture_button_press:
1174 * @scrolled_window: a #GtkScrolledWindow
1175 * @capture_button_press: %TRUE to capture button presses
1177 * Changes the behaviour of @scrolled_window wrt. to the initial
1178 * event that possibly starts kinetic scrolling. When @capture_button_press
1179 * is set to %TRUE, the event is captured by the scrolled window, and
1180 * then later replayed if it is meant to go to the child widget.
1182 * This should be enabled if any child widgets perform non-reversible
1183 * actions on #GtkWidget::button-press-event. If they don't, and handle
1184 * additionally handle #GtkWidget::grab-broken-event, it might be better
1185 * to set @capture_button_press to %FALSE.
1187 * This setting only has an effect if kinetic scrolling is enabled.
1192 gtk_scrolled_window_set_capture_button_press (GtkScrolledWindow *scrolled_window,
1193 gboolean capture_button_press)
1195 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1197 scrolled_window->priv->capture_button_press = capture_button_press;
1201 * gtk_scrolled_window_get_capture_button_press:
1202 * @scrolled_window: a #GtkScrolledWindow
1204 * Return whether button presses are captured during kinetic
1205 * scrolling. See gtk_scrolled_window_set_capture_button_press().
1207 * Returns: %TRUE if button presses are captured during kinetic scrolling
1212 gtk_scrolled_window_get_capture_button_press (GtkScrolledWindow *scrolled_window)
1214 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), FALSE);
1216 return scrolled_window->priv->capture_button_press;
1221 gtk_scrolled_window_destroy (GtkWidget *widget)
1223 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
1224 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1226 if (priv->hscrollbar)
1228 g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)),
1229 gtk_scrolled_window_adjustment_changed,
1231 gtk_widget_unparent (priv->hscrollbar);
1232 gtk_widget_destroy (priv->hscrollbar);
1233 g_object_unref (priv->hscrollbar);
1234 priv->hscrollbar = NULL;
1236 if (priv->vscrollbar)
1238 g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)),
1239 gtk_scrolled_window_adjustment_changed,
1241 gtk_widget_unparent (priv->vscrollbar);
1242 gtk_widget_destroy (priv->vscrollbar);
1243 g_object_unref (priv->vscrollbar);
1244 priv->vscrollbar = NULL;
1247 if (priv->release_timeout_id)
1249 g_source_remove (priv->release_timeout_id);
1250 priv->release_timeout_id = 0;
1252 if (priv->deceleration_id)
1254 g_source_remove (priv->deceleration_id);
1255 priv->deceleration_id = 0;
1258 if (priv->button_press_event)
1260 gdk_event_free (priv->button_press_event);
1261 priv->button_press_event = NULL;
1264 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->destroy (widget);
1268 gtk_scrolled_window_set_property (GObject *object,
1270 const GValue *value,
1273 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
1274 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1278 case PROP_HADJUSTMENT:
1279 gtk_scrolled_window_set_hadjustment (scrolled_window,
1280 g_value_get_object (value));
1282 case PROP_VADJUSTMENT:
1283 gtk_scrolled_window_set_vadjustment (scrolled_window,
1284 g_value_get_object (value));
1286 case PROP_HSCROLLBAR_POLICY:
1287 gtk_scrolled_window_set_policy (scrolled_window,
1288 g_value_get_enum (value),
1289 priv->vscrollbar_policy);
1291 case PROP_VSCROLLBAR_POLICY:
1292 gtk_scrolled_window_set_policy (scrolled_window,
1293 priv->hscrollbar_policy,
1294 g_value_get_enum (value));
1296 case PROP_WINDOW_PLACEMENT:
1297 gtk_scrolled_window_set_placement_internal (scrolled_window,
1298 g_value_get_enum (value));
1300 case PROP_WINDOW_PLACEMENT_SET:
1301 gtk_scrolled_window_set_placement_set (scrolled_window,
1302 g_value_get_boolean (value),
1305 case PROP_SHADOW_TYPE:
1306 gtk_scrolled_window_set_shadow_type (scrolled_window,
1307 g_value_get_enum (value));
1309 case PROP_MIN_CONTENT_WIDTH:
1310 gtk_scrolled_window_set_min_content_width (scrolled_window,
1311 g_value_get_int (value));
1313 case PROP_MIN_CONTENT_HEIGHT:
1314 gtk_scrolled_window_set_min_content_height (scrolled_window,
1315 g_value_get_int (value));
1317 case PROP_KINETIC_SCROLLING:
1318 gtk_scrolled_window_set_kinetic_scrolling (scrolled_window,
1319 g_value_get_boolean (value));
1322 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1328 gtk_scrolled_window_get_property (GObject *object,
1333 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
1334 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1338 case PROP_HADJUSTMENT:
1339 g_value_set_object (value,
1340 G_OBJECT (gtk_scrolled_window_get_hadjustment (scrolled_window)));
1342 case PROP_VADJUSTMENT:
1343 g_value_set_object (value,
1344 G_OBJECT (gtk_scrolled_window_get_vadjustment (scrolled_window)));
1346 case PROP_WINDOW_PLACEMENT:
1347 g_value_set_enum (value, priv->window_placement);
1349 case PROP_WINDOW_PLACEMENT_SET:
1350 g_value_set_boolean (value, priv->window_placement_set);
1352 case PROP_SHADOW_TYPE:
1353 g_value_set_enum (value, priv->shadow_type);
1355 case PROP_HSCROLLBAR_POLICY:
1356 g_value_set_enum (value, priv->hscrollbar_policy);
1358 case PROP_VSCROLLBAR_POLICY:
1359 g_value_set_enum (value, priv->vscrollbar_policy);
1361 case PROP_MIN_CONTENT_WIDTH:
1362 g_value_set_int (value, priv->min_content_width);
1364 case PROP_MIN_CONTENT_HEIGHT:
1365 g_value_set_int (value, priv->min_content_height);
1367 case PROP_KINETIC_SCROLLING:
1368 g_value_set_boolean (value, priv->kinetic_scrolling);
1371 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1377 traverse_container (GtkWidget *widget,
1380 if (GTK_IS_SCROLLED_WINDOW (widget))
1382 gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget));
1383 gtk_widget_queue_resize (widget);
1385 else if (GTK_IS_CONTAINER (widget))
1386 gtk_container_forall (GTK_CONTAINER (widget), traverse_container, NULL);
1390 gtk_scrolled_window_settings_changed (GtkSettings *settings)
1394 list = gtk_window_list_toplevels ();
1396 for (l = list; l; l = l->next)
1397 gtk_container_forall (GTK_CONTAINER (l->data),
1398 traverse_container, NULL);
1404 gtk_scrolled_window_screen_changed (GtkWidget *widget,
1405 GdkScreen *previous_screen)
1407 GtkSettings *settings;
1408 guint window_placement_connection;
1410 gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget));
1412 if (!gtk_widget_has_screen (widget))
1415 settings = gtk_widget_get_settings (widget);
1417 window_placement_connection =
1418 GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (settings),
1419 "gtk-scrolled-window-connection"));
1421 if (window_placement_connection)
1424 window_placement_connection =
1425 g_signal_connect (settings, "notify::gtk-scrolled-window-placement",
1426 G_CALLBACK (gtk_scrolled_window_settings_changed), NULL);
1427 g_object_set_data (G_OBJECT (settings),
1428 I_("gtk-scrolled-window-connection"),
1429 GUINT_TO_POINTER (window_placement_connection));
1433 gtk_scrolled_window_draw_scrollbars_junction (GtkScrolledWindow *scrolled_window,
1436 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1437 GtkWidget *widget = GTK_WIDGET (scrolled_window);
1438 GtkAllocation wid_allocation, hscr_allocation, vscr_allocation;
