added selection of the primary face in 1:1

GUI/src/main/java/cz/fidentis/analyst/project/ProjectPanel.java

@@ -344,8 +344,25 @@ public class ProjectPanel extends JPanel {
         if (project.getFaceByName(name2) == null) {
             project.addFace(face2);
         }
+        
+        Object[] options = {face1.getShortName(), face2.getShortName()};
+        
+        int choice = JOptionPane.showOptionDialog(this,
+                "Faces: ",
+                "Select primary face",
+                JOptionPane.DEFAULT_OPTION,
+                JOptionPane.QUESTION_MESSAGE,
+                null,
+                options,
+                options[0]);
 
-        createFaceToFaceTab(face1, face2, name1 + ":" + name2, false);
+        
+        if (choice == 0) {
+            createFaceToFaceTab(face1, face2, name1 + ":" + name2, false);
+        } else {
+            createFaceToFaceTab(face2, face1, name2 + ":" + name1, false);
+        }
+        
     }
     
     /**