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javascript - 编辑 "radial"图表中 D3 SVG 的链接位置

转载 作者:行者123 更新时间:2023-11-29 16:34:41 31 4
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我遇到了一个没有成功解决的问题,在这种情况下,我想从矩形的中间开始移动链接,将它们放在最末端,以便 PUB-2 和 PUB-3不要互相交叉。如果可能的话,展开第一层并默认关闭另一层。

有什么想法吗?这是源代码https://bl.ocks.org/mbostock/4339083 (d3 网站)和工作代码笔( https://codepen.io/andrea06590/pen/mzJmpE ),其中我使用以下代码+第 126 行的链接间距将原始圆形更改为矩形:

  nodeEnter.append("rect")
.attr("width", 75)
.attr("height", 20)
.attr("x", -10)
.attr("y", -10)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "red"; });

D3 Tree Chart

最佳答案

修复链接的方法如下:

首先,更改矩形位置,使它们位于标准链接节点图中圆圈所在位置的中心。我没有在 update 函数中硬编码值,而是在对象中配置了矩形尺寸:

var rect = {l: 60, w: 20};

编辑矩形属性以使用 rect 中的值,并通过将 xy 值偏移来使矩形在节点上居中分别是矩形长度和宽度的一半。

nodeEnter.append("rect")
.attr("width", rect.l) // long dimension
.attr("height", rect.w) // short dimension
.attr("x", -rect.l/2) // offset by half the long dimension
.attr("y", -rect.w/2) // offset by half the short dimension
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "red";
});

要修复链接,我们需要将其开始和结束位置更改相同的偏移量。由于退出和进入链接都使用源节点的位置,因此我们唯一需要担心的链接是更新选择:

link.transition()
.duration(duration)
.attr("d", diagonal);

diagonal 采用以下形式的对象

{ source: { x: 123, y: 456 }, target: { x: 234, y: 567 } }

在更新选择的情况下,数据项已在此配置中,因此调用 diagonal(d) 可以正常工作。由于我们要更改坐标以包含矩形的偏移量,因此我们必须中断对 Angular 线调用。请注意,投影会切换 xy 坐标,因此我们必须更改 y 值:

  link.transition()
.duration(duration)
.attr("d", function(d){
return diagonal({
source: {x: d.source.x, y: d.source.y + rect.l/2}, // add half the rectangle length
target: {x: d.target.x, y: d.target.y - rect.l/2} // minus half the rectangle length
})
});

我还通过删除您添加的偏移并将文本 anchor 设置为“中间”,将文本在矩形中居中。

结果如下:

var pubs =
{
"name": "AUT-1",
"children": [
{
"name": "PUB-1","children": [
{"name": "AUT-11","children": [
{"name": "AFF-111"},
{"name": "AFF-112"}
]},
{"name": "AUT-12","children": [
{"name": "AFF-121"}
]},
{"name": "AUT-13","children": [
{"name": "AFF-131"},
{"name": "AFF-132"}
]},
{"name": "AUT-14","children": [
{"name": "AFF-141"}
]}
]
},
{
"name": "PUB-2","children": [
{"name": "AUT-21"},
{"name": "AUT-22"},
{"name": "AUT-23"},
{"name": "AUT-24"},
{"name": "AUT-25"},
{"name": "AUT-26"},
{"name": "AUT-27"},
{"name": "AUT-28","children":[
{"name": "AFF-281"},
{"name": "AFF-282"},
{"name": "AFF-283"},
{"name": "AFF-284"},
{"name": "AFF-285"},
{"name": "AFF-286"}
]}
]
},
{"name": "PUB-3"},
{
"name": "PUB-4","children": [
{"name": "AUT-41"},
{"name": "AUT-42"},
{"name": "AUT-43","children": [
{"name": "AFF-431"},
{"name": "AFF-432"},
{"name": "AFF-433"},
{"name": "AFF-434","children":[
{"name": "ADD-4341"},
{"name": "ADD-4342"},
]}
]},
{"name": "AUT-44"}
]
},
{
"name": "PUB-5","children": [
{"name": "AUT-51","children":[
{"name": "AFF-511"},
{"name": "AFF-512"},
{"name": "AFF-513"},
{"name": "AFF-514"},
{"name": "AFF-515"},
{"name": "AFF-516"}
]},
{"name": "AUT-52"},
{"name": "AUT-53"},
{"name": "AUT-54"},
{"name": "AUT-55","children":[
{"name": "AFF-551"},
{"name": "AFF-552"},
{"name": "AFF-553"},
{"name": "AFF-554"}
]},
{"name": "AUT-56"},
{"name": "AUT-57"},
{"name": "AUT-58"},
{"name": "AUT-59"},
{"name": "AUT-591"},
{"name": "AUT-592"},
{"name": "AUT-593"},
{"name": "AUT-594"},
{"name": "AUT-595"},
{"name": "AUT-596"}
]
},
{
"name": "PUB-6","children": [
{"name": "AUT-61","children":[
{"name": "AFF-611"},
{"name": "AFF-612"},
{"name": "AFF-613"},
{"name": "AFF-614","children":[
{"name": "ADD-6141"},
{"name": "ADD-6142"},
]}
]},
{"name": "AUT-62"},
{"name": "AUT-63"},
{"name": "AUT-64"},
{"name": "AUT-65"},
{"name": "AUT-66"},
{"name": "AUT-67"},
{"name": "AUT-68"},
{"name": "AUT-69"}
]
}
]
};

