Revert "delete autoclose function"

This reverts commit 4b20e26.

tests/test_result_gui_viewer.py

@@ -42,4 +42,14 @@ def test_result_gui_viewer():
     # Print summary of simulation result
     W.analyzer.print_simple_stats()
 
-    ResultGUIViewer.launch_World_viewer(W)
+    app, window = ResultGUIViewer.launch_World_viewer(W, return_app_window=True)
+
+    # Shut down 5 sec later
+    from PyQt5.QtCore import QTimer
+    import sys
+    timer = QTimer()
+    timer.timeout.connect(window.close)
+    timer.start(1000*5)
+    assert True
+    with pytest.raises(SystemExit):
+        sys.exit(app.exec_())

uxsim/ResultGUIViewer/ResultGUIViewer.py

@@ -369,7 +369,7 @@ def toggle_show_vehicles(self):
         self.show_vehicles = not self.show_vehicles
         self.graph_widget.set_show_vehicles(self.show_vehicles)
 
-def launch_World_viewer(W):
+def launch_World_viewer(W, return_app_window=False):
     """
     Launch the interactive viewer for the simulation result of the given World object.
 
@@ -419,6 +419,8 @@ def launch_World_viewer(W):
     app = QApplication(sys.argv)
     window = MainWindow(W, nodes, edges, vehicle_list, tmax)
     window.show()
+    if return_app_window:
+        return app, window
     sys.exit(app.exec_())