Function makeBrush

src/traces/parcoords/axisbrush.js:491–504

(state, rangeSpecified, initialRange, brushStartCallback, brushCallback, brushEndCallback)

}

function makeBrush(state, rangeSpecified, initialRange, brushStartCallback, brushCallback, brushEndCallback) {
    var filter = makeFilter();
    filter.set(initialRange);
    return {
        filter: filter,
        filterSpecified: rangeSpecified, // there's a difference between not filtering and filtering a non-proper subset
        svgBrush: {
            extent: [], // this is where the svgBrush writes contents into
            brushStartCallback: brushStartCallback,
            brushCallback: axisBrushMoved(brushCallback),
            brushEndCallback: brushEndCallback
        }
    };
}

// for use by supplyDefaults, but it needed tons of pieces from here so
// seemed to make more sense just to put the whole routine here