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. gtk_container_add() will do this for you for
71 * widgets that don't implement #GtkScrollable natively, 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 MAX_OVERSHOOT_DISTANCE 50
130 #define FRICTION_DECELERATION 0.003
131 #define OVERSHOOT_INVERSE_ACCELERATION 0.003
132 #define RELEASE_EVENT_TIMEOUT 1000
134 struct _GtkScrolledWindowPrivate
136 GtkWidget *hscrollbar;
137 GtkWidget *vscrollbar;
139 GtkCornerType real_window_placement;
142 guint window_placement_set : 1;
143 guint hscrollbar_policy : 2;
144 guint vscrollbar_policy : 2;
145 guint hscrollbar_visible : 1;
146 guint vscrollbar_visible : 1;
147 guint window_placement : 2;
148 guint focus_out : 1; /* Flag used by ::move-focus-out implementation */
150 gint min_content_width;
151 gint min_content_height;
153 /* Kinetic scrolling */
154 GdkEvent *button_press_event;
155 GdkWindow *overshoot_window;
156 GdkDevice *drag_device;
157 guint kinetic_scrolling : 1;
158 guint capture_button_press : 1;
160 guint last_button_event_valid : 1;
162 guint release_timeout_id;
163 guint deceleration_id;
165 gdouble last_button_event_x_root;
166 gdouble last_button_event_y_root;
168 gdouble last_motion_event_x_root;
169 gdouble last_motion_event_y_root;
170 guint32 last_motion_event_time;
175 gdouble unclamped_hadj_value;
176 gdouble unclamped_vadj_value;
181 GtkScrolledWindow *scrolled_window;
182 gint64 last_deceleration_time;
194 PROP_HSCROLLBAR_POLICY,
195 PROP_VSCROLLBAR_POLICY,
196 PROP_WINDOW_PLACEMENT,
197 PROP_WINDOW_PLACEMENT_SET,
199 PROP_MIN_CONTENT_WIDTH,
200 PROP_MIN_CONTENT_HEIGHT,
201 PROP_KINETIC_SCROLLING
212 static void gtk_scrolled_window_set_property (GObject *object,
216 static void gtk_scrolled_window_get_property (GObject *object,
221 static void gtk_scrolled_window_destroy (GtkWidget *widget);
222 static void gtk_scrolled_window_screen_changed (GtkWidget *widget,
223 GdkScreen *previous_screen);
224 static gboolean gtk_scrolled_window_draw (GtkWidget *widget,
226 static void gtk_scrolled_window_size_allocate (GtkWidget *widget,
227 GtkAllocation *allocation);
228 static gboolean gtk_scrolled_window_scroll_event (GtkWidget *widget,
229 GdkEventScroll *event);
230 static gboolean gtk_scrolled_window_captured_event (GtkWidget *widget,
232 static gboolean gtk_scrolled_window_focus (GtkWidget *widget,
233 GtkDirectionType direction);
234 static void gtk_scrolled_window_add (GtkContainer *container,
236 static void gtk_scrolled_window_remove (GtkContainer *container,
238 static void gtk_scrolled_window_forall (GtkContainer *container,
239 gboolean include_internals,
240 GtkCallback callback,
241 gpointer callback_data);
242 static gboolean gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window,
243 GtkScrollType scroll,
244 gboolean horizontal);
245 static void gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window,
246 GtkDirectionType direction_type);
248 static void gtk_scrolled_window_relative_allocation(GtkWidget *widget,
249 GtkAllocation *allocation);
250 static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
252 static void gtk_scrolled_window_adjustment_value_changed (GtkAdjustment *adjustment,
255 static void gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window);
257 static void gtk_scrolled_window_get_preferred_width (GtkWidget *widget,
260 static void gtk_scrolled_window_get_preferred_height (GtkWidget *widget,
263 static void gtk_scrolled_window_get_preferred_height_for_width (GtkWidget *layout,
265 gint *minimum_height,
266 gint *natural_height);
267 static void gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *layout,
269 gint *minimum_height,
270 gint *natural_height);
272 static void gtk_scrolled_window_realize (GtkWidget *widget);
273 static void gtk_scrolled_window_unrealize (GtkWidget *widget);
274 static void gtk_scrolled_window_map (GtkWidget *widget);
275 static void gtk_scrolled_window_unmap (GtkWidget *widget);
277 static void gtk_scrolled_window_grab_notify (GtkWidget *widget,
278 gboolean was_grabbed);
280 static gboolean _gtk_scrolled_window_set_adjustment_value (GtkScrolledWindow *scrolled_window,
281 GtkAdjustment *adjustment,
283 gboolean allow_overshooting,
284 gboolean snap_to_border);
286 static void gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled_window);
288 static guint signals[LAST_SIGNAL] = {0};
290 G_DEFINE_TYPE (GtkScrolledWindow, gtk_scrolled_window, GTK_TYPE_BIN)
294 add_scroll_binding (GtkBindingSet *binding_set,
296 GdkModifierType mask,
297 GtkScrollType scroll,
300 guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
302 gtk_binding_entry_add_signal (binding_set, keyval, mask,
304 GTK_TYPE_SCROLL_TYPE, scroll,
305 G_TYPE_BOOLEAN, horizontal);
306 gtk_binding_entry_add_signal (binding_set, keypad_keyval, mask,
308 GTK_TYPE_SCROLL_TYPE, scroll,
309 G_TYPE_BOOLEAN, horizontal);
313 add_tab_bindings (GtkBindingSet *binding_set,
314 GdkModifierType modifiers,
315 GtkDirectionType direction)
317 gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, modifiers,
319 GTK_TYPE_DIRECTION_TYPE, direction);
320 gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, modifiers,
322 GTK_TYPE_DIRECTION_TYPE, direction);
326 gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
328 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
329 GtkWidgetClass *widget_class;
330 GtkContainerClass *container_class;
331 GtkBindingSet *binding_set;
333 widget_class = (GtkWidgetClass*) class;
334 container_class = (GtkContainerClass*) class;
336 gobject_class->set_property = gtk_scrolled_window_set_property;
337 gobject_class->get_property = gtk_scrolled_window_get_property;
339 widget_class->destroy = gtk_scrolled_window_destroy;
340 widget_class->screen_changed = gtk_scrolled_window_screen_changed;
341 widget_class->draw = gtk_scrolled_window_draw;
342 widget_class->size_allocate = gtk_scrolled_window_size_allocate;
343 widget_class->scroll_event = gtk_scrolled_window_scroll_event;
344 widget_class->focus = gtk_scrolled_window_focus;
345 widget_class->get_preferred_width = gtk_scrolled_window_get_preferred_width;
346 widget_class->get_preferred_height = gtk_scrolled_window_get_preferred_height;
347 widget_class->get_preferred_height_for_width = gtk_scrolled_window_get_preferred_height_for_width;
348 widget_class->get_preferred_width_for_height = gtk_scrolled_window_get_preferred_width_for_height;
349 widget_class->realize = gtk_scrolled_window_realize;
350 widget_class->unrealize = gtk_scrolled_window_unrealize;
351 widget_class->map = gtk_scrolled_window_map;
352 widget_class->unmap = gtk_scrolled_window_unmap;
353 widget_class->grab_notify = gtk_scrolled_window_grab_notify;
355 container_class->add = gtk_scrolled_window_add;
356 container_class->remove = gtk_scrolled_window_remove;
357 container_class->forall = gtk_scrolled_window_forall;
358 gtk_container_class_handle_border_width (container_class);
360 class->scrollbar_spacing = -1;
362 class->scroll_child = gtk_scrolled_window_scroll_child;
363 class->move_focus_out = gtk_scrolled_window_move_focus_out;
365 g_object_class_install_property (gobject_class,
367 g_param_spec_object ("hadjustment",
368 P_("Horizontal Adjustment"),
369 P_("The GtkAdjustment for the horizontal position"),
371 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
372 g_object_class_install_property (gobject_class,
374 g_param_spec_object ("vadjustment",
375 P_("Vertical Adjustment"),
376 P_("The GtkAdjustment for the vertical position"),
378 GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
379 g_object_class_install_property (gobject_class,
380 PROP_HSCROLLBAR_POLICY,
381 g_param_spec_enum ("hscrollbar-policy",
382 P_("Horizontal Scrollbar Policy"),
383 P_("When the horizontal scrollbar is displayed"),
384 GTK_TYPE_POLICY_TYPE,
385 GTK_POLICY_AUTOMATIC,
386 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
387 g_object_class_install_property (gobject_class,
388 PROP_VSCROLLBAR_POLICY,
389 g_param_spec_enum ("vscrollbar-policy",
390 P_("Vertical Scrollbar Policy"),
391 P_("When the vertical scrollbar is displayed"),
392 GTK_TYPE_POLICY_TYPE,
393 GTK_POLICY_AUTOMATIC,
394 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
396 g_object_class_install_property (gobject_class,
397 PROP_WINDOW_PLACEMENT,
398 g_param_spec_enum ("window-placement",
399 P_("Window Placement"),
400 P_("Where the contents are located with respect to the scrollbars. This property only takes effect if \"window-placement-set\" is TRUE."),
401 GTK_TYPE_CORNER_TYPE,
403 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
406 * GtkScrolledWindow:window-placement-set:
408 * Whether "window-placement" should be used to determine the location
409 * of the contents with respect to the scrollbars. Otherwise, the
410 * "gtk-scrolled-window-placement" setting is used.
414 g_object_class_install_property (gobject_class,
415 PROP_WINDOW_PLACEMENT_SET,
416 g_param_spec_boolean ("window-placement-set",
417 P_("Window Placement Set"),
418 P_("Whether \"window-placement\" should be used to determine the location of the contents with respect to the scrollbars."),
420 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
421 g_object_class_install_property (gobject_class,
423 g_param_spec_enum ("shadow-type",
425 P_("Style of bevel around the contents"),
426 GTK_TYPE_SHADOW_TYPE,
428 GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
431 * GtkScrolledWindow:scrollbars-within-bevel:
433 * Whether to place scrollbars within the scrolled window's bevel.
437 gtk_widget_class_install_style_property (widget_class,
438 g_param_spec_boolean ("scrollbars-within-bevel",
439 P_("Scrollbars within bevel"),
440 P_("Place scrollbars within the scrolled window's bevel"),
442 GTK_PARAM_READABLE));
444 gtk_widget_class_install_style_property (widget_class,
445 g_param_spec_int ("scrollbar-spacing",
446 P_("Scrollbar spacing"),
447 P_("Number of pixels between the scrollbars and the scrolled window"),
450 DEFAULT_SCROLLBAR_SPACING,
451 GTK_PARAM_READABLE));
454 * GtkScrolledWindow:min-content-width:
456 * The minimum content width of @scrolled_window, or -1 if not set.
460 g_object_class_install_property (gobject_class,
461 PROP_MIN_CONTENT_WIDTH,
462 g_param_spec_int ("min-content-width",
463 P_("Minimum Content Width"),
464 P_("The minimum width that the scrolled window will allocate to its content"),
466 GTK_PARAM_READWRITE));
469 * GtkScrolledWindow:min-content-height:
471 * The minimum content height of @scrolled_window, or -1 if not set.
475 g_object_class_install_property (gobject_class,
476 PROP_MIN_CONTENT_HEIGHT,
477 g_param_spec_int ("min-content-height",
478 P_("Minimum Content Height"),
479 P_("The minimum height that the scrolled window will allocate to its content"),
481 GTK_PARAM_READWRITE));
484 * GtkScrolledWindow:kinetic-scrolling:
486 * The kinetic scrolling behavior flags. Kinetic scrolling
487 * only applies to devices with source %GDK_SOURCE_TOUCHSCREEN
491 g_object_class_install_property (gobject_class,
492 PROP_KINETIC_SCROLLING,
493 g_param_spec_boolean ("kinetic-scrolling",
494 P_("Kinetic Scrolling"),
495 P_("Kinetic scrolling mode."),
498 GTK_PARAM_WRITABLE));
500 * GtkScrolledWindow::scroll-child:
501 * @scrolled_window: a #GtkScrolledWindow
502 * @scroll: a #GtkScrollType describing how much to scroll
503 * @horizontal: whether the keybinding scrolls the child
504 * horizontally or not
506 * The ::scroll-child signal is a
507 * <link linkend="keybinding-signals">keybinding signal</link>
508 * which gets emitted when a keybinding that scrolls is pressed.
509 * The horizontal or vertical adjustment is updated which triggers a
510 * signal that the scrolled windows child may listen to and scroll itself.
