-Added way to generate resource previews from script plugin.

-Updated documentation

6 files changed, 237 insertions, 126 deletions

diff --git a/doc/base/classes.xml b/doc/base/classes.xml
index 1ac08c788f..842f38dd3e 100644
--- a/doc/base/classes.xml
+++ b/doc/base/classes.xml
@@ -11510,6 +11510,13 @@
 				Get the name of the editor plugin. For main scren plugins this is what will appear in the selector (which by default is 2D, 3D, Script).
 			</description>
 		</method>
+		<method name="get_resource_previewer">
+			<return type="EditorResourcePreview">
+			</return>
+			<description>
+			Get tool for generating resource previews.
+			</description>
+		</method>
 		<method name="get_selection">
 			<return type="EditorSelection">
 			</return>
@@ -11554,6 +11561,15 @@
 				Return true if this is a main screen editor plugin (it goes in the main screen selector together with 2D, 3D, Script).
 			</description>
 		</method>
+		<method name="inspect_object">
+			<argument index="0" name="object" type="Object">
+			</argument>
+			<argument index="1" name="for_property" type="String" default="&quot;&quot;">
+			</argument>
+			<description>
+			Inspect an object in the inspector.
+			</description>
+		</method>
 		<method name="make_visible" qualifiers="virtual">
 			<argument index="0" name="visible" type="bool">
 			</argument>
@@ -11657,6 +11673,117 @@
 		</constant>
 	</constants>
 </class>
+<class name="EditorResourcePreview" inherits="Node" category="Core">
+	<brief_description>
+		Helper to generate previews of reources or files.
+	</brief_description>
+	<description>
+		This object is used to generate previews for resources of files.
+	</description>
+	<methods>
+		<method name="add_preview_generator">
+			<argument index="0" name="generator" type="EditorResourcePreviewGenerator">
+			</argument>
+			<description>
+				Create an own, custom preview generator.
+			</description>
+		</method>
+		<method name="check_for_invalidation">
+			<argument index="0" name="path" type="String">
+			</argument>
+			<description>
+				Check if the resource changed, if so it will be invalidated and the corresponding signal emitted.
+			</description>
+		</method>
+		<method name="queue_edited_resource_preview">
+			<argument index="0" name="resource" type="Resource">
+			</argument>
+			<argument index="1" name="receiver" type="Object">
+			</argument>
+			<argument index="2" name="receiver_func" type="String">
+			</argument>
+			<argument index="3" name="userdata" type="Variant">
+			</argument>
+			<description>
+				Queue a resource being edited for preview (using an instance). Once the preview is ready, your receiver.receiver_func will be called either containing the preview texture or an empty texure (if no preview was possible). Callback must have the format: (path,texture,userdata). Userdata can be anything.
+			</description>
+		</method>
+		<method name="queue_resource_preview">
+			<argument index="0" name="path" type="String">
+			</argument>
+			<argument index="1" name="receiver" type="Object">
+			</argument>
+			<argument index="2" name="receiver_func" type="String">
+			</argument>
+			<argument index="3" name="userdata" type="Variant">
+			</argument>
+			<description>
+				Queue a resource file for preview (using a path). Once the preview is ready, your receiver.receiver_func will be called either containing the preview texture or an empty texure (if no preview was possible). Callback must have the format: (path,texture,userdata). Userdata can be anything.
+			</description>
+		</method>
+		<method name="remove_preview_generator">
+			<argument index="0" name="generator" type="EditorResourcePreviewGenerator">
+			</argument>
+			<description>
+				Remove a custom preview generator.
+			</description>
+		</method>
+	</methods>
+	<signals>
+		<signal name="preview_invalidated">
+			<argument index="0" name="path" type="String">
+			</argument>
+			<description>
+				If a preview was invalidated (changed) this signal will emit (using the path of the preview)
+			</description>
+		</signal>
+	</signals>
+	<constants>
+	</constants>
+</class>
+<class name="EditorResourcePreviewGenerator" inherits="Reference" category="Core">
+	<brief_description>
+		Custom generator of previews.
+	</brief_description>
+	<description>
+		Custom code to generate previews. Please check "file_dialog/thumbnail_size" in EditorSettings to find out the right size to do previews at.