1439 GtkStyleContext *context;
1440 GdkRectangle junction_rect;
1441 gboolean is_rtl, scrollbars_within_bevel;
1443 is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
1444 gtk_widget_get_allocation (widget, &wid_allocation);
1445 gtk_widget_get_allocation (GTK_WIDGET (priv->hscrollbar), &hscr_allocation);
1446 gtk_widget_get_allocation (GTK_WIDGET (priv->vscrollbar), &vscr_allocation);
1448 gtk_widget_style_get (widget,
1449 "scrollbars-within-bevel", &scrollbars_within_bevel,
1451 context = gtk_widget_get_style_context (widget);
1453 if (scrollbars_within_bevel &&
1454 priv->shadow_type != GTK_SHADOW_NONE)
1456 GtkStateFlags state;
1457 GtkBorder padding, border;
1459 state = gtk_widget_get_state_flags (widget);
1461 gtk_style_context_save (context);
1462 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1463 gtk_style_context_get_padding (context, state, &padding);
1464 gtk_style_context_get_border (context, state, &border);
1465 gtk_style_context_restore (context);
1467 junction_rect.x = padding.left + border.left;
1468 junction_rect.y = padding.top + border.top;
1472 junction_rect.x = 0;
1473 junction_rect.y = 0;
1476 junction_rect.width = vscr_allocation.width;
1477 junction_rect.height = hscr_allocation.height;
1480 (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
1481 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
1483 (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1484 priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
1485 junction_rect.x += hscr_allocation.width;
1487 if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1488 priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
1489 junction_rect.y += vscr_allocation.height;
1491 gtk_style_context_save (context);
1492 gtk_style_context_add_class (context, GTK_STYLE_CLASS_SCROLLBARS_JUNCTION);
1494 gtk_render_background (context, cr,
1495 junction_rect.x, junction_rect.y,
1496 junction_rect.width, junction_rect.height);
1497 gtk_render_frame (context, cr,
1498 junction_rect.x, junction_rect.y,
1499 junction_rect.width, junction_rect.height);
1501 gtk_style_context_restore (context);
1505 gtk_scrolled_window_draw (GtkWidget *widget,
1508 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
1509 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1510 GtkAllocation relative_allocation;
1511 GtkStyleContext *context;
1513 context = gtk_widget_get_style_context (widget);
1514 gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
1516 gtk_render_background (context, cr,
1518 gtk_widget_get_allocated_width (widget), gtk_widget_get_allocated_height (widget));
1520 if (priv->hscrollbar_visible &&
1521 priv->vscrollbar_visible)
1522 gtk_scrolled_window_draw_scrollbars_junction (scrolled_window, cr);
1524 if (priv->shadow_type != GTK_SHADOW_NONE)
1526 gboolean scrollbars_within_bevel;
1528 gtk_style_context_save (context);
1529 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1531 gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL);
1533 if (!scrollbars_within_bevel)
1535 GtkStateFlags state;
1536 GtkBorder padding, border;
1538 state = gtk_widget_get_state_flags (widget);
1539 gtk_style_context_get_padding (context, state, &padding);
1540 gtk_style_context_get_border (context, state, &border);
1542 relative_allocation.x -= padding.left + border.left;
1543 relative_allocation.y -= padding.top + border.top;
1544 relative_allocation.width += padding.left + padding.right + border.left + border.right;
1545 relative_allocation.height += padding.top + padding.bottom + border.top + border.bottom;
1549 relative_allocation.x = 0;
1550 relative_allocation.y = 0;
1551 relative_allocation.width = gtk_widget_get_allocated_width (widget);
1552 relative_allocation.height = gtk_widget_get_allocated_height (widget);
1555 gtk_render_frame (context, cr,
1556 relative_allocation.x,
1557 relative_allocation.y,
1558 relative_allocation.width,
1559 relative_allocation.height);
1561 gtk_style_context_restore (context);
1564 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->draw (widget, cr);
1570 gtk_scrolled_window_forall (GtkContainer *container,
1571 gboolean include_internals,
1572 GtkCallback callback,
1573 gpointer callback_data)
1575 GtkScrolledWindowPrivate *priv;
1576 GtkScrolledWindow *scrolled_window;
1578 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
1579 g_return_if_fail (callback != NULL);
1581 GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->forall (container,
1585 if (include_internals)
1587 scrolled_window = GTK_SCROLLED_WINDOW (container);
1588 priv = scrolled_window->priv;
1590 if (priv->vscrollbar)
1591 callback (priv->vscrollbar, callback_data);
1592 if (priv->hscrollbar)
1593 callback (priv->hscrollbar, callback_data);
1598 gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window,
1599 GtkScrollType scroll,
1600 gboolean horizontal)
1602 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1603 GtkAdjustment *adjustment = NULL;
1607 case GTK_SCROLL_STEP_UP:
1608 scroll = GTK_SCROLL_STEP_BACKWARD;
1611 case GTK_SCROLL_STEP_DOWN:
1612 scroll = GTK_SCROLL_STEP_FORWARD;
1615 case GTK_SCROLL_STEP_LEFT:
1616 scroll = GTK_SCROLL_STEP_BACKWARD;
1619 case GTK_SCROLL_STEP_RIGHT:
1620 scroll = GTK_SCROLL_STEP_FORWARD;
1623 case GTK_SCROLL_PAGE_UP:
1624 scroll = GTK_SCROLL_PAGE_BACKWARD;
1627 case GTK_SCROLL_PAGE_DOWN:
1628 scroll = GTK_SCROLL_PAGE_FORWARD;
1631 case GTK_SCROLL_PAGE_LEFT:
1632 scroll = GTK_SCROLL_STEP_BACKWARD;
1635 case GTK_SCROLL_PAGE_RIGHT:
1636 scroll = GTK_SCROLL_STEP_FORWARD;
1639 case GTK_SCROLL_STEP_BACKWARD:
1640 case GTK_SCROLL_STEP_FORWARD:
1641 case GTK_SCROLL_PAGE_BACKWARD:
1642 case GTK_SCROLL_PAGE_FORWARD:
1643 case GTK_SCROLL_START:
1644 case GTK_SCROLL_END:
1647 g_warning ("Invalid scroll type %u for GtkScrolledWindow::scroll-child", scroll);
1651 if ((horizontal && (!priv->hscrollbar || !priv->hscrollbar_visible)) ||
1652 (!horizontal && (!priv->vscrollbar || !priv->vscrollbar_visible)))
1657 if (priv->hscrollbar)
1658 adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
1662 if (priv->vscrollbar)
1663 adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
1668 gdouble value = gtk_adjustment_get_value (adjustment);
1672 case GTK_SCROLL_STEP_FORWARD:
1673 value += gtk_adjustment_get_step_increment (adjustment);
1675 case GTK_SCROLL_STEP_BACKWARD:
1676 value -= gtk_adjustment_get_step_increment (adjustment);
1678 case GTK_SCROLL_PAGE_FORWARD:
1679 value += gtk_adjustment_get_page_increment (adjustment);
1681 case GTK_SCROLL_PAGE_BACKWARD:
1682 value -= gtk_adjustment_get_page_increment (adjustment);
1684 case GTK_SCROLL_START:
1685 value = gtk_adjustment_get_lower (adjustment);
1687 case GTK_SCROLL_END:
1688 value = gtk_adjustment_get_upper (adjustment);
1691 g_assert_not_reached ();
1695 gtk_adjustment_set_value (adjustment, value);
1704 gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window,
1705 GtkDirectionType direction_type)
1707 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1708 GtkWidget *toplevel;
1710 /* Focus out of the scrolled window entirely. We do this by setting
1711 * a flag, then propagating the focus motion to the notebook.
