echarts/src/visual/symbol.js

A powerful charting and visualization library for browser

export default function (seriesType, defaultSymbolType, legendSymbol) {
    // Encoding visual for all series include which is filtered for legend drawing
    return {
        seriesType: seriesType,
        performRawSeries: true,
        reset: function (seriesModel, ecModel, api) {
            var data = seriesModel.getData();

            var symbolType = seriesModel.get('symbol') || defaultSymbolType;
            var symbolSize = seriesModel.get('symbolSize');

            data.setVisual({
                legendSymbol: legendSymbol || symbolType,
                symbol: symbolType,
                symbolSize: symbolSize
            });

            // Only visible series has each data be visual encoded
            if (ecModel.isSeriesFiltered(seriesModel)) {
                return;
            }

            var hasCallback = typeof symbolSize === 'function';

            function dataEach(data, idx) {
                if (typeof symbolSize === 'function') {
                    var rawValue = seriesModel.getRawValue(idx);
                    // FIXME
                    var params = seriesModel.getDataParams(idx);
                    data.setItemVisual(idx, 'symbolSize', symbolSize(rawValue, params));
                }

                if (data.hasItemOption) {
                    var itemModel = data.getItemModel(idx);
                    var itemSymbolType = itemModel.getShallow('symbol', true);
                    var itemSymbolSize = itemModel.getShallow('symbolSize', true);
                    // If has item symbol
                    if (itemSymbolType != null) {
                        data.setItemVisual(idx, 'symbol', itemSymbolType);
                    }
                    if (itemSymbolSize != null) {
                        // PENDING Transform symbolSize ?
                        data.setItemVisual(idx, 'symbolSize', itemSymbolSize);
                    }
                }
            }

            return { dataEach: (data.hasItemOption || hasCallback) ? dataEach : null };
        }
    };
}