function zoomed() {
                if (self.onVizChangeFn && d3.event) {
                        self.onVizChangeFn.call(self, {
                        scale: d3.event.scale,
                        translate: d3.event.translate,
                        domain: [x.domain()]
                    });
                }
                var t = zoom.translate(),
                     tx = t[0],
                     ty = t[1];

                tx = Math.min(0, tx),
                tx = Math.max(width - maxDt, tx),
                zoom.translate([tx, ty]);
                svg.select('.x.axis').call(xAxis);

                svg.selectAll('rect.interval').attr('x', function (d) {
                    return x(d.from);
                }).attr('width', function (d) {
                    return Math.max(options.intervalMinWidth, x(d.to) - x(d.from));
                });

            }
        }