1713 toplevel = gtk_widget_get_toplevel (GTK_WIDGET (scrolled_window));
1714 if (!gtk_widget_is_toplevel (toplevel))
1717 g_object_ref (scrolled_window);
1719 priv->focus_out = TRUE;
1720 g_signal_emit_by_name (toplevel, "move-focus", direction_type);
1721 priv->focus_out = FALSE;
1723 g_object_unref (scrolled_window);
1727 gtk_scrolled_window_relative_allocation (GtkWidget *widget,
1728 GtkAllocation *allocation)
1730 GtkAllocation widget_allocation;
1731 GtkScrolledWindow *scrolled_window;
1732 GtkScrolledWindowPrivate *priv;
1737 g_return_if_fail (widget != NULL);
1738 g_return_if_fail (allocation != NULL);
1740 scrolled_window = GTK_SCROLLED_WINDOW (widget);
1741 priv = scrolled_window->priv;
1743 /* Get possible scrollbar dimensions */
1744 sb_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
1745 gtk_widget_get_preferred_height (priv->hscrollbar, &sb_height, NULL);
1746 gtk_widget_get_preferred_width (priv->vscrollbar, &sb_width, NULL);
1748 gtk_widget_get_allocation (widget, &widget_allocation);
1752 allocation->width = widget_allocation.width;
1753 allocation->height = widget_allocation.height;
1755 /* Subtract some things from our available allocation size */
1756 if (priv->shadow_type != GTK_SHADOW_NONE)
1758 GtkStyleContext *context;
1759 GtkStateFlags state;
1760 GtkBorder padding, border;
1762 context = gtk_widget_get_style_context (widget);
1763 state = gtk_widget_get_state_flags (widget);
1765 gtk_style_context_save (context);
1766 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1768 gtk_style_context_get_border (context, state, &border);
1769 gtk_style_context_get_padding (context, state, &padding);
1771 allocation->x += padding.left + border.left;
1772 allocation->y += padding.top + border.top;
1773 allocation->width = MAX (1, allocation->width - (padding.left + border.left + padding.right + border.right));
1774 allocation->height = MAX (1, allocation->height - (padding.top + border.top + padding.bottom + border.bottom));
1776 gtk_style_context_restore (context);
1779 if (priv->vscrollbar_visible)
1783 is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
1786 (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
1787 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
1789 (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1790 priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
1791 allocation->x += (sb_width + sb_spacing);
1793 allocation->width = MAX (1, allocation->width - (sb_width + sb_spacing));
1795 if (priv->hscrollbar_visible)
1798 if (priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT ||
1799 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)
1800 allocation->y += (sb_height + sb_spacing);
1802 allocation->height = MAX (1, allocation->height - (sb_height + sb_spacing));
1807 _gtk_scrolled_window_get_overshoot (GtkScrolledWindow *scrolled_window,
1811 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1812 GtkAdjustment *vadjustment, *hadjustment;
1813 gdouble lower, upper, x, y;
1815 /* Vertical overshoot */
1816 vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
1817 lower = gtk_adjustment_get_lower (vadjustment);
1818 upper = gtk_adjustment_get_upper (vadjustment) -
1819 gtk_adjustment_get_page_size (vadjustment);
1821 if (priv->unclamped_vadj_value < lower)
1822 y = priv->unclamped_vadj_value - lower;
1823 else if (priv->unclamped_vadj_value > upper)
1824 y = priv->unclamped_vadj_value - upper;
1828 /* Horizontal overshoot */
1829 hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
1830 lower = gtk_adjustment_get_lower (hadjustment);
1831 upper = gtk_adjustment_get_upper (hadjustment) -
1832 gtk_adjustment_get_page_size (hadjustment);
1834 if (priv->unclamped_hadj_value < lower)
1835 x = priv->unclamped_hadj_value - lower;
1836 else if (priv->unclamped_hadj_value > upper)
1837 x = priv->unclamped_hadj_value - upper;
1847 return (x != 0 || y != 0);
1851 _gtk_scrolled_window_allocate_overshoot_window (GtkScrolledWindow *scrolled_window)
1853 GtkAllocation window_allocation, relative_allocation, allocation;
1854 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1855 GtkWidget *widget = GTK_WIDGET (scrolled_window);
1856 gint overshoot_x, overshoot_y;
1858 if (!gtk_widget_get_realized (widget))
1861 gtk_widget_get_allocation (widget, &allocation);
1862 gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
1863 _gtk_scrolled_window_get_overshoot (scrolled_window,
1864 &overshoot_x, &overshoot_y);
1866 window_allocation = relative_allocation;
1867 window_allocation.x += allocation.x;
1868 window_allocation.y += allocation.y;
1870 /* Handle displacement to the left/top by moving the overshoot
1871 * window, overshooting to the bottom/right is handled in
1872 * gtk_scrolled_window_allocate_child()
1874 if (overshoot_x < 0)
1875 window_allocation.x += -overshoot_x;
1877 if (overshoot_y < 0)
1878 window_allocation.y += -overshoot_y;
1880 window_allocation.width -= ABS (overshoot_x);
1881 window_allocation.height -= ABS (overshoot_y);
1883 gdk_window_move_resize (priv->overshoot_window,
1884 window_allocation.x, window_allocation.y,
1885 window_allocation.width, window_allocation.height);
1889 gtk_scrolled_window_allocate_child (GtkScrolledWindow *swindow,
1890 GtkAllocation *relative_allocation)
1892 GtkWidget *widget = GTK_WIDGET (swindow), *child;
1893 GtkAllocation allocation;
1894 GtkAllocation child_allocation;
1895 gint overshoot_x, overshoot_y;
1897 child = gtk_bin_get_child (GTK_BIN (widget));
1899 gtk_widget_get_allocation (widget, &allocation);
1901 gtk_scrolled_window_relative_allocation (widget, relative_allocation);
1902 _gtk_scrolled_window_get_overshoot (swindow, &overshoot_x, &overshoot_y);
1904 /* Handle overshooting to the right/bottom by relocating the
1905 * widget allocation to negative coordinates, so these edges
1906 * stick to the overshoot window border.
1908 if (overshoot_x > 0)
1909 child_allocation.x = -overshoot_x;
1911 child_allocation.x = 0;
1913 if (overshoot_y > 0)
1914 child_allocation.y = -overshoot_y;
1916 child_allocation.y = 0;
1918 child_allocation.width = relative_allocation->width;
1919 child_allocation.height = relative_allocation->height;
1921 gtk_widget_size_allocate (child, &child_allocation);
1925 gtk_scrolled_window_size_allocate (GtkWidget *widget,
1926 GtkAllocation *allocation)
1928 GtkScrolledWindow *scrolled_window;
1929 GtkScrolledWindowPrivate *priv;
1930 GtkStyleContext *context;
1931 GtkStateFlags state;
1932 GtkBorder padding, border;
1934 GtkAllocation relative_allocation;
1935 GtkAllocation child_allocation;
1937 gboolean scrollbars_within_bevel;
1942 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
1943 g_return_if_fail (allocation != NULL);
1945 scrolled_window = GTK_SCROLLED_WINDOW (widget);
1946 bin = GTK_BIN (scrolled_window);
1947 priv = scrolled_window->priv;
1949 /* Get possible scrollbar dimensions */
1950 sb_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
1951 gtk_widget_get_preferred_height (priv->hscrollbar, &sb_height, NULL);
1952 gtk_widget_get_preferred_width (priv->vscrollbar, &sb_width, NULL);
1954 context = gtk_widget_get_style_context (widget);
1955 state = gtk_widget_get_state_flags (widget);
1957 gtk_style_context_save (context);
1958 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1960 gtk_style_context_get_padding (context, state, &padding);
1961 gtk_style_context_get_border (context, state, &border);
1963 gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL);
1965 gtk_widget_set_allocation (widget, allocation);
1966 gtk_style_context_restore (context);
1968 if (priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
1969 priv->hscrollbar_visible = TRUE;
1970 else if (priv->hscrollbar_policy == GTK_POLICY_NEVER)
1971 priv->hscrollbar_visible = FALSE;
1972 if (priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
1973 priv->vscrollbar_visible = TRUE;
1974 else if (priv->vscrollbar_policy == GTK_POLICY_NEVER)
1975 priv->vscrollbar_visible = FALSE;
1977 child = gtk_bin_get_child (bin);
1978 if (child && gtk_widget_get_visible (child))
1980 gint child_scroll_width;
1981 gint child_scroll_height;
1982 gboolean previous_hvis;
1983 gboolean previous_vvis;
1986 /* Determine scrollbar visibility first via hfw apis */