var diameter = 800;

var margin = {top: 20, right: 120, bottom: 20, left: 120},
width = diameter,
height = diameter;

var i = 0,
duration = 350,
root;

var tree = d3.layout.tree()
.size([360, diameter / 2 - 80])
.separation(function(a, b) { return (a.parent == b.parent ? 1 : 1) / a.depth; });

var diagonal = d3.svg.diagonal.radial()
.projection(function(d) { return [d.y, d.x / 180 * Math.PI]; });

var svg = d3.select("body").append("svg")
.attr("width", width )
.attr("height", height )
.append("g")
.attr("transform", "translate(" + diameter / 2 + "," + diameter / 2 + ")");

var rect = {l: 60, w: 20}

root = pubs;
root.x0 = height / 2;
root.y0 = 0;

update(root);

d3.select(self.frameElement).style("height", "800px");

function update(source) {

// Compute the new tree layout.
var nodes = tree.nodes(root),
links = tree.links(nodes),
offset = nodes[0].x

// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });

// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.on("click", click);

nodeEnter.append("rect")
.attr("width", rect.l)
.attr("height", rect.w)
.attr("x", -rect.l/2)
.attr("y", -rect.w/2)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "red";
});

nodeEnter.append("text")
.attr("x", 0)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
//.attr("transform", function(d) { return d.x < 180 ? "translate(0)" : "rotate(180)translate(-" + (d.name.length * 8.5) + ")"; })
.text(function(d) { return d.name; })
.style("fill-opacity", 1e-6);

// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + d.y + ")"; })

// nodeUpdate.select("circle")
// .attr("r", 4.5)
// .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

nodeUpdate.select("text")
.style("fill-opacity", 1)
.attr("transform", function(d) { return d.x < 180 ? "translate(0)" : "rotate(180)"; });

// TODO: appropriate transform
var nodeExit = node.exit().transition()
.duration(duration)
//.attr("transform", function(d) { return "diagonal(" + source.y + "," + source.x + ")"; })
.remove();

// nodeExit.select("circle")
// .attr("r", 1e-6);

nodeExit.select("text")
.style("fill-opacity", 1e-6);

// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });

// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});

// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", function(d){
return diagonal({
source: {x: d.source.x, y: d.source.y+rect.l/2},
target: {x: d.target.x, y: d.target.y-rect.l/2}
})
});

// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();

// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}

// 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);
}

// Collapse nodes
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
.node {
cursor: pointer;
}

.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}

.node text {
font: 10px sans-serif;
}

.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
<script type="text/javascript" src="//d3js.org/d3.v3.min.js"></script>

我认为直线在这个可视化中看起来更好 - 例如:

