* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
+
+/*
+ * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GTK+ Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ */
+
+#include "config.h"
+
#include "gtkscrolledwindow.h"
-#include "gtksignal.h"
+#include "gtkadjustment.h"
+#include "gtkbindings.h"
+#include "gtkdnd.h"
+#include "gtkintl.h"
+#include "gtkmain.h"
+#include "gtkmarshalers.h"
+#include "gtkprivate.h"
+#include "gtkscrollable.h"
+#include "gtkscrollbar.h"
+#include "gtktypebuiltins.h"
+#include "gtkviewport.h"
+#include "gtkwidgetprivate.h"
+#include "gtkwindow.h"
+#include "a11y/gtkscrolledwindowaccessible.h"
+
+#include <math.h>
+
+/**
+ * SECTION:gtkscrolledwindow
+ * @Short_description: Adds scrollbars to its child widget
+ * @Title: GtkScrolledWindow
+ * @See_also: #GtkScrollable, #GtkViewport, #GtkAdjustment
+ *
+ * #GtkScrolledWindow is a #GtkBin subclass: it's a container
+ * the accepts a single child widget. #GtkScrolledWindow adds scrollbars
+ * to the child widget and optionally draws a beveled frame around the
+ * child widget.
+ *
+ * The scrolled window can work in two ways. Some widgets have native
+ * scrolling support; these widgets implement the #GtkScrollable interface.
+ * Widgets with native scroll support include #GtkTreeView, #GtkTextView,
+ * and #GtkLayout.
+ *
+ * For widgets that lack native scrolling support, the #GtkViewport
+ * widget acts as an adaptor class, implementing scrollability for child
+ * widgets that lack their own scrolling capabilities. Use #GtkViewport
+ * to scroll child widgets such as #GtkGrid, #GtkBox, and so on.
+ *
+ * If a widget has native scrolling abilities, it can be added to the
+ * #GtkScrolledWindow with gtk_container_add(). If a widget does not, you
+ * must first add the widget to a #GtkViewport, then add the #GtkViewport
+ * to the scrolled window. gtk_container_add() will do this for you for
+ * widgets that don't implement #GtkScrollable natively, so you can
+ * ignore the presence of the viewport.
+ *
+ * The position of the scrollbars is controlled by the scroll
+ * adjustments. See #GtkAdjustment for the fields in an adjustment - for
+ * #GtkScrollbar, used by #GtkScrolledWindow, the "value" field
+ * represents the position of the scrollbar, which must be between the
+ * "lower" field and "upper - page_size." The "page_size" field
+ * represents the size of the visible scrollable area. The
+ * "step_increment" and "page_increment" fields are used when the user
+ * asks to step down (using the small stepper arrows) or page down (using
+ * for example the PageDown key).
+ *
+ * If a #GtkScrolledWindow doesn't behave quite as you would like, or
+ * doesn't have exactly the right layout, it's very possible to set up
+ * your own scrolling with #GtkScrollbar and for example a #GtkGrid.
+ */
-#define SCROLLBAR_SPACING(w) (GTK_SCROLLED_WINDOW_CLASS (GTK_OBJECT (w)->klass)->scrollbar_spacing)
-enum {
- ARG_0,
- ARG_HADJUSTMENT,
- ARG_VADJUSTMENT,
- ARG_HSCROLLBAR_POLICY,
- ARG_VSCROLLBAR_POLICY,
- ARG_WINDOW_PLACEMENT
-};
+/* scrolled window policy and size requisition handling:
+ *
+ * gtk size requisition works as follows:
+ * a widget upon size-request reports the width and height that it finds
+ * to be best suited to display its contents, including children.
+ * the width and/or height reported from a widget upon size requisition
+ * may be overidden by the user by specifying a width and/or height
+ * other than 0 through gtk_widget_set_size_request().
+ *
+ * a scrolled window needs (for implementing all three policy types) to
+ * request its width and height based on two different rationales.
+ * 1) the user wants the scrolled window to just fit into the space
+ * that it gets allocated for a specifc dimension.
+ * 1.1) this does not apply if the user specified a concrete value
+ * value for that specific dimension by either specifying usize for the
+ * scrolled window or for its child.
+ * 2) the user wants the scrolled window to take as much space up as
+ * is desired by the child for a specifc dimension (i.e. POLICY_NEVER).
+ *
+ * also, kinda obvious:
+ * 3) a user would certainly not have choosen a scrolled window as a container
+ * for the child, if the resulting allocation takes up more space than the
+ * child would have allocated without the scrolled window.
+ *
+ * conclusions:
+ * A) from 1) follows: the scrolled window shouldn't request more space for a
+ * specifc dimension than is required at minimum.
+ * B) from 1.1) follows: the requisition may be overidden by usize of the scrolled
+ * window (done automatically) or by usize of the child (needs to be checked).
+ * C) from 2) follows: for POLICY_NEVER, the scrolled window simply reports the
+ * child's dimension.
+ * D) from 3) follows: the scrolled window child's minimum width and minimum height
+ * under A) at least correspond to the space taken up by its scrollbars.
+ */
+#define DEFAULT_SCROLLBAR_SPACING 3
+#define TOUCH_BYPASS_CAPTURED_THRESHOLD 30
-static void gtk_scrolled_window_class_init (GtkScrolledWindowClass *klass);
-static void gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window);
-static void gtk_scrolled_window_set_arg (GtkObject *object,
- GtkArg *arg,
- guint arg_id);
-static void gtk_scrolled_window_get_arg (GtkObject *object,
- GtkArg *arg,
- guint arg_id);
-static void gtk_scrolled_window_destroy (GtkObject *object);
-static void gtk_scrolled_window_finalize (GtkObject *object);
-static void gtk_scrolled_window_map (GtkWidget *widget);
-static void gtk_scrolled_window_unmap (GtkWidget *widget);
-static void gtk_scrolled_window_draw (GtkWidget *widget,
- GdkRectangle *area);
-static void gtk_scrolled_window_size_request (GtkWidget *widget,
- GtkRequisition *requisition);
-static void gtk_scrolled_window_size_allocate (GtkWidget *widget,
- GtkAllocation *allocation);
-static void gtk_scrolled_window_add (GtkContainer *container,
- GtkWidget *widget);
-static void gtk_scrolled_window_remove (GtkContainer *container,
- GtkWidget *widget);
-static void gtk_scrolled_window_forall (GtkContainer *container,
- gboolean include_internals,
- GtkCallback callback,
- gpointer callback_data);
-static void gtk_scrolled_window_relative_allocation(GtkWidget *widget,
- GtkAllocation *allocation);
-static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
- gpointer data);
+/* Kinetic scrolling */
+#define MAX_OVERSHOOT_DISTANCE 50
+#define FRICTION_DECELERATION 0.003
+#define OVERSHOOT_INVERSE_ACCELERATION 0.003
+#define RELEASE_EVENT_TIMEOUT 1000
+
+struct _GtkScrolledWindowPrivate
+{
+ GtkWidget *hscrollbar;
+ GtkWidget *vscrollbar;
+
+ GtkCornerType real_window_placement;
+ guint16 shadow_type;
+
+ guint window_placement_set : 1;
+ guint hscrollbar_policy : 2;
+ guint vscrollbar_policy : 2;
+ guint hscrollbar_visible : 1;
+ guint vscrollbar_visible : 1;
+ guint window_placement : 2;
+ guint focus_out : 1; /* Flag used by ::move-focus-out implementation */
+
+ gint min_content_width;
+ gint min_content_height;
+
+ /* Kinetic scrolling */
+ GdkEvent *button_press_event;
+ GdkWindow *overshoot_window;
+ GdkDevice *drag_device;
+ guint kinetic_scrolling : 1;
+ guint capture_button_press : 1;
+ guint in_drag : 1;
+ guint last_button_event_valid : 1;
+
+ guint release_timeout_id;
+ guint deceleration_id;
+
+ gdouble last_button_event_x_root;
+ gdouble last_button_event_y_root;
+
+ gdouble last_motion_event_x_root;
+ gdouble last_motion_event_y_root;
+ guint32 last_motion_event_time;
+
+ gdouble x_velocity;
+ gdouble y_velocity;
+
+ gdouble unclamped_hadj_value;
+ gdouble unclamped_vadj_value;
+};
+typedef struct
+{
+ GtkScrolledWindow *scrolled_window;
+ gint64 last_deceleration_time;
-static GtkContainerClass *parent_class = NULL;
+ gdouble x_velocity;
+ gdouble y_velocity;
+ gdouble vel_cosine;
+ gdouble vel_sine;
+} KineticScrollData;
+enum {
+ PROP_0,
+ PROP_HADJUSTMENT,
+ PROP_VADJUSTMENT,
+ PROP_HSCROLLBAR_POLICY,
+ PROP_VSCROLLBAR_POLICY,
+ PROP_WINDOW_PLACEMENT,
+ PROP_WINDOW_PLACEMENT_SET,
+ PROP_SHADOW_TYPE,
+ PROP_MIN_CONTENT_WIDTH,
+ PROP_MIN_CONTENT_HEIGHT,
+ PROP_KINETIC_SCROLLING
+};
-GtkType
-gtk_scrolled_window_get_type (void)
+/* Signals */
+enum
{
- static GtkType scrolled_window_type = 0;
+ SCROLL_CHILD,
+ MOVE_FOCUS_OUT,
+ LAST_SIGNAL
+};
- if (!scrolled_window_type)
- {
- static const GtkTypeInfo scrolled_window_info =
- {
- "GtkScrolledWindow",
- sizeof (GtkScrolledWindow),
- sizeof (GtkScrolledWindowClass),
- (GtkClassInitFunc) gtk_scrolled_window_class_init,
- (GtkObjectInitFunc) gtk_scrolled_window_init,
- /* reserved_1 */ NULL,
- /* reserved_2 */ NULL,
- (GtkClassInitFunc) NULL,
- };
+static void gtk_scrolled_window_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gtk_scrolled_window_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static void gtk_scrolled_window_destroy (GtkWidget *widget);
+static void gtk_scrolled_window_screen_changed (GtkWidget *widget,
+ GdkScreen *previous_screen);
+static gboolean gtk_scrolled_window_draw (GtkWidget *widget,
+ cairo_t *cr);
+static void gtk_scrolled_window_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation);
+static gboolean gtk_scrolled_window_scroll_event (GtkWidget *widget,
+ GdkEventScroll *event);
+static gboolean gtk_scrolled_window_captured_event (GtkWidget *widget,
+ GdkEvent *event);
+static gboolean gtk_scrolled_window_focus (GtkWidget *widget,
+ GtkDirectionType direction);
+static void gtk_scrolled_window_add (GtkContainer *container,
+ GtkWidget *widget);
+static void gtk_scrolled_window_remove (GtkContainer *container,
+ GtkWidget *widget);
+static void gtk_scrolled_window_forall (GtkContainer *container,
+ gboolean include_internals,
+ GtkCallback callback,
+ gpointer callback_data);
+static gboolean gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window,
+ GtkScrollType scroll,
+ gboolean horizontal);
+static void gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window,
+ GtkDirectionType direction_type);
+
+static void gtk_scrolled_window_relative_allocation(GtkWidget *widget,
+ GtkAllocation *allocation);
+static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
+ gpointer data);
+static void gtk_scrolled_window_adjustment_value_changed (GtkAdjustment *adjustment,
+ gpointer data);
+
+static void gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window);
+
+static void gtk_scrolled_window_get_preferred_width (GtkWidget *widget,
+ gint *minimum_size,
+ gint *natural_size);
+static void gtk_scrolled_window_get_preferred_height (GtkWidget *widget,
+ gint *minimum_size,
+ gint *natural_size);
+static void gtk_scrolled_window_get_preferred_height_for_width (GtkWidget *layout,
+ gint width,
+ gint *minimum_height,
+ gint *natural_height);
+static void gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *layout,
+ gint width,
+ gint *minimum_height,
+ gint *natural_height);
+
+static void gtk_scrolled_window_realize (GtkWidget *widget);
+static void gtk_scrolled_window_unrealize (GtkWidget *widget);
+static void gtk_scrolled_window_map (GtkWidget *widget);
+static void gtk_scrolled_window_unmap (GtkWidget *widget);
+
+static void gtk_scrolled_window_grab_notify (GtkWidget *widget,
+ gboolean was_grabbed);
+
+static gboolean _gtk_scrolled_window_set_adjustment_value (GtkScrolledWindow *scrolled_window,
+ GtkAdjustment *adjustment,
+ gdouble value,
+ gboolean allow_overshooting,
+ gboolean snap_to_border);
+
+static void gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled_window);
+
+static guint signals[LAST_SIGNAL] = {0};
+
+G_DEFINE_TYPE (GtkScrolledWindow, gtk_scrolled_window, GTK_TYPE_BIN)
- scrolled_window_type = gtk_type_unique (GTK_TYPE_BIN, &scrolled_window_info);
- }
- return scrolled_window_type;
+static void
+add_scroll_binding (GtkBindingSet *binding_set,
+ guint keyval,
+ GdkModifierType mask,
+ GtkScrollType scroll,
+ gboolean horizontal)
+{
+ guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
+
+ gtk_binding_entry_add_signal (binding_set, keyval, mask,
+ "scroll-child", 2,
+ GTK_TYPE_SCROLL_TYPE, scroll,
+ G_TYPE_BOOLEAN, horizontal);
+ gtk_binding_entry_add_signal (binding_set, keypad_keyval, mask,
+ "scroll-child", 2,
+ GTK_TYPE_SCROLL_TYPE, scroll,
+ G_TYPE_BOOLEAN, horizontal);
+}
+
+static void
+add_tab_bindings (GtkBindingSet *binding_set,
+ GdkModifierType modifiers,
+ GtkDirectionType direction)
+{
+ gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, modifiers,
+ "move-focus-out", 1,
+ GTK_TYPE_DIRECTION_TYPE, direction);
+ gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, modifiers,
+ "move-focus-out", 1,
+ GTK_TYPE_DIRECTION_TYPE, direction);
}
static void
gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
{
- GtkObjectClass *object_class;
+ GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
+ GtkBindingSet *binding_set;
- object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
container_class = (GtkContainerClass*) class;
- parent_class = gtk_type_class (GTK_TYPE_BIN);
-
- gtk_object_add_arg_type ("GtkScrolledWindow::hadjustment",
- GTK_TYPE_ADJUSTMENT,
- GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
- ARG_HADJUSTMENT);
- gtk_object_add_arg_type ("GtkScrolledWindow::vadjustment",
- GTK_TYPE_ADJUSTMENT,
- GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
- ARG_VADJUSTMENT);
- gtk_object_add_arg_type ("GtkScrolledWindow::hscrollbar_policy",
- GTK_TYPE_POLICY_TYPE,
- GTK_ARG_READWRITE,
- ARG_HSCROLLBAR_POLICY);
- gtk_object_add_arg_type ("GtkScrolledWindow::vscrollbar_policy",
- GTK_TYPE_POLICY_TYPE,
- GTK_ARG_READWRITE,
- ARG_VSCROLLBAR_POLICY);
- gtk_object_add_arg_type ("GtkScrolledWindow::window_placement",
- GTK_TYPE_CORNER_TYPE,
- GTK_ARG_READWRITE,
- ARG_WINDOW_PLACEMENT);
-
- object_class->set_arg = gtk_scrolled_window_set_arg;
- object_class->get_arg = gtk_scrolled_window_get_arg;
- object_class->destroy = gtk_scrolled_window_destroy;
- object_class->finalize = gtk_scrolled_window_finalize;
- widget_class->map = gtk_scrolled_window_map;
- widget_class->unmap = gtk_scrolled_window_unmap;
+ gobject_class->set_property = gtk_scrolled_window_set_property;
+ gobject_class->get_property = gtk_scrolled_window_get_property;
+
+ widget_class->destroy = gtk_scrolled_window_destroy;
+ widget_class->screen_changed = gtk_scrolled_window_screen_changed;
widget_class->draw = gtk_scrolled_window_draw;
- widget_class->size_request = gtk_scrolled_window_size_request;
widget_class->size_allocate = gtk_scrolled_window_size_allocate;
+ widget_class->scroll_event = gtk_scrolled_window_scroll_event;
+ widget_class->focus = gtk_scrolled_window_focus;
+ widget_class->get_preferred_width = gtk_scrolled_window_get_preferred_width;
+ widget_class->get_preferred_height = gtk_scrolled_window_get_preferred_height;
+ widget_class->get_preferred_height_for_width = gtk_scrolled_window_get_preferred_height_for_width;
+ widget_class->get_preferred_width_for_height = gtk_scrolled_window_get_preferred_width_for_height;
+ widget_class->realize = gtk_scrolled_window_realize;
+ widget_class->unrealize = gtk_scrolled_window_unrealize;
+ widget_class->map = gtk_scrolled_window_map;
+ widget_class->unmap = gtk_scrolled_window_unmap;
+ widget_class->grab_notify = gtk_scrolled_window_grab_notify;
container_class->add = gtk_scrolled_window_add;
container_class->remove = gtk_scrolled_window_remove;
container_class->forall = gtk_scrolled_window_forall;
+ gtk_container_class_handle_border_width (container_class);
- class->scrollbar_spacing = 5;
-}
+ class->scrollbar_spacing = -1;
-static void
-gtk_scrolled_window_set_arg (GtkObject *object,
- GtkArg *arg,
- guint arg_id)
-{
- GtkScrolledWindow *scrolled_window;
+ class->scroll_child = gtk_scrolled_window_scroll_child;
+ class->move_focus_out = gtk_scrolled_window_move_focus_out;
+
+ g_object_class_install_property (gobject_class,
+ PROP_HADJUSTMENT,
+ g_param_spec_object ("hadjustment",
+ P_("Horizontal Adjustment"),
+ P_("The GtkAdjustment for the horizontal position"),
+ GTK_TYPE_ADJUSTMENT,
+ GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
+ g_object_class_install_property (gobject_class,
+ PROP_VADJUSTMENT,
+ g_param_spec_object ("vadjustment",
+ P_("Vertical Adjustment"),
+ P_("The GtkAdjustment for the vertical position"),
+ GTK_TYPE_ADJUSTMENT,
+ GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
+ g_object_class_install_property (gobject_class,
+ PROP_HSCROLLBAR_POLICY,
+ g_param_spec_enum ("hscrollbar-policy",
+ P_("Horizontal Scrollbar Policy"),
+ P_("When the horizontal scrollbar is displayed"),
+ GTK_TYPE_POLICY_TYPE,
+ GTK_POLICY_AUTOMATIC,
+ GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
+ g_object_class_install_property (gobject_class,
+ PROP_VSCROLLBAR_POLICY,
+ g_param_spec_enum ("vscrollbar-policy",
+ P_("Vertical Scrollbar Policy"),
+ P_("When the vertical scrollbar is displayed"),
+ GTK_TYPE_POLICY_TYPE,
+ GTK_POLICY_AUTOMATIC,
+ GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
+
+ g_object_class_install_property (gobject_class,
+ PROP_WINDOW_PLACEMENT,
+ g_param_spec_enum ("window-placement",
+ P_("Window Placement"),
+ P_("Where the contents are located with respect to the scrollbars. This property only takes effect if \"window-placement-set\" is TRUE."),
+ GTK_TYPE_CORNER_TYPE,
+ GTK_CORNER_TOP_LEFT,
+ GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
+
+ /**
+ * GtkScrolledWindow:window-placement-set:
+ *
+ * Whether "window-placement" should be used to determine the location
+ * of the contents with respect to the scrollbars. Otherwise, the
+ * "gtk-scrolled-window-placement" setting is used.
