forked from AuroraMiddleware/gtk
3466 lines
117 KiB
C
3466 lines
117 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gtkscrolledwindow.h"
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#include "gtkadjustment.h"
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#include "gtkbindings.h"
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#include "gtkdnd.h"
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#include "gtkintl.h"
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#include "gtkmain.h"
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#include "gtkmarshalers.h"
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#include "gtkprivate.h"
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#include "gtkscrollable.h"
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#include "gtkscrollbar.h"
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#include "gtktypebuiltins.h"
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#include "gtkviewport.h"
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#include "gtkwidgetprivate.h"
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#include "gtkwindow.h"
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#include "a11y/gtkscrolledwindowaccessible.h"
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#include <math.h>
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/**
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* SECTION:gtkscrolledwindow
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* @Short_description: Adds scrollbars to its child widget
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* @Title: GtkScrolledWindow
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* @See_also: #GtkScrollable, #GtkViewport, #GtkAdjustment
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*
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* #GtkScrolledWindow is a #GtkBin subclass: it’s a container
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* the accepts a single child widget. #GtkScrolledWindow adds scrollbars
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* to the child widget and optionally draws a beveled frame around the
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* child widget.
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*
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* The scrolled window can work in two ways. Some widgets have native
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* scrolling support; these widgets implement the #GtkScrollable interface.
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* Widgets with native scroll support include #GtkTreeView, #GtkTextView,
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* and #GtkLayout.
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*
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* For widgets that lack native scrolling support, the #GtkViewport
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* widget acts as an adaptor class, implementing scrollability for child
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* widgets that lack their own scrolling capabilities. Use #GtkViewport
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* to scroll child widgets such as #GtkGrid, #GtkBox, and so on.
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*
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* If a widget has native scrolling abilities, it can be added to the
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* #GtkScrolledWindow with gtk_container_add(). If a widget does not, you
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* must first add the widget to a #GtkViewport, then add the #GtkViewport
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* to the scrolled window. gtk_container_add() will do this for you for
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* widgets that don’t implement #GtkScrollable natively, so you can
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* ignore the presence of the viewport.
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*
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* The position of the scrollbars is controlled by the scroll
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* adjustments. See #GtkAdjustment for the fields in an adjustment - for
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* #GtkScrollbar, used by #GtkScrolledWindow, the “value” field
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* represents the position of the scrollbar, which must be between the
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* “lower” field and “upper - page_size.” The “page_size” field
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* represents the size of the visible scrollable area. The
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* “step_increment” and “page_increment” fields are used when the user
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* asks to step down (using the small stepper arrows) or page down (using
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* for example the PageDown key).
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*
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* If a #GtkScrolledWindow doesn’t behave quite as you would like, or
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* doesn’t have exactly the right layout, it’s very possible to set up
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* your own scrolling with #GtkScrollbar and for example a #GtkGrid.
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*/
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/* scrolled window policy and size requisition handling:
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*
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* gtk size requisition works as follows:
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* a widget upon size-request reports the width and height that it finds
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* to be best suited to display its contents, including children.
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* the width and/or height reported from a widget upon size requisition
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* may be overidden by the user by specifying a width and/or height
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* other than 0 through gtk_widget_set_size_request().
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*
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* a scrolled window needs (for implementing all three policy types) to
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* request its width and height based on two different rationales.
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* 1) the user wants the scrolled window to just fit into the space
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* that it gets allocated for a specifc dimension.
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* 1.1) this does not apply if the user specified a concrete value
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* value for that specific dimension by either specifying usize for the
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* scrolled window or for its child.
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* 2) the user wants the scrolled window to take as much space up as
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* is desired by the child for a specifc dimension (i.e. POLICY_NEVER).
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*
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* also, kinda obvious:
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* 3) a user would certainly not have choosen a scrolled window as a container
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* for the child, if the resulting allocation takes up more space than the
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* child would have allocated without the scrolled window.
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*
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* conclusions:
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* A) from 1) follows: the scrolled window shouldn’t request more space for a
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* specifc dimension than is required at minimum.
