Allow to create a node at specific position

editor/plugins/canvas_item_editor_plugin.cpp

@@ -1012,6 +1012,32 @@ void CanvasItemEditor::_selection_menu_hide() {
 	selection_menu->set_size(Vector2(0, 0));
 }
 
+void CanvasItemEditor::_add_node_pressed(int p_result) {
+	if (p_result == AddNodeOption::ADD_NODE) {
+		editor->get_scene_tree_dock()->open_add_child_dialog();
+	} else if (p_result == AddNodeOption::ADD_INSTANCE) {
+		editor->get_scene_tree_dock()->open_instance_child_dialog();
+	}
+}
+
+void CanvasItemEditor::_node_created(Node *p_node) {
+	if (node_create_position == Point2()) {
+		return;
+	}
+
+	CanvasItem *c = Object::cast_to<CanvasItem>(p_node);
+	if (c) {
+		Transform2D xform = c->get_global_transform_with_canvas().affine_inverse() * c->get_transform();
+		c->_edit_set_position(xform.xform(node_create_position));
+	}
+
+	call_deferred("_reset_create_position"); // Defer the call in case more than one node is added.
+}
+
+void CanvasItemEditor::_reset_create_position() {
+	node_create_position = Point2();
+}
+
 bool CanvasItemEditor::_gui_input_rulers_and_guides(const Ref<InputEvent> &p_event) {
 	Ref<InputEventMouseButton> b = p_event;
 	Ref<InputEventMouseMotion> m = p_event;
@@ -2397,6 +2423,14 @@ bool CanvasItemEditor::_gui_input_select(const Ref<InputEvent> &p_event) {
 			}
 		}
 
+		if (b.is_valid() && b->is_pressed() && b->get_button_index() == BUTTON_RIGHT && b->get_control()) {
+			add_node_menu->set_position(get_global_transform().xform(get_local_mouse_position()));
+			add_node_menu->set_size(Vector2(1, 1));
+			add_node_menu->popup();
+			node_create_position = transform.affine_inverse().xform((get_local_mouse_position()));
+			return true;
+		}
+
 		if (b.is_valid() && b->get_button_index() == BUTTON_LEFT && b->is_pressed() && tool == TOOL_SELECT) {
 			// Single item selection
 			Point2 click = transform.affine_inverse().xform(b->get_position());
@@ -5257,6 +5291,9 @@ void CanvasItemEditor::_bind_methods() {
 	ClassDB::bind_method("_tree_changed", &CanvasItemEditor::_tree_changed);
 	ClassDB::bind_method("_selection_changed", &CanvasItemEditor::_selection_changed);
 	ClassDB::bind_method("_popup_warning_depop", &CanvasItemEditor::_popup_warning_depop);
+	ClassDB::bind_method("_add_node_pressed", &CanvasItemEditor::_add_node_pressed);
+	ClassDB::bind_method("_node_created", &CanvasItemEditor::_node_created);
+	ClassDB::bind_method("_reset_create_position", &CanvasItemEditor::_reset_create_position);
 	ClassDB::bind_method(D_METHOD("_selection_result_pressed"), &CanvasItemEditor::_selection_result_pressed);
 	ClassDB::bind_method(D_METHOD("_selection_menu_hide"), &CanvasItemEditor::_selection_menu_hide);
 	ClassDB::bind_method(D_METHOD("get_state"), &CanvasItemEditor::get_state);
@@ -5574,6 +5611,9 @@ CanvasItemEditor::CanvasItemEditor(EditorNode *p_editor) {
 	editor_selection->connect("selection_changed", this, "update");
 	editor_selection->connect("selection_changed", this, "_selection_changed");
 
+	editor->get_scene_tree_dock()->connect("node_created", this, "_node_created");
+	editor->get_scene_tree_dock()->connect("add_node_used", this, "_reset_create_position");
+
 	editor->call_deferred("connect", "play_pressed", this, "_update_override_camera_button", make_binds(true));
 	editor->call_deferred("connect", "stop_pressed", this, "_update_override_camera_button", make_binds(false));
 
@@ -5950,6 +5990,12 @@ CanvasItemEditor::CanvasItemEditor(EditorNode *p_editor) {
 	selection_menu->connect("id_pressed", this, "_selection_result_pressed");
 	selection_menu->connect("popup_hide", this, "_selection_menu_hide");
 
+	add_node_menu = memnew(PopupMenu);
+	add_child(add_node_menu);
+	add_node_menu->add_icon_item(editor->get_scene_tree_dock()->get_icon("Add", "EditorIcons"), TTR("Add Node Here"));
+	add_node_menu->add_icon_item(editor->get_scene_tree_dock()->get_icon("Instance", "EditorIcons"), TTR("Instance Scene Here"));
+	add_node_menu->connect("id_pressed", this, "_add_node_pressed");
+
 	multiply_grid_step_shortcut = ED_SHORTCUT("canvas_item_editor/multiply_grid_step", TTR("Multiply grid step by 2"), KEY_KP_MULTIPLY);
 	divide_grid_step_shortcut = ED_SHORTCUT("canvas_item_editor/divide_grid_step", TTR("Divide grid step by 2"), KEY_KP_DIVIDE);
 	pan_view_shortcut = ED_SHORTCUT("canvas_item_editor/pan_view", TTR("Pan View"), KEY_SPACE);

editor/plugins/canvas_item_editor_plugin.h

@@ -82,6 +82,11 @@ public:
 		TOOL_MAX
 	};
 
+	enum AddNodeOption {
+		ADD_NODE,
+		ADD_INSTANCE,
+	};
+
 private:
 	EditorNode *editor;
 
