Function removeNodeEdge

src/chart/tree/TreeView.ts:561–629

(
    node: TreeNode,
    data: SeriesData,
    group: graphic.Group,
    seriesModel: TreeSeriesModel,
    removeAnimationOpt: AnimationOption
)

}

function removeNodeEdge(
    node: TreeNode,
    data: SeriesData,
    group: graphic.Group,
    seriesModel: TreeSeriesModel,
    removeAnimationOpt: AnimationOption
) {
    const virtualRoot = data.tree.root;
    const { source, sourceLayout } = getSourceNode(virtualRoot, node);

    const symbolEl: TreeSymbol = data.getItemGraphicEl(node.dataIndex) as TreeSymbol;

    if (!symbolEl) {
        return;
    }

    const sourceSymbolEl = data.getItemGraphicEl(source.dataIndex) as TreeSymbol;
    const sourceEdge = sourceSymbolEl.__edge;

    // 1. when expand the sub tree, delete the children node should delete the edge of
    // the source at the same time. because the polyline edge shape is only owned by the source.
    // 2.when the node is the only children of the source, delete the node should delete the edge of
    // the source at the same time. the same reason as above.
    const edge = symbolEl.__edge
        || ((source.isExpand === false || source.children.length === 1) ? sourceEdge : undefined);

    const edgeShape = seriesModel.get('edgeShape');
    const layoutOpt = seriesModel.get('layout');
    const orient = seriesModel.get('orient');
    const curvature = seriesModel.get(['lineStyle', 'curveness']);

    if (edge) {
        if (edgeShape === 'curve') {
            graphic.removeElement(edge as Path, {
                shape: getEdgeShape(
                    layoutOpt,
                    orient,
                    curvature,
                    sourceLayout,
                    sourceLayout
                ),
                style: {
                    opacity: 0
                }
            }, seriesModel, {
                cb() {
                    group.remove(edge);
                },
                removeOpt: removeAnimationOpt
            });
        }
        else if (edgeShape === 'polyline' && seriesModel.get('layout') === 'orthogonal') {
            graphic.removeElement(edge as Path, {
                shape: {
                    parentPoint: [sourceLayout.x, sourceLayout.y],
                    childPoints: [[sourceLayout.x, sourceLayout.y]]
                },
                style: {