1987 if (gtk_widget_get_request_mode (child) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
1989 if (gtk_scrollable_get_hscroll_policy (GTK_SCROLLABLE (child)) == GTK_SCROLL_MINIMUM)
1990 gtk_widget_get_preferred_width (child, &child_scroll_width, NULL);
1992 gtk_widget_get_preferred_width (child, NULL, &child_scroll_width);
1994 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
1996 /* First try without a vertical scrollbar if the content will fit the height
1997 * given the extra width of the scrollbar */
1998 if (gtk_scrollable_get_vscroll_policy (GTK_SCROLLABLE (child)) == GTK_SCROLL_MINIMUM)
1999 gtk_widget_get_preferred_height_for_width (child,
2000 MAX (allocation->width, child_scroll_width),
2001 &child_scroll_height, NULL);
2003 gtk_widget_get_preferred_height_for_width (child,
2004 MAX (allocation->width, child_scroll_width),
2005 NULL, &child_scroll_height);
2007 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
2009 /* Does the content height fit the allocation height ? */
2010 priv->vscrollbar_visible = child_scroll_height > allocation->height;
2012 /* Does the content width fit the allocation with minus a possible scrollbar ? */
2013 priv->hscrollbar_visible =
2014 child_scroll_width > allocation->width -
2015 (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
2017 /* Now that we've guessed the hscrollbar, does the content height fit
2018 * the possible new allocation height ? */
2019 priv->vscrollbar_visible =
2020 child_scroll_height > allocation->height -
2021 (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
2023 /* Now that we've guessed the vscrollbar, does the content width fit
2024 * the possible new allocation width ? */
2025 priv->hscrollbar_visible =
2026 child_scroll_width > allocation->width -
2027 (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
2029 else /* priv->hscrollbar_policy != GTK_POLICY_AUTOMATIC */
2031 priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
2032 priv->vscrollbar_visible = child_scroll_height > allocation->height -
2033 (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
2036 else /* priv->vscrollbar_policy != GTK_POLICY_AUTOMATIC */
2038 priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
2040 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
2041 priv->hscrollbar_visible =
2042 child_scroll_width > allocation->width -
2043 (priv->vscrollbar_visible ? 0 : sb_width + sb_spacing);
2045 priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
2048 else /* GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT */
2050 if (gtk_scrollable_get_vscroll_policy (GTK_SCROLLABLE (child)) == GTK_SCROLL_MINIMUM)
2051 gtk_widget_get_preferred_height (child, &child_scroll_height, NULL);
2053 gtk_widget_get_preferred_height (child, NULL, &child_scroll_height);
2055 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
2057 /* First try without a horizontal scrollbar if the content will fit the width
2058 * given the extra height of the scrollbar */
2059 if (gtk_scrollable_get_hscroll_policy (GTK_SCROLLABLE (child)) == GTK_SCROLL_MINIMUM)
2060 gtk_widget_get_preferred_width_for_height (child,
2061 MAX (allocation->height, child_scroll_height),
2062 &child_scroll_width, NULL);
2064 gtk_widget_get_preferred_width_for_height (child,
2065 MAX (allocation->height, child_scroll_height),
2066 NULL, &child_scroll_width);
2068 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
2070 /* Does the content width fit the allocation width ? */
2071 priv->hscrollbar_visible = child_scroll_width > allocation->width;
2073 /* Does the content height fit the allocation with minus a possible scrollbar ? */
2074 priv->vscrollbar_visible =
2075 child_scroll_height > allocation->height -
2076 (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
2078 /* Now that we've guessed the vscrollbar, does the content width fit
2079 * the possible new allocation width ? */
2080 priv->hscrollbar_visible =
2081 child_scroll_width > allocation->width -
2082 (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
2084 /* Now that we've guessed the hscrollbar, does the content height fit
2085 * the possible new allocation height ? */
2086 priv->vscrollbar_visible =
2087 child_scroll_height > allocation->height -
2088 (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
2090 else /* priv->vscrollbar_policy != GTK_POLICY_AUTOMATIC */
2092 priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
2093 priv->hscrollbar_visible = child_scroll_width > allocation->width -
2094 (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
2097 else /* priv->hscrollbar_policy != GTK_POLICY_AUTOMATIC */
2099 priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
2101 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
2102 priv->vscrollbar_visible =
2103 child_scroll_height > allocation->height -
2104 (priv->hscrollbar_visible ? 0 : sb_height + sb_spacing);
2106 priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
2110 /* Now after guessing scrollbar visibility; fall back on the allocation loop which
2111 * observes the adjustments to detect scrollbar visibility and also avoids
2112 * infinite recursion
2116 previous_hvis = priv->hscrollbar_visible;
2117 previous_vvis = priv->vscrollbar_visible;
2118 gtk_scrolled_window_allocate_child (scrolled_window, &relative_allocation);
2120 /* Explicitly force scrollbar visibility checks.
2122 * Since we make a guess above, the child might not decide to update the adjustments
2123 * if they logically did not change since the last configuration
2125 if (priv->hscrollbar)
2126 gtk_scrolled_window_adjustment_changed
2127 (gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)), scrolled_window);
2129 if (priv->vscrollbar)
2130 gtk_scrolled_window_adjustment_changed
2131 (gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)), scrolled_window);
2133 /* If, after the first iteration, the hscrollbar and the
2134 * vscrollbar flip visiblity... or if one of the scrollbars flip
2135 * on each itteration indefinitly/infinitely, then we just need both
2139 previous_hvis != priv->hscrollbar_visible &&
2140 previous_vvis != priv->vscrollbar_visible) || count > 3)
2142 priv->hscrollbar_visible = TRUE;
2143 priv->vscrollbar_visible = TRUE;
2145 gtk_scrolled_window_allocate_child (scrolled_window, &relative_allocation);
2152 while (previous_hvis != priv->hscrollbar_visible ||
2153 previous_vvis != priv->vscrollbar_visible);
2157 priv->hscrollbar_visible = priv->hscrollbar_policy == GTK_POLICY_ALWAYS;
2158 priv->vscrollbar_visible = priv->vscrollbar_policy == GTK_POLICY_ALWAYS;
2159 gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
2162 gtk_widget_set_child_visible (priv->hscrollbar, priv->hscrollbar_visible);
2163 if (priv->hscrollbar_visible)
2165 child_allocation.x = relative_allocation.x;
2166 if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
2167 priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
2168 child_allocation.y = (relative_allocation.y +
2169 relative_allocation.height +
2172 child_allocation.y = relative_allocation.y - sb_spacing - sb_height;
2174 child_allocation.width = relative_allocation.width;
2175 child_allocation.height = sb_height;
2176 child_allocation.x += allocation->x;
2177 child_allocation.y += allocation->y;
2179 if (priv->shadow_type != GTK_SHADOW_NONE)
2181 if (!scrollbars_within_bevel)
2183 child_allocation.x -= padding.left + border.left;
2184 child_allocation.width += padding.left + padding.right + border.left + border.right;
2186 if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
2187 priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
2188 child_allocation.y += padding.bottom + border.bottom;
2190 child_allocation.y -= padding.top + border.top;
2194 gtk_widget_size_allocate (priv->hscrollbar, &child_allocation);
2197 gtk_widget_set_child_visible (priv->vscrollbar, priv->vscrollbar_visible);
2198 if (priv->vscrollbar_visible)
2200 if ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL &&
2201 (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
2202 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
2203 (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
2204 (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
2205 priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