+	</description>
+	<methods>
+		<method name="generate" qualifiers="virtual">
+			<return type="Texture">
+			</return>
+			<argument index="0" name="from" type="Resource">
+			</argument>
+			<description>
+				Generate a preview from a given resource. This must be always implemented.
+			Returning an empty texture is an OK way to fail and let another generator take care.
+			Care must be taken because this function is always called from a thread (not the main thread).
+			</description>
+		</method>
+		<method name="generate_from_path" qualifiers="virtual">
+			<return type="Texture">
+			</return>
+			<argument index="0" name="path" type="String">
+			</argument>
+			<description>
+				Generate a preview directly from a path, implementing this is optional, as default code will load and call generate()
+			Returning an empty texture is an OK way to fail and let another generator take care.
+			Care must be taken because this function is always called from a thread (not the main thread).
+			</description>
+		</method>
+		<method name="handles" qualifiers="virtual">
+			<return type="bool">
+			</return>
+			<argument index="0" name="type" type="String">
+			</argument>
+			<description>
+				Return if your generator supports this resource type.
+			</description>
+		</method>
+	</methods>
+	<constants>
+	</constants>
+</class>
 <class name="EditorScenePostImport" inherits="Reference" category="Core">
 	<brief_description>
 		Base script for post-processing scenes being imported.
@@ -13189,31 +13316,10 @@
 		However, by creating a [FuncRef] using the [method @GDScript.funcref] function, a reference to a function in a given object can be created, passed around and called.
 	</description>
 	<methods>
-		<method name="call_func">
+		<method name="call_func" qualifiers="vararg">
 			<return type="Variant">
 			</return>
-			<argument index="0" name="arg0" type="Variant" default="NULL">
-			</argument>
-			<argument index="1" name="arg1" type="Variant" default="NULL">
-			</argument>
-			<argument index="2" name="arg2" type="Variant" default="NULL">
-			</argument>
-			<argument index="3" name="arg3" type="Variant" default="NULL">
-			</argument>
-			<argument index="4" name="arg4" type="Variant" default="NULL">
-			</argument>
-			<argument index="5" name="arg5" type="Variant" default="NULL">
-			</argument>
-			<argument index="6" name="arg6" type="Variant" default="NULL">
-			</argument>
-			<argument index="7" name="arg7" type="Variant" default="NULL">
-			</argument>
-			<argument index="8" name="arg8" type="Variant" default="NULL">
-			</argument>
-			<argument index="9" name="arg9" type="Variant" default="NULL">
-			</argument>
 			<description>
-				Call the referenced function with the given arguments. The argument count must correspond to the required number of arguments in the function. Returns the return value of the function call.
 			</description>
 		</method>
 		<method name="set_function">
@@ -13290,7 +13396,7 @@
 			<description>
 			</description>
 		</method>
-		<method name="new">
+		<method name="new" qualifiers="vararg">
 			<return type="Object">
 			</return>
 			<description>
@@ -15392,10 +15498,11 @@
 			</argument>
 			<argument index="2" name="ssl_validate_domain" type="bool" default="true">
 			</argument>
+			<argument index="3" name="method" type="int" default="0">
+			</argument>
+			<argument index="4" name="request_data" type="String" default="&quot;&quot;">
+			</argument>
 			<description>
-				Make a HTTP GET request. The url is the complete url including "http://" or "https://" which will be parsed for a host and a port.
-				The custom_headers are HTTP request headers which will be used. If User-Agent is not specified a Godot specific will be used.
-				The ssl_validate_domain specifies if in case of HTTPS the server certificate should be verified.
 			</description>
 		</method>
 		<method name="set_body_size_limit">
@@ -17940,15 +18047,6 @@
 				Return tooltip hint for specified item index.
 			</description>
 		</method>
-		<method name="is_item_tooltip_enabled" qualifiers="const">
-			<return type="bool">
-			</return>
-			<argument index="0" name="idx" type="int">
-			</argument>
-			<description>
-				Returns whether the tooptip is enabled for specified item index.
-			</description>
-		</method>
 		<method name="get_max_columns" qualifiers="const">
