QML ListView contentX is updated despite highlightFollowCurrentItem: false

[Oleg Synelnykov]

Hi,

I want to make ListView, which would ignore currentIndex/currentItem changes and would keep specified content position unchanged, no matter what.
I've used highlightFollowsCurrentItem: false for that (see example below). And when you increment current index (e.g. by pressing 'down') contentX remains unchanged, even if current item is no longer visible. But if you change contentX manually so it's not in the beginning (press 'space') and start decrementing current index - contentX will be updated once current item is no longer visible. Without animation (see Behavior on contentX below). Is that expected behavior? I couldn't find documentation which describes this behaviour.
I'm using Qt 5.9.4

import QtQuick 2.9
import QtQuick.Window 2.2

Window {
	visible: true
	width: 640
	height: 480
	title: qsTr("Hello World")

	ListView {
		id: listView
		focus: true
		anchors.fill: parent
		orientation: ListView.Vertical
		model: 20
		spacing: 10

		keyNavigationEnabled: true

		highlightFollowsCurrentItem: false

		delegate: Rectangle {
			height: 100
			width: listView.width
			color: ListView.isCurrentItem ? 'green' : 'orange'

			Behavior on color { ColorAnimation {} }

			Text {
				anchors.centerIn: parent
				text: index
			}
		}

		Behavior on contentX { NumberAnimation {} }

		Keys.onPressed: {
			if (event.key === Qt.Key_Space) {
				contentY = contentHeight - height;
				event.accepted = true;
				return;
			}
		}
	}
}