Created
April 5, 2014 05:42
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .chart div { | |
| margin: 3px; | |
| padding: 1px; | |
| } | |
| .chart > div { | |
| background-color: red; | |
| } | |
| .chart > div > div { | |
| background-color: steelblue; | |
| color: white; | |
| } | |
| </style> | |
| <div class="chart"></div> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| function draw(data) { | |
| var divs = d3 | |
| .select(".chart") | |
| .selectAll(".parent") | |
| .data(data); | |
| var enter = divs | |
| .enter() | |
| .append('div') | |
| .attr('class', 'parent'); | |
| enter | |
| .append("div") | |
| .attr('class', 'first'); | |
| enter | |
| .append("div") | |
| .attr('class', 'second'); | |
| // Feel free to change the method if you want to test | |
| var method = 3; | |
| switch(method) { | |
| case 1: | |
| // This works, obviously: | |
| divs | |
| .select('.first') | |
| .text(function(d) { return d.i; }); | |
| divs | |
| .select('.second') | |
| .text(function(d) { return d.i; }); | |
| break; | |
| case 2: | |
| // This works also, as I create new propagated data: | |
| divs | |
| .selectAll('div') | |
| .data(function(d) { | |
| var padded = []; | |
| for(var i = 0; i < this.length; ++i) { | |
| padded.unshift(d); | |
| } | |
| return padded; | |
| }) | |
| .text(function(d) { return d.i; }); | |
| break; | |
| case 3: | |
| // I could do also this: | |
| divs | |
| .selectAll('div') | |
| .call(padData) | |
| .text(function(d) { return d.i; }); | |
| break; | |
| default: | |
| // I'd like to do something similar, built-in into d3.js, which selects all the divs and sets their value without manual the propagation and padding: | |
| // divs.selectAll('div').text(function(d) { return d.i; }); | |
| break; | |
| } | |
| }; | |
| function padData(divs) { | |
| return divs.data(function(d) { | |
| var padded = []; | |
| for(var i = 0; i < this.length; ++i) { | |
| padded.push(d); | |
| } | |
| return padded; | |
| }); | |
| } | |
| var d = []; | |
| for (var i = 0; i < 5; ++i) { | |
| d.unshift({i:i}); | |
| } | |
| draw(d); | |
| window.setInterval(function() { | |
| var r = Math.random()*100; | |
| d.unshift({i:r}); | |
| d.pop(); | |
| draw(d); | |
| }, 2000); | |
| </script> |
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