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* B) from 1.1) follows: the requisition may be overidden by usize of the scrolled
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* window (done automatically) or by usize of the child (needs to be checked).
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* C) from 2) follows: for POLICY_NEVER, the scrolled window simply reports the
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* child’s dimension.
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* D) from 3) follows: the scrolled window child’s minimum width and minimum height
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* under A) at least correspond to the space taken up by its scrollbars.
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*/
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#define DEFAULT_SCROLLBAR_SPACING 3
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#define TOUCH_BYPASS_CAPTURED_THRESHOLD 30
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/* Kinetic scrolling */
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#define MAX_OVERSHOOT_DISTANCE 50
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#define FRICTION_DECELERATION 0.003
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#define OVERSHOOT_INVERSE_ACCELERATION 0.003
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#define RELEASE_EVENT_TIMEOUT 1000
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struct _GtkScrolledWindowPrivate
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{
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GtkWidget *hscrollbar;
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GtkWidget *vscrollbar;
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GtkCornerType window_placement;
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guint16 shadow_type;
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guint hscrollbar_policy : 2;
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guint vscrollbar_policy : 2;
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guint hscrollbar_visible : 1;
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guint vscrollbar_visible : 1;
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guint focus_out : 1; /* Flag used by ::move-focus-out implementation */
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gint min_content_width;
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gint min_content_height;
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/* Kinetic scrolling */
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GdkEvent *button_press_event;
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GdkWindow *overshoot_window;
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GdkDevice *drag_device;
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guint kinetic_scrolling : 1;
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guint capture_button_press : 1;
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guint in_drag : 1;
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guint last_button_event_valid : 1;
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guint release_timeout_id;
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guint deceleration_id;
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gdouble last_button_event_x_root;
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gdouble last_button_event_y_root;
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gdouble last_motion_event_x_root;
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gdouble last_motion_event_y_root;
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guint32 last_motion_event_time;
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gdouble x_velocity;
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gdouble y_velocity;
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gdouble unclamped_hadj_value;
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gdouble unclamped_vadj_value;
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};
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typedef struct
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{
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GtkScrolledWindow *scrolled_window;
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gint64 last_deceleration_time;
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gdouble x_velocity;
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gdouble y_velocity;
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gdouble vel_cosine;
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gdouble vel_sine;
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} KineticScrollData;
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enum {
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PROP_0,
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PROP_HADJUSTMENT,
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PROP_VADJUSTMENT,
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PROP_HSCROLLBAR_POLICY,
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PROP_VSCROLLBAR_POLICY,
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PROP_WINDOW_PLACEMENT,
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PROP_WINDOW_PLACEMENT_SET,
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PROP_SHADOW_TYPE,
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PROP_MIN_CONTENT_WIDTH,
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PROP_MIN_CONTENT_HEIGHT,
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PROP_KINETIC_SCROLLING
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};
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/* Signals */
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enum
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{
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SCROLL_CHILD,
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MOVE_FOCUS_OUT,
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LAST_SIGNAL
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};
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static void gtk_scrolled_window_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_scrolled_window_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_scrolled_window_destroy (GtkWidget *widget);
