-fixes and more fixes to new scene system, seems stable now..

BUT DONT TRUST ME IT MAY STILL BREAK, USE WITH CARE!!

scene/main/instance_placeholder.cpp

@@ -0,0 +1,74 @@
+#include "instance_placeholder.h"
+
+#include "scene/resources/packed_scene.h"
+#include "io/resource_loader.h"
+
+bool InstancePlaceholder::_set(const StringName& p_name, const Variant& p_value) {
+
+	PropSet ps;
+	ps.name=p_name;
+	ps.value=p_value;
+	stored_values.push_back(ps);
+	return true;
+}
+
+bool InstancePlaceholder::_get(const StringName& p_name,Variant &r_ret) const{
+
+	return false;
+}
+void InstancePlaceholder::_get_property_list( List<PropertyInfo> *p_list) const{
+
+
+}
+
+
+void InstancePlaceholder::set_path(const String& p_name) {
+
+	path=p_name;
+}
+
+String InstancePlaceholder::get_path() const {
+
+	return path;
+}
+void InstancePlaceholder::replace_by_instance(const Ref<PackedScene> &p_custom_scene){
+
+	ERR_FAIL_COND(!is_inside_tree());
+
+	Node *base = get_parent();
+	if (!base)
+		return;
+
+	Ref<PackedScene> ps;
+	if (p_custom_scene.is_valid())
+		ps = p_custom_scene;
+	else
+		ps = ResourceLoader::load(path,"PackedScene");
+
+	if (!ps.is_valid())
+		return;
+	Node *scene = ps->instance();
+	scene->set_name(get_name());
+	int pos = get_position_in_parent();
+
+	for(List<PropSet>::Element *E=stored_values.front();E;E=E->next()) {
+		scene->set(E->get().name,E->get().value);
+	}
+
+	queue_delete();
+
+	base->remove_child(this);
+	base->add_child(scene);
+	base->move_child(scene,pos);
+
+}
+
+void InstancePlaceholder::_bind_methods() {
+
+	ObjectTypeDB::bind_method(_MD("replace_by_instance","custom_scene:PackedScene"),&InstancePlaceholder::replace_by_instance,DEFVAL(Variant()));
+}
+
+InstancePlaceholder::InstancePlaceholder() {
+
+
+}

scene/main/instance_placeholder.h

@@ -0,0 +1,37 @@
+#ifndef INSTANCE_PLACEHOLDER_H
+#define INSTANCE_PLACEHOLDER_H
+
+#include "scene/main/node.h"
+
+class PackedScene;
+
+class InstancePlaceholder : public Node {
+
+	OBJ_TYPE(InstancePlaceholder,Node);
+
+	String path;
+	struct PropSet {
+		StringName name;
+		Variant value;
+	};
+
+	List<PropSet> stored_values;
+
+protected:
+	bool _set(const StringName& p_name, const Variant& p_value);
+	bool _get(const StringName& p_name,Variant &r_ret) const;
+	void _get_property_list( List<PropertyInfo> *p_list) const;
+
+	static void _bind_methods();
+
+public:
+
+	void set_path(const String& p_name);
+	String get_path() const;
+
+	void replace_by_instance(const Ref<PackedScene>& p_custom_scene=Ref<PackedScene>());
+
+	InstancePlaceholder();
+};
+
+#endif // INSTANCE_PLACEHOLDER_H

scene/main/node.cpp

@@ -1052,6 +1052,7 @@ void Node::get_owned_by(Node *p_by,List<Node*> *p_owned) {
 
 void Node::_set_owner_nocheck(Node* p_owner) {
 
+	ERR_FAIL_COND(data.owner);
 	data.owner=p_owner;
 	data.owner->data.owned.push_back( this );
 	data.OW = data.owner->data.owned.back();
@@ -1443,13 +1444,14 @@ Ref<SceneState> Node::get_scene_inherited_state() const{
 	return data.inherited_state;
 }
 
-Vector<StringName> Node::get_instance_groups() const {
+void Node::set_scene_instance_load_placeholder(bool p_enable) {
 
