Function computeZoomUpdates

src/plots/polar/polar.js:1053–1061

(update)

    }

    function computeZoomUpdates(update) {
        var rl = radialAxis._rl;
        var m = (rl[1] - rl[0]) / (1 - innerRadius / radius) / radius;
        var newRng = [
            rl[0] + (r0 - innerRadius) * m,
            rl[0] + (r1 - innerRadius) * m
        ];
        update[_this.id + '.radialaxis.range'] = newRng;
    }

    function zoomClick(numClicks, evt) {
        var clickMode = gd._fullLayout.clickmode;