最近我将我的图形迁移到v6，其中我用join()替换了enter(),remove(),exit()模式。不幸的是，我不能再更改链接文本了。通常，文本应该在"蓝色"之间切换。和";green"一旦链接被点击。
我知道，我附加了一个新的文本对象，而不是更新现有的值。这就是问题所在。它在浏览器检查器中可见。但是我不知道如何调整代码，因为join()在这一点上不起作用。
提示吗?
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>D3 JOIN Test</title>
<!-- call external d3.js framework -->
<script src="https://d3js.org/d3.v6.js"></script>
<!-- import multiselection framework -->
<script src="https://d3js.org/d3-selection-multi.v1.js"></script>
</head>
<style>
body {
overflow: hidden;
margin: 0px;
}
.canvas {
background-color: rgb(220, 220, 220);
}
.link {
cursor: pointer;
stroke: rgb(0, 0, 0);
stroke-width: 4px;
}
.link:hover {
stroke: red;
}
</style>
<body>
<svg id="svg"> </svg>
<script>
var graph = {
"nodes": [
{
"id": 1,
},
{
"id": 2,
},
{
"id": 3,
}
],
"links": [
{
"source": 1,
"target": 2,
"type": "blue"
},
{
"source": 2,
"target": 3,
"type": "blue"
},
{
"source": 3,
"target": 1,
"type": "blue"
}
]
}
// declare initial variables
var svg = d3.select("svg")
width = window.innerWidth
height = window.innerHeight
// define cavnas area to draw everything
svg = d3.select("svg")
.attr("class", "canvas")
.attr("width", width)
.attr("height", height)
.call(d3.zoom().on("zoom", function (event) {
svg.attr("transform", event.transform)
}))
.append("g")
// remove zoom on dblclick listener
d3.select("svg").on("dblclick.zoom", null)
var linksContainer = svg.append("g").attr("class", "linksContainer")
var nodesContainer = svg.append("g").attr("class", "nodesContainer")
// iniital force simulation
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function (d) {
return d.id;
}).distance(200))
.force("charge", d3.forceManyBody().strength(-100))
.force("center", d3.forceCenter(width / 2, height / 2))
.force("attraceForce", d3.forceManyBody().strength(70));
initialze()
function initialze() {
links = linksContainer.selectAll(".link")
.data(graph.links)
.join("line")
.attr("class", "link")
.on("click", click)
linkPaths = linksContainer.selectAll(".linkPath")
.data(graph.links)
.join("path")
.style("pointer-events", "none")
.attrs({
"class": "linkPath",
"fill-opacity": 1,
"stroke-opacity": 1,
"id": function (d, i) { return "linkPath" + i }
})
.style("display", "block")
linkLabels = linksContainer.selectAll(".linkLabel")
.data(graph.links)
.join("text")
.style("pointer-events", "none")
.attrs({
"class": "linkLabel",
"id": function (d, i) { return "linkLabel" + i },
"font-size": 16,
"fill": "black"
})
.style("display", "block")
linkLabels
.append("textPath")
.attr('xlink:href', function (d, i) { return '#linkPath' + i })
.style("text-anchor", "middle")
.style("pointer-events", "none")
.attr("startOffset", "50%")
.text(function (d) { return d.type })
nodes = nodesContainer.selectAll(".node")
.data(graph.nodes, d => d.id)
.join("circle")
.attr("class", "node")
.attr("r", 30)
.attr("fill", "whitesmoke")
.attr("stroke", "white")
.call(d3.drag()
.on("start", dragStarted)
.on("drag", dragged)
.on("end", dragEnded)
)
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation
.force("link")
.links(graph.links)
}
function mouseEnter(event, d) {
d3.select(this).style("fill", "lightblue")
}
function mouseLeave(event, d) {
d3.select(this).style("fill", "whitesmoke")
}
function click(event, d) {
if (d.type == "blue") {
d.type = "green"
} else if (d.type == "green") {
d.tyoe = "blue"
}
initialze()
}
function close() {
contextMenuLink.classList.remove("active")
}
function ticked() {
links
.attr("x1", function (d) {
return d.source.x;
})
.attr("y1", function (d) {
return d.source.y;
})
.attr("x2", function (d) {
return d.target.x;
})
.attr("y2", function (d) {
return d.target.y;
});
nodes
.attr("transform", function (d) {
return "translate(" + d.x + ", " + d.y + ")";
});
linkPaths.attr('d', function (d) {
return 'M ' + d.source.x + ' ' + d.source.y + ' L ' + d.target.x + ' ' + d.target.y;
});
linkLabels.attr('transform', function (d) {
if (d.target.x < d.source.x) {
var bbox = this.getBBox();
rx = bbox.x + bbox.width / 2;
ry = bbox.y + bbox.height / 2;
return 'rotate(180 ' + rx + ' ' + ry + ')';
}
else {
