tmp listview2

import QtQuick 2.5
import QtQuick.Controls 2.5
import QtQuick.Layouts 1.0


Rectangle
{
id: root;
height: 500;
width: 200;

    ListView {
        id: myListView
        //Layout.preferredHeight: 100
        //Layout.fillWidth: true
        width: parent.width
        height: 100
        implicitWidth: contentWidth
        spacing: 10

        orientation: ListView.Horizontal


        snapMode: ListView.SnapToItem//SnapOneItem

        //layoutDirection: Qt.LeftToRight

        model: 4

        delegate: Rectangle {
            height: 50; width: 50
            color: "transparent"
            border.color: "blue"
        }
        //headerPositioning: ListView.InlineHeader  //
        headerPositioning: ListView.OverlayHeader


        // header: Item {
        //     Rectangle {
        //         anchors.leftMargin: 10
        //         anchors.left: parent.left
        //         height: 100; width: 100

        //         Rectangle {
        //             anchors.fill: parent
        //             color: 'blue'
        //             //source: "image://icons/add"
        //         }

        //         color: "transparent"
        //         border.color: "blue"
        //     }

        // }
        header: Rectangle {
            id: headerItem
            property bool test: (myListView.visibleArea.xPosition*myListView.width > 50/2) ? true:false
            width: 120//  myList.width
            height: 30
            //z: 2

            color: "blue"

            Text {
                text: test //+ myListView.visibleArea.xPosition*myListView.width
                color: "red"
            }
        }
    }
}