godot-docs/classes/class_object.rst

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.. _class_Object:

Object
======

**Inherited By:** :ref:`Reference<class_reference>`, :ref:`Physics2DServer<class_physics2dserver>`, :ref:`Input<class_input>`, :ref:`Node<class_node>`, :ref:`Geometry<class_geometry>`, :ref:`ARVRPositionalTracker<class_arvrpositionaltracker>`, :ref:`TreeItem<class_treeitem>`, :ref:`PhysicsDirectBodyState<class_physicsdirectbodystate>`, :ref:`ARVRServer<class_arvrserver>`, :ref:`PhysicsDirectSpaceState<class_physicsdirectspacestate>`, :ref:`Engine<class_engine>`, :ref:`Physics2DDirectSpaceState<class_physics2ddirectspacestate>`, :ref:`MainLoop<class_mainloop>`, :ref:`InputMap<class_inputmap>`, :ref:`UndoRedo<class_undoredo>`, :ref:`PhysicsServer<class_physicsserver>`, :ref:`ProjectSettings<class_projectsettings>`, :ref:`ResourceSaver<class_resourcesaver>`, :ref:`Performance<class_performance>`, :ref:`ResourceLoader<class_resourceloader>`, :ref:`AudioServer<class_audioserver>`, :ref:`VisualServer<class_visualserver>`, :ref:`IP<class_ip>`, :ref:`ClassDB<class_classdb>`, :ref:`OS<class_os>`, :ref:`EditorSelection<class_editorselection>`, :ref:`Physics2DDirectBodyState<class_physics2ddirectbodystate>`, :ref:`TranslationServer<class_translationserver>`, :ref:`EditorFileSystemDirectory<class_editorfilesystemdirectory>`

**Category:** Core

Brief Description
-----------------

Base class for all non built-in types.