return 'rotate(0)';
}
});
}
function dragStarted(event, d) {
if (!event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(event, d) {
d.fx = event.x;
d.fy = event.y;
}
function dragEnded(event, d) {
if (!event.active) simulation.alphaTarget(0);
d.fx = undefined;
d.fy = undefined;
}
</script>
</body>
</html>对于那些面临类似问题的人。我尝试了一下，并通过向linklabel"添加一个空的。text(")属性来完成它。类。正确的版本如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>D3 JOIN Test</title>
<!-- call external d3.js framework -->
<script src="https://d3js.org/d3.v6.js"></script>
</head>
<style>
body {
overflow: hidden;
margin: 0px;
}
.canvas {
background-color: rgb(220, 220, 220);
}
.link {
cursor: pointer;
stroke: rgb(0, 0, 0);
stroke-width: 4px;
}
.link:hover {
stroke: red;
}
</style>
<body>
<svg id="svg"> </svg>
<script>
var graph = {
"nodes": [
{
"id": 1,
},
{
"id": 2,
},
{
"id": 3,
}
],
"links": [
{
"source": 1,
"target": 2,
"type": "blue"
},
{
"source": 2,
"target": 3,
"type": "blue"
},
{
"source": 3,
"target": 1,
"type": "blue"
}
]
}
// declare initial variables
var svg = d3.select("svg")
width = window.innerWidth
height = window.innerHeight
// define cavnas area to draw everything
svg = d3.select("svg")
.attr("class", "canvas")
.attr("width", width)
.attr("height", height)
.call(d3.zoom().on("zoom", function (event) {
svg.attr("transform", event.transform)
}))
.append("g")
// remove zoom on dblclick listener
d3.select("svg").on("dblclick.zoom", null)
var linksContainer = svg.append("g").attr("class", "linksContainer")
var nodesContainer = svg.append("g").attr("class", "nodesContainer")
// iniital force simulation
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function (d) {
return d.id;
}).distance(200))
.force("charge", d3.forceManyBody().strength(-100))
.force("center", d3.forceCenter(width / 2, height / 2))
.force("attraceForce", d3.forceManyBody().strength(70));
initialze()
function initialze() {
links = linksContainer.selectAll(".link")
.data(graph.links)
.join("line")
.attr("class", "link")
.on("click", click)
linkPaths = linksContainer.selectAll(".linkPath")
.data(graph.links)
.join("path")
.attr("class", "linkPath")
.attr("id", function (d, i) { return "linkPath" + i })
linkLabels = linksContainer.selectAll(".linkLabel")
.data(graph.links)
.join("text")
.attr("class", "linkLabel")
.attr("id", function (d, i) { return "linkLabel" + i })
.attr("font-size", 16)
.attr("fill", "black")
.text("")
linkLabels
.append("textPath")
.attr('xlink:href', function (d, i) { return '#linkPath' + i })
.style("text-anchor", "middle")
.attr("startOffset", "50%")
.text(function (d) { return d.type })
nodes = nodesContainer.selectAll(".node")
.data(graph.nodes, d => d.id)
.join("circle")
.attr("class", "node")
.attr("r", 30)
.attr("fill", "whitesmoke")
.attr("stroke", "white")
.call(d3.drag()
.on("start", dragStarted)
.on("drag", dragged)
.on("end", dragEnded)
)
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation
.force("link")
.links(graph.links)
}
function click(event, d) {
if (d.type == "blue") {
d.type = "green"
} else if (d.type == "green") {
d.type = "blue"
}
initialze()
}
function ticked() {
links
.attr("x1", function (d) {
return d.source.x;
})
.attr("y1", function (d) {
return d.source.y;
})
.attr("x2", function (d) {
return d.target.x;
})
.attr("y2", function (d) {
return d.target.y;
});
nodes
.attr("transform", function (d) {
return "translate(" + d.x + ", " + d.y + ")";
});
linkPaths.attr('d', function (d) {
return 'M ' + d.source.x + ' ' + d.source.y + ' L ' + d.target.x + ' ' + d.target.y;
});
linkLabels.attr('transform', function (d) {
if (d.target.x < d.source.x) {
var bbox = this.getBBox();
rx = bbox.x + bbox.width / 2;
ry = bbox.y + bbox.height / 2;
return 'rotate(180 ' + rx + ' ' + ry + ')';
}
else {
return 'rotate(0)';
}
});
}
function dragStarted(event, d) {
if (!event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(event, d) {
d.fx = event.x;
d.fy = event.y;
}
function dragEnded(event, d) {
if (!event.active) simulation.alphaTarget(0);
d.fx = undefined;
d.fy = undefined;
}
</script>
</body>
</html>