474 lines
19 KiB
XML
474 lines
19 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="Object" category="Core" version="3.1.2">
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<brief_description>
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Base class for all non built-in types.
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</brief_description>
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<description>
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Every class which is not a built-in type inherits from this class.
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You can construct Objects from scripting languages, using [code]Object.new()[/code] in GDScript, [code]new Object[/code] in C#, or the "Construct Object" node in VisualScript.
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Objects do not manage memory. If a class inherits from Object, you will have to delete instances of it manually. To do so, call the [method free] method from your script or delete the instance from C++.
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Some classes that extend Object add memory management. This is the case of [Reference], which counts references and deletes itself automatically when no longer referenced. [Node], another fundamental type, deletes all its children when freed from memory.
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Objects export properties, which are mainly useful for storage and editing, but not really so much in programming. Properties are exported in [method _get_property_list] and handled in [method _get] and [method _set]. However, scripting languages and C++ have simpler means to export them.
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Objects also receive notifications. Notifications are a simple way to notify the object about different events, so they can all be handled together. See [method _notification].
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</description>
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<tutorials>
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</tutorials>
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<methods>
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<method name="_get" qualifiers="virtual">
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<return type="Variant">
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</return>
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<argument index="0" name="property" type="String">
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</argument>
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<description>
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Virtual method which can be overridden to customize the return value of [method get].
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Returns the given property. Returns [code]null[/code] if the [code]property[/code] does not exist.
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</description>
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</method>
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<method name="_get_property_list" qualifiers="virtual">
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<return type="Array">
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</return>
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<description>
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Virtual method which can be overridden to customize the return value of [method get_property_list].
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Returns the object's property list as an [Array] of dictionaries.
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Each property's [Dictionary] must contain at least [code]name: String[/code] and [code]type: int[/code] (see [enum @GlobalScope.Variant.Type]) entries. Optionally, it can also include [code]hint: int[/code] (see [enum @GlobalScope.PropertyHint]), [code]hint_string: String[/code], and [code]usage: int[/code] (see [enum @GlobalScope.PropertyUsageFlags]).
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</description>
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</method>
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<method name="_init" qualifiers="virtual">
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<return type="void">
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</return>
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<description>
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Called when the object is initialized.
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</description>
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</method>
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<method name="_notification" qualifiers="virtual">
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<return type="void">
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</return>
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<argument index="0" name="what" type="int">
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</argument>
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<description>
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Called whenever the object receives a notification, which is identified in [code]what[/code] by a constant. The base [Object] has two constants [constant NOTIFICATION_POSTINITIALIZE] and [constant NOTIFICATION_PREDELETE], but subclasses such as [Node] define a lot more notifications which are also received by this method.
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</description>
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</method>
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<method name="_set" qualifiers="virtual">
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<return type="bool">
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</return>
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<argument index="0" name="property" type="String">
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</argument>
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<argument index="1" name="value" type="Variant">
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</argument>
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<description>
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Virtual method which can be overridden to customize the return value of [method set].
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Sets a property. Returns [code]true[/code] if the [code]property[/code] exists.
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</description>
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</method>
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<method name="add_user_signal">
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<return type="void">
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</return>
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<argument index="0" name="signal" type="String">
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</argument>
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<argument index="1" name="arguments" type="Array" default="[ ]">
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</argument>
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<description>
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Adds a user-defined [code]signal[/code]. Arguments are optional, but can be added as an [Array] of dictionaries, each containing [code]name: String[/code] and [code]type: int[/code] (see [enum @GlobalScope.Variant.Type]) entries.
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</description>
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</method>
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<method name="call" qualifiers="vararg">
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<return type="Variant">
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</return>
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<argument index="0" name="method" type="String">
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</argument>
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<description>
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Calls the [code]method[/code] on the object and returns the result. This method supports a variable number of arguments, so parameters are passed as a comma separated list. Example:
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[codeblock]
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call("set", "position", Vector2(42.0, 0.0))
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[/codeblock]
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</description>
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</method>
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<method name="call_deferred" qualifiers="vararg">
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<return type="Variant">
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</return>
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<argument index="0" name="method" type="String">
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</argument>
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<description>
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Calls the [code]method[/code] on the object during idle time and returns the result. This method supports a variable number of arguments, so parameters are passed as a comma separated list. Example:
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[codeblock]
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call_deferred("set", "position", Vector2(42.0, 0.0))
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[/codeblock]
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</description>
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</method>
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<method name="callv">
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<return type="Variant">
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</return>
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<argument index="0" name="method" type="String">
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</argument>
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<argument index="1" name="arg_array" type="Array">
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</argument>
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<description>
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Calls the [code]method[/code] on the object and returns the result. Contrarily to [method call], this method does not support a variable number of arguments but expected all parameters passed via a single [Array].