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static gboolean gtk_scrolled_window_draw (GtkWidget *widget,
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cairo_t *cr);
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static void gtk_scrolled_window_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gboolean gtk_scrolled_window_scroll_event (GtkWidget *widget,
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GdkEventScroll *event);
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static gboolean gtk_scrolled_window_captured_event (GtkWidget *widget,
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GdkEvent *event);
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static gboolean gtk_scrolled_window_focus (GtkWidget *widget,
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GtkDirectionType direction);
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static void gtk_scrolled_window_add (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_scrolled_window_remove (GtkContainer *container,
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GtkWidget *widget);
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static void gtk_scrolled_window_forall (GtkContainer *container,
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gboolean include_internals,
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GtkCallback callback,
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gpointer callback_data);
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static gboolean gtk_scrolled_window_scroll_child (GtkScrolledWindow *scrolled_window,
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GtkScrollType scroll,
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gboolean horizontal);
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static void gtk_scrolled_window_move_focus_out (GtkScrolledWindow *scrolled_window,
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GtkDirectionType direction_type);
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static void gtk_scrolled_window_relative_allocation(GtkWidget *widget,
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GtkAllocation *allocation);
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static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
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gpointer data);
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static void gtk_scrolled_window_adjustment_value_changed (GtkAdjustment *adjustment,
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gpointer data);
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static void gtk_scrolled_window_get_preferred_width (GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size);
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static void gtk_scrolled_window_get_preferred_height (GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size);
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static void gtk_scrolled_window_get_preferred_height_for_width (GtkWidget *layout,
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gint width,
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gint *minimum_height,
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gint *natural_height);
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static void gtk_scrolled_window_get_preferred_width_for_height (GtkWidget *layout,
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gint width,
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gint *minimum_height,
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gint *natural_height);
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static void gtk_scrolled_window_realize (GtkWidget *widget);
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static void gtk_scrolled_window_unrealize (GtkWidget *widget);
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static void gtk_scrolled_window_map (GtkWidget *widget);
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static void gtk_scrolled_window_unmap (GtkWidget *widget);
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static void gtk_scrolled_window_grab_notify (GtkWidget *widget,
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gboolean was_grabbed);
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static gboolean _gtk_scrolled_window_set_adjustment_value (GtkScrolledWindow *scrolled_window,
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GtkAdjustment *adjustment,
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gdouble value,
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gboolean allow_overshooting,
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gboolean snap_to_border);
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static void gtk_scrolled_window_cancel_deceleration (GtkScrolledWindow *scrolled_window);
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static guint signals[LAST_SIGNAL] = {0};
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G_DEFINE_TYPE_WITH_PRIVATE (GtkScrolledWindow, gtk_scrolled_window, GTK_TYPE_BIN)
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static void
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add_scroll_binding (GtkBindingSet *binding_set,
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guint keyval,
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GdkModifierType mask,
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GtkScrollType scroll,
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gboolean horizontal)
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{
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guint keypad_keyval = keyval - GDK_KEY_Left + GDK_KEY_KP_Left;
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gtk_binding_entry_add_signal (binding_set, keyval, mask,
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"scroll-child", 2,
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GTK_TYPE_SCROLL_TYPE, scroll,
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G_TYPE_BOOLEAN, horizontal);
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gtk_binding_entry_add_signal (binding_set, keypad_keyval, mask,
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"scroll-child", 2,
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GTK_TYPE_SCROLL_TYPE, scroll,
