Zoomable Treemap 學習
遇到的問題:程式碼中的 treemap 根本沒用到啊?所以這是自己硬刻出來的吧?
Zoomable Treemap 學習
遇到的問題:程式碼中的 treemap 根本沒用到啊?所以這是自己硬刻出來的吧?
<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<title>Zoomable Treemaps with Color</title> | |
<style> | |
#chart { | |
width: 960px; | |
height: 500px; | |
} | |
text { | |
pointer-events: none; | |
} | |
.grandparent text { | |
font-weight: bold; | |
} | |
rect { | |
/* fill: none; */ | |
stroke: #fff; | |
stroke-width: 1px; | |
} | |
rect.parent, | |
.grandparent rect { | |
stroke-width: 2px; | |
} | |
.grandparent:hover rect { | |
fill: darkgrey; | |
} | |
.children rect.parent, | |
.grandparent rect { | |
cursor: pointer; | |
} | |
.children rect.child { | |
opacity: 0; | |
} | |
.children rect.parent { | |
} | |
.children:hover rect.child { | |
opacity: 1; | |
stroke-width: 1px; | |
} | |
.children:hover rect.parent { | |
opacity: 0; | |
} | |
</style> | |
<div id="chart"></div> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script> | |
var margin = {top: 30, right: 0, bottom: 20, left: 0}, | |
width = 960, | |
height = 500 - margin.top - margin.bottom, | |
formatNumber = d3.format(",%"), | |
colorDomain = [-.6, 0, .6], | |
colorRange = ["#373a93", 'white', "#936638"], | |
transitioning; | |
// sets x and y scale to determine size of visible boxes | |
var x = d3.scale.linear() | |
.domain([0, width]) | |
.range([0, width]); | |
var y = d3.scale.linear() | |
.domain([0, height]) | |
.range([0, height]); | |
// adding a color scale | |
var color = d3.scale.linear() | |
.domain(colorDomain) | |
.range(colorRange); | |
// introduce color scale here | |
var treemap = d3.layout.treemap() | |
.children(function(d, depth) { return depth ? null : d._children; }) | |
.sort(function(a, b) { return a.value - b.value; }) | |
.ratio(height / width * 0.5 * (1 + Math.sqrt(5))) | |
.round(false); | |
var svg = d3.select("#chart").append("svg") | |
.attr("width", width + margin.left + margin.right) | |
.attr("height", height + margin.bottom + margin.top) | |
.style("margin-left", -margin.left + "px") | |
.style("margin.right", -margin.right + "px") | |
.append("g") | |
.attr("transform", "translate(" + margin.left + "," + margin.top + ")") | |
.style("shape-rendering", "crispEdges"); | |
var grandparent = svg.append("g") | |
.attr("class", "grandparent"); | |
grandparent.append("rect") | |
.attr("y", -margin.top) | |
.attr("width", width) | |
.attr("height", margin.top); | |
grandparent.append("text") | |
.attr("x", 6) | |
.attr("y", 6 - margin.top) | |
.attr("dy", ".75em"); | |
// functions | |
function initialize(root) { | |
root.x = root.y = 0; | |
root.dx = width; | |
root.dy = height; | |
root.depth = 0; | |
} | |
// Aggregate the values for internal nodes. This is normally done by the | |
// treemap layout, but not here because of our custom implementation. | |
// We also take a snapshot of the original children (_children) to avoid | |
// the children being overwritten when when layout is computed. | |
function accumulate(d) { | |
return (d._children = d.children) | |
// recursion step, note that p and v are defined by reduce | |
? d.value = d.children.reduce(function(p, v) {return p + accumulate(v); }, 0) | |
: d.value; | |
} | |
// Compute the treemap layout recursively such that each group of siblings | |
// uses the same size (1×1) rather than the dimensions of the parent cell. | |
// This optimizes the layout for the current zoom state. Note that a wrapper | |
// object is created for the parent node for each group of siblings so that | |
// the parent’s dimensions are not discarded as we recurse. Since each group | |
// of sibling was laid out in 1×1, we must rescale to fit using absolute | |
// coordinates. This lets us use a viewport to zoom. | |
function layout(d) { | |
if (d._children) { | |
