qtbug1.qml

import QtQuick 6.2

Window {
    id: root
    visible: true
    width: 800
    height: 600
    title: qsTr("Qt 6.2.1 ListView Bug")

    Component {
        id: listViewHeader
        Rectangle {
            z: 2
            color: "black"
            clip: true
            height: columnName.implicitHeight + 10
            width: myListView.width
            Text {
                id: columnName
                color: "white"
                text: qsTr("Row Name")
            }
        }
    }

    Component {
        id: listDelegate
        Rectangle {
            color: Qt.rgba(Math.random(), Math.random(), Math.random(), 0.25)
            clip: true
            height: rowText.implicitHeight + 10
            width: myListView.width
            Text {
                id: rowText
                text: model.display
            }
        }
    }

    ListView {
        id: myListView
        anchors.fill: parent

        // BUG!  If the ListView has a header and the view is not moved so that item 0
        // is still shown when the model is reset, then the ListView renders a phantom
        // item 0 that is no longer in the model.  If new model has an item 0 it is
        // rendered right over the top of the phantom item 0.
        header: listViewHeader
        headerPositioning: ListView.OverlayHeader

        model: pythonModel
        delegate: listDelegate
        clip: true
        focus: true
    }

    Connections {
        target: pythonModel
        function onModelAboutToBeReset() {
            console.log("onModelAboutToBeReset model.rowCount=", pythonModel.rowCount())
        }
    }

    Connections {
        target: pythonModel
        function onModelReset() {
            console.log("onModelReset model.rowCount=", pythonModel.rowCount())
        }
    }
}