512 signals[SCROLL_CHILD] =
513 g_signal_new (I_("scroll-child"),
514 G_TYPE_FROM_CLASS (gobject_class),
515 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
516 G_STRUCT_OFFSET (GtkScrolledWindowClass, scroll_child),
518 _gtk_marshal_BOOLEAN__ENUM_BOOLEAN,
520 GTK_TYPE_SCROLL_TYPE,
524 * GtkScrolledWindow::move-focus-out:
525 * @scrolled_window: a #GtkScrolledWindow
526 * @direction_type: either %GTK_DIR_TAB_FORWARD or
527 * %GTK_DIR_TAB_BACKWARD
529 * The ::move-focus-out signal is a
530 * <link linkend="keybinding-signals">keybinding signal</link>
531 * which gets emitted when focus is moved away from the scrolled
532 * window by a keybinding.
533 * The #GtkWidget::move-focus signal is emitted with @direction_type
534 * on this scrolled windows toplevel parent in the container hierarchy.
535 * The default bindings for this signal are
536 * <keycombo><keycap>Tab</keycap><keycap>Ctrl</keycap></keycombo>
538 * <keycombo><keycap>Tab</keycap><keycap>Ctrl</keycap><keycap>Shift</keycap></keycombo>.
540 signals[MOVE_FOCUS_OUT] =
541 g_signal_new (I_("move-focus-out"),
542 G_TYPE_FROM_CLASS (gobject_class),
543 G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
544 G_STRUCT_OFFSET (GtkScrolledWindowClass, move_focus_out),
546 _gtk_marshal_VOID__ENUM,
548 GTK_TYPE_DIRECTION_TYPE);
550 binding_set = gtk_binding_set_by_class (class);
552 add_scroll_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, TRUE);
553 add_scroll_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD, TRUE);
554 add_scroll_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, FALSE);
555 add_scroll_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD, FALSE);
557 add_scroll_binding (binding_set, GDK_KEY_Page_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_BACKWARD, TRUE);
558 add_scroll_binding (binding_set, GDK_KEY_Page_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_FORWARD, TRUE);
559 add_scroll_binding (binding_set, GDK_KEY_Page_Up, 0, GTK_SCROLL_PAGE_BACKWARD, FALSE);
560 add_scroll_binding (binding_set, GDK_KEY_Page_Down, 0, GTK_SCROLL_PAGE_FORWARD, FALSE);
562 add_scroll_binding (binding_set, GDK_KEY_Home, GDK_CONTROL_MASK, GTK_SCROLL_START, TRUE);
563 add_scroll_binding (binding_set, GDK_KEY_End, GDK_CONTROL_MASK, GTK_SCROLL_END, TRUE);
564 add_scroll_binding (binding_set, GDK_KEY_Home, 0, GTK_SCROLL_START, FALSE);
565 add_scroll_binding (binding_set, GDK_KEY_End, 0, GTK_SCROLL_END, FALSE);
567 add_tab_bindings (binding_set, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD);
568 add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
570 g_type_class_add_private (class, sizeof (GtkScrolledWindowPrivate));
572 gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCROLLED_WINDOW_ACCESSIBLE);
576 gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
578 GtkScrolledWindowPrivate *priv;
580 scrolled_window->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (scrolled_window,
581 GTK_TYPE_SCROLLED_WINDOW,
582 GtkScrolledWindowPrivate);
584 gtk_widget_set_has_window (GTK_WIDGET (scrolled_window), FALSE);
585 gtk_widget_set_can_focus (GTK_WIDGET (scrolled_window), TRUE);
587 priv->hscrollbar = NULL;
588 priv->vscrollbar = NULL;
589 priv->hscrollbar_policy = GTK_POLICY_AUTOMATIC;
590 priv->vscrollbar_policy = GTK_POLICY_AUTOMATIC;
591 priv->hscrollbar_visible = FALSE;
592 priv->vscrollbar_visible = FALSE;
593 priv->focus_out = FALSE;
594 priv->window_placement = GTK_CORNER_TOP_LEFT;
595 gtk_scrolled_window_update_real_placement (scrolled_window);
596 priv->min_content_width = -1;
597 priv->min_content_height = -1;
599 gtk_scrolled_window_set_kinetic_scrolling (scrolled_window, TRUE);
600 gtk_scrolled_window_set_capture_button_press (scrolled_window, TRUE);
604 * gtk_scrolled_window_new:
605 * @hadjustment: (allow-none): horizontal adjustment
606 * @vadjustment: (allow-none): vertical adjustment
608 * Creates a new scrolled window.
610 * The two arguments are the scrolled window's adjustments; these will be
611 * shared with the scrollbars and the child widget to keep the bars in sync
612 * with the child. Usually you want to pass %NULL for the adjustments, which
613 * will cause the scrolled window to create them for you.
615 * Returns: a new scrolled window
618 gtk_scrolled_window_new (GtkAdjustment *hadjustment,
619 GtkAdjustment *vadjustment)
621 GtkWidget *scrolled_window;
624 g_return_val_if_fail (GTK_IS_ADJUSTMENT (hadjustment), NULL);
627 g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadjustment), NULL);
629 scrolled_window = g_object_new (GTK_TYPE_SCROLLED_WINDOW,
630 "hadjustment", hadjustment,
631 "vadjustment", vadjustment,
634 return scrolled_window;
638 * gtk_scrolled_window_set_hadjustment:
639 * @scrolled_window: a #GtkScrolledWindow
640 * @hadjustment: horizontal scroll adjustment
642 * Sets the #GtkAdjustment for the horizontal scrollbar.
645 gtk_scrolled_window_set_hadjustment (GtkScrolledWindow *scrolled_window,
646 GtkAdjustment *hadjustment)
648 GtkScrolledWindowPrivate *priv;
652 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
654 g_return_if_fail (GTK_IS_ADJUSTMENT (hadjustment));
656 hadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
658 bin = GTK_BIN (scrolled_window);
659 priv = scrolled_window->priv;
661 if (!priv->hscrollbar)
663 gtk_widget_push_composite_child ();
664 priv->hscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_HORIZONTAL, hadjustment);
665 gtk_widget_set_composite_name (priv->hscrollbar, "hscrollbar");
666 gtk_widget_pop_composite_child ();
668 gtk_widget_set_parent (priv->hscrollbar, GTK_WIDGET (scrolled_window));
669 g_object_ref (priv->hscrollbar);
670 gtk_widget_show (priv->hscrollbar);
674 GtkAdjustment *old_adjustment;
676 old_adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
677 if (old_adjustment == hadjustment)
680 g_signal_handlers_disconnect_by_func (old_adjustment,
681 gtk_scrolled_window_adjustment_changed,
683 gtk_range_set_adjustment (GTK_RANGE (priv->hscrollbar),
686 hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
687 g_signal_connect (hadjustment,
689 G_CALLBACK (gtk_scrolled_window_adjustment_changed),
691 g_signal_connect (hadjustment,
693 G_CALLBACK (gtk_scrolled_window_adjustment_value_changed),
695 gtk_scrolled_window_adjustment_changed (hadjustment, scrolled_window);
696 gtk_scrolled_window_adjustment_value_changed (hadjustment, scrolled_window);
698 child = gtk_bin_get_child (bin);
699 if (GTK_IS_SCROLLABLE (child))
700 gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (child), hadjustment);
702 g_object_notify (G_OBJECT (scrolled_window), "hadjustment");
706 * gtk_scrolled_window_set_vadjustment:
707 * @scrolled_window: a #GtkScrolledWindow
708 * @vadjustment: vertical scroll adjustment
710 * Sets the #GtkAdjustment for the vertical scrollbar.
713 gtk_scrolled_window_set_vadjustment (GtkScrolledWindow *scrolled_window,
714 GtkAdjustment *vadjustment)
716 GtkScrolledWindowPrivate *priv;
720 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
722 g_return_if_fail (GTK_IS_ADJUSTMENT (vadjustment));
724 vadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
726 bin = GTK_BIN (scrolled_window);
727 priv = scrolled_window->priv;
729 if (!priv->vscrollbar)
731 gtk_widget_push_composite_child ();
732 priv->vscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, vadjustment);
733 gtk_widget_set_composite_name (priv->vscrollbar, "vscrollbar");
734 gtk_widget_pop_composite_child ();
736 gtk_widget_set_parent (priv->vscrollbar, GTK_WIDGET (scrolled_window));
737 g_object_ref (priv->vscrollbar);
738 gtk_widget_show (priv->vscrollbar);
742 GtkAdjustment *old_adjustment;
744 old_adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
745 if (old_adjustment == vadjustment)
748 g_signal_handlers_disconnect_by_func (old_adjustment,
749 gtk_scrolled_window_adjustment_changed,
751 gtk_range_set_adjustment (GTK_RANGE (priv->vscrollbar),
754 vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
755 g_signal_connect (vadjustment,
757 G_CALLBACK (gtk_scrolled_window_adjustment_changed),
759 g_signal_connect (vadjustment,
761 G_CALLBACK (gtk_scrolled_window_adjustment_value_changed),
763 gtk_scrolled_window_adjustment_changed (vadjustment, scrolled_window);
764 gtk_scrolled_window_adjustment_value_changed (vadjustment, scrolled_window);
766 child = gtk_bin_get_child (bin);
767 if (GTK_IS_SCROLLABLE (child))
768 gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (child), vadjustment);
770 g_object_notify (G_OBJECT (scrolled_window), "vadjustment");
774 * gtk_scrolled_window_get_hadjustment:
775 * @scrolled_window: a #GtkScrolledWindow
777 * Returns the horizontal scrollbar's adjustment, used to connect the
778 * horizontal scrollbar to the child widget's horizontal scroll
781 * Returns: (transfer none): the horizontal #GtkAdjustment
784 gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window)
786 GtkScrolledWindowPrivate *priv;
788 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
790 priv = scrolled_window->priv;
792 return (priv->hscrollbar ?
793 gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)) :
798 * gtk_scrolled_window_get_vadjustment:
799 * @scrolled_window: a #GtkScrolledWindow
801 * Returns the vertical scrollbar's adjustment, used to connect the
802 * vertical scrollbar to the child widget's vertical scroll functionality.
804 * Returns: (transfer none): the vertical #GtkAdjustment
807 gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window)
809 GtkScrolledWindowPrivate *priv;
811 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
813 priv = scrolled_window->priv;
815 return (priv->vscrollbar ?
816 gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)) :
821 * gtk_scrolled_window_get_hscrollbar:
822 * @scrolled_window: a #GtkScrolledWindow
824 * Returns the horizontal scrollbar of @scrolled_window.
826 * Returns: (transfer none): the horizontal scrollbar of the scrolled window,
827 * or %NULL if it does not have one.
832 gtk_scrolled_window_get_hscrollbar (GtkScrolledWindow *scrolled_window)
834 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
836 return scrolled_window->priv->hscrollbar;
840 * gtk_scrolled_window_get_vscrollbar:
841 * @scrolled_window: a #GtkScrolledWindow
843 * Returns the vertical scrollbar of @scrolled_window.
845 * Returns: (transfer none): the vertical scrollbar of the scrolled window,
846 * or %NULL if it does not have one.
851 gtk_scrolled_window_get_vscrollbar (GtkScrolledWindow *scrolled_window)
853 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
855 return scrolled_window->priv->vscrollbar;
859 * gtk_scrolled_window_set_policy:
860 * @scrolled_window: a #GtkScrolledWindow
861 * @hscrollbar_policy: policy for horizontal bar
862 * @vscrollbar_policy: policy for vertical bar
864 * Sets the scrollbar policy for the horizontal and vertical scrollbars.
866 * The policy determines when the scrollbar should appear; it is a value
867 * from the #GtkPolicyType enumeration. If %GTK_POLICY_ALWAYS, the
868 * scrollbar is always present; if %GTK_POLICY_NEVER, the scrollbar is
869 * never present; if %GTK_POLICY_AUTOMATIC, the scrollbar is present only
870 * if needed (that is, if the slider part of the bar would be smaller
871 * than the trough - the display is larger than the page size).
874 gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window,
875 GtkPolicyType hscrollbar_policy,
876 GtkPolicyType vscrollbar_policy)
878 GtkScrolledWindowPrivate *priv;
879 GObject *object = G_OBJECT (scrolled_window);
881 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
883 priv = scrolled_window->priv;
885 if ((priv->hscrollbar_policy != hscrollbar_policy) ||
886 (priv->vscrollbar_policy != vscrollbar_policy))
888 priv->hscrollbar_policy = hscrollbar_policy;
889 priv->vscrollbar_policy = vscrollbar_policy;
891 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
893 g_object_freeze_notify (object);
894 g_object_notify (object, "hscrollbar-policy");
895 g_object_notify (object, "vscrollbar-policy");
896 g_object_thaw_notify (object);
901 * gtk_scrolled_window_get_policy:
902 * @scrolled_window: a #GtkScrolledWindow
903 * @hscrollbar_policy: (out) (allow-none): location to store the policy
904 * for the horizontal scrollbar, or %NULL.