 			<return type="int">
 			</return>
@@ -17977,7 +18075,7 @@
 			</description>
 		</method>
 		<method name="get_v_scroll">
-			<return type="VScrollBar">
+			<return type="Object">
 			</return>
 			<description>
 				Returns the current vertical scroll bar for the List.
@@ -18001,6 +18099,15 @@
 				Returns whether or not the item at the specified index is selectable.
 			</description>
 		</method>
+		<method name="is_item_tooltip_enabled" qualifiers="const">
+			<return type="bool">
+			</return>
+			<argument index="0" name="idx" type="int">
+			</argument>
+			<description>
+				Returns whether the tooptip is enabled for specified item index.
+			</description>
+		</method>
 		<method name="is_same_column_width" qualifiers="const">
 			<return type="int">
 			</return>
@@ -22540,7 +22647,7 @@
 				Replace a node in a scene by a given one. Subscriptions that pass through this node will be lost.
 			</description>
 		</method>
-		<method name="rpc">
+		<method name="rpc" qualifiers="vararg">
 			<argument index="0" name="method" type="String">
 			</argument>
 			<description>
@@ -22554,22 +22661,22 @@
 			<description>
 			</description>
 		</method>
-		<method name="rpc_id">
-			<argument index="0" name="peer_" type="int">
+		<method name="rpc_id" qualifiers="vararg">
+			<argument index="0" name="peer_id" type="int">
 			</argument>
 			<argument index="1" name="method" type="String">
 			</argument>
 			<description>
 			</description>
 		</method>
-		<method name="rpc_unreliable">
+		<method name="rpc_unreliable" qualifiers="vararg">
 			<argument index="0" name="method" type="String">
 			</argument>
 			<description>
 			</description>
 		</method>
-		<method name="rpc_unreliable_id">
-			<argument index="0" name="peer_" type="int">
+		<method name="rpc_unreliable_id" qualifiers="vararg">
+			<argument index="0" name="peer_id" type="int">
 			</argument>
 			<argument index="1" name="method" type="String">
 			</argument>
@@ -24021,50 +24128,18 @@
 				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 [@Global Scope] TYPE_*).
 			</description>
 		</method>
-		<method name="call">
+		<method name="call" qualifiers="vararg">
 			<return type="Variant">
 			</return>
 			<argument index="0" name="method" type="String">
 			</argument>
-			<argument index="1" name="arg0" type="Variant" default="NULL">
-			</argument>
-			<argument index="2" name="arg1" type="Variant" default="NULL">
-			</argument>
-			<argument index="3" name="arg2" type="Variant" default="NULL">
-			</argument>
-			<argument index="4" name="arg3" type="Variant" default="NULL">
-			</argument>
-			<argument index="5" name="arg4" type="Variant" default="NULL">
-			</argument>
-			<argument index="6" name="arg5" type="Variant" default="NULL">
-			</argument>
-			<argument index="7" name="arg6" type="Variant" default="NULL">
-			</argument>
-			<argument index="8" name="arg7" type="Variant" default="NULL">
-			</argument>
-			<argument index="9" name="arg8" type="Variant" default="NULL">
-			</argument>
-			<argument index="10" name="arg9" type="Variant" default="NULL">
-			</argument>
 			<description>
-				Call a function in the object, result is returned.
 			</description>
 		</method>
-		<method name="call_deferred">
+		<method name="call_deferred" qualifiers="vararg">
 			<argument index="0" name="method" type="String">
 			</argument>
-			<argument index="1" name="arg0" type="Variant" default="NULL">
-			</argument>
-			<argument index="2" name="arg1" type="Variant" default="NULL">
-			</argument>
-			<argument index="3" name="arg2" type="Variant" default="NULL">
-			</argument>
-			<argument index="4" name="arg3" type="Variant" default="NULL">
-			</argument>
-			<argument index="5" name="arg4" type="Variant" default="NULL">
-			</argument>
 			<description>
-				Create and store a function in the object. The call will take place on idle time.
 			</description>
 		</method>
 		<method name="callv">
@@ -24112,21 +24187,10 @@
 				Disconnect a signal from a method.
 			</description>
 		</method>
-		<method name="emit_signal">
+		<method name="emit_signal" qualifiers="vararg">
 			<argument index="0" name="signal" type="String">
 			</argument>
-			<argument index="1" name="arg0" type="Variant" default="NULL">
-			</argument>
-			<argument index="2" name="arg1" type="Variant" default="NULL">
-			</argument>
-			<argument index="3" name="arg2" type="Variant" default="NULL">
