Minor refactoring to reduce duplication

Re #23051

qt/scientific_interfaces/ISISReflectometry/GUI/Experiment/ExperimentPresenter.cpp

@@ -37,8 +37,7 @@ void ExperimentPresenter::notifySettingsChanged() {
 }
 
 void ExperimentPresenter::notifyRestoreDefaultsRequested() {
-  m_model = experimentDefaults(m_mainPresenter->instrument());
-  updateViewFromModel();
+  restoreDefaults();
   m_mainPresenter->notifySettingsChanged();
 }
 
@@ -112,7 +111,12 @@ void ExperimentPresenter::instrumentChanged(
     std::string const &instrumentName,
     Mantid::Geometry::Instrument_const_sptr instrument) {
   UNUSED_ARG(instrumentName);
-  m_model = experimentDefaults(instrument);
+  UNUSED_ARG(instrument);
+  restoreDefaults();
+}
+
+void ExperimentPresenter::restoreDefaults() {
+  m_model = experimentDefaults(m_mainPresenter->instrument());
   updateViewFromModel();
 }
 

qt/scientific_interfaces/ISISReflectometry/GUI/Experiment/ExperimentPresenter.h

@@ -68,6 +68,9 @@ public:
 
 private:
   IBatchPresenter *m_mainPresenter;
+
+  void restoreDefaults();
+
   ExperimentValidationResult validateExperimentFromView();
   PolarizationCorrections polarizationCorrectionsFromView();
   FloodCorrections floodCorrectionsFromView();

qt/scientific_interfaces/ISISReflectometry/GUI/Instrument/InstrumentPresenter.cpp

@@ -39,8 +39,7 @@ void InstrumentPresenter::notifySettingsChanged() {
 }
 
 void InstrumentPresenter::notifyRestoreDefaultsRequested() {
-  m_model = instrumentDefaults(m_mainPresenter->instrument());
-  updateViewFromModel();
+  restoreDefaults();
   m_mainPresenter->notifySettingsChanged();
 }
 
@@ -106,7 +105,12 @@ void InstrumentPresenter::instrumentChanged(
     std::string const &instrumentName,
     Mantid::Geometry::Instrument_const_sptr instrument) {
   UNUSED_ARG(instrumentName);
-  m_model = instrumentDefaults(instrument);
+  UNUSED_ARG(instrument);
+  restoreDefaults();
+}
+
+void InstrumentPresenter::restoreDefaults() {
+  m_model = instrumentDefaults(m_mainPresenter->instrument());
   updateViewFromModel();
 }
 

qt/scientific_interfaces/ISISReflectometry/GUI/Instrument/InstrumentPresenter.h

@@ -48,6 +48,7 @@ private:
   Instrument m_model;
   IBatchPresenter *m_mainPresenter;
 
+  void restoreDefaults();
   boost::optional<RangeInLambda> wavelengthRangeFromView();
   boost::optional<RangeInLambda> monitorBackgroundRangeFromView();
   boost::optional<RangeInLambda> monitorIntegralRangeFromView();