905 * @vscrollbar_policy: (out) (allow-none): location to store the policy
906 * for the vertical scrollbar, or %NULL.
908 * Retrieves the current policy values for the horizontal and vertical
909 * scrollbars. See gtk_scrolled_window_set_policy().
912 gtk_scrolled_window_get_policy (GtkScrolledWindow *scrolled_window,
913 GtkPolicyType *hscrollbar_policy,
914 GtkPolicyType *vscrollbar_policy)
916 GtkScrolledWindowPrivate *priv;
918 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
920 priv = scrolled_window->priv;
922 if (hscrollbar_policy)
923 *hscrollbar_policy = priv->hscrollbar_policy;
924 if (vscrollbar_policy)
925 *vscrollbar_policy = priv->vscrollbar_policy;
929 gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window)
931 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
932 GtkSettings *settings;
934 settings = gtk_widget_get_settings (GTK_WIDGET (scrolled_window));
936 if (priv->window_placement_set || settings == NULL)
937 priv->real_window_placement = priv->window_placement;
939 g_object_get (settings,
940 "gtk-scrolled-window-placement",
941 &priv->real_window_placement,
946 gtk_scrolled_window_set_placement_internal (GtkScrolledWindow *scrolled_window,
947 GtkCornerType window_placement)
949 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
951 if (priv->window_placement != window_placement)
953 priv->window_placement = window_placement;
955 gtk_scrolled_window_update_real_placement (scrolled_window);
956 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
958 g_object_notify (G_OBJECT (scrolled_window), "window-placement");
963 gtk_scrolled_window_set_placement_set (GtkScrolledWindow *scrolled_window,
964 gboolean placement_set,
965 gboolean emit_resize)
967 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
969 if (priv->window_placement_set != placement_set)
971 priv->window_placement_set = placement_set;
973 gtk_scrolled_window_update_real_placement (scrolled_window);
975 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
977 g_object_notify (G_OBJECT (scrolled_window), "window-placement-set");
982 * gtk_scrolled_window_set_placement:
983 * @scrolled_window: a #GtkScrolledWindow
984 * @window_placement: position of the child window
986 * Sets the placement of the contents with respect to the scrollbars
987 * for the scrolled window.
989 * The default is %GTK_CORNER_TOP_LEFT, meaning the child is
990 * in the top left, with the scrollbars underneath and to the right.
991 * Other values in #GtkCornerType are %GTK_CORNER_TOP_RIGHT,
992 * %GTK_CORNER_BOTTOM_LEFT, and %GTK_CORNER_BOTTOM_RIGHT.
994 * See also gtk_scrolled_window_get_placement() and
995 * gtk_scrolled_window_unset_placement().
998 gtk_scrolled_window_set_placement (GtkScrolledWindow *scrolled_window,
999 GtkCornerType window_placement)
1001 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1003 gtk_scrolled_window_set_placement_set (scrolled_window, TRUE, FALSE);
1004 gtk_scrolled_window_set_placement_internal (scrolled_window, window_placement);
1008 * gtk_scrolled_window_get_placement:
1009 * @scrolled_window: a #GtkScrolledWindow
1011 * Gets the placement of the contents with respect to the scrollbars
1012 * for the scrolled window. See gtk_scrolled_window_set_placement().
1014 * Return value: the current placement value.
1016 * See also gtk_scrolled_window_set_placement() and
1017 * gtk_scrolled_window_unset_placement().
1020 gtk_scrolled_window_get_placement (GtkScrolledWindow *scrolled_window)
1022 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_CORNER_TOP_LEFT);
1024 return scrolled_window->priv->window_placement;
1028 * gtk_scrolled_window_unset_placement:
1029 * @scrolled_window: a #GtkScrolledWindow
1031 * Unsets the placement of the contents with respect to the scrollbars
1032 * for the scrolled window. If no window placement is set for a scrolled
1033 * window, it obeys the "gtk-scrolled-window-placement" XSETTING.
1035 * See also gtk_scrolled_window_set_placement() and
1036 * gtk_scrolled_window_get_placement().
1041 gtk_scrolled_window_unset_placement (GtkScrolledWindow *scrolled_window)
1043 GtkScrolledWindowPrivate *priv;
1045 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1047 priv = scrolled_window->priv;
1049 if (priv->window_placement_set)
1051 priv->window_placement_set = FALSE;
1053 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
1055 g_object_notify (G_OBJECT (scrolled_window), "window-placement-set");
1060 * gtk_scrolled_window_set_shadow_type:
1061 * @scrolled_window: a #GtkScrolledWindow
1062 * @type: kind of shadow to draw around scrolled window contents
1064 * Changes the type of shadow drawn around the contents of
1069 gtk_scrolled_window_set_shadow_type (GtkScrolledWindow *scrolled_window,
1072 GtkScrolledWindowPrivate *priv;
1074 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1075 g_return_if_fail (type >= GTK_SHADOW_NONE && type <= GTK_SHADOW_ETCHED_OUT);
1077 priv = scrolled_window->priv;
1079 if (priv->shadow_type != type)
1081 priv->shadow_type = type;
1083 if (gtk_widget_is_drawable (GTK_WIDGET (scrolled_window)))
1084 gtk_widget_queue_draw (GTK_WIDGET (scrolled_window));
1086 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
1088 g_object_notify (G_OBJECT (scrolled_window), "shadow-type");
1093 * gtk_scrolled_window_get_shadow_type:
1094 * @scrolled_window: a #GtkScrolledWindow
1096 * Gets the shadow type of the scrolled window. See
1097 * gtk_scrolled_window_set_shadow_type().
1099 * Return value: the current shadow type
1102 gtk_scrolled_window_get_shadow_type (GtkScrolledWindow *scrolled_window)
1104 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_SHADOW_NONE);
1106 return scrolled_window->priv->shadow_type;
1110 * gtk_scrolled_window_set_kinetic_scrolling:
1111 * @scrolled_window: a #GtkScrolledWindow
1112 * @kinetic_scrolling: %TRUE to enable kinetic scrolling
1114 * Turns kinetic scrolling on or off.
1115 * Kinetic scrolling only applies to devices with source
1116 * %GDK_SOURCE_TOUCHSCREEN.
1121 gtk_scrolled_window_set_kinetic_scrolling (GtkScrolledWindow *scrolled_window,
1122 gboolean kinetic_scrolling)
1124 GtkScrolledWindowPrivate *priv;
1126 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1128 priv = scrolled_window->priv;
1129 if (priv->kinetic_scrolling == kinetic_scrolling)
1132 priv->kinetic_scrolling = kinetic_scrolling;
1133 if (priv->kinetic_scrolling)
1135 _gtk_widget_set_captured_event_handler (GTK_WIDGET (scrolled_window),
1136 gtk_scrolled_window_captured_event);
1140 _gtk_widget_set_captured_event_handler (GTK_WIDGET (scrolled_window), NULL);
1141 if (priv->release_timeout_id)
1143 g_source_remove (priv->release_timeout_id);
1144 priv->release_timeout_id = 0;
1146 if (priv->deceleration_id)
1148 g_source_remove (priv->deceleration_id);
1149 priv->deceleration_id = 0;
1152 g_object_notify (G_OBJECT (scrolled_window), "kinetic-scrolling");
1156 * gtk_scrolled_window_get_kinetic_scrolling:
1157 * @scrolled_window: a #GtkScrolledWindow
1159 * Returns the specified kinetic scrolling behavior.
1161 * Return value: the scrolling behavior flags.
1166 gtk_scrolled_window_get_kinetic_scrolling (GtkScrolledWindow *scrolled_window)
1168 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), FALSE);
1170 return scrolled_window->priv->kinetic_scrolling;
1174 * gtk_scrolled_window_set_capture_button_press:
1175 * @scrolled_window: a #GtkScrolledWindow
1176 * @capture_button_press: %TRUE to capture button presses
1178 * Changes the behaviour of @scrolled_window wrt. to the initial
1179 * event that possibly starts kinetic scrolling. When @capture_button_press
1180 * is set to %TRUE, the event is captured by the scrolled window, and
1181 * then later replayed if it is meant to go to the child widget.
1183 * This should be enabled if any child widgets perform non-reversible
1184 * actions on #GtkWidget::button-press-event. If they don't, and handle
1185 * additionally handle #GtkWidget::grab-broken-event, it might be better
1186 * to set @capture_button_press to %FALSE.
1188 * This setting only has an effect if kinetic scrolling is enabled.
1193 gtk_scrolled_window_set_capture_button_press (GtkScrolledWindow *scrolled_window,
1194 gboolean capture_button_press)
1196 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
1198 scrolled_window->priv->capture_button_press = capture_button_press;
1202 * gtk_scrolled_window_get_capture_button_press:
1203 * @scrolled_window: a #GtkScrolledWindow
1205 * Return whether button presses are captured during kinetic
1206 * scrolling. See gtk_scrolled_window_set_capture_button_press().
1208 * Returns: %TRUE if button presses are captured during kinetic scrolling
1213 gtk_scrolled_window_get_capture_button_press (GtkScrolledWindow *scrolled_window)
1215 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), FALSE);
1217 return scrolled_window->priv->capture_button_press;
1222 gtk_scrolled_window_destroy (GtkWidget *widget)
1224 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
1225 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1227 if (priv->hscrollbar)
1229 g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)),
1230 gtk_scrolled_window_adjustment_changed,
1232 gtk_widget_unparent (priv->hscrollbar);
1233 gtk_widget_destroy (priv->hscrollbar);
1234 g_object_unref (priv->hscrollbar);
1235 priv->hscrollbar = NULL;
1237 if (priv->vscrollbar)
1239 g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)),
1240 gtk_scrolled_window_adjustment_changed,
1242 gtk_widget_unparent (priv->vscrollbar);
1243 gtk_widget_destroy (priv->vscrollbar);
1244 g_object_unref (priv->vscrollbar);
1245 priv->vscrollbar = NULL;
1248 if (priv->release_timeout_id)
1250 g_source_remove (priv->release_timeout_id);
1251 priv->release_timeout_id = 0;
1253 if (priv->deceleration_id)
1255 g_source_remove (priv->deceleration_id);
1256 priv->deceleration_id = 0;
1259 if (priv->button_press_event)
1261 gdk_event_free (priv->button_press_event);
1262 priv->button_press_event = NULL;
1265 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->destroy (widget);
1269 gtk_scrolled_window_set_property (GObject *object,
1271 const GValue *value,
1274 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
1275 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1279 case PROP_HADJUSTMENT:
1280 gtk_scrolled_window_set_hadjustment (scrolled_window,
1281 g_value_get_object (value));
1283 case PROP_VADJUSTMENT:
1284 gtk_scrolled_window_set_vadjustment (scrolled_window,
1285 g_value_get_object (value));
1287 case PROP_HSCROLLBAR_POLICY:
1288 gtk_scrolled_window_set_policy (scrolled_window,
1289 g_value_get_enum (value),
1290 priv->vscrollbar_policy);
1292 case PROP_VSCROLLBAR_POLICY:
1293 gtk_scrolled_window_set_policy (scrolled_window,
1294 priv->hscrollbar_policy,
1295 g_value_get_enum (value));