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[codeblock]
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callv("set", [ "position", Vector2(42.0, 0.0) ])
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[/codeblock]
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</description>
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</method>
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<method name="can_translate_messages" qualifiers="const">
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<return type="bool">
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</return>
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<description>
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Returns [code]true[/code] if the object can translate strings. See [method set_message_translation] and [method tr].
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</description>
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</method>
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<method name="connect">
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<return type="int" enum="Error">
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</return>
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<argument index="0" name="signal" type="String">
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</argument>
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<argument index="1" name="target" type="Object">
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</argument>
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<argument index="2" name="method" type="String">
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</argument>
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<argument index="3" name="binds" type="Array" default="[ ]">
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</argument>
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<argument index="4" name="flags" type="int" default="0">
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</argument>
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<description>
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Connects a [code]signal[/code] to a [code]method[/code] on a [code]target[/code] object. Pass optional [code]binds[/code] to the call as an [Array] of parameters. Use [code]flags[/code] to set deferred or one shot connections. See [enum ConnectFlags] constants.
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A [code]signal[/code] can only be connected once to a [code]method[/code]. It will throw an error if already connected, unless the signal was connected with [constant CONNECT_REFERENCE_COUNTED]. To avoid this, first, use [method is_connected] to check for existing connections.
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If the [code]target[/code] is destroyed in the game's lifecycle, the connection will be lost.
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Examples:
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[codeblock]
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connect("pressed", self, "_on_Button_pressed") # BaseButton signal
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connect("text_entered", self, "_on_LineEdit_text_entered") # LineEdit signal
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connect("hit", self, "_on_Player_hit", [ weapon_type, damage ]) # User-defined signal
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[/codeblock]
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</description>
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</method>
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<method name="disconnect">
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<return type="void">
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</return>
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<argument index="0" name="signal" type="String">
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</argument>
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<argument index="1" name="target" type="Object">
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</argument>
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<argument index="2" name="method" type="String">
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</argument>
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<description>
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Disconnects a [code]signal[/code] from a [code]method[/code] on the given [code]target[/code].
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If you try to disconnect a connection that does not exist, the method will throw an error. Use [method is_connected] to ensure that the connection exists.
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</description>
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</method>
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<method name="emit_signal" qualifiers="vararg">
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<return type="Variant">
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</return>
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<argument index="0" name="signal" type="String">
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</argument>
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<description>
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Emits the given [code]signal[/code]. The signal must exist, so it should be a built-in signal of this class or one of its parent classes, or a user-defined signal. This method supports a variable number of arguments, so parameters are passed as a comma separated list. Example:
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[codeblock]
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emit_signal("hit", weapon_type, damage)
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emit_signal("game_over")
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[/codeblock]
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</description>
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</method>
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<method name="free">
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<return type="void">
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</return>
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<description>
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Deletes the object from memory. Any pre-existing reference to the freed object will now return [code]null[/code].
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</description>
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</method>
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<method name="get" qualifiers="const">
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<return type="Variant">
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</return>
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<argument index="0" name="property" type="String">
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</argument>
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<description>
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Returns the [Variant] value of the given [code]property[/code].
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</description>
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</method>
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<method name="get_class" qualifiers="const">
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<return type="String">
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</return>
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<description>
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Returns the object's class as a [String].
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</description>
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</method>
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<method name="get_incoming_connections" qualifiers="const">
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<return type="Array">
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</return>
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<description>
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Returns an [Array] of dictionaries with information about signals that are connected to the object.
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Each [Dictionary] contains three String entries:
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- [code]source[/code] is a reference to the signal emitter.
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- [code]signal_name[/code] is the name of the connected signal.
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- [code]method_name[/code] is the name of the method to which the signal is connected.
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</description>
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</method>
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<method name="get_indexed" qualifiers="const">
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<return type="Variant">
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</return>
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<argument index="0" name="property" type="NodePath">
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</argument>
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<description>
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Get the object's property indexed by the given [NodePath]. The node path should be relative to the current object and can use the colon character ([code]:[/code]) to access nested properties. Examples: [code]"position:x"[/code] or [code]"material:next_pass:blend_mode"[/code].
