start class LineItem

GUI/Model/Mask/MaskItems.h

@@ -128,7 +128,11 @@ private:
     OwningVector<PolygonPointItem> m_points;
 };
 
-class VerticalLineItem : public MaskItem {
+class LineItem : public MaskItem {
+public:
+};
+
+class VerticalLineItem : public LineItem {
 public:
     VerticalLineItem();
     std::unique_ptr<IShape2D> createShape() const override;
@@ -144,7 +148,7 @@ private:
     DoubleProperty m_posX;
 };
 
-class HorizontalLineItem : public MaskItem {
+class HorizontalLineItem : public LineItem {
 public:
     HorizontalLineItem();
     std::unique_ptr<IShape2D> createShape() const override;