这是我使用d3.js的堆积条形图。目前只能看到特定数量的条形（在我的例子中为4条）。我希望当我点击下一个按钮时，接下来的4个是可见的，依此类推。 但我无法实现此功能。重绘功能无法正常工作 在此先感谢您的帮助。 这是我的小提琴：js-fiddle
var data = [
{
"key": "Key_2",
"values": [
{"x": "Cols # 21", "y": 70},
{"x": "Cols # 9", "y": 39},
{"x": "Cols # 8", "y": 96},
{"x": "Cols # 16", "y": 21},
{"x": "Cols # 43", "y": 95},
{"x": "Cols # 49", "y": 24},
{"x": "Cols # 23", "y": 95},
{"x": "Cols # 89", "y": 24},
{"x": "Cols # 55", "y": 54},
{"x": "Cols # 65", "y": 24}
]
},
{
"key": "Key_1",
"values": [
{"x": "Cols # 21", "y": 93},
{"x": "Cols # 9", "y": 73},
{"x": "Cols # 8", "y": 94},
{"x": "Cols # 16", "y": 80},
{"x": "Cols # 43", "y": 56},
{"x": "Cols # 49", "y": 83},
{"x": "Cols # 23", "y": 95},
{"x": "Cols # 89", "y": 24},
{"x": "Cols # 55", "y": 74},
{"x": "Cols # 65", "y": 24}
]
},
{
"key": "Key_0",
"values": [
{"x": "Cols # 21", "y": 38},
{"x": "Cols # 9", "y": 88},
{"x": "Cols # 8", "y": 7},
{"x": "Cols # 16", "y": 288},
{"x": "Cols # 43", "y": 40},
{"x": "Cols # 49", "y": 77},
{"x": "Cols # 23", "y": 95},
{"x": "Cols # 89", "y": 24},
{"x": "Cols # 55", "y": 24},
{"x": "Cols # 65", "y": 24}
]
}
];
var temp = [
{
"key": "Key_2",
"values": [
]
},
{
"key": "Key_1",
"values": [
]
},
{
"key": "Key_0",
"values": [
]
}
];
var margin = {top: 40, right: 10, bottom: 20, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
stack = d3.layout.stack().values(function(d){ return d.values;}),
totalColumns=0,
p=0,
viewdata,
barCount=4,
count=0;
//Calulate totals for each x value in the domain
var totals = {};
data.forEach(function(series){
series.values.forEach(function(item){
totals[item.x] = (totals[item.x] || 0 ) + item.y
count++;
})
})
for(var k in data)
{ //console.log("hi")
for(i=0;i<barCount;i++)
{
temp[k].values.push(data[k].values[i])
}
}
stack(temp);
var yMax = d3.max(temp, function(layer) { return d3.max(layer.values, function(d) { return d.y0 + d.y; }); }),
keys = temp[0].values.map(function(item){return item.x });
var x = d3.scale.ordinal()
.domain(keys)
.rangeRoundBands([0, width], .5);
var y = d3.scale.linear()
.domain([0, yMax])
.range([height, 0]);
var color = d3.scale.linear()
.domain([0, data.length - 1])
.range(["#00f", "#000"]);
var yAxis = d3.svg.axis()
.scale(y)
.tickSize(10)
.tickPadding(6)
.orient("left");
totalColumns =count/data.length;
var xAxis = d3.svg.axis()
.scale(x)
.tickSize(10)
.tickPadding(6)
.orient("bottom");
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom+100)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
//viewdata = data.slice(p,2);
var layer = svg.selectAll(".layer")
.data(temp)
.enter().append("g")
.attr("class", "layer")
.style("fill", function(d, i) { return color(i); });
layer.selectAll("rect")
.data(function(d){return d.values;})
.enter().append("rect")
.attr("fill-opacity", 0.5)
.attr("stroke", "#000")
.attr("width",100)
.attr("x", function(d) { return x(d.x); })
.attr("y", function(d) { return y(d.y0 + d.y); })
.attr("height", function(d) { return y(d.y0) - y(d.y0 + d.y); });
layer.selectAll("text")
.data(keys)
.enter().append("text")
.text( function(d){return totals[d];})
.attr('fill', '#000')
.style('font-size', 15)
.attr("x", function(d){ return x(d) + 25})
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
var prev=svg.append("svg:image")
.attr("xlink:href","http://www.visitliverpool.com/images/button_highlight_prev.gif")
.attr("id","prev")
.attr("class","pagingButton")
.attr("x", -5)
.attr("y",480)
.attr("dy", "2.90em")
.attr("dx", "1.75em")
.attr("width", 45).attr("height", 25)
.on("click",onPrevClick)
var next=svg.append("svg:image")
.attr("xlink:href","http://www.visitliverpool.com/images/button_highlight_next.gif")
.attr("class","pagingButton")
.attr("id","next")
.attr("x", 95)
.attr("y",480)
.attr("dy", "2.90em")
.attr("dx", "1.75em")
.attr("width", 45).attr("height", 25)
.on("click",onNextClick)
initial=Math.floor(totalColumns/barCount);
if(totalColumns%barCount==0){
initial--;
}
function onNextClick(){
$("#prev").show();
emptyTemp();
initial--;
if(initial<=0){
$("#next").hide();
}
p+=barCount;
if(p>=totalColumns){
//p-=barCount;
for(var k in temp){
for(i=p;i<totalColumns;i++){
temp[k].values.push(data[k].values[i]);
}
}
}
else{
//viewdata = data.slice(p,p+barCount);
for(var k in temp){
for(i=p;i<p+barCount;i++){
temp[k].values.push(data[k].values[i]);
}
}
}
redraw();
}
function emptyTemp(){
for(var k in temp){
temp[k].values=[];
}
}
function onPrevClick(){
$("#next").show();
emptyTemp();
initial++;
p-=barCount;
if(p<=0){
$("#prev").hide();
p=0;
}
else{
//viewdata = data.slice(p,p+barCount);
for(var k in temp){
for(i=p;i<p+barCount;i++){
temp[k].values.push(data[k].values[i]);
}
}
redraw();
}
}
function redraw(){
var layers = svg.selectAll(".layer")
.data(temp)
.enter().append("g")
.attr("class", "layer")
.style("fill", function(d, i) { return color(i); });
var rects=layers.selectAll("rect")
.data(function(d){return d.values;});
rects.enter()
.append("rect");
rects.exit()
.remove();
rects
.attr("fill-opacity", .5)
.attr("stroke", "#000")
.attr("width",100)
.attr("x", function(d) { return x(d.x); })
.attr("y", function(d) { return y(d.y0 + d.y); })
.attr("height", function(d) { return y(d.y0) - y(d.y0 + d.y); });
layer.selectAll("text")
.data(keys)
.enter().append("text")
.text( function(d){return totals[d];})
.attr('fill', '#000')
.style('font-size', 15)
.attr("x", function(d){ return x(d) + 25})
}