XML added attribute version for states

src/plugins/xml.lua

@@ -273,7 +273,18 @@ function BaseElement:fromXML(node, scope)
                 if child.children then
                     for _, stateChild in ipairs(child.children) do
                         local propName = stateChild.tag
-                        local value = convertValue(stateChild.value, scope)
+                        local value
+
+                        if stateChild.attributes and stateChild.attributes.value then
+                            value = convertValue(stateChild.attributes.value, scope)
+                        elseif stateChild.value then
+                            value = convertValue(stateChild.value, scope)
+                        else
+                            log.warn("XMLParser: State property '" .. propName .. "' has no value")
+                            value = nil
+                        end
+
+                        if value ~= nil then
                             local capitalizedName = propName:sub(1,1):upper() .. propName:sub(2)
                             local methodName = "set"..capitalizedName.."State"
 
@@ -284,6 +295,7 @@ function BaseElement:fromXML(node, scope)
                             end
                         end
                     end
+                end
             elseif(self._properties[child.tag])then
                 if(self._properties[child.tag].type == "table")then
                     self.set(child.tag, createTableFromNode(child, scope))