forked from AuroraMiddleware/gtk
398 lines
11 KiB
C
398 lines
11 KiB
C
/* GTK - The GIMP Toolkit
|
|
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU 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, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/*
|
|
* 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 "gtkadjustment.h"
|
|
#include "gtkmarshalers.h"
|
|
#include "gtkprivate.h"
|
|
#include "gtkintl.h"
|
|
#include "gtkalias.h"
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_VALUE,
|
|
PROP_LOWER,
|
|
PROP_UPPER,
|
|
PROP_STEP_INCREMENT,
|
|
PROP_PAGE_INCREMENT,
|
|
PROP_PAGE_SIZE
|
|
};
|
|
|
|
enum {
|
|
CHANGED,
|
|
VALUE_CHANGED,
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
|
|
static void gtk_adjustment_get_property (GObject *object,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec);
|
|
static void gtk_adjustment_set_property (GObject *object,
|
|
guint prop_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec);
|
|
|
|
static guint adjustment_signals[LAST_SIGNAL] = { 0 };
|
|
|
|
G_DEFINE_TYPE (GtkAdjustment, gtk_adjustment, GTK_TYPE_OBJECT);
|
|
|
|
static void
|
|
gtk_adjustment_class_init (GtkAdjustmentClass *class)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
|
|
|
|
gobject_class->set_property = gtk_adjustment_set_property;
|
|
gobject_class->get_property = gtk_adjustment_get_property;
|
|
|
|
class->changed = NULL;
|
|
class->value_changed = NULL;
|
|
|
|
/**
|
|
* GtkAdjustment:value:
|
|
*
|
|
* The value of the adjustment.
|
|
*
|
|
* Since: 2.4
|
|
*/
|
|
g_object_class_install_property (gobject_class,
|
|
PROP_VALUE,
|
|
g_param_spec_double ("value",
|
|
P_("Value"),
|
|
P_("The value of the adjustment"),
|
|
-G_MAXDOUBLE,
|
|
G_MAXDOUBLE,
|
|
0.0,
|
|
GTK_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GtkAdjustment:lower:
|
|
*
|
|
* The minimum value of the adjustment.
|
|
*
|
|
* Since: 2.4
|
|
*/
|
|
g_object_class_install_property (gobject_class,
|
|
PROP_LOWER,
|
|
g_param_spec_double ("lower",
|
|
P_("Minimum Value"),
|
|
P_("The minimum value of the adjustment"),
|
|
-G_MAXDOUBLE,
|
|
G_MAXDOUBLE,
|
|
0.0,
|
|
GTK_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GtkAdjustment:upper:
|
|
*
|
|
* The maximum value of the adjustment.
|
|
* Note that values will be restricted by
|
|
* <literal>upper - page-size</literal> if the page-size
|
|
* property is nonzero.
|
|
*
|
|
* Since: 2.4
|
|
*/
|
|
g_object_class_install_property (gobject_class,
|
|
PROP_UPPER,
|
|
g_param_spec_double ("upper",
|
|
P_("Maximum Value"),
|
|
P_("The maximum value of the adjustment"),
|
|
-G_MAXDOUBLE,
|
|
G_MAXDOUBLE,
|
|
0.0,
|
|
GTK_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GtkAdjustment:step-increment:
|
|
*
|
|
* The step increment of the adjustment.
|
|
*
|
|
* Since: 2.4
|
|
*/
|
|
g_object_class_install_property (gobject_class,
|
|
PROP_STEP_INCREMENT,
|
|
g_param_spec_double ("step-increment",
|
|
P_("Step Increment"),
|
|
P_("The step increment of the adjustment"),
|
|
-G_MAXDOUBLE,
|
|
G_MAXDOUBLE,
|
|
0.0,
|
|
GTK_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GtkAdjustment:page-increment:
|
|
*
|
|
* The page increment of the adjustment.