-	return data.instance_groups;
+	data.use_placeholder=p_enable;
 }
-Vector<Node::Connection> Node::get_instance_connections() const{
 
-	return data.instance_connections;
+bool Node::get_scene_instance_load_placeholder() const{
+
+	return data.use_placeholder;
 }
 
 int Node::get_position_in_parent() const {
@@ -2109,6 +2111,7 @@ Node::Node() {
 	data.parent_owned=false;
 	data.in_constructor=true;
 	data.viewport=NULL;
+	data.use_placeholder=false;
 }
 
 Node::~Node() {
@@ -2125,3 +2128,4 @@ Node::~Node() {
 }
 
 
+////////////////////////////////

scene/main/node.h

@@ -75,9 +75,6 @@ private:
 
 		HashMap<NodePath,int> editable_instances;
 
-		Vector<StringName> instance_groups;
-		Vector<Connection> instance_connections;
-
 		Node *parent;
 		Node *owner;
 		Vector<Node*> children;	// list of children
@@ -111,6 +108,8 @@ private:
 
 		bool parent_owned;
 		bool in_constructor;
+		bool use_placeholder;
+
 
 	} data;
 	
@@ -241,6 +240,7 @@ public:
 	void set_editable_instance(Node* p_node,bool p_editable);
 	bool is_editable_instance(Node* p_node) const;
 
+
 	/* NOTIFICATIONS */
 	
 	void propagate_notification(int p_notification);
@@ -278,8 +278,8 @@ public:
 	void set_scene_inherited_state(const Ref<SceneState>& p_state);
 	Ref<SceneState> get_scene_inherited_state() const;
 
-	Vector<StringName> get_instance_groups() const;
-	Vector<Connection> get_instance_connections() const;
+	void set_scene_instance_load_placeholder(bool p_enable);
+	bool get_scene_instance_load_placeholder() const;
 
 	static Vector<Variant> make_binds(VARIANT_ARG_LIST);
 
@@ -322,6 +322,4 @@ public:
 typedef Set<Node*,Node::Comparator> NodeSet;
 
 
-
-
 #endif

scene/register_scene_types.cpp

@@ -36,6 +36,7 @@
 #include "resources/default_theme/default_theme.h"
 #include "object_type_db.h"
 #include "scene/main/canvas_layer.h"
+#include "scene/main/instance_placeholder.h"
 #include "scene/main/viewport.h"
 #include "scene/gui/control.h"
 #include "scene/gui/texture_progress.h"
@@ -269,6 +270,7 @@ void register_scene_types() {
 	ObjectTypeDB::register_type<Object>();
 
 	ObjectTypeDB::register_type<Node>();
+	ObjectTypeDB::register_virtual_type<InstancePlaceholder>();
 
 	ObjectTypeDB::register_type<Viewport>();
 	ObjectTypeDB::register_virtual_type<RenderTargetTexture>();

scene/resources/packed_scene.cpp

@@ -32,6 +32,7 @@
 #include "scene/3d/spatial.h"
 #include "scene/gui/control.h"
 #include "scene/2d/node_2d.h"
+#include "scene/main/instance_placeholder.h"
 
 #define PACK_VERSION 2
 
@@ -100,6 +101,7 @@ Node *SceneState::instance(bool p_gen_edit_state) const {
 
 		if (i==0 && base_scene_idx>=0) {
 			//scene inheritance on root node
+			print_line("scene inherit");
 			Ref<PackedScene> sdata = props[ base_scene_idx ];
 			ERR_FAIL_COND_V( !sdata.is_valid(), NULL);
 			node = sdata->instance(p_gen_edit_state);
@@ -110,12 +112,32 @@ Node *SceneState::instance(bool p_gen_edit_state) const {
 
