init limits for source distrubutions

GUI/Model/Beam/SourceItems.cpp

@@ -78,6 +78,11 @@ SourceItem::SourceItem()
         FootprintCatalog::Type::Gaussian);
 
     m_wavelength_item->resetToValue(0.1);
+    ASSERT(m_wavelength_item->distributionItem());
+    m_wavelength_item->distributionItem()->center().setLimits(RealLimits::nonnegative());
+
+    ASSERT(m_azimuthal_angle_item->distributionItem());
+    m_azimuthal_angle_item->distributionItem()->center().setLimits(RealLimits::limited(-90., 90.));
 }
 
 void SourceItem::writeTo(QXmlStreamWriter* w) const
@@ -164,6 +169,8 @@ BeamItem::BeamItem()
     : m_inclination_angle_item(std::make_unique<BeamDistributionItem>(Units::deg))
 {
     m_inclination_angle_item->resetToValue(0.2);
+    ASSERT(m_inclination_angle_item->distributionItem());
+    m_inclination_angle_item->distributionItem()->center().setLimits(RealLimits::limited(0., 90.));
 }
 
 void BeamItem::writeTo(QXmlStreamWriter* w) const

GUI/View/Device/DistributionSelector.cpp

@@ -36,6 +36,7 @@ DistributionSelector::DistributionSelector(std::optional<MeanConfig> mean_config
     m_distribution_combo = GUI::Util::createGeneralComboBoxFromPolyPtr(
         m_item->distributionSelection(),
         [this](int index) {
+            const RealLimits& old_limits = m_item->distributionItem()->center().limits();
             if (m_mean_config) {
                 double old_center = m_item->distributionItem()->center().dVal();
                 m_item->distributionSelection().setCertainIndex(index);
@@ -43,6 +44,8 @@ DistributionSelector::DistributionSelector(std::optional<MeanConfig> mean_config
             } else
                 m_item->distributionSelection().setCertainIndex(index);
 
+            m_item->distributionItem()->center().setLimits(old_limits);
+
             createDistributionWidgets();
             emit distributionChanged();
         },