From 11930228fd6b8a2445f3ae4a9729568bfd2c2ab6 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Fri, 1 Jul 2016 18:39:26 +0800
Subject: [PATCH] dashboard: kill the Qt built-in main window closing mechanism

When the main window is closed, Qt makes QApplication.exec() return, which conflicts with Quamash's implementation of loop.run_until_complete(). The conflict causes Quamash's run_forever() to return earlier than it should, and cause "RuntimeError('Event loop stopped before Future completed.')".

Closes #475
---
 artiq/frontend/artiq_dashboard.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/artiq/frontend/artiq_dashboard.py b/artiq/frontend/artiq_dashboard.py
index 3c9dbf080..aabd1b6f5 100755
--- a/artiq/frontend/artiq_dashboard.py
+++ b/artiq/frontend/artiq_dashboard.py
@@ -59,7 +59,8 @@ class MainWindow(QtWidgets.QMainWindow):
 
         self.exit_request = asyncio.Event()
 
-    def closeEvent(self, *args):
+    def closeEvent(self, event):
+        event.ignore()
         self.exit_request.set()
 
     def save_state(self):