Fix flicker when changing ListView currentIndex with VisualItemModel.

Return the Referenced flag when the view has outstanding references
otherwise it will attempt to hide an item if believes shouldn't be
visible.

Task-number: QTBUG-25849
Change-Id: I7387ab8322a1cd7f3386685086b2b8ad10c8b4f0
Reviewed-by: Bea Lam <bea.lam@nokia.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/tests/auto/quick/qquicklistview/data/itemlist-flicker.qml b/tests/auto/quick/qquicklistview/data/itemlist-flicker.qml
new file mode 100644
index 0000000000..c0cc807bc0
--- /dev/null
+++ b/tests/auto/quick/qquicklistview/data/itemlist-flicker.qml
@@ -0,0 +1,46 @@
+// This example demonstrates placing items in a view using
+// a VisualItemModel
+
+import QtQuick 2.0
+
+Rectangle {
+    color: "lightgray"
+    width: 240
+    height: 320
+
+    VisualItemModel {
+        id: itemModel
+        objectName: "itemModel"
+        Rectangle {
+            objectName: "item1"
+            height: view.height / 3
+            width: view.width; color: "#FFFEF0"
+            Text { objectName: "text1"; text: "index: " + parent.VisualItemModel.index; font.bold: true; anchors.centerIn: parent }
+        }
+        Rectangle {
+            objectName: "item2"
+            height: view.height / 3
+            width: view.width; color: "#F0FFF7"
+            Text { objectName: "text2"; text: "index: " + parent.VisualItemModel.index; font.bold: true; anchors.centerIn: parent }
+        }
+        Rectangle {
+            objectName: "item3"
+            height: view.height / 3
+            width: view.width; color: "#F4F0FF"
+            Text { objectName: "text3"; text: "index: " + parent.VisualItemModel.index; font.bold: true; anchors.centerIn: parent }
+        }
+    }
+
+    ListView {
+        id: view
+        objectName: "view"
+        anchors.fill: parent
+        anchors.bottomMargin: 30
+        model: itemModel
+        preferredHighlightBegin: 0
+        preferredHighlightEnd: 0
+        highlightRangeMode: "StrictlyEnforceRange"
+        orientation: ListView.Vertical
+        flickDeceleration: 2000
+    }
+}