axis link : type mismatch indication

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

@@ -552,6 +552,21 @@ public class EditorMenuBar extends MenuBar {
             selectButton.setOnAction(selEvent -> {
             	Nomad3DController selectedController = controllersList.getSelectionModel().getSelectedItem();
             	
+            	if (!((selectedAxis.getType() == Axis.Type.ROTATION 
+            				&& selectedController.getType() == Nomad3DController.Type.ROTATION) 
+            			|| (selectedAxis.getType() == Axis.Type.TRANSLATION 
+            				&& selectedController.getType() == Nomad3DController.Type.TRANSLATION))) {
+	        		Alert alert = new Alert(AlertType.CONFIRMATION);
+	        		alert.setTitle(linkAxisItem.getText());
+	        		alert.setContentText("The selected axis and controller do not have the same type.");
+	        		Optional<ButtonType> res = alert.showAndWait();
+	        		if (res.isPresent()) {
+	        			if (res.get() != ButtonType.OK) {
+	        				return;
+	        			}
+	        		}
+	            }
+            	
             	linkStage.close();
 
         		Alert alert = new Alert(AlertType.CONFIRMATION);