隐藏时如何阻止项影响父项的大小？

Question

当rightDeltaText项被隐藏时，它似乎仍在影响其父项的高度。

如何使它不影响其父代的身高？

Rectangle {
    id: rightSelectionRect
    anchors.top: parent.top
    anchors.left: rightLine.right
    implicitWidth: leftSelectionLayout.implicitWidth + CustomProperties.Margins.medium * 2
    implicitHeight: leftSelectionLayout.implicitHeight + CustomProperties.Margins.small * 2
    color: CustomProperties.Colors.transparentSelectionBackground

    ColumnLayout {
        id: rightSelectionLayout
        spacing: CustomProperties.Margins.small
        anchors.topMargin: CustomProperties.Margins.small
        anchors.bottomMargin: CustomProperties.Margins.small
        anchors.leftMargin: CustomProperties.Margins.medium
        anchors.rightMargin: CustomProperties.Margins.medium
        anchors.fill: parent

        CustomComponents.HeaderText {
            id: rightText
            text: Converter.formatDuration(ui.selectionModel.endUs, Converter.MicroSeconds, Converter.MicroSeconds)
        }

        CustomComponents.HeaderText {
            id: rightdeltaText
            text: "Δ " + Converter.formatDuration(ui.selectionModel.deltaUs, Converter.MicroSeconds, Converter.MicroSeconds)
            visible: ui.selectionModel.startingOnSmallestValueUs
        }
    }
}