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d3.js - 将 D3 v3 强制有向图转换为 D3 v4 库实现时遇到问题?

转载 作者:行者123 更新时间:2023-12-04 18:32:30 25 4
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我最近使用 v3 库创建了我的第一个强制有向图,但是现在我需要使用 D3 版本 4 库创建相同的图,但是 v4 中的方法发生了巨大变化,现在我完全出错了()/drag() 方法 3 现在在 v4 中不存在。

我的图表基于以下模型 - http://www.ourd3js.com/wordpress/?p=606

是否有在 d3 的 v4 库中创建的示例存储库,我可以在某个地方查看并学习一些可以替换此特定图表的功能?

编辑:

我当前的代码看起来像这样,但我无法完全转换它,例如,有时节点链接非常接近,链接和节点的文本重叠。

<svg width="960" height="600"></svg>

Javascript代码 :
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");

var graph = root;

var w = window,
d = document,
e = d.documentElement,
g = d.getElementsByTagName('body')[0],
x = w.innerWidth || e.clientWidth || g.clientWidth,
y = w.innerHeight|| e.clientHeight|| g.clientHeight;

var width = x;
var height = y;
var img_w = 24;
var img_h = 24;
var k = Math.sqrt(root.nodes.length / (width * height));

var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) { return d.id; }))
.force("charge", d3.forceManyBody().strength(-5 / k))
.force("center", d3.forceCenter(width / 2, height / 2));

var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line");

var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("image")
.attr("width",img_w)
.attr("height",img_h)
.attr("xlink:href",function(d){
return d.image;
})
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));

var links_text = svg.selectAll(".linetext")
.data(graph.links)
.enter()
.append("text")
.attr("class","linetext slds-text-heading--small")
.attr("text-anchor", "middle")
.text(function(d){
return '['+d.relation+']';
});

var nodes_text = svg.selectAll(".nodetext")
.data(graph.nodes)
.enter()
.append("text")
.attr("class","nodetext slds-text-heading--label")
.attr("text-anchor", "middle")
.attr("dx",-20)
.attr("dy",20)
.text(function(d){
return (d.subname!=''?(d.subname+': '):'')+d.name;
});

simulation
.nodes(graph.nodes)
.on("tick", ticked);

simulation.force("link")
.links(graph.links);

function ticked() {
link
.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; });

links_text
.attr("x",function(d){ return (d.source.x + d.target.x) / 2; })
.attr("y",function(d){ return (d.source.y + d.target.y) / 2; });

node
.attr("x", function(d) { return d.x; })
.attr("y", function(d) { return d.y; });

nodes_text
.attr("x",function(d){ return d.x + 20 })
.attr("y",function(d){ return d.y + img_w/2; });
}


function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}

function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}

function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}

JSON 数据字符串:
  var root = {
"nodes" : [ {
"subname" : "",
"name" : "Telco Power Case",
"image" : "/node32.png",
"id" : 0
}, {
"subname" : "Contact",
"name" : "Suman Kumar",
"image" : "/subnode32.png.png",
"id" : 1
}, {
"subname" : "Contact",
"name" : "Karla Samuel",
"image" : "/subnode32.png.png",
"id" : 2
}, {
"subname" : "Account",
"name" : "Signa Tech",
"image" : "/subnode32.png.png",
"id" : 3
}, {
"subname" : "",
"name" : "Maven's Case",
"image" : "/node32.png",
"id" : 4
}, {
"subname" : "",
"name" : "Delta Case",
"image" : "/node32.png",
"id" : 5
}, {
"subname" : "Contact",
"name" : "T Browney",
"image" : "/subnode32.png.png",
"id" : 6
}, {
"subname" : "Account",
"name" : "Presto",
"image" : "/subnode32.png.png",
"id" : 7
}, {
"subname" : "Contact",
"name" : "Bob Tannenbaum",
"image" : "/subnode32.png.png",
"id" : 8
}, {
"subname" : "Account",
"name" : "Tesla Power",
"image" : "/subnode32.png.png",
"id" : 9
} ],
"links" : [ {
"target" : 1,
"source" : 0,
"relation" : "Trainee"
}, {
"target" : 2,
"source" : 0,
"relation" : "Manager"
}, {
"target" : 3,
"source" : 0,
"relation" : "Technology"
}, {
"target" : 1,
"source" : 0,
"relation" : "Trainee"
}, {
"target" : 2,
"source" : 0,
"relation" : "Manager"
}, {
"target" : 3,
"source" : 0,
"relation" : "Technology"
}, {
"target" : 2,
"source" : 4,
"relation" : "Expert"
}, {
"target" : 2,
"source" : 5,
"relation" : "Expert"
}, {
"target" : 1,
"source" : 5,
"relation" : "Expert"
}, {
"target" : 6,
"source" : 5,
"relation" : "Trainee"
}, {
"target" : 7,
"source" : 5,
"relation" : "Technology;New Firm"
}, {
"target" : 8,
"source" : 4,
"relation" : "Expert"
}, {
"target" : 9,
"source" : 4,
"relation" : "New Firm"
}, {
"target" : 8,
"source" : 4,
"relation" : "Expert"
}, {
"target" : 9,
"source" : 4,
"relation" : "New Firm"
}, {
"target" : 6,
"source" : 5,
"relation" : "Trainee"
}, {
"target" : 7,
"source" : 5,
"relation" : "Technology;New Firm"
} ]
};

