forked from AuroraMiddleware/gtk
6e52ef96a4
It feels slightly wrong to have GtkOrientable operate on widgets, but at least what happens when an orientable widget changes orientation should be part of GtkWidget. This will allow to add more state changes without accessing widget state from the outside of gtkwidget.c.
291 lines
9.1 KiB
C
291 lines
9.1 KiB
C
/* GTK - The GIMP Toolkit
|
||
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
|
||
* Copyright (C) 2001 Red Hat, Inc.
|
||
*
|
||
* This library is free software; you can redistribute it and/or
|
||
* modify it under the terms of the GNU Lesser General Public
|
||
* License as published by the Free Software Foundation; either
|
||
* version 2 of the License, or (at your option) any later version.
|
||
*
|
||
* This library is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
* Lesser General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU Lesser General Public
|
||
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||
*/
|
||
|
||
/*
|
||
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
|
||
* file for a list of people on the GTK+ Team. See the ChangeLog
|
||
* files for a list of changes. These files are distributed with
|
||
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
|
||
*/
|
||
|
||
#include "config.h"
|
||
|
||
#include "gtkscrollbar.h"
|
||
#include "gtkrange.h"
|
||
|
||
#include "gtkadjustment.h"
|
||
#include "gtkintl.h"
|
||
#include "gtkorientable.h"
|
||
#include "gtkprivate.h"
|
||
#include "gtkwidgetprivate.h"
|
||
#include "gtkboxlayout.h"
|
||
|
||
#include "a11y/gtkscrollbaraccessible.h"
|
||
|
||
|
||
/**
|
||
* SECTION:gtkscrollbar
|
||
* @Short_description: A Scrollbar
|
||
* @Title: GtkScrollbar
|
||
* @See_also: #GtkAdjustment, #GtkScrolledWindow
|
||
*
|
||
* The #GtkScrollbar widget is a horizontal or vertical scrollbar,
|
||
* depending on the value of the #GtkOrientable:orientation property.
|
||
*
|
||
* Its position and movement are controlled by the adjustment that is passed to
|
||
* or created by gtk_scrollbar_new(). See #GtkAdjustment for more details. The
|
||
* #GtkAdjustment:value field sets the position of the thumb and must be between
|
||
* #GtkAdjustment:lower and #GtkAdjustment:upper - #GtkAdjustment:page-size. The
|
||
* #GtkAdjustment:page-size represents the size of the visible scrollable area.
|
||
* The fields #GtkAdjustment:step-increment and #GtkAdjustment:page-increment
|
||
* fields are added to or subtracted from the #GtkAdjustment:value when the user
|
||
* asks to move by a step (using e.g. the cursor arrow keys or, if present, the
|
||
* stepper buttons) or by a page (using e.g. the Page Down/Up keys).
|
||
*
|
||
* # CSS nodes
|
||
*
|
||
* |[<!-- language="plain" -->
|
||
* scrollbar
|
||
* ╰── range[.fine-tune]
|
||
* ╰── trough
|
||
* ╰── slider
|
||
* ]|
|
||
*
|
||
* GtkScrollbar has a main CSS node with name scrollbar and a subnode for its
|
||
* contents. The main node gets the .horizontal or .vertical
|
||
* style classes applied, depending on the scrollbar's orientation.
|
||
*
|
||
* The range node gets the style class .fine-tune added when the scrollbar is
|
||
* in 'fine-tuning' mode.
|
||
*
|
||
* If steppers are enabled, they are represented by up to four additional
|
||
* subnodes with name button. These get the style classes .up and .down to
|
||
* indicate in which direction they are moving.
|
||
*
|
||
* Other style classes that may be added to scrollbars inside #GtkScrolledWindow
|
||
* include the positional classes (.left, .right, .top, .bottom) and style
|
||
* classes related to overlay scrolling (.overlay-indicator, .dragging, .hovering).