-			</argument>
-			<argument index="4" name="arg3" type="Variant" default="NULL">
-			</argument>
-			<argument index="5" name="arg4" type="Variant" default="NULL">
-			</argument>
 			<description>
-				Emit a signal. Arguments are passed in an array.
 			</description>
 		</method>
 		<method name="free">
@@ -32075,6 +32139,28 @@
 	<constants>
 	</constants>
 </class>
+<class name="RemoteTransform" inherits="Spatial" category="Core">
+	<brief_description>
+	</brief_description>
+	<description>
+	</description>
+	<methods>
+		<method name="get_remote_node" qualifiers="const">
+			<return type="NodePath">
+			</return>
+			<description>
+			</description>
+		</method>
+		<method name="set_remote_node">
+			<argument index="0" name="path" type="NodePath">
+			</argument>
+			<description>
+			</description>
+		</method>
+	</methods>
+	<constants>
+	</constants>
+</class>
 <class name="RemoteTransform2D" inherits="Node2D" category="Core">
 	<brief_description>
 	</brief_description>
@@ -34634,23 +34720,13 @@
 	<description>
 	</description>
 	<methods>
-		<method name="call_group">
+		<method name="call_group" qualifiers="vararg">
 			<argument index="0" name="flags" type="int">
 			</argument>
 			<argument index="1" name="group" type="String">
 			</argument>
 			<argument index="2" name="method" type="String">
 			</argument>
-			<argument index="3" name="arg0" type="Variant" default="NULL">
-			</argument>
-			<argument index="4" name="arg1" type="Variant" default="NULL">
-			</argument>
-			<argument index="5" name="arg2" type="Variant" default="NULL">
-			</argument>
-			<argument index="6" name="arg3" type="Variant" default="NULL">
-			</argument>
-			<argument index="7" name="arg4" type="Variant" default="NULL">
-			</argument>
 			<description>
 			</description>
 		</method>
@@ -43886,24 +43962,12 @@
 		Common behavior is to create an action, then add do/undo calls to functions or property changes, then commiting the action.
 	</description>
 	<methods>
-		<method name="add_do_method">
+		<method name="add_do_method" qualifiers="vararg">
 			<argument index="0" name="object" type="Object">
 			</argument>
 			<argument index="1" name="method" type="String">
 			</argument>
-			<argument index="2" name="arg0" type="Variant" default="NULL">
-			</argument>
-			<argument index="3" name="arg1" type="Variant" default="NULL">
-			</argument>
-			<argument index="4" name="arg2" type="Variant" default="NULL">
-			</argument>
-			<argument index="5" name="arg3" type="Variant" default="NULL">
-			</argument>
-			<argument index="6" name="arg4" type="Variant" default="NULL">
-			</argument>
 			<description>
-				Add a call to a method in a given object with custom
-			arguments.
 			</description>
 		</method>
 		<method name="add_do_property">
@@ -43924,23 +43988,12 @@
 				Add a 'do' reference that will be erased if the 'do' history is lost. This is useful mostly for new nodes created for the 'do' call. Do not use for resources.
 			</description>
 		</method>
-		<method name="add_undo_method">
+		<method name="add_undo_method" qualifiers="vararg">
 			<argument index="0" name="object" type="Object">
 			</argument>
 			<argument index="1" name="method" type="String">
 			</argument>
-			<argument index="2" name="arg0" type="Variant" default="NULL">
-			</argument>
-			<argument index="3" name="arg1" type="Variant" default="NULL">
-			</argument>
-			<argument index="4" name="arg2" type="Variant" default="NULL">
-			</argument>
-			<argument index="5" name="arg3" type="Variant" default="NULL">
-			</argument>
-			<argument index="6" name="arg4" type="Variant" default="NULL">
-			</argument>
 			<description>
-				Add a call to an undo method in a given object with custom arguments. Undo calls are used to revert 'do' calls.
 			</description>
 		</method>
 		<method name="add_undo_property">
diff --git a/tools/editor/editor_node.cpp b/tools/editor/editor_node.cpp
index 655652ced9..56170e1489 100644
--- a/tools/editor/editor_node.cpp
+++ b/tools/editor/editor_node.cpp
@@ -4139,6 +4139,8 @@ void EditorNode::register_editor_types() {
 	//ObjectTypeDB::register_type<EditorImportExport>();
 	ObjectTypeDB::register_type<EditorSettings>();
 	ObjectTypeDB::register_type<EditorSpatialGizmo>();
+	ObjectTypeDB::register_type<EditorResourcePreview>();
+	ObjectTypeDB::register_type<EditorResourcePreviewGenerator>();
 
