Method _updateLabelLine

src/label/LabelManager.ts:501–526

(el: Element, seriesModel: SeriesModel)

    }

    private _updateLabelLine(el: Element, seriesModel: SeriesModel) {
        // Only support label being hosted on graphic elements.
        const textEl = el.getTextContent();
        // Update label line style.
        const ecData = getECData(el);
        const dataIndex = ecData.dataIndex;

        // Only support labelLine on the labels represent data.
        if (textEl && dataIndex != null) {
            const data = seriesModel.getData(ecData.dataType);
            const itemModel = data.getItemModel<LabelLineOptionMixin>(dataIndex);

            const defaultStyle: PathStyleProps = {};
            const visualStyle = data.getItemVisual(dataIndex, 'style');
            if (visualStyle) {
                const visualType = data.getVisual('drawType');
                // Default to be same with main color
                defaultStyle.stroke = visualStyle[visualType];
            }
            const labelLineModel = itemModel.getModel('labelLine');

            setLabelLineStyle(el, getLabelLineStatesModels(itemModel), defaultStyle);

            updateLabelLinePoints(el, labelLineModel);
        }
    }

    private _animateLabels(el: Element, seriesModel: SeriesModel) {
        const textEl = el.getTextContent();