Member Functions
----------------

+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`_get<class_Object__get>`  **(** :ref:`String<class_string>` property  **)** virtual                                                                                                                                          |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Array<class_array>`                      | :ref:`_get_property_list<class_Object__get_property_list>`  **(** **)** virtual                                                                                                                                                    |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`_init<class_Object__init>`  **(** **)** virtual                                                                                                                                                                              |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`_notification<class_Object__notification>`  **(** :ref:`int<class_int>` what  **)** virtual                                                                                                                                  |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`_set<class_Object__set>`  **(** :ref:`String<class_string>` property, :ref:`Variant<class_variant>` value  **)** virtual                                                                                                     |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`add_user_signal<class_Object_add_user_signal>`  **(** :ref:`String<class_string>` signal, :ref:`Array<class_array>` arguments=[  ]  **)**                                                                                    |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Variant<class_variant>`                  | :ref:`call<class_Object_call>`  **(** :ref:`String<class_string>` method  **)** vararg                                                                                                                                             |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Variant<class_variant>`                  | :ref:`call_deferred<class_Object_call_deferred>`  **(** :ref:`String<class_string>` method  **)** vararg                                                                                                                           |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Variant<class_variant>`                  | :ref:`callv<class_Object_callv>`  **(** :ref:`String<class_string>` method, :ref:`Array<class_array>` arg_array  **)**                                                                                                             |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`can_translate_messages<class_Object_can_translate_messages>`  **(** **)** const                                                                                                                                              |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`                          | :ref:`connect<class_Object_connect>`  **(** :ref:`String<class_string>` signal, :ref:`Object<class_object>` target, :ref:`String<class_string>` method, :ref:`Array<class_array>` binds=[  ], :ref:`int<class_int>` flags=0  **)** |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`disconnect<class_Object_disconnect>`  **(** :ref:`String<class_string>` signal, :ref:`Object<class_object>` target, :ref:`String<class_string>` method  **)**                                                                |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Variant<class_variant>`                  | :ref:`emit_signal<class_Object_emit_signal>`  **(** :ref:`String<class_string>` signal  **)** vararg                                                                                                                               |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`free<class_Object_free>`  **(** **)**                                                                                                                                                                                        |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Variant<class_variant>`                  | :ref:`get<class_Object_get>`  **(** :ref:`String<class_string>` property  **)** const                                                                                                                                              |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_string>`                    | :ref:`get_class<class_Object_get_class>`  **(** **)** const                                                                                                                                                                        |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Array<class_array>`                      | :ref:`get_incoming_connections<class_Object_get_incoming_connections>`  **(** **)** const                                                                                                                                          |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`                          | :ref:`get_instance_id<class_Object_get_instance_id>`  **(** **)** const                                                                                                                                                            |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Variant<class_variant>`                  | :ref:`get_meta<class_Object_get_meta>`  **(** :ref:`String<class_string>` name  **)** const                                                                                                                                        |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PoolStringArray<class_poolstringarray>`  | :ref:`get_meta_list<class_Object_get_meta_list>`  **(** **)** const                                                                                                                                                                |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Array<class_array>`                      | :ref:`get_method_list<class_Object_get_method_list>`  **(** **)** const                                                                                                                                                            |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Array<class_array>`                      | :ref:`get_property_list<class_Object_get_property_list>`  **(** **)** const                                                                                                                                                        |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Reference<class_reference>`              | :ref:`get_script<class_Object_get_script>`  **(** **)** const                                                                                                                                                                      |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Array<class_array>`                      | :ref:`get_signal_connection_list<class_Object_get_signal_connection_list>`  **(** :ref:`String<class_string>` signal  **)** const                                                                                                  |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Array<class_array>`                      | :ref:`get_signal_list<class_Object_get_signal_list>`  **(** **)** const                                                                                                                                                            |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`has_meta<class_Object_has_meta>`  **(** :ref:`String<class_string>` name  **)** const                                                                                                                                        |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`has_method<class_Object_has_method>`  **(** :ref:`String<class_string>` method  **)** const                                                                                                                                  |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`has_user_signal<class_Object_has_user_signal>`  **(** :ref:`String<class_string>` signal  **)** const                                                                                                                        |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`is_blocking_signals<class_Object_is_blocking_signals>`  **(** **)** const                                                                                                                                                    |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`is_class<class_Object_is_class>`  **(** :ref:`String<class_string>` type  **)** const                                                                                                                                        |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`is_connected<class_Object_is_connected>`  **(** :ref:`String<class_string>` signal, :ref:`Object<class_object>` target, :ref:`String<class_string>` method  **)** const                                                      |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>`                        | :ref:`is_queued_for_deletion<class_Object_is_queued_for_deletion>`  **(** **)** const                                                                                                                                              |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`notification<class_Object_notification>`  **(** :ref:`int<class_int>` what, :ref:`bool<class_bool>` reversed=false  **)**                                                                                                    |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`property_list_changed_notify<class_Object_property_list_changed_notify>`  **(** **)**                                                                                                                                        |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`set<class_Object_set>`  **(** :ref:`String<class_string>` property, :ref:`Variant<class_variant>` value  **)**                                                                                                               |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`set_block_signals<class_Object_set_block_signals>`  **(** :ref:`bool<class_bool>` enable  **)**                                                                                                                              |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`set_message_translation<class_Object_set_message_translation>`  **(** :ref:`bool<class_bool>` enable  **)**                                                                                                                  |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`set_meta<class_Object_set_meta>`  **(** :ref:`String<class_string>` name, :ref:`Variant<class_variant>` value  **)**                                                                                                         |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                           | :ref:`set_script<class_Object_set_script>`  **(** :ref:`Reference<class_reference>` script  **)**                                                                                                                                  |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_string>`                    | :ref:`tr<class_Object_tr>`  **(** :ref:`String<class_string>` message  **)** const                                                                                                                                                 |
+------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

Signals
-------

-  **script_changed**  **(** **)**

Numeric Constants
-----------------

- **NOTIFICATION_POSTINITIALIZE** = **0** --- Called right when the object is initialized. Not available in script.
- **NOTIFICATION_PREDELETE** = **1** --- Called before the object is about to be deleted.
- **CONNECT_DEFERRED** = **1** --- Connect a signal in deferred mode. This way, signal emissions are stored in a queue, then set on idle time.
- **CONNECT_PERSIST** = **2** --- Persisting connections are saved when the object is serialized to file.
- **CONNECT_ONESHOT** = **4** --- One shot connections disconnect themselves after emission.

Description
-----------

Base class for all non built-in types. Everything not a built-in type starts the inheritance chain from this class.

Objects do not manage memory, if inheriting from one the object will most likely have to be deleted manually (call the :ref:`free<class_Object_free>` function from the script or delete from C++).

Some derivates add memory management, such as :ref:`Reference<class_reference>` (which keeps a reference count and deletes itself automatically when no longer referenced) and :ref:`Node<class_node>`, which deletes the children tree when deleted.

