Fix ListView::positionViewAtIndex with ListView.Contain mode

Sticky headers and footers weren't accounted for when calculating new
view position causing the requested item to be left behind them.

Task-number: QTBUG-63974
Change-Id: Id69579643a942e8558960b2c8b0fee980fa86947
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/auto/quick/qquicklistview/data/qtbug63974.qml b/tests/auto/quick/qquicklistview/data/qtbug63974.qml
new file mode 100644
index 0000000000..1e0afa54f8
--- /dev/null
+++ b/tests/auto/quick/qquicklistview/data/qtbug63974.qml
@@ -0,0 +1,34 @@
+import QtQuick 2.6
+
+ListView {
+    id: table
+    height: 200
+    width: 100
+
+    headerPositioning: ListView.OverlayHeader
+    header: Rectangle {
+        width: table.width
+        height: 20
+        color: "red"
+        z: 100
+    }
+
+    footerPositioning: ListView.OverlayFooter
+    footer: Rectangle {
+        width: table.width
+        height: 20
+        color: "blue"
+        z: 200
+    }
+
+    model: 30
+    delegate: Rectangle {
+        height: 20
+        width: table.width
+        color: "lightgray"
+        Text {
+            text: "Item " + index
+            anchors.centerIn: parent
+        }
+    }
+}