Do not show reference axes widgets depending on the type

src/main/java/fr/ill/ics/n3d/gui/EditorMenuBar.java

@@ -384,6 +384,7 @@ public class EditorMenuBar extends MenuBar {
 			ComboBox<String> zeroValueReference1Box = new ComboBox<>(references);
 			zeroValueReference1Label.setVisible(selectedAxis.getType() == Axis.Type.ROTATION || selectedAxis.getType() == Axis.Type.TRANSLATION);
 			zeroValueReference1Box.setVisible(selectedAxis.getType() == Axis.Type.ROTATION || selectedAxis.getType() == Axis.Type.TRANSLATION);
+			reversedDirection1Check.setVisible(selectedAxis.getType() == Axis.Type.ROTATION);
 			
 			// Select the reference axis.
 			if (selectedAxis.getZeroValueReferenceAxis1() != null) {
@@ -513,6 +514,7 @@ public class EditorMenuBar extends MenuBar {
 					// Change the visibility of the zero value reference boxes and labels.
 					zeroValueReference1Label.setVisible(newValue == Axis.Type.ROTATION || newValue == Axis.Type.TRANSLATION);
 					zeroValueReference1Box.setVisible(newValue == Axis.Type.ROTATION || newValue == Axis.Type.TRANSLATION);
+					reversedDirection1Check.setVisible(newValue == Axis.Type.ROTATION);
 					
 					zeroValueReference2Label.setVisible(newValue == Axis.Type.ROTATION);
 					zeroValueReference2Box.setVisible(newValue == Axis.Type.ROTATION);
@@ -545,26 +547,42 @@ public class EditorMenuBar extends MenuBar {
 			controllerBox.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<String>() {
 				@Override
 				public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
-					// Select the controller.
-					selectedAxis.setController(NomadLinker.getInstance().getControllerByName(newValue));
-
-					// Set the text of the min and max labels.
-					minValueLabel.setText("Min Value : " + selectedAxis.getController().getMinPosition());
-					maxValueLabel.setText("Max Value : " + selectedAxis.getController().getMaxPosition());
 					
-					// Set the type of axis based on the type of the controller.
-					Nomad3DController.Type type = selectedAxis.getController().getType();
+					if (!newValue.equals("")) {
 					
-					if (type == Nomad3DController.Type.ROTATION) {
-						selectedAxis.setType(Axis.Type.ROTATION);
-					}
-					else if (type == Nomad3DController.Type.TRANSLATION) {
-						selectedAxis.setType(Axis.Type.TRANSLATION);
+						// Select the controller.
+						selectedAxis.setController(NomadLinker.getInstance().getControllerByName(newValue));
+	
+						// Set the text of the min and max labels.
+						minValueLabel.setText("Min Value : " + selectedAxis.getController().getMinPosition());
+						maxValueLabel.setText("Max Value : " + selectedAxis.getController().getMaxPosition());
+						
+						// Set the type of axis based on the type of the controller.
+						Nomad3DController.Type type = selectedAxis.getController().getType();
+						
+						if (type == Nomad3DController.Type.ROTATION) {
+							selectedAxis.setType(Axis.Type.ROTATION);
+						}
+						else if (type == Nomad3DController.Type.TRANSLATION) {
+							selectedAxis.setType(Axis.Type.TRANSLATION);
+						}
+						else {
+							selectedAxis.setType(Axis.Type.FIXED);
+						}
+						typeBox.getSelectionModel().select(selectedAxis.getType());
 					}
 					else {
-						selectedAxis.setType(Axis.Type.FIXED);
+						// Reset the controller.
+						selectedAxis.setController(null);
+	
+						// Set the text of the min and max labels.
+						minValueLabel.setText("");
+						maxValueLabel.setText("");
+						
+						// Reset the type of axis.
+						selectedAxis.setType(Axis.Type.NONE);
+						typeBox.getSelectionModel().select(selectedAxis.getType());
 					}
-					typeBox.getSelectionModel().select(selectedAxis.getType());
 				}
 			});