Objects export properties, which are mainly useful for storage and editing, but not really so much in programming. Properties are exported in :ref:`_get_property_list<class_Object__get_property_list>` and handled in :ref:`_get<class_Object__get>` and :ref:`_set<class_Object__set>`. However, scripting languages and C++ have simpler means to export them.

Objects also receive notifications (:ref:`_notification<class_Object__notification>`). Notifications are a simple way to notify the object about simple events, so they can all be handled together.

Member Function Description
---------------------------

.. _class_Object__get:

- void  **_get**  **(** :ref:`String<class_string>` property  **)** virtual

Return a property, return null if the property does not exist.

.. _class_Object__get_property_list:

- :ref:`Array<class_array>`  **_get_property_list**  **(** **)** virtual

Return the property list, array of dictionaries, dictionaries must contain: name:String, type:int (see TYPE\_\* enum in :ref:`@Global Scope<class_@global scope>`) and optionally: hint:int (see PROPERTY_HINT\_\* in :ref:`@Global Scope<class_@global scope>`), hint_string:String, usage:int (see PROPERTY_USAGE\_\* in :ref:`@Global Scope<class_@global scope>`).

.. _class_Object__init:

- void  **_init**  **(** **)** virtual

.. _class_Object__notification:

- void  **_notification**  **(** :ref:`int<class_int>` what  **)** virtual

Notification request, the notification id is received.

.. _class_Object__set:

- :ref:`bool<class_bool>`  **_set**  **(** :ref:`String<class_string>` property, :ref:`Variant<class_variant>` value  **)** virtual

Set a property. Return true if the property was found.

.. _class_Object_add_user_signal:

- void  **add_user_signal**  **(** :ref:`String<class_string>` signal, :ref:`Array<class_array>` arguments=[  ]  **)**

Add a user signal (can be added anytime). Arguments are optional, but can be added as an array of dictionaries, each containing "name" and "type" (from :ref:`@Global Scope<class_@global scope>` TYPE\_\*).

.. _class_Object_call:

- :ref:`Variant<class_variant>`  **call**  **(** :ref:`String<class_string>` method  **)** vararg

.. _class_Object_call_deferred:

- :ref:`Variant<class_variant>`  **call_deferred**  **(** :ref:`String<class_string>` method  **)** vararg

.. _class_Object_callv:

- :ref:`Variant<class_variant>`  **callv**  **(** :ref:`String<class_string>` method, :ref:`Array<class_array>` arg_array  **)**

.. _class_Object_can_translate_messages:

- :ref:`bool<class_bool>`  **can_translate_messages**  **(** **)** const

Return true if this object can translate strings.

.. _class_Object_connect:

- :ref:`int<class_int>`  **connect**  **(** :ref:`String<class_string>` signal, :ref:`Object<class_object>` target, :ref:`String<class_string>` method, :ref:`Array<class_array>` binds=[  ], :ref:`int<class_int>` flags=0  **)**

Connect a signal to a method at a target (member function). Binds are optional and are passed as extra arguments to the call. Flags specify optional deferred or one shot connections, see enum CONNECT\_\*. A signal can only be connected once to a method, and it will throw an error if already connected. If you want to avoid this, use :ref:`is_connected<class_Object_is_connected>` to check.

.. _class_Object_disconnect:

- void  **disconnect**  **(** :ref:`String<class_string>` signal, :ref:`Object<class_object>` target, :ref:`String<class_string>` method  **)**

Disconnect a signal from a method.

.. _class_Object_emit_signal:

- :ref:`Variant<class_variant>`  **emit_signal**  **(** :ref:`String<class_string>` signal  **)** vararg

.. _class_Object_free:

- void  **free**  **(** **)**

.. _class_Object_get:

- :ref:`Variant<class_variant>`  **get**  **(** :ref:`String<class_string>` property  **)** const

Get a property from the object.

.. _class_Object_get_class:

- :ref:`String<class_string>`  **get_class**  **(** **)** const

Return the class of the object as a string.

.. _class_Object_get_incoming_connections:

- :ref:`Array<class_array>`  **get_incoming_connections**  **(** **)** const

Returns an :ref:`Array<class_array>` of dictionaries with informations about signals that are connected to this object.

Inside each :ref:`Dictionary<class_dictionary>` there are 3 fields:

- "source" is a reference to signal emitter.

- "signal_name" is name of connected signal.

- "method_name" is a name of method to which signal is connected.

