fix reference to widget as instance attribute not through a method

Author: luipir

python/plugins/processing/algs/qgis/ui/RasterCalculatorWidgets.py

@@ -224,23 +224,23 @@ def refresh(self):
         for lyr in layers:
             for n in range(lyr.bandCount()):
                 options[lyr.name()] = '{:s}@{:d}'.format(lyr.name(), n + 1)
-        self.widget().setList(options)
+        self.widget.setList(options)
 
     def setValue(self, value):
         if self.dialogType == DIALOG_STANDARD:
             pass  # TODO
         elif self.dialogType == DIALOG_BATCH:
-            return self.widget().setText(value)
+            return self.widget.setText(value)
         else:
-            self.widget().setValue(value)
+            self.widget.setValue(value)
 
     def value(self):
         if self.dialogType in DIALOG_STANDARD:
-            return self.widget().value()
+            return self.widget.value()
         elif self.dialogType == DIALOG_BATCH:
-            return self.widget().text()
+            return self.widget.text()
         else:
-            return self.widget().value()
+            return self.widget.value()
 
 
 class LayersListWidgetWrapper(WidgetWrapper):
@@ -273,7 +273,7 @@ def value(self):
             return self.widget.getText()
         else:
             options = self._getOptions()
-            values = [options[i] for i in self.widget().selectedoptions]
+            values = [options[i] for i in self.widget.selectedoptions]
             if len(values) == 0 and not self.parameterDefinition().flags() & QgsProcessingParameterDefinition.FlagOptional:
                 raise InvalidParameterValue()
             return values