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G_TYPE_BOOLEAN, horizontal);
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}
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static void
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add_tab_bindings (GtkBindingSet *binding_set,
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GdkModifierType modifiers,
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GtkDirectionType direction)
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{
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gtk_binding_entry_add_signal (binding_set, GDK_KEY_Tab, modifiers,
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"move-focus-out", 1,
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GTK_TYPE_DIRECTION_TYPE, direction);
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gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Tab, modifiers,
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"move-focus-out", 1,
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GTK_TYPE_DIRECTION_TYPE, direction);
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}
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static void
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gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (class);
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GtkWidgetClass *widget_class;
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GtkContainerClass *container_class;
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GtkBindingSet *binding_set;
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widget_class = (GtkWidgetClass*) class;
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container_class = (GtkContainerClass*) class;
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gobject_class->set_property = gtk_scrolled_window_set_property;
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gobject_class->get_property = gtk_scrolled_window_get_property;
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widget_class->destroy = gtk_scrolled_window_destroy;
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widget_class->draw = gtk_scrolled_window_draw;
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widget_class->size_allocate = gtk_scrolled_window_size_allocate;
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widget_class->scroll_event = gtk_scrolled_window_scroll_event;
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widget_class->focus = gtk_scrolled_window_focus;
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widget_class->get_preferred_width = gtk_scrolled_window_get_preferred_width;
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widget_class->get_preferred_height = gtk_scrolled_window_get_preferred_height;
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widget_class->get_preferred_height_for_width = gtk_scrolled_window_get_preferred_height_for_width;
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widget_class->get_preferred_width_for_height = gtk_scrolled_window_get_preferred_width_for_height;
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widget_class->realize = gtk_scrolled_window_realize;
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widget_class->unrealize = gtk_scrolled_window_unrealize;
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widget_class->map = gtk_scrolled_window_map;
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widget_class->unmap = gtk_scrolled_window_unmap;
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widget_class->grab_notify = gtk_scrolled_window_grab_notify;
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container_class->add = gtk_scrolled_window_add;
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container_class->remove = gtk_scrolled_window_remove;
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container_class->forall = gtk_scrolled_window_forall;
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gtk_container_class_handle_border_width (container_class);
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class->scrollbar_spacing = -1;
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class->scroll_child = gtk_scrolled_window_scroll_child;
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class->move_focus_out = gtk_scrolled_window_move_focus_out;
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g_object_class_install_property (gobject_class,
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PROP_HADJUSTMENT,
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g_param_spec_object ("hadjustment",
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P_("Horizontal Adjustment"),
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P_("The GtkAdjustment for the horizontal position"),
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GTK_TYPE_ADJUSTMENT,
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GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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g_object_class_install_property (gobject_class,
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PROP_VADJUSTMENT,
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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."),
|
||
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.
|
||
*
|
||
* Since: 2.10
|
||
*
|
||
* Deprecated: 3.10: This value is ignored and
|
||
* #GtkScrolledWindow:window-placement value is always honored.
|
||
*/
|
||
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."),
|
||
TRUE,
|
||
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
|
||
* [keybinding signal][GtkBindingSignal]
|
||
* 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
|
||
* [keybinding signal][GtkBindingSignal] 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
|
||
* `Tab + Ctrl` and `Tab + Ctrl + Shift`.
|
||
*/
|
||
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);
|
||
|
||
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);
|
||
|
||
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);
|
||
|
||
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);
|
||
|
||
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);
|
||
|
||
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCROLLED_WINDOW_ACCESSIBLE);
