我希望帮助纠正我的代码，单击标记圆圈元素以暂停或恢复该元素沿线的转换。我的代码沿一条线移动标记，我可以使用单击按钮元素来暂停和恢复此转换，但我希望能够单击标记圆圈本身，而不是按钮。我使用了各种参考资料，包括：http://www.nytimes.com/interactive/2013/09/25/sports/americas-cup-course.html
http://jsfiddle.net/meetamit/UJuWX/3/
http://jsfiddle.net/Y62Hq/2/
D3 补间 - 暂停和恢复控件
我最终希望能够沿着地理路径对标记进行动画处理，在路径上的点处暂停和恢复，然后单击这些点。
到目前为止，这是我的代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Need help</title>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/d3-array.v1.min.js"></script>
<script src="https://d3js.org/d3-geo.v1.min.js"></script>
<script src="https://d3js.org/d3-queue.v3.min.js"></script>
<style type="text/css">
body{
font-family:"Helvetica Neue", Helvetica, sans-serif;
color: red;
}
button {
position: absolute;
top: 15px;
left: 10px;
background: #004276;
padding-right: 26px;
border-radius: 2px;
cursor: pointer;
}
circle {
fill: steelblue;
stroke: pink;
stroke-width: 3px;
}
.point{
fill:green;
}
.line{
fill: none;
stroke: red;
stroke-width: 4;
stroke-dasharray: 4px,8px;
}
</style>
</head>
<body>
<button>Start</button>
<script>
var w = 960,
h = 500;
var duration = 10000;
var svg = d3.select("body").append("svg")
.attr("width", w)
.attr("height", h);
var line = d3.line()
.x(function(d){return (d)[0];})
.y(function(d){return (d)[1];});
var data =
[
[480, 200],
[580, 400],
[680, 100],
[780, 300],
[180, 300],
[280, 100],
[380, 400]
];
//path to animate
var linepath = svg.append("path")
.data([data])
.attr("d", line)
.attr('class', 'line')
.attr("d", function(d){
console.log(this);
return line(d)
});
var points = svg.selectAll("circle")
.data(data)
.enter()
.append("circle")
.attr("r", 7)
.attr("transform", function(d) { return "translate(" + (d) + ")"; })
.attr("class", "point");
var pauseValues = {
lastTime: 0,
currentTime: 0
};
var marker = svg.append("circle")
.attr("r", 19)
.attr("transform", "translate(" + (data[0]) + ")")
.on('click', function(d,i){
d3.select(this)
.style("fill", "orange")
.transition()
});
function transition() {
marker.transition()
.duration(duration - (duration * pauseValues.lastTime))
.attrTween("transform", translateAlong(linepath.node()))
.on("end", function(){
pauseValues = {
lastT: 0,
currentT: 0
};
transition()
});
}
function translateAlong(path) {
var l = path.getTotalLength();
return function(d, i, a) {
return function(t) {
t += pauseValues.lastTime;
var p = path.getPointAtLength(t * l);
pauseValues.currentTime = t;
return "translate(" + p.x + "," + p.y + ")";
};
};
}
d3.select('button').on('click',function(d,i){
var self = d3.select(this);
if (self.text() == "Pause"){
self.text('Start');
marker.transition()
.duration(0);
setTimeout(function(){
pauseValues.lastTime = pauseValues.currentTime;
}, 100);
}else{
self.text('Pause');
transition();
}
});
</script>
</body>
</html>