1297 case PROP_WINDOW_PLACEMENT:
1298 gtk_scrolled_window_set_placement_internal (scrolled_window,
1299 g_value_get_enum (value));
1301 case PROP_WINDOW_PLACEMENT_SET:
1302 gtk_scrolled_window_set_placement_set (scrolled_window,
1303 g_value_get_boolean (value),
1306 case PROP_SHADOW_TYPE:
1307 gtk_scrolled_window_set_shadow_type (scrolled_window,
1308 g_value_get_enum (value));
1310 case PROP_MIN_CONTENT_WIDTH:
1311 gtk_scrolled_window_set_min_content_width (scrolled_window,
1312 g_value_get_int (value));
1314 case PROP_MIN_CONTENT_HEIGHT:
1315 gtk_scrolled_window_set_min_content_height (scrolled_window,
1316 g_value_get_int (value));
1318 case PROP_KINETIC_SCROLLING:
1319 gtk_scrolled_window_set_kinetic_scrolling (scrolled_window,
1320 g_value_get_boolean (value));
1323 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1329 gtk_scrolled_window_get_property (GObject *object,
1334 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
1335 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1339 case PROP_HADJUSTMENT:
1340 g_value_set_object (value,
1341 G_OBJECT (gtk_scrolled_window_get_hadjustment (scrolled_window)));
1343 case PROP_VADJUSTMENT:
1344 g_value_set_object (value,
1345 G_OBJECT (gtk_scrolled_window_get_vadjustment (scrolled_window)));
1347 case PROP_WINDOW_PLACEMENT:
1348 g_value_set_enum (value, priv->window_placement);
1350 case PROP_WINDOW_PLACEMENT_SET:
1351 g_value_set_boolean (value, priv->window_placement_set);
1353 case PROP_SHADOW_TYPE:
1354 g_value_set_enum (value, priv->shadow_type);
1356 case PROP_HSCROLLBAR_POLICY:
1357 g_value_set_enum (value, priv->hscrollbar_policy);
1359 case PROP_VSCROLLBAR_POLICY:
1360 g_value_set_enum (value, priv->vscrollbar_policy);
1362 case PROP_MIN_CONTENT_WIDTH:
1363 g_value_set_int (value, priv->min_content_width);
1365 case PROP_MIN_CONTENT_HEIGHT:
1366 g_value_set_int (value, priv->min_content_height);
1368 case PROP_KINETIC_SCROLLING:
1369 g_value_set_boolean (value, priv->kinetic_scrolling);
1372 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1378 traverse_container (GtkWidget *widget,
1381 if (GTK_IS_SCROLLED_WINDOW (widget))
1383 gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget));
1384 gtk_widget_queue_resize (widget);
1386 else if (GTK_IS_CONTAINER (widget))
1387 gtk_container_forall (GTK_CONTAINER (widget), traverse_container, NULL);
1391 gtk_scrolled_window_settings_changed (GtkSettings *settings)
1395 list = gtk_window_list_toplevels ();
1397 for (l = list; l; l = l->next)
1398 gtk_container_forall (GTK_CONTAINER (l->data),
1399 traverse_container, NULL);
1405 gtk_scrolled_window_screen_changed (GtkWidget *widget,
1406 GdkScreen *previous_screen)
1408 GtkSettings *settings;
1409 guint window_placement_connection;
1411 gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget));
1413 if (!gtk_widget_has_screen (widget))
1416 settings = gtk_widget_get_settings (widget);
1418 window_placement_connection =
1419 GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (settings),
1420 "gtk-scrolled-window-connection"));
1422 if (window_placement_connection)
1425 window_placement_connection =
1426 g_signal_connect (settings, "notify::gtk-scrolled-window-placement",
1427 G_CALLBACK (gtk_scrolled_window_settings_changed), NULL);
1428 g_object_set_data (G_OBJECT (settings),
1429 I_("gtk-scrolled-window-connection"),
1430 GUINT_TO_POINTER (window_placement_connection));
1434 gtk_scrolled_window_draw_scrollbars_junction (GtkScrolledWindow *scrolled_window,
1437 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1438 GtkWidget *widget = GTK_WIDGET (scrolled_window);
1439 GtkAllocation wid_allocation, hscr_allocation, vscr_allocation;
1440 GtkStyleContext *context;
1441 GdkRectangle junction_rect;
1442 gboolean is_rtl, scrollbars_within_bevel;
1444 is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
1445 gtk_widget_get_allocation (widget, &wid_allocation);
1446 gtk_widget_get_allocation (GTK_WIDGET (priv->hscrollbar), &hscr_allocation);
1447 gtk_widget_get_allocation (GTK_WIDGET (priv->vscrollbar), &vscr_allocation);
1449 gtk_widget_style_get (widget,
1450 "scrollbars-within-bevel", &scrollbars_within_bevel,
1452 context = gtk_widget_get_style_context (widget);
1454 if (scrollbars_within_bevel &&
1455 priv->shadow_type != GTK_SHADOW_NONE)
1457 GtkStateFlags state;
1458 GtkBorder padding, border;
1460 state = gtk_widget_get_state_flags (widget);
1462 gtk_style_context_save (context);
1463 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1464 gtk_style_context_get_padding (context, state, &padding);
1465 gtk_style_context_get_border (context, state, &border);
1466 gtk_style_context_restore (context);
1468 junction_rect.x = padding.left + border.left;
1469 junction_rect.y = padding.top + border.top;
1473 junction_rect.x = 0;
1474 junction_rect.y = 0;
1477 junction_rect.width = vscr_allocation.width;
1478 junction_rect.height = hscr_allocation.height;
1481 (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
1482 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
1484 (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1485 priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
1486 junction_rect.x += hscr_allocation.width;
1488 if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1489 priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
1490 junction_rect.y += vscr_allocation.height;
1492 gtk_style_context_save (context);
1493 gtk_style_context_add_class (context, GTK_STYLE_CLASS_SCROLLBARS_JUNCTION);
1495 gtk_render_background (context, cr,
1496 junction_rect.x, junction_rect.y,
1497 junction_rect.width, junction_rect.height);
1498 gtk_render_frame (context, cr,
1499 junction_rect.x, junction_rect.y,
1500 junction_rect.width, junction_rect.height);
1502 gtk_style_context_restore (context);
1506 gtk_scrolled_window_draw (GtkWidget *widget,
1509 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
1510 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1511 GtkAllocation relative_allocation;
1512 GtkStyleContext *context;
1514 context = gtk_widget_get_style_context (widget);
1515 gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
1517 gtk_render_background (context, cr,
1519 gtk_widget_get_allocated_width (widget), gtk_widget_get_allocated_height (widget));
1521 if (priv->hscrollbar_visible &&
1522 priv->vscrollbar_visible)
1523 gtk_scrolled_window_draw_scrollbars_junction (scrolled_window, cr);
1525 if (priv->shadow_type != GTK_SHADOW_NONE)
1527 gboolean scrollbars_within_bevel;
1529 gtk_style_context_save (context);
1530 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1532 gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL);
1534 if (!scrollbars_within_bevel)
1536 GtkStateFlags state;
1537 GtkBorder padding, border;
1539 state = gtk_widget_get_state_flags (widget);
1540 gtk_style_context_get_padding (context, state, &padding);
1541 gtk_style_context_get_border (context, state, &border);
1543 relative_allocation.x -= padding.left + border.left;
1544 relative_allocation.y -= padding.top + border.top;
1545 relative_allocation.width += padding.left + padding.right + border.left + border.right;
1546 relative_allocation.height += padding.top + padding.bottom + border.top + border.bottom;
1550 relative_allocation.x = 0;
1551 relative_allocation.y = 0;
1552 relative_allocation.width = gtk_widget_get_allocated_width (widget);
1553 relative_allocation.height = gtk_widget_get_allocated_height (widget);
1556 gtk_render_frame (context, cr,
1557 relative_allocation.x,
1558 relative_allocation.y,
1559 relative_allocation.width,
1560 relative_allocation.height);
1562 gtk_style_context_restore (context);
1565 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->draw (widget, cr);
1571 gtk_scrolled_window_forall (GtkContainer *container,
1572 gboolean include_internals,
1573 GtkCallback callback,
1574 gpointer callback_data)
1576 GtkScrolledWindowPrivate *priv;
1577 GtkScrolledWindow *scrolled_window;
1579 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
1580 g_return_if_fail (callback != NULL);
1582 GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->forall (container,
1586 if (include_internals)
1588 scrolled_window = GTK_SCROLLED_WINDOW (container);
1589 priv = scrolled_window->priv;
1591 if (priv->vscrollbar)
1592 callback (priv->vscrollbar, callback_data);
1593 if (priv->hscrollbar)
1594 callback (priv->hscrollbar, callback_data);
1599 gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window,
1600 GtkScrollType scroll,
1601 gboolean horizontal)
1603 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1604 GtkAdjustment *adjustment = NULL;
1608 case GTK_SCROLL_STEP_UP:
1609 scroll = GTK_SCROLL_STEP_BACKWARD;
1612 case GTK_SCROLL_STEP_DOWN:
1613 scroll = GTK_SCROLL_STEP_FORWARD;
1616 case GTK_SCROLL_STEP_LEFT:
1617 scroll = GTK_SCROLL_STEP_BACKWARD;
1620 case GTK_SCROLL_STEP_RIGHT:
1621 scroll = GTK_SCROLL_STEP_FORWARD;
1624 case GTK_SCROLL_PAGE_UP:
1625 scroll = GTK_SCROLL_PAGE_BACKWARD;
1628 case GTK_SCROLL_PAGE_DOWN:
1629 scroll = GTK_SCROLL_PAGE_FORWARD;
1632 case GTK_SCROLL_PAGE_LEFT:
1633 scroll = GTK_SCROLL_STEP_BACKWARD;
1636 case GTK_SCROLL_PAGE_RIGHT:
1637 scroll = GTK_SCROLL_STEP_FORWARD;
1640 case GTK_SCROLL_STEP_BACKWARD:
1641 case GTK_SCROLL_STEP_FORWARD:
1642 case GTK_SCROLL_PAGE_BACKWARD:
1643 case GTK_SCROLL_PAGE_FORWARD:
1644 case GTK_SCROLL_START:
1645 case GTK_SCROLL_END:
1648 g_warning ("Invalid scroll type %u for GtkScrolledWindow::scroll-child", scroll);
1652 if ((horizontal && (!priv->hscrollbar || !priv->hscrollbar_visible)) ||
1653 (!horizontal && (!priv->vscrollbar || !priv->vscrollbar_visible)))
1658 if (priv->hscrollbar)
1659 adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
1663 if (priv->vscrollbar)
1664 adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
1669 gdouble value = gtk_adjustment_get_value (adjustment);
1673 case GTK_SCROLL_STEP_FORWARD:
1674 value += gtk_adjustment_get_step_increment (adjustment);
1676 case GTK_SCROLL_STEP_BACKWARD:
1677 value -= gtk_adjustment_get_step_increment (adjustment);
1679 case GTK_SCROLL_PAGE_FORWARD:
1680 value += gtk_adjustment_get_page_increment (adjustment);
1682 case GTK_SCROLL_PAGE_BACKWARD:
1683 value -= gtk_adjustment_get_page_increment (adjustment);
1685 case GTK_SCROLL_START:
1686 value = gtk_adjustment_get_lower (adjustment);
1688 case GTK_SCROLL_END:
1689 value = gtk_adjustment_get_upper (adjustment);
1692 g_assert_not_reached ();
1696 gtk_adjustment_set_value (adjustment, value);
1705 gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window,
1706 GtkDirectionType direction_type)
1708 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1709 GtkWidget *toplevel;
1711 /* Focus out of the scrolled window entirely. We do this by setting
1712 * a flag, then propagating the focus motion to the notebook.
