[gui][magnification] Add value class for magnification values

darfix/gui/magnificationWidget.py

@@ -26,10 +26,19 @@
 
 __authors__ = ["J. Garriga"]
 __license__ = "MIT"
-__date__ = "04/06/2021"
+__date__ = "16/07/2021"
 
 
 from silx.gui import qt
+from silx.utils.enum import Enum as _Enum
+
+
+class Value(_Enum):
+    """
+    Methods available to compute the background.
+    """
+    PIXEL_2X = 3.75
+    PIXEL_10X = 0.75
 
 
 class MagnificationWidget(qt.QMainWindow):
@@ -43,6 +52,8 @@ class MagnificationWidget(qt.QMainWindow):
 
         widget = qt.QWidget()
         layout = qt.QVBoxLayout()
+
+        self._magnification = Value.PIXEL_2X.value
         self._checkbox2x = qt.QCheckBox("2x magnification")
         self._checkbox10x = qt.QCheckBox("10x magnification")
         self._checkboxManual = qt.QCheckBox("Manual magnification:")
@@ -116,9 +127,9 @@ class MagnificationWidget(qt.QMainWindow):
     def _saveMagnification(self):
 
         if self._checkbox2x.isChecked():
-            d = 3.75
+            magnification = Value.PIXEL_2X.value
         elif self._checkbox10x.isChecked():
-            d = 0.75
+            magnification = Value.PIXEL_10X.value
         else:
             magnification = self._manualLE.text()
             if magnification == "":
@@ -127,7 +138,8 @@ class MagnificationWidget(qt.QMainWindow):
                 msg.setText("Magnification value has to be entered when choosing manual")
                 msg.exec_()
                 return
+        self._magnification = float(magnification)
 
-        self.dataset.compute_transformation(d)
+        self.dataset.compute_transformation(self.magnification)
 
         self.sigComputed.emit()