+ *
+ * Since: 2.10
+ */
+ g_object_class_install_property (gobject_class,
+ PROP_WINDOW_PLACEMENT_SET,
+ g_param_spec_boolean ("window-placement-set",
+ P_("Window Placement Set"),
+ P_("Whether \"window-placement\" should be used to determine the location of the contents with respect to the scrollbars."),
+ FALSE,
+ GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
+ g_object_class_install_property (gobject_class,
+ PROP_SHADOW_TYPE,
+ g_param_spec_enum ("shadow-type",
+ P_("Shadow Type"),
+ P_("Style of bevel around the contents"),
+ GTK_TYPE_SHADOW_TYPE,
+ GTK_SHADOW_NONE,
+ GTK_PARAM_READABLE | GTK_PARAM_WRITABLE));
+
+ /**
+ * GtkScrolledWindow:scrollbars-within-bevel:
+ *
+ * Whether to place scrollbars within the scrolled window's bevel.
+ *
+ * Since: 2.12
+ */
+ gtk_widget_class_install_style_property (widget_class,
+ g_param_spec_boolean ("scrollbars-within-bevel",
+ P_("Scrollbars within bevel"),
+ P_("Place scrollbars within the scrolled window's bevel"),
+ FALSE,
+ GTK_PARAM_READABLE));
+
+ gtk_widget_class_install_style_property (widget_class,
+ g_param_spec_int ("scrollbar-spacing",
+ P_("Scrollbar spacing"),
+ P_("Number of pixels between the scrollbars and the scrolled window"),
+ 0,
+ G_MAXINT,
+ DEFAULT_SCROLLBAR_SPACING,
+ GTK_PARAM_READABLE));
+
+ /**
+ * GtkScrolledWindow:min-content-width:
+ *
+ * The minimum content width of @scrolled_window, or -1 if not set.
+ *
+ * Since: 3.0
+ */
+ g_object_class_install_property (gobject_class,
+ PROP_MIN_CONTENT_WIDTH,
+ g_param_spec_int ("min-content-width",
+ P_("Minimum Content Width"),
+ P_("The minimum width that the scrolled window will allocate to its content"),
+ -1, G_MAXINT, -1,
+ GTK_PARAM_READWRITE));
+
+ /**
+ * GtkScrolledWindow:min-content-height:
+ *
+ * The minimum content height of @scrolled_window, or -1 if not set.
+ *
+ * Since: 3.0
+ */
+ g_object_class_install_property (gobject_class,
+ PROP_MIN_CONTENT_HEIGHT,
+ g_param_spec_int ("min-content-height",
+ P_("Minimum Content Height"),
+ P_("The minimum height that the scrolled window will allocate to its content"),
+ -1, G_MAXINT, -1,
+ GTK_PARAM_READWRITE));
+
+ /**
+ * GtkScrolledWindow:kinetic-scrolling:
+ *
+ * The kinetic scrolling behavior flags. Kinetic scrolling
+ * only applies to devices with source %GDK_SOURCE_TOUCHSCREEN
+ *
+ * Since: 3.4
+ */
+ g_object_class_install_property (gobject_class,
+ PROP_KINETIC_SCROLLING,
+ g_param_spec_boolean ("kinetic-scrolling",
+ P_("Kinetic Scrolling"),
+ P_("Kinetic scrolling mode."),
+ TRUE,
+ GTK_PARAM_READABLE |
+ GTK_PARAM_WRITABLE));
+ /**
+ * GtkScrolledWindow::scroll-child:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @scroll: a #GtkScrollType describing how much to scroll
+ * @horizontal: whether the keybinding scrolls the child
+ * horizontally or not
+ *
+ * The ::scroll-child signal is a
+ * <link linkend="keybinding-signals">keybinding signal</link>
+ * which gets emitted when a keybinding that scrolls is pressed.
+ * The horizontal or vertical adjustment is updated which triggers a
+ * signal that the scrolled windows child may listen to and scroll itself.
+ */
+ signals[SCROLL_CHILD] =
+ g_signal_new (I_("scroll-child"),
+ G_TYPE_FROM_CLASS (gobject_class),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (GtkScrolledWindowClass, scroll_child),
+ NULL, NULL,
+ _gtk_marshal_BOOLEAN__ENUM_BOOLEAN,
+ G_TYPE_BOOLEAN, 2,
+ GTK_TYPE_SCROLL_TYPE,
+ G_TYPE_BOOLEAN);
+
+ /**
+ * GtkScrolledWindow::move-focus-out:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @direction_type: either %GTK_DIR_TAB_FORWARD or
+ * %GTK_DIR_TAB_BACKWARD
+ *
+ * The ::move-focus-out signal is a
+ * <link linkend="keybinding-signals">keybinding signal</link>
+ * which gets emitted when focus is moved away from the scrolled
+ * window by a keybinding.
+ * The #GtkWidget::move-focus signal is emitted with @direction_type
+ * on this scrolled windows toplevel parent in the container hierarchy.
+ * The default bindings for this signal are
+ * <keycombo><keycap>Tab</keycap><keycap>Ctrl</keycap></keycombo>
+ * and
+ * <keycombo><keycap>Tab</keycap><keycap>Ctrl</keycap><keycap>Shift</keycap></keycombo>.
+ */
+ signals[MOVE_FOCUS_OUT] =
+ g_signal_new (I_("move-focus-out"),
+ G_TYPE_FROM_CLASS (gobject_class),
+ G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+ G_STRUCT_OFFSET (GtkScrolledWindowClass, move_focus_out),
+ NULL, NULL,
+ _gtk_marshal_VOID__ENUM,
+ G_TYPE_NONE, 1,
+ GTK_TYPE_DIRECTION_TYPE);
+
+ binding_set = gtk_binding_set_by_class (class);
- scrolled_window = GTK_SCROLLED_WINDOW (object);
+ add_scroll_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, TRUE);
+ add_scroll_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD, TRUE);
+ add_scroll_binding (binding_set, GDK_KEY_Up, GDK_CONTROL_MASK, GTK_SCROLL_STEP_BACKWARD, FALSE);
+ add_scroll_binding (binding_set, GDK_KEY_Down, GDK_CONTROL_MASK, GTK_SCROLL_STEP_FORWARD, FALSE);
- switch (arg_id)
- {
- case ARG_HADJUSTMENT:
- gtk_scrolled_window_set_hadjustment (scrolled_window, GTK_VALUE_POINTER (*arg));
- break;
- case ARG_VADJUSTMENT:
- gtk_scrolled_window_set_vadjustment (scrolled_window, GTK_VALUE_POINTER (*arg));
- break;
- case ARG_HSCROLLBAR_POLICY:
- gtk_scrolled_window_set_policy (scrolled_window,
- GTK_VALUE_ENUM (*arg),
- scrolled_window->vscrollbar_policy);
- break;
- case ARG_VSCROLLBAR_POLICY:
- gtk_scrolled_window_set_policy (scrolled_window,
- scrolled_window->hscrollbar_policy,
- GTK_VALUE_ENUM (*arg));
- break;
- case ARG_WINDOW_PLACEMENT:
- gtk_scrolled_window_set_placement (scrolled_window,
- GTK_VALUE_ENUM (*arg));
- break;
- default:
- break;
- }
-}
+ add_scroll_binding (binding_set, GDK_KEY_Page_Up, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_BACKWARD, TRUE);
+ add_scroll_binding (binding_set, GDK_KEY_Page_Down, GDK_CONTROL_MASK, GTK_SCROLL_PAGE_FORWARD, TRUE);
+ add_scroll_binding (binding_set, GDK_KEY_Page_Up, 0, GTK_SCROLL_PAGE_BACKWARD, FALSE);
+ add_scroll_binding (binding_set, GDK_KEY_Page_Down, 0, GTK_SCROLL_PAGE_FORWARD, FALSE);
-static void
-gtk_scrolled_window_get_arg (GtkObject *object,
- GtkArg *arg,
- guint arg_id)
-{
- GtkScrolledWindow *scrolled_window;
+ add_scroll_binding (binding_set, GDK_KEY_Home, GDK_CONTROL_MASK, GTK_SCROLL_START, TRUE);
+ add_scroll_binding (binding_set, GDK_KEY_End, GDK_CONTROL_MASK, GTK_SCROLL_END, TRUE);
+ add_scroll_binding (binding_set, GDK_KEY_Home, 0, GTK_SCROLL_START, FALSE);
+ add_scroll_binding (binding_set, GDK_KEY_End, 0, GTK_SCROLL_END, FALSE);
- scrolled_window = GTK_SCROLLED_WINDOW (object);
+ add_tab_bindings (binding_set, GDK_CONTROL_MASK, GTK_DIR_TAB_FORWARD);
+ add_tab_bindings (binding_set, GDK_CONTROL_MASK | GDK_SHIFT_MASK, GTK_DIR_TAB_BACKWARD);
- switch (arg_id)
- {
- case ARG_HADJUSTMENT:
- GTK_VALUE_POINTER (*arg) = gtk_scrolled_window_get_hadjustment (scrolled_window);
- break;
- case ARG_VADJUSTMENT:
- GTK_VALUE_POINTER (*arg) = gtk_scrolled_window_get_vadjustment (scrolled_window);
- break;
- case ARG_HSCROLLBAR_POLICY:
- GTK_VALUE_ENUM (*arg) = scrolled_window->hscrollbar_policy;
- break;
- case ARG_VSCROLLBAR_POLICY:
- GTK_VALUE_ENUM (*arg) = scrolled_window->vscrollbar_policy;
- break;
- case ARG_WINDOW_PLACEMENT:
- GTK_VALUE_ENUM (*arg) = scrolled_window->window_placement;
- break;
- default:
- arg->type = GTK_TYPE_INVALID;
- break;
- }
+ g_type_class_add_private (class, sizeof (GtkScrolledWindowPrivate));
+
+ gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCROLLED_WINDOW_ACCESSIBLE);
}
static void
gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
{
- GTK_WIDGET_SET_FLAGS (scrolled_window, GTK_NO_WINDOW);
-
- gtk_container_set_resize_mode (GTK_CONTAINER (scrolled_window), GTK_RESIZE_QUEUE);
-
- scrolled_window->hscrollbar = NULL;
- scrolled_window->vscrollbar = NULL;
- scrolled_window->hscrollbar_policy = GTK_POLICY_ALWAYS;
- scrolled_window->vscrollbar_policy = GTK_POLICY_ALWAYS;
- scrolled_window->hscrollbar_visible = FALSE;
- scrolled_window->vscrollbar_visible = FALSE;
- scrolled_window->window_placement = GTK_CORNER_TOP_LEFT;
+ GtkScrolledWindowPrivate *priv;
+
+ scrolled_window->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (scrolled_window,
+ GTK_TYPE_SCROLLED_WINDOW,
+ GtkScrolledWindowPrivate);
+
+ gtk_widget_set_has_window (GTK_WIDGET (scrolled_window), FALSE);
+ gtk_widget_set_can_focus (GTK_WIDGET (scrolled_window), TRUE);
+
+ priv->hscrollbar = NULL;
+ priv->vscrollbar = NULL;
+ priv->hscrollbar_policy = GTK_POLICY_AUTOMATIC;
+ priv->vscrollbar_policy = GTK_POLICY_AUTOMATIC;
+ priv->hscrollbar_visible = FALSE;
+ priv->vscrollbar_visible = FALSE;
+ priv->focus_out = FALSE;
+ priv->window_placement = GTK_CORNER_TOP_LEFT;
+ gtk_scrolled_window_update_real_placement (scrolled_window);
+ priv->min_content_width = -1;
+ priv->min_content_height = -1;
+
+ gtk_scrolled_window_set_kinetic_scrolling (scrolled_window, TRUE);
+ gtk_scrolled_window_set_capture_button_press (scrolled_window, TRUE);
}
+/**
+ * gtk_scrolled_window_new:
+ * @hadjustment: (allow-none): horizontal adjustment
+ * @vadjustment: (allow-none): vertical adjustment
+ *
+ * Creates a new scrolled window.
+ *
+ * The two arguments are the scrolled window's adjustments; these will be
+ * shared with the scrollbars and the child widget to keep the bars in sync
+ * with the child. Usually you want to pass %NULL for the adjustments, which
+ * will cause the scrolled window to create them for you.
+ *
+ * Returns: a new scrolled window
+ */
GtkWidget*
gtk_scrolled_window_new (GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment)
if (vadjustment)
g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadjustment), NULL);
- scrolled_window = gtk_widget_new (GTK_TYPE_SCROLLED_WINDOW,
+ scrolled_window = g_object_new (GTK_TYPE_SCROLLED_WINDOW,
"hadjustment", hadjustment,
"vadjustment", vadjustment,
NULL);
return scrolled_window;
}
-void
-gtk_scrolled_window_construct (GtkScrolledWindow *scrolled_window,
- GtkAdjustment *hadjustment,
- GtkAdjustment *vadjustment)
-{
- g_message ("gtk_scrolled_window_construct() is deprecated");
- gtk_scrolled_window_set_hadjustment (scrolled_window, hadjustment);
- gtk_scrolled_window_set_vadjustment (scrolled_window, vadjustment);
- gtk_object_default_construct (GTK_OBJECT (scrolled_window));
-}
-
+/**
+ * gtk_scrolled_window_set_hadjustment:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @hadjustment: horizontal scroll adjustment
+ *
+ * Sets the #GtkAdjustment for the horizontal scrollbar.
+ */
void
gtk_scrolled_window_set_hadjustment (GtkScrolledWindow *scrolled_window,
GtkAdjustment *hadjustment)
{
+ GtkScrolledWindowPrivate *priv;
GtkBin *bin;
+ GtkWidget *child;
- g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
if (hadjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (hadjustment));
else
- hadjustment = (GtkAdjustment*) gtk_object_new (GTK_TYPE_ADJUSTMENT, NULL);
+ hadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
bin = GTK_BIN (scrolled_window);
+ priv = scrolled_window->priv;
- if (!scrolled_window->hscrollbar)
+ if (!priv->hscrollbar)
{
gtk_widget_push_composite_child ();
- scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment);
- gtk_widget_set_composite_name (scrolled_window->hscrollbar, "hscrollbar");
+ priv->hscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_HORIZONTAL, hadjustment);
+ gtk_widget_set_composite_name (priv->hscrollbar, "hscrollbar");
gtk_widget_pop_composite_child ();
- gtk_widget_set_parent (scrolled_window->hscrollbar, GTK_WIDGET (scrolled_window));
- gtk_widget_ref (scrolled_window->hscrollbar);
- gtk_widget_show (scrolled_window->hscrollbar);
+ gtk_widget_set_parent (priv->hscrollbar, GTK_WIDGET (scrolled_window));
+ g_object_ref (priv->hscrollbar);
+ gtk_widget_show (priv->hscrollbar);
}
else
{
GtkAdjustment *old_adjustment;
-
- old_adjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar));
+
+ old_adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
if (old_adjustment == hadjustment)
return;
- gtk_signal_disconnect_by_func (GTK_OBJECT (old_adjustment),
- GTK_SIGNAL_FUNC (gtk_scrolled_window_adjustment_changed),
- scrolled_window);
- gtk_range_set_adjustment (GTK_RANGE (scrolled_window->hscrollbar),
+ g_signal_handlers_disconnect_by_func (old_adjustment,
+ gtk_scrolled_window_adjustment_changed,
+ scrolled_window);
+ gtk_range_set_adjustment (GTK_RANGE (priv->hscrollbar),
hadjustment);
}
- hadjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar));
- gtk_signal_connect (GTK_OBJECT (hadjustment),
- "changed",
- GTK_SIGNAL_FUNC (gtk_scrolled_window_adjustment_changed),
- scrolled_window);
+ hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
+ g_signal_connect (hadjustment,
+ "changed",
+ G_CALLBACK (gtk_scrolled_window_adjustment_changed),
+ scrolled_window);
+ g_signal_connect (hadjustment,
+ "value-changed",
+ G_CALLBACK (gtk_scrolled_window_adjustment_value_changed),
+ scrolled_window);
gtk_scrolled_window_adjustment_changed (hadjustment, scrolled_window);
-
- if (bin->child)
- gtk_widget_scroll_adjustements (bin->child,
- gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)),
- gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)));
+ gtk_scrolled_window_adjustment_value_changed (hadjustment, scrolled_window);
+
+ child = gtk_bin_get_child (bin);
+ if (GTK_IS_SCROLLABLE (child))
+ gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (child), hadjustment);
+
+ g_object_notify (G_OBJECT (scrolled_window), "hadjustment");
}
+/**
+ * gtk_scrolled_window_set_vadjustment:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @vadjustment: vertical scroll adjustment
+ *
+ * Sets the #GtkAdjustment for the vertical scrollbar.