2206 child_allocation.x = (relative_allocation.x +
2207 relative_allocation.width +
2210 child_allocation.x = relative_allocation.x - sb_spacing - sb_width;
2212 child_allocation.y = relative_allocation.y;
2213 child_allocation.width = sb_width;
2214 child_allocation.height = relative_allocation.height;
2215 child_allocation.x += allocation->x;
2216 child_allocation.y += allocation->y;
2218 if (priv->shadow_type != GTK_SHADOW_NONE)
2220 if (!scrollbars_within_bevel)
2222 child_allocation.y -= padding.top + border.top;
2223 child_allocation.height += padding.top + padding.bottom + border.top + border.bottom;
2225 if ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL &&
2226 (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
2227 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
2228 (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
2229 (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
2230 priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
2231 child_allocation.x += padding.right + border.right;
2233 child_allocation.x -= padding.left + border.left;
2237 gtk_widget_size_allocate (priv->vscrollbar, &child_allocation);
2240 _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
2244 gtk_scrolled_window_scroll_event (GtkWidget *widget,
2245 GdkEventScroll *event)
2247 GtkScrolledWindowPrivate *priv;
2248 GtkScrolledWindow *scrolled_window;
2249 gboolean handled = FALSE;
2254 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (widget), FALSE);
2255 g_return_val_if_fail (event != NULL, FALSE);
2257 scrolled_window = GTK_SCROLLED_WINDOW (widget);
2258 priv = scrolled_window->priv;
2260 if (gdk_event_get_scroll_deltas ((GdkEvent *) event, &delta_x, &delta_y))
2262 if (delta_x != 0.0 && priv->hscrollbar &&
2263 gtk_widget_get_visible (priv->hscrollbar))
2268 gdouble scroll_unit;
2270 adj = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
2271 page_size = gtk_adjustment_get_page_size (adj);
2272 scroll_unit = pow (page_size, 2.0 / 3.0);
2274 new_value = CLAMP (gtk_adjustment_get_value (adj) + delta_x * scroll_unit,
2275 gtk_adjustment_get_lower (adj),
2276 gtk_adjustment_get_upper (adj) -
2277 gtk_adjustment_get_page_size (adj));
2279 gtk_adjustment_set_value (adj, new_value);
2284 if (delta_y != 0.0 && priv->vscrollbar &&
2285 gtk_widget_get_visible (priv->vscrollbar))
2290 gdouble scroll_unit;
2292 adj = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
2293 page_size = gtk_adjustment_get_page_size (adj);
2294 scroll_unit = pow (page_size, 2.0 / 3.0);
2296 new_value = CLAMP (gtk_adjustment_get_value (adj) + delta_y * scroll_unit,
2297 gtk_adjustment_get_lower (adj),
2298 gtk_adjustment_get_upper (adj) -
2299 gtk_adjustment_get_page_size (adj));
2301 gtk_adjustment_set_value (adj, new_value);
2310 if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_DOWN)
2311 range = priv->vscrollbar;
2313 range = priv->hscrollbar;
2315 if (range && gtk_widget_get_visible (range))
2317 GtkAdjustment *adj = gtk_range_get_adjustment (GTK_RANGE (range));
2320 delta = _gtk_range_get_wheel_delta (GTK_RANGE (range), event);
2322 new_value = CLAMP (gtk_adjustment_get_value (adj) + delta,
2323 gtk_adjustment_get_lower (adj),
2324 gtk_adjustment_get_upper (adj) -
2325 gtk_adjustment_get_page_size (adj));
2327 gtk_adjustment_set_value (adj, new_value);
2337 _gtk_scrolled_window_set_adjustment_value (GtkScrolledWindow *scrolled_window,
2338 GtkAdjustment *adjustment,
2340 gboolean allow_overshooting,
2341 gboolean snap_to_border)
2343 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2344 gdouble lower, upper, *prev_value;
2346 lower = gtk_adjustment_get_lower (adjustment);
2347 upper = gtk_adjustment_get_upper (adjustment) -
2348 gtk_adjustment_get_page_size (adjustment);
2350 if (adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
2351 prev_value = &priv->unclamped_hadj_value;
2352 else if (adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
2353 prev_value = &priv->unclamped_vadj_value;
2359 if (*prev_value < 0 && value > 0)
2361 else if (*prev_value > upper && value < upper)
2365 if (allow_overshooting)
2367 lower -= MAX_OVERSHOOT_DISTANCE;
2368 upper += MAX_OVERSHOOT_DISTANCE;
2371 *prev_value = CLAMP (value, lower, upper);
2372 gtk_adjustment_set_value (adjustment, value);
2374 return (*prev_value != value);
2378 scrolled_window_deceleration_cb (gpointer user_data)
2380 KineticScrollData *data = user_data;
2381 GtkScrolledWindow *scrolled_window = data->scrolled_window;
2382 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2383 GtkAdjustment *hadjustment, *vadjustment;
2384 gint old_overshoot_x, old_overshoot_y, overshoot_x, overshoot_y;
2386 gint64 current_time;
2389 hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
2390 vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
2392 _gtk_scrolled_window_get_overshoot (scrolled_window,
2393 &old_overshoot_x, &old_overshoot_y);
2395 current_time = g_get_monotonic_time ();
2396 elapsed = (current_time - data->last_deceleration_time) / 1000;
2397 data->last_deceleration_time = current_time;
2399 if (hadjustment && priv->hscrollbar_visible)
2401 value = priv->unclamped_hadj_value + (data->x_velocity * elapsed);
2403 if (_gtk_scrolled_window_set_adjustment_value (scrolled_window,
2406 data->x_velocity = 0;
2409 data->x_velocity = 0;
2411 if (vadjustment && priv->vscrollbar_visible)
2413 value = priv->unclamped_vadj_value + (data->y_velocity * elapsed);
2415 if (_gtk_scrolled_window_set_adjustment_value (scrolled_window,
2418 data->y_velocity = 0;
2421 data->y_velocity = 0;
2423 _gtk_scrolled_window_get_overshoot (scrolled_window,
2424 &overshoot_x, &overshoot_y);
2426 if (overshoot_x == 0)
2428 if (old_overshoot_x != 0)
2430 /* Overshooting finished snapping back */
2431 data->x_velocity = 0;
2433 else if (data->x_velocity > 0)
2435 data->x_velocity -= FRICTION_DECELERATION * elapsed * data->vel_sine;
2436 data->x_velocity = MAX (0, data->x_velocity);
2438 else if (data->x_velocity < 0)
2440 data->x_velocity += FRICTION_DECELERATION * elapsed * data->vel_sine;
2441 data->x_velocity = MIN (0, data->x_velocity);
2444 else if (overshoot_x < 0)
2445 data->x_velocity += OVERSHOOT_INVERSE_ACCELERATION * elapsed;
2446 else if (overshoot_x > 0)
2447 data->x_velocity -= OVERSHOOT_INVERSE_ACCELERATION * elapsed;
2449 if (overshoot_y == 0)
2451 if (old_overshoot_y != 0)
2453 /* Overshooting finished snapping back */
2454 data->y_velocity = 0;
2456 else if (data->y_velocity > 0)
2458 data->y_velocity -= FRICTION_DECELERATION * elapsed * data->vel_cosine;
2459 data->y_velocity = MAX (0, data->y_velocity);
2461 else if (data->y_velocity < 0)
2463 data->y_velocity += FRICTION_DECELERATION * elapsed * data->vel_cosine;
2464 data->y_velocity = MIN (0, data->y_velocity);
2467 else if (overshoot_y < 0)
2468 data->y_velocity += OVERSHOOT_INVERSE_ACCELERATION * elapsed;
2469 else if (overshoot_y > 0)
2470 data->y_velocity -= OVERSHOOT_INVERSE_ACCELERATION * elapsed;
2472 if (old_overshoot_x != overshoot_x ||
2473 old_overshoot_y != overshoot_y)
2475 if (overshoot_x >= 0 || overshoot_y >= 0)
2477 /* We need to reallocate the widget to have it at
2478 * negative offset, so there's a "gravity" on the
2479 * bottom/right corner
2481 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
2483 else if (overshoot_x < 0 || overshoot_y < 0)
2484 _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
2487 if (overshoot_x != 0 || overshoot_y != 0 ||
2488 data->x_velocity != 0 || data->y_velocity != 0)
2492 priv->deceleration_id = 0;
2498 gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled_window)
2500 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2502 if (priv->deceleration_id)
2504 g_source_remove (priv->deceleration_id);
2505 priv->deceleration_id = 0;
2510 gtk_scrolled_window_start_deceleration (GtkScrolledWindow *scrolled_window)
2512 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2513 KineticScrollData *data;
2516 data = g_new0 (KineticScrollData, 1);
2517 data->scrolled_window = scrolled_window;
2518 data->last_deceleration_time = g_get_monotonic_time ();
2519 data->x_velocity = priv->x_velocity;
2520 data->y_velocity = priv->y_velocity;
2522 /* We use sine/cosine as a factor to deceleration x/y components
2523 * of the vector, so we care about the sign later.