1714 toplevel = gtk_widget_get_toplevel (GTK_WIDGET (scrolled_window));
1715 if (!gtk_widget_is_toplevel (toplevel))
1718 g_object_ref (scrolled_window);
1720 priv->focus_out = TRUE;
1721 g_signal_emit_by_name (toplevel, "move-focus", direction_type);
1722 priv->focus_out = FALSE;
1724 g_object_unref (scrolled_window);
1728 gtk_scrolled_window_relative_allocation (GtkWidget *widget,
1729 GtkAllocation *allocation)
1731 GtkAllocation widget_allocation;
1732 GtkScrolledWindow *scrolled_window;
1733 GtkScrolledWindowPrivate *priv;
1738 g_return_if_fail (widget != NULL);
1739 g_return_if_fail (allocation != NULL);
1741 scrolled_window = GTK_SCROLLED_WINDOW (widget);
1742 priv = scrolled_window->priv;
1744 /* Get possible scrollbar dimensions */
1745 sb_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
1746 gtk_widget_get_preferred_height (priv->hscrollbar, &sb_height, NULL);
1747 gtk_widget_get_preferred_width (priv->vscrollbar, &sb_width, NULL);
1749 gtk_widget_get_allocation (widget, &widget_allocation);
1753 allocation->width = widget_allocation.width;
1754 allocation->height = widget_allocation.height;
1756 /* Subtract some things from our available allocation size */
1757 if (priv->shadow_type != GTK_SHADOW_NONE)
1759 GtkStyleContext *context;
1760 GtkStateFlags state;
1761 GtkBorder padding, border;
1763 context = gtk_widget_get_style_context (widget);
1764 state = gtk_widget_get_state_flags (widget);
1766 gtk_style_context_save (context);
1767 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1769 gtk_style_context_get_border (context, state, &border);
1770 gtk_style_context_get_padding (context, state, &padding);
1772 allocation->x += padding.left + border.left;
1773 allocation->y += padding.top + border.top;
1774 allocation->width = MAX (1, allocation->width - (padding.left + border.left + padding.right + border.right));
1775 allocation->height = MAX (1, allocation->height - (padding.top + border.top + padding.bottom + border.bottom));
1777 gtk_style_context_restore (context);
1780 if (priv->vscrollbar_visible)
1784 is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
1787 (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
1788 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
1790 (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
1791 priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
1792 allocation->x += (sb_width + sb_spacing);
1794 allocation->width = MAX (1, allocation->width - (sb_width + sb_spacing));
1796 if (priv->hscrollbar_visible)
1799 if (priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT ||
1800 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)
1801 allocation->y += (sb_height + sb_spacing);
1803 allocation->height = MAX (1, allocation->height - (sb_height + sb_spacing));
1808 _gtk_scrolled_window_get_overshoot (GtkScrolledWindow *scrolled_window,
1812 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1813 GtkAdjustment *vadjustment, *hadjustment;
1814 gdouble lower, upper, x, y;
1816 /* Vertical overshoot */
1817 vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
1818 lower = gtk_adjustment_get_lower (vadjustment);
1819 upper = gtk_adjustment_get_upper (vadjustment) -
1820 gtk_adjustment_get_page_size (vadjustment);
1822 if (priv->unclamped_vadj_value < lower)
1823 y = priv->unclamped_vadj_value - lower;
1824 else if (priv->unclamped_vadj_value > upper)
1825 y = priv->unclamped_vadj_value - upper;
1829 /* Horizontal overshoot */
1830 hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
1831 lower = gtk_adjustment_get_lower (hadjustment);
1832 upper = gtk_adjustment_get_upper (hadjustment) -
1833 gtk_adjustment_get_page_size (hadjustment);
1835 if (priv->unclamped_hadj_value < lower)
1836 x = priv->unclamped_hadj_value - lower;
1837 else if (priv->unclamped_hadj_value > upper)
1838 x = priv->unclamped_hadj_value - upper;
1848 return (x != 0 || y != 0);
1852 _gtk_scrolled_window_allocate_overshoot_window (GtkScrolledWindow *scrolled_window)
1854 GtkAllocation window_allocation, relative_allocation, allocation;
1855 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
1856 GtkWidget *widget = GTK_WIDGET (scrolled_window);
1857 gint overshoot_x, overshoot_y;
1859 if (!gtk_widget_get_realized (widget))
1862 gtk_widget_get_allocation (widget, &allocation);
1863 gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
1864 _gtk_scrolled_window_get_overshoot (scrolled_window,
1865 &overshoot_x, &overshoot_y);
1867 window_allocation = relative_allocation;
1868 window_allocation.x += allocation.x;
1869 window_allocation.y += allocation.y;
1871 /* Handle displacement to the left/top by moving the overshoot
1872 * window, overshooting to the bottom/right is handled in
1873 * gtk_scrolled_window_allocate_child()
1875 if (overshoot_x < 0)
1876 window_allocation.x += -overshoot_x;
1878 if (overshoot_y < 0)
1879 window_allocation.y += -overshoot_y;
1881 window_allocation.width -= ABS (overshoot_x);
1882 window_allocation.height -= ABS (overshoot_y);
1884 gdk_window_move_resize (priv->overshoot_window,
1885 window_allocation.x, window_allocation.y,
1886 window_allocation.width, window_allocation.height);
1890 gtk_scrolled_window_allocate_child (GtkScrolledWindow *swindow,
1891 GtkAllocation *relative_allocation)
1893 GtkWidget *widget = GTK_WIDGET (swindow), *child;
1894 GtkAllocation allocation;
1895 GtkAllocation child_allocation;
1896 gint overshoot_x, overshoot_y;
1898 child = gtk_bin_get_child (GTK_BIN (widget));
1900 gtk_widget_get_allocation (widget, &allocation);
1902 gtk_scrolled_window_relative_allocation (widget, relative_allocation);
1903 _gtk_scrolled_window_get_overshoot (swindow, &overshoot_x, &overshoot_y);
1905 /* Handle overshooting to the right/bottom by relocating the
1906 * widget allocation to negative coordinates, so these edges
1907 * stick to the overshoot window border.
1909 if (overshoot_x > 0)
1910 child_allocation.x = -overshoot_x;
1912 child_allocation.x = 0;
1914 if (overshoot_y > 0)
1915 child_allocation.y = -overshoot_y;
1917 child_allocation.y = 0;
1919 child_allocation.width = relative_allocation->width;
1920 child_allocation.height = relative_allocation->height;
1922 gtk_widget_size_allocate (child, &child_allocation);
1926 gtk_scrolled_window_size_allocate (GtkWidget *widget,
1927 GtkAllocation *allocation)
1929 GtkScrolledWindow *scrolled_window;
1930 GtkScrolledWindowPrivate *priv;
1931 GtkStyleContext *context;
1932 GtkStateFlags state;
1933 GtkBorder padding, border;
1935 GtkAllocation relative_allocation;
1936 GtkAllocation child_allocation;
1938 gboolean scrollbars_within_bevel;
1943 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
1944 g_return_if_fail (allocation != NULL);
1946 scrolled_window = GTK_SCROLLED_WINDOW (widget);
1947 bin = GTK_BIN (scrolled_window);
1948 priv = scrolled_window->priv;
1950 /* Get possible scrollbar dimensions */
1951 sb_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
1952 gtk_widget_get_preferred_height (priv->hscrollbar, &sb_height, NULL);
1953 gtk_widget_get_preferred_width (priv->vscrollbar, &sb_width, NULL);
1955 context = gtk_widget_get_style_context (widget);
1956 state = gtk_widget_get_state_flags (widget);
1958 gtk_style_context_save (context);
1959 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
1961 gtk_style_context_get_padding (context, state, &padding);
1962 gtk_style_context_get_border (context, state, &border);
1964 gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL);
1966 gtk_widget_set_allocation (widget, allocation);
1967 gtk_style_context_restore (context);
1969 if (priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
1970 priv->hscrollbar_visible = TRUE;
1971 else if (priv->hscrollbar_policy == GTK_POLICY_NEVER)
1972 priv->hscrollbar_visible = FALSE;
1973 if (priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
1974 priv->vscrollbar_visible = TRUE;
1975 else if (priv->vscrollbar_policy == GTK_POLICY_NEVER)
1976 priv->vscrollbar_visible = FALSE;
1978 child = gtk_bin_get_child (bin);
1979 if (child && gtk_widget_get_visible (child))
1981 gint child_scroll_width;
1982 gint child_scroll_height;
1983 GtkScrollablePolicy hscroll_policy;
1984 GtkScrollablePolicy vscroll_policy;
1985 gboolean previous_hvis;
1986 gboolean previous_vvis;
1989 hscroll_policy = GTK_IS_SCROLLABLE (child)
1990 ? gtk_scrollable_get_hscroll_policy (GTK_SCROLLABLE (child))
1991 : GTK_SCROLL_MINIMUM;
1992 vscroll_policy = GTK_IS_SCROLLABLE (child)
1993 ? gtk_scrollable_get_vscroll_policy (GTK_SCROLLABLE (child))
1994 : GTK_SCROLL_MINIMUM;
1996 /* Determine scrollbar visibility first via hfw apis */
1997 if (gtk_widget_get_request_mode (child) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
1999 if (hscroll_policy == GTK_SCROLL_MINIMUM)
2000 gtk_widget_get_preferred_width (child, &child_scroll_width, NULL);
2002 gtk_widget_get_preferred_width (child, NULL, &child_scroll_width);
2004 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
2006 /* First try without a vertical scrollbar if the content will fit the height
2007 * given the extra width of the scrollbar */
2008 if (vscroll_policy == GTK_SCROLL_MINIMUM)
2009 gtk_widget_get_preferred_height_for_width (child,
2010 MAX (allocation->width, child_scroll_width),
2011 &child_scroll_height, NULL);
2013 gtk_widget_get_preferred_height_for_width (child,
2014 MAX (allocation->width, child_scroll_width),
2015 NULL, &child_scroll_height);
2017 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
2019 /* Does the content height fit the allocation height ? */
2020 priv->vscrollbar_visible = child_scroll_height > allocation->height;
2022 /* Does the content width fit the allocation with minus a possible scrollbar ? */
2023 priv->hscrollbar_visible =
2024 child_scroll_width > allocation->width -
2025 (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
2027 /* Now that we've guessed the hscrollbar, does the content height fit
2028 * the possible new allocation height ? */
2029 priv->vscrollbar_visible =
2030 child_scroll_height > allocation->height -
2031 (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
2033 /* Now that we've guessed the vscrollbar, does the content width fit
2034 * the possible new allocation width ? */
2035 priv->hscrollbar_visible =
2036 child_scroll_width > allocation->width -
2037 (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
2039 else /* priv->hscrollbar_policy != GTK_POLICY_AUTOMATIC */
2041 priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
2042 priv->vscrollbar_visible = child_scroll_height > allocation->height -
2043 (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
2046 else /* priv->vscrollbar_policy != GTK_POLICY_AUTOMATIC */
2048 priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
2050 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
2051 priv->hscrollbar_visible =
2052 child_scroll_width > allocation->width -
2053 (priv->vscrollbar_visible ? 0 : sb_width + sb_spacing);
2055 priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
2058 else /* GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT */
2060 if (vscroll_policy == GTK_SCROLL_MINIMUM)
2061 gtk_widget_get_preferred_height (child, &child_scroll_height, NULL);
2063 gtk_widget_get_preferred_height (child, NULL, &child_scroll_height);
2065 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
2067 /* First try without a horizontal scrollbar if the content will fit the width
2068 * given the extra height of the scrollbar */
2069 if (hscroll_policy == GTK_SCROLL_MINIMUM)
2070 gtk_widget_get_preferred_width_for_height (child,
2071 MAX (allocation->height, child_scroll_height),
2072 &child_scroll_width, NULL);
2074 gtk_widget_get_preferred_width_for_height (child,
2075 MAX (allocation->height, child_scroll_height),
2076 NULL, &child_scroll_width);
2078 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
2080 /* Does the content width fit the allocation width ? */
2081 priv->hscrollbar_visible = child_scroll_width > allocation->width;
2083 /* Does the content height fit the allocation with minus a possible scrollbar ? */
2084 priv->vscrollbar_visible =
2085 child_scroll_height > allocation->height -
2086 (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
2088 /* Now that we've guessed the vscrollbar, does the content width fit
2089 * the possible new allocation width ? */
2090 priv->hscrollbar_visible =
2091 child_scroll_width > allocation->width -
2092 (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
2094 /* Now that we've guessed the hscrollbar, does the content height fit
2095 * the possible new allocation height ? */
2096 priv->vscrollbar_visible =
2097 child_scroll_height > allocation->height -
2098 (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
2100 else /* priv->vscrollbar_policy != GTK_POLICY_AUTOMATIC */
2102 priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
2103 priv->hscrollbar_visible = child_scroll_width > allocation->width -
2104 (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
2107 else /* priv->hscrollbar_policy != GTK_POLICY_AUTOMATIC */
2109 priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
2111 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
2112 priv->vscrollbar_visible =
2113 child_scroll_height > allocation->height -
2114 (priv->hscrollbar_visible ? 0 : sb_height + sb_spacing);
2116 priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
2120 /* Now after guessing scrollbar visibility; fall back on the allocation loop which
2121 * observes the adjustments to detect scrollbar visibility and also avoids
2122 * infinite recursion
2126 previous_hvis = priv->hscrollbar_visible;
2127 previous_vvis = priv->vscrollbar_visible;
2128 gtk_scrolled_window_allocate_child (scrolled_window, &relative_allocation);
2130 /* Explicitly force scrollbar visibility checks.
