#63 numeric spinbox element

graphics/element.lua

@@ -87,6 +87,11 @@ function element.new(args)
     function protected.on_update(...)
     end
 
+    -- get control value
+    function protected.get_value()
+        return nil
+    end
+
     ---@class graphics_element
     local public = {}
 
@@ -117,6 +122,11 @@ function element.new(args)
         protected.on_update(...)
     end
 
+    -- get the control value reading
+    function public.get_value()
+        return protected.get_value()
+    end
+
     -- show the element
     function public.show()
         protected.window.setVisible(true)