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</description>
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</method>
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<method name="get_instance_id" qualifiers="const">
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<return type="int">
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</return>
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<description>
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Returns the object's unique instance ID.
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This ID can be saved in [EncodedObjectAsID], and can be used to retrieve the object instance with [method @GDScript.instance_from_id].
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</description>
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</method>
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<method name="get_meta" qualifiers="const">
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<return type="Variant">
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</return>
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<argument index="0" name="name" type="String">
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</argument>
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<description>
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Returns the object's metadata entry for the given [code]name[/code].
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</description>
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</method>
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<method name="get_meta_list" qualifiers="const">
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<return type="PoolStringArray">
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</return>
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<description>
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Returns the object's metadata as a [PoolStringArray].
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</description>
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</method>
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<method name="get_method_list" qualifiers="const">
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<return type="Array">
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</return>
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<description>
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Returns the object's methods and their signatures as an [Array].
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</description>
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</method>
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<method name="get_property_list" qualifiers="const">
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<return type="Array">
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</return>
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<description>
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Returns the object's property list as an [Array] of dictionaries.
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Each property's [Dictionary] contain at least [code]name: String[/code] and [code]type: int[/code] (see [enum @GlobalScope.Variant.Type]) entries. Optionally, it can also include [code]hint: int[/code] (see [enum @GlobalScope.PropertyHint]), [code]hint_string: String[/code], and [code]usage: int[/code] (see [enum @GlobalScope.PropertyUsageFlags]).
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</description>
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</method>
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<method name="get_script" qualifiers="const">
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<return type="Reference">
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</return>
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<description>
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Returns the object's [Script] instance, or [code]null[/code] if none is assigned.
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</description>
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</method>
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<method name="get_signal_connection_list" qualifiers="const">
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<return type="Array">
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</return>
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<argument index="0" name="signal" type="String">
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</argument>
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<description>
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Returns an [Array] of connections for the given [code]signal[/code].
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</description>
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</method>
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<method name="get_signal_list" qualifiers="const">
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<return type="Array">
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</return>
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<description>
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Returns the list of signals as an [Array] of dictionaries.
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</description>
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</method>
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<method name="has_meta" qualifiers="const">
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<return type="bool">
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</return>
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<argument index="0" name="name" type="String">
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</argument>
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<description>
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Returns [code]true[/code] if a metadata entry is found with the given [code]name[/code].
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</description>
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</method>
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<method name="has_method" qualifiers="const">
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<return type="bool">
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</return>
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<argument index="0" name="method" type="String">
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</argument>
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<description>
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Returns [code]true[/code] if the object contains the given [code]method[/code].
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</description>
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</method>
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<method name="has_user_signal" qualifiers="const">
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<return type="bool">
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</return>
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<argument index="0" name="signal" type="String">
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</argument>
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<description>
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Returns [code]true[/code] if the given user-defined [code]signal[/code] exists.
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</description>
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</method>
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<method name="is_blocking_signals" qualifiers="const">
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<return type="bool">
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</return>
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<description>
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Returns [code]true[/code] if signal emission blocking is enabled.
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</description>
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</method>
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<method name="is_class" qualifiers="const">
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<return type="bool">
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</return>
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<argument index="0" name="class" type="String">
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</argument>
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<description>
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Returns [code]true[/code] if the object inherits from the given [code]class[/code].
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</description>
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</method>
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<method name="is_connected" qualifiers="const">
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<return type="bool">
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</return>
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<argument index="0" name="signal" type="String">
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</argument>
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<argument index="1" name="target" type="Object">
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</argument>
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<argument index="2" name="method" type="String">
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</argument>
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<description>
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Returns [code]true[/code] if a connection exists for a given [code]signal[/code], [code]target[/code], and [code]method[/code].
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</description>
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</method>
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<method name="is_queued_for_deletion" qualifiers="const">
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<return type="bool">
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</return>
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<description>
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Returns [code]true[/code] if the [method Node.queue_free] method was called for the object.
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</description>
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</method>
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<method name="notification">
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<return type="void">
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</return>
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<argument index="0" name="what" type="int">
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</argument>
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<argument index="1" name="reversed" type="bool" default="false">
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</argument>
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<description>
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Send a given notification to the object, which will also trigger a call to the [method _notification] method of all classes that the object inherits from.