+ */
void
gtk_scrolled_window_set_vadjustment (GtkScrolledWindow *scrolled_window,
- GtkAdjustment *vadjustment)
+ GtkAdjustment *vadjustment)
{
+ GtkScrolledWindowPrivate *priv;
GtkBin *bin;
+ GtkWidget *child;
- g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
if (vadjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (vadjustment));
else
- vadjustment = (GtkAdjustment*) gtk_object_new (GTK_TYPE_ADJUSTMENT, NULL);
+ vadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
bin = GTK_BIN (scrolled_window);
+ priv = scrolled_window->priv;
- if (!scrolled_window->vscrollbar)
+ if (!priv->vscrollbar)
{
gtk_widget_push_composite_child ();
- scrolled_window->vscrollbar = gtk_vscrollbar_new (vadjustment);
- gtk_widget_set_composite_name (scrolled_window->vscrollbar, "vscrollbar");
+ priv->vscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, vadjustment);
+ gtk_widget_set_composite_name (priv->vscrollbar, "vscrollbar");
gtk_widget_pop_composite_child ();
- gtk_widget_set_parent (scrolled_window->vscrollbar, GTK_WIDGET (scrolled_window));
- gtk_widget_ref (scrolled_window->vscrollbar);
- gtk_widget_show (scrolled_window->vscrollbar);
+ gtk_widget_set_parent (priv->vscrollbar, GTK_WIDGET (scrolled_window));
+ g_object_ref (priv->vscrollbar);
+ gtk_widget_show (priv->vscrollbar);
}
else
{
GtkAdjustment *old_adjustment;
- old_adjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar));
+ old_adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
if (old_adjustment == vadjustment)
return;
- gtk_signal_disconnect_by_func (GTK_OBJECT (old_adjustment),
- GTK_SIGNAL_FUNC (gtk_scrolled_window_adjustment_changed),
- scrolled_window);
- gtk_range_set_adjustment (GTK_RANGE (scrolled_window->vscrollbar),
+ g_signal_handlers_disconnect_by_func (old_adjustment,
+ gtk_scrolled_window_adjustment_changed,
+ scrolled_window);
+ gtk_range_set_adjustment (GTK_RANGE (priv->vscrollbar),
vadjustment);
}
- vadjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar));
- gtk_signal_connect (GTK_OBJECT (vadjustment),
- "changed",
- GTK_SIGNAL_FUNC (gtk_scrolled_window_adjustment_changed),
- scrolled_window);
+ vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
+ g_signal_connect (vadjustment,
+ "changed",
+ G_CALLBACK (gtk_scrolled_window_adjustment_changed),
+ scrolled_window);
+ g_signal_connect (vadjustment,
+ "value-changed",
+ G_CALLBACK (gtk_scrolled_window_adjustment_value_changed),
+ scrolled_window);
gtk_scrolled_window_adjustment_changed (vadjustment, scrolled_window);
+ gtk_scrolled_window_adjustment_value_changed (vadjustment, scrolled_window);
- if (bin->child)
- gtk_widget_scroll_adjustements (bin->child,
- gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)),
- gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)));
+ child = gtk_bin_get_child (bin);
+ if (GTK_IS_SCROLLABLE (child))
+ gtk_scrollable_set_vadjustment (GTK_SCROLLABLE (child), vadjustment);
+
+ g_object_notify (G_OBJECT (scrolled_window), "vadjustment");
}
+/**
+ * gtk_scrolled_window_get_hadjustment:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Returns the horizontal scrollbar's adjustment, used to connect the
+ * horizontal scrollbar to the child widget's horizontal scroll
+ * functionality.
+ *
+ * Returns: (transfer none): the horizontal #GtkAdjustment
+ */
GtkAdjustment*
gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window)
{
- g_return_val_if_fail (scrolled_window != NULL, NULL);
+ GtkScrolledWindowPrivate *priv;
+
g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
- return (scrolled_window->hscrollbar ?
- gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)) :
+ priv = scrolled_window->priv;
+
+ return (priv->hscrollbar ?
+ gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)) :
NULL);
}
+/**
+ * gtk_scrolled_window_get_vadjustment:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Returns the vertical scrollbar's adjustment, used to connect the
+ * vertical scrollbar to the child widget's vertical scroll functionality.
+ *
+ * Returns: (transfer none): the vertical #GtkAdjustment
+ */
GtkAdjustment*
gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window)
{
- g_return_val_if_fail (scrolled_window != NULL, NULL);
+ GtkScrolledWindowPrivate *priv;
+
g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
- return (scrolled_window->vscrollbar ?
- gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)) :
+ priv = scrolled_window->priv;
+
+ return (priv->vscrollbar ?
+ gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)) :
NULL);
}
+/**
+ * gtk_scrolled_window_get_hscrollbar:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Returns the horizontal scrollbar of @scrolled_window.
+ *
+ * Returns: (transfer none): the horizontal scrollbar of the scrolled window,
+ * or %NULL if it does not have one.
+ *
+ * Since: 2.8
+ */
+GtkWidget*
+gtk_scrolled_window_get_hscrollbar (GtkScrolledWindow *scrolled_window)
+{
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
+
+ return scrolled_window->priv->hscrollbar;
+}
+
+/**
+ * gtk_scrolled_window_get_vscrollbar:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Returns the vertical scrollbar of @scrolled_window.
+ *
+ * Returns: (transfer none): the vertical scrollbar of the scrolled window,
+ * or %NULL if it does not have one.
+ *
+ * Since: 2.8
+ */
+GtkWidget*
+gtk_scrolled_window_get_vscrollbar (GtkScrolledWindow *scrolled_window)
+{
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
+
+ return scrolled_window->priv->vscrollbar;
+}
+
+/**
+ * gtk_scrolled_window_set_policy:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @hscrollbar_policy: policy for horizontal bar
+ * @vscrollbar_policy: policy for vertical bar
+ *
+ * Sets the scrollbar policy for the horizontal and vertical scrollbars.
+ *
+ * The policy determines when the scrollbar should appear; it is a value
+ * from the #GtkPolicyType enumeration. If %GTK_POLICY_ALWAYS, the
+ * scrollbar is always present; if %GTK_POLICY_NEVER, the scrollbar is
+ * never present; if %GTK_POLICY_AUTOMATIC, the scrollbar is present only
+ * if needed (that is, if the slider part of the bar would be smaller
+ * than the trough - the display is larger than the page size).
+ */
void
gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window,
GtkPolicyType hscrollbar_policy,
GtkPolicyType vscrollbar_policy)
{
- g_return_if_fail (scrolled_window != NULL);
+ GtkScrolledWindowPrivate *priv;
+ GObject *object = G_OBJECT (scrolled_window);
+
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
- if ((scrolled_window->hscrollbar_policy != hscrollbar_policy) ||
- (scrolled_window->vscrollbar_policy != vscrollbar_policy))
+ priv = scrolled_window->priv;
+
+ if ((priv->hscrollbar_policy != hscrollbar_policy) ||
+ (priv->vscrollbar_policy != vscrollbar_policy))
{
- scrolled_window->hscrollbar_policy = hscrollbar_policy;
- scrolled_window->vscrollbar_policy = vscrollbar_policy;
+ priv->hscrollbar_policy = hscrollbar_policy;
+ priv->vscrollbar_policy = vscrollbar_policy;
gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
+
+ g_object_freeze_notify (object);
+ g_object_notify (object, "hscrollbar-policy");
+ g_object_notify (object, "vscrollbar-policy");
+ g_object_thaw_notify (object);
}
}
+/**
+ * gtk_scrolled_window_get_policy:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @hscrollbar_policy: (out) (allow-none): location to store the policy
+ * for the horizontal scrollbar, or %NULL.
+ * @vscrollbar_policy: (out) (allow-none): location to store the policy
+ * for the vertical scrollbar, or %NULL.
+ *
+ * Retrieves the current policy values for the horizontal and vertical
+ * scrollbars. See gtk_scrolled_window_set_policy().
+ */
void
-gtk_scrolled_window_set_placement (GtkScrolledWindow *scrolled_window,
- GtkCornerType window_placement)
+gtk_scrolled_window_get_policy (GtkScrolledWindow *scrolled_window,
+ GtkPolicyType *hscrollbar_policy,
+ GtkPolicyType *vscrollbar_policy)
{
- g_return_if_fail (scrolled_window != NULL);
+ GtkScrolledWindowPrivate *priv;
+
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
- if (scrolled_window->window_placement != window_placement)
- {
- scrolled_window->window_placement = window_placement;
+ priv = scrolled_window->priv;
- gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
- }
+ if (hscrollbar_policy)
+ *hscrollbar_policy = priv->hscrollbar_policy;
+ if (vscrollbar_policy)
+ *vscrollbar_policy = priv->vscrollbar_policy;
}
static void
-gtk_scrolled_window_destroy (GtkObject *object)
+gtk_scrolled_window_update_real_placement (GtkScrolledWindow *scrolled_window)
{
- GtkScrolledWindow *scrolled_window;
-
- g_return_if_fail (object != NULL);
- g_return_if_fail (GTK_IS_SCROLLED_WINDOW (object));
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkSettings *settings;
- scrolled_window = GTK_SCROLLED_WINDOW (object);
+ settings = gtk_widget_get_settings (GTK_WIDGET (scrolled_window));
- gtk_widget_unparent (scrolled_window->hscrollbar);
- gtk_widget_unparent (scrolled_window->vscrollbar);
- gtk_widget_destroy (scrolled_window->hscrollbar);
- gtk_widget_destroy (scrolled_window->vscrollbar);
-
- GTK_OBJECT_CLASS (parent_class)->destroy (object);
+ if (priv->window_placement_set || settings == NULL)
+ priv->real_window_placement = priv->window_placement;
+ else
+ g_object_get (settings,
+ "gtk-scrolled-window-placement",
+ &priv->real_window_placement,
+ NULL);
}
static void
-gtk_scrolled_window_finalize (GtkObject *object)
+gtk_scrolled_window_set_placement_internal (GtkScrolledWindow *scrolled_window,
+ GtkCornerType window_placement)
{
- GtkScrolledWindow *scrolled_window;
-
- scrolled_window = GTK_SCROLLED_WINDOW (object);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
- gtk_widget_unref (scrolled_window->hscrollbar);
- gtk_widget_unref (scrolled_window->vscrollbar);
+ if (priv->window_placement != window_placement)
+ {
+ priv->window_placement = window_placement;
- GTK_OBJECT_CLASS (parent_class)->finalize (object);
+ gtk_scrolled_window_update_real_placement (scrolled_window);
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
+
+ g_object_notify (G_OBJECT (scrolled_window), "window-placement");
+ }
}
static void
-gtk_scrolled_window_map (GtkWidget *widget)
+gtk_scrolled_window_set_placement_set (GtkScrolledWindow *scrolled_window,
+ gboolean placement_set,
+ gboolean emit_resize)
{
- GtkScrolledWindow *scrolled_window;
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
+ if (priv->window_placement_set != placement_set)
+ {
+ priv->window_placement_set = placement_set;
- scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ gtk_scrolled_window_update_real_placement (scrolled_window);
+ if (emit_resize)
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
- /* chain parent class handler to map self and child */
- GTK_WIDGET_CLASS (parent_class)->map (widget);
-
- if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar) &&
- !GTK_WIDGET_MAPPED (scrolled_window->hscrollbar))
- gtk_widget_map (scrolled_window->hscrollbar);
-
- if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar) &&
- !GTK_WIDGET_MAPPED (scrolled_window->vscrollbar))
- gtk_widget_map (scrolled_window->vscrollbar);
+ g_object_notify (G_OBJECT (scrolled_window), "window-placement-set");
+ }
}
-static void
-gtk_scrolled_window_unmap (GtkWidget *widget)
+/**
+ * gtk_scrolled_window_set_placement:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @window_placement: position of the child window
+ *
+ * Sets the placement of the contents with respect to the scrollbars
+ * for the scrolled window.
+ *
+ * The default is %GTK_CORNER_TOP_LEFT, meaning the child is
+ * in the top left, with the scrollbars underneath and to the right.
+ * Other values in #GtkCornerType are %GTK_CORNER_TOP_RIGHT,
+ * %GTK_CORNER_BOTTOM_LEFT, and %GTK_CORNER_BOTTOM_RIGHT.
+ *
+ * See also gtk_scrolled_window_get_placement() and
+ * gtk_scrolled_window_unset_placement().
+ */
+void
+gtk_scrolled_window_set_placement (GtkScrolledWindow *scrolled_window,
+ GtkCornerType window_placement)
{
- GtkScrolledWindow *scrolled_window;
-
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
-
- scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
- /* chain parent class handler to unmap self and child */
- GTK_WIDGET_CLASS (parent_class)->unmap (widget);
-
- if (GTK_WIDGET_MAPPED (scrolled_window->hscrollbar))
- gtk_widget_unmap (scrolled_window->hscrollbar);
-
- if (GTK_WIDGET_MAPPED (scrolled_window->vscrollbar))
- gtk_widget_unmap (scrolled_window->vscrollbar);
+ gtk_scrolled_window_set_placement_set (scrolled_window, TRUE, FALSE);
+ gtk_scrolled_window_set_placement_internal (scrolled_window, window_placement);
}
-static void
-gtk_scrolled_window_draw (GtkWidget *widget,
- GdkRectangle *area)
+/**
+ * gtk_scrolled_window_get_placement:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Gets the placement of the contents with respect to the scrollbars
+ * for the scrolled window. See gtk_scrolled_window_set_placement().
+ *
+ * Return value: the current placement value.
+ *
+ * See also gtk_scrolled_window_set_placement() and
+ * gtk_scrolled_window_unset_placement().
+ **/
+GtkCornerType
+gtk_scrolled_window_get_placement (GtkScrolledWindow *scrolled_window)
{
- GtkScrolledWindow *scrolled_window;
- GtkBin *bin;
- GdkRectangle child_area;
-
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
- g_return_if_fail (area != NULL);
-
- scrolled_window = GTK_SCROLLED_WINDOW (widget);
- bin = GTK_BIN (widget);
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_CORNER_TOP_LEFT);
- if (bin->child && GTK_WIDGET_VISIBLE (bin->child) &&
- gtk_widget_intersect (bin->child, area, &child_area))
- gtk_widget_draw (bin->child, &child_area);
-
- if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar) &&
- gtk_widget_intersect (scrolled_window->hscrollbar, area, &child_area))
- gtk_widget_draw (scrolled_window->hscrollbar, &child_area);
-
- if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar) &&
- gtk_widget_intersect (scrolled_window->vscrollbar, area, &child_area))
- gtk_widget_draw (scrolled_window->vscrollbar, &child_area);
+ return scrolled_window->priv->window_placement;
}
-static void
-gtk_scrolled_window_forall (GtkContainer *container,
- gboolean include_internals,
- GtkCallback callback,
- gpointer callback_data)
+/**
+ * gtk_scrolled_window_unset_placement:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Unsets the placement of the contents with respect to the scrollbars
+ * for the scrolled window. If no window placement is set for a scrolled
+ * window, it obeys the "gtk-scrolled-window-placement" XSETTING.
+ *
+ * See also gtk_scrolled_window_set_placement() and
+ * gtk_scrolled_window_get_placement().
+ *
+ * Since: 2.10
+ **/
+void
+gtk_scrolled_window_unset_placement (GtkScrolledWindow *scrolled_window)
{
- g_return_if_fail (container != NULL);
- g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
- g_return_if_fail (callback != NULL);
+ GtkScrolledWindowPrivate *priv;
- GTK_CONTAINER_CLASS (parent_class)->forall (container,
- include_internals,
- callback,
- callback_data);
- if (include_internals)
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
+
+ priv = scrolled_window->priv;
+
+ if (priv->window_placement_set)
{
- GtkScrolledWindow *scrolled_window;
+ priv->window_placement_set = FALSE;
- scrolled_window = GTK_SCROLLED_WINDOW (container);
-
- if (scrolled_window->vscrollbar)
- callback (scrolled_window->vscrollbar, callback_data);
- if (scrolled_window->hscrollbar)
- callback (scrolled_window->hscrollbar, callback_data);
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
+
+ g_object_notify (G_OBJECT (scrolled_window), "window-placement-set");
}
}
-static void
-gtk_scrolled_window_size_request (GtkWidget *widget,
- GtkRequisition *requisition)
+/**
+ * gtk_scrolled_window_set_shadow_type:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @type: kind of shadow to draw around scrolled window contents
+ *
+ * Changes the type of shadow drawn around the contents of
+ * @scrolled_window.