var pubs =
{
"name": "AUT-1",
"children": [
{
"name": "PUB-1","children": [
{"name": "AUT-11","children": [
{"name": "AFF-111"},
{"name": "AFF-112"}
]},
{"name": "AUT-12","children": [
{"name": "AFF-121"}
]},
{"name": "AUT-13","children": [
{"name": "AFF-131"},
{"name": "AFF-132"}
]},
{"name": "AUT-14","children": [
{"name": "AFF-141"}
]}
]
},
{
"name": "PUB-2","children": [
{"name": "AUT-21"},
{"name": "AUT-22"},
{"name": "AUT-23"},
{"name": "AUT-24"},
{"name": "AUT-25"},
{"name": "AUT-26"},
{"name": "AUT-27"},
{"name": "AUT-28","children":[
{"name": "AFF-281"},
{"name": "AFF-282"},
{"name": "AFF-283"},
{"name": "AFF-284"},
{"name": "AFF-285"},
{"name": "AFF-286"}
]}
]
},
{"name": "PUB-3"},
{
"name": "PUB-4","children": [
{"name": "AUT-41"},
{"name": "AUT-42"},
{"name": "AUT-43","children": [
{"name": "AFF-431"},
{"name": "AFF-432"},
{"name": "AFF-433"},
{"name": "AFF-434","children":[
{"name": "ADD-4341"},
{"name": "ADD-4342"},
]}
]},
{"name": "AUT-44"}
]
},
{
"name": "PUB-5","children": [
{"name": "AUT-51","children":[
{"name": "AFF-511"},
{"name": "AFF-512"},
{"name": "AFF-513"},
{"name": "AFF-514"},
{"name": "AFF-515"},
{"name": "AFF-516"}
]},
{"name": "AUT-52"},
{"name": "AUT-53"},
{"name": "AUT-54"},
{"name": "AUT-55","children":[
{"name": "AFF-551"},
{"name": "AFF-552"},
{"name": "AFF-553"},
{"name": "AFF-554"}
]},
{"name": "AUT-56"},
{"name": "AUT-57"},
{"name": "AUT-58"},
{"name": "AUT-59"},
{"name": "AUT-591"},
{"name": "AUT-592"},
{"name": "AUT-593"},
{"name": "AUT-594"},
{"name": "AUT-595"},
{"name": "AUT-596"}
]
},
{
"name": "PUB-6","children": [
{"name": "AUT-61","children":[
{"name": "AFF-611"},
{"name": "AFF-612"},
{"name": "AFF-613"},
{"name": "AFF-614","children":[
{"name": "ADD-6141"},
{"name": "ADD-6142"},
]}
]},
{"name": "AUT-62"},
{"name": "AUT-63"},
{"name": "AUT-64"},
{"name": "AUT-65"},
{"name": "AUT-66"},
{"name": "AUT-67"},
{"name": "AUT-68"},
{"name": "AUT-69"}
]
}
]
};

var diameter = 800;

var margin = {top: 20, right: 120, bottom: 20, left: 120},
width = diameter,
height = diameter;

var i = 0,
duration = 350,
root;

var tree = d3.layout.tree()
.size([360, diameter / 2 - 80])
.separation(function(a, b) { return (a.parent == b.parent ? 1 : 1) / a.depth; });


var diagonal_extras = {
path: {
// diagonal line
direct: function(p){
return [ p.source, p.target ];
}

// this is also the default path in radial trees
, l_shape: function(p){
return [ p.source, { x: p.target.x, y: p.source.y }, p.target ];
}

, l_shape_2: function(p){
return [ p.source, { x: p.source.x, y: p.target.y }, p.target ];
}

, dogleg: function(p){
return [ p.source,
{ x: p.source.x,
y: (p.source.y + p.target.y) / 2
},
{ x: (p.source.x + p.target.x) / 2,
y: (p.source.y + p.target.y) / 2
},
{ x: p.target.x,
y: (p.source.y + p.target.y) / 2
}, p.target];
}

, dogleg_2: function(p){
return [ p.source,
{ x: (p.source.x + p.target.x) / 2,
y: p.source.y
},
{ x: (p.source.x + p.target.x) / 2,
y: (p.source.y + p.target.y) / 2
},
{ x: (p.source.x + p.target.x) / 2,
y: p.target.y
}, p.target];
}

}

, polar_obj_to_cart: function(pt){
var angle = pt.x / 180 * Math.PI;
return [pt.y * Math.cos(angle), pt.y * Math.sin(angle)];
}

, polar_coords_to_cart: function(xy){
var angle = xy[0] / 180 * Math.PI;
return [ xy[1] * Math.cos(angle), xy[1] * Math.sin(angle)];
}

