Simplify functions by using new getters/setters

GUI/coregui/Models/SessionItemUtils.cpp

@@ -49,20 +49,16 @@ int SessionItemUtils::ParentRow(const SessionItem& item)
 
 kvector_t SessionItemUtils::GetVectorItem(const SessionItem& item, const QString& name)
 {
-    SessionItem* vectorItem = item.getItem(name);
-    ASSERT(vectorItem);
-    double x = vectorItem->getItemValue(VectorItem::P_X).toDouble();
-    double y = vectorItem->getItemValue(VectorItem::P_Y).toDouble();
-    double z = vectorItem->getItemValue(VectorItem::P_Z).toDouble();
-    return {x, y, z};
+    auto& vectorItem = item.item<VectorItem>(name);
+    return {vectorItem.x(), vectorItem.y(), vectorItem.z()};
 }
 
 void SessionItemUtils::SetVectorItem(const SessionItem& item, const QString& name, kvector_t value)
 {
-    auto p_vector_item = item.getItem(name);
-    p_vector_item->setItemValue(VectorItem::P_X, value.x());
-    p_vector_item->setItemValue(VectorItem::P_Y, value.y());
-    p_vector_item->setItemValue(VectorItem::P_Z, value.z());
+    auto& vectorItem = item.item<VectorItem>(name);
+    vectorItem.setX(value.x());
+    vectorItem.setY(value.y());
+    vectorItem.setZ(value.z());
 }
 
 int SessionItemUtils::ParentVisibleRow(const SessionItem& item)