最佳答案

你一下子问了一连串的问题,所以让我们对这个问题有点理智。

首先,linkDistance 现在是 distance在 d3.forceLink 上,因此在您的代码中:

.force("link", d3.forceLink().id(function(d) { return d.id; }).distance(200))

其次,要使图像居中,请在设置 x 位置时执行此操作:
node
.attr("x", function(d) {
return (d.x - img_w /2);
});

第三,要进行边界检测,您需要自己实现。例如,修复节点位置将是(建立在最后一个代码片段上):
node
.attr("x", function(d) {
var xPos = (d.x - img_w /2);
if (xPos < 0) return 0;
if (xPos > (960 - img_w)) return (960 - img_w);
return xPos;
})
.attr("y", function(d) {
var yPos = d.y;
if (yPos < 0) return 0;
if (yPos > (600 - img_h)) return (600 - img_h);
return yPos;
});

现在将相同的方法应用于链接...

这是我开始实现一些修复的一些示例代码:

<!DOCTYPE html>
<html>

<head>
<script data-require="d3@4.0.0" data-semver="4.0.0" src="https://d3js.org/d3.v4.min.js"></script>
<style>
.links line {
stroke: #aaa;
}

.nodes circle {
pointer-events: all;
stroke: none;
stroke-width: 40px;
}
</style>
</head>

<body>
<svg width="960" height="600"></svg>
<script>
var root = {
"nodes": [{
"subname": "",
"name": "Telco Power Case",
"image": "http://lorempixel.com/24/24/",
"id": 0
}, {
"subname": "Contact",
"name": "Suman Kumar",
"image": "http://lorempixel.com/24/24/",
"id": 1
}, {
"subname": "Contact",
"name": "Karla Samuel",
"image": "http://lorempixel.com/24/24/",
"id": 2
}, {
"subname": "Account",
"name": "Signa Tech",
"image": "http://lorempixel.com/24/24/",
"id": 3
}, {
"subname": "",
"name": "Maven's Case",
"image": "http://lorempixel.com/24/24/",
"id": 4
}, {
"subname": "",
"name": "Delta Case",
"image": "http://lorempixel.com/24/24/",
"id": 5
}, {
"subname": "Contact",
"name": "T Browney",
"image": "http://lorempixel.com/24/24/",
"id": 6
}, {
"subname": "Account",
"name": "Presto",
"image": "http://lorempixel.com/24/24/",
"id": 7
}, {
"subname": "Contact",
"name": "Bob Tannenbaum",
"image": "http://lorempixel.com/24/24/",
"id": 8
}, {
"subname": "Account",
"name": "Tesla Power",
"image": "http://lorempixel.com/24/24/",
"id": 9
}],
"links": [{
"target": 1,
"source": 0,
"relation": "Trainee"
}, {
"target": 2,
"source": 0,
"relation": "Manager"
}, {
"target": 3,
"source": 0,
"relation": "Technology"
}, {
"target": 1,
"source": 0,
"relation": "Trainee"
}, {
"target": 2,
"source": 0,
"relation": "Manager"
}, {
"target": 3,
"source": 0,
"relation": "Technology"
}, {
"target": 2,
"source": 4,
"relation": "Expert"
}, {
"target": 2,
"source": 5,
"relation": "Expert"
}, {
"target": 1,
"source": 5,
"relation": "Expert"
}, {
"target": 6,
"source": 5,
"relation": "Trainee"
}, {
"target": 7,
"source": 5,
"relation": "Technology;New Firm"
}, {
"target": 8,
"source": 4,
"relation": "Expert"
}, {
"target": 9,
"source": 4,
"relation": "New Firm"
}, {
"target": 8,
"source": 4,
"relation": "Expert"
}, {
"target": 9,
"source": 4,
"relation": "New Firm"
}, {
"target": 6,
"source": 5,
"relation": "Trainee"
}, {
"target": 7,
"source": 5,
"relation": "Technology;New Firm"
}]
};