+ *
+ **/
+void
+gtk_scrolled_window_set_shadow_type (GtkScrolledWindow *scrolled_window,
+ GtkShadowType type)
{
- GtkScrolledWindow *scrolled_window;
- GtkBin *bin;
- gint extra_height;
- gint extra_width;
+ GtkScrolledWindowPrivate *priv;
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
- g_return_if_fail (requisition != NULL);
-
- scrolled_window = GTK_SCROLLED_WINDOW (widget);
- bin = GTK_BIN (scrolled_window);
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
+ g_return_if_fail (type >= GTK_SHADOW_NONE && type <= GTK_SHADOW_ETCHED_OUT);
- requisition->width = 0;
- requisition->height = 0;
+ priv = scrolled_window->priv;
- if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
+ if (priv->shadow_type != type)
{
- gtk_widget_size_request (bin->child, &bin->child->requisition);
-
- requisition->width += bin->child->requisition.width;
- requisition->height += bin->child->requisition.height;
- }
+ priv->shadow_type = type;
- extra_width = 0;
- extra_height = 0;
+ if (gtk_widget_is_drawable (GTK_WIDGET (scrolled_window)))
+ gtk_widget_queue_draw (GTK_WIDGET (scrolled_window));
- if ((scrolled_window->hscrollbar_policy == GTK_POLICY_AUTOMATIC) ||
- GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
- {
- gtk_widget_size_request (scrolled_window->hscrollbar,
- &scrolled_window->hscrollbar->requisition);
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
- requisition->width = MAX (requisition->width, scrolled_window->hscrollbar->requisition.width);
- extra_height = SCROLLBAR_SPACING (scrolled_window) + scrolled_window->hscrollbar->requisition.height;
+ g_object_notify (G_OBJECT (scrolled_window), "shadow-type");
}
+}
- if ((scrolled_window->vscrollbar_policy == GTK_POLICY_AUTOMATIC) ||
- GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
- {
- gtk_widget_size_request (scrolled_window->vscrollbar,
- &scrolled_window->vscrollbar->requisition);
-
- requisition->height = MAX (requisition->height, scrolled_window->vscrollbar->requisition.height);
- extra_width = SCROLLBAR_SPACING (scrolled_window) + scrolled_window->vscrollbar->requisition.width;
- }
+/**
+ * gtk_scrolled_window_get_shadow_type:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Gets the shadow type of the scrolled window. See
+ * gtk_scrolled_window_set_shadow_type().
+ *
+ * Return value: the current shadow type
+ **/
+GtkShadowType
+gtk_scrolled_window_get_shadow_type (GtkScrolledWindow *scrolled_window)
+{
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_SHADOW_NONE);
- requisition->width += GTK_CONTAINER (widget)->border_width * 2 + extra_width;
- requisition->height += GTK_CONTAINER (widget)->border_width * 2 + extra_height;
+ return scrolled_window->priv->shadow_type;
}
-static void
-gtk_scrolled_window_relative_allocation (GtkWidget *widget,
- GtkAllocation *allocation)
+/**
+ * gtk_scrolled_window_set_kinetic_scrolling:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @kinetic_scrolling: %TRUE to enable kinetic scrolling
+ *
+ * Turns kinetic scrolling on or off.
+ * Kinetic scrolling only applies to devices with source
+ * %GDK_SOURCE_TOUCHSCREEN.
+ *
+ * Since: 3.4
+ **/
+void
+gtk_scrolled_window_set_kinetic_scrolling (GtkScrolledWindow *scrolled_window,
+ gboolean kinetic_scrolling)
{
- GtkScrolledWindow *scrolled_window;
-
- g_return_if_fail (widget != NULL);
- g_return_if_fail (allocation != NULL);
+ GtkScrolledWindowPrivate *priv;
- scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
- allocation->x = GTK_CONTAINER (widget)->border_width;
- allocation->y = GTK_CONTAINER (widget)->border_width;
- allocation->width = MAX (1, widget->allocation.width - allocation->x * 2);
- allocation->height = MAX (1, widget->allocation.height - allocation->y * 2);
+ priv = scrolled_window->priv;
+ if (priv->kinetic_scrolling == kinetic_scrolling)
+ return;
- if (scrolled_window->vscrollbar_visible)
+ priv->kinetic_scrolling = kinetic_scrolling;
+ if (priv->kinetic_scrolling)
{
- if (scrolled_window->window_placement == GTK_CORNER_TOP_RIGHT ||
- scrolled_window->window_placement == GTK_CORNER_BOTTOM_RIGHT)
- allocation->x += (scrolled_window->vscrollbar->requisition.width +
- SCROLLBAR_SPACING (scrolled_window));
-
- allocation->width = MAX (1, allocation->width -
- (scrolled_window->vscrollbar->requisition.width +
- SCROLLBAR_SPACING (scrolled_window)));
+ _gtk_widget_set_captured_event_handler (GTK_WIDGET (scrolled_window),
+ gtk_scrolled_window_captured_event);
}
- if (scrolled_window->hscrollbar_visible)
+ else
{
- if (scrolled_window->window_placement == GTK_CORNER_BOTTOM_LEFT ||
- scrolled_window->window_placement == GTK_CORNER_BOTTOM_RIGHT)
- allocation->y += (scrolled_window->hscrollbar->requisition.height +
- SCROLLBAR_SPACING (scrolled_window));
-
- allocation->height = MAX (1, allocation->height -
- (scrolled_window->hscrollbar->requisition.height +
- SCROLLBAR_SPACING (scrolled_window)));
+ _gtk_widget_set_captured_event_handler (GTK_WIDGET (scrolled_window), NULL);
+ if (priv->release_timeout_id)
+ {
+ g_source_remove (priv->release_timeout_id);
+ priv->release_timeout_id = 0;
+ }
+ if (priv->deceleration_id)
+ {
+ g_source_remove (priv->deceleration_id);
+ priv->deceleration_id = 0;
+ }
}
+ g_object_notify (G_OBJECT (scrolled_window), "kinetic-scrolling");
}
-static void
-gtk_scrolled_window_size_allocate (GtkWidget *widget,
- GtkAllocation *allocation)
+/**
+ * gtk_scrolled_window_get_kinetic_scrolling:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Returns the specified kinetic scrolling behavior.
+ *
+ * Return value: the scrolling behavior flags.
+ *
+ * Since: 3.4
+ */
+gboolean
+gtk_scrolled_window_get_kinetic_scrolling (GtkScrolledWindow *scrolled_window)
{
- GtkScrolledWindow *scrolled_window;
- GtkBin *bin;
- GtkAllocation relative_allocation;
- GtkAllocation child_allocation;
-
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), FALSE);
+
+ return scrolled_window->priv->kinetic_scrolling;
+}
+
+/**
+ * gtk_scrolled_window_set_capture_button_press:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @capture_button_press: %TRUE to capture button presses
+ *
+ * Changes the behaviour of @scrolled_window wrt. to the initial
+ * event that possibly starts kinetic scrolling. When @capture_button_press
+ * is set to %TRUE, the event is captured by the scrolled window, and
+ * then later replayed if it is meant to go to the child widget.
+ *
+ * This should be enabled if any child widgets perform non-reversible
+ * actions on #GtkWidget::button-press-event. If they don't, and handle
+ * additionally handle #GtkWidget::grab-broken-event, it might be better
+ * to set @capture_button_press to %FALSE.
+ *
+ * This setting only has an effect if kinetic scrolling is enabled.
+ *
+ * Since: 3.4
+ */
+void
+gtk_scrolled_window_set_capture_button_press (GtkScrolledWindow *scrolled_window,
+ gboolean capture_button_press)
+{
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
+
+ scrolled_window->priv->capture_button_press = capture_button_press;
+}
+
+/**
+ * gtk_scrolled_window_get_capture_button_press:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Return whether button presses are captured during kinetic
+ * scrolling. See gtk_scrolled_window_set_capture_button_press().
+ *
+ * Returns: %TRUE if button presses are captured during kinetic scrolling
+ *
+ * Since: 3.4
+ */
+gboolean
+gtk_scrolled_window_get_capture_button_press (GtkScrolledWindow *scrolled_window)
+{
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), FALSE);
+
+ return scrolled_window->priv->capture_button_press;
+}
+
+
+static void
+gtk_scrolled_window_destroy (GtkWidget *widget)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+
+ if (priv->hscrollbar)
+ {
+ g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)),
+ gtk_scrolled_window_adjustment_changed,
+ scrolled_window);
+ gtk_widget_unparent (priv->hscrollbar);
+ gtk_widget_destroy (priv->hscrollbar);
+ g_object_unref (priv->hscrollbar);
+ priv->hscrollbar = NULL;
+ }
+ if (priv->vscrollbar)
+ {
+ g_signal_handlers_disconnect_by_func (gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)),
+ gtk_scrolled_window_adjustment_changed,
+ scrolled_window);
+ gtk_widget_unparent (priv->vscrollbar);
+ gtk_widget_destroy (priv->vscrollbar);
+ g_object_unref (priv->vscrollbar);
+ priv->vscrollbar = NULL;
+ }
+
+ if (priv->release_timeout_id)
+ {
+ g_source_remove (priv->release_timeout_id);
+ priv->release_timeout_id = 0;
+ }
+ if (priv->deceleration_id)
+ {
+ g_source_remove (priv->deceleration_id);
+ priv->deceleration_id = 0;
+ }
+
+ if (priv->button_press_event)
+ {
+ gdk_event_free (priv->button_press_event);
+ priv->button_press_event = NULL;
+ }
+
+ GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->destroy (widget);
+}
+
+static void
+gtk_scrolled_window_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+
+ switch (prop_id)
+ {
+ case PROP_HADJUSTMENT:
+ gtk_scrolled_window_set_hadjustment (scrolled_window,
+ g_value_get_object (value));
+ break;
+ case PROP_VADJUSTMENT:
+ gtk_scrolled_window_set_vadjustment (scrolled_window,
+ g_value_get_object (value));
+ break;
+ case PROP_HSCROLLBAR_POLICY:
+ gtk_scrolled_window_set_policy (scrolled_window,
+ g_value_get_enum (value),
+ priv->vscrollbar_policy);
+ break;
+ case PROP_VSCROLLBAR_POLICY:
+ gtk_scrolled_window_set_policy (scrolled_window,
+ priv->hscrollbar_policy,
+ g_value_get_enum (value));
+ break;
+ case PROP_WINDOW_PLACEMENT:
+ gtk_scrolled_window_set_placement_internal (scrolled_window,
+ g_value_get_enum (value));
+ break;
+ case PROP_WINDOW_PLACEMENT_SET:
+ gtk_scrolled_window_set_placement_set (scrolled_window,
+ g_value_get_boolean (value),
+ TRUE);
+ break;
+ case PROP_SHADOW_TYPE:
+ gtk_scrolled_window_set_shadow_type (scrolled_window,
+ g_value_get_enum (value));
+ break;
+ case PROP_MIN_CONTENT_WIDTH:
+ gtk_scrolled_window_set_min_content_width (scrolled_window,
+ g_value_get_int (value));
+ break;
+ case PROP_MIN_CONTENT_HEIGHT:
+ gtk_scrolled_window_set_min_content_height (scrolled_window,
+ g_value_get_int (value));
+ break;
+ case PROP_KINETIC_SCROLLING:
+ gtk_scrolled_window_set_kinetic_scrolling (scrolled_window,
+ g_value_get_boolean (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gtk_scrolled_window_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+
+ switch (prop_id)
+ {
+ case PROP_HADJUSTMENT:
+ g_value_set_object (value,
+ G_OBJECT (gtk_scrolled_window_get_hadjustment (scrolled_window)));
+ break;
+ case PROP_VADJUSTMENT:
+ g_value_set_object (value,
+ G_OBJECT (gtk_scrolled_window_get_vadjustment (scrolled_window)));
+ break;
+ case PROP_WINDOW_PLACEMENT:
+ g_value_set_enum (value, priv->window_placement);
+ break;
+ case PROP_WINDOW_PLACEMENT_SET:
+ g_value_set_boolean (value, priv->window_placement_set);
+ break;
+ case PROP_SHADOW_TYPE:
+ g_value_set_enum (value, priv->shadow_type);
+ break;
+ case PROP_HSCROLLBAR_POLICY:
+ g_value_set_enum (value, priv->hscrollbar_policy);
+ break;
+ case PROP_VSCROLLBAR_POLICY:
+ g_value_set_enum (value, priv->vscrollbar_policy);
+ break;
+ case PROP_MIN_CONTENT_WIDTH:
+ g_value_set_int (value, priv->min_content_width);
+ break;
+ case PROP_MIN_CONTENT_HEIGHT:
+ g_value_set_int (value, priv->min_content_height);
+ break;
+ case PROP_KINETIC_SCROLLING:
+ g_value_set_boolean (value, priv->kinetic_scrolling);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+traverse_container (GtkWidget *widget,
+ gpointer data)
+{
+ if (GTK_IS_SCROLLED_WINDOW (widget))
+ {
+ gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget));
+ gtk_widget_queue_resize (widget);
+ }
+ else if (GTK_IS_CONTAINER (widget))
+ gtk_container_forall (GTK_CONTAINER (widget), traverse_container, NULL);
+}
+
+static void
+gtk_scrolled_window_settings_changed (GtkSettings *settings)
+{
+ GList *list, *l;
+
+ list = gtk_window_list_toplevels ();
+
+ for (l = list; l; l = l->next)
+ gtk_container_forall (GTK_CONTAINER (l->data),
+ traverse_container, NULL);
+
+ g_list_free (list);
+}
+
+static void
+gtk_scrolled_window_screen_changed (GtkWidget *widget,
+ GdkScreen *previous_screen)
+{
+ GtkSettings *settings;
+ guint window_placement_connection;
+
+ gtk_scrolled_window_update_real_placement (GTK_SCROLLED_WINDOW (widget));
+
+ if (!gtk_widget_has_screen (widget))
+ return;
+
+ settings = gtk_widget_get_settings (widget);
+
+ window_placement_connection =
+ GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (settings),
+ "gtk-scrolled-window-connection"));
+
+ if (window_placement_connection)
+ return;
+
+ window_placement_connection =
+ g_signal_connect (settings, "notify::gtk-scrolled-window-placement",
+ G_CALLBACK (gtk_scrolled_window_settings_changed), NULL);
+ g_object_set_data (G_OBJECT (settings),
+ I_("gtk-scrolled-window-connection"),
+ GUINT_TO_POINTER (window_placement_connection));
+}
+
+static void
+gtk_scrolled_window_draw_scrollbars_junction (GtkScrolledWindow *scrolled_window,
+ cairo_t *cr)
+{
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkWidget *widget = GTK_WIDGET (scrolled_window);
+ GtkAllocation wid_allocation, hscr_allocation, vscr_allocation;
+ GtkStyleContext *context;
+ GdkRectangle junction_rect;
+ gboolean is_rtl, scrollbars_within_bevel;
+
+ is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
+ gtk_widget_get_allocation (widget, &wid_allocation);
+ gtk_widget_get_allocation (GTK_WIDGET (priv->hscrollbar), &hscr_allocation);
+ gtk_widget_get_allocation (GTK_WIDGET (priv->vscrollbar), &vscr_allocation);
+
+ gtk_widget_style_get (widget,
+ "scrollbars-within-bevel", &scrollbars_within_bevel,
+ NULL);
+ context = gtk_widget_get_style_context (widget);
+
+ if (scrollbars_within_bevel &&
+ priv->shadow_type != GTK_SHADOW_NONE)
+ {
+ GtkStateFlags state;
+ GtkBorder padding, border;
+
+ state = gtk_widget_get_state_flags (widget);
+
+ gtk_style_context_save (context);
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
+ gtk_style_context_get_padding (context, state, &padding);
+ gtk_style_context_get_border (context, state, &border);
+ gtk_style_context_restore (context);
+
+ junction_rect.x = padding.left + border.left;
+ junction_rect.y = padding.top + border.top;
+ }
+ else
+ {
+ junction_rect.x = 0;
+ junction_rect.y = 0;
+ }
+
+ junction_rect.width = vscr_allocation.width;
+ junction_rect.height = hscr_allocation.height;
+
+ if ((is_rtl &&
+ (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
+ (!is_rtl &&
+ (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
+ junction_rect.x += hscr_allocation.width;
+
+ if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+ priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
+ junction_rect.y += vscr_allocation.height;
+
+ gtk_style_context_save (context);
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_SCROLLBARS_JUNCTION);
+
+ gtk_render_background (context, cr,
+ junction_rect.x, junction_rect.y,
+ junction_rect.width, junction_rect.height);
+ gtk_render_frame (context, cr,
+ junction_rect.x, junction_rect.y,
+ junction_rect.width, junction_rect.height);
+
+ gtk_style_context_restore (context);
+}
+
+static gboolean
+gtk_scrolled_window_draw (GtkWidget *widget,
+ cairo_t *cr)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkAllocation relative_allocation;
+ GtkStyleContext *context;
+
+ context = gtk_widget_get_style_context (widget);
+ gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
+
+ gtk_render_background (context, cr,
+ 0, 0,
+ gtk_widget_get_allocated_width (widget), gtk_widget_get_allocated_height (widget));
+
+ if (priv->hscrollbar_visible &&
+ priv->vscrollbar_visible)
+ gtk_scrolled_window_draw_scrollbars_junction (scrolled_window, cr);
+
+ if (priv->shadow_type != GTK_SHADOW_NONE)
+ {
+ gboolean scrollbars_within_bevel;
+
+ gtk_style_context_save (context);
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
+
+ gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL);
+
+ if (!scrollbars_within_bevel)
+ {
+ GtkStateFlags state;
+ GtkBorder padding, border;
+
+ state = gtk_widget_get_state_flags (widget);
+ gtk_style_context_get_padding (context, state, &padding);
+ gtk_style_context_get_border (context, state, &border);
+
+ relative_allocation.x -= padding.left + border.left;
+ relative_allocation.y -= padding.top + border.top;
+ relative_allocation.width += padding.left + padding.right + border.left + border.right;
+ relative_allocation.height += padding.top + padding.bottom + border.top + border.bottom;
+ }
+ else
+ {
+ relative_allocation.x = 0;
+ relative_allocation.y = 0;
+ relative_allocation.width = gtk_widget_get_allocated_width (widget);
+ relative_allocation.height = gtk_widget_get_allocated_height (widget);
+ }
+
+ gtk_render_frame (context, cr,
+ relative_allocation.x,
+ relative_allocation.y,
+ relative_allocation.width,
+ relative_allocation.height);
+
+ gtk_style_context_restore (context);
+ }
+
+ GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->draw (widget, cr);
+
+ return FALSE;
+}
+
+static void
+gtk_scrolled_window_forall (GtkContainer *container,
+ gboolean include_internals,
+ GtkCallback callback,
+ gpointer callback_data)
+{
+ GtkScrolledWindowPrivate *priv;
+ GtkScrolledWindow *scrolled_window;
+
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
+ g_return_if_fail (callback != NULL);
+
+ GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->forall (container,
+ include_internals,
+ callback,
+ callback_data);
+ if (include_internals)
+ {
+ scrolled_window = GTK_SCROLLED_WINDOW (container);
+ priv = scrolled_window->priv;
+
+ if (priv->vscrollbar)
+ callback (priv->vscrollbar, callback_data);
+ if (priv->hscrollbar)
+ callback (priv->hscrollbar, callback_data);
+ }
+}
+
+static gboolean
+gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window,
+ GtkScrollType scroll,
+ gboolean horizontal)
+{
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkAdjustment *adjustment = NULL;
+
+ switch (scroll)
+ {
+ case GTK_SCROLL_STEP_UP:
+ scroll = GTK_SCROLL_STEP_BACKWARD;
+ horizontal = FALSE;
+ break;
+ case GTK_SCROLL_STEP_DOWN:
+ scroll = GTK_SCROLL_STEP_FORWARD;
+ horizontal = FALSE;
+ break;
+ case GTK_SCROLL_STEP_LEFT:
+ scroll = GTK_SCROLL_STEP_BACKWARD;
+ horizontal = TRUE;
+ break;
+ case GTK_SCROLL_STEP_RIGHT:
+ scroll = GTK_SCROLL_STEP_FORWARD;
+ horizontal = TRUE;
+ break;
+ case GTK_SCROLL_PAGE_UP:
+ scroll = GTK_SCROLL_PAGE_BACKWARD;
+ horizontal = FALSE;
+ break;
+ case GTK_SCROLL_PAGE_DOWN:
+ scroll = GTK_SCROLL_PAGE_FORWARD;
+ horizontal = FALSE;
+ break;
+ case GTK_SCROLL_PAGE_LEFT:
+ scroll = GTK_SCROLL_STEP_BACKWARD;
+ horizontal = TRUE;
+ break;
+ case GTK_SCROLL_PAGE_RIGHT:
+ scroll = GTK_SCROLL_STEP_FORWARD;
+ horizontal = TRUE;
+ break;
+ case GTK_SCROLL_STEP_BACKWARD:
+ case GTK_SCROLL_STEP_FORWARD:
+ case GTK_SCROLL_PAGE_BACKWARD:
+ case GTK_SCROLL_PAGE_FORWARD:
+ case GTK_SCROLL_START:
+ case GTK_SCROLL_END:
+ break;
+ default:
+ g_warning ("Invalid scroll type %u for GtkScrolledWindow::scroll-child", scroll);
+ return FALSE;
+ }
+
+ if ((horizontal && (!priv->hscrollbar || !priv->hscrollbar_visible)) ||
+ (!horizontal && (!priv->vscrollbar || !priv->vscrollbar_visible)))
+ return FALSE;
+
+ if (horizontal)
+ {
+ if (priv->hscrollbar)
+ adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
+ }
+ else
+ {
+ if (priv->vscrollbar)
+ adjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
+ }
+
+ if (adjustment)
+ {
+ gdouble value = gtk_adjustment_get_value (adjustment);
+
+ switch (scroll)
+ {
+ case GTK_SCROLL_STEP_FORWARD:
+ value += gtk_adjustment_get_step_increment (adjustment);
+ break;
+ case GTK_SCROLL_STEP_BACKWARD:
+ value -= gtk_adjustment_get_step_increment (adjustment);
+ break;
+ case GTK_SCROLL_PAGE_FORWARD:
+ value += gtk_adjustment_get_page_increment (adjustment);
+ break;
+ case GTK_SCROLL_PAGE_BACKWARD:
+ value -= gtk_adjustment_get_page_increment (adjustment);
+ break;
+ case GTK_SCROLL_START:
+ value = gtk_adjustment_get_lower (adjustment);
+ break;
+ case GTK_SCROLL_END:
+ value = gtk_adjustment_get_upper (adjustment);
+ break;
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+
+ gtk_adjustment_set_value (adjustment, value);
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static void
+gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window,
+ GtkDirectionType direction_type)
+{
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkWidget *toplevel;
+
+ /* Focus out of the scrolled window entirely. We do this by setting
+ * a flag, then propagating the focus motion to the notebook.
