Function axisTrigger

src/component/axisPointer/axisTrigger.ts:113–211

(
    payload: AxisTriggerPayload,
    ecModel: GlobalModel,
    api: ExtensionAPI
)

 * @return content of event obj for echarts.connect.
 */
export default function axisTrigger(
    payload: AxisTriggerPayload,
    ecModel: GlobalModel,
    api: ExtensionAPI
) {
    const currTrigger = payload.currTrigger;
    let point = [payload.x, payload.y];
    const finder = payload;
    const dispatchAction = payload.dispatchAction || bind(api.dispatchAction, api);
    const coordSysAxesInfo = (ecModel.getComponent('axisPointer') as AxisPointerModel)
        .coordSysAxesInfo as CollectedCoordInfo;

    // Pending
    // See #6121. But we are not able to reproduce it yet.
    if (!coordSysAxesInfo) {
        return;
    }

    if (illegalPoint(point)) {
        // Used in the default behavior of `connection`: use the sample seriesIndex
        // and dataIndex. And also used in the tooltipView trigger.
        point = findPointFromSeries({
            seriesIndex: finder.seriesIndex,
            // Do not use dataIndexInside from other ec instance.
            // FIXME: auto detect it?
            dataIndex: finder.dataIndex
        }, ecModel).point;
    }
    const isIllegalPoint = illegalPoint(point);

    // Axis and value can be specified when calling dispatchAction({type: 'updateAxisPointer'}).
    // Notice: In this case, it is difficult to get the `point` (which is necessary to show
    // tooltip, so if point is not given, we just use the point found by sample seriesIndex
    // and dataIndex.
    const inputAxesInfo = finder.axesInfo;

    const axesInfo = coordSysAxesInfo.axesInfo;
    const shouldHide = currTrigger === 'leave' || illegalPoint(point);
    const outputPayload = {} as AxisTriggerPayload;

    const showValueMap: ShowValueMap = {};
    const dataByCoordSys: DataByCoordSysCollection = {
        list: [],
        map: {}
    };
    const updaters = {
        showPointer: curry(showPointer, showValueMap),
        showTooltip: curry(showTooltip, dataByCoordSys)
    };

    // Process for triggered axes.
    each(coordSysAxesInfo.coordSysMap, function (coordSys, coordSysKey) {
        // If a point given, it must be contained by the coordinate system.
        const coordSysContainsPoint = isIllegalPoint || coordSys.containPoint(point);

        each(coordSysAxesInfo.coordSysAxesInfo[coordSysKey], function (axisInfo, key) {
            const axis = axisInfo.axis;
            const inputAxisInfo = findInputAxisInfo(inputAxesInfo, axisInfo);