QML ComboBox Popup Issue

  • Hi All, I have used so many combo boxes recently but there is an issue in the popup of a particular ComboBox which I am not able to find the exact problem following is the code:

    import QtQuick 2.9
    import QtQuick.Window 2.2
    import QtQuick.Controls 2.2
    Window {
        visible: true
        width: 640
        height: 480
        title: qsTr("Hello World")
            width:parent.width * 0.30
            height:parent.height * 0.15
            model: ["12","23","78","23","45","70"]
            currentIndex: 0
            popup: Popup{
                y: comboNum.height - 1
                width: comboNum.width
                height: comboNum.height * 2
                padding: 1
                contentItem: ListView {
                    id: listview
                    implicitHeight: popup.height
                    clip: true
                    currentIndex: comboNum.highlightedIndex
                    interactive: true
                    highlightMoveDuration: 0
                    boundsBehavior: ListView.StopAtBounds
                    ScrollBar.vertical:ScrollBar {}

    The popup doesn't show all the elements and i am using QT 5.9.1.

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