Function mapSymbolLayout

src/chart/map/mapSymbolLayout.ts:30–80

(ecModel: GlobalModel)

export const mapSymbolLayoutStageHandler = createSimpleOverallStageHandler(SERIES_TYPE_MAP, mapSymbolLayout);

function mapSymbolLayout(ecModel: GlobalModel) {

    each(buildAllMapSeriesGroups(ecModel), function (mapSeriesGroup, groupKey) {
        if (!getMainMapSeries(mapSeriesGroup) || !mapSeriesGroupHasOwnGeo(groupKey)) {
            // map series on separate geo components only provide "choropleth map", but symbols are ignored.
            return;
        }

        const mapSymbolOffsets = {} as Dictionary<number>;

        each(mapSeriesGroup.f, function (subMapSeries) {
            const geo = subMapSeries.coordinateSystem;
            const data = subMapSeries.originalData;

            if (subMapSeries.get('showLegendSymbol') && ecModel.getComponent('legend')) {
                data.each(data.mapDimension('value'), function (value, idx) {
                    const name = data.getName(idx);
                    const region = geo.getRegion(name);

                    // If input series.data is [11, 22, '-'/null/undefined, 44],
                    // it will be filled with NaN: [11, 22, NaN, 44] and NaN will
                    // not be drawn. So here must validate if value is NaN.
                    if (!region || isNaN(value as number)) {
                        return;
                    }

                    const offset = mapSymbolOffsets[name] || 0;

                    const point = geo.dataToPoint(region.getCenter());

                    mapSymbolOffsets[name] = offset + 1;

                    data.setItemLayout(idx, {
                        point: point,
                        offset: offset
                    });
                });
            }
        });

        // Show label of those region not has legendIcon (which is offset 0)
        const data = getMainMapSeries(mapSeriesGroup).getData();
        data.each(function (idx) {
            const name = data.getName(idx);
            const layout = data.getItemLayout(idx) || {};
            layout.showLabel = !mapSymbolOffsets[name];
            data.setItemLayout(idx, layout);
        });

    });
}