Fix rendering when closing and re-opening a window

Scene3D stops rendering if a window is closed and then opened
again. That happens because eventfilter was removed at
SurfaceAboutToBeDestroyed. There is no need to remove the
event filter, as a destroyed window will not receive any
events in any case.

Task-number: QTBUG-77263
Change-Id: I1bcf3c572da6c06c09d1d9590bd8481b1fed6953
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/src/render/backend/platformsurfacefilter.cpp b/src/render/backend/platformsurfacefilter.cpp
index 7458f607d..891e30c44 100644
--- a/src/render/backend/platformsurfacefilter.cpp
+++ b/src/render/backend/platformsurfacefilter.cpp
@@ -107,10 +107,6 @@ bool PlatformSurfaceFilter::eventFilter(QObject *obj, QEvent *e)
             // If we remove it, the call to isSurfaceValid will
             // implicitely return false
             PlatformSurfaceFilter::m_surfacesValidity.remove(m_surface);
-            if (m_obj) {
-                m_obj->removeEventFilter(this);
-                m_obj = nullptr;
-            }
             break;
         }