2525 angle = atan2 (ABS (data->x_velocity), ABS (data->y_velocity));
2526 data->vel_cosine = cos (angle);
2527 data->vel_sine = sin (angle);
2529 scrolled_window->priv->deceleration_id =
2530 gdk_threads_add_timeout_full (G_PRIORITY_DEFAULT,
2532 scrolled_window_deceleration_cb,
2533 data, (GDestroyNotify) g_free);
2537 gtk_scrolled_window_release_captured_event (GtkScrolledWindow *scrolled_window)
2539 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2541 /* Cancel the scrolling and send the button press
2542 * event to the child widget
2544 if (!priv->button_press_event)
2547 if (priv->drag_device)
2549 gtk_device_grab_remove (GTK_WIDGET (scrolled_window), priv->drag_device);
2550 priv->drag_device = NULL;
2553 if (priv->capture_button_press)
2555 GtkWidget *event_widget;
2557 event_widget = gtk_get_event_widget (priv->button_press_event);
2559 if (!_gtk_propagate_captured_event (event_widget,
2560 priv->button_press_event,
2561 gtk_bin_get_child (GTK_BIN (scrolled_window))))
2562 gtk_propagate_event (event_widget, priv->button_press_event);
2564 gdk_event_free (priv->button_press_event);
2565 priv->button_press_event = NULL;
2568 if (_gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL))
2569 gtk_scrolled_window_start_deceleration (scrolled_window);
2575 gtk_scrolled_window_calculate_velocity (GtkScrolledWindow *scrolled_window,
2578 GtkScrolledWindowPrivate *priv;
2579 gdouble x_root, y_root;
2582 #define STILL_THRESHOLD 40
2584 if (!gdk_event_get_root_coords (event, &x_root, &y_root))
2587 priv = scrolled_window->priv;
2588 _time = gdk_event_get_time (event);
2590 if (priv->last_motion_event_x_root != x_root ||
2591 priv->last_motion_event_y_root != y_root ||
2592 ABS (_time - priv->last_motion_event_time) > STILL_THRESHOLD)
2594 priv->x_velocity = (priv->last_motion_event_x_root - x_root) /
2595 (gdouble) (_time - priv->last_motion_event_time);
2596 priv->y_velocity = (priv->last_motion_event_y_root - y_root) /
2597 (gdouble) (_time - priv->last_motion_event_time);
2600 priv->last_motion_event_x_root = x_root;
2601 priv->last_motion_event_y_root = y_root;
2602 priv->last_motion_event_time = _time;
2604 #undef STILL_THRESHOLD
2610 gtk_scrolled_window_captured_button_release (GtkWidget *widget,
2613 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2614 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2618 gdouble x_root, y_root;
2620 if (gdk_event_get_button (event, &button) && button != 1)
2623 child = gtk_bin_get_child (GTK_BIN (widget));
2627 gtk_device_grab_remove (widget, priv->drag_device);
2628 priv->drag_device = NULL;
2630 if (priv->release_timeout_id)
2632 g_source_remove (priv->release_timeout_id);
2633 priv->release_timeout_id = 0;
2636 overshoot = _gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL);
2639 gdk_device_ungrab (gdk_event_get_device (event), gdk_event_get_time (event));
2642 /* There hasn't been scrolling at all, so just let the
2643 * child widget handle the button press normally
2645 gtk_scrolled_window_release_captured_event (scrolled_window);
2650 priv->in_drag = FALSE;
2652 if (priv->button_press_event)
2654 gdk_event_free (priv->button_press_event);
2655 priv->button_press_event = NULL;
2658 gtk_scrolled_window_calculate_velocity (scrolled_window, event);
2660 /* Zero out vector components without a visible scrollbar */
2661 if (!priv->hscrollbar_visible)
2662 priv->x_velocity = 0;
2663 if (!priv->vscrollbar_visible)
2664 priv->y_velocity = 0;
2666 if (priv->x_velocity != 0 || priv->y_velocity != 0 || overshoot)
2668 gtk_scrolled_window_start_deceleration (scrolled_window);
2669 priv->x_velocity = priv->y_velocity = 0;
2670 priv->last_button_event_valid = FALSE;
2674 gdk_event_get_root_coords (event, &x_root, &y_root);
2675 priv->last_button_event_x_root = x_root;
2676 priv->last_button_event_y_root = y_root;
2677 priv->last_button_event_valid = TRUE;
2680 if (priv->capture_button_press)
2687 gtk_scrolled_window_captured_motion_notify (GtkWidget *widget,
2690 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2691 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2692 gint old_overshoot_x, old_overshoot_y;
2693 gint new_overshoot_x, new_overshoot_y;
2695 GtkAdjustment *hadjustment;
2696 GtkAdjustment *vadjustment;
2698 GdkModifierType state;
2699 gdouble x_root, y_root;
2701 gdk_event_get_state (event, &state);
2702 if (!(state & GDK_BUTTON1_MASK))
2705 child = gtk_bin_get_child (GTK_BIN (widget));
2709 /* Check if we've passed the drag threshold */
2710 gdk_event_get_root_coords (event, &x_root, &y_root);
2713 if (gtk_drag_check_threshold (widget,
2714 priv->last_button_event_x_root,
2715 priv->last_button_event_y_root,
2718 if (priv->release_timeout_id)
2720 g_source_remove (priv->release_timeout_id);
2721 priv->release_timeout_id = 0;
2724 priv->last_button_event_valid = FALSE;
2725 priv->in_drag = TRUE;
2731 gdk_device_grab (priv->drag_device,
2732 gtk_widget_get_window (widget),
2733 GDK_OWNERSHIP_WINDOW,
2735 GDK_BUTTON_RELEASE_MASK | GDK_BUTTON1_MOTION_MASK,
2737 gdk_event_get_time (event));
2739 priv->last_button_event_valid = FALSE;
2741 if (priv->button_press_event)
2743 gdk_event_free (priv->button_press_event);
2744 priv->button_press_event = NULL;
2747 _gtk_scrolled_window_get_overshoot (scrolled_window,
2748 &old_overshoot_x, &old_overshoot_y);
2750 hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
2751 if (hadjustment && priv->hscrollbar_visible)
2753 dx = (priv->last_motion_event_x_root - x_root) + priv->unclamped_hadj_value;
2754 _gtk_scrolled_window_set_adjustment_value (scrolled_window, hadjustment,
2758 vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
2759 if (vadjustment && priv->vscrollbar_visible)
2761 dy = (priv->last_motion_event_y_root - y_root) + priv->unclamped_vadj_value;
2762 _gtk_scrolled_window_set_adjustment_value (scrolled_window, vadjustment,
2766 _gtk_scrolled_window_get_overshoot (scrolled_window,
2767 &new_overshoot_x, &new_overshoot_y);
2769 if (old_overshoot_x != new_overshoot_x ||
2770 old_overshoot_y != new_overshoot_y)
2772 if (new_overshoot_x >= 0 || new_overshoot_y >= 0)
2774 /* We need to reallocate the widget to have it at
2775 * negative offset, so there's a "gravity" on the
2776 * bottom/right corner
2778 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
2780 else if (new_overshoot_x < 0 || new_overshoot_y < 0)
2781 _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
2784 gtk_scrolled_window_calculate_velocity (scrolled_window, event);
2790 gtk_scrolled_window_captured_button_press (GtkWidget *widget,
2793 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2794 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2796 GtkWidget *event_widget;
2797 GdkDevice *source_device;
2798 GdkInputSource source;
2799 gdouble x_root, y_root;
2802 /* If scrollbars are not visible, we don't do kinetic scrolling */
2803 if (!priv->vscrollbar_visible && !priv->hscrollbar_visible)
2806 source_device = gdk_event_get_source_device (event);
2807 source = gdk_device_get_source (source_device);
2809 if (source != GDK_SOURCE_TOUCHSCREEN)
2812 event_widget = gtk_get_event_widget (event);
2814 /* If there's another scrolled window between the widget
2815 * receiving the event and this capturing scrolled window,
2816 * let it handle the events.
2818 if (widget != gtk_widget_get_ancestor (event_widget, GTK_TYPE_SCROLLED_WINDOW))
2821 /* Check whether the button press is close to the previous one,
2822 * take that as a shortcut to get the child widget handle events
2824 gdk_event_get_root_coords (event, &x_root, &y_root);
2825 if (priv->last_button_event_valid &&
2826 ABS (x_root - priv->last_button_event_x_root) < TOUCH_BYPASS_CAPTURED_THRESHOLD &&
2827 ABS (y_root - priv->last_button_event_y_root) < TOUCH_BYPASS_CAPTURED_THRESHOLD)
2829 priv->last_button_event_valid = FALSE;
2833 priv->last_button_event_x_root = priv->last_motion_event_x_root = x_root;
2834 priv->last_button_event_y_root = priv->last_motion_event_y_root = y_root;
2835 priv->last_motion_event_time = gdk_event_get_time (event);
2836 priv->last_button_event_valid = TRUE;
2838 if (gdk_event_get_button (event, &button) && button != 1)
2841 child = gtk_bin_get_child (GTK_BIN (widget));
2845 if (priv->hscrollbar == event_widget || priv->vscrollbar == event_widget)
2848 priv->drag_device = gdk_event_get_device (event);
2849 gtk_device_grab_add (widget, priv->drag_device, TRUE);
2851 gtk_scrolled_window_cancel_deceleration (scrolled_window);
2853 /* Only set the timeout if we're going to store an event */
2854 if (priv->capture_button_press)
2855 priv->release_timeout_id =
2856 gdk_threads_add_timeout (RELEASE_EVENT_TIMEOUT,
2857 (GSourceFunc) gtk_scrolled_window_release_captured_event,
2860 priv->in_drag = FALSE;
2862 if (priv->capture_button_press)
2864 /* Store the button press event in
2865 * case we need to propagate it later
2867 priv->button_press_event = gdk_event_copy (event);
2875 gtk_scrolled_window_captured_event (GtkWidget *widget,
2878 gboolean retval = FALSE;
2879 GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW (widget)->priv;
2881 if (gdk_window_get_window_type (event->any.window) == GDK_WINDOW_TEMP)
2884 switch (event->type)
2886 case GDK_TOUCH_BEGIN:
2887 case GDK_BUTTON_PRESS:
2888 retval = gtk_scrolled_window_captured_button_press (widget, event);
2891 case GDK_BUTTON_RELEASE:
2892 if (priv->drag_device)
2893 retval = gtk_scrolled_window_captured_button_release (widget, event);
2895 priv->last_button_event_valid = FALSE;
2897 case GDK_TOUCH_UPDATE:
2898 case GDK_MOTION_NOTIFY:
2899 if (priv->drag_device)
2900 retval = gtk_scrolled_window_captured_motion_notify (widget, event);
2902 case GDK_LEAVE_NOTIFY:
2903 case GDK_ENTER_NOTIFY:
2904 if (priv->in_drag &&
2905 event->crossing.mode != GDK_CROSSING_GRAB)
2916 gtk_scrolled_window_focus (GtkWidget *widget,
2917 GtkDirectionType direction)
2919 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2920 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2922 gboolean had_focus_child;
2924 had_focus_child = gtk_container_get_focus_child (GTK_CONTAINER (widget)) != NULL;
2926 if (priv->focus_out)
2928 priv->focus_out = FALSE; /* Clear this to catch the wrap-around case */
2932 if (gtk_widget_is_focus (widget))
2935 /* We only put the scrolled window itself in the focus chain if it
2936 * isn't possible to focus any children.
