forked from AuroraMiddleware/gtk
179 lines
7.2 KiB
C
179 lines
7.2 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 "gtkadjustment.h"
|
|
#include "gtkintl.h"
|
|
#include "gtkprivate.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.
|
|
*
|
|
* The position of the thumb in a scrollbar is controlled by the scroll
|
|
* adjustments. See #GtkAdjustment for the fields in an adjustment - for
|
|
* #GtkScrollbar, the #GtkAdjustment:value field represents the position
|
|
* of the scrollbar, which must be between the #GtkAdjustment:lower field
|
|
* and #GtkAdjustment:upper - #GtkAdjustment:page-size. The
|
|
* #GtkAdjustment:page-size field represents the size of the visible
|
|
* scrollable area. The #GtkAdjustment:step-increment and
|
|
* #GtkAdjustment:page-increment fields are properties when the user asks to
|
|
* step down (using the small stepper arrows) or page down (using for
|
|
* example the <keycap>PageDown</keycap> key).
|
|
*/
|
|
|
|
|
|
static void gtk_scrollbar_style_updated (GtkWidget *widget);
|
|
|
|
G_DEFINE_TYPE (GtkScrollbar, gtk_scrollbar, GTK_TYPE_RANGE)
|
|
|
|
static void
|
|
gtk_scrollbar_class_init (GtkScrollbarClass *class)
|
|
{
|
|
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
|
|
|
|
widget_class->style_updated = gtk_scrollbar_style_updated;
|
|
|
|
gtk_widget_class_install_style_property (widget_class,
|
|
g_param_spec_int ("min-slider-length",
|
|
P_("Minimum Slider Length"),
|
|
P_("Minimum length of scrollbar slider"),
|
|
0,
|
|
G_MAXINT,
|
|
21,
|
|
GTK_PARAM_READABLE));
|
|
|
|
gtk_widget_class_install_style_property (widget_class,
|
|
g_param_spec_boolean ("fixed-slider-length",
|
|
P_("Fixed slider size"),
|
|
P_("Don't change slider size, just lock it to the minimum length"),
|
|
FALSE,
|
|
GTK_PARAM_READABLE));
|
|
|
|
gtk_widget_class_install_style_property (widget_class,
|
|
g_param_spec_boolean ("has-backward-stepper",
|
|
P_("Backward stepper"),
|
|
P_("Display the standard backward arrow button"),
|
|
TRUE,
|
|
GTK_PARAM_READABLE));
|
|
|
|
gtk_widget_class_install_style_property (widget_class,
|
|
g_param_spec_boolean ("has-forward-stepper",
|
|
P_("Forward stepper"),
|
|
P_("Display the standard forward arrow button"),
|
|
TRUE,
|
|
GTK_PARAM_READABLE));
|
|
|
|
gtk_widget_class_install_style_property (widget_class,
|
|
g_param_spec_boolean ("has-secondary-backward-stepper",
|
|
P_("Secondary backward stepper"),
|
|
P_("Display a second backward arrow button on the opposite end of the scrollbar"),
|
|
FALSE,
|
|
GTK_PARAM_READABLE));
|
|
|
|
gtk_widget_class_install_style_property (widget_class,
|
|
g_param_spec_boolean ("has-secondary-forward-stepper",
|
|
P_("Secondary forward stepper"),
|
|
P_("Display a second forward arrow button on the opposite end of the scrollbar"),
|
|
FALSE,
|
|
GTK_PARAM_READABLE));
|
|
|
|
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_SCROLL_BAR);
|
|
}
|
|
|
|
static void
|
|
gtk_scrollbar_update_style (GtkScrollbar *scrollbar)
|
|
{
|
|
gint slider_length;
|
|
gboolean fixed_size;
|
|
gboolean has_a, has_b, has_c, has_d;
|
|
GtkRange *range = GTK_RANGE (scrollbar);
|
|
GtkWidget *widget = GTK_WIDGET (scrollbar);
|
|
|
|
gtk_widget_style_get (widget,
|
|
"min-slider-length", &slider_length,
|
|
"fixed-slider-length", &fixed_size,
|
|
"has-backward-stepper", &has_a,
|
|
"has-secondary-forward-stepper", &has_b,
|
|
"has-secondary-backward-stepper", &has_c,
|
|
"has-forward-stepper", &has_d,
|
|
NULL);
|
|
|
|
gtk_range_set_min_slider_size (range, slider_length);
|
|
gtk_range_set_slider_size_fixed (range, fixed_size);
|
|
_gtk_range_set_steppers (range,
|
|
has_a, has_b, has_c, has_d);
|
|
}
|
|
|
|
static void
|
|
gtk_scrollbar_init (GtkScrollbar *scrollbar)
|
|
{
|
|
GtkStyleContext *context;
|
|
|
|
context = gtk_widget_get_style_context (GTK_WIDGET (scrollbar));
|
|
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SCROLLBAR);
|
|
gtk_scrollbar_update_style (scrollbar);
|
|
}
|
|
|
|
static void
|
|
gtk_scrollbar_style_updated (GtkWidget *widget)
|
|
{
|
|
gtk_scrollbar_update_style (GTK_SCROLLBAR (widget));
|
|
GTK_WIDGET_CLASS (gtk_scrollbar_parent_class)->style_updated (widget);
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* Return value: the new #GtkScrollbar.
|
|
*
|
|
* Since: 3.0
|
|
**/
|
|
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);
|
|
}
|