[gui][magnification] Add setter and getter properties for magnification value

darfix/gui/magnificationWidget.py

@@ -101,6 +101,24 @@ class MagnificationWidget(qt.QMainWindow):
         else:
             self._okButton.setEnabled(True)
 
+    @property
+    def magnification(self):
+        return self._magnification
+
+    @magnification.setter
+    def magnification(self, magnification):
+        self._magnification = magnification
+        if self.magnification == Value.PIXEL_2X.value:
+            self._check2x(True)
+            self._checkbox2x.setChecked(True)
+        elif self.magnification == Value.PIXEL_10X.value:
+            self._checkbox10x.setChecked(True)
+            self._check10x(True)
+        else:
+            self._manualLE.setText(str(self._magnification))
+            self._checkManual(True)
+            self._checkboxManual.setChecked(True)
+
     def getDataset(self):
         return self.dataset, self.indices, self.bg_indices, self.bg_dataset