|
||
}
|
||
|
||
static void
|
||
gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
|
||
scrolled_window->priv = priv =
|
||
gtk_scrolled_window_get_instance_private (scrolled_window);
|
||
|
||
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;
|
||
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)
|
||
{
|
||
GtkWidget *scrolled_window;
|
||
|
||
if (hadjustment)
|
||
g_return_val_if_fail (GTK_IS_ADJUSTMENT (hadjustment), NULL);
|
||
|
||
if (vadjustment)
|
||
g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadjustment), NULL);
|
||
|
||
scrolled_window = g_object_new (GTK_TYPE_SCROLLED_WINDOW,
|
||
"hadjustment", hadjustment,
|
||
"vadjustment", vadjustment,
|
||
NULL);
|
||
|
||
return 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 (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
if (hadjustment)
|
||
g_return_if_fail (GTK_IS_ADJUSTMENT (hadjustment));
|
||
else
|
||
hadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
|
||
|
||
bin = GTK_BIN (scrolled_window);
|
||
priv = scrolled_window->priv;
|
||
|
||
if (!priv->hscrollbar)
|
||
{
|
||
priv->hscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_HORIZONTAL, hadjustment);
|
||
|
||
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 (priv->hscrollbar));
|
||
if (old_adjustment == hadjustment)
|
||
return;
|
||
|
||
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 (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);
|
||
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)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
GtkBin *bin;
|
||
GtkWidget *child;
|
||
|
||
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
if (vadjustment)
|
||
g_return_if_fail (GTK_IS_ADJUSTMENT (vadjustment));
|
||
else
|
||
vadjustment = (GtkAdjustment*) g_object_new (GTK_TYPE_ADJUSTMENT, NULL);
|
||
|
||
bin = GTK_BIN (scrolled_window);
|
||
priv = scrolled_window->priv;
|
||
|
||
if (!priv->vscrollbar)
|
||
{
|
||
priv->vscrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, vadjustment);
|
||
|
||
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 (priv->vscrollbar));
|
||
if (old_adjustment == vadjustment)
|
||
return;
|
||
|
||
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 (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);
|
||
|
||
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)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
|
||
g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
|
||
|
||
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)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
|
||
g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
|
||
|
||
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)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
GObject *object = G_OBJECT (scrolled_window);
|
||
|
||
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
|
||
priv = scrolled_window->priv;
|
||
|
||
if ((priv->hscrollbar_policy != hscrollbar_policy) ||
|
||
(priv->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_get_policy (GtkScrolledWindow *scrolled_window,
|
||
GtkPolicyType *hscrollbar_policy,
|
||
GtkPolicyType *vscrollbar_policy)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
|
||
priv = scrolled_window->priv;
|
||
|
||
if (hscrollbar_policy)
|
||
*hscrollbar_policy = priv->hscrollbar_policy;
|
||
if (vscrollbar_policy)
|
||
*vscrollbar_policy = priv->vscrollbar_policy;
|
||
}
|
||
|
||
static void
|
||
gtk_scrolled_window_set_placement_internal (GtkScrolledWindow *scrolled_window,
|
||
GtkCornerType window_placement)
|
||
{
|
||
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
|
||
|
||
if (priv->window_placement != window_placement)
|
||
{
|
||
priv->window_placement = window_placement;
|
||
|
||
gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
|
||
|
||
g_object_notify (G_OBJECT (scrolled_window), "window-placement");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
|
||
gtk_scrolled_window_set_placement_internal (scrolled_window, window_placement);
|
||
}
|
||
|
||
/**
|
||
* 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().
|
||
*
|
||
* Returns: 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)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), GTK_CORNER_TOP_LEFT);
|
||
|
||
return scrolled_window->priv->window_placement;
|
||
}
|
||
|
||
/**
|
||
* 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 defaults to GTK_CORNER_TOP_LEFT.
|
||
*
|
||
* 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 (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
|
||
gtk_scrolled_window_set_placement_internal (scrolled_window, GTK_CORNER_TOP_LEFT);
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
g_return_if_fail (type >= GTK_SHADOW_NONE && type <= GTK_SHADOW_ETCHED_OUT);
|
||
|
||
priv = scrolled_window->priv;
|
||
|
||
if (priv->shadow_type != type)
|
||
{
|
||
priv->shadow_type = type;
|
||
|
||
if (gtk_widget_is_drawable (GTK_WIDGET (scrolled_window)))
|
||
gtk_widget_queue_draw (GTK_WIDGET (scrolled_window));
|
||
|
||
gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
|
||
|
||
g_object_notify (G_OBJECT (scrolled_window), "shadow-type");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 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().
|
||
*
|
||
* Returns: 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);
|
||
|
||
return scrolled_window->priv->shadow_type;
|
||
}
|
||
|
||
/**
|
||
* 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)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
|
||
priv = scrolled_window->priv;
|
||
if (priv->kinetic_scrolling == kinetic_scrolling)
|
||
return;
|
||
|
||
priv->kinetic_scrolling = kinetic_scrolling;
|
||
if (priv->kinetic_scrolling)
|
||
{
|
||
_gtk_widget_set_captured_event_handler (GTK_WIDGET (scrolled_window),
|
||
gtk_scrolled_window_captured_event);
|
||
}
|
||
else
|
||
{
|
||
_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)
|
||
{
|
||
gtk_widget_remove_tick_callback (GTK_WIDGET (scrolled_window), priv->deceleration_id);
|
||
priv->deceleration_id = 0;
|
||
}
|
||
}
|
||
g_object_notify (G_OBJECT (scrolled_window), "kinetic-scrolling");
|
||
}
|
||
|
||
/**
|
||
* gtk_scrolled_window_get_kinetic_scrolling:
|
||
* @scrolled_window: a #GtkScrolledWindow
|
||
*
|
||
* Returns the specified kinetic scrolling behavior.
