made suggeted chnages to the presenter.py

mantidimaging/gui/windows/spectrum_viewer/presenter.py

@@ -220,19 +220,20 @@ def redraw_spectrum(self, name: str) -> None:
         """
         Redraw the spectrum with the given name
         """
-        for roi_name, roi in self.view.spectrum_widget.roi_dict.items():
-            roi = self.view.spectrum_widget.get_roi(roi_name)
-            self.view.set_spectrum(
-                name,
-                self.model.get_spectrum(roi,
-                                        self.spectrum_mode,
-                                        normalise_with_shuttercount=self.view.shuttercount_norm_enabled()))
+        roi = self.view.spectrum_widget.get_roi(name)
+        self.view.set_spectrum(
+            name,
+            self.model.get_spectrum(roi,
+                                    self.spectrum_mode,
+                                    normalise_with_shuttercount=self.view.shuttercount_norm_enabled()))
 
     def redraw_all_rois(self) -> None:
         """
         Redraw all ROIs and spectrum plots
         """
-        for roi_name in self.view.spectrum_widget.roi_dict:
+        for roi_name, roi_widget in self.view.spectrum_widget.roi_dict.items():
+            if not roi_widget.isVisible():
+                continue
             widget_roi = self.view.spectrum_widget.get_roi(roi_name)
             spectrum = self.model.get_spectrum(widget_roi, self.spectrum_mode, self.view.shuttercount_norm_enabled())
             self.view.set_spectrum(roi_name, spectrum)