D3.js在节点上编号的树 [英] D3.js Tree with Numbering on Nodes
本文介绍了D3.js在节点上编号的树的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<script data-require="d3@4.0.0" data-semver="4.0.0" src="https://d3js.org/d3.v4.min.js"></script>
<style>
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node rect {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
.arrow {
fill: none;
stroke: #ccc;
stroke-width: 1px;
}
</style>
</head>
<body>
<script>
var treeData = {
"name": "File 1",
"children": [{
"name": "File 2",
"children": [
{
"name": "File 3",
"children": [{
"name": "File 4",
"type": "data"
}]
},
{
"name": "File 5",
"children": [{
"name": "File 6",
"type": "data",
"children": [
{
"name": "File 7"
},
{
"name": "File 8",
"type": "data"
}
]
}]
}
],
}]
};
// Set the dimensions and margins of the diagram
var margin = {top: 20, right: 90, bottom: 30, left: 90},
width = 5000 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// append the svg object to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate("
+ margin.left + "," + margin.top + ")");
var i = 0,
duration = 750,
root;
// declares a tree layout and assigns the size
var treemap = d3.tree().size([height, width]);
// Assigns parent, children, height, depth
root = d3.hierarchy(treeData, function(d) { return d.children; });
root.x0 = height / 2;
root.y0 = 0;
// Collapse after the second level
root.children.forEach(collapse);
update(root);
// Collapse the node and all it's children
function collapse(d) {
if(d.children) {
d._children = d.children
d._children.forEach(collapse)
d.children = null
}
}
function update(source) {
// Assigns the x and y position for the nodes
var treeData = treemap(root);
// Compute the new tree layout.
var nodes = treeData.descendants(),
links = treeData.descendants().slice(1);
// Normalize for fixed-depth.
nodes.forEach(function(d){ d.y = d.depth * 180});
// ****************** Nodes section ***************************
// Update the nodes...
var node = svg.selectAll('g.node')
.data(nodes, function(d) {return d.id || (d.id = ++i); });
// Enter any new modes at the parent's previous position.
var nodeEnter = node.enter().append('g')
.attr('class', 'node')
.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on('click', click);
// Add Circle for the nodes
nodeEnter.filter(function(d){
return (!d.data.type || d.data.type !== 'data');
}).append('circle')
.attr('class', 'node')
.attr('r', 1e-6)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeEnter.filter(function(d){
return (d.data.type && d.data.type === 'data');
}).append('rect')
.attr('class', 'node')
.attr('width', 20)
.attr('height', 20)
.attr('y', -10)
.attr('x', -10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
// Add labels for the nodes
nodeEnter.append('text')
.attr("dy", "2em")
.attr("x", function(d) {
return d.children || d._children ? 13 : 13;
})
.attr("text-anchor", function(d) {
return d.children || d._children ? "start" : "start";
})
.text(function(d) {
return d.data.name;
});
// UPDATE
var nodeUpdate = nodeEnter.merge(node);
// Transition to the proper position for the node
nodeUpdate.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
// Update the node attributes and style
nodeUpdate.select('circle.node')
.attr('r', 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
})
.attr('cursor', 'pointer');
// Remove any exiting nodes
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
// On exit reduce the node circles size to 0
nodeExit.select('circle')
.attr('r', 1e-6);
// On exit reduce the opacity of text labels
nodeExit.select('text')
.style('fill-opacity', 1e-6);
// ****************** links section ***************************
// Update the links...
var link = svg.selectAll('path.link')
.data(links, function(d) { return d.id; });
// Enter any new links at the parent's previous position.
var linkEnter = link.enter().insert('path', "g")
.attr("class", "link")
.attr('d', function(d){
var o = {x: source.x0, y: source.y0}
return diagonal(o, o)
});
svg.append("text")
.attr("id", "curve-text")
.append("textPath")
.attr("xlink:href", "#link")
.data(treeData, function(d, i){return i;})
// UPDATE
var linkUpdate = linkEnter.merge(link);
// Transition back to the parent element position
linkUpdate.transition()
.duration(duration)
.attr('d', function(d){ return diagonal(d, d.parent) });
// Remove any exiting links
var linkExit = link.exit().transition()
.duration(duration)
.attr('d', function(d) {
var o = {x: source.x, y: source.y}
return diagonal(o, o)
})
.remove();
// Store the old positions for transition.
