GUI use new Det2D API

GUI/Model/Detector/DetectorItem.cpp

@@ -59,12 +59,16 @@ std::unique_ptr<IDetector> DetectorItem::createDetector() const
     const int n_x = m_phiAxis.nbins();
     const double x_min = Units::deg2rad(m_phiAxis.min());
     const double x_max = Units::deg2rad(m_phiAxis.max());
+    const double x_wid = x_max - x_min;
+    const double x_cen = (x_min + x_max) / 2;
 
     const int n_y = m_alphaAxis.nbins();
     const double y_min = Units::deg2rad(m_alphaAxis.min());
     const double y_max = Units::deg2rad(m_alphaAxis.max());
+    const double y_wid = y_max - y_min;
+    const double y_cen = (y_min + y_max) / 2;
 
-    auto result = std::make_unique<OldDetec2D>(n_x, x_min, x_max, n_y, y_min, y_max);
+    auto result = std::make_unique<Detector2D>(x_wid, y_wid, n_x, n_y, x_cen, y_cen);
 
     if (m_maskContainerItem) {
         const QVector<MaskItem*> maskItems = m_maskContainerItem->maskItems();