Function pieces

src/component/visualMap/PiecewiseModel.ts:509–587

(outPieceList)

    },

    pieces(outPieceList) {
        const thisOption = this.option;

        zrUtil.each(thisOption.pieces, function (pieceListItem, index) {

            if (!zrUtil.isObject(pieceListItem)) {
                pieceListItem = {value: pieceListItem};
            }

            const item: InnerVisualPiece = {text: '', index: index};

            if (pieceListItem.label != null) {
                item.text = pieceListItem.label;
            }

            if (pieceListItem.hasOwnProperty('value')) {
                const value = item.value = pieceListItem.value;
                item.interval = [value, value];
                item.close = [1, 1];
            }
            else {
                // `min` `max` is legacy option.
                // `lt` `gt` `lte` `gte` is recommended.
                const interval = item.interval = [] as unknown as [number, number];
                const close: typeof item.close = item.close = [0, 0];

                const closeList = [1, 0, 1] as const;
                const infinityList = [-Infinity, Infinity];

                const useMinMax = [];
                for (let lg = 0; lg < 2; lg++) {
                    const names = ([['gte', 'gt', 'min'], ['lte', 'lt', 'max']] as const)[lg];
                    for (let i = 0; i < 3 && interval[lg] == null; i++) {
                        interval[lg] = pieceListItem[names[i]];
                        close[lg] = closeList[i];
                        useMinMax[lg] = i === 2;
                    }
                    interval[lg] == null && (interval[lg] = infinityList[lg]);
                }
                useMinMax[0] && interval[1] === Infinity && (close[0] = 0);
                useMinMax[1] && interval[0] === -Infinity && (close[1] = 0);

                if (__DEV__) {
                    if (interval[0] > interval[1]) {
                        console.warn(
                            'Piece ' + index + 'is illegal: ' + interval
                            + ' lower bound should not greater then uppper bound.'
                        );
                    }
                }

                if (interval[0] === interval[1] && close[0] && close[1]) {
                    // Consider: [{min: 5, max: 5, visual: {...}}, {min: 0, max: 5}],
                    // we use value to lift the priority when min === max
                    item.value = interval[0];
                }
            }