Added sell commodity feature.

commodity/data/commoditydata.cpp

@@ -8,7 +8,7 @@ CommodityData::CommodityData(QObject *parent)
     m_price = 0;
     m_vat = Enums::NONE;
 }
-int CommodityData::id() const
+int CommodityData::id()
 {
     return m_id;
 }
@@ -17,7 +17,7 @@ void CommodityData::setId(int id)
 {
     m_id = id;
 }
-QString CommodityData::name() const
+QString CommodityData::name()
 {
     return m_name;
 }
@@ -83,6 +83,21 @@ void CommodityData::setCount(int count)
     m_count = count;
 }
 
+QDecDouble CommodityData::unitPrice()
+{
+    return price();
+}
+
+Enums::VatType CommodityData::vatType()
+{
+    return vat();
+}
+
+QString CommodityData::pluginId()
+{
+    return "COMMODITY";
+}
+