+ */
+ toplevel = gtk_widget_get_toplevel (GTK_WIDGET (scrolled_window));
+ if (!gtk_widget_is_toplevel (toplevel))
+ return;
+
+ g_object_ref (scrolled_window);
+
+ priv->focus_out = TRUE;
+ g_signal_emit_by_name (toplevel, "move-focus", direction_type);
+ priv->focus_out = FALSE;
+
+ g_object_unref (scrolled_window);
+}
+
+static void
+gtk_scrolled_window_relative_allocation (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ GtkAllocation widget_allocation;
+ GtkScrolledWindow *scrolled_window;
+ GtkScrolledWindowPrivate *priv;
+ gint sb_spacing;
+ gint sb_width;
+ gint sb_height;
+
+ g_return_if_fail (widget != NULL);
+ g_return_if_fail (allocation != NULL);
+
+ scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ priv = scrolled_window->priv;
+
+ /* Get possible scrollbar dimensions */
+ sb_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
+ gtk_widget_get_preferred_height (priv->hscrollbar, &sb_height, NULL);
+ gtk_widget_get_preferred_width (priv->vscrollbar, &sb_width, NULL);
+
+ gtk_widget_get_allocation (widget, &widget_allocation);
+
+ allocation->x = 0;
+ allocation->y = 0;
+ allocation->width = widget_allocation.width;
+ allocation->height = widget_allocation.height;
+
+ /* Subtract some things from our available allocation size */
+ if (priv->shadow_type != GTK_SHADOW_NONE)
+ {
+ GtkStyleContext *context;
+ GtkStateFlags state;
+ GtkBorder padding, border;
+
+ context = gtk_widget_get_style_context (widget);
+ state = gtk_widget_get_state_flags (widget);
+
+ gtk_style_context_save (context);
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
+
+ gtk_style_context_get_border (context, state, &border);
+ gtk_style_context_get_padding (context, state, &padding);
+
+ allocation->x += padding.left + border.left;
+ allocation->y += padding.top + border.top;
+ allocation->width = MAX (1, allocation->width - (padding.left + border.left + padding.right + border.right));
+ allocation->height = MAX (1, allocation->height - (padding.top + border.top + padding.bottom + border.bottom));
+
+ gtk_style_context_restore (context);
+ }
+
+ if (priv->vscrollbar_visible)
+ {
+ gboolean is_rtl;
+
+ is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
+
+ if ((!is_rtl &&
+ (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
+ (is_rtl &&
+ (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
+ allocation->x += (sb_width + sb_spacing);
+
+ allocation->width = MAX (1, allocation->width - (sb_width + sb_spacing));
+ }
+ if (priv->hscrollbar_visible)
+ {
+
+ if (priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)
+ allocation->y += (sb_height + sb_spacing);
+
+ allocation->height = MAX (1, allocation->height - (sb_height + sb_spacing));
+ }
+}
+
+static gboolean
+_gtk_scrolled_window_get_overshoot (GtkScrolledWindow *scrolled_window,
+ gint *overshoot_x,
+ gint *overshoot_y)
+{
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkAdjustment *vadjustment, *hadjustment;
+ gdouble lower, upper, x, y;
+
+ /* Vertical overshoot */
+ vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
+ lower = gtk_adjustment_get_lower (vadjustment);
+ upper = gtk_adjustment_get_upper (vadjustment) -
+ gtk_adjustment_get_page_size (vadjustment);
+
+ if (priv->unclamped_vadj_value < lower)
+ y = priv->unclamped_vadj_value - lower;
+ else if (priv->unclamped_vadj_value > upper)
+ y = priv->unclamped_vadj_value - upper;
+ else
+ y = 0;
+
+ /* Horizontal overshoot */
+ hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
+ lower = gtk_adjustment_get_lower (hadjustment);
+ upper = gtk_adjustment_get_upper (hadjustment) -
+ gtk_adjustment_get_page_size (hadjustment);
+
+ if (priv->unclamped_hadj_value < lower)
+ x = priv->unclamped_hadj_value - lower;
+ else if (priv->unclamped_hadj_value > upper)
+ x = priv->unclamped_hadj_value - upper;
+ else
+ x = 0;
+
+ if (overshoot_x)
+ *overshoot_x = x;
+
+ if (overshoot_y)
+ *overshoot_y = y;
+
+ return (x != 0 || y != 0);
+}
+
+static void
+_gtk_scrolled_window_allocate_overshoot_window (GtkScrolledWindow *scrolled_window)
+{
+ GtkAllocation window_allocation, relative_allocation, allocation;
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkWidget *widget = GTK_WIDGET (scrolled_window);
+ gint overshoot_x, overshoot_y;
+
+ if (!gtk_widget_get_realized (widget))
+ return;
+
+ gtk_widget_get_allocation (widget, &allocation);
+ gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
+ _gtk_scrolled_window_get_overshoot (scrolled_window,
+ &overshoot_x, &overshoot_y);
+
+ window_allocation = relative_allocation;
+ window_allocation.x += allocation.x;
+ window_allocation.y += allocation.y;
+
+ /* Handle displacement to the left/top by moving the overshoot
+ * window, overshooting to the bottom/right is handled in
+ * gtk_scrolled_window_allocate_child()
+ */
+ if (overshoot_x < 0)
+ window_allocation.x += -overshoot_x;
+
+ if (overshoot_y < 0)
+ window_allocation.y += -overshoot_y;
+
+ window_allocation.width -= ABS (overshoot_x);
+ window_allocation.height -= ABS (overshoot_y);
+
+ gdk_window_move_resize (priv->overshoot_window,
+ window_allocation.x, window_allocation.y,
+ window_allocation.width, window_allocation.height);
+}
+
+static void
+gtk_scrolled_window_allocate_child (GtkScrolledWindow *swindow,
+ GtkAllocation *relative_allocation)
+{
+ GtkWidget *widget = GTK_WIDGET (swindow), *child;
+ GtkAllocation allocation;
+ GtkAllocation child_allocation;
+ gint overshoot_x, overshoot_y;
+
+ child = gtk_bin_get_child (GTK_BIN (widget));
+
+ gtk_widget_get_allocation (widget, &allocation);
+
+ gtk_scrolled_window_relative_allocation (widget, relative_allocation);
+ _gtk_scrolled_window_get_overshoot (swindow, &overshoot_x, &overshoot_y);
+
+ /* Handle overshooting to the right/bottom by relocating the
+ * widget allocation to negative coordinates, so these edges
+ * stick to the overshoot window border.
+ */
+ if (overshoot_x > 0)
+ child_allocation.x = -overshoot_x;
+ else
+ child_allocation.x = 0;
+
+ if (overshoot_y > 0)
+ child_allocation.y = -overshoot_y;
+ else
+ child_allocation.y = 0;
+
+ child_allocation.width = relative_allocation->width;
+ child_allocation.height = relative_allocation->height;
+
+ gtk_widget_size_allocate (child, &child_allocation);
+}
+
+static void
+gtk_scrolled_window_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ GtkScrolledWindow *scrolled_window;
+ GtkScrolledWindowPrivate *priv;
+ GtkStyleContext *context;
+ GtkStateFlags state;
+ GtkBorder padding, border;
+ GtkBin *bin;
+ GtkAllocation relative_allocation;
+ GtkAllocation child_allocation;
+ GtkWidget *child;
+ gboolean scrollbars_within_bevel;
+ gint sb_spacing;
+ gint sb_width;
+ gint sb_height;
+
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
g_return_if_fail (allocation != NULL);
scrolled_window = GTK_SCROLLED_WINDOW (widget);
bin = GTK_BIN (scrolled_window);
+ priv = scrolled_window->priv;
+
+ /* Get possible scrollbar dimensions */
+ sb_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
+ gtk_widget_get_preferred_height (priv->hscrollbar, &sb_height, NULL);
+ gtk_widget_get_preferred_width (priv->vscrollbar, &sb_width, NULL);
+
+ context = gtk_widget_get_style_context (widget);
+ state = gtk_widget_get_state_flags (widget);
+
+ gtk_style_context_save (context);
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
+
+ gtk_style_context_get_padding (context, state, &padding);
+ gtk_style_context_get_border (context, state, &border);
+
+ gtk_widget_style_get (widget, "scrollbars-within-bevel", &scrollbars_within_bevel, NULL);
+
+ gtk_widget_set_allocation (widget, allocation);
+ gtk_style_context_restore (context);
+
+ if (priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
+ priv->hscrollbar_visible = TRUE;
+ else if (priv->hscrollbar_policy == GTK_POLICY_NEVER)
+ priv->hscrollbar_visible = FALSE;
+ if (priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
+ priv->vscrollbar_visible = TRUE;
+ else if (priv->vscrollbar_policy == GTK_POLICY_NEVER)
+ priv->vscrollbar_visible = FALSE;
+
+ child = gtk_bin_get_child (bin);
+ if (child && gtk_widget_get_visible (child))
+ {
+ gint child_scroll_width;
+ gint child_scroll_height;
+ GtkScrollablePolicy hscroll_policy;
+ GtkScrollablePolicy vscroll_policy;
+ gboolean previous_hvis;
+ gboolean previous_vvis;
+ guint count = 0;
+
+ hscroll_policy = GTK_IS_SCROLLABLE (child)
+ ? gtk_scrollable_get_hscroll_policy (GTK_SCROLLABLE (child))
+ : GTK_SCROLL_MINIMUM;
+ vscroll_policy = GTK_IS_SCROLLABLE (child)
+ ? gtk_scrollable_get_vscroll_policy (GTK_SCROLLABLE (child))
+ : GTK_SCROLL_MINIMUM;
+
+ /* Determine scrollbar visibility first via hfw apis */
+ if (gtk_widget_get_request_mode (child) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
+ {
+ if (hscroll_policy == GTK_SCROLL_MINIMUM)
+ gtk_widget_get_preferred_width (child, &child_scroll_width, NULL);
+ else
+ gtk_widget_get_preferred_width (child, NULL, &child_scroll_width);
+
+ if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
+ {
+ /* First try without a vertical scrollbar if the content will fit the height
+ * given the extra width of the scrollbar */
+ if (vscroll_policy == GTK_SCROLL_MINIMUM)
+ gtk_widget_get_preferred_height_for_width (child,
+ MAX (allocation->width, child_scroll_width),
+ &child_scroll_height, NULL);
+ else
+ gtk_widget_get_preferred_height_for_width (child,
+ MAX (allocation->width, child_scroll_width),
+ NULL, &child_scroll_height);
+
+ if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
+ {
+ /* Does the content height fit the allocation height ? */
+ priv->vscrollbar_visible = child_scroll_height > allocation->height;
+
+ /* Does the content width fit the allocation with minus a possible scrollbar ? */
+ priv->hscrollbar_visible =
+ child_scroll_width > allocation->width -
+ (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
+
+ /* Now that we've guessed the hscrollbar, does the content height fit
+ * the possible new allocation height ? */
+ priv->vscrollbar_visible =
+ child_scroll_height > allocation->height -
+ (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
+
+ /* Now that we've guessed the vscrollbar, does the content width fit
+ * the possible new allocation width ? */
+ priv->hscrollbar_visible =
+ child_scroll_width > allocation->width -
+ (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
+ }
+ else /* priv->hscrollbar_policy != GTK_POLICY_AUTOMATIC */
+ {
+ priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
+ priv->vscrollbar_visible = child_scroll_height > allocation->height -
+ (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
+ }
+ }
+ else /* priv->vscrollbar_policy != GTK_POLICY_AUTOMATIC */
+ {
+ priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
+
+ if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
+ priv->hscrollbar_visible =
+ child_scroll_width > allocation->width -
+ (priv->vscrollbar_visible ? 0 : sb_width + sb_spacing);
+ else
+ priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
+ }
+ }
+ else /* GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT */
+ {
+ if (vscroll_policy == GTK_SCROLL_MINIMUM)
+ gtk_widget_get_preferred_height (child, &child_scroll_height, NULL);
+ else
+ gtk_widget_get_preferred_height (child, NULL, &child_scroll_height);
+
+ if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
+ {
+ /* First try without a horizontal scrollbar if the content will fit the width
+ * given the extra height of the scrollbar */
+ if (hscroll_policy == GTK_SCROLL_MINIMUM)
+ gtk_widget_get_preferred_width_for_height (child,
+ MAX (allocation->height, child_scroll_height),
+ &child_scroll_width, NULL);
+ else
+ gtk_widget_get_preferred_width_for_height (child,
+ MAX (allocation->height, child_scroll_height),
+ NULL, &child_scroll_width);
+
+ if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
+ {
+ /* Does the content width fit the allocation width ? */
+ priv->hscrollbar_visible = child_scroll_width > allocation->width;
+
+ /* Does the content height fit the allocation with minus a possible scrollbar ? */
+ priv->vscrollbar_visible =
+ child_scroll_height > allocation->height -
+ (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
+
+ /* Now that we've guessed the vscrollbar, does the content width fit
+ * the possible new allocation width ? */
+ priv->hscrollbar_visible =
+ child_scroll_width > allocation->width -
+ (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
+
+ /* Now that we've guessed the hscrollbar, does the content height fit
+ * the possible new allocation height ? */
+ priv->vscrollbar_visible =
+ child_scroll_height > allocation->height -
+ (priv->hscrollbar_visible ? sb_height + sb_spacing : 0);
+ }
+ else /* priv->vscrollbar_policy != GTK_POLICY_AUTOMATIC */
+ {
+ priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
+ priv->hscrollbar_visible = child_scroll_width > allocation->width -
+ (priv->vscrollbar_visible ? sb_width + sb_spacing : 0);
+ }
+ }
+ else /* priv->hscrollbar_policy != GTK_POLICY_AUTOMATIC */
+ {
+ priv->hscrollbar_visible = priv->hscrollbar_policy != GTK_POLICY_NEVER;
+
+ if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
+ priv->vscrollbar_visible =
+ child_scroll_height > allocation->height -
+ (priv->hscrollbar_visible ? 0 : sb_height + sb_spacing);
+ else
+ priv->vscrollbar_visible = priv->vscrollbar_policy != GTK_POLICY_NEVER;
+ }
+ }
+
+ /* Now after guessing scrollbar visibility; fall back on the allocation loop which
+ * observes the adjustments to detect scrollbar visibility and also avoids
+ * infinite recursion
+ */
+ do
+ {
+ previous_hvis = priv->hscrollbar_visible;
+ previous_vvis = priv->vscrollbar_visible;
+ gtk_scrolled_window_allocate_child (scrolled_window, &relative_allocation);
+
+ /* Explicitly force scrollbar visibility checks.