var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");

var graph = root;

var w = window,
d = document,
e = d.documentElement,
g = d.getElementsByTagName('body')[0],
x = w.innerWidth || e.clientWidth || g.clientWidth,
y = w.innerHeight || e.clientHeight || g.clientHeight;

var realWidth = width;
var width = x;
var height = y;
var img_w = 24;
var img_h = 24;
var k = Math.sqrt(root.nodes.length / (width * height));

var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) {
return d.id;
}).distance(200))
.force("charge", d3.forceManyBody().strength(-5 / k))
.force("center", d3.forceCenter(width / 2, height / 2));

var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line");

var node = svg.append("g")
.attr("class", "nodes")
.selectAll("circle")
.data(graph.nodes)
.enter().append("image")
.attr("width", img_w)
.attr("height", img_h)
.attr("xlink:href", function(d) {
return d.image;
})
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));

var links_text = svg.selectAll(".linetext")
.data(graph.links)
.enter()
.append("text")
.attr("class", "linetext slds-text-heading--small")
.attr("text-anchor", "middle")
.text(function(d) {
return '[' + d.relation + ']';
});

var nodes_text = svg.selectAll(".nodetext")
.data(graph.nodes)
.enter()
.append("text")
.attr("class", "nodetext slds-text-heading--label")
.attr("text-anchor", "middle")
.attr("dx", -20)
.attr("dy", 20)
.text(function(d) {
return (d.subname != '' ? (d.subname + ': ') : '') + d.name;
});

simulation
.nodes(graph.nodes)
.on("tick", ticked);

simulation.force("link")
.links(graph.links);

function ticked() {
link
.attr("x1", function(d) {
var xPos = d.source.x;
if (xPos < 0) return 0;
if (xPos > (960 - img_w)) return (960 - img_w);
return xPos;
})
.attr("y1", function(d) {
var yPos = d.source.y;
if (yPos < 0) return 0;
if (yPos > (600 - img_h)) return (600 - img_h);
return yPos;
})
.attr("x2", function(d) {
var xPos = d.target.x;
if (xPos < 0) return 0;
if (xPos > (960 - img_w)) return (960 - img_w);
return xPos;
})
.attr("y2", function(d) {
var yPos = d.target.y;
if (yPos < 0) return 0;
if (yPos > (600 - img_h)) return (600 - img_h);
return yPos;
});

links_text
.attr("x", function(d) {
var xPos = (d.source.x + d.target.x) / 2;
if (xPos < 0) return 0;
if (xPos > (960 - img_w)) return (960 - img_w);
return xPos;
})
.attr("y", function(d) {
var yPos = (d.source.y + d.target.y) / 2;
if (yPos < 0) return 0;
if (yPos > (600 - img_h)) return (600 - img_h);
return yPos;
});


node
.attr("x", function(d) {
var xPos = (d.x - img_w /2);
if (xPos < 0) return 0;
if (xPos > (960 - img_w)) return (960 - img_w);
return xPos;
})
.attr("y", function(d) {
var yPos = d.y;
if (yPos < 0) return 0;
if (yPos > (600 - img_h)) return (600 - img_h);
return yPos;
});

nodes_text
.attr("x", function(d) {
return d.x + 20
})
.attr("y", function(d) {
return d.y + img_w / 2;
});
}


function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}

function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}

function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
</script>
</body>

</html>

关于d3.js - 将 D3 v3 强制有向图转换为 D3 v4 库实现时遇到问题?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38187076/

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