 
 	//ObjectTypeDB::register_type<EditorImporter>();
diff --git a/tools/editor/editor_plugin.cpp b/tools/editor/editor_plugin.cpp
index fa5de096e0..752e961c87 100644
--- a/tools/editor/editor_plugin.cpp
+++ b/tools/editor/editor_plugin.cpp
@@ -32,6 +32,7 @@
 #include "plugins/spatial_editor_plugin.h"
 #include "tools/editor/editor_node.h"
 #include "tools/editor/editor_settings.h"
+#include "editor_resource_preview.h"
 
 void EditorPlugin::add_custom_type(const String& p_type, const String& p_base,const Ref<Script>& p_script, const Ref<Texture>& p_icon) {
 
@@ -272,6 +273,10 @@ EditorSettings *EditorPlugin::get_editor_settings() {
 	return EditorSettings::get_singleton();
 }
 
+EditorResourcePreview *EditorPlugin::get_resource_previewer() {
+	return EditorResourcePreview::get_singleton();
+}
+
 void EditorPlugin::add_import_plugin(const Ref<EditorImportPlugin>& p_editor_import) {
 
 	EditorNode::get_singleton()->add_editor_import_plugin(p_editor_import);
@@ -319,6 +324,8 @@ void EditorPlugin::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("add_export_plugin","plugin:EditorExportPlugin"),&EditorPlugin::add_export_plugin);
 	ObjectTypeDB::bind_method(_MD("remove_export_plugin","plugin:EditorExportPlugin"),&EditorPlugin::remove_export_plugin);
 
+	ObjectTypeDB::bind_method(_MD("get_resource_previewer:EditorResourcePreview"),&EditorPlugin::get_resource_previewer);
+
 	ObjectTypeDB::bind_method(_MD("inspect_object","object","for_property"),&EditorPlugin::inspect_object,DEFVAL(String()));
 
 	ObjectTypeDB::bind_method(_MD("get_base_control:Control"),&EditorPlugin::get_base_control);
diff --git a/tools/editor/editor_plugin.h b/tools/editor/editor_plugin.h
index 69aea402d5..ed949c74f6 100644
--- a/tools/editor/editor_plugin.h
+++ b/tools/editor/editor_plugin.h
@@ -34,6 +34,7 @@
 #include "scene/resources/texture.h"
 #include "undo_redo.h"
 #include "io/config_file.h"
+
 /**
 	@author Juan Linietsky <reduzio@gmail.com>
 */
@@ -47,6 +48,7 @@ class EditorSettings;
 class SpatialEditorGizmo;
 class EditorImportPlugin;
 class EditorExportPlugin;
+class EditorResourcePreview;
 
 class EditorPlugin : public Node {
 
@@ -134,6 +136,7 @@ public:
 	EditorSelection* get_selection();
 	//EditorImportExport *get_import_export();
 	EditorSettings *get_editor_settings();
+	EditorResourcePreview *get_resource_previewer();
 
 	virtual void restore_global_state();
 	virtual void save_global_state();
diff --git a/tools/editor/editor_resource_preview.cpp b/tools/editor/editor_resource_preview.cpp
index a02fe2a531..6afc3e2a34 100644
--- a/tools/editor/editor_resource_preview.cpp
+++ b/tools/editor/editor_resource_preview.cpp
@@ -35,14 +35,46 @@
 #include "editor_scale.h"
 #include "message_queue.h"
 
+bool EditorResourcePreviewGenerator::handles(const String& p_type) const {
+
+	if (get_script_instance() && get_script_instance()->has_method("handles")) {
+		return get_script_instance()->call("handles",p_type);
+	}
+	ERR_EXPLAIN("EditorResourcePreviewGenerator::handles needs to be overriden");
+	ERR_FAIL_V(false);
+}
+Ref<Texture> EditorResourcePreviewGenerator::generate(const RES& p_from){
+
+	if (get_script_instance() && get_script_instance()->has_method("generate")) {
+		return get_script_instance()->call("generate",p_from);
+	}
+	ERR_EXPLAIN("EditorResourcePreviewGenerator::generate needs to be overriden");
+	ERR_FAIL_V(Ref<Texture>());
+
+}
+
+
 Ref<Texture> EditorResourcePreviewGenerator::generate_from_path(const String& p_path) {
 