nodes.forEach(function(d){
d.x0 = d.x;
d.y0 = d.y;
});
// Creates a curved (diagonal) path from parent to the child nodes
function diagonal(s, d) {
path = `M ${s.y} ${s.x}
C ${(s.y + d.y) / 2} ${s.x},
${(s.y + d.y) / 2} ${d.x},
${d.y} ${d.x}`
return path
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
}
</script>
</body>
所需产品:
对于每个在其右边具有多条路径的节点，顶部路径应具有1，随着您的下降，该路径将增大，如上图所示.我已经看过 https://gist.github.com/mbostock/2565344 和在d3 arc javascript中绘制文本，但无法将数字添加到图.
For each node which has multiple paths to the right of it, the top path should have a 1, increasing as you're going down, as in the image above. I have already seen https://gist.github.com/mbostock/2565344 and draw text in d3 arc javascript, but have not been able to add the numbers to the diagram.
我知道您可能应该使用.append('text')，但是我不确定如何将其附加"到路径上，也不知道在这种情况下如何适当地设置属性和文本值.任何对此的答案都应该是可扩展的-即，不要以为只有两条路径.
I get that you're probably supposed to use .append('text'), but I'm not sure how to "append" this to the paths, nor do I know how to appropriately set the properties and the text value in this case. Any answer to this should be scalable - i.e., do not assume that there are only two paths.
推荐答案
另一个有趣的问题.我会这样
Another fun question. I'd do it like this.
首先，将linkEnter更改为附加g，并在此g中附加path和text.
First, change the linkEnter to append a g and into this g append the path and text.
// Enter any new links at the parent's previous position.
var linkEnter = link.enter().insert('g', 'g')
.attr("class", "link");
linkEnter.append('path')
.attr('d', function(d) {
var o = {
x: source.x0,
y: source.y0
}
return diagonal(o, o)
});
linkEnter.append('text')
...
第二，要计算计数，以下是一个棘手的小函数，它基于父母的孩子的身长以及您在链接的迭代中的位置:
Second, To calculate the count, here's a tricky little function based off the parent's children's length and where you are in the iteration of the links:
.text(function(d,i) {
if (d.parent && d.parent.children.length > 1){
if (!d.parent.index) d.parent.index = 0;
return ++d.parent.index;
}
})
最后，对于该职位，我不会纠缠于textPath，这有点过头了.只需计算链接的中点即可.
Finally, for the position, I wouldn't mess around with a textPath, it's a bit overkill. Just calculate the midpoint of the link.
.attr('transform', function(d){
if (d.parent) {
return 'translate(' + ((d.parent.y + d.y) / 2) + ',' + ((d.parent.x + d.x) / 2) + ')'
}
})
将它们放在一起:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<script data-require="d3@4.0.0" data-semver="4.0.0" src="https://d3js.org/d3.v4.min.js"></script>
<style>
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node rect {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link path {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
.link text {
font: 12px sans-serif;
}
.arrow {
fill: none;
stroke: #ccc;
stroke-width: 1px;
}
</style>
</head>
<body>
<script>
var treeData = {
"name": "File 1",
"children": [{
"name": "File 2",
"children": [{
"name": "File 3",
"children": [{
"name": "File 4",
"type": "data"
}]
}, {
"name": "File 5",
"children": [{
"name": "File 6",
"type": "data",
"children": [{
"name": "File 7"
}, {
"name": "File 8",
"type": "data"
}]
}]
}],
}]
};
// Set the dimensions and margins of the diagram
var margin = {
top: 20,
right: 90,
bottom: 30,
left: 90
},
width = 5000 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// append the svg object to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var i = 0,
duration = 750,
root;
// declares a tree layout and assigns the size
var treemap = d3.tree().size([height, width]);
// Assigns parent, children, height, depth
root = d3.hierarchy(treeData, function(d) {
return d.children;
});
root.x0 = height / 2;
root.y0 = 0;
// Collapse after the second level
root.children.forEach(collapse);
update(root);
// Collapse the node and all it's children
function collapse(d) {
if (d.children) {
d._children = d.children
d._children.forEach(collapse)
d.children = null
}
}
function update(source) {
// Assigns the x and y position for the nodes
var treeData = treemap(root);
// Compute the new tree layout.
