Fix undo for moving multiple visual shader nodes

editor/plugins/visual_shader_editor_plugin.cpp

@@ -1735,12 +1735,26 @@ VisualShaderNode *VisualShaderEditor::_add_node(int p_idx, int p_op_idx) {
 
 void VisualShaderEditor::_node_dragged(const Vector2 &p_from, const Vector2 &p_to, int p_node) {
 	VisualShader::Type type = get_current_shader_type();
+	drag_buffer.push_back({ type, p_node, p_from, p_to });
+	if (!drag_dirty) {
+		call_deferred("_nodes_dragged");
+	}
+	drag_dirty = true;
+}
+
+void VisualShaderEditor::_nodes_dragged() {
+	drag_dirty = false;
+
+	undo_redo->create_action(TTR("Node(s) Moved"));
+
+	for (List<DragOp>::Element *E = drag_buffer.front(); E; E = E->next()) {
+		undo_redo->add_do_method(visual_shader.ptr(), "set_node_position", E->get().type, E->get().node, E->get().to);
+		undo_redo->add_undo_method(visual_shader.ptr(), "set_node_position", E->get().type, E->get().node, E->get().from);
+		undo_redo->add_do_method(graph_plugin.ptr(), "set_node_position", E->get().type, E->get().node, E->get().to);
+		undo_redo->add_undo_method(graph_plugin.ptr(), "set_node_position", E->get().type, E->get().node, E->get().from);
+	}
 
-	undo_redo->create_action(TTR("Node Moved"));
-	undo_redo->add_do_method(visual_shader.ptr(), "set_node_position", type, p_node, p_to);
-	undo_redo->add_undo_method(visual_shader.ptr(), "set_node_position", type, p_node, p_from);
-	undo_redo->add_do_method(graph_plugin.ptr(), "set_node_position", type, p_node, p_to);
-	undo_redo->add_undo_method(graph_plugin.ptr(), "set_node_position", type, p_node, p_from);
+	drag_buffer.clear();
 	undo_redo->commit_action();
 }
 
@@ -2650,6 +2664,7 @@ void VisualShaderEditor::_bind_methods() {
 	ClassDB::bind_method("_clear_buffer", &VisualShaderEditor::_clear_buffer);
 	ClassDB::bind_method("_update_uniforms", &VisualShaderEditor::_update_uniforms);
 	ClassDB::bind_method("_set_mode", &VisualShaderEditor::_set_mode);
+	ClassDB::bind_method("_nodes_dragged", &VisualShaderEditor::_nodes_dragged);
 
 	ClassDB::bind_method(D_METHOD("get_drag_data_fw"), &VisualShaderEditor::get_drag_data_fw);
 	ClassDB::bind_method(D_METHOD("can_drop_data_fw"), &VisualShaderEditor::can_drop_data_fw);

editor/plugins/visual_shader_editor_plugin.h

@@ -261,7 +261,16 @@ class VisualShaderEditor : public VBoxContainer {
 
 	static VisualShaderEditor *singleton;
 
+	struct DragOp {
+		VisualShader::Type type;
+		int node;
+		Vector2 from;
+		Vector2 to;
+	};
+	List<DragOp> drag_buffer;
+	bool drag_dirty = false;
 	void _node_dragged(const Vector2 &p_from, const Vector2 &p_to, int p_node);
+	void _nodes_dragged();
 	bool updating;
 
 	void _connection_request(const String &p_from, int p_from_index, const String &p_to, int p_to_index);