我的团队还想在 d3 绘制的圆圈内添加图像，并提出以下 (fiddle)：
index.html:
<!doctype html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="timeline.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.js"></script>
<script src="https://code.jquery.com/jquery-2.2.4.js"
integrity="sha256-iT6Q9iMJYuQiMWNd9lDyBUStIq/8PuOW33aOqmvFpqI="
crossorigin="anonymous"></script>
<script src="./timeline.js"></script>
</head>
<body>
<div class="timeline"></div>
</body>
</html>
时间线.css：
.axis path,
.axis line,
.tick line,
.line {
fill: none;
stroke: #000000;
stroke-width: 1px;
}
timeline.js：
// container target
var elem = ".timeline";
var props = {
width: 1000,
height: 600,
class: "timeline-point",
// margins
marginTop: 100,
marginRight: 40,
marginBottom: 100,
marginLeft: 60,
// data inputs
data: [
{
x: 10,
y: 20,
key: "a",
image: "https://unsplash.it/300/300",
id: "a"
},
{
x: 20,
y: 10,
key: "a",
image: "https://unsplash.it/300/300",
id: "b"
},
{
x: 60,
y: 30,
key: "a",
image: "https://unsplash.it/300/300",
id: "c"
},
{
x: 40,
y: 30,
key: "a",
image: "https://unsplash.it/300/300",
id: "d"
},
{
x: 50,
y: 70,
key: "a",
image: "https://unsplash.it/300/300",
id: "e"
},
{
x: 30,
y: 50,
key: "a",
image: "https://unsplash.it/300/300",
id: "f"
},
{
x: 50,
y: 60,
key: "a",
image: "https://unsplash.it/300/300",
id: "g"
}
],
// y label
yLabel: "Y label",
yLabelLength: 50,
// axis ticks
xTicks: 10,
yTicks: 10
}
// component start
var Timeline = {};
/***
*
* Create the svg canvas on which the chart will be rendered
*
***/
Timeline.create = function(elem, props) {
// build the chart foundation
var svg = d3.select(elem).append('svg')
.attr('width', props.width)
.attr('height', props.height);
var g = svg.append('g')
.attr('class', 'point-container')
.attr("transform",
"translate(" + props.marginLeft + "," + props.marginTop + ")");
var g = svg.append('g')
.attr('class', 'line-container')
.attr("transform",
"translate(" + props.marginLeft + "," + props.marginTop + ")");
var xAxis = g.append('g')
.attr("class", "x axis")
.attr("transform", "translate(0," + (props.height - props.marginTop - props.marginBottom) + ")");
var yAxis = g.append('g')
.attr("class", "y axis");
svg.append("text")
.attr("class", "y label")
.attr("text-anchor", "end")
.attr("y", 1)
.attr("x", 0 - ((props.height - props.yLabelLength)/2) )
.attr("dy", ".75em")
.attr("transform", "rotate(-90)")
.text(props.yLabel);
// add placeholders for the axes
this.update(elem, props);
};
/***
*
* Update the svg scales and lines given new data
*
***/
Timeline.update = function(elem, props) {
var self = this;
var domain = self.getDomain(props);
var scales = self.scales(elem, props, domain);
self.drawPoints(elem, props, scales);
};
/***
*
* Use the range of values in the x,y attributes
* of the incoming data to identify the plot domain
*
***/
Timeline.getDomain = function(props) {
var domain = {};
domain.x = props.xDomain || d3.extent(props.data, function(d) { return d.x; });
domain.y = props.yDomain || d3.extent(props.data, function(d) { return d.y; });
return domain;
};
/***
*
* Compute the chart scales
*
***/
Timeline.scales = function(elem, props, domain) {
if (!domain) {
return null;
}
var width = props.width - props.marginRight - props.marginLeft;
var height = props.height - props.marginTop - props.marginBottom;
var x = d3.scale.linear()
.range([0, width])
.domain(domain.x);
var y = d3.scale.linear()
.range([height, 0])
.domain(domain.y);
return {x: x, y: y};
};
/***
*
* Create the chart axes
*
***/
Timeline.axes = function(props, scales) {
var xAxis = d3.svg.axis()
.scale(scales.x)
.orient("bottom")
.ticks(props.xTicks)
.tickFormat(d3.format("d"));
var yAxis = d3.svg.axis()
.scale(scales.y)
.orient("left")
.ticks(props.yTicks);
return {
xAxis: xAxis,
yAxis: yAxis
}
};
/***
*
* Use the general update pattern to draw the points
*
***/
Timeline.drawPoints = function(elem, props, scales, prevScales, dispatcher) {
var g = d3.select(elem).selectAll('.point-container');
var color = d3.scale.category10();
// add images
var image = g.selectAll('.image')
.data(props.data)
image.enter()
.append("pattern")
.attr("id", function(d) {return d.id})
.attr("class", "svg-image")
.attr("x", "0")
.attr("y", "0")
.attr("height", "70px")
.attr("width", "70px")
.append("image")
.attr("x", "0")
.attr("y", "0")
.attr("height", "70px")
.attr("width", "70px")
.attr("xlink:href", function(d) {return d.image})
var point = g.selectAll('.point')
.data(props.data);
// enter
point.enter()
.append("circle")
.attr("class", "point")
.on('mouseover', function(d) {
d3.select(elem).selectAll(".point").classed("active", false);
d3.select(this).classed("active", true);
if (props.onMouseover) {
props.onMouseover(d)
};
})
.on('mouseout', function(d) {
if (props.onMouseout) {
props.onMouseout(d)
};
})
// enter and update
point.transition()
.duration(1000)
.attr("cx", function(d) {
return scales.x(d.x);
})
.attr("cy", function(d) {
return scales.y(d.y);
})
.attr("r", 30)
.style("stroke", function(d) {
if (props.pointStroke) {
return d.color = props.pointStroke;
} else {
return d.color = color(d.key);
}
})
.style("fill", function(d) {
if (d.image) {
return ("url(#" + d.id + ")");
}
if (props.pointFill) {
return d.color = props.pointFill;
} else {
return d.color = color(d.key);
}
});
// exit
point.exit()
.remove();
// update the axes
var axes = this.axes(props, scales);
d3.select(elem).selectAll('g.x.axis')
.transition()
.duration(1000)
.call(axes.xAxis);
d3.select(elem).selectAll('g.y.axis')
.transition()
.duration(1000)
.call(axes.yAxis);
};
$(document).ready(function() {
Timeline.create(elem, props);
})