Method build

docs/app/js/sanddance-app.js:4031–4085

()

        };
    }
    build() {
        const { names , props  } = this;
        const { aggregation , globalScope , groupings , onBuild , parentScope  } = props;
        const { sizeSignals  } = parentScope;
        (0, _scope.addTransforms)(globalScope.data, Object.assign(Object.assign({}, this.getTransforms(aggregation, (0, _scope.getGroupBy)(groupings))), {
            as: [
                names.aggregateField
            ]
        }), {
            type: "extent",
            field: (0, _expr.safeFieldName)(names.aggregateField),
            signal: names.globalAggregateExtentSignal
        });
        const localAggregateMaxExtent = `datum[${JSON.stringify(names.aggregateField)}]`;
        const squareMaxSide = `min((${sizeSignals.layoutHeight}), (${sizeSignals.layoutWidth}))`;
        const squareMaxArea = `(${[
            squareMaxSide,
            squareMaxSide
        ].join(" * ")})`;
        const shrinkRatio = `((${localAggregateMaxExtent}) / (${names.globalAggregateExtentSignal}[1]))`;
        const squareArea = `(${[
            squareMaxArea,
            shrinkRatio
        ].join(" * ")})`;
        const squareSide = `sqrt(${squareArea})`;
        const localAggregateMaxExtentScaled = squareSide;
        onBuild && onBuild(localAggregateMaxExtent, localAggregateMaxExtentScaled);
        const offsets = {
            x: (0, _scope.addOffsets)(parentScope.offsets.x, `(${parentScope.offsets.w} - ${squareSide}) / 2`),
            y: (0, _scope.addOffsets)(parentScope.offsets.y, `(${parentScope.offsets.h} - ${squareSide}) / 2`),
            h: squareSide,
            w: squareSide
        };
        return {
            offsets,
            sizeSignals: {
                layoutHeight: null,
                layoutWidth: null
            },
            encodingRuleMap: {
                y: [
                    {
                        test: (0, _selection.testForCollapseSelection)(),
                        signal: offsets.y
                    }
                ],
                height: [
                    {
                        test: (0, _selection.testForCollapseSelection)(),
                        value: 0
                    }
                ]
            }
        };
    }
    getTransforms(aggregation, groupby) {
        const trans = {
            type: "joinaggregate",