d3js: d3.nest() and filter() using Select box and svg circles.
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December 25, 2015 17:09
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d3js: d3.nest() and filter() using Select box and svg circles.
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| <!DOCTYPE html> | |
| <meta charset='utf-8'> | |
| <html> | |
| <head> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <link rel='stylesheet' href='style.css'> | |
| </head> | |
| <body> | |
| <script type='text/javascript' src='script.js'></script> | |
| </body> | |
| </html> |
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| var data = [ | |
| { | |
| "color" : "red", | |
| "cx" : 25, | |
| "cy" : 25, | |
| "r" : 10 | |
| }, | |
| { | |
| "color" : "green", | |
| "cx" : 55, | |
| "cy" : 55, | |
| "r" : 20 | |
| }, | |
| { | |
| "color" : "blue", | |
| "cx" : 75, | |
| "cy" : 75, | |
| "r" : 30 | |
| } | |
| ] | |
| var dataNested = d3.nest() | |
| .key(function (d) { return d.color; }) | |
| .entries(data) | |
| d3.select('body').append('div') | |
| .append('select') | |
| .on('change',change) | |
| .selectAll('option') | |
| .data(dataNested) | |
| .enter() | |
| .append('option') | |
| .attr('value',function (d) { return d.key }) | |
| .text(function (d) { return d.key }) | |
| var dataFiltered = dataNested.filter(function (d) { return d.key === 'red' }) | |
| var svg = d3.select('body').append('svg') | |
| .attr('height',150) | |
| .attr('width',150) | |
| var circles = svg.selectAll('circle') | |
| .data(dataFiltered[0].values) | |
| circles.enter() | |
| .append('circle') | |
| .attr('cx', function (d) { return d.cx }) | |
| .attr('cy', function (d) { return d.cy }) | |
| .attr('r', function (d) { return d.r }) | |
| .attr('fill', function (d) { return d.color }) | |
| function change() { | |
| var value = this.value | |
| dataFiltered = dataNested.filter(function (d) { return d.key === value }) | |
| circles.data(dataFiltered[0].values) | |
| .transition().duration(1000) | |
| .attr('cx', function (d) { return d.cx }) | |
| .attr('cy', function (d) { return d.cy }) | |
| .attr('r', function (d) { return d.r }) | |
| .attr('fill', function (d) { return d.color }) | |
| } |
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| /* CSS Here |
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