QQuickWindow: Check if QQuickItem was not deleted

Added check into deliverMatchingPointsToItem method for Android device.

In QT_VERSION below 6.0.0 touchEnabled for QtQuickItems is set by default to true
It causes delivering touch events to Items which are not interested
In some cases it may cause a crash. For example using Material Style in Android.
QQuickShaderEffectSource may be deleted and then try to handle touch

Fixes: QTBUG-85379
Change-Id: Ia2c4e016db57ef9c86fcc31d4cfba6154068a546
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
(cherry picked from commit a14e4fcdf94d26774490b26a4ef77981594f583f)
Reviewed-by: Bartlomiej Moskal <bartlomiej.moskal@siili.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp
index d0c9ad5454..9ff91eb9a0 100644
--- a/src/quick/items/qquickwindow.cpp
+++ b/src/quick/items/qquickwindow.cpp
@@ -2864,6 +2864,14 @@ void QQuickWindowPrivate::deliverMatchingPointsToItem(QQuickItem *item, QQuickPo
 {
     Q_Q(QQuickWindow);
     QQuickItemPrivate *itemPrivate = QQuickItemPrivate::get(item);
+#if defined(Q_OS_ANDROID) && QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+    // QTBUG-85379
+    // In QT_VERSION below 6.0.0 touchEnabled for QtQuickItems is set by default to true
+    // It causes delivering touch events to Items which are not interested
+    // In some cases (like using Material Style in Android) it may cause a crash
+    if (itemPrivate->wasDeleted)
+        return;
+#endif
     pointerEvent->localize(item);
 
     // Let the Item's handlers (if any) have the event first.