|
||
*
|
||
* Returns: the scrolling behavior flags.
|
||
*
|
||
* Since: 3.4
|
||
*/
|
||
gboolean
|
||
gtk_scrolled_window_get_kinetic_scrolling (GtkScrolledWindow *scrolled_window)
|
||
{
|
||
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)
|
||
{
|
||
gtk_widget_remove_tick_callback (widget, 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:
|
||
/* noop */
|
||
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, TRUE);
|
||
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
|
||
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->window_placement == GTK_CORNER_TOP_RIGHT ||
|
||
priv->window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
|
||
(!is_rtl &&
|
||
(priv->window_placement == GTK_CORNER_TOP_LEFT ||
|
||
priv->window_placement == GTK_CORNER_BOTTOM_LEFT)))
|
||
junction_rect.x += hscr_allocation.width;
|
||
|
||
if (priv->window_placement == GTK_CORNER_TOP_LEFT ||
|
||
priv->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->window_placement == GTK_CORNER_TOP_RIGHT ||
|
||
priv->window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
|
||
(is_rtl &&
|
||
(priv->window_placement == GTK_CORNER_TOP_LEFT ||
|
||
priv->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->window_placement == GTK_CORNER_BOTTOM_LEFT ||
|
||
priv->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->window_placement == GTK_CORNER_TOP_LEFT ||
|
||
priv->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->window_placement == GTK_CORNER_TOP_LEFT ||
|
||
priv->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->window_placement == GTK_CORNER_TOP_RIGHT ||
|
||
priv->window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
|
||
(gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
|
||
(priv->window_placement == GTK_CORNER_TOP_LEFT ||
|
||
priv->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->window_placement == GTK_CORNER_TOP_RIGHT ||
|
||
priv->window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
|
||
(gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR &&
|
||
(priv->window_placement == GTK_CORNER_TOP_LEFT ||
|
||
priv->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;
|
||
}
|
||
|
||
_gtk_scrolled_window_get_overshoot (scrolled_window,
|
||
&old_overshoot_x, &old_overshoot_y);
|
||
|
||
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);
|
||
}
|
||
|
||
vadjustment = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
|
||
if (vadjustment && priv->vscrollbar_visible)
|
||
{
|
||
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);
|
||
}
|
||
|
||
_gtk_scrolled_window_get_overshoot (scrolled_window,
|
||
&new_overshoot_x, &new_overshoot_y);
|
||
|
||
if (old_overshoot_x != new_overshoot_x ||
|
||
old_overshoot_y != new_overshoot_y)
|
||
{
|
||
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);
|
||
}
|
||
|
||
gtk_scrolled_window_calculate_velocity (scrolled_window, event);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
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);
|
||
g_source_set_name_by_id (priv->release_timeout_id, "[gtk+] gtk_scrolled_window_release_captured_event");
|
||
}
|
||
|
||
priv->in_drag = FALSE;
|
||
|
||
if (priv->capture_button_press)
|
||
{
|
||
/* 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;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_scrolled_window_captured_event (GtkWidget *widget,
|
||
GdkEvent *event)
|
||
{
|
||
gboolean retval = FALSE;
|
||
GtkScrolledWindowPrivate *priv = GTK_SCROLLED_WINDOW (widget)->priv;
|
||
|
||
if (gdk_window_get_window_type (event->any.window) == GDK_WINDOW_TEMP)
|
||
return FALSE;
|
||
|
||
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;
|
||
}
|
||
|
||
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)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
