Class method
GObjectObjectClassinstall_properties
since: 2.26
Declaration
void
g_object_class_install_properties (
GObjectClass* oclass,
guint n_pspecs,
GParamSpec** pspecs
)
Description
Installs new properties from an array of GParamSpecs.
All properties should be installed during the class initializer. It is possible to install properties after that, but doing so is not recommend, and specifically, is not guaranteed to be thread-safe vs. use of properties on the same type on other threads.
The property id of each property is the index of each GParamSpec in
the pspecs array.
The property id of 0 is treated specially by GObject and it should not
be used to store a GParamSpec.
This function should be used if you plan to use a static array of
GParamSpecs and g_object_notify_by_pspec(). For instance, this
class initialization:
typedef enum {
PROP_FOO = 1,
PROP_BAR,
N_PROPERTIES
} MyObjectProperty;
static GParamSpec *obj_properties[N_PROPERTIES] = { NULL, };
static void
my_object_class_init (MyObjectClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
obj_properties[PROP_FOO] =
g_param_spec_int ("foo", NULL, NULL,
-1, G_MAXINT,
0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
obj_properties[PROP_BAR] =
g_param_spec_string ("bar", NULL, NULL,
NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
gobject_class->set_property = my_object_set_property;
gobject_class->get_property = my_object_get_property;
g_object_class_install_properties (gobject_class,
G_N_ELEMENTS (obj_properties),
obj_properties);
}
allows calling g_object_notify_by_pspec() to notify of property changes:
void
my_object_set_foo (MyObject *self, gint foo)
{
if (self->foo != foo)
{
self->foo = foo;
g_object_notify_by_pspec (G_OBJECT (self), obj_properties[PROP_FOO]);
}
}
Available since: 2.26