QTSVG renderer can resize and move the window to the screen center :-)

examples/demo.py

@@ -162,17 +162,17 @@ if False:
     demo_001.run_demo()
     demo_001 = None
 
-demo_000 = Demo(Scenario_Generator.load_scenario('./env-data/railway/example_network_000.pkl'))
-demo_000.run_demo()
-demo_000 = None
+    demo_000 = Demo(Scenario_Generator.load_scenario('./env-data/railway/example_network_000.pkl'))
+    demo_000.run_demo()
+    demo_000 = None
 
-demo_001 = Demo(Scenario_Generator.load_scenario('./env-data/railway/example_network_001.pkl'))
-demo_001.run_demo()
-demo_001 = None
+    demo_001 = Demo(Scenario_Generator.load_scenario('./env-data/railway/example_network_001.pkl'))
+    demo_001.run_demo()
+    demo_001 = None
 
-demo_002 = Demo(Scenario_Generator.load_scenario('./env-data/railway/example_network_002.pkl'))
-demo_002.run_demo()
-demo_002 = None
+    demo_002 = Demo(Scenario_Generator.load_scenario('./env-data/railway/example_network_002.pkl'))
+    demo_002.run_demo()
+    demo_002 = None
 
 
 demo_flatland_000 = Demo(Scenario_Generator.load_scenario('./env-data/railway/example_flatland_000.pkl'))

flatland/utils/render_qt.py

@@ -230,7 +230,7 @@ class QTSVG(GraphicsLayer):
         w = np.ceil(width * 0.8 / env.width)
         h = np.ceil(height * 0.8 / env.height)
         self.wWinMain.resize(env.width * w, env.height * h)
-
+        self.wWinMain.move((width - env.width * w) / 2, (height - env.height * h) / 2)
 
 def main2():
     gl = QTGL(10, 10)