-virtual ~SelectionSystemWindowObserver() = default;
-virtual void setView( const View& view ) = 0;
-virtual void setRectangleDrawCallback( const RectangleCallback& callback ) = 0;
+ virtual ~SelectionSystemWindowObserver() = default;
+
+ virtual void setView(const View &view) = 0;
+
+ virtual void setRectangleDrawCallback(const RectangleCallback &callback) = 0;