From 1af556cb8d62a638f7fa0bcb6289bf932d338691 Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Tue, 23 Oct 2018 16:06:56 +1000
Subject: [PATCH] delay event filter installation

Qt 5.11 doesn't initialize the focusProxy until
a page has been loaded.
---
 aqt/webview.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/aqt/webview.py b/aqt/webview.py
index 21ea9360a..beb4a8ecd 100644
--- a/aqt/webview.py
+++ b/aqt/webview.py
@@ -97,6 +97,7 @@ class AnkiWebView(QWebEngineView):
         self._page.profile().setHttpCacheType(QWebEngineProfile.NoCache)
         self.resetHandlers()
         self.allowDrops = False
+        self._filterSet = False
         QShortcut(QKeySequence("Esc"), self,
                   context=Qt.WidgetWithChildrenShortcut, activated=self.onEsc)
         if isMac:
@@ -112,8 +113,6 @@ class AnkiWebView(QWebEngineView):
             QShortcut(QKeySequence("ctrl+shift+v"), self,
                       context=Qt.WidgetWithChildrenShortcut, activated=self.onPaste)
 
-        self.focusProxy().installEventFilter(self)
-
     def eventFilter(self, obj, evt):
         # disable pinch to zoom gesture
         if isinstance(evt, QNativeGestureEvent):
@@ -327,6 +326,10 @@ body {{ zoom: {}; {} }}
         return False
 
     def _onBridgeCmd(self, cmd):
+        if not self._filterSet:
+            self.focusProxy().installEventFilter(self)
+            self._filterSet = True
+
         if self._shouldIgnoreWebEvent():
             print("ignored late bridge cmd", cmd)
             return