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If [code]reversed[/code] is [code]true[/code], [method _notification] is called first on the object's own class, and then up to its successive parent classes. If [code]reversed[/code] is [code]false[/code], [method _notification] is called first on the highest ancestor ([Object] itself), and then down to its successive inheriting classes.
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</description>
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</method>
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<method name="property_list_changed_notify">
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<return type="void">
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</return>
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<description>
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Notify the editor that the property list has changed, so that editor plugins can take the new values into account. Does nothing on export builds.
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</description>
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</method>
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<method name="set">
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<return type="void">
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</return>
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<argument index="0" name="property" type="String">
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</argument>
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<argument index="1" name="value" type="Variant">
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</argument>
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<description>
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Assigns a new value to the given property. If the [code]property[/code] does not exist, nothing will happen.
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</description>
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</method>
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<method name="set_block_signals">
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<return type="void">
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</return>
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<argument index="0" name="enable" type="bool">
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</argument>
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<description>
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If set to [code]true[/code], signal emission is blocked.
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</description>
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</method>
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<method name="set_deferred">
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<return type="void">
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</return>
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<argument index="0" name="property" type="String">
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</argument>
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<argument index="1" name="value" type="Variant">
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</argument>
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<description>
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Assigns a new value to the given property, after the current frame's physics step. This is equivalent to calling [method set] via [method call_deferred], i.e. [code]call_deferred("set", property, value)[/code].
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</description>
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</method>
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<method name="set_indexed">
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<return type="void">
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</return>
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<argument index="0" name="property" type="NodePath">
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</argument>
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<argument index="1" name="value" type="Variant">
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</argument>
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<description>
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Assigns a new value to the property identified by the [NodePath]. The node path should be relative to the current object and can use the colon character ([code]:[/code]) to access nested properties. Example:
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[codeblock]
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set_indexed("position", Vector2(42, 0))
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set_indexed("position:y", -10)
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print(position) # (42, -10)
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[/codeblock]
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</description>
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</method>
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<method name="set_message_translation">
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<return type="void">
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</return>
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<argument index="0" name="enable" type="bool">
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</argument>
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<description>
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Defines whether the object can translate strings (with calls to [method tr]). Default is [code]true[/code].
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</description>
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</method>
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<method name="set_meta">
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<return type="void">
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</return>
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<argument index="0" name="name" type="String">
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</argument>
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<argument index="1" name="value" type="Variant">
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</argument>
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<description>
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Adds or changes a given entry in the object's metadata. Metadata are serialized, and can take any [Variant] value.
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</description>
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</method>
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<method name="set_script">
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<return type="void">
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</return>
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<argument index="0" name="script" type="Reference">
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</argument>
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<description>
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Assigns a script to the object. Each object can have a single script assigned to it, which are used to extend its functionality.
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</description>
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</method>
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<method name="tr" qualifiers="const">
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<return type="String">
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</return>
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<argument index="0" name="message" type="String">
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</argument>
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<description>
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Translates a message using translation catalogs configured in the Project Settings.
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Only works if message translation is enabled (which it is by default), otherwise it returns the [code]message[/code] unchanged. See [method set_message_translation].
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</description>
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</method>
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</methods>
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<signals>
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<signal name="script_changed">
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<description>
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Emitted whenever the object's script is changed.
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</description>
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</signal>
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</signals>
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<constants>
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<constant name="NOTIFICATION_POSTINITIALIZE" value="0">
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Called right when the object is initialized. Not available in script.
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</constant>
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<constant name="NOTIFICATION_PREDELETE" value="1">
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Called before the object is about to be deleted.
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</constant>
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<constant name="CONNECT_DEFERRED" value="1" enum="ConnectFlags">
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|
Connect a signal in deferred mode. This way, signal emissions are stored in a queue, then set on idle time.
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</constant>
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<constant name="CONNECT_PERSIST" value="2" enum="ConnectFlags">
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|
Persisting connections are saved when the object is serialized to file.
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</constant>
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<constant name="CONNECT_ONESHOT" value="4" enum="ConnectFlags">
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|
One shot connections disconnect themselves after emission.
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|
</constant>
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|
<constant name="CONNECT_REFERENCE_COUNTED" value="8" enum="ConnectFlags">
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|
Connect a signal as reference counted. This means that a given signal can be connected several times to the same target, and will only be fully disconnected once no references are left.
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</constant>
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|
</constants>
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</class>
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