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/* ATK - Accessibility Toolkit
* Copyright 2001 Sun Microsystems Inc.
* Copyright 2014 Igalia S.L.
*
* Author: Alejandro Piñeiro Iglesias <apinheiro@igalia.com>
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <atk/atk.h>
/**
* TestValue:
* this example serves as a unit test for AtkValue
* and also as an example of how to implement #AtkValue on a given
* GObject.
* This test will represent a volume slider, smart enough to have
* classify the values on the global range [0,1] with the
* descriptions "low", "medium", "high" and "very high". As the
* clasification is fixed, it also expose all the four possible
* subranges. To fill the description name it will use some of the
* already defined #AtkValueType.
* This will implement all the methods of #AtkValue, but note that
* this is not mandatory on all the cases. In several cases it is not
* needed to implement the subranges methods. See #AtkValue
* documentation for further information.
#define EXPECTED_NUMBER 7
#define LOWER_LIMIT 0
#define LOW_THRESHOLD 0.2
#define NORMAL_THRESHOLD 0.4
#define HIGH_THRESHOLD 0.8
#define RISKY_THRESHOLD 1.0
#define UPPER_LIMIT 1.0
#define INCREMENT 0.15
gboolean test_success = TRUE;
GObject *my_value;
#define TEST_TYPE_VALUE (test_value_get_type ())
#define TEST_VALUE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TEST_TYPE_VALUE, TestValue))
#define TEST_VALUE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TEST_TYPE_VALUE, TestValueClass))
#define TEST_IS_VALUE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TEST_TYPE_VALUE))
#define TEST_IS_VALUE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TEST_TYPE_VALUE))
#define TEST_VALUE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), TEST_TYPE_VALUE, TestValueClass))
typedef struct _TestValue TestValue;
typedef struct _TestValueClass TestValueClass;
struct _TestValue
{
AtkObject parent;
GMainLoop *loop;
gint number_emissions;
gdouble value;
};
struct _TestValueClass
AtkObjectClass parent_class;
GType test_value_get_type (void) G_GNUC_CONST;
static void test_value_interface_init (AtkValueIface *iface);
G_DEFINE_TYPE_WITH_CODE (TestValue,
test_value,
ATK_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (ATK_TYPE_VALUE,
test_value_interface_init));
static void
test_value_class_init (TestValueClass *klass)
}
test_value_init (TestValue *value)
static const gchar *
get_description (gdouble value)
const gchar *description = NULL;
if (value < LOW_THRESHOLD)
description = atk_value_type_get_localized_name (ATK_VALUE_LOW);
else if (value < NORMAL_THRESHOLD)
description = atk_value_type_get_localized_name (ATK_VALUE_MEDIUM);
else if (value < HIGH_THRESHOLD)
description = atk_value_type_get_localized_name (ATK_VALUE_HIGH);
else
description = atk_value_type_get_localized_name (ATK_VALUE_VERY_HIGH);
return description;
test_value_get_value_and_text (AtkValue *value,
gdouble *current_value,
gchar **description)
TestValue *self;
g_return_if_fail (TEST_IS_VALUE (value));
self = TEST_VALUE (value);
if (current_value != NULL)
*current_value = self->value;
if (description != NULL)
*description = g_strdup (get_description (self->value));
AtkRange *
test_value_get_range (AtkValue *value)
AtkRange *result;
g_return_val_if_fail (TEST_IS_VALUE (value), NULL);
result = atk_range_new (LOWER_LIMIT,
UPPER_LIMIT,
NULL);
return result;
gdouble
test_value_get_increment (AtkValue *value)
g_return_val_if_fail (TEST_IS_VALUE (value), 0.0);
return INCREMENT;
GSList *
test_value_get_sub_ranges (AtkValue *value)
GSList *result = NULL;
AtkRange *range = NULL;
/* low */
range = atk_range_new (LOWER_LIMIT, LOW_THRESHOLD,
get_description (LOWER_LIMIT));
result = g_slist_append (result, range);
/* normal */
range = atk_range_new (LOW_THRESHOLD, NORMAL_THRESHOLD,
get_description (LOW_THRESHOLD));
/* high */
range = atk_range_new (NORMAL_THRESHOLD, HIGH_THRESHOLD,
get_description (NORMAL_THRESHOLD));
/* very high */
range = atk_range_new (HIGH_THRESHOLD, UPPER_LIMIT,
get_description (HIGH_THRESHOLD));
void
test_value_set_value (AtkValue *value,
double new_value)
if (new_value < LOWER_LIMIT)
new_value = LOWER_LIMIT;
if (new_value > UPPER_LIMIT)
new_value = UPPER_LIMIT;
if (new_value != self->value)
gchar *description = g_strdup (get_description (new_value));
self->value = new_value;
g_signal_emit_by_name (value, "value-changed", new_value, description, NULL);
g_free (description);
test_value_interface_init (AtkValueIface *iface)
iface->get_value_and_text = test_value_get_value_and_text;
iface->get_range = test_value_get_range;
iface->get_increment = test_value_get_increment;
iface->get_sub_ranges = test_value_get_sub_ranges;
iface->set_value = test_value_set_value;
value_page_changed_cb (AtkValue *value,
gdouble new_value,
gchar *new_description,
gpointer data)
TestValue *test_value = TEST_VALUE (value);
g_print ("value-changed callback=(%f,%s)\n", new_value, new_description);
test_value->number_emissions++;
* This call simulates a user interacting with the slider.
static gboolean
do_value_changed (gpointer data)
TestValue *test_value = TEST_VALUE (data);
atk_value_set_value (ATK_VALUE (test_value),
test_value->value + INCREMENT);
if (test_value->number_emissions == EXPECTED_NUMBER)
g_main_loop_quit (test_value->loop);
return G_SOURCE_REMOVE;
return G_SOURCE_CONTINUE;
test_page_changed (void)
TestValue *my_value = TEST_VALUE (g_object_new (TEST_TYPE_VALUE, NULL));
g_signal_connect (my_value, "value-changed",
G_CALLBACK (value_page_changed_cb),
g_idle_add (do_value_changed, my_value);
my_value->loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (my_value->loop);
g_assert_cmpint (my_value->number_emissions, ==, EXPECTED_NUMBER);
g_main_loop_unref (my_value->loop);
g_object_unref (my_value);
int
main (gint argc,
char *argv[])
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/atk/value/page_changed", test_page_changed);
return g_test_run ();