|
||
*/
|
||
|
||
typedef struct _GtkScrollbarClass GtkScrollbarClass;
|
||
|
||
struct _GtkScrollbar
|
||
{
|
||
GtkWidget parent_instance;
|
||
};
|
||
|
||
struct _GtkScrollbarClass
|
||
{
|
||
GtkWidgetClass parent_class;
|
||
};
|
||
|
||
typedef struct {
|
||
GtkOrientation orientation;
|
||
GtkWidget *range;
|
||
} GtkScrollbarPrivate;
|
||
|
||
enum {
|
||
PROP_0,
|
||
PROP_ADJUSTMENT,
|
||
|
||
PROP_ORIENTATION,
|
||
LAST_PROP = PROP_ORIENTATION
|
||
};
|
||
|
||
G_DEFINE_TYPE_WITH_CODE (GtkScrollbar, gtk_scrollbar, GTK_TYPE_WIDGET,
|
||
G_ADD_PRIVATE (GtkScrollbar)
|
||
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
|
||
|
||
|
||
static GParamSpec *props[LAST_PROP] = { NULL, };
|
||
|
||
static void
|
||
gtk_scrollbar_get_property (GObject *object,
|
||
guint property_id,
|
||
GValue *value,
|
||
GParamSpec *pspec)
|
||
{
|
||
GtkScrollbar *self = GTK_SCROLLBAR (object);
|
||
GtkScrollbarPrivate *priv = gtk_scrollbar_get_instance_private (self);
|
||
|
||
switch (property_id)
|
||
{
|
||
case PROP_ADJUSTMENT:
|
||
g_value_set_object (value, gtk_scrollbar_get_adjustment (self));
|
||
break;
|
||
case PROP_ORIENTATION:
|
||
g_value_set_enum (value, priv->orientation);
|
||
break;
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scrollbar_set_property (GObject *object,
|
||
guint property_id,
|
||
const GValue *value,
|
||
GParamSpec *pspec)
|
||
{
|
||
GtkScrollbar *self = GTK_SCROLLBAR (object);
|
||
GtkScrollbarPrivate *priv = gtk_scrollbar_get_instance_private (self);
|
||
|
||
switch (property_id)
|
||
{
|
||
case PROP_ADJUSTMENT:
|
||
gtk_scrollbar_set_adjustment (self, g_value_get_object (value));
|
||
break;
|
||
case PROP_ORIENTATION:
|
||
{
|
||
GtkOrientation orientation = g_value_get_enum (value);
|
||
|
||
if (orientation != priv->orientation)
|
||
{
|
||
GtkLayoutManager *layout = gtk_widget_get_layout_manager (GTK_WIDGET (self));
|
||
gtk_orientable_set_orientation (GTK_ORIENTABLE (layout), orientation);
|
||
gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->range), orientation);
|
||
priv->orientation = orientation;
|
||
gtk_widget_update_orientation (GTK_WIDGET (self), priv->orientation);
|
||
gtk_widget_queue_resize (GTK_WIDGET (self));
|
||
g_object_notify_by_pspec (object, pspec);
|
||
}
|
||
}
|
||
break;
|
||
default:
|
||
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_scrollbar_dispose (GObject *object)
|
||
{
|
||
GtkScrollbar *self = GTK_SCROLLBAR (object);
|
||
GtkScrollbarPrivate *priv = gtk_scrollbar_get_instance_private (self);
|
||
|
||
g_clear_pointer (&priv->range, gtk_widget_unparent);
|
||
|
||
G_OBJECT_CLASS (gtk_scrollbar_parent_class)->dispose (object);
|
||
}
|
||
|
||
static void
|
||
gtk_scrollbar_class_init (GtkScrollbarClass *class)
|
||
{
|
||
GObjectClass *object_class = G_OBJECT_CLASS (class);
|
||
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
|
||
|
||
object_class->get_property = gtk_scrollbar_get_property;
|
||
object_class->set_property = gtk_scrollbar_set_property;
|
||
object_class->dispose = gtk_scrollbar_dispose;
|
||
