Function pieLabelLayout

src/chart/pie/labelLayout.ts:349–594

(
    seriesModel: PieSeriesModel
)

}

export default function pieLabelLayout(
    seriesModel: PieSeriesModel
) {
    const data = seriesModel.getData();
    const labelLayoutList: LabelLayout[] = [];
    let cx;
    let cy;
    let hasLabelRotate = false;
    const minShowLabelRadian = (seriesModel.get('minShowLabelAngle') || 0) * RADIAN;

    const viewRect = data.getLayout('viewRect') as RectLike;
    const r = data.getLayout('r') as number;
    const viewWidth = viewRect.width;
    const viewLeft = viewRect.x;
    const viewTop = viewRect.y;
    const viewHeight = viewRect.height;

    function setNotShow(el: {ignore: boolean}) {
        el.ignore = true;
    }

    function isLabelShown(label: ZRText) {
        if (!label.ignore) {
            return true;
        }
        for (const key in label.states) {
            if (label.states[key].ignore === false) {
                return true;
            }
        }
        return false;
    }

    data.each(function (idx) {
        const sector = data.getItemGraphicEl(idx) as Sector;
        const sectorShape = sector.shape;
        const label = sector.getTextContent();
        const labelLine = sector.getTextGuideLine();

        const itemModel = data.getItemModel<PieDataItemOption>(idx);
        const labelModel = itemModel.getModel('label');
        // Use position in normal or emphasis
        const labelPosition = labelModel.get('position') || itemModel.get(['emphasis', 'label', 'position']);
        const labelDistance = labelModel.get('distanceToLabelLine');
        const labelAlignTo = labelModel.get('alignTo');
        const edgeDistance = parsePercent(labelModel.get('edgeDistance'), viewWidth);
        let bleedMargin = labelModel.get('bleedMargin');
        if (bleedMargin == null) {
            // An arbitrary strategy for small viewRect - especial pie is layout in calendar or matrix coord sys.
            bleedMargin = Math.min(viewWidth, viewHeight) > 200 ? 10 : 2;
        }

        const labelLineModel = itemModel.getModel('labelLine');
        let labelLineLen = labelLineModel.get('length');
        labelLineLen = parsePercent(labelLineLen, viewWidth);
        let labelLineLen2 = labelLineModel.get('length2');
        labelLineLen2 = parsePercent(labelLineLen2, viewWidth);