.. _class_Object_get_instance_id:

- :ref:`int<class_int>`  **get_instance_id**  **(** **)** const

Return the instance ID. All objects have a unique instance ID.

.. _class_Object_get_meta:

- :ref:`Variant<class_variant>`  **get_meta**  **(** :ref:`String<class_string>` name  **)** const

Return a metadata from the object.

.. _class_Object_get_meta_list:

- :ref:`PoolStringArray<class_poolstringarray>`  **get_meta_list**  **(** **)** const

Return the list of metadata in the object.

.. _class_Object_get_method_list:

- :ref:`Array<class_array>`  **get_method_list**  **(** **)** const

.. _class_Object_get_property_list:

- :ref:`Array<class_array>`  **get_property_list**  **(** **)** const

Return the list of properties as an array of dictionaries, dictionaries contain: name:String, type:int (see TYPE\_\* enum in :ref:`@Global Scope<class_@global scope>`) and optionally: hint:int (see PROPERTY_HINT\_\* in :ref:`@Global Scope<class_@global scope>`), hint_string:String, usage:int (see PROPERTY_USAGE\_\* in :ref:`@Global Scope<class_@global scope>`).

.. _class_Object_get_script:

- :ref:`Reference<class_reference>`  **get_script**  **(** **)** const

Return the object script (or null if it doesn't have one).

.. _class_Object_get_signal_connection_list:

- :ref:`Array<class_array>`  **get_signal_connection_list**  **(** :ref:`String<class_string>` signal  **)** const

.. _class_Object_get_signal_list:

- :ref:`Array<class_array>`  **get_signal_list**  **(** **)** const

Return the list of signals as an array of dictionaries.

.. _class_Object_has_meta:

- :ref:`bool<class_bool>`  **has_meta**  **(** :ref:`String<class_string>` name  **)** const

Return true if a metadata is found with the requested name.

.. _class_Object_has_method:

- :ref:`bool<class_bool>`  **has_method**  **(** :ref:`String<class_string>` method  **)** const

.. _class_Object_has_user_signal:

- :ref:`bool<class_bool>`  **has_user_signal**  **(** :ref:`String<class_string>` signal  **)** const

.. _class_Object_is_blocking_signals:

- :ref:`bool<class_bool>`  **is_blocking_signals**  **(** **)** const

Return true if signal emission blocking is enabled.

.. _class_Object_is_class:

- :ref:`bool<class_bool>`  **is_class**  **(** :ref:`String<class_string>` type  **)** const

Check the class of the object against a string (including inheritance).

.. _class_Object_is_connected:

- :ref:`bool<class_bool>`  **is_connected**  **(** :ref:`String<class_string>` signal, :ref:`Object<class_object>` target, :ref:`String<class_string>` method  **)** const

Return true if a connection exists for a given signal and target/method.

.. _class_Object_is_queued_for_deletion:

- :ref:`bool<class_bool>`  **is_queued_for_deletion**  **(** **)** const

.. _class_Object_notification:

- void  **notification**  **(** :ref:`int<class_int>` what, :ref:`bool<class_bool>` reversed=false  **)**

Notify the object of something.

.. _class_Object_property_list_changed_notify:

- void  **property_list_changed_notify**  **(** **)**

.. _class_Object_set:

- void  **set**  **(** :ref:`String<class_string>` property, :ref:`Variant<class_variant>` value  **)**

Set property into the object.

.. _class_Object_set_block_signals:

- void  **set_block_signals**  **(** :ref:`bool<class_bool>` enable  **)**

If set to true, signal emission is blocked.

.. _class_Object_set_message_translation:

- void  **set_message_translation**  **(** :ref:`bool<class_bool>` enable  **)**

Define whether this object can translate strings (with calls to :ref:`tr<class_Object_tr>`). Default is true.

.. _class_Object_set_meta:

- void  **set_meta**  **(** :ref:`String<class_string>` name, :ref:`Variant<class_variant>` value  **)**

Set a metadata into the object. Metadata is serialized. Metadata can be *anything*.

.. _class_Object_set_script:

- void  **set_script**  **(** :ref:`Reference<class_reference>` script  **)**

Set a script into the object, scripts extend the object functionality.

.. _class_Object_tr:

- :ref:`String<class_string>`  **tr**  **(** :ref:`String<class_string>` message  **)** const

Translate a message. Only works if message translation is enabled (which it is by default). See :ref:`set_message_translation<class_Object_set_message_translation>`.