Sediment calibration: Skip crash compute button without data.

View/sediment_calibration_tab.py

@@ -1559,7 +1559,7 @@ class SedimentCalibrationTab(QWidget):
         # Variable 'stg.sand_sample_target_indice' is set only at
         # 'plot sample' button click
         if len(stg.sand_sample_target_indice) == 0:
-            self.interpolate_data_validity_message_box()
+            self._data_validity_message_box()
             return
 
         data_choice = self.combobox_acoustic_data_choice\
@@ -1642,7 +1642,7 @@ class SedimentCalibrationTab(QWidget):
 
         self.plot_profile_of_concentration_fine()
 
-    def interpolate_data_validity_message_box(self):
+    def _data_validity_message_box(self):
         msgBox = QMessageBox()
         msgBox.setWindowTitle("Interpolate (step 2)")
         msgBox.setIconPixmap(
@@ -1911,6 +1911,9 @@ class SedimentCalibrationTab(QWidget):
                                     axis=1))
 
     def function_pushbutton_compute_calibration(self):
+        if len(stg.sand_sample_target_indice) == 0:
+            self._data_validity_message_box()
+            return
 
         self.label_temperature.clear()
         self.label_temperature.setText("T = " + str(stg.temperature) + " °C")