2132 * Since we make a guess above, the child might not decide to update the adjustments
2133 * if they logically did not change since the last configuration
2135 if (priv->hscrollbar)
2136 gtk_scrolled_window_adjustment_changed
2137 (gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)), scrolled_window);
2139 if (priv->vscrollbar)
2140 gtk_scrolled_window_adjustment_changed
2141 (gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)), scrolled_window);
2143 /* If, after the first iteration, the hscrollbar and the
2144 * vscrollbar flip visiblity... or if one of the scrollbars flip
2145 * on each itteration indefinitly/infinitely, then we just need both
2149 previous_hvis != priv->hscrollbar_visible &&
2150 previous_vvis != priv->vscrollbar_visible) || count > 3)
2152 priv->hscrollbar_visible = TRUE;
2153 priv->vscrollbar_visible = TRUE;
2155 gtk_scrolled_window_allocate_child (scrolled_window, &relative_allocation);
2162 while (previous_hvis != priv->hscrollbar_visible ||
2163 previous_vvis != priv->vscrollbar_visible);
2167 priv->hscrollbar_visible = priv->hscrollbar_policy == GTK_POLICY_ALWAYS;
2168 priv->vscrollbar_visible = priv->vscrollbar_policy == GTK_POLICY_ALWAYS;
2169 gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
2172 gtk_widget_set_child_visible (priv->hscrollbar, priv->hscrollbar_visible);
2173 if (priv->hscrollbar_visible)
2175 child_allocation.x = relative_allocation.x;
2176 if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
2177 priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
2178 child_allocation.y = (relative_allocation.y +
2179 relative_allocation.height +
2182 child_allocation.y = relative_allocation.y - sb_spacing - sb_height;
2184 child_allocation.width = relative_allocation.width;
2185 child_allocation.height = sb_height;
2186 child_allocation.x += allocation->x;
2187 child_allocation.y += allocation->y;
2189 if (priv->shadow_type != GTK_SHADOW_NONE)
2191 if (!scrollbars_within_bevel)
2193 child_allocation.x -= padding.left + border.left;
2194 child_allocation.width += padding.left + padding.right + border.left + border.right;
2196 if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
2197 priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
2198 child_allocation.y += padding.bottom + border.bottom;
2200 child_allocation.y -= padding.top + border.top;
2204 gtk_widget_size_allocate (priv->hscrollbar, &child_allocation);
2207 gtk_widget_set_child_visible (priv->vscrollbar, priv->vscrollbar_visible);
2208 if (priv->vscrollbar_visible)
2210 if ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL &&
2211 (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
2212 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
2213 (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
2214 (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
2215 priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
2216 child_allocation.x = (relative_allocation.x +
2217 relative_allocation.width +
2220 child_allocation.x = relative_allocation.x - sb_spacing - sb_width;
2222 child_allocation.y = relative_allocation.y;
2223 child_allocation.width = sb_width;
2224 child_allocation.height = relative_allocation.height;
2225 child_allocation.x += allocation->x;
2226 child_allocation.y += allocation->y;
2228 if (priv->shadow_type != GTK_SHADOW_NONE)
2230 if (!scrollbars_within_bevel)
2232 child_allocation.y -= padding.top + border.top;
2233 child_allocation.height += padding.top + padding.bottom + border.top + border.bottom;
2235 if ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL &&
2236 (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
2237 priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
2238 (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
2239 (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
2240 priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
2241 child_allocation.x += padding.right + border.right;
2243 child_allocation.x -= padding.left + border.left;
2247 gtk_widget_size_allocate (priv->vscrollbar, &child_allocation);
2250 _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
2254 gtk_scrolled_window_scroll_event (GtkWidget *widget,
2255 GdkEventScroll *event)
2257 GtkScrolledWindowPrivate *priv;
2258 GtkScrolledWindow *scrolled_window;
2259 gboolean handled = FALSE;
2264 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (widget), FALSE);
2265 g_return_val_if_fail (event != NULL, FALSE);
2267 scrolled_window = GTK_SCROLLED_WINDOW (widget);
2268 priv = scrolled_window->priv;
2270 if (gdk_event_get_scroll_deltas ((GdkEvent *) event, &delta_x, &delta_y))
2272 if (delta_x != 0.0 && priv->hscrollbar &&
2273 gtk_widget_get_visible (priv->hscrollbar))
2278 gdouble scroll_unit;
2280 adj = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
2281 page_size = gtk_adjustment_get_page_size (adj);
2282 scroll_unit = pow (page_size, 2.0 / 3.0);
2284 new_value = CLAMP (gtk_adjustment_get_value (adj) + delta_x * scroll_unit,
2285 gtk_adjustment_get_lower (adj),
2286 gtk_adjustment_get_upper (adj) -
2287 gtk_adjustment_get_page_size (adj));
2289 gtk_adjustment_set_value (adj, new_value);
2294 if (delta_y != 0.0 && priv->vscrollbar &&
2295 gtk_widget_get_visible (priv->vscrollbar))
2300 gdouble scroll_unit;
2302 adj = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
2303 page_size = gtk_adjustment_get_page_size (adj);
2304 scroll_unit = pow (page_size, 2.0 / 3.0);
2306 new_value = CLAMP (gtk_adjustment_get_value (adj) + delta_y * scroll_unit,
2307 gtk_adjustment_get_lower (adj),
2308 gtk_adjustment_get_upper (adj) -
2309 gtk_adjustment_get_page_size (adj));
2311 gtk_adjustment_set_value (adj, new_value);
2320 if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_DOWN)
2321 range = priv->vscrollbar;
2323 range = priv->hscrollbar;
2325 if (range && gtk_widget_get_visible (range))
2327 GtkAdjustment *adj = gtk_range_get_adjustment (GTK_RANGE (range));
2330 delta = _gtk_range_get_wheel_delta (GTK_RANGE (range), event);
2332 new_value = CLAMP (gtk_adjustment_get_value (adj) + delta,
2333 gtk_adjustment_get_lower (adj),
2334 gtk_adjustment_get_upper (adj) -
2335 gtk_adjustment_get_page_size (adj));
2337 gtk_adjustment_set_value (adj, new_value);
2347 _gtk_scrolled_window_set_adjustment_value (GtkScrolledWindow *scrolled_window,
2348 GtkAdjustment *adjustment,
2350 gboolean allow_overshooting,
2351 gboolean snap_to_border)
2353 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2354 gdouble lower, upper, *prev_value;
2356 lower = gtk_adjustment_get_lower (adjustment);
2357 upper = gtk_adjustment_get_upper (adjustment) -
2358 gtk_adjustment_get_page_size (adjustment);
2360 if (adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
2361 prev_value = &priv->unclamped_hadj_value;
2362 else if (adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
2363 prev_value = &priv->unclamped_vadj_value;
2369 if (*prev_value < 0 && value > 0)
2371 else if (*prev_value > upper && value < upper)
2375 if (allow_overshooting)
2377 lower -= MAX_OVERSHOOT_DISTANCE;
2378 upper += MAX_OVERSHOOT_DISTANCE;
2381 *prev_value = CLAMP (value, lower, upper);
2382 gtk_adjustment_set_value (adjustment, value);
2384 return (*prev_value != value);
2388 scrolled_window_deceleration_cb (GtkWidget *widdget,
2389 GdkFrameClock *frame_clock,
2392 KineticScrollData *data = user_data;
2393 GtkScrolledWindow *scrolled_window = data->scrolled_window;
2394 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2395 GtkAdjustment *hadjustment, *vadjustment;
2396 gint old_overshoot_x, old_overshoot_y, overshoot_x, overshoot_y;
2398 gint64 current_time;
2401 hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
2402 vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
2404 _gtk_scrolled_window_get_overshoot (scrolled_window,
2405 &old_overshoot_x, &old_overshoot_y);
2407 current_time = gdk_frame_clock_get_frame_time (frame_clock);
2408 elapsed = (current_time - data->last_deceleration_time) / 1000;
2409 data->last_deceleration_time = current_time;
2411 if (hadjustment && priv->hscrollbar_visible)
2413 value = priv->unclamped_hadj_value + (data->x_velocity * elapsed);
2415 if (_gtk_scrolled_window_set_adjustment_value (scrolled_window,
2418 data->x_velocity = 0;
2421 data->x_velocity = 0;
2423 if (vadjustment && priv->vscrollbar_visible)
2425 value = priv->unclamped_vadj_value + (data->y_velocity * elapsed);
2427 if (_gtk_scrolled_window_set_adjustment_value (scrolled_window,
2430 data->y_velocity = 0;
2433 data->y_velocity = 0;
2435 _gtk_scrolled_window_get_overshoot (scrolled_window,
2436 &overshoot_x, &overshoot_y);
2438 if (overshoot_x == 0)
2440 if (old_overshoot_x != 0)
2442 /* Overshooting finished snapping back */
2443 data->x_velocity = 0;
2445 else if (data->x_velocity > 0)
2447 data->x_velocity -= FRICTION_DECELERATION * elapsed * data->vel_sine;
2448 data->x_velocity = MAX (0, data->x_velocity);
2450 else if (data->x_velocity < 0)
2452 data->x_velocity += FRICTION_DECELERATION * elapsed * data->vel_sine;
2453 data->x_velocity = MIN (0, data->x_velocity);
2456 else if (overshoot_x < 0)
2457 data->x_velocity += OVERSHOOT_INVERSE_ACCELERATION * elapsed;
2458 else if (overshoot_x > 0)
2459 data->x_velocity -= OVERSHOOT_INVERSE_ACCELERATION * elapsed;
2461 if (overshoot_y == 0)
2463 if (old_overshoot_y != 0)
2465 /* Overshooting finished snapping back */
2466 data->y_velocity = 0;
2468 else if (data->y_velocity > 0)
2470 data->y_velocity -= FRICTION_DECELERATION * elapsed * data->vel_cosine;
2471 data->y_velocity = MAX (0, data->y_velocity);
2473 else if (data->y_velocity < 0)
2475 data->y_velocity += FRICTION_DECELERATION * elapsed * data->vel_cosine;
2476 data->y_velocity = MIN (0, data->y_velocity);
2479 else if (overshoot_y < 0)
2480 data->y_velocity += OVERSHOOT_INVERSE_ACCELERATION * elapsed;
2481 else if (overshoot_y > 0)
2482 data->y_velocity -= OVERSHOOT_INVERSE_ACCELERATION * elapsed;
2484 if (old_overshoot_x != overshoot_x ||
2485 old_overshoot_y != overshoot_y)
2487 if (overshoot_x >= 0 || overshoot_y >= 0)
2489 /* We need to reallocate the widget to have it at
2490 * negative offset, so there's a "gravity" on the
2491 * bottom/right corner
2493 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
2495 else if (overshoot_x < 0 || overshoot_y < 0)
2496 _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
2499 if (overshoot_x == 0 && overshoot_y == 0 &&
2500 data->x_velocity == 0 && data->y_velocity == 0)
2501 gtk_scrolled_window_cancel_deceleration (scrolled_window);
2503 return G_SOURCE_CONTINUE;
2507 gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled_window)
2509 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2511 if (priv->deceleration_id)
2513 gtk_widget_remove_tick_callback (GTK_WIDGET (scrolled_window),
2514 priv->deceleration_id);
2515 priv->deceleration_id = 0;
2520 gtk_scrolled_window_start_deceleration (GtkScrolledWindow *scrolled_window)
2522 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2523 GdkFrameClock *frame_clock;
2524 KineticScrollData *data;
2527 frame_clock = gtk_widget_get_frame_clock (GTK_WIDGET (scrolled_window));
2529 data = g_new0 (KineticScrollData, 1);
2530 data->scrolled_window = scrolled_window;
2531 data->last_deceleration_time = gdk_frame_clock_get_frame_time (frame_clock);
2532 data->x_velocity = priv->x_velocity;
2533 data->y_velocity = priv->y_velocity;
2535 /* We use sine/cosine as a factor to deceleration x/y components
2536 * of the vector, so we care about the sign later.
