Add dynamically-created Event Handlers to the relevant handlers vector

If any kind of Pointer Handler is created dynamically in JS by
calling Component.createObject(), QObject::setParent() is called
rather than passing the parent to the constructor, so
QQuickItemPrivate::data_append() did not take care of adding the
handler to QQuickItemPrivate's extra->pointerHandlers vector.
We need to use the auto-parent mechanism (just as we did with
handling dynamic creation of nested Windows in
8cb02e23abbefc9d020707fc1a2d8b6eb4e103b6). Added
QQuickItemPrivate::addPointerHandler() to put the prepend()
and implied setAcceptedMouseButtons() in one place.

Fixes: QTBUG-71427
Change-Id: I3be3dd033c1c89e6e5b5c3463e1a720bbe963281
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/auto/quick/pointerhandlers/qquickpointerhandler/data/dynamicallyCreatedInWindow.qml b/tests/auto/quick/pointerhandlers/qquickpointerhandler/data/dynamicallyCreatedInWindow.qml
new file mode 100644
index 0000000000..058726b267
--- /dev/null
+++ b/tests/auto/quick/pointerhandlers/qquickpointerhandler/data/dynamicallyCreatedInWindow.qml
@@ -0,0 +1,20 @@
+import QtQuick 2.12
+import QtQuick.Window 2.12
+import Qt.test 1.0
+
+Window {
+    id: root
+    objectName: "root Window"
+    width: 320
+    height: 480
+
+    Component.onCompleted: handlerComponent.createObject(root)
+
+    Component {
+        id: handlerComponent
+
+        EventHandler {
+            objectName: "eventHandler"
+        }
+    }
+}