@@ -283,6 +288,7 @@ private:
 
 	bool ruler_tool_active;
 	Point2 ruler_tool_origin;
+	Point2 node_create_position;
 
 	MenuOption last_option;
 
@@ -379,6 +385,7 @@ private:
 	Button *key_auto_insert_button;
 
 	PopupMenu *selection_menu;
+	PopupMenu *add_node_menu;
 
 	Control *top_ruler;
 	Control *left_ruler;
@@ -439,6 +446,9 @@ private:
 	void _snap_changed();
 	void _selection_result_pressed(int);
 	void _selection_menu_hide();
+	void _add_node_pressed(int p_result);
+	void _node_created(Node *p_node);
+	void _reset_create_position();
 
 	UndoRedo *undo_redo;
 	bool _build_bones_list(Node *p_node);

editor/scene_tree_dock.cpp

@@ -225,6 +225,9 @@ void SceneTreeDock::_perform_instance_scenes(const Vector<String> &p_files, Node
 
 	editor_data->get_undo_redo().commit_action();
 	editor->push_item(instances[instances.size() - 1]);
+	for (int i = 0; i < instances.size(); i++) {
+		emit_signal("node_created", instances[i]);
+	}
 }
 
 void SceneTreeDock::_replace_with_branch_scene(const String &p_file, Node *base) {
@@ -353,6 +356,11 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 				break;
 			}
 
+			if (reset_create_dialog && !p_confirm_override) {
+				create_dialog->set_base_type("Node");
+				reset_create_dialog = false;
+			}
+
 			// Prefer nodes that inherit from the current scene root.
 			Node *current_edited_scene_root = EditorNode::get_singleton()->get_edited_scene();
 			if (current_edited_scene_root) {
@@ -373,6 +381,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			}
 
 			create_dialog->popup_create(true);
+			if (!p_confirm_override) {
+				emit_signal("add_node_used");
+			}
 		} break;
 		case TOOL_INSTANCE: {
 			if (!profile_allow_editing) {
@@ -387,7 +398,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 
 			quick_open->popup_dialog("PackedScene", true);
 			quick_open->set_title(TTR("Instance Child Scene"));
-
+			if (!p_confirm_override) {
+				emit_signal("add_node_used");
+			}
 		} break;
 		case TOOL_EXPAND_COLLAPSE: {
 			if (!scene_tree->get_selected()) {
@@ -2168,6 +2181,8 @@ void SceneTreeDock::_do_create(Node *p_parent) {
 		}
 		ct->set_size(ms);
 	}
+
+	emit_signal("node_created", c);
 }
 
 void SceneTreeDock::_create() {
@@ -2860,6 +2875,16 @@ void SceneTreeDock::open_script_dialog(Node *p_for_node, bool p_extend) {
 	}
 }
 
+void SceneTreeDock::open_add_child_dialog() {
+	create_dialog->set_base_type("CanvasItem");
+	_tool_selected(TOOL_NEW, true);
+	reset_create_dialog = true;
+}
+
+void SceneTreeDock::open_instance_child_dialog() {
+	_tool_selected(TOOL_INSTANCE, true);
+}
+
 void SceneTreeDock::add_remote_tree_editor(Control *p_remote) {
 	ERR_FAIL_COND(remote_tree != nullptr);
 	add_child(p_remote);
@@ -3099,6 +3124,8 @@ void SceneTreeDock::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("replace_node"), &SceneTreeDock::replace_node);
 
 	ADD_SIGNAL(MethodInfo("remote_tree_selected"));
+	ADD_SIGNAL(MethodInfo("add_node_used"));
+	ADD_SIGNAL(MethodInfo("node_created", PropertyInfo(Variant::OBJECT, "node", PROPERTY_HINT_RESOURCE_TYPE, "Node")));
 }
 
 SceneTreeDock::SceneTreeDock(EditorNode *p_editor, Node *p_scene_root, EditorSelection *p_editor_selection, EditorData &p_editor_data) {

editor/scene_tree_dock.h

@@ -104,6 +104,7 @@ class SceneTreeDock : public VBoxContainer {
 	Vector<ObjectID> subresources;
 
 	bool restore_script_editor_on_drag;
+	bool reset_create_dialog = false;
 
 	int current_option;
 	CreateDialog *create_dialog;
@@ -282,6 +283,9 @@ public:
 	void attach_script_to_selected(bool p_extend);
 	void open_script_dialog(Node *p_for_node, bool p_extend);
 
+	void open_add_child_dialog();
+	void open_instance_child_dialog();
+
 	ScriptCreateDialog *get_script_create_dialog() { return script_create_dialog; }
 
 	SceneTreeDock(EditorNode *p_editor, Node *p_scene_root, EditorSelection *p_editor_selection, EditorData &p_editor_data);

scene/gui/control.cpp

@@ -97,7 +97,7 @@ void Control::_edit_set_state(const Dictionary &p_state) {
 void Control::_edit_set_position(const Point2 &p_position) {
 #ifdef TOOLS_ENABLED
 	ERR_FAIL_COND_MSG(!Engine::get_singleton()->is_editor_hint(), "This function can only be used from editor plugins.");
-	set_position(p_position, CanvasItemEditor::get_singleton()->is_anchors_mode_enabled());
+	set_position(p_position, CanvasItemEditor::get_singleton()->is_anchors_mode_enabled() && Object::cast_to<Control>(data.parent));
 #else
 	// Unlikely to happen. TODO: enclose all _edit_ functions into TOOLS_ENABLED
 	set_position(p_position);