|
|
*
|
|
* Since: 2.4
|
|
*/
|
|
g_object_class_install_property (gobject_class,
|
|
PROP_PAGE_INCREMENT,
|
|
g_param_spec_double ("page-increment",
|
|
P_("Page Increment"),
|
|
P_("The page increment of the adjustment"),
|
|
-G_MAXDOUBLE,
|
|
G_MAXDOUBLE,
|
|
0.0,
|
|
GTK_PARAM_READWRITE));
|
|
|
|
/**
|
|
* GtkAdjustment:page-size:
|
|
*
|
|
* The page size of the adjustment.
|
|
* Note that the page-size is irrelevant and should be set to zero
|
|
* if the adjustment is used for a simple scalar value, e.g. in a
|
|
* #GtkSpinButton.
|
|
*
|
|
* Since: 2.4
|
|
*/
|
|
g_object_class_install_property (gobject_class,
|
|
PROP_PAGE_SIZE,
|
|
g_param_spec_double ("page-size",
|
|
P_("Page Size"),
|
|
P_("The page size of the adjustment"),
|
|
-G_MAXDOUBLE,
|
|
G_MAXDOUBLE,
|
|
0.0,
|
|
GTK_PARAM_READWRITE));
|
|
|
|
|
|
adjustment_signals[CHANGED] =
|
|
g_signal_new (I_("changed"),
|
|
G_OBJECT_CLASS_TYPE (class),
|
|
G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE,
|
|
G_STRUCT_OFFSET (GtkAdjustmentClass, changed),
|
|
NULL, NULL,
|
|
_gtk_marshal_VOID__VOID,
|
|
G_TYPE_NONE, 0);
|
|
adjustment_signals[VALUE_CHANGED] =
|
|
g_signal_new (I_("value_changed"),
|
|
G_OBJECT_CLASS_TYPE (class),
|
|
G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE,
|
|
G_STRUCT_OFFSET (GtkAdjustmentClass, value_changed),
|
|
NULL, NULL,
|
|
_gtk_marshal_VOID__VOID,
|
|
G_TYPE_NONE, 0);
|
|
}
|
|
|
|
static void
|
|
gtk_adjustment_init (GtkAdjustment *adjustment)
|
|
{
|
|
adjustment->value = 0.0;
|
|
adjustment->lower = 0.0;
|
|
adjustment->upper = 0.0;
|
|
adjustment->step_increment = 0.0;
|
|
adjustment->page_increment = 0.0;
|
|
adjustment->page_size = 0.0;
|
|
}
|
|
|
|
static void
|
|
gtk_adjustment_get_property (GObject *object, guint prop_id, GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
GtkAdjustment *adjustment = GTK_ADJUSTMENT (object);
|
|
|
|
switch (prop_id)
|
|
{
|
|
case PROP_VALUE:
|
|
g_value_set_double (value, adjustment->value);
|
|
break;
|
|
case PROP_LOWER:
|
|
g_value_set_double (value, adjustment->lower);
|
|
break;
|
|
case PROP_UPPER:
|
|
g_value_set_double (value, adjustment->upper);
|
|
break;
|
|
case PROP_STEP_INCREMENT:
|
|
g_value_set_double (value, adjustment->step_increment);
|
|
break;
|
|
case PROP_PAGE_INCREMENT:
|
|
g_value_set_double (value, adjustment->page_increment);
|
|
break;
|
|
case PROP_PAGE_SIZE:
|
|
g_value_set_double (value, adjustment->page_size);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_adjustment_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GtkAdjustment *adjustment = GTK_ADJUSTMENT (object);
|
|
gdouble double_value = g_value_get_double (value);
|
|
|
|
switch (prop_id)
|
|
{
|
|
case PROP_VALUE:
|
|
gtk_adjustment_set_value (GTK_ADJUSTMENT (object), double_value);
|
|
break;
|
|
case PROP_LOWER:
|
|
if (adjustment->lower != double_value)
|
|
{
|
|
adjustment->lower = double_value;
|
|
g_object_notify (G_OBJECT (adjustment), "lower");
|
|
}
|
|
break;
|
|
case PROP_UPPER:
|
|
if (adjustment->upper != double_value)
|
|
{
|
|
adjustment->upper = double_value;
|
|
