Commit 9a065edf authored by Matthias Clasen's avatar Matthias Clasen

Add an example of exporting a GObject

This is more manual work than dbus-glib.
parent ea1e0496
......@@ -156,6 +156,8 @@
* <example id="gdbus-subtree-server"><title>D-Bus subtree example</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-subtree.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
*
* <example id="gdbus-unix-fd-client"><title>D-Bus UNIX File Descriptor example</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-unix-fd-client.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
*
* <example id="gdbus-export"><title>Exporting a GObject</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-export.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
*/
/* ---------------------------------------------------------------------------------------------------- */
......
......@@ -58,6 +58,7 @@ SAMPLE_PROGS = \
httpd \
send-data \
filter-cat \
gdbus-example-export \
gdbus-example-own-name \
gdbus-example-watch-name \
gdbus-example-watch-proxy \
......@@ -234,6 +235,9 @@ gdbus_example_peer_LDADD = $(progs_ldadd)
gdbus_example_proxy_subclass_SOURCES = gdbus-example-proxy-subclass.c
gdbus_example_proxy_subclass_LDADD = $(progs_ldadd)
gdbus_example_export_SOURCES = gdbus-example-export.c
gdbus_example_export_LDADD = $(progs_ldadd)
EXTRA_DIST += \
socket-common.c \
org.gtk.test.gschema \
......
#include <gio/gio.h>
#include <stdlib.h>
* ---------------------------------------------------------------------------------------------------- */
/* The object we want to export */
typedef struct _MyObjectClass MyObjectClass;
typedef struct _MyObject MyObject;
struct _MyObjectClass
{
GObjectClass parent_class;
};
struct _MyObject
{
GObject parent_instance;
gint count;
gchar *name;
};
enum
{
PROP_0,
PROP_COUNT,
PROP_NAME
};
G_DEFINE_TYPE (MyObject, my_object, G_TYPE_OBJECT);
static void
my_object_finalize (GObject *object)
{
MyObject *myobj = (MyObject*)object;
g_free (myobj->name);
G_OBJECT_CLASS (my_object_parent_class)->finalize (object);
}
static void
my_object_init (MyObject *object)
{
object->count = 0;
object->name = NULL;
}
static void
my_object_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MyObject *myobj = (MyObject*)object;
switch (prop_id)
{
case PROP_COUNT:
g_value_set_int (value, myobj->count);
break;
case PROP_NAME:
g_value_set_string (value, myobj->name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
my_object_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MyObject *myobj = (MyObject*)object;
switch (prop_id)
{
case PROP_COUNT:
myobj->count = g_value_get_int (value);
break;
case PROP_NAME:
g_free (myobj->name);
myobj->name = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
my_object_class_init (MyObjectClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
gobject_class->finalize = my_object_finalize;
gobject_class->set_property = my_object_set_property;
gobject_class->get_property = my_object_get_property;
g_object_class_install_property (gobject_class,
PROP_COUNT,
g_param_spec_int ("count",
"Count",
"Count",
0, 99999, 0,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_NAME,
g_param_spec_string ("name",
"Name",
"Name",
NULL,
G_PARAM_READWRITE));
}
/* A method that we want to export */
void
my_object_change_count (MyObject *myobj,
gint change)
{
myobj->count = 2 * myobj->count + change;
g_object_notify (G_OBJECT (myobj), "count");
}
static GDBusNodeInfo *introspection_data = NULL;
/* Introspection data for the service we are exporting */
static const gchar introspection_xml[] =
"<node>"
" <interface name='org.myorg.MyObject'>"
" <method name='ChangeCount'>"
" <arg type='i' name='change' direction='in'/>"
" </method>"
" <property type='i' name='Count' access='read'/>"
" <property type='s' name='Name' access='readwrite'/>"
" </interface>"
"</node>";
static void
handle_method_call (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
GDBusMethodInvocation *invocation,
gpointer user_data)
{
MyObject *myobj = user_data;
if (g_strcmp0 (method_name, "ChangeCount") == 0)
{
gint change;
g_variant_get (parameters, "(i)", &change);
my_object_change_count (myobj, change);
g_dbus_method_invocation_return_value (invocation, NULL);
}
}
static GVariant *
handle_get_property (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *property_name,
GError **error,
gpointer user_data)
{
GVariant *ret;
MyObject *myobj = user_data;
ret = NULL;
if (g_strcmp0 (property_name, "Count") == 0)
{
ret = g_variant_new_int32 (myobj->count);
}
else if (g_strcmp0 (property_name, "Name") == 0)
{
ret = g_variant_new_string (myobj->name ? myobj->name : "");
}
return ret;
}
static gboolean
handle_set_property (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *property_name,
GVariant *value,
GError **error,
gpointer user_data)
{
MyObject *myobj = user_data;
if (g_strcmp0 (property_name, "Count") == 0)
{
g_object_set (myobj, "count", g_variant_get_int32 (value), NULL);
}
else if (g_strcmp0 (property_name, "Name") == 0)
{
g_object_set (myobj, "name", g_variant_get_string (value, NULL), NULL);
}
return TRUE;
}
/* for now */
static const GDBusInterfaceVTable interface_vtable =
{
handle_method_call,
handle_get_property,
handle_set_property
};
static void
send_property_change (GObject *obj,
GParamSpec *pspec,
GDBusConnection *connection)
{
GVariantBuilder *builder;
MyObject *myobj = (MyObject *)obj;
builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
if (g_strcmp0 (pspec->name, "count") == 0)
g_variant_builder_add (builder,
"{sv}",
"Count", g_variant_new_int32 (myobj->count));
else if (g_strcmp0 (pspec->name, "name") == 0)
g_variant_builder_add (builder,
"{sv}",
"Name", g_variant_new_string (myobj->name ? myobj->name : ""));
g_dbus_connection_emit_signal (connection,
NULL,
"/org/myorg/MyObject",
"org.myorg.MyObject",
"PropertiesChanged",
g_variant_new ("(sa{sv})",
"org.myorg.MyObject",
builder),
NULL);
}
static void
on_bus_acquired (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
MyObject *myobj = user_data;
guint registration_id;
g_signal_connect (myobj, "notify",
G_CALLBACK (send_property_change), connection);
registration_id = g_dbus_connection_register_object (connection,
"/org/myorg/MyObject",
"org.myorg.MyObject",
introspection_data->interfaces[0],
&interface_vtable,
myobj,
NULL, /* user_data_free_func */
NULL); /* GError** */
g_assert (registration_id > 0);
}
static void
on_name_acquired (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
}
static void
on_name_lost (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
exit (1);
}
int
main (int argc, char *argv[])
{
guint owner_id;
GMainLoop *loop;
MyObject *myobj;
g_type_init ();
/* We are lazy here - we don't want to manually provide
* the introspection data structures - so we just build
* them from XML.
*/
introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
g_assert (introspection_data != NULL);
myobj = g_object_new (my_object_get_type (), NULL);
owner_id = g_bus_own_name (G_BUS_TYPE_SESSION,
"org.myorg.MyObject",
G_BUS_NAME_OWNER_FLAGS_NONE,
on_bus_acquired,
on_name_acquired,
on_name_lost,
myobj,
NULL);
loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (loop);
g_bus_unown_name (owner_id);
g_dbus_node_info_unref (introspection_data);
g_object_unref (myobj);
return 0;
}
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