Start adding grid

src/visual_elements/TextNode.h

@@ -20,6 +20,9 @@ public:
     std::string getContent() const;
     std::string getFontLabel() const;
 
+    SceneItem* getSceneItem(std::size_t idx) const override;
+    unsigned getNumSceneItems() const override;
+
     unsigned getWidth() const;
     unsigned getHeight() const;
 
@@ -39,6 +42,8 @@ private:
 
     unsigned mWidth{1};
     unsigned mHeight{1};
+
+    std::unique_ptr<SceneItem> mTextItem;
 };
 
 using TextNodetr = std::unique_ptr<TextNode>;