Function scaleAndGetShift

src/plots/cartesian/dragbox.js:1025–1032

(ax, scaleFactor)

    }

    function scaleAndGetShift(ax, scaleFactor) {
        if(scaleFactor) {
            ax.range = ax._r.slice();
            scaleZoom(ax, scaleFactor);
            return getShift(ax, scaleFactor);
        }
        return 0;
    }

    function getShift(ax, scaleFactor, from) {
        return ax._length * (1 - scaleFactor) * FROM_TL[from || ax.constraintoward || 'middle'];