+ *
+ * Since we make a guess above, the child might not decide to update the adjustments
+ * if they logically did not change since the last configuration
+ */
+ if (priv->hscrollbar)
+ gtk_scrolled_window_adjustment_changed
+ (gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)), scrolled_window);
+
+ if (priv->vscrollbar)
+ gtk_scrolled_window_adjustment_changed
+ (gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)), scrolled_window);
+
+ /* If, after the first iteration, the hscrollbar and the
+ * vscrollbar flip visiblity... or if one of the scrollbars flip
+ * on each itteration indefinitly/infinitely, then we just need both
+ * at this size.
+ */
+ if ((count &&
+ previous_hvis != priv->hscrollbar_visible &&
+ previous_vvis != priv->vscrollbar_visible) || count > 3)
+ {
+ priv->hscrollbar_visible = TRUE;
+ priv->vscrollbar_visible = TRUE;
+
+ gtk_scrolled_window_allocate_child (scrolled_window, &relative_allocation);
+
+ break;
+ }
+
+ count++;
+ }
+ while (previous_hvis != priv->hscrollbar_visible ||
+ previous_vvis != priv->vscrollbar_visible);
+ }
+ else
+ {
+ priv->hscrollbar_visible = priv->hscrollbar_policy == GTK_POLICY_ALWAYS;
+ priv->vscrollbar_visible = priv->vscrollbar_policy == GTK_POLICY_ALWAYS;
+ gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
+ }
+
+ gtk_widget_set_child_visible (priv->hscrollbar, priv->hscrollbar_visible);
+ if (priv->hscrollbar_visible)
+ {
+ child_allocation.x = relative_allocation.x;
+ if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+ priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
+ child_allocation.y = (relative_allocation.y +
+ relative_allocation.height +
+ sb_spacing);
+ else
+ child_allocation.y = relative_allocation.y - sb_spacing - sb_height;
+
+ child_allocation.width = relative_allocation.width;
+ child_allocation.height = sb_height;
+ child_allocation.x += allocation->x;
+ child_allocation.y += allocation->y;
+
+ if (priv->shadow_type != GTK_SHADOW_NONE)
+ {
+ if (!scrollbars_within_bevel)
+ {
+ child_allocation.x -= padding.left + border.left;
+ child_allocation.width += padding.left + padding.right + border.left + border.right;
+
+ if (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+ priv->real_window_placement == GTK_CORNER_TOP_RIGHT)
+ child_allocation.y += padding.bottom + border.bottom;
+ else
+ child_allocation.y -= padding.top + border.top;
+ }
+ }
+
+ gtk_widget_size_allocate (priv->hscrollbar, &child_allocation);
+ }
+
+ gtk_widget_set_child_visible (priv->vscrollbar, priv->vscrollbar_visible);
+ if (priv->vscrollbar_visible)
+ {
+ if ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL &&
+ (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
+ (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
+ (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
+ child_allocation.x = (relative_allocation.x +
+ relative_allocation.width +
+ sb_spacing);
+ else
+ child_allocation.x = relative_allocation.x - sb_spacing - sb_width;
+
+ child_allocation.y = relative_allocation.y;
+ child_allocation.width = sb_width;
+ child_allocation.height = relative_allocation.height;
+ child_allocation.x += allocation->x;
+ child_allocation.y += allocation->y;
+
+ if (priv->shadow_type != GTK_SHADOW_NONE)
+ {
+ if (!scrollbars_within_bevel)
+ {
+ child_allocation.y -= padding.top + border.top;
+ child_allocation.height += padding.top + padding.bottom + border.top + border.bottom;
+
+ if ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL &&
+ (priv->real_window_placement == GTK_CORNER_TOP_RIGHT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
+ (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
+ (priv->real_window_placement == GTK_CORNER_TOP_LEFT ||
+ priv->real_window_placement == GTK_CORNER_BOTTOM_LEFT)))
+ child_allocation.x += padding.right + border.right;
+ else
+ child_allocation.x -= padding.left + border.left;
+ }
+ }
+
+ gtk_widget_size_allocate (priv->vscrollbar, &child_allocation);
+ }
+
+ _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
+}
+
+static gboolean
+gtk_scrolled_window_scroll_event (GtkWidget *widget,
+ GdkEventScroll *event)
+{
+ GtkScrolledWindowPrivate *priv;
+ GtkScrolledWindow *scrolled_window;
+ gboolean handled = FALSE;
+ gdouble delta_x;
+ gdouble delta_y;
+ gdouble delta;
+
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (widget), FALSE);
+ g_return_val_if_fail (event != NULL, FALSE);
+
+ scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ priv = scrolled_window->priv;
+
+ if (gdk_event_get_scroll_deltas ((GdkEvent *) event, &delta_x, &delta_y))
+ {
+ if (delta_x != 0.0 && priv->hscrollbar &&
+ gtk_widget_get_visible (priv->hscrollbar))
+ {
+ GtkAdjustment *adj;
+ gdouble new_value;
+ gdouble page_size;
+ gdouble scroll_unit;
+
+ adj = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
+ page_size = gtk_adjustment_get_page_size (adj);
+ scroll_unit = pow (page_size, 2.0 / 3.0);
+
+ new_value = CLAMP (gtk_adjustment_get_value (adj) + delta_x * scroll_unit,
+ gtk_adjustment_get_lower (adj),
+ gtk_adjustment_get_upper (adj) -
+ gtk_adjustment_get_page_size (adj));
+
+ gtk_adjustment_set_value (adj, new_value);
+
+ handled = TRUE;
+ }
+
+ if (delta_y != 0.0 && priv->vscrollbar &&
+ gtk_widget_get_visible (priv->vscrollbar))
+ {
+ GtkAdjustment *adj;
+ gdouble new_value;
+ gdouble page_size;
+ gdouble scroll_unit;
+
+ adj = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
+ page_size = gtk_adjustment_get_page_size (adj);
+ scroll_unit = pow (page_size, 2.0 / 3.0);
+
+ new_value = CLAMP (gtk_adjustment_get_value (adj) + delta_y * scroll_unit,
+ gtk_adjustment_get_lower (adj),
+ gtk_adjustment_get_upper (adj) -
+ gtk_adjustment_get_page_size (adj));
+
+ gtk_adjustment_set_value (adj, new_value);
+
+ handled = TRUE;
+ }
+ }
+ else
+ {
+ GtkWidget *range;
+
+ if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_DOWN)
+ range = priv->vscrollbar;
+ else
+ range = priv->hscrollbar;
+
+ if (range && gtk_widget_get_visible (range))
+ {
+ GtkAdjustment *adj = gtk_range_get_adjustment (GTK_RANGE (range));
+ gdouble new_value;
+
+ delta = _gtk_range_get_wheel_delta (GTK_RANGE (range), event);
+
+ new_value = CLAMP (gtk_adjustment_get_value (adj) + delta,
+ gtk_adjustment_get_lower (adj),
+ gtk_adjustment_get_upper (adj) -
+ gtk_adjustment_get_page_size (adj));
+
+ gtk_adjustment_set_value (adj, new_value);
+
+ handled = TRUE;
+ }
+ }
+
+ return handled;
+}
+
+static gboolean
+_gtk_scrolled_window_set_adjustment_value (GtkScrolledWindow *scrolled_window,
+ GtkAdjustment *adjustment,
+ gdouble value,
+ gboolean allow_overshooting,
+ gboolean snap_to_border)
+{
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ gdouble lower, upper, *prev_value;
+
+ lower = gtk_adjustment_get_lower (adjustment);
+ upper = gtk_adjustment_get_upper (adjustment) -
+ gtk_adjustment_get_page_size (adjustment);
+
+ if (adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
+ prev_value = &priv->unclamped_hadj_value;
+ else if (adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
+ prev_value = &priv->unclamped_vadj_value;
+ else
+ return FALSE;
+
+ if (snap_to_border)
+ {
+ if (*prev_value < 0 && value > 0)
+ value = 0;
+ else if (*prev_value > upper && value < upper)
+ value = upper;
+ }
+
+ if (allow_overshooting)
+ {
+ lower -= MAX_OVERSHOOT_DISTANCE;
+ upper += MAX_OVERSHOOT_DISTANCE;
+ }
+
+ *prev_value = CLAMP (value, lower, upper);
+ gtk_adjustment_set_value (adjustment, value);
+
+ return (*prev_value != value);
+}
+
+static gboolean
+scrolled_window_deceleration_cb (GtkWidget *widdget,
+ GdkFrameClock *frame_clock,
+ gpointer user_data)
+{
+ KineticScrollData *data = user_data;
+ GtkScrolledWindow *scrolled_window = data->scrolled_window;
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkAdjustment *hadjustment, *vadjustment;
+ gint old_overshoot_x, old_overshoot_y, overshoot_x, overshoot_y;
+ gdouble value;
+ gint64 current_time;
+ guint elapsed;
+
+ hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
+ vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
+
+ _gtk_scrolled_window_get_overshoot (scrolled_window,
+ &old_overshoot_x, &old_overshoot_y);
+
+ current_time = gdk_frame_clock_get_frame_time (frame_clock);
+ elapsed = (current_time - data->last_deceleration_time) / 1000;
+ data->last_deceleration_time = current_time;
+
+ if (hadjustment && priv->hscrollbar_visible)
+ {
+ value = priv->unclamped_hadj_value + (data->x_velocity * elapsed);
+
+ if (_gtk_scrolled_window_set_adjustment_value (scrolled_window,
+ hadjustment,
+ value, TRUE, TRUE))
+ data->x_velocity = 0;
+ }
+ else
+ data->x_velocity = 0;
+
+ if (vadjustment && priv->vscrollbar_visible)
+ {
+ value = priv->unclamped_vadj_value + (data->y_velocity * elapsed);
+
+ if (_gtk_scrolled_window_set_adjustment_value (scrolled_window,
+ vadjustment,
+ value, TRUE, TRUE))
+ data->y_velocity = 0;
+ }
+ else
+ data->y_velocity = 0;
+
+ _gtk_scrolled_window_get_overshoot (scrolled_window,
+ &overshoot_x, &overshoot_y);
+
+ if (overshoot_x == 0)
+ {
+ if (old_overshoot_x != 0)
+ {
+ /* Overshooting finished snapping back */
+ data->x_velocity = 0;
+ }
+ else if (data->x_velocity > 0)
+ {
+ data->x_velocity -= FRICTION_DECELERATION * elapsed * data->vel_sine;
+ data->x_velocity = MAX (0, data->x_velocity);
+ }
+ else if (data->x_velocity < 0)
+ {
+ data->x_velocity += FRICTION_DECELERATION * elapsed * data->vel_sine;
+ data->x_velocity = MIN (0, data->x_velocity);
+ }
+ }
+ else if (overshoot_x < 0)
+ data->x_velocity += OVERSHOOT_INVERSE_ACCELERATION * elapsed;
+ else if (overshoot_x > 0)
+ data->x_velocity -= OVERSHOOT_INVERSE_ACCELERATION * elapsed;
+
+ if (overshoot_y == 0)
+ {
+ if (old_overshoot_y != 0)
+ {
+ /* Overshooting finished snapping back */
+ data->y_velocity = 0;
+ }
+ else if (data->y_velocity > 0)
+ {
+ data->y_velocity -= FRICTION_DECELERATION * elapsed * data->vel_cosine;
+ data->y_velocity = MAX (0, data->y_velocity);
+ }
+ else if (data->y_velocity < 0)
+ {
+ data->y_velocity += FRICTION_DECELERATION * elapsed * data->vel_cosine;
+ data->y_velocity = MIN (0, data->y_velocity);
+ }
+ }
+ else if (overshoot_y < 0)
+ data->y_velocity += OVERSHOOT_INVERSE_ACCELERATION * elapsed;
+ else if (overshoot_y > 0)
+ data->y_velocity -= OVERSHOOT_INVERSE_ACCELERATION * elapsed;
+
+ if (old_overshoot_x != overshoot_x ||
+ old_overshoot_y != overshoot_y)
+ {
+ if (overshoot_x >= 0 || overshoot_y >= 0)
+ {
+ /* We need to reallocate the widget to have it at
+ * negative offset, so there's a "gravity" on the
+ * bottom/right corner
+ */
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
+ }
+ else if (overshoot_x < 0 || overshoot_y < 0)
+ _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
+ }
+
+ if (overshoot_x == 0 && overshoot_y == 0 &&
+ data->x_velocity == 0 && data->y_velocity == 0)
+ gtk_scrolled_window_cancel_deceleration (scrolled_window);
+
+ return G_SOURCE_CONTINUE;
+}
+
+static void
+gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled_window)
+{
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+
+ if (priv->deceleration_id)
+ {
+ gtk_widget_remove_tick_callback (GTK_WIDGET (scrolled_window),
+ priv->deceleration_id);
+ priv->deceleration_id = 0;
+ }
+}
+
+static void
+gtk_scrolled_window_start_deceleration (GtkScrolledWindow *scrolled_window)
+{
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GdkFrameClock *frame_clock;
+ KineticScrollData *data;
+ gdouble angle;
+
+ frame_clock = gtk_widget_get_frame_clock (GTK_WIDGET (scrolled_window));
+
+ data = g_new0 (KineticScrollData, 1);
+ data->scrolled_window = scrolled_window;
+ data->last_deceleration_time = gdk_frame_clock_get_frame_time (frame_clock);
+ data->x_velocity = priv->x_velocity;
+ data->y_velocity = priv->y_velocity;
+
+ /* We use sine/cosine as a factor to deceleration x/y components
+ * of the vector, so we care about the sign later.