}

diagonal_extras.right_angle = function() {

var projection = d3.svg.diagonal().projection()
, path_type = 'dogleg'
;

function diagonal(d) {
return diagonal.path_maker( diagonal_extras.path[ diagonal.path_type() ](d) );
}

diagonal.path_maker = function( pathData ) {
return "M" + pathData.map( projection ).join(' ');
};

diagonal.valid_path_types = function() {
return Object.keys( diagonal_extras.path );
};

diagonal.path_type = function(x) {
if (! arguments.length) { return path_type; }
if ( diagonal_extras.path[ x ] ) {
path_type = x;
return diagonal;
}
throw new Error( x + ' is not a valid path type' );
};

diagonal.projection = function(x) {
if (!arguments.length) { return projection; }
projection = x;
return diagonal;
};

diagonal.path = function(x) {
if (!arguments.length) { return path; }
path = x;
return diagonal;
};

diagonal.draw = function(d) {
return diagonal(d);
};

return diagonal;
}
diagonal_extras.radial = function() {
var diagonal = diagonal_extras.right_angle()
, projection = function(pt){
return [ pt.x, pt.y ];
};

diagonal.path_type('direct');

diagonal.projection = function(x) {
if (!arguments.length) { return projection; }
projection = x;
return diagonal;
};

diagonal.path_maker = function( pathData ) {

var projected = pathData.map( function(x){ return projection(x); })
, pl = projected.length
, points
, prev_angle
;

// direct link:
if ( 2 === pl ) {
return 'M' + projected.map( function(x){ return diagonal_extras.polar_coords_to_cart(x); }).join(' ');
}

points = projected.map( function(obj){
return { angle: obj[0] / 180 * Math.PI, radius: obj[1] };
});

return "M" + points.map( function(pt){
var str = '';
if ( prev_angle ) {
if ( prev_angle === pt.angle ) {
// draw a straight line
str = 'L';
}
else {
// draw an arc to the new radius and angle
str = 'A' + pt.radius + ',' + pt.radius
// x axis rotation
+ " 0 "
// large arc flag
+ " 0,"
// sweep
+ ( pt.angle > prev_angle ? 1 : 0) + " ";

}
}
prev_angle = pt.angle;
return str + pt.radius * Math.cos(pt.angle) + "," + pt.radius * Math.sin(pt.angle);

}).join(' ');

};
return diagonal;
}

var diagonal = diagonal_extras.radial()
.path_type('dogleg')
.projection(function(d){ return [ d.x - 90, d.y ]; });

var svg = d3.select("body").append("svg")
.attr("width", width )
.attr("height", height )
.append("g")
.attr("transform", "translate(" + diameter / 2 + "," + diameter / 2 + ")rotate(90)"); // note the altered rotation

var rect = {l: 60, w: 20}

root = pubs;
root.x0 = height / 2;
root.y0 = 0;

//root.children.forEach(collapse); // start with all children collapsed
update(root);

d3.select(self.frameElement).style("height", "800px");

function update(source) {

// Compute the new tree layout.
var nodes = tree.nodes(root),
links = tree.links(nodes),
offset = nodes[0].x

// Normalise angles so that the root is horizontal
nodes.forEach(function(d) {
d.x -= offset;
if (d.x < 180) { d.x += 360 }
});

// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });

// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.on("click", click);

nodeEnter.append("rect")
.attr("width", rect.l)
.attr("height", rect.w)
.attr("x", -rect.l/2)
.attr("y", -rect.w/2)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "red";
});

nodeEnter.append("text")
.attr("x", 0)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.text(function(d) { return d.name; })
.style("fill-opacity", 1e-6);

// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + d.y + ")"; })

nodeUpdate.select("text")
.style("fill-opacity", 1)
.attr("transform", function(d) {
return ( d.x < 270 || d.x > 450 )
? 'rotate(180)'
: ''
});

// TODO: appropriate transform
var nodeExit = node.exit().transition()
.duration(duration)
//.attr("transform", function(d) { return "diagonal(" + source.y + "," + source.x + ")"; })
.remove();

nodeExit.select("text")
.style("fill-opacity", 1e-6);

// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });

// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});

// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", function(d){
return diagonal({
source: {x: d.source.x, y: d.source.y+rect.l/2},
target: {x: d.target.x, y: d.target.y-rect.l/2}
})
});

// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();

// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}

// 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);
}

// Collapse nodes
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
.node {
cursor: pointer;
}

.node text {
font: 10px sans-serif;
}

.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
<script type="text/javascript" src="//d3js.org/d3.v3.min.js"></script>

关于javascript - 编辑 "radial"图表中 D3 SVG 的链接位置,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52556894/

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