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Reimplement Resource._setup_local_to_scene & deprecate signal #67080

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Sep 27, 2023
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Reimplement Resource._setup_local_to_scene & deprecate signal #67080

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3 changes: 2 additions & 1 deletion core/io/resource.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -379,8 +379,8 @@ Node *Resource::get_local_scene() const {
}

void Resource::setup_local_to_scene() {
// Can't use GDVIRTUAL in Resource, so this will have to be done with a signal
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emit_signal(SNAME("setup_local_to_scene_requested"));
GDVIRTUAL_CALL(_setup_local_to_scene);
}

void Resource::reset_local_to_scene() {
Expand Down Expand Up @@ -460,6 +460,7 @@ void Resource::_bind_methods() {
get_rid_bind.return_val.type = Variant::RID;

::ClassDB::add_virtual_method(get_class_static(), get_rid_bind, true, Vector<String>(), true);
GDVIRTUAL_BIND(_setup_local_to_scene);
}

Resource::Resource() :
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2 changes: 2 additions & 0 deletions core/io/resource.h
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Expand Up @@ -33,6 +33,7 @@

#include "core/io/resource_uid.h"
#include "core/object/class_db.h"
#include "core/object/gdvirtual.gen.inc"
#include "core/object/ref_counted.h"
#include "core/templates/safe_refcount.h"
#include "core/templates/self_list.h"
Expand Down Expand Up @@ -81,6 +82,7 @@ class Resource : public RefCounted {
void _take_over_path(const String &p_path);

virtual void reset_local_to_scene();
GDVIRTUAL0(_setup_local_to_scene);

public:
static Node *(*_get_local_scene_func)(); //used by editor
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24 changes: 20 additions & 4 deletions doc/classes/Resource.xml
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Expand Up @@ -19,6 +19,21 @@
Override this method to return a custom [RID] when [method get_rid] is called.
</description>
</method>
<method name="_setup_local_to_scene" qualifiers="virtual">
<return type="void" />
<description>
Override this method to customize the newly duplicated resource created from [method PackedScene.instantiate], if the original's [member resource_local_to_scene] is set to [code]true[/code].
[b]Example:[/b] Set a random [code]damage[/code] value to every local resource from an instantiated scene.
[codeblock]
extends Resource

var damage = 0

func _setup_local_to_scene():
damage = randi_range(10, 40)
[/codeblock]
</description>
</method>
<method name="duplicate" qualifiers="const">
<return type="Resource" />
<param index="0" name="subresources" type="bool" default="false" />
Expand Down Expand Up @@ -58,8 +73,8 @@
<method name="setup_local_to_scene" is_deprecated="true">
<return type="void" />
<description>
Emits the [signal setup_local_to_scene_requested] signal. If [member resource_local_to_scene] is set to [code]true[/code], this method is called from [method PackedScene.instantiate] by the newly duplicated resource within the scene instance.
For most resources, this method performs no logic of its own. Custom behavior can be defined by connecting [signal setup_local_to_scene_requested] from a script, [b]not[/b] by overriding this method.
Calls [method _setup_local_to_scene]. If [member resource_local_to_scene] is set to [code]true[/code], this method is automatically called from [method PackedScene.instantiate] by the newly duplicated resource within the scene instance.
[i]Deprecated.[/i] This method should only be called internally. Override [method _setup_local_to_scene] instead.
</description>
</method>
<method name="take_over_path">
Expand Down Expand Up @@ -90,9 +105,10 @@
[b]Note:[/b] This signal is not emitted automatically for properties of custom resources. If necessary, a setter needs to be created to emit the signal.
</description>
</signal>
<signal name="setup_local_to_scene_requested">
<signal name="setup_local_to_scene_requested" is_deprecated="true">
<description>
Emitted by the newly duplicated resource with [member resource_local_to_scene] set to [code]true[/code], when the scene is instantiated. Custom behavior can be defined by connecting this signal.
Emitted by a newly duplicated resource with [member resource_local_to_scene] set to [code]true[/code].
[i]Deprecated.[/i] This signal is only emitted when the resource is created. Override [method _setup_local_to_scene] instead.
</description>
</signal>
</signals>
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