+ */
+ angle = atan2 (ABS (data->x_velocity), ABS (data->y_velocity));
+ data->vel_cosine = cos (angle);
+ data->vel_sine = sin (angle);
+
+ scrolled_window->priv->deceleration_id =
+ gtk_widget_add_tick_callback (GTK_WIDGET (scrolled_window),
+ scrolled_window_deceleration_cb,
+ data,
+ (GDestroyNotify) g_free);
+}
+
+static gboolean
+gtk_scrolled_window_release_captured_event (GtkScrolledWindow *scrolled_window)
+{
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+
+ /* Cancel the scrolling and send the button press
+ * event to the child widget
+ */
+ if (!priv->button_press_event)
+ return FALSE;
+
+ if (priv->drag_device)
+ {
+ gtk_device_grab_remove (GTK_WIDGET (scrolled_window), priv->drag_device);
+ priv->drag_device = NULL;
+ }
+
+ if (priv->capture_button_press)
+ {
+ GtkWidget *event_widget;
+
+ event_widget = gtk_get_event_widget (priv->button_press_event);
+
+ if (!_gtk_propagate_captured_event (event_widget,
+ priv->button_press_event,
+ gtk_bin_get_child (GTK_BIN (scrolled_window))))
+ gtk_propagate_event (event_widget, priv->button_press_event);
+
+ gdk_event_free (priv->button_press_event);
+ priv->button_press_event = NULL;
+ }
+
+ if (_gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL))
+ gtk_scrolled_window_start_deceleration (scrolled_window);
+
+ return FALSE;
+}
+
+static gboolean
+gtk_scrolled_window_calculate_velocity (GtkScrolledWindow *scrolled_window,
+ GdkEvent *event)
+{
+ GtkScrolledWindowPrivate *priv;
+ gdouble x_root, y_root;
+ guint32 _time;
+
+#define STILL_THRESHOLD 40
+
+ if (!gdk_event_get_root_coords (event, &x_root, &y_root))
+ return FALSE;
+
+ priv = scrolled_window->priv;
+ _time = gdk_event_get_time (event);
+
+ if (priv->last_motion_event_x_root != x_root ||
+ priv->last_motion_event_y_root != y_root ||
+ ABS (_time - priv->last_motion_event_time) > STILL_THRESHOLD)
+ {
+ priv->x_velocity = (priv->last_motion_event_x_root - x_root) /
+ (gdouble) (_time - priv->last_motion_event_time);
+ priv->y_velocity = (priv->last_motion_event_y_root - y_root) /
+ (gdouble) (_time - priv->last_motion_event_time);
+ }
+
+ priv->last_motion_event_x_root = x_root;
+ priv->last_motion_event_y_root = y_root;
+ priv->last_motion_event_time = _time;
+
+#undef STILL_THRESHOLD
+
+ return TRUE;
+}
+
+static gboolean
+gtk_scrolled_window_captured_button_release (GtkWidget *widget,
+ GdkEvent *event)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkWidget *child;
+ gboolean overshoot;
+ guint button;
+ gdouble x_root, y_root;
+
+ if (gdk_event_get_button (event, &button) && button != 1)
+ return FALSE;
+
+ child = gtk_bin_get_child (GTK_BIN (widget));
+ if (!child)
+ return FALSE;
+
+ gtk_device_grab_remove (widget, priv->drag_device);
+ priv->drag_device = NULL;
+
+ if (priv->release_timeout_id)
+ {
+ g_source_remove (priv->release_timeout_id);
+ priv->release_timeout_id = 0;
+ }
+
+ overshoot = _gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL);
+
+ if (priv->in_drag)
+ gdk_device_ungrab (gdk_event_get_device (event), gdk_event_get_time (event));
+ else
+ {
+ /* There hasn't been scrolling at all, so just let the
+ * child widget handle the button press normally
+ */
+ gtk_scrolled_window_release_captured_event (scrolled_window);
+
+ if (!overshoot)
+ return FALSE;
+ }
+ priv->in_drag = FALSE;
+
+ if (priv->button_press_event)
+ {
+ gdk_event_free (priv->button_press_event);
+ priv->button_press_event = NULL;
+ }
+
+ gtk_scrolled_window_calculate_velocity (scrolled_window, event);
+
+ /* Zero out vector components without a visible scrollbar */
+ if (!priv->hscrollbar_visible)
+ priv->x_velocity = 0;
+ if (!priv->vscrollbar_visible)
+ priv->y_velocity = 0;
+
+ if (priv->x_velocity != 0 || priv->y_velocity != 0 || overshoot)
+ {
+ gtk_scrolled_window_start_deceleration (scrolled_window);
+ priv->x_velocity = priv->y_velocity = 0;
+ priv->last_button_event_valid = FALSE;
+ }
+ else
+ {
+ gdk_event_get_root_coords (event, &x_root, &y_root);
+ priv->last_button_event_x_root = x_root;
+ priv->last_button_event_y_root = y_root;
+ priv->last_button_event_valid = TRUE;
+ }
+
+ if (priv->capture_button_press)
+ return TRUE;
+ else
+ return FALSE;
+}
+
+static gboolean
+gtk_scrolled_window_captured_motion_notify (GtkWidget *widget,
+ GdkEvent *event)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ gint old_overshoot_x, old_overshoot_y;
+ gint new_overshoot_x, new_overshoot_y;
+ GtkWidget *child;
+ GtkAdjustment *hadjustment;
+ GtkAdjustment *vadjustment;
+ gdouble dx, dy;
+ GdkModifierType state;
+ gdouble x_root, y_root;
+
+ gdk_event_get_state (event, &state);
+ if (!(state & GDK_BUTTON1_MASK))
+ return FALSE;
+
+ child = gtk_bin_get_child (GTK_BIN (widget));
+ if (!child)
+ return FALSE;
+
+ /* Check if we've passed the drag threshold */
+ gdk_event_get_root_coords (event, &x_root, &y_root);
+ if (!priv->in_drag)
+ {
+ if (gtk_drag_check_threshold (widget,
+ priv->last_button_event_x_root,
+ priv->last_button_event_y_root,
+ x_root, y_root))
+ {
+ if (priv->release_timeout_id)
+ {
+ g_source_remove (priv->release_timeout_id);
+ priv->release_timeout_id = 0;
+ }
+
+ priv->last_button_event_valid = FALSE;
+ priv->in_drag = TRUE;
+ }
+ else
+ return TRUE;
+ }
+
+ gdk_device_grab (priv->drag_device,
+ gtk_widget_get_window (widget),
+ GDK_OWNERSHIP_WINDOW,
+ TRUE,
+ GDK_BUTTON_RELEASE_MASK | GDK_BUTTON1_MOTION_MASK,
+ NULL,
+ gdk_event_get_time (event));
+
+ priv->last_button_event_valid = FALSE;
+
+ if (priv->button_press_event)
+ {
+ gdk_event_free (priv->button_press_event);
+ priv->button_press_event = NULL;
+ }
- widget->allocation = *allocation;
+ _gtk_scrolled_window_get_overshoot (scrolled_window,
+ &old_overshoot_x, &old_overshoot_y);
- if (scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS)
- scrolled_window->hscrollbar_visible = TRUE;
- if (scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS)
- scrolled_window->vscrollbar_visible = TRUE;
+ hadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
+ if (hadjustment && priv->hscrollbar_visible)
+ {
+ dx = (priv->last_motion_event_x_root - x_root) + priv->unclamped_hadj_value;
+ _gtk_scrolled_window_set_adjustment_value (scrolled_window, hadjustment,
+ dx, TRUE, FALSE);
+ }
- if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
+ vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
+ if (vadjustment && priv->vscrollbar_visible)
{
- gboolean previous_hvis;
- gboolean previous_vvis;
- guint count = 0;
-
- do
- {
- gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
-
- child_allocation.x = relative_allocation.x + allocation->x;
- child_allocation.y = relative_allocation.y + allocation->y;
- child_allocation.width = relative_allocation.width;
- child_allocation.height = relative_allocation.height;
-
- previous_hvis = scrolled_window->hscrollbar_visible;
- previous_vvis = scrolled_window->vscrollbar_visible;
-
- gtk_widget_size_allocate (bin->child, &child_allocation);
+ dy = (priv->last_motion_event_y_root - y_root) + priv->unclamped_vadj_value;
+ _gtk_scrolled_window_set_adjustment_value (scrolled_window, vadjustment,
+ dy, TRUE, FALSE);
+ }
- /* If, after the first iteration, the hscrollbar and the
- * vscrollbar flip visiblity, then we need both.
- */
- if (count &&
- previous_hvis != scrolled_window->hscrollbar_visible &&
- previous_vvis != scrolled_window->vscrollbar_visible)
- {
- scrolled_window->hscrollbar_visible = TRUE;
- scrolled_window->vscrollbar_visible = TRUE;
+ _gtk_scrolled_window_get_overshoot (scrolled_window,
+ &new_overshoot_x, &new_overshoot_y);
- /* a new resize is already queued at this point,
- * so we will immediatedly get reinvoked
- */
- return;
- }
-
- count++;
- }
- while (previous_hvis != scrolled_window->hscrollbar_visible ||
- previous_vvis != scrolled_window->vscrollbar_visible);
- }
- else
- gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
-
- if (scrolled_window->hscrollbar_visible)
+ if (old_overshoot_x != new_overshoot_x ||
+ old_overshoot_y != new_overshoot_y)
{
- if (!GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
- gtk_widget_show (scrolled_window->hscrollbar);
+ if (new_overshoot_x >= 0 || new_overshoot_y >= 0)
+ {
+ /* We need to reallocate the widget to have it at
+ * negative offset, so there's a "gravity" on the
+ * bottom/right corner
+ */
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
+ }
+ else if (new_overshoot_x < 0 || new_overshoot_y < 0)
+ _gtk_scrolled_window_allocate_overshoot_window (scrolled_window);
+ }
- child_allocation.x = relative_allocation.x;
- if (scrolled_window->window_placement == GTK_CORNER_TOP_LEFT ||
- scrolled_window->window_placement == GTK_CORNER_TOP_RIGHT)
- child_allocation.y = (relative_allocation.y +
- relative_allocation.height +
- SCROLLBAR_SPACING (scrolled_window));
- else
- child_allocation.y = GTK_CONTAINER (scrolled_window)->border_width;
+ gtk_scrolled_window_calculate_velocity (scrolled_window, event);
- child_allocation.width = relative_allocation.width;
- child_allocation.height = scrolled_window->hscrollbar->requisition.height;
- child_allocation.x += allocation->x;
- child_allocation.y += allocation->y;
+ return TRUE;
+}
- gtk_widget_size_allocate (scrolled_window->hscrollbar, &child_allocation);
+static gboolean
+gtk_scrolled_window_captured_button_press (GtkWidget *widget,
+ GdkEvent *event)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkWidget *child;
+ GtkWidget *event_widget;
+ GdkDevice *source_device;
+ GdkInputSource source;
+ gdouble x_root, y_root;
+ guint button;
+
+ /* If scrollbars are not visible, we don't do kinetic scrolling */
+ if (!priv->vscrollbar_visible && !priv->hscrollbar_visible)
+ return FALSE;
+
+ source_device = gdk_event_get_source_device (event);
+ source = gdk_device_get_source (source_device);
+
+ if (source != GDK_SOURCE_TOUCHSCREEN)
+ return FALSE;
+
+ event_widget = gtk_get_event_widget (event);
+
+ /* If there's another scrolled window between the widget
+ * receiving the event and this capturing scrolled window,
+ * let it handle the events.
+ */
+ if (widget != gtk_widget_get_ancestor (event_widget, GTK_TYPE_SCROLLED_WINDOW))
+ return FALSE;
+
+ /* Check whether the button press is close to the previous one,
+ * take that as a shortcut to get the child widget handle events
+ */
+ gdk_event_get_root_coords (event, &x_root, &y_root);
+ if (priv->last_button_event_valid &&
+ ABS (x_root - priv->last_button_event_x_root) < TOUCH_BYPASS_CAPTURED_THRESHOLD &&
+ ABS (y_root - priv->last_button_event_y_root) < TOUCH_BYPASS_CAPTURED_THRESHOLD)
+ {
+ priv->last_button_event_valid = FALSE;
+ return FALSE;
}
- else if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
- gtk_widget_hide (scrolled_window->hscrollbar);
- if (scrolled_window->vscrollbar_visible)
+ priv->last_button_event_x_root = priv->last_motion_event_x_root = x_root;
+ priv->last_button_event_y_root = priv->last_motion_event_y_root = y_root;
+ priv->last_motion_event_time = gdk_event_get_time (event);
+ priv->last_button_event_valid = TRUE;
+
+ if (gdk_event_get_button (event, &button) && button != 1)
+ return FALSE;
+
+ child = gtk_bin_get_child (GTK_BIN (widget));
+ if (!child)
+ return FALSE;
+
+ if (priv->hscrollbar == event_widget || priv->vscrollbar == event_widget)
+ return FALSE;
+
+ priv->drag_device = gdk_event_get_device (event);
+ gtk_device_grab_add (widget, priv->drag_device, TRUE);
+
+ gtk_scrolled_window_cancel_deceleration (scrolled_window);
+
+ /* Only set the timeout if we're going to store an event */
+ if (priv->capture_button_press)
+ priv->release_timeout_id =
+ gdk_threads_add_timeout (RELEASE_EVENT_TIMEOUT,
+ (GSourceFunc) gtk_scrolled_window_release_captured_event,
+ scrolled_window);
+
+ priv->in_drag = FALSE;
+
+ if (priv->capture_button_press)
{
- if (!GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
- gtk_widget_show (scrolled_window->vscrollbar);
+ /* Store the button press event in
+ * case we need to propagate it later
+ */
+ priv->button_press_event = gdk_event_copy (event);
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
- if (scrolled_window->window_placement == GTK_CORNER_TOP_LEFT ||
- scrolled_window->window_placement == GTK_CORNER_BOTTOM_LEFT)
- child_allocation.x = (relative_allocation.x +
- relative_allocation.width +
- SCROLLBAR_SPACING (scrolled_window));
- else
- child_allocation.x = GTK_CONTAINER (scrolled_window)->border_width;
+static gboolean
+gtk_scrolled_window_captured_event (GtkWidget *widget,
+ GdkEvent *event)
+{
+ gboolean retval = FALSE;
+ GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW (widget)->priv;
- child_allocation.y = relative_allocation.y;
- child_allocation.width = scrolled_window->vscrollbar->requisition.width;
- child_allocation.height = relative_allocation.height;
- child_allocation.x += allocation->x;
- child_allocation.y += allocation->y;
+ if (gdk_window_get_window_type (event->any.window) == GDK_WINDOW_TEMP)
+ return FALSE;
- gtk_widget_size_allocate (scrolled_window->vscrollbar, &child_allocation);
+ switch (event->type)
+ {
+ case GDK_TOUCH_BEGIN:
+ case GDK_BUTTON_PRESS:
+ retval = gtk_scrolled_window_captured_button_press (widget, event);
+ break;
+ case GDK_TOUCH_END:
+ case GDK_BUTTON_RELEASE:
+ if (priv->drag_device)
+ retval = gtk_scrolled_window_captured_button_release (widget, event);
+ else
+ priv->last_button_event_valid = FALSE;
+ break;
+ case GDK_TOUCH_UPDATE:
+ case GDK_MOTION_NOTIFY:
+ if (priv->drag_device)
+ retval = gtk_scrolled_window_captured_motion_notify (widget, event);
+ break;
+ case GDK_LEAVE_NOTIFY:
+ case GDK_ENTER_NOTIFY:
+ if (priv->in_drag &&
+ event->crossing.mode != GDK_CROSSING_GRAB)
+ retval = TRUE;
+ break;
+ default:
+ break;
}
- else if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
- gtk_widget_hide (scrolled_window->vscrollbar);
+
+ return retval;
}
+static gboolean
+gtk_scrolled_window_focus (GtkWidget *widget,
+ GtkDirectionType direction)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkWidget *child;
+ gboolean had_focus_child;
+
+ had_focus_child = gtk_container_get_focus_child (GTK_CONTAINER (widget)) != NULL;
+
+ if (priv->focus_out)
+ {
+ priv->focus_out = FALSE; /* Clear this to catch the wrap-around case */
+ return FALSE;
+ }
+
+ if (gtk_widget_is_focus (widget))
+ return FALSE;
+
+ /* We only put the scrolled window itself in the focus chain if it
+ * isn't possible to focus any children.
+ */
+ child = gtk_bin_get_child (GTK_BIN (widget));
+ if (child)
+ {
+ if (gtk_widget_child_focus (child, direction))
+ return TRUE;
+ }
+
+ if (!had_focus_child && gtk_widget_get_can_focus (widget))
+ {
+ gtk_widget_grab_focus (widget);
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
static void
gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
gpointer data)
{
- GtkScrolledWindow *scrolled_win;
+ GtkScrolledWindowPrivate *priv;
+ GtkScrolledWindow *scrolled_window;
g_return_if_fail (adjustment != NULL);
g_return_if_fail (data != NULL);
- scrolled_win = GTK_SCROLLED_WINDOW (data);
+ scrolled_window = GTK_SCROLLED_WINDOW (data);
+ priv = scrolled_window->priv;
- if (adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->hscrollbar)))
+ if (priv->hscrollbar &&
+ adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
{
- if (scrolled_win->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
+ if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
{
gboolean visible;
-
- visible = scrolled_win->hscrollbar_visible;
- scrolled_win->hscrollbar_visible = (adjustment->upper - adjustment->lower >
- adjustment->page_size);
- if (scrolled_win->hscrollbar_visible != visible)
- gtk_widget_queue_resize (GTK_WIDGET (scrolled_win));
+
+ visible = priv->hscrollbar_visible;
+ priv->hscrollbar_visible = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment) >
+ gtk_adjustment_get_page_size (adjustment));
+
+ if (priv->hscrollbar_visible != visible)
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
}
}
- else if (adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->vscrollbar)))
+ else if (priv->vscrollbar &&
+ adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
{
- if (scrolled_win->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
+ if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
{
gboolean visible;
- visible = scrolled_win->vscrollbar_visible;
- scrolled_win->vscrollbar_visible = (adjustment->upper - adjustment->lower >
- adjustment->page_size);
- if (scrolled_win->vscrollbar_visible != visible)
- gtk_widget_queue_resize (GTK_WIDGET (scrolled_win));
+ visible = priv->vscrollbar_visible;
+ priv->vscrollbar_visible = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment) >
+ gtk_adjustment_get_page_size (adjustment));
+
+ if (priv->vscrollbar_visible != visible)
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
}
}
}
+static void
+gtk_scrolled_window_adjustment_value_changed (GtkAdjustment *adjustment,
+ gpointer user_data)
+{
+ GtkScrolledWindow *scrolled_window = user_data;
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+
+ /* Allow overshooting for kinetic scrolling operations */
+ if (priv->drag_device || priv->deceleration_id)
+ return;
+
+ /* Ensure GtkAdjustment and unclamped values are in sync */
+ if (priv->vscrollbar &&
+ adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
+ priv->unclamped_vadj_value = gtk_adjustment_get_value (adjustment);
+ else if (priv->hscrollbar &&
+ adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
+ priv->unclamped_hadj_value = gtk_adjustment_get_value (adjustment);
+}
+
static void
gtk_scrolled_window_add (GtkContainer *container,
- GtkWidget *child)
+ GtkWidget *child)
{
+ GtkScrolledWindowPrivate *priv;
GtkScrolledWindow *scrolled_window;
GtkBin *bin;
+ GtkWidget *child_widget, *scrollable_child;
+ GtkAdjustment *hadj, *vadj;
bin = GTK_BIN (container);
- g_return_if_fail (bin->child == NULL);
+ child_widget = gtk_bin_get_child (bin);
+ g_return_if_fail (child_widget == NULL);
scrolled_window = GTK_SCROLLED_WINDOW (container);
+ priv = scrolled_window->priv;
- gtk_widget_set_parent (child, GTK_WIDGET (bin));
- bin->child = child;
+ if (GTK_IS_SCROLLABLE (child))
+ {
+ scrollable_child = child;
+ }
+ else
+ {
+ scrollable_child = gtk_viewport_new (NULL, NULL);
+ gtk_widget_show (scrollable_child);
+ gtk_container_add (GTK_CONTAINER (scrollable_child), child);
+ }
- /* this is a temporary message */
- if (!gtk_widget_scroll_adjustements (child,
- gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)),
- gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar))))
- g_message ("gtk_scrolled_window_add(): cannot add non scrollable widget "
- "use gtk_scrolled_window_add_with_viewport() instead");
+ if (gtk_widget_get_realized (GTK_WIDGET (bin)))
+ gtk_widget_set_parent_window (scrollable_child, priv->overshoot_window);
- if (GTK_WIDGET_VISIBLE (child->parent))
- {
- if (GTK_WIDGET_REALIZED (child->parent) &&
- !GTK_WIDGET_REALIZED (child))
- gtk_widget_realize (child);
+ _gtk_bin_set_child (bin, scrollable_child);
+ gtk_widget_set_parent (scrollable_child, GTK_WIDGET (bin));
- if (GTK_WIDGET_MAPPED (child->parent) &&
- !GTK_WIDGET_MAPPED (child))
- gtk_widget_map (child);
- }
+ hadj = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
+ vadj = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
- if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (container))
- gtk_widget_queue_resize (child);
+ g_object_set (scrollable_child, "hadjustment", hadj, "vadjustment", vadj, NULL);
}
static void
gtk_scrolled_window_remove (GtkContainer *container,
GtkWidget *child)
{
- g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
g_return_if_fail (child != NULL);
- g_return_if_fail (GTK_BIN (container)->child == child);
-
- gtk_widget_scroll_adjustements (child, NULL, NULL);
+ g_return_if_fail (gtk_bin_get_child (GTK_BIN (container)) == child);
+
+ g_object_set (child, "hadjustment", NULL, "vadjustment", NULL, NULL);
/* chain parent class handler to remove child */
- GTK_CONTAINER_CLASS (parent_class)->remove (container, child);
+ GTK_CONTAINER_CLASS (gtk_scrolled_window_parent_class)->remove (container, child);
}
+/**
+ * gtk_scrolled_window_add_with_viewport:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @child: the widget you want to scroll
+ *
+ * Used to add children without native scrolling capabilities. This
+ * is simply a convenience function; it is equivalent to adding the
+ * unscrollable child to a viewport, then adding the viewport to the
+ * scrolled window. If a child has native scrolling, use
+ * gtk_container_add() instead of this function.
