Horizontal ScrollBar not scrolling content in ListView

[fcarney]

For the life of me I cannot make heads or tails of this:

import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.12

Window {
    id: window

    visible: true
    width: 640
    height: 480
    title: qsTr("ListView Horizontal ScrollBar DelegateChooser")

    ListModel {
        id: listmodel

        ListElement {type:"one"; datas:"123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"}
        ListElement {type:"two"; datas:"123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"}
    }

    ListView {
        width: parent.width/4
        height: parent.height

        clip: true
        spacing: 1

        delegate: Rectangle {
            width: window.width
            height: 20
            color: "darkred"
            border.color: "red"
            border.width: 1

            Text {
                text: datas
                color: "white"
            }
        }

        model: listmodel

        ScrollBar.horizontal: ScrollBar{}
    }
}

The delegate item is wider than the ListView itself. Shouldn't the scrollbar the delegate being shown?

[fcarney]

Add this to scroll:

ScrollBar.vertical: ScrollBar {}
    ScrollBar.horizontal: ScrollBar {
        id: horizscrollbar
    }

Also needs contentWidth to be set to largest contentItem. Found that to be tricky and didn't always work:

                   onCountChanged: {
                        var maxwidth = 0
                        for(var ind=0; ind<count; ++ind){
                            var item = itemAtIndex(ind)
                            if(item.width > maxwidth)
                                maxwidth = item.width
                        }
                        contentWidth = maxwidth

                        console.log(contentWidth)
                    }