您好我正在尝试使用D3暂停和恢复标记沿着路径的转换，例如此示例D3 tween - pause and resume controls加上停止标记在特定数据点上的转换{{3 }}。我通过单击标记开始转换，并希望能够停止它，然后在单击时重新启动它 - 此时它暂停一段时间然后开始。
我希望能够完全停止标记，以便我可以使用点进行操作，即点击xlink：href根据其json数据查找特定的点击点，然后离开页面 - 然后返回标记转换并从它停止的同一点恢复转换。
我想我需要将pauseValues传递给转换函数，但却无法理解如何执行此操作。
这是我的代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style type="text/css">
body {
font-family: "Helvetica Neue", Helvetica, sans-serif;
color: red;
}
circle {
fill: steelblue;
stroke: steelblue;
stroke-width: 3px;
}
.point {
fill: green;
}
.line {
fill: none;
stroke: red;
stroke-width: 4;
stroke-dasharray: 4px, 8px;
}
</style>
<body>
<script>
var width = 960,
height = 500;
var data = [
[610.4199794444444, 243.7191682432953], //Paris
[480, 200],
[580, 400],
[680, 100],
[780, 300],
[180, 300],
[280, 100],
[380, 400]
];
var duration = 20000/data.length,
pauseTime = 2000;
var line = d3.line()
.x(function(d) {
return (d)[0];
})
.y(function(d) {
return (d)[1];
});
var svg = d3.select("body")
.append("svg")
.attr("width", width)
.attr("height", height);
//path to animate - marker transitions along this path
var path = svg.append("path")
.data([data])
.attr("d", line)
.attr('class', 'line')
.attr("d", function(d) {
return line(d)
});
//Want to activate circles when marker paused on them - intention is to have on click to href and stop marker while href is displayed
svg.selectAll("circle")
.data(data)
.enter()
.append("circle")
.attr("class", "point")
.attr("r", 10)
.attr("transform", function(d) {
return "translate(" + d + ")";
})
.on('click', function(d, i) {
d3.select(this)
.style("fill", "pink")
//sample - data will be for each point and based on the geojson in real example
.append("a")
.attr("xlink:href", "http://collections.anmm.gov.au/en/objects/details/11429/")
pausePoints.push(i);
console.log("pausePoints_push_i: " +pausePoints.push(i));
console.log("pausePoints: " + pausePoints);
if (pausePoints.length === 1)
transition();
});
var marker = svg.append("circle")
.attr("r", 19)
.attr("transform", "translate(" + (data[0]) + ")")
.on('click', function(d, i) {
d3.select(this)
.style("fill", "pink")
pausePoints.push(i);
if (pausePoints.length === 1)
setTimeout(function() {
pauseValues.lastTime = pauseValues.currentTime;
}, 100);
transition();
});
var pauseValues = {
lastTime: 0,
currentTime: 0
};
var pausePoints = [],
iter = 0,
transData = data.slice();
function transition() {
marker.transition()
.ease(d3.easeLinear)
.duration(duration - (duration * pauseValues.lastTime))
.attrTween("transform", function(){
var p0 = transData.shift(),
p1 = transData[0];
m = (p0[1] - p1[1]) / (p0[0] - p1[0]),
b = p0[1] - (m * p0[0]),
i = d3.interpolateNumber(p0[0], p1[0]);
return function(t){
//console.log("T: " +t);
var x = i(t),
y = m*x + b;
return "translate(" + x + "," + y + ")";
}
})
.on("end", function(){
if (transData.length <= 1) return;
iter++;
setTimeout(transition, pausePoints.indexOf(iter) !== -1 ? pauseTime : 0);
});
};
</script>
</body>
答案 0 :(得分：1)
我帮你解决了上一个问题。从我写的代码中，您引入了这个变量pauseValues，它打算做什么？据我所知，它试图根据之前的暂停来调整持续时间;当您在所有路径上运行一个长转换时，您只需要这个。我的代码将每条腿作为单个过渡运行。如果你想暂停和继续点击这里是一个简单的重构：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<style type="text/css">
body {
font-family: "Helvetica Neue", Helvetica, sans-serif;
color: red;
}
circle {
fill: steelblue;
stroke: steelblue;
stroke-width: 3px;
}
.point {
fill: green;
}
.line {
fill: none;
stroke: red;
stroke-width: 4;
stroke-dasharray: 4px, 8px;
}
</style>
<body>
<script>
var width = 960,
height = 500;
var data = [
[610.4199794444444, 243.7191682432953], //Paris
[480, 200],
[580, 400],
[680, 100],
[780, 300],
[180, 300],
[280, 100],
[380, 400]
];
var duration = 20000 / data.length,
pauseTime = 2000;
var line = d3.line()
.x(function(d) {
return (d)[0];
})
.y(function(d) {
return (d)[1];
});
var svg = d3.select("body")
.append("svg")
.attr("width", width)
.attr("height", height);
//path to animate - marker transitions along this path
var path = svg.append("path")
.data([data])
.attr("d", line)
.attr('class', 'line')
.attr("d", function(d) {
return line(d)
});
//Want to activate circles when marker paused on them - intention is to have on click to href and stop marker while href is displayed
svg.selectAll("circle")
.data(data)
.enter()
.append("circle")
.attr("class", "point")
.attr("r", 10)
.attr("transform", function(d) {
return "translate(" + d + ")";
})
.on('click', function(d, i) {
d3.select(this)
.style("fill", "pink")
//sample - data will be for each point and based on the geojson in real example
.append("a")
.attr("xlink:href", "http://collections.anmm.gov.au/en/objects/details/11429/")
pausePoints.push(i);
if (pausePoints.length === 1)
transition();
});
var marker = svg.append("circle")
.attr("r", 19)
.attr("transform", "translate(" + (data[0]) + ")")
.on('click', function(d, i) {
transition();
});
var pausePoints = [],
iter = 0;
transData = data.slice();
function transition() {
marker.transition()
.ease(d3.easeLinear)
.duration(duration)
.attrTween("transform", function() {
var p0 = transData.shift(),
p1 = transData[0],
m = (p0[1] - p1[1]) / (p0[0] - p1[0]),
b = p0[1] - (m * p0[0]),
interp = d3.interpolateNumber(p0[0], p1[0]);
return function(t) {
var x = interp(t),
y = m * x + b;
return "translate(" + x + "," + y + ")";
}
})
.on("end", function() {
iter++;
if (
transData.length <= 1 || // out of points
pausePoints.indexOf(iter) !== -1) // on a clicked point
{
return;
}
transition();
});
};
</script>
</body>