g_object_notify (G_OBJECT (adjustment), "upper");
|
|
}
|
|
break;
|
|
case PROP_STEP_INCREMENT:
|
|
if (adjustment->step_increment != double_value)
|
|
{
|
|
adjustment->step_increment = double_value;
|
|
g_object_notify (G_OBJECT (adjustment), "step-increment");
|
|
}
|
|
break;
|
|
case PROP_PAGE_INCREMENT:
|
|
if (adjustment->page_increment != double_value)
|
|
{
|
|
adjustment->page_increment = double_value;
|
|
g_object_notify (G_OBJECT (adjustment), "page-increment");
|
|
}
|
|
break;
|
|
case PROP_PAGE_SIZE:
|
|
if (adjustment->page_size != double_value)
|
|
{
|
|
adjustment->page_size = double_value;
|
|
g_object_notify (G_OBJECT (adjustment), "page-size");
|
|
}
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
GtkObject*
|
|
gtk_adjustment_new (gdouble value,
|
|
gdouble lower,
|
|
gdouble upper,
|
|
gdouble step_increment,
|
|
gdouble page_increment,
|
|
gdouble page_size)
|
|
{
|
|
return g_object_new (GTK_TYPE_ADJUSTMENT,
|
|
"lower", lower,
|
|
"upper", upper,
|
|
"step-increment", step_increment,
|
|
"page-increment", page_increment,
|
|
"page-size", page_size,
|
|
"value", value,
|
|
NULL);
|
|
}
|
|
|
|
/**
|
|
* gtk_adjustment_get_value:
|
|
* @adjustment: a #GtkAdjustment
|
|
*
|
|
* Gets the current value of the adjustment. See
|
|
* gtk_adjustment_set_value ().
|
|
*
|
|
* Return value: The current value of the adjustment.
|
|
**/
|
|
gdouble
|
|
gtk_adjustment_get_value (GtkAdjustment *adjustment)
|
|
{
|
|
g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), 0.);
|
|
|
|
return adjustment->value;
|
|
}
|
|
|
|
void
|
|
gtk_adjustment_set_value (GtkAdjustment *adjustment,
|
|
gdouble value)
|
|
{
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
value = CLAMP (value, adjustment->lower, adjustment->upper);
|
|
|
|
if (value != adjustment->value)
|
|
{
|
|
adjustment->value = value;
|
|
|
|
gtk_adjustment_value_changed (adjustment);
|
|
}
|
|
}
|
|
|
|
void
|
|
gtk_adjustment_changed (GtkAdjustment *adjustment)
|
|
{
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
g_signal_emit (adjustment, adjustment_signals[CHANGED], 0);
|
|
}
|
|
|
|
void
|
|
gtk_adjustment_value_changed (GtkAdjustment *adjustment)
|
|
{
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
g_signal_emit (adjustment, adjustment_signals[VALUE_CHANGED], 0);
|
|
g_object_notify (G_OBJECT (adjustment), "value");
|
|
}
|
|
|
|
void
|
|
gtk_adjustment_clamp_page (GtkAdjustment *adjustment,
|
|
gdouble lower,
|
|
gdouble upper)
|
|
{
|
|
gboolean need_emission;
|
|
|
|
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
|
|
|
|
lower = CLAMP (lower, adjustment->lower, adjustment->upper);
|
|
upper = CLAMP (upper, adjustment->lower, adjustment->upper);
|
|
|
|
need_emission = FALSE;
|
|
|
|
if (adjustment->value + adjustment->page_size < upper)
|
|
{
|
|
adjustment->value = upper - adjustment->page_size;
|
|
need_emission = TRUE;
|
|
}
|
|
if (adjustment->value > lower)
|
|
{
|
|
adjustment->value = lower;
|
|
need_emission = TRUE;
|
|
}
|
|
|
|
if (need_emission)
|
|
gtk_adjustment_value_changed (adjustment);
|
|
}
|
|
|
|
#define __GTK_ADJUSTMENT_C__
|
|
#include "gtkaliasdef.c"
|