var nodes = treeData.descendants(),
links = treeData.descendants().slice(1);
// Normalize for fixed-depth.
nodes.forEach(function(d) {
d.y = d.depth * 180
});
// ****************** Nodes section ***************************
// Update the nodes...
var node = svg.selectAll('g.node')
.data(nodes, function(d) {
return d.id || (d.id = ++i);
});
// Enter any new modes at the parent's previous position.
var nodeEnter = node.enter().append('g')
.attr('class', 'node')
.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on('click', click);
// Add Circle for the nodes
nodeEnter.filter(function(d) {
return (!d.data.type || d.data.type !== 'data');
}).append('circle')
.attr('class', 'node')
.attr('r', 1e-6)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeEnter.filter(function(d) {
return (d.data.type && d.data.type === 'data');
}).append('rect')
.attr('class', 'node')
.attr('width', 20)
.attr('height', 20)
.attr('y', -10)
.attr('x', -10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
// Add labels for the nodes
nodeEnter.append('text')
.attr("dy", "2em")
.attr("x", function(d) {
return d.children || d._children ? 13 : 13;
})
.attr("text-anchor", function(d) {
return d.children || d._children ? "start" : "start";
})
.text(function(d) {
return d.data.name;
});
// UPDATE
var nodeUpdate = nodeEnter.merge(node);
// Transition to the proper position for the node
nodeUpdate.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
// Update the node attributes and style
nodeUpdate.select('circle.node')
.attr('r', 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
})
.attr('cursor', 'pointer');
// Remove any exiting nodes
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
// On exit reduce the node circles size to 0
nodeExit.select('circle')
.attr('r', 1e-6);
// On exit reduce the opacity of text labels
nodeExit.select('text')
.style('fill-opacity', 1e-6);
// ****************** links section ***************************
// Update the links...
var link = svg.selectAll('g.link')
.data(links, function(d) {
return d.id;
});
// Enter any new links at the parent's previous position.
var linkEnter = link.enter().insert('g', 'g')
.attr("class", "link");
linkEnter.append('path')
.attr('d', function(d) {
var o = {
x: source.x0,
y: source.y0
}
return diagonal(o, o)
});
linkEnter.append('text')
.text(function(d,i) {
if (d.parent && d.parent.children.length > 1){
if (!d.parent.index) d.parent.index = 0;
return ++d.parent.index;
}
})
.attr('dy', "-1em");
// UPDATE
var linkUpdate = linkEnter.merge(link);
// Transition back to the parent element position
linkUpdate.select('path').transition()
.duration(duration)
.attr('d', function(d) {
return diagonal(d, d.parent)
});
linkUpdate.select('text').transition()
.duration(duration)
.attr('transform', function(d){
if (d.parent) {
return 'translate(' + ((d.parent.y + d.y) / 2) + ',' + ((d.parent.x + d.x) / 2) + ')'
}
})
// Remove any exiting links
link.exit().each(function(d){
d.parent.index = 0;
})
var linkExit = link.exit()
.transition()
.duration(duration);
linkExit.select('path')
.attr('d', function(d) {
var o = {
x: source.x,
y: source.y
}
return diagonal(o, o)
})
linkExit.select('text')
.style('opacity', 0);
linkExit.remove();
// Store the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
// Creates a curved (diagonal) path from parent to the child nodes
function diagonal(s, d) {
path = `M ${s.y} ${s.x}
C ${(s.y + d.y) / 2} ${s.x},
${(s.y + d.y) / 2} ${d.x},
${d.y} ${d.x}`
return path
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
}
</script>
</body>
这篇关于D3.js在节点上编号的树的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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