 		} else if (n.instance>=0) {
 			//instance a scene into this node
-			Ref<PackedScene> sdata = props[ n.instance ];
-			ERR_FAIL_COND_V( !sdata.is_valid(), NULL);
-			node = sdata->instance(p_gen_edit_state);
-			ERR_FAIL_COND_V(!node,NULL);
+			print_line("instance");
+			if (n.instance&FLAG_INSTANCE_IS_PLACEHOLDER) {
+
+				String path = props[n.instance&FLAG_MASK];
+				if (disable_placeholders) {
+
+					Ref<PackedScene> sdata = ResourceLoader::load(path,"PackedScene");
+					ERR_FAIL_COND_V( !sdata.is_valid(), NULL);
+					node = sdata->instance(p_gen_edit_state);
+					ERR_FAIL_COND_V(!node,NULL);
+				} else {
+					InstancePlaceholder *ip = memnew( InstancePlaceholder );
+					ip->set_path(path);
+					node=ip;
+				}
+				node->set_scene_instance_load_placeholder(true);
+			} else {
+				Ref<PackedScene> sdata = props[ n.instance&FLAG_MASK ];
+				ERR_FAIL_COND_V( !sdata.is_valid(), NULL);
+				node = sdata->instance(p_gen_edit_state);
+				ERR_FAIL_COND_V(!node,NULL);
+
+			}
 
 		} else if (n.type==TYPE_INSTANCED) {
+			//print_line("instanced");
 			//get the node from somewhere, it likely already exists from another instance
 			if (parent) {
 				node=parent->_get_child_by_name(snames[n.name]);
@@ -126,6 +148,7 @@ Node *SceneState::instance(bool p_gen_edit_state) const {
 #endif
 			}
 		} else if (ObjectTypeDB::is_type_enabled(snames[n.type])) {
+			print_line("created");
 			//node belongs to this scene and must be created
 			Object * obj = ObjectTypeDB::instance(snames[ n.type ]);
 			if (!obj || !obj->cast_to<Node>()) {
@@ -339,13 +362,20 @@ Error SceneState::_parse_node(Node *p_owner,Node *p_node,int p_parent_idx, Map<S
 				}
 
 				if (p_node->get_filename()!=String() && p_node->get_owner()==p_owner && instanced_by_owner) {
-					//must instance ourselves
-					Ref<PackedScene> instance = ResourceLoader::load(p_node->get_filename());
-					if (!instance.is_valid()) {
-						return ERR_CANT_OPEN;
-					}
 
-					nd.instance=_vm_get_variant(instance,variant_map);
+					if (p_node->get_scene_instance_load_placeholder()) {
+						//it's a placeholder, use the placeholder path
+						nd.instance=_vm_get_variant(p_node->get_filename(),variant_map);
+						nd.instance|=FLAG_INSTANCE_IS_PLACEHOLDER;
+					} else {
+						//must instance ourselves
+						Ref<PackedScene> instance = ResourceLoader::load(p_node->get_filename());
+						if (!instance.is_valid()) {
+							return ERR_CANT_OPEN;
+						}
+
+						nd.instance=_vm_get_variant(instance,variant_map);
+					}
 				}
 				n=NULL;
 			} else {
@@ -971,6 +1001,13 @@ bool SceneState::is_node_in_group(int p_node,const StringName& p_group) const {
 	return false;
 }
 
+bool SceneState::disable_placeholders=false;
+
+void SceneState::set_disable_placeholders(bool p_disable) {
+
+	disable_placeholders=p_disable;
+}
+
 bool SceneState::is_connection(int p_node,const StringName& p_signal,int p_to_node,const StringName& p_to_method) const {
 
 	ERR_FAIL_COND_V(p_node<0,false);

scene/resources/packed_scene.h

@@ -45,13 +45,9 @@ class SceneState : public Reference {
 
 	int base_scene_idx;
 
-	//missing - instances
-	//missing groups
-	//missing - owner
-	//missing - override names and values
-
 	enum {
 		FLAG_ID_IS_PATH=(1<<30),
+		FLAG_INSTANCE_IS_PLACEHOLDER=(1<<30),
 		FLAG_MASK=(1<<24)-1,
 		NO_PARENT_SAVED=0x7FFFFFFF,
 		TYPE_INSTANCED=0x7FFFFFFF,
@@ -105,8 +101,11 @@ class SceneState : public Reference {
 
 	_FORCE_INLINE_ Ref<SceneState> _get_base_scene_state() const;
 
+	static bool disable_placeholders;
 public:
 