// treemap nodes comes from the treemap set of functions as part of d3 | |
treemap.nodes({_children: d._children}); | |
d._children.forEach(function(c) { | |
c.x = d.x + c.x * d.dx; | |
c.y = d.y + c.y * d.dy; | |
c.dx *= d.dx; | |
c.dy *= d.dy; | |
c.parent = d; | |
// recursion | |
layout(c); | |
}); | |
} | |
} | |
function colorIncrements(d){ | |
return (colorDomain[colorDomain.length - 1] - colorDomain[0])/18*d + colorDomain[0]; | |
} | |
// determines if white or black will be better contrasting color | |
function getContrast50(hexcolor){ | |
return (parseInt(hexcolor.replace('#', ''), 16) > 0xffffff/3) ? 'black':'white'; | |
} | |
d3.json("TBchangeInCases2006to2012.json", function(root) { | |
console.log(root) | |
initialize(root); | |
accumulate(root); | |
layout(root); | |
display(root); | |
function display(d) { | |
grandparent | |
.datum(d.parent) | |
.on("click", transition) | |
.select("text") | |
.text(name(d)) | |
// color header based on grandparent's rate | |
grandparent | |
.datum(d.parent) | |
.select("rect") | |
.attr("fill", function(){console.log(color(d.rate)); return color(d['rate'])}) | |
var g1 = svg.insert("g", ".grandparent") | |
.datum(d) | |
.attr("class", "depth"); | |
var g = g1.selectAll("g") | |
.data(d._children) | |
.enter().append("g"); | |
g.filter(function(d) { return d._children; }) | |
.classed("children", true) | |
.on("click", transition); | |
g.selectAll(".child") | |
.data(function(d) { return d._children || [d]; }) | |
.enter().append("rect") | |
.attr("class", "child") | |
.call(rect); | |
g.append("rect") | |
.attr("class", "parent") | |
.call(rect) | |
.append("title") | |
.text(function(d) {console.log(typeof(d.value), d.value); return d.name + ', Cases of TB: ' + d.value + ', percent change: ' + formatNumber(d.rate); }); | |
g.append("text") | |
.attr("dy", ".75em") | |
.text(function(d) { return d.name; }) | |
.call(text); | |
function transition(d) { | |
if (transitioning || !d) return; | |
transitioning = true; | |
var g2 = display(d), | |
t1 = g1.transition().duration(750), | |
t2 = g2.transition().duration(750); | |
// Update the domain only after entering new elements. | |
x.domain([d.x, d.x + d.dx]); | |
y.domain([d.y, d.y + d.dy]); | |
// Enable anti-aliasing during the transition. | |
svg.style("shape-rendering", null); | |
// Draw child nodes on top of parent nodes. | |
svg.selectAll(".depth").sort(function(a, b) { return a.depth - b.depth; }); | |
// Fade-in entering text. | |
g2.selectAll("text").style("fill-opacity", 0); | |
// Transition to the new view. | |
t1.selectAll("text").call(text).style("fill-opacity", 0); | |
t2.selectAll("text").call(text).style("fill-opacity", 1); | |
t1.selectAll("rect").call(rect); | |
t2.selectAll("rect").call(rect); | |
// Remove the old node when the transition is finished. | |
t1.remove().each("end", function() { | |
svg.style("shape-rendering", "crispEdges"); | |
transitioning = false; | |
}); | |
} | |
return g; | |
} | |
function text(text) { | |
text.attr("x", function(d) { return x(d.x) + 6; }) | |
.attr("y", function(d) { return y(d.y) + 6; }) | |
.attr("fill", function (d) {return getContrast50(color(parseFloat(d.rate)))}); | |
} | |
function rect(rect) { | |
rect.attr("x", function(d) { return x(d.x); }) | |
.attr("y", function(d) { return y(d.y); }) | |
.attr("width", function(d) { return x(d.x + d.dx) - x(d.x); }) | |
.attr("height", function(d) { return y(d.y + d.dy) - y(d.y); }) | |
.attr("fill", function(d){return color(parseFloat(d.rate));}); | |
} | |
function name(d) { | |
return d.parent | |
? name(d.parent) + "." + d.name | |
: d.name; | |
} | |
}); | |
</script> |
{ | |
"children": [ | |
{ | |
"children": [ | |
{ | |
"rate": -0.4066358024691358, | |
"value": 769, | |
"name": "Black or African American, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.35092180546726004, | |