2938 child = gtk_bin_get_child (GTK_BIN (widget));
2941 if (gtk_widget_child_focus (child, direction))
2945 if (!had_focus_child && gtk_widget_get_can_focus (widget))
2947 gtk_widget_grab_focus (widget);
2955 gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
2958 GtkScrolledWindowPrivate *priv;
2959 GtkScrolledWindow *scrolled_window;
2961 g_return_if_fail (adjustment != NULL);
2962 g_return_if_fail (data != NULL);
2964 scrolled_window = GTK_SCROLLED_WINDOW (data);
2965 priv = scrolled_window->priv;
2967 if (priv->hscrollbar &&
2968 adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
2970 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
2974 visible = priv->hscrollbar_visible;
2975 priv->hscrollbar_visible = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment) >
2976 gtk_adjustment_get_page_size (adjustment));
2978 if (priv->hscrollbar_visible != visible)
2979 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
2982 else if (priv->vscrollbar &&
2983 adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
2985 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
2989 visible = priv->vscrollbar_visible;
2990 priv->vscrollbar_visible = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment) >
2991 gtk_adjustment_get_page_size (adjustment));
2993 if (priv->vscrollbar_visible != visible)
2994 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
3000 gtk_scrolled_window_adjustment_value_changed (GtkAdjustment *adjustment,
3003 GtkScrolledWindow *scrolled_window = user_data;
3004 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
3006 /* Allow overshooting for kinetic scrolling operations */
3007 if (priv->drag_device || priv->deceleration_id)
3010 /* Ensure GtkAdjustment and unclamped values are in sync */
3011 if (priv->vscrollbar &&
3012 adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
3013 priv->unclamped_vadj_value = gtk_adjustment_get_value (adjustment);
3014 else if (priv->hscrollbar &&
3015 adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
3016 priv->unclamped_hadj_value = gtk_adjustment_get_value (adjustment);
3020 gtk_scrolled_window_add (GtkContainer *container,
3023 GtkScrolledWindowPrivate *priv;
3024 GtkScrolledWindow *scrolled_window;
3026 GtkWidget *child_widget;
3027 GtkAdjustment *hadj, *vadj;
3029 bin = GTK_BIN (container);
3030 child_widget = gtk_bin_get_child (bin);
3031 g_return_if_fail (child_widget == NULL);
3033 scrolled_window = GTK_SCROLLED_WINDOW (container);
3034 priv = scrolled_window->priv;
3036 if (gtk_widget_get_realized (GTK_WIDGET (bin)))
3037 gtk_widget_set_parent_window (child, priv->overshoot_window);
3039 _gtk_bin_set_child (bin, child);
3040 gtk_widget_set_parent (child, GTK_WIDGET (bin));
3042 hadj = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
3043 vadj = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
3045 if (GTK_IS_SCROLLABLE (child))
3046 g_object_set (child, "hadjustment", hadj, "vadjustment", vadj, NULL);
3048 g_warning ("gtk_scrolled_window_add(): cannot add non scrollable widget "
3049 "use gtk_scrolled_window_add_with_viewport() instead");
3053 gtk_scrolled_window_remove (GtkContainer *container,
3056 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
3057 g_return_if_fail (child != NULL);
3058 g_return_if_fail (gtk_bin_get_child (GTK_BIN (container)) == child);
3060 g_object_set (child, "hadjustment", NULL, "vadjustment", NULL, NULL);
3062 /* chain parent class handler to remove child */
3063 GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->remove (container, child);
3067 * gtk_scrolled_window_add_with_viewport:
3068 * @scrolled_window: a #GtkScrolledWindow
3069 * @child: the widget you want to scroll
3071 * Used to add children without native scrolling capabilities. This
3072 * is simply a convenience function; it is equivalent to adding the
3073 * unscrollable child to a viewport, then adding the viewport to the
3074 * scrolled window. If a child has native scrolling, use
3075 * gtk_container_add() instead of this function.
3077 * The viewport scrolls the child by moving its #GdkWindow, and takes
3078 * the size of the child to be the size of its toplevel #GdkWindow.
3079 * This will be very wrong for most widgets that support native scrolling;
3080 * for example, if you add a widget such as #GtkTreeView with a viewport,
3081 * the whole widget will scroll, including the column headings. Thus,
3082 * widgets with native scrolling support should not be used with the
3083 * #GtkViewport proxy.
3085 * A widget supports scrolling natively if it implements the
3086 * #GtkScrollable interface.
3089 gtk_scrolled_window_add_with_viewport (GtkScrolledWindow *scrolled_window,
3093 GtkWidget *viewport;
3094 GtkWidget *child_widget;
3096 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
3097 g_return_if_fail (GTK_IS_WIDGET (child));
3098 g_return_if_fail (gtk_widget_get_parent (child) == NULL);
3100 bin = GTK_BIN (scrolled_window);
3101 child_widget = gtk_bin_get_child (bin);
3105 g_return_if_fail (GTK_IS_VIEWPORT (child_widget));
3106 g_return_if_fail (gtk_bin_get_child (GTK_BIN (child_widget)) == NULL);
3108 viewport = child_widget;
3113 gtk_viewport_new (gtk_scrolled_window_get_hadjustment (scrolled_window),
3114 gtk_scrolled_window_get_vadjustment (scrolled_window));
3115 gtk_container_add (GTK_CONTAINER (scrolled_window), viewport);
3118 gtk_widget_show (viewport);
3119 gtk_container_add (GTK_CONTAINER (viewport), child);
3123 * _gtk_scrolled_window_get_spacing:
3124 * @scrolled_window: a scrolled window
3126 * Gets the spacing between the scrolled window's scrollbars and
3127 * the scrolled widget. Used by GtkCombo
3129 * Return value: the spacing, in pixels.
