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forked from ywwhack's block: stack transition
Created
June 11, 2017 08:16
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stack transition
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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", 960) | |
| .attr("height", 500) | |
| var data = [ | |
| { year: 2005, bananas: [10, 20, 30, 40], apples: [20, 10, 30, 50], pears: [30, 10, 20, 50] }, | |
| { year: 2006, bananas: [30, 40, 20, 10], apples: [20, 10, 10, 50], pears: [30, 20, 20, 50] }, | |
| { year: 2007, bananas: [10, 30, 30, 40], apples: [20, 10, 30, 50], pears: [40, 10, 20, 50] } | |
| ] | |
| const BAR_HEIGHT = 50 | |
| const FRUITS = ['bananas', 'apples', 'pears'] | |
| const COLORS = ['#21CD69', '#f8bc29', '#fb4848', '#ccc'] | |
| svg.selectAll('g.stack') | |
| .data(FRUITS) | |
| .enter().append('g') | |
| .attr('class', 'stack') | |
| .attr('transform', (d, i) => `translate(0, ${i * (BAR_HEIGHT + 10)})`) | |
| function update (year) { | |
| var filteredData = data.filter(i => i.year === year)[0] | |
| svg.selectAll('g.stack').nodes() | |
| .forEach((node, i) => { | |
| const fruitName = FRUITS[i] | |
| const t = d3.transition().duration(1000) | |
| const stack = d3.select(node) | |
| .selectAll('rect') | |
| .data(filteredData[fruitName], d => d) | |
| stack.exit() | |
| .transition(t) | |
| .attr('width', 0) | |
| .remove() | |
| let x = 0 | |
| stack.enter().append('rect') | |
| .attr('y', 0) | |
| .attr('height', BAR_HEIGHT) | |
| .merge(stack) | |
| .attr('fill', (d, i) => COLORS[i]) | |
| .transition(t) | |
| .attr('x', (d, i) => { | |
| const retX = x | |
| x += d * 5 | |
| return retX | |
| }) | |
| .attr('width', d => d * 5) | |
| }) | |
| } | |
| let year = 2005 | |
| let inc = 0 | |
| update(year) | |
| setInterval(() => { | |
| inc = (inc + 1) % 3 | |
| update(year + inc) | |
| }, 2000) | |
| </script> | |
| </body> |
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