2538 angle = atan2 (ABS (data->x_velocity), ABS (data->y_velocity));
2539 data->vel_cosine = cos (angle);
2540 data->vel_sine = sin (angle);
2542 scrolled_window->priv->deceleration_id =
2543 gtk_widget_add_tick_callback (GTK_WIDGET (scrolled_window),
2544 scrolled_window_deceleration_cb,
2546 (GDestroyNotify) g_free);
2550 gtk_scrolled_window_release_captured_event (GtkScrolledWindow *scrolled_window)
2552 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2554 /* Cancel the scrolling and send the button press
2555 * event to the child widget
2557 if (!priv->button_press_event)
2560 if (priv->drag_device)
2562 gtk_device_grab_remove (GTK_WIDGET (scrolled_window), priv->drag_device);
2563 priv->drag_device = NULL;
2566 if (priv->capture_button_press)
2568 GtkWidget *event_widget;
2570 event_widget = gtk_get_event_widget (priv->button_press_event);
2572 if (!_gtk_propagate_captured_event (event_widget,
2573 priv->button_press_event,
2574 gtk_bin_get_child (GTK_BIN (scrolled_window))))
2575 gtk_propagate_event (event_widget, priv->button_press_event);
2577 gdk_event_free (priv->button_press_event);
2578 priv->button_press_event = NULL;
2581 if (_gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL))
2582 gtk_scrolled_window_start_deceleration (scrolled_window);
2588 gtk_scrolled_window_calculate_velocity (GtkScrolledWindow *scrolled_window,
2591 GtkScrolledWindowPrivate *priv;
2592 gdouble x_root, y_root;
2595 #define STILL_THRESHOLD 40
2597 if (!gdk_event_get_root_coords (event, &x_root, &y_root))
2600 priv = scrolled_window->priv;
2601 _time = gdk_event_get_time (event);
2603 if (priv->last_motion_event_x_root != x_root ||
2604 priv->last_motion_event_y_root != y_root ||
2605 ABS (_time - priv->last_motion_event_time) > STILL_THRESHOLD)
2607 priv->x_velocity = (priv->last_motion_event_x_root - x_root) /
2608 (gdouble) (_time - priv->last_motion_event_time);
2609 priv->y_velocity = (priv->last_motion_event_y_root - y_root) /
2610 (gdouble) (_time - priv->last_motion_event_time);
2613 priv->last_motion_event_x_root = x_root;
2614 priv->last_motion_event_y_root = y_root;
2615 priv->last_motion_event_time = _time;
2617 #undef STILL_THRESHOLD
2623 gtk_scrolled_window_captured_button_release (GtkWidget *widget,
2626 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2627 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2631 gdouble x_root, y_root;
2633 if (gdk_event_get_button (event, &button) && button != 1)
2636 child = gtk_bin_get_child (GTK_BIN (widget));
2640 gtk_device_grab_remove (widget, priv->drag_device);
2641 priv->drag_device = NULL;
2643 if (priv->release_timeout_id)
2645 g_source_remove (priv->release_timeout_id);
2646 priv->release_timeout_id = 0;
2649 overshoot = _gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL);
2652 gdk_device_ungrab (gdk_event_get_device (event), gdk_event_get_time (event));
2655 /* There hasn't been scrolling at all, so just let the
2656 * child widget handle the button press normally
2658 gtk_scrolled_window_release_captured_event (scrolled_window);
2663 priv->in_drag = FALSE;
2665 if (priv->button_press_event)
2667 gdk_event_free (priv->button_press_event);
2668 priv->button_press_event = NULL;
2671 gtk_scrolled_window_calculate_velocity (scrolled_window, event);
2673 /* Zero out vector components without a visible scrollbar */
2674 if (!priv->hscrollbar_visible)
2675 priv->x_velocity = 0;
2676 if (!priv->vscrollbar_visible)
2677 priv->y_velocity = 0;
2679 if (priv->x_velocity != 0 || priv->y_velocity != 0 || overshoot)
2681 gtk_scrolled_window_start_deceleration (scrolled_window);
2682 priv->x_velocity = priv->y_velocity = 0;
2683 priv->last_button_event_valid = FALSE;
2687 gdk_event_get_root_coords (event, &x_root, &y_root);
2688 priv->last_button_event_x_root = x_root;
2689 priv->last_button_event_y_root = y_root;
2690 priv->last_button_event_valid = TRUE;
2693 if (priv->capture_button_press)
2700 gtk_scrolled_window_captured_motion_notify (GtkWidget *widget,
2703 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2704 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2705 gint old_overshoot_x, old_overshoot_y;
2706 gint new_overshoot_x, new_overshoot_y;
2708 GtkAdjustment *hadjustment;
2709 GtkAdjustment *vadjustment;
2711 GdkModifierType state;
2712 gdouble x_root, y_root;
2714 gdk_event_get_state (event, &state);
2715 if (!(state & GDK_BUTTON1_MASK))
2718 child = gtk_bin_get_child (GTK_BIN (widget));
2722 /* Check if we've passed the drag threshold */
2723 gdk_event_get_root_coords (event, &x_root, &y_root);
2726 if (gtk_drag_check_threshold (widget,
2727 priv->last_button_event_x_root,
2728 priv->last_button_event_y_root,
2731 if (priv->release_timeout_id)
2733 g_source_remove (priv->release_timeout_id);
2734 priv->release_timeout_id = 0;
2737 priv->last_button_event_valid = FALSE;
2738 priv->in_drag = TRUE;
2744 gdk_device_grab (priv->drag_device,
2745 gtk_widget_get_window (widget),
2746 GDK_OWNERSHIP_WINDOW,
2748 GDK_BUTTON_RELEASE_MASK | GDK_BUTTON1_MOTION_MASK,
2750 gdk_event_get_time (event));
2752 priv->last_button_event_valid = FALSE;
2754 if (priv->button_press_event)
2756 gdk_event_free (priv->button_press_event);
2757 priv->button_press_event = NULL;
2760 _gtk_scrolled_window_get_overshoot (scrolled_window,
2761 &old_overshoot_x, &old_overshoot_y);
2763 hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
2764 if (hadjustment && priv->hscrollbar_visible)
2766 dx = (priv->last_motion_event_x_root - x_root) + priv->unclamped_hadj_value;
2767 _gtk_scrolled_window_set_adjustment_value (scrolled_window, hadjustment,
2771 vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
2772 if (vadjustment && priv->vscrollbar_visible)
2774 dy = (priv->last_motion_event_y_root - y_root) + priv->unclamped_vadj_value;
2775 _gtk_scrolled_window_set_adjustment_value (scrolled_window, vadjustment,
2779 _gtk_scrolled_window_get_overshoot (scrolled_window,
2780 &new_overshoot_x, &new_overshoot_y);
2782 if (old_overshoot_x != new_overshoot_x ||
2783 old_overshoot_y != new_overshoot_y)
2785 if (new_overshoot_x >= 0 || new_overshoot_y >= 0)
2787 /* We need to reallocate the widget to have it at
2788 * negative offset, so there's a "gravity" on the
2789 * bottom/right corner
2791 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
2793 else if (new_overshoot_x < 0 || new_overshoot_y < 0)
2794 _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
2797 gtk_scrolled_window_calculate_velocity (scrolled_window, event);
2803 gtk_scrolled_window_captured_button_press (GtkWidget *widget,
2806 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2807 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2809 GtkWidget *event_widget;
2810 GdkDevice *source_device;
2811 GdkInputSource source;
2812 gdouble x_root, y_root;
2815 /* If scrollbars are not visible, we don't do kinetic scrolling */
2816 if (!priv->vscrollbar_visible && !priv->hscrollbar_visible)
2819 source_device = gdk_event_get_source_device (event);
2820 source = gdk_device_get_source (source_device);
2822 if (source != GDK_SOURCE_TOUCHSCREEN)
2825 event_widget = gtk_get_event_widget (event);
2827 /* If there's another scrolled window between the widget
2828 * receiving the event and this capturing scrolled window,
2829 * let it handle the events.
2831 if (widget != gtk_widget_get_ancestor (event_widget, GTK_TYPE_SCROLLED_WINDOW))
2834 /* Check whether the button press is close to the previous one,
2835 * take that as a shortcut to get the child widget handle events
2837 gdk_event_get_root_coords (event, &x_root, &y_root);
2838 if (priv->last_button_event_valid &&
2839 ABS (x_root - priv->last_button_event_x_root) < TOUCH_BYPASS_CAPTURED_THRESHOLD &&
2840 ABS (y_root - priv->last_button_event_y_root) < TOUCH_BYPASS_CAPTURED_THRESHOLD)
2842 priv->last_button_event_valid = FALSE;
2846 priv->last_button_event_x_root = priv->last_motion_event_x_root = x_root;
2847 priv->last_button_event_y_root = priv->last_motion_event_y_root = y_root;
2848 priv->last_motion_event_time = gdk_event_get_time (event);
2849 priv->last_button_event_valid = TRUE;
2851 if (gdk_event_get_button (event, &button) && button != 1)
2854 child = gtk_bin_get_child (GTK_BIN (widget));
2858 if (priv->hscrollbar == event_widget || priv->vscrollbar == event_widget)
2861 priv->drag_device = gdk_event_get_device (event);
2862 gtk_device_grab_add (widget, priv->drag_device, TRUE);
2864 gtk_scrolled_window_cancel_deceleration (scrolled_window);
2866 /* Only set the timeout if we're going to store an event */
2867 if (priv->capture_button_press)
2868 priv->release_timeout_id =
2869 gdk_threads_add_timeout (RELEASE_EVENT_TIMEOUT,
2870 (GSourceFunc) gtk_scrolled_window_release_captured_event,
2873 priv->in_drag = FALSE;
2875 if (priv->capture_button_press)
2877 /* Store the button press event in
2878 * case we need to propagate it later
2880 priv->button_press_event = gdk_event_copy (event);
2888 gtk_scrolled_window_captured_event (GtkWidget *widget,
2891 gboolean retval = FALSE;
2892 GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW (widget)->priv;
2894 if (gdk_window_get_window_type (event->any.window) == GDK_WINDOW_TEMP)
2897 switch (event->type)
2899 case GDK_TOUCH_BEGIN:
2900 case GDK_BUTTON_PRESS:
2901 retval = gtk_scrolled_window_captured_button_press (widget, event);
2904 case GDK_BUTTON_RELEASE:
2905 if (priv->drag_device)
2906 retval = gtk_scrolled_window_captured_button_release (widget, event);
2908 priv->last_button_event_valid = FALSE;
2910 case GDK_TOUCH_UPDATE:
2911 case GDK_MOTION_NOTIFY:
2912 if (priv->drag_device)
2913 retval = gtk_scrolled_window_captured_motion_notify (widget, event);
2915 case GDK_LEAVE_NOTIFY:
2916 case GDK_ENTER_NOTIFY:
2917 if (priv->in_drag &&
2918 event->crossing.mode != GDK_CROSSING_GRAB)
2929 gtk_scrolled_window_focus (GtkWidget *widget,
2930 GtkDirectionType direction)
2932 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
2933 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
2935 gboolean had_focus_child;
2937 had_focus_child = gtk_container_get_focus_child (GTK_CONTAINER (widget)) != NULL;
2939 if (priv->focus_out)
2941 priv->focus_out = FALSE; /* Clear this to catch the wrap-around case */
2945 if (gtk_widget_is_focus (widget))
2948 /* We only put the scrolled window itself in the focus chain if it
2949 * isn't possible to focus any children.
2951 child = gtk_bin_get_child (GTK_BIN (widget));
2954 if (gtk_widget_child_focus (child, direction))
2958 if (!had_focus_child && gtk_widget_get_can_focus (widget))
2960 gtk_widget_grab_focus (widget);
2968 gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
2971 GtkScrolledWindowPrivate *priv;
2972 GtkScrolledWindow *scrolled_window;
2974 g_return_if_fail (adjustment != NULL);
2975 g_return_if_fail (data != NULL);
2977 scrolled_window = GTK_SCROLLED_WINDOW (data);
2978 priv = scrolled_window->priv;
2980 if (priv->hscrollbar &&
2981 adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
2983 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
2987 visible = priv->hscrollbar_visible;
2988 priv->hscrollbar_visible = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment) >
2989 gtk_adjustment_get_page_size (adjustment));
2991 if (priv->hscrollbar_visible != visible)
2992 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
2995 else if (priv->vscrollbar &&
2996 adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
2998 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
3002 visible = priv->vscrollbar_visible;
3003 priv->vscrollbar_visible = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment) >
3004 gtk_adjustment_get_page_size (adjustment));
3006 if (priv->vscrollbar_visible != visible)
3007 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
3013 gtk_scrolled_window_adjustment_value_changed (GtkAdjustment *adjustment,
3016 GtkScrolledWindow *scrolled_window = user_data;
3017 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
3019 /* Allow overshooting for kinetic scrolling operations */
3020 if (priv->drag_device || priv->deceleration_id)
3023 /* Ensure GtkAdjustment and unclamped values are in sync */
3024 if (priv->vscrollbar &&
3025 adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
3026 priv->unclamped_vadj_value = gtk_adjustment_get_value (adjustment);
3027 else if (priv->hscrollbar &&
3028 adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
3029 priv->unclamped_hadj_value = gtk_adjustment_get_value (adjustment);
3033 gtk_scrolled_window_add (GtkContainer *container,
3036 GtkScrolledWindowPrivate *priv;
3037 GtkScrolledWindow *scrolled_window;
3039 GtkWidget *child_widget, *scrollable_child;
3040 GtkAdjustment *hadj, *vadj;
3042 bin = GTK_BIN (container);
3043 child_widget = gtk_bin_get_child (bin);
3044 g_return_if_fail (child_widget == NULL);
3046 scrolled_window = GTK_SCROLLED_WINDOW (container);
3047 priv = scrolled_window->priv;
3049 if (GTK_IS_SCROLLABLE (child))
3051 scrollable_child = child;
3055 scrollable_child = gtk_viewport_new (NULL, NULL);
3056 gtk_widget_show (scrollable_child);
3057 gtk_container_add (GTK_CONTAINER (scrollable_child), child);
3060 if (gtk_widget_get_realized (GTK_WIDGET (bin)))
3061 gtk_widget_set_parent_window (scrollable_child, priv->overshoot_window);
3063 _gtk_bin_set_child (bin, scrollable_child);
3064 gtk_widget_set_parent (scrollable_child, GTK_WIDGET (bin));
3066 hadj = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
3067 vadj = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
3069 g_object_set (scrollable_child, "hadjustment", hadj, "vadjustment", vadj, NULL);
3073 gtk_scrolled_window_remove (GtkContainer *container,
3076 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
3077 g_return_if_fail (child != NULL);
3078 g_return_if_fail (gtk_bin_get_child (GTK_BIN (container)) == child);
3080 g_object_set (child, "hadjustment", NULL, "vadjustment", NULL, NULL);
3082 /* chain parent class handler to remove child */
3083 GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->remove (container, child);
3087 * gtk_scrolled_window_add_with_viewport:
3088 * @scrolled_window: a #GtkScrolledWindow
3089 * @child: the widget you want to scroll
3091 * Used to add children without native scrolling capabilities. This
3092 * is simply a convenience function; it is equivalent to adding the
3093 * unscrollable child to a viewport, then adding the viewport to the
3094 * scrolled window. If a child has native scrolling, use
3095 * gtk_container_add() instead of this function.