"value": 1021, | |
"name": "Hispanic or Latino" | |
}, | |
{ | |
"rate": -0.44886363636363635, | |
"value": 291, | |
"name": "White, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.4716981132075472, | |
"value": 28, | |
"name": "American Indian or Alaska Native, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.234860883797054, | |
"value": 935, | |
"name": "Asian or Pacific Islander, Non-Hispanic" | |
} | |
], | |
"rate": -0.348458904109589, | |
"name": "25-44 years" | |
}, | |
{ | |
"children": [ | |
{ | |
"rate": -0.36470588235294116, | |
"value": 324, | |
"name": "Black or African American, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.06147540983606557, | |
"value": 458, | |
"name": "Hispanic or Latino" | |
}, | |
{ | |
"rate": -0.3368055555555556, | |
"value": 573, | |
"name": "White, Non-Hispanic" | |
}, | |
{ | |
"rate": 0.14285714285714285, | |
"value": 32, | |
"name": "American Indian or Alaska Native, Non-Hispanic" | |
}, | |
{ | |
"rate": 0.010443864229765013, | |
"value": 774, | |
"name": "Asian or Pacific Islander, Non-Hispanic" | |
} | |
], | |
"rate": -0.18637048192771086, | |
"name": "65+ years" | |
}, | |
{ | |
"children": [ | |
{ | |
"rate": -0.4, | |
"value": 72, | |
"name": "Black or African American, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.4645669291338583, | |
"value": 68, | |
"name": "Hispanic or Latino" | |
}, | |
{ | |
"rate": -0.20833333333333334, | |
"value": 19, | |
"name": "White, Non-Hispanic" | |
}, | |
{ | |
"rate": 1.4, | |
"value": 12, | |
"name": "American Indian or Alaska Native, Non-Hispanic" | |
}, | |
{ | |
"rate": 0.18604651162790697, | |
"value": 51, | |
"name": "Asian or Pacific Islander, Non-Hispanic" | |
} | |
], | |
"rate": -0.30407523510971785, | |
"name": "5-14 years" | |
}, | |
{ | |
"children": [ | |
{ | |
"rate": -0.5954198473282443, | |
"value": 53, | |
"name": "Black or African American, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.5423076923076923, | |
"value": 119, | |
"name": "Hispanic or Latino" | |
}, | |
{ | |
"rate": -0.575, | |
"value": 17, | |
"name": "White, Non-Hispanic" | |
}, | |
{ | |
"rate": 0.75, | |
"value": 7, | |
"name": "American Indian or Alaska Native, Non-Hispanic" | |
}, | |
{ | |
"rate": 0.2391304347826087, | |
"value": 57, | |
"name": "Asian or Pacific Islander, Non-Hispanic" | |
} | |
], | |
"rate": -0.47401247401247404, | |
"name": "0-4 years" | |
}, | |
{ | |
"children": [ | |
{ | |
"rate": -0.39619651347068147, | |
"value": 762, | |
"name": "Black or African American, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.1719260065288357, | |
"value": 761, | |
"name": "Hispanic or Latino" | |
}, | |
{ | |
"rate": -0.2727272727272727, | |
"value": 608, | |
"name": "White, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.23809523809523808, | |
"value": 48, | |
"name": "American Indian or Alaska Native, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.05090137857900318, | |
"value": 895, | |
"name": "Asian or Pacific Islander, Non-Hispanic" | |
} | |
], | |
"rate": -0.2358936117325379, | |
"name": "45-64 years" | |
}, | |
{ | |
"children": [ | |
{ | |
"rate": -0.3829268292682927, | |
"value": 253, | |
"name": "Black or African American, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.46920821114369504, | |
"value": 362, | |
"name": "Hispanic or Latino" | |
}, | |
{ | |
"rate": -0.3368421052631579, | |
"value": 63, | |
"name": "White, Non-Hispanic" | |
}, | |
{ | |
"rate": 0.6363636363636364, | |
"value": 18, | |
"name": "American Indian or Alaska Native, Non-Hispanic" | |
}, | |
{ | |
"rate": -0.06116207951070336, | |
"value": 307, | |
"name": "Asian or Pacific Islander, Non-Hispanic" | |
} | |
], | |
"rate": -0.3422950819672131, | |
"name": "15-24 years" | |
} | |
], | |
"rate": -0.28656039777712783, | |
"name": "2006 to 2012" | |
} |