GtkScrolledWindow *scrolled_window;
|
||
|
||
g_return_if_fail (adjustment != NULL);
|
||
g_return_if_fail (data != NULL);
|
||
|
||
scrolled_window = GTK_SCROLLED_WINDOW (data);
|
||
priv = scrolled_window->priv;
|
||
|
||
if (priv->hscrollbar &&
|
||
adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar)))
|
||
{
|
||
if (priv->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
|
||
{
|
||
gboolean visible;
|
||
|
||
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 (priv->vscrollbar &&
|
||
adjustment == gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar)))
|
||
{
|
||
if (priv->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
|
||
{
|
||
gboolean visible;
|
||
|
||
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)
|
||
{
|
||
GtkScrolledWindowPrivate *priv;
|
||
GtkScrolledWindow *scrolled_window;
|
||
GtkBin *bin;
|
||
GtkWidget *child_widget, *scrollable_child;
|
||
GtkAdjustment *hadj, *vadj;
|
||
|
||
bin = GTK_BIN (container);
|
||
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_scrolled_window_set_[hv]adjustment have the side-effect
|
||
* of creating the scrollbars
|
||
*/
|
||
if (!priv->hscrollbar)
|
||
gtk_scrolled_window_set_hadjustment (scrolled_window, NULL);
|
||
|
||
if (!priv->vscrollbar)
|
||
gtk_scrolled_window_set_vadjustment (scrolled_window, NULL);
|
||
|
||
hadj = gtk_range_get_adjustment (GTK_RANGE (priv->hscrollbar));
|
||
vadj = gtk_range_get_adjustment (GTK_RANGE (priv->vscrollbar));
|
||
|
||
if (GTK_IS_SCROLLABLE (child))
|
||
{
|
||
scrollable_child = child;
|
||
}
|
||
else
|
||
{
|
||
scrollable_child = gtk_viewport_new (hadj, vadj);
|
||
gtk_widget_show (scrollable_child);
|
||
gtk_container_set_focus_hadjustment (GTK_CONTAINER (scrollable_child),
|
||
gtk_scrolled_window_get_hadjustment (GTK_SCROLLED_WINDOW (scrolled_window)));
|
||
gtk_container_set_focus_vadjustment (GTK_CONTAINER (scrollable_child),
|
||
gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (scrolled_window)));
|
||
gtk_container_add (GTK_CONTAINER (scrollable_child), child);
|
||
}
|
||
|
||
if (gtk_widget_get_realized (GTK_WIDGET (bin)))
|
||
gtk_widget_set_parent_window (scrollable_child, priv->overshoot_window);
|
||
|
||
_gtk_bin_set_child (bin, scrollable_child);
|
||
gtk_widget_set_parent (scrollable_child, GTK_WIDGET (bin));
|
||
|
||
g_object_set (scrollable_child, "hadjustment", hadj, "vadjustment", vadj, NULL);
|
||
}
|
||
|
||
static void
|
||
gtk_scrolled_window_remove (GtkContainer *container,
|
||
GtkWidget *child)
|
||
{
|
||
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
|
||
g_return_if_fail (child != 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 (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 (GTK_IS_SCROLLED_WINDOW (scrolled_window));
|
||
g_return_if_fail (GTK_IS_WIDGET (child));
|
||
g_return_if_fail (gtk_widget_get_parent (child) == NULL);
|
||
|
||
bin = GTK_BIN (scrolled_window);
|
||
child_widget = gtk_bin_get_child (bin);
|
||
|
||
if (child_widget)
|
||
{
|
||
g_return_if_fail (GTK_IS_VIEWPORT (child_widget));
|
||
g_return_if_fail (gtk_bin_get_child (GTK_BIN (child_widget)) == NULL);
|
||
|
||
viewport = child_widget;
|
||
}
|
||
else
|
||
{
|
||
viewport =
|
||
gtk_viewport_new (gtk_scrolled_window_get_hadjustment (scrolled_window),
|
||
gtk_scrolled_window_get_vadjustment (scrolled_window));
|
||
gtk_container_set_focus_hadjustment (GTK_CONTAINER (viewport),
|
||
gtk_scrolled_window_get_hadjustment (GTK_SCROLLED_WINDOW (scrolled_window)));
|
||
gtk_container_set_focus_vadjustment (GTK_CONTAINER (viewport),
|
||
gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (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
|
||
*
|
||
* Returns: 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");
|
||
}
|
||
}
|