3097 * The viewport scrolls the child by moving its #GdkWindow, and takes
3098 * the size of the child to be the size of its toplevel #GdkWindow.
3099 * This will be very wrong for most widgets that support native scrolling;
3100 * for example, if you add a widget such as #GtkTreeView with a viewport,
3101 * the whole widget will scroll, including the column headings. Thus,
3102 * widgets with native scrolling support should not be used with the
3103 * #GtkViewport proxy.
3105 * A widget supports scrolling natively if it implements the
3106 * #GtkScrollable interface.
3108 * Deprecated: 3.8: gtk_container_add() will now automatically add
3109 * a #GtkViewport if the child doesn't implement #GtkScrollable.
3112 gtk_scrolled_window_add_with_viewport (GtkScrolledWindow *scrolled_window,
3116 GtkWidget *viewport;
3117 GtkWidget *child_widget;
3119 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
3120 g_return_if_fail (GTK_IS_WIDGET (child));
3121 g_return_if_fail (gtk_widget_get_parent (child) == NULL);
3123 bin = GTK_BIN (scrolled_window);
3124 child_widget = gtk_bin_get_child (bin);
3128 g_return_if_fail (GTK_IS_VIEWPORT (child_widget));
3129 g_return_if_fail (gtk_bin_get_child (GTK_BIN (child_widget)) == NULL);
3131 viewport = child_widget;
3136 gtk_viewport_new (gtk_scrolled_window_get_hadjustment (scrolled_window),
3137 gtk_scrolled_window_get_vadjustment (scrolled_window));
3138 gtk_container_add (GTK_CONTAINER (scrolled_window), viewport);
3141 gtk_widget_show (viewport);
3142 gtk_container_add (GTK_CONTAINER (viewport), child);
3146 * _gtk_scrolled_window_get_spacing:
3147 * @scrolled_window: a scrolled window
3149 * Gets the spacing between the scrolled window's scrollbars and
3150 * the scrolled widget. Used by GtkCombo
3152 * Return value: the spacing, in pixels.
3155 _gtk_scrolled_window_get_scrollbar_spacing (GtkScrolledWindow *scrolled_window)
3157 GtkScrolledWindowClass *class;
3159 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
3161 class = GTK_SCROLLED_WINDOW_GET_CLASS (scrolled_window);
3163 if (class->scrollbar_spacing >= 0)
3164 return class->scrollbar_spacing;
3167 gint scrollbar_spacing;
3169 gtk_widget_style_get (GTK_WIDGET (scrolled_window),
3170 "scrollbar-spacing", &scrollbar_spacing,
3173 return scrollbar_spacing;
3179 gtk_scrolled_window_get_preferred_size (GtkWidget *widget,
3180 GtkOrientation orientation,
3184 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3185 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
3186 GtkBin *bin = GTK_BIN (scrolled_window);
3189 gint scrollbar_spacing;
3190 GtkRequisition hscrollbar_requisition;
3191 GtkRequisition vscrollbar_requisition;
3192 GtkRequisition minimum_req, natural_req;
3194 gint min_child_size, nat_child_size;
3196 scrollbar_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
3200 minimum_req.width = 0;
3201 minimum_req.height = 0;
3202 natural_req.width = 0;
3203 natural_req.height = 0;
3205 gtk_widget_get_preferred_size (priv->hscrollbar,
3206 &hscrollbar_requisition, NULL);
3207 gtk_widget_get_preferred_size (priv->vscrollbar,
3208 &vscrollbar_requisition, NULL);
3210 child = gtk_bin_get_child (bin);
3211 if (child && gtk_widget_get_visible (child))
3213 if (orientation == GTK_ORIENTATION_HORIZONTAL)
3215 gtk_widget_get_preferred_width (child,
3219 if (priv->hscrollbar_policy == GTK_POLICY_NEVER)
3221 minimum_req.width += min_child_size;
3222 natural_req.width += nat_child_size;
3226 gint min_content_width = priv->min_content_width;
3228 if (min_content_width >= 0)
3230 minimum_req.width = MAX (minimum_req.width, min_content_width);
3231 natural_req.width = MAX (natural_req.width, min_content_width);
3236 minimum_req.width += vscrollbar_requisition.width;
3237 natural_req.width += vscrollbar_requisition.width;
3241 else /* GTK_ORIENTATION_VERTICAL */
3243 gtk_widget_get_preferred_height (child,
3247 if (priv->vscrollbar_policy == GTK_POLICY_NEVER)
3249 minimum_req.height += min_child_size;
3250 natural_req.height += nat_child_size;
3254 gint min_content_height = priv->min_content_height;
3256 if (min_content_height >= 0)
3258 minimum_req.height = MAX (minimum_req.height, min_content_height);
3259 natural_req.height = MAX (natural_req.height, min_content_height);
3264 minimum_req.height += vscrollbar_requisition.height;
3265 natural_req.height += vscrollbar_requisition.height;
3271 if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC ||
3272 priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
3274 minimum_req.width = MAX (minimum_req.width, hscrollbar_requisition.width);
3275 natural_req.width = MAX (natural_req.width, hscrollbar_requisition.width);
3276 if (!extra_height || priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
3277 extra_height = scrollbar_spacing + hscrollbar_requisition.height;
3280 if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC ||
3281 priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
3283 minimum_req.height = MAX (minimum_req.height, vscrollbar_requisition.height);
3284 natural_req.height = MAX (natural_req.height, vscrollbar_requisition.height);
3285 if (!extra_width || priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
3286 extra_width = scrollbar_spacing + vscrollbar_requisition.width;
3289 minimum_req.width += MAX (0, extra_width);
3290 minimum_req.height += MAX (0, extra_height);
3291 natural_req.width += MAX (0, extra_width);
3292 natural_req.height += MAX (0, extra_height);
3294 if (priv->shadow_type != GTK_SHADOW_NONE)
3296 GtkStyleContext *context;
3297 GtkStateFlags state;
3298 GtkBorder padding, border;
3300 context = gtk_widget_get_style_context (GTK_WIDGET (widget));
3301 state = gtk_widget_get_state_flags (GTK_WIDGET (widget));
3303 gtk_style_context_save (context);
3304 gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
3306 gtk_style_context_get_padding (context, state, &padding);
3307 gtk_style_context_get_border (context, state, &border);
3309 minimum_req.width += padding.left + padding.right + border.left + border.right;
3310 minimum_req.height += padding.top + padding.bottom + border.top + border.bottom;
3311 natural_req.width += padding.left + padding.right + border.left + border.right;
3312 natural_req.height += padding.top + padding.bottom + border.top + border.bottom;
3314 gtk_style_context_restore (context);
3317 if (orientation == GTK_ORIENTATION_HORIZONTAL)
3320 *minimum_size = minimum_req.width;
3322 *natural_size = natural_req.width;
3327 *minimum_size = minimum_req.height;
3329 *natural_size = natural_req.height;
3334 gtk_scrolled_window_get_preferred_width (GtkWidget *widget,
3338 gtk_scrolled_window_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
3342 gtk_scrolled_window_get_preferred_height (GtkWidget *widget,
3346 gtk_scrolled_window_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
3350 gtk_scrolled_window_get_preferred_height_for_width (GtkWidget *widget,
3352 gint *minimum_height,
3353 gint *natural_height)
3355 g_return_if_fail (GTK_IS_WIDGET (widget));
3357 GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, minimum_height, natural_height);
3361 gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *widget,
3363 gint *minimum_width,
3364 gint *natural_width)
3366 g_return_if_fail (GTK_IS_WIDGET (widget));
3368 GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
3372 gtk_scrolled_window_realize (GtkWidget *widget)
3374 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3375 GtkAllocation allocation, relative_allocation;
3376 GdkWindowAttr attributes;
3377 GtkWidget *child_widget;
3378 gint attributes_mask;
3380 gtk_widget_set_realized (widget, TRUE);
3381 gtk_widget_get_allocation (widget, &allocation);
3382 gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
3384 attributes.window_type = GDK_WINDOW_CHILD;
3385 attributes.x = allocation.x + relative_allocation.x;
3386 attributes.y = allocation.y + relative_allocation.y;
3387 attributes.width = allocation.width;
3388 attributes.height = allocation.height;
3389 attributes.wclass = GDK_INPUT_OUTPUT;
3390 attributes.visual = gtk_widget_get_visual (widget);
3391 attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK |
3392 GDK_BUTTON_MOTION_MASK | GDK_TOUCH_MASK | GDK_EXPOSURE_MASK;
3394 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
3396 scrolled_window->priv->overshoot_window =
3397 gdk_window_new (gtk_widget_get_parent_window (widget),
3398 &attributes, attributes_mask);
3399 gtk_widget_register_window (widget, scrolled_window->priv->overshoot_window);
3401 child_widget = gtk_bin_get_child (GTK_BIN (widget));
3404 gtk_widget_set_parent_window (child_widget,
3405 scrolled_window->priv->overshoot_window);
3407 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->realize (widget);
3411 gtk_scrolled_window_unrealize (GtkWidget *widget)
3413 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3415 gtk_widget_unregister_window (widget, scrolled_window->priv->overshoot_window);
3416 gdk_window_destroy (scrolled_window->priv->overshoot_window);
3417 scrolled_window->priv->overshoot_window = NULL;
3419 gtk_widget_set_realized (widget, FALSE);
3421 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->unrealize (widget);
3425 gtk_scrolled_window_map (GtkWidget *widget)
3427 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3429 gdk_window_show (scrolled_window->priv->overshoot_window);
3431 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->map (widget);
3435 gtk_scrolled_window_unmap (GtkWidget *widget)
3437 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3439 gdk_window_hide (scrolled_window->priv->overshoot_window);
3441 GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->unmap (widget);
3445 gtk_scrolled_window_grab_notify (GtkWidget *widget,
3446 gboolean was_grabbed)
3448 GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
3449 GtkScrolledWindowPrivate *priv = scrolled_window->priv;
3451 if (priv->drag_device &&
3452 gtk_widget_device_is_shadowed (widget,
3455 gdk_device_ungrab (priv->drag_device,
3456 gtk_get_current_event_time ());
3457 priv->drag_device = NULL;
3458 priv->in_drag = FALSE;
3460 if (priv->release_timeout_id)
3462 g_source_remove (priv->release_timeout_id);
3463 priv->release_timeout_id = 0;
3466 if (_gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL))
3467 gtk_scrolled_window_start_deceleration (scrolled_window);
3469 gtk_scrolled_window_cancel_deceleration (scrolled_window);
3471 priv->last_button_event_valid = FALSE;
3476 * gtk_scrolled_window_get_min_content_width:
3477 * @scrolled_window: a #GtkScrolledWindow
3479 * Gets the minimum content width of @scrolled_window, or -1 if not set.
3481 * Returns: the minimum content width
3486 gtk_scrolled_window_get_min_content_width (GtkScrolledWindow *scrolled_window)
3488 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
3490 return scrolled_window->priv->min_content_width;
3494 * gtk_scrolled_window_set_min_content_width:
3495 * @scrolled_window: a #GtkScrolledWindow
3496 * @width: the minimal content width
3498 * Sets the minimum width that @scrolled_window should keep visible.
3499 * Note that this can and (usually will) be smaller than the minimum
3500 * size of the content.
3505 gtk_scrolled_window_set_min_content_width (GtkScrolledWindow *scrolled_window,
3508 GtkScrolledWindowPrivate *priv;
3510 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
3512 priv = scrolled_window->priv;
3514 if (priv->min_content_width != width)
3516 priv->min_content_width = width;
3518 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
3520 g_object_notify (G_OBJECT (scrolled_window), "min-content-width");
3525 * gtk_scrolled_window_get_min_content_height:
3526 * @scrolled_window: a #GtkScrolledWindow
3528 * Gets the minimal content height of @scrolled_window, or -1 if not set.
3530 * Returns: the minimal content height
3535 gtk_scrolled_window_get_min_content_height (GtkScrolledWindow *scrolled_window)
3537 g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
3539 return scrolled_window->priv->min_content_height;
3543 * gtk_scrolled_window_set_min_content_height:
3544 * @scrolled_window: a #GtkScrolledWindow
3545 * @height: the minimal content height
3547 * Sets the minimum height that @scrolled_window should keep visible.
3548 * Note that this can and (usually will) be smaller than the minimum
3549 * size of the content.
3554 gtk_scrolled_window_set_min_content_height (GtkScrolledWindow *scrolled_window,
3557 GtkScrolledWindowPrivate *priv;
3559 g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
3561 priv = scrolled_window->priv;
3563 if (priv->min_content_height != height)
3565 priv->min_content_height = height;
3567 gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
3569 g_object_notify (G_OBJECT (scrolled_window), "min-content-height");