+ *
+ * The viewport scrolls the child by moving its #GdkWindow, and takes
+ * the size of the child to be the size of its toplevel #GdkWindow.
+ * This will be very wrong for most widgets that support native scrolling;
+ * for example, if you add a widget such as #GtkTreeView with a viewport,
+ * the whole widget will scroll, including the column headings. Thus,
+ * widgets with native scrolling support should not be used with the
+ * #GtkViewport proxy.
+ *
+ * A widget supports scrolling natively if it implements the
+ * #GtkScrollable interface.
+ *
+ * Deprecated: 3.8: gtk_container_add() will now automatically add
+ * a #GtkViewport if the child doesn't implement #GtkScrollable.
+ */
void
gtk_scrolled_window_add_with_viewport (GtkScrolledWindow *scrolled_window,
GtkWidget *child)
{
GtkBin *bin;
GtkWidget *viewport;
+ GtkWidget *child_widget;
- g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
- g_return_if_fail (child != NULL);
g_return_if_fail (GTK_IS_WIDGET (child));
- g_return_if_fail (child->parent == NULL);
+ g_return_if_fail (gtk_widget_get_parent (child) == NULL);
bin = GTK_BIN (scrolled_window);
+ child_widget = gtk_bin_get_child (bin);
- if (bin->child != NULL)
+ if (child_widget)
{
- g_return_if_fail (GTK_IS_VIEWPORT (bin->child));
- g_return_if_fail (GTK_BIN (bin->child)->child == NULL);
+ g_return_if_fail (GTK_IS_VIEWPORT (child_widget));
+ g_return_if_fail (gtk_bin_get_child (GTK_BIN (child_widget)) == NULL);
- viewport = bin->child;
+ viewport = child_widget;
}
else
{
viewport =
gtk_viewport_new (gtk_scrolled_window_get_hadjustment (scrolled_window),
- gtk_scrolled_window_get_vadjustment (scrolled_window));
+ gtk_scrolled_window_get_vadjustment (scrolled_window));
gtk_container_add (GTK_CONTAINER (scrolled_window), viewport);
}
gtk_widget_show (viewport);
gtk_container_add (GTK_CONTAINER (viewport), child);
}
+
+/*
+ * _gtk_scrolled_window_get_spacing:
+ * @scrolled_window: a scrolled window
+ *
+ * Gets the spacing between the scrolled window's scrollbars and
+ * the scrolled widget. Used by GtkCombo
+ *
+ * Return value: the spacing, in pixels.
+ */
+gint
+_gtk_scrolled_window_get_scrollbar_spacing (GtkScrolledWindow *scrolled_window)
+{
+ GtkScrolledWindowClass *class;
+
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
+
+ class = GTK_SCROLLED_WINDOW_GET_CLASS (scrolled_window);
+
+ if (class->scrollbar_spacing >= 0)
+ return class->scrollbar_spacing;
+ else
+ {
+ gint scrollbar_spacing;
+
+ gtk_widget_style_get (GTK_WIDGET (scrolled_window),
+ "scrollbar-spacing", &scrollbar_spacing,
+ NULL);
+
+ return scrollbar_spacing;
+ }
+}
+
+
+static void
+gtk_scrolled_window_get_preferred_size (GtkWidget *widget,
+ GtkOrientation orientation,
+ gint *minimum_size,
+ gint *natural_size)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+ GtkBin *bin = GTK_BIN (scrolled_window);
+ gint extra_width;
+ gint extra_height;
+ gint scrollbar_spacing;
+ GtkRequisition hscrollbar_requisition;
+ GtkRequisition vscrollbar_requisition;
+ GtkRequisition minimum_req, natural_req;
+ GtkWidget *child;
+ gint min_child_size, nat_child_size;
+
+ scrollbar_spacing = _gtk_scrolled_window_get_scrollbar_spacing (scrolled_window);
+
+ extra_width = 0;
+ extra_height = 0;
+ minimum_req.width = 0;
+ minimum_req.height = 0;
+ natural_req.width = 0;
+ natural_req.height = 0;
+
+ gtk_widget_get_preferred_size (priv->hscrollbar,
+ &hscrollbar_requisition, NULL);
+ gtk_widget_get_preferred_size (priv->vscrollbar,
+ &vscrollbar_requisition, NULL);
+
+ child = gtk_bin_get_child (bin);
+ if (child && gtk_widget_get_visible (child))
+ {
+ if (orientation == GTK_ORIENTATION_HORIZONTAL)
+ {
+ gtk_widget_get_preferred_width (child,
+ &min_child_size,
+ &nat_child_size);
+
+ if (priv->hscrollbar_policy == GTK_POLICY_NEVER)
+ {
+ minimum_req.width += min_child_size;
+ natural_req.width += nat_child_size;
+ }
+ else
+ {
+ gint min_content_width = priv->min_content_width;
+
+ if (min_content_width >= 0)
+ {
+ minimum_req.width = MAX (minimum_req.width, min_content_width);
+ natural_req.width = MAX (natural_req.width, min_content_width);
+ extra_width = -1;
+ }
+ else
+ {
+ minimum_req.width += vscrollbar_requisition.width;
+ natural_req.width += vscrollbar_requisition.width;
+ }
+ }
+ }
+ else /* GTK_ORIENTATION_VERTICAL */
+ {
+ gtk_widget_get_preferred_height (child,
+ &min_child_size,
+ &nat_child_size);
+
+ if (priv->vscrollbar_policy == GTK_POLICY_NEVER)
+ {
+ minimum_req.height += min_child_size;
+ natural_req.height += nat_child_size;
+ }
+ else
+ {
+ gint min_content_height = priv->min_content_height;
+
+ if (min_content_height >= 0)
+ {
+ minimum_req.height = MAX (minimum_req.height, min_content_height);
+ natural_req.height = MAX (natural_req.height, min_content_height);
+ extra_height = -1;
+ }
+ else
+ {
+ minimum_req.height += vscrollbar_requisition.height;
+ natural_req.height += vscrollbar_requisition.height;
+ }
+ }
+ }
+ }
+
+ if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC ||
+ priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
+ {
+ minimum_req.width = MAX (minimum_req.width, hscrollbar_requisition.width);
+ natural_req.width = MAX (natural_req.width, hscrollbar_requisition.width);
+ if (!extra_height || priv->hscrollbar_policy == GTK_POLICY_ALWAYS)
+ extra_height = scrollbar_spacing + hscrollbar_requisition.height;
+ }
+
+ if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC ||
+ priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
+ {
+ minimum_req.height = MAX (minimum_req.height, vscrollbar_requisition.height);
+ natural_req.height = MAX (natural_req.height, vscrollbar_requisition.height);
+ if (!extra_width || priv->vscrollbar_policy == GTK_POLICY_ALWAYS)
+ extra_width = scrollbar_spacing + vscrollbar_requisition.width;
+ }
+
+ minimum_req.width += MAX (0, extra_width);
+ minimum_req.height += MAX (0, extra_height);
+ natural_req.width += MAX (0, extra_width);
+ natural_req.height += MAX (0, extra_height);
+
+ if (priv->shadow_type != GTK_SHADOW_NONE)
+ {
+ GtkStyleContext *context;
+ GtkStateFlags state;
+ GtkBorder padding, border;
+
+ context = gtk_widget_get_style_context (GTK_WIDGET (widget));
+ state = gtk_widget_get_state_flags (GTK_WIDGET (widget));
+
+ gtk_style_context_save (context);
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_FRAME);
+
+ gtk_style_context_get_padding (context, state, &padding);
+ gtk_style_context_get_border (context, state, &border);
+
+ minimum_req.width += padding.left + padding.right + border.left + border.right;
+ minimum_req.height += padding.top + padding.bottom + border.top + border.bottom;
+ natural_req.width += padding.left + padding.right + border.left + border.right;
+ natural_req.height += padding.top + padding.bottom + border.top + border.bottom;
+
+ gtk_style_context_restore (context);
+ }
+
+ if (orientation == GTK_ORIENTATION_HORIZONTAL)
+ {
+ if (minimum_size)
+ *minimum_size = minimum_req.width;
+ if (natural_size)
+ *natural_size = natural_req.width;
+ }
+ else
+ {
+ if (minimum_size)
+ *minimum_size = minimum_req.height;
+ if (natural_size)
+ *natural_size = natural_req.height;
+ }
+}
+
+static void
+gtk_scrolled_window_get_preferred_width (GtkWidget *widget,
+ gint *minimum_size,
+ gint *natural_size)
+{
+ gtk_scrolled_window_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size);
+}
+
+static void
+gtk_scrolled_window_get_preferred_height (GtkWidget *widget,
+ gint *minimum_size,
+ gint *natural_size)
+{
+ gtk_scrolled_window_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size);
+}
+
+static void
+gtk_scrolled_window_get_preferred_height_for_width (GtkWidget *widget,
+ gint width,
+ gint *minimum_height,
+ gint *natural_height)
+{
+ g_return_if_fail (GTK_IS_WIDGET (widget));
+
+ GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, minimum_height, natural_height);
+}
+
+static void
+gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *widget,
+ gint height,
+ gint *minimum_width,
+ gint *natural_width)
+{
+ g_return_if_fail (GTK_IS_WIDGET (widget));
+
+ GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
+}
+
+static void
+gtk_scrolled_window_realize (GtkWidget *widget)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkAllocation allocation, relative_allocation;
+ GdkWindowAttr attributes;
+ GtkWidget *child_widget;
+ gint attributes_mask;
+
+ gtk_widget_set_realized (widget, TRUE);
+ gtk_widget_get_allocation (widget, &allocation);
+ gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
+
+ attributes.window_type = GDK_WINDOW_CHILD;
+ attributes.x = allocation.x + relative_allocation.x;
+ attributes.y = allocation.y + relative_allocation.y;
+ attributes.width = allocation.width;
+ attributes.height = allocation.height;
+ attributes.wclass = GDK_INPUT_OUTPUT;
+ attributes.visual = gtk_widget_get_visual (widget);
+ attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK |
+ GDK_BUTTON_MOTION_MASK | GDK_TOUCH_MASK | GDK_EXPOSURE_MASK;
+
+ attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
+
+ scrolled_window->priv->overshoot_window =
+ gdk_window_new (gtk_widget_get_parent_window (widget),
+ &attributes, attributes_mask);
+ gtk_widget_register_window (widget, scrolled_window->priv->overshoot_window);
+
+ child_widget = gtk_bin_get_child (GTK_BIN (widget));
+
+ if (child_widget)
+ gtk_widget_set_parent_window (child_widget,
+ scrolled_window->priv->overshoot_window);
+
+ GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->realize (widget);
+}
+
+static void
+gtk_scrolled_window_unrealize (GtkWidget *widget)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+
+ gtk_widget_unregister_window (widget, scrolled_window->priv->overshoot_window);
+ gdk_window_destroy (scrolled_window->priv->overshoot_window);
+ scrolled_window->priv->overshoot_window = NULL;
+
+ gtk_widget_set_realized (widget, FALSE);
+
+ GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->unrealize (widget);
+}
+
+static void
+gtk_scrolled_window_map (GtkWidget *widget)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+
+ gdk_window_show (scrolled_window->priv->overshoot_window);
+
+ GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->map (widget);
+}
+
+static void
+gtk_scrolled_window_unmap (GtkWidget *widget)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+
+ gdk_window_hide (scrolled_window->priv->overshoot_window);
+
+ GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->unmap (widget);
+}
+
+static void
+gtk_scrolled_window_grab_notify (GtkWidget *widget,
+ gboolean was_grabbed)
+{
+ GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
+ GtkScrolledWindowPrivate *priv = scrolled_window->priv;
+
+ if (priv->drag_device &&
+ gtk_widget_device_is_shadowed (widget,
+ priv->drag_device))
+ {
+ gdk_device_ungrab (priv->drag_device,
+ gtk_get_current_event_time ());
+ priv->drag_device = NULL;
+ priv->in_drag = FALSE;
+
+ if (priv->release_timeout_id)
+ {
+ g_source_remove (priv->release_timeout_id);
+ priv->release_timeout_id = 0;
+ }
+
+ if (_gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL))
+ gtk_scrolled_window_start_deceleration (scrolled_window);
+ else
+ gtk_scrolled_window_cancel_deceleration (scrolled_window);
+
+ priv->last_button_event_valid = FALSE;
+ }
+}
+
+/**
+ * gtk_scrolled_window_get_min_content_width:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Gets the minimum content width of @scrolled_window, or -1 if not set.
+ *
+ * Returns: the minimum content width
+ *
+ * Since: 3.0
+ */
+gint
+gtk_scrolled_window_get_min_content_width (GtkScrolledWindow *scrolled_window)
+{
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
+
+ return scrolled_window->priv->min_content_width;
+}
+
+/**
+ * gtk_scrolled_window_set_min_content_width:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @width: the minimal content width
+ *
+ * Sets the minimum width that @scrolled_window should keep visible.
+ * Note that this can and (usually will) be smaller than the minimum
+ * size of the content.
+ *
+ * Since: 3.0
+ */
+void
+gtk_scrolled_window_set_min_content_width (GtkScrolledWindow *scrolled_window,
+ gint width)
+{
+ GtkScrolledWindowPrivate *priv;
+
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
+
+ priv = scrolled_window->priv;
+
+ if (priv->min_content_width != width)
+ {
+ priv->min_content_width = width;
+
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
+
+ g_object_notify (G_OBJECT (scrolled_window), "min-content-width");
+ }
+}
+
+/**
+ * gtk_scrolled_window_get_min_content_height:
+ * @scrolled_window: a #GtkScrolledWindow
+ *
+ * Gets the minimal content height of @scrolled_window, or -1 if not set.
+ *
+ * Returns: the minimal content height
+ *
+ * Since: 3.0
+ */
+gint
+gtk_scrolled_window_get_min_content_height (GtkScrolledWindow *scrolled_window)
+{
+ g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), 0);
+
+ return scrolled_window->priv->min_content_height;
+}
+
+/**
+ * gtk_scrolled_window_set_min_content_height:
+ * @scrolled_window: a #GtkScrolledWindow
+ * @height: the minimal content height
+ *
+ * Sets the minimum height that @scrolled_window should keep visible.
+ * Note that this can and (usually will) be smaller than the minimum
+ * size of the content.
+ *
+ * Since: 3.0
+ */
+void
+gtk_scrolled_window_set_min_content_height (GtkScrolledWindow *scrolled_window,
+ gint height)
+{
+ GtkScrolledWindowPrivate *priv;
+
+ g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
+
+ priv = scrolled_window->priv;
+
+ if (priv->min_content_height != height)
+ {
+ priv->min_content_height = height;
+
+ gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
+
+ g_object_notify (G_OBJECT (scrolled_window), "min-content-height");
+ }
+}
projects / ~andy / gtk / blobdiff