+	if (get_script_instance() && get_script_instance()->has_method("generate_from_path")) {
+		return get_script_instance()->call("generate_from_path",p_path);
+	}
+
 	RES res = ResourceLoader::load(p_path);
 	if (!res.is_valid())
 		return res;
 	return generate(res);
 }
 
+
+void EditorResourcePreviewGenerator::_bind_methods() {
+
+	ObjectTypeDB::add_virtual_method(get_type_static(),MethodInfo(Variant::BOOL,"handles",PropertyInfo(Variant::STRING,"type")));
+	ObjectTypeDB::add_virtual_method(get_type_static(),MethodInfo(Variant::OBJECT,"generate:Texture",PropertyInfo(Variant::OBJECT,"from",PROPERTY_HINT_RESOURCE_TYPE,"Resource")));
+	ObjectTypeDB::add_virtual_method(get_type_static(),MethodInfo(Variant::OBJECT,"generate_from_path:Texture",PropertyInfo(Variant::STRING,"path",PROPERTY_HINT_FILE)));
+
+}
+
 EditorResourcePreviewGenerator::EditorResourcePreviewGenerator() {
 
 
@@ -330,6 +362,11 @@ void EditorResourcePreview::add_preview_generator(const Ref<EditorResourcePrevie
 	preview_generators.push_back(p_generator);
 }
 
+void EditorResourcePreview::remove_preview_generator(const Ref<EditorResourcePreviewGenerator>& p_generator) {
+
+	preview_generators.erase(p_generator);
+}
+
 EditorResourcePreview* EditorResourcePreview::get_singleton() {
 
 	return singleton;
@@ -338,6 +375,11 @@ EditorResourcePreview* EditorResourcePreview::get_singleton() {
 void EditorResourcePreview::_bind_methods() {
 
 	ObjectTypeDB::bind_method("_preview_ready",&EditorResourcePreview::_preview_ready);
+
+	ObjectTypeDB::bind_method(_MD("queue_resource_preview","path","receiver","receiver_func","userdata:Variant"),&EditorResourcePreview::queue_resource_preview);
+	ObjectTypeDB::bind_method(_MD("queue_edited_resource_preview","resource:Resource","receiver","receiver_func","userdata:Variant"),&EditorResourcePreview::queue_edited_resource_preview);
+	ObjectTypeDB::bind_method(_MD("add_preview_generator","generator:EditorResourcePreviewGenerator"),&EditorResourcePreview::add_preview_generator);
+	ObjectTypeDB::bind_method(_MD("remove_preview_generator","generator:EditorResourcePreviewGenerator"),&EditorResourcePreview::remove_preview_generator);
 	ObjectTypeDB::bind_method(_MD("check_for_invalidation","path"),&EditorResourcePreview::check_for_invalidation);
 
 
diff --git a/tools/editor/editor_resource_preview.h b/tools/editor/editor_resource_preview.h
index 51a00965eb..2756360130 100644
--- a/tools/editor/editor_resource_preview.h
+++ b/tools/editor/editor_resource_preview.h
@@ -57,10 +57,13 @@ class EditorResourcePreviewGenerator : public Reference {
 
 	OBJ_TYPE(EditorResourcePreviewGenerator,Reference );
 
+protected:
+
+	static void _bind_methods();
 public:
 
-	virtual bool handles(const String& p_type) const=0;
-	virtual Ref<Texture> generate(const RES& p_from)=0;
+	virtual bool handles(const String& p_type) const;
+	virtual Ref<Texture> generate(const RES& p_from);
 	virtual Ref<Texture> generate_from_path(const String& p_path);
 
 	EditorResourcePreviewGenerator();
@@ -121,6 +124,7 @@ public:
 	void queue_edited_resource_preview(const Ref<Resource>& p_path, Object* p_receiver, const StringName& p_receiver_func, const Variant& p_userdata);
 
 	void add_preview_generator(const Ref<EditorResourcePreviewGenerator>& p_generator);
+	void remove_preview_generator(const Ref<EditorResourcePreviewGenerator>& p_generator);
 	void check_for_invalidation(const String& p_path);
 
 	EditorResourcePreview();