javascript - D3: Panning not working in bar chart -


i've tried implement panning bar chart. have written zoom function, bar charts not displayed @ all. want horizontal scrolling , want dragging bound, such when drag elements values go until last minimum value or maximum value defined on x axis.

this have tried far:

var data = [{                                     x: 2,                                     y: 4                                 }, {                                     x: 5,                                     y: 8                                 }, {                                     x: 8,                                     y: 10                                 }, {                                     x: 2,                                     y: 4                                 }, {                                     x: 5,                                     y: 8                                 }, {                                     x: 8,                                     y: 19                                 }, {                                     x: 2,                                     y: 4                                 }, {                                     x: 5,                                     y: 8                                 }, {                                     x: 8,                                     y: 10                                 }, {                                     x: 2,                                     y: 4                                 }, {                                     x: 5,                                     y: 8                                 }, {                                     x: 8,                                     y: 10                                 }, {                                     x: 2,                                     y: 4                                 }, {                                     x: 5,                                     y: 8                                 }, {                                     x: 8,                                     y: 10                                 }, {                                     x: 2,                                     y: 4                                 }, {                                     x: 3,                                     y: 8                                 }, {                                     x: 8,                                     y: 10                                 }, {                                     x: 24,                                     y: 4                                 }, {                                     x: 15,                                     y: 8                                 }, {                                     x: 18,                                     y: 10                                 }];                                   var margin = {                                         top: 20,                                         right: 30,                                         bottom: 30,                                         left: 40                                     },                                     w = 1000 - margin.left - margin.right,                                     h = 500 - margin.top - margin.bottom;                                  var x = d3.scale.linear()                                     .domain([0, d3.max(data, function(d) { return d.x; })])                                     .range([0, w], 0.6);                                  var y = d3.scale.linear()                                     .domain([0, d3.max(data, function(d) { return d.y;})])                                     .range([h, 0]);                                  var xaxis = d3.svg.axis()                                     .scale(x)                                     .orient("bottom");                                  var yaxis = d3.svg.axis()                                     .scale(y)                                     .orient("left");                                  var zoom = d3.behavior.zoom()                                     .scaleextent([1, 1])                                     .x(x)                                     .on("zoom", zoomed);                                  var chart = d3.select("#testchart").append("svg")                                     .attr("width", w + margin.left + margin.right)                                     .attr("height", h + margin.top + margin.bottom)                                     .append("g")                                     .attr("transform", "translate(" + margin.left + "," + margin.top + ")")                                     .call(zoom);                                  var rect = chart.append("rect")                                     .attr("width", w)                                     .attr("height", h)                                     .style("fill", "none")                                     .style("pointer-events", "all");                                  chart.append("g")                                     .attr("class", "x axis")                                     .attr("transform", "translate(0," + h + ")")                                     .call(xaxis)                                  chart.append("g")                                     .attr("class", "y axis")                                     .call(yaxis);                                  var bars = chart.append("g")                                     .attr("class", "chartobjects");                                  bars.selectall(".rect")                                     .data(data)                                     .enter().append("rect")                                     .attr("class", "rectbar")                                     .on("click", hello)                                     .attr('x', function(d) {                                         return x(d.x);                                     })                                     .attr("y", function(d) {                                         return y(d.y);                                     })                                     .attr("height", function(d) {                                         return h - y(d.y);                                     })                                     .attr("width", x.rangeband())                                     .attr("fill", function(d) {                                         return d.y > 6 ? "blue" : "red"                                     });                                  function hello() {                                     alert("hello world!!")                                 }                                  function zoomed() {                                     console.log("entered zoom function!!!");                                     var tx = math.max(0, d3.event.translate[0]),                                     ty = math.min(0, d3.event.translate[1]);                                 zoom.translate([tx, ty]);                                 bars.attr("transform", "translate(" + [tx,ty] + ")scale(" + d3.event.scale + ")");                                 chart.select(".x.axis")                                     .call(xaxis);                                   }


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