3132 _gtk_scrolled_window_get_scrollbar_spacing (GtkScrolledWindow *scrolled_window)
3134 GtkScrolledWindowClass *class;
3136 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
3138 class = GTK_SCROLLED_WINDOW_GET_CLASS (scrolled_window);
3140 if (class->scrollbar_spacing >= 0)
3141 return class->scrollbar_spacing;
3144 gint scrollbar_spacing;
3146 gtk_widget_style_get (GTK_WIDGET (scrolled_window),
3147 "scrollbar-spacing", &scrollbar_spacing,
3150 return scrollbar_spacing;
3156 gtk_scrolled_window_get_preferred_size (GtkWidget *widget,
3157 GtkOrientation orientation,
3161 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3162 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
3163 GtkBin *bin = GTK_BIN (scrolled_window);
3166 gint scrollbar_spacing;
3167 GtkRequisition hscrollbar_requisition;
3168 GtkRequisition vscrollbar_requisition;
3169 GtkRequisition minimum_req, natural_req;
3171 gint min_child_size, nat_child_size;
3173 scrollbar_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
3177 minimum_req.width = 0;
3178 minimum_req.height = 0;
3179 natural_req.width = 0;
3180 natural_req.height = 0;
3182 gtk_widget_get_preferred_size (priv->hscrollbar,
3183 &hscrollbar_requisition, NULL);
3184 gtk_widget_get_preferred_size (priv->vscrollbar,
3185 &vscrollbar_requisition, NULL);
3187 child = gtk_bin_get_child (bin);
3188 if (child && gtk_widget_get_visible (child))
3190 if (orientation == GTK_ORIENTATION_HORIZONTAL)
3192 gtk_widget_get_preferred_width (child,
3196 if (priv->hscrollbar_policy == GTK_POLICY_NEVER)
3198 minimum_req.width += min_child_size;
3199 natural_req.width += nat_child_size;
3203 gint min_content_width = priv->min_content_width;
3205 if (min_content_width >= 0)
3207 minimum_req.width = MAX (minimum_req.width, min_content_width);
3208 natural_req.width = MAX (natural_req.width, min_content_width);
3213 minimum_req.width += vscrollbar_requisition.width;
3214 natural_req.width += vscrollbar_requisition.width;
3218 else /* GTK_ORIENTATION_VERTICAL */
3220 gtk_widget_get_preferred_height (child,
3224 if (priv->vscrollbar_policy == GTK_POLICY_NEVER)
3226 minimum_req.height += min_child_size;
3227 natural_req.height += nat_child_size;
3231 gint min_content_height = priv->min_content_height;
3233 if (min_content_height >= 0)
3235 minimum_req.height = MAX (minimum_req.height, min_content_height);
3236 natural_req.height = MAX (natural_req.height, min_content_height);
3241 minimum_req.height += vscrollbar_requisition.height;
3242 natural_req.height += vscrollbar_requisition.height;
3248 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC ||
3249 priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
3251 minimum_req.width = MAX (minimum_req.width, hscrollbar_requisition.width);
3252 natural_req.width = MAX (natural_req.width, hscrollbar_requisition.width);
3253 if (!extra_height || priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
3254 extra_height = scrollbar_spacing + hscrollbar_requisition.height;
3257 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC ||
3258 priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
3260 minimum_req.height = MAX (minimum_req.height, vscrollbar_requisition.height);
3261 natural_req.height = MAX (natural_req.height, vscrollbar_requisition.height);
3262 if (!extra_width || priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
3263 extra_width = scrollbar_spacing + vscrollbar_requisition.width;
3266 minimum_req.width += MAX (0, extra_width);
3267 minimum_req.height += MAX (0, extra_height);
3268 natural_req.width += MAX (0, extra_width);
3269 natural_req.height += MAX (0, extra_height);
3271 if (priv->shadow_type != GTK_SHADOW_NONE)
3273 GtkStyleContext *context;
3274 GtkStateFlags state;
3275 GtkBorder padding, border;
3277 context = gtk_widget_get_style_context (GTK_WIDGET (widget));
3278 state = gtk_widget_get_state_flags (GTK_WIDGET (widget));
3280 gtk_style_context_save (context);
3281 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
3283 gtk_style_context_get_padding (context, state, &padding);
3284 gtk_style_context_get_border (context, state, &border);
3286 minimum_req.width += padding.left + padding.right + border.left + border.right;
3287 minimum_req.height += padding.top + padding.bottom + border.top + border.bottom;
3288 natural_req.width += padding.left + padding.right + border.left + border.right;
3289 natural_req.height += padding.top + padding.bottom + border.top + border.bottom;
3291 gtk_style_context_restore (context);
3294 if (orientation == GTK_ORIENTATION_HORIZONTAL)
3297 *minimum_size = minimum_req.width;
3299 *natural_size = natural_req.width;
3304 *minimum_size = minimum_req.height;
3306 *natural_size = natural_req.height;
3311 gtk_scrolled_window_get_preferred_width (GtkWidget *widget,
3315 gtk_scrolled_window_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
3319 gtk_scrolled_window_get_preferred_height (GtkWidget *widget,
3323 gtk_scrolled_window_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
3327 gtk_scrolled_window_get_preferred_height_for_width (GtkWidget *widget,
3329 gint *minimum_height,
3330 gint *natural_height)
3332 g_return_if_fail (GTK_IS_WIDGET (widget));
3334 GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, minimum_height, natural_height);
3338 gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *widget,
3340 gint *minimum_width,
3341 gint *natural_width)
3343 g_return_if_fail (GTK_IS_WIDGET (widget));
3345 GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
3349 gtk_scrolled_window_realize (GtkWidget *widget)
3351 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3352 GtkAllocation allocation, relative_allocation;
3353 GdkWindowAttr attributes;
3354 GtkWidget *child_widget;
3355 gint attributes_mask;
3357 gtk_widget_set_realized (widget, TRUE);
3358 gtk_widget_get_allocation (widget, &allocation);
3359 gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
3361 attributes.window_type = GDK_WINDOW_CHILD;
3362 attributes.x = allocation.x + relative_allocation.x;
3363 attributes.y = allocation.y + relative_allocation.y;
3364 attributes.width = allocation.width;
3365 attributes.height = allocation.height;
3366 attributes.wclass = GDK_INPUT_OUTPUT;
3367 attributes.visual = gtk_widget_get_visual (widget);
3368 attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK |
3369 GDK_BUTTON_MOTION_MASK | GDK_TOUCH_MASK | GDK_EXPOSURE_MASK;
3371 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
3373 scrolled_window->priv->overshoot_window =
3374 gdk_window_new (gtk_widget_get_parent_window (widget),
3375 &attributes, attributes_mask);
3376 gdk_window_set_user_data (scrolled_window->priv->overshoot_window, widget);
3378 child_widget = gtk_bin_get_child (GTK_BIN (widget));
3381 gtk_widget_set_parent_window (child_widget,
3382 scrolled_window->priv->overshoot_window);
3384 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->realize (widget);
3388 gtk_scrolled_window_unrealize (GtkWidget *widget)
3390 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3392 gdk_window_set_user_data (scrolled_window->priv->overshoot_window, NULL);
3393 gdk_window_destroy (scrolled_window->priv->overshoot_window);
3394 scrolled_window->priv->overshoot_window = NULL;
3396 gtk_widget_set_realized (widget, FALSE);
3398 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->unrealize (widget);
3402 gtk_scrolled_window_map (GtkWidget *widget)
3404 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3406 gdk_window_show (scrolled_window->priv->overshoot_window);
3408 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->map (widget);
3412 gtk_scrolled_window_unmap (GtkWidget *widget)
3414 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3416 gdk_window_hide (scrolled_window->priv->overshoot_window);
3418 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->unmap (widget);
3422 gtk_scrolled_window_grab_notify (GtkWidget *widget,
3423 gboolean was_grabbed)
3425 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3426 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
3428 if (priv->drag_device &&
3429 gtk_widget_device_is_shadowed (widget,
3432 gdk_device_ungrab (priv->drag_device,
3433 gtk_get_current_event_time ());
3434 priv->drag_device = NULL;
3435 priv->in_drag = FALSE;
3437 if (priv->release_timeout_id)
3439 g_source_remove (priv->release_timeout_id);
3440 priv->release_timeout_id = 0;
3443 if (_gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL))
3444 gtk_scrolled_window_start_deceleration (scrolled_window);
3446 gtk_scrolled_window_cancel_deceleration (scrolled_window);
3448 priv->last_button_event_valid = FALSE;
3453 * gtk_scrolled_window_get_min_content_width:
3454 * @scrolled_window: a #GtkScrolledWindow
3456 * Gets the minimum content width of @scrolled_window, or -1 if not set.
3458 * Returns: the minimum content width
3463 gtk_scrolled_window_get_min_content_width (GtkScrolledWindow *scrolled_window)
3465 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
3467 return scrolled_window->priv->min_content_width;
3471 * gtk_scrolled_window_set_min_content_width:
3472 * @scrolled_window: a #GtkScrolledWindow
3473 * @width: the minimal content width
3475 * Sets the minimum width that @scrolled_window should keep visible.
3476 * Note that this can and (usually will) be smaller than the minimum
3477 * size of the content.
3482 gtk_scrolled_window_set_min_content_width (GtkScrolledWindow *scrolled_window,
3485 GtkScrolledWindowPrivate *priv;
3487 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
3489 priv = scrolled_window->priv;
3491 if (priv->min_content_width != width)
3493 priv->min_content_width = width;
3495 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
3497 g_object_notify (G_OBJECT (scrolled_window), "min-content-width");
3502 * gtk_scrolled_window_get_min_content_height:
3503 * @scrolled_window: a #GtkScrolledWindow
3505 * Gets the minimal content height of @scrolled_window, or -1 if not set.
3507 * Returns: the minimal content height
3512 gtk_scrolled_window_get_min_content_height (GtkScrolledWindow *scrolled_window)
3514 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
3516 return scrolled_window->priv->min_content_height;
3520 * gtk_scrolled_window_set_min_content_height:
3521 * @scrolled_window: a #GtkScrolledWindow
3522 * @height: the minimal content height
3524 * Sets the minimum height that @scrolled_window should keep visible.
3525 * Note that this can and (usually will) be smaller than the minimum
3526 * size of the content.
3531 gtk_scrolled_window_set_min_content_height (GtkScrolledWindow *scrolled_window,
3534 GtkScrolledWindowPrivate *priv;
3536 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
3538 priv = scrolled_window->priv;
3540 if (priv->min_content_height != height)
3542 priv->min_content_height = height;
3544 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
3546 g_object_notify (G_OBJECT (scrolled_window), "min-content-height");