|
||
props[PROP_ADJUSTMENT] =
|
||
g_param_spec_object ("adjustment",
|
||
P_("Adjustment"),
|
||
P_("The GtkAdjustment that contains the current value of this scrollbar"),
|
||
GTK_TYPE_ADJUSTMENT,
|
||
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT);
|
||
|
||
g_object_class_install_properties (object_class, LAST_PROP, props);
|
||
|
||
g_object_class_override_property (object_class, PROP_ORIENTATION, "orientation");
|
||
|
||
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SCROLLBAR_ACCESSIBLE);
|
||
gtk_widget_class_set_css_name (widget_class, I_("scrollbar"));
|
||
gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BOX_LAYOUT);
|
||
}
|
||
|
||
static void
|
||
gtk_scrollbar_init (GtkScrollbar *self)
|
||
{
|
||
GtkScrollbarPrivate *priv = gtk_scrollbar_get_instance_private (self);
|
||
|
||
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
|
||
|
||
priv->range = g_object_new (GTK_TYPE_RANGE, NULL);
|
||
gtk_widget_set_hexpand (priv->range, TRUE);
|
||
gtk_widget_set_vexpand (priv->range, TRUE);
|
||
gtk_widget_set_parent (priv->range, GTK_WIDGET (self));
|
||
gtk_widget_update_orientation (GTK_WIDGET (self), priv->orientation);
|
||
}
|
||
|
||
/**
|
||
* gtk_scrollbar_new:
|
||
* @orientation: the scrollbar’s orientation.
|
||
* @adjustment: (allow-none): the #GtkAdjustment to use, or %NULL to create a new adjustment.
|
||
*
|
||
* Creates a new scrollbar with the given orientation.
|
||
*
|
||
* Returns: the new #GtkScrollbar.
|
||
**/
|
||
GtkWidget *
|
||
gtk_scrollbar_new (GtkOrientation orientation,
|
||
GtkAdjustment *adjustment)
|
||
{
|
||
g_return_val_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment),
|
||
NULL);
|
||
|
||
return g_object_new (GTK_TYPE_SCROLLBAR,
|
||
"orientation", orientation,
|
||
"adjustment", adjustment,
|
||
NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_scrollbar_set_adjustment:
|
||
* @self: a #GtkScrollbar
|
||
* @adjustment: (nullable): the adjustment to set
|
||
*
|
||
* Makes the scrollbar use the given adjustment.
|
||
*/
|
||
void
|
||
gtk_scrollbar_set_adjustment (GtkScrollbar *self,
|
||
GtkAdjustment *adjustment)
|
||
{
|
||
GtkScrollbarPrivate *priv = gtk_scrollbar_get_instance_private (self);
|
||
|
||
g_return_if_fail (GTK_IS_SCROLLBAR (self));
|
||
g_return_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment));
|
||
|
||
|
||
gtk_range_set_adjustment (GTK_RANGE (priv->range), adjustment);
|
||
|
||
g_object_notify_by_pspec (G_OBJECT (self), props[PROP_ADJUSTMENT]);
|
||
}
|
||
|
||
/**
|
||
* gtk_scrollbar_get_adjustment:
|
||
* @self: a #GtkScrollbar
|
||
*
|
||
* Returns the scrollbar's adjustment.
|
||
*
|
||
* Returns: (transfer none): the scrollbar's adjustment
|
||
*/
|
||
GtkAdjustment *
|
||
gtk_scrollbar_get_adjustment (GtkScrollbar *self)
|
||
{
|
||
GtkScrollbarPrivate *priv = gtk_scrollbar_get_instance_private (self);
|
||
|
||
g_return_val_if_fail (GTK_IS_SCROLLBAR (self), NULL);
|
||
|
||
if (priv->range)
|
||
return gtk_range_get_adjustment (GTK_RANGE (priv->range));
|
||
|
||
return NULL;
|
||
}
|