+	static void set_disable_placeholders(bool p_disable);
+
 	int find_node_by_path(const NodePath& p_node) const;
 	Variant get_property_value(int p_node,const StringName& p_property,bool &found) const;
 	bool is_node_in_group(int p_node,const StringName& p_group) const;

tools/editor/editor_node.cpp

@@ -4417,6 +4417,7 @@ void EditorNode::_scene_tab_changed(int p_tab) {
 EditorNode::EditorNode() {
 
 	EditorHelp::generate_doc(); //before any editor classes are crated
+	SceneState::set_disable_placeholders(true);
 
 	InputDefault *id = Input::get_singleton()->cast_to<InputDefault>();
 

tools/editor/scene_tree_editor.cpp

@@ -67,6 +67,26 @@ void SceneTreeEditor::_subscene_option(int p_idx) {
 			//node->set_instance_children_editable(editable);
 			EditorNode::get_singleton()->get_edited_scene()->set_editable_instance(node,editable);
 			instance_menu->set_item_checked(0,editable);
+			if (editable) {
+				node->set_scene_instance_load_placeholder(false);
+				instance_menu->set_item_checked(1,false);
+			}
+
+			_update_tree();
+
+		} break;
+		case SCENE_MENU_USE_PLACEHOLDER: {
+
+			bool placeholder = node->get_scene_instance_load_placeholder();
+			placeholder = !placeholder;
+
+			//node->set_instance_children_editable(editable);
+			if (placeholder) {
+				EditorNode::get_singleton()->get_edited_scene()->set_editable_instance(node,false);
+			}
+			node->set_scene_instance_load_placeholder(placeholder);
+			instance_menu->set_item_checked(0,false);
+			instance_menu->set_item_checked(1,placeholder);
 
 			_update_tree();
 
@@ -127,6 +147,15 @@ void SceneTreeEditor::_cell_button_pressed(Object *p_item,int p_column,int p_id)
 			else
 				instance_menu->set_item_checked(0,false);
 
+			if (n->get_owner()==get_scene_node()) {
+				instance_menu->set_item_checked(1,n->get_scene_instance_load_placeholder());
+				instance_menu->set_item_disabled(1,false);
+			} else {
+
+				instance_menu->set_item_checked(1,false);
+				instance_menu->set_item_disabled(1,true);
+			}
+
 			instance_menu->popup();
 			instance_node=n->get_instance_ID();
 		}
@@ -520,7 +549,7 @@ void SceneTreeEditor::_notification(int p_what) {
 
 		get_tree()->connect("tree_changed",this,"_tree_changed");
 		get_tree()->connect("node_removed",this,"_node_removed");
-		instance_menu->set_item_icon(2,get_icon("Load","EditorIcons"));
+		instance_menu->set_item_icon(3,get_icon("Load","EditorIcons"));
 		tree->connect("item_collapsed",this,"_cell_collapsed");
 		inheritance_menu->set_item_icon(2,get_icon("Load","EditorIcons"));
 		clear_inherit_confirm->connect("confirmed",this,"_subscene_option",varray(SCENE_MENU_CLEAR_INHERITANCE_CONFIRM));
@@ -826,6 +855,7 @@ SceneTreeEditor::SceneTreeEditor(bool p_label,bool p_can_rename, bool p_can_open
 
 	instance_menu = memnew( PopupMenu );
 	instance_menu->add_check_item("Editable Children",SCENE_MENU_EDITABLE_CHILDREN);
+	instance_menu->add_check_item("Load As Placeholder",SCENE_MENU_USE_PLACEHOLDER);
 	instance_menu->add_separator();
 	instance_menu->add_item("Open in Editor",SCENE_MENU_OPEN);
 	instance_menu->connect("item_pressed",this,"_subscene_option");

tools/editor/scene_tree_editor.h

@@ -53,6 +53,7 @@ class SceneTreeEditor : public Control {
 
 	enum {
 		SCENE_MENU_EDITABLE_CHILDREN,
+		SCENE_MENU_USE_PLACEHOLDER,
 		SCENE_MENU_OPEN,
 		SCENE_MENU_CLEAR_INHERITANCE,
 		SCENE_MENU_OPEN_INHERITED,