我使用d3.js. 誰能指導我如何改變孩子的顏色？比如相對論物理學或現代物理學？我不知道如何選擇一個孩子并改變顏色。謝謝
代碼鏈接：
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您可以根據 更改節點的顏色，text并且可以為需要更改的文本維護顏色模式（如果這是您想要實作的目標）。
var treeData = {
name: " physic ",
children: [
{
name: "Classical Physics ",
children: [
{
name: "Relativistic Physics"
},
{
name: "Quantum Mechanics"
}
]
},
{
name: "Modern Physics"
},
{
name: "Atomic Physics"
}
]
};
var colorSchema = {
"Relativistic Physics": "red",
"Modern Physics": "yellow"
};
// Set the dimensions and margins of the diagram
var margin = { top: 20, right: 120, bottom: 30, left: 120 },
width = 3000 - margin.left - margin.right,
height = 800 - 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
.append("circle")
.attr("class", "node")
.attr("r", 1e-6)
.style("fill", function (d) {
return d._children ? "red" : "yellow";
});
// Add labels for the nodes
nodeEnter
.append("text")
.attr("dy", ".35em")
.attr("x", function (d) {
return d.children || d._children ? -13 : 13;
})
.attr("text-anchor", function (d) {
return d.children || d._children ? "end" : "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 (
colorSchema[d.data.name] || (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);
});
// 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);
}
}.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
font-weight: bold;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
.color {
color: #ff0000;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.min.js"></script>您始終可以在colorSchema.
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<meta charset="UTF-8">
<style>
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
font-weight: bold;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
.color {
color: #FF0000 ;
}
</style>
<!-- load the d3.js library -->
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var treeData =
{
"name": " physic ",
"level":"red",
"children": [
{
"name": "Classical Physics ",
"level":"green",
"children" : [
{
"name" : "Relativistic Physics",
},
{
"name" : "Quantum Mechanics",
},
]
},
{
"name": "Modern Physics",
},
{
"name": "Atomic Physics",
},
]}
// Set the dimensions and margins of the diagram
var margin = {top: 20, right: 120, bottom: 30, left: 120},
width = 3000 - margin.left - margin.right,
height = 800 - 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.append('circle')
.attr('class', 'node')
.attr('r', 1e-6)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
// Add labels for the nodes
nodeEnter.append('text')
.attr("dy", ".35em")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "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", d => d.data.level)
.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)
});
// 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>轉載請註明出處，本文鏈接：https://www.uj5u.com/net/462633.html
標籤：javascript html css d3.js