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forked from chule's block: circles enter-update-exit
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September 11, 2019 09:55
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circles selection.join
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| license: mit |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v5.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var margin = {top: 50, right: 40, bottom: 50, left: 40}; | |
| var svgWidth = 960, | |
| svgHeight = 500; | |
| var width = svgWidth - (margin.left + margin.right); | |
| var height = svgHeight - (margin.top + margin.bottom); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", svgWidth) | |
| .attr("height", svgHeight) | |
| var button = svg | |
| .append("g") | |
| .attr("transform", "translate(20,20)") | |
| button | |
| .append("rect") | |
| .attr("width", 110) | |
| .attr("height", 50) | |
| .attr("class", "button") | |
| .style("fill", "darkred"); | |
| button | |
| .append("text") | |
| .text("CLICK ME") | |
| .attr("x", 10) | |
| .attr("y", 32) | |
| .style("fill", "white") | |
| .style("pointer-events", "none") | |
| .attr("font-family", "monospace") | |
| .attr("font-size", 18) | |
| var dataset0 = true; | |
| button.on("click", function() { | |
| if (dataset0) { | |
| d3.select(".button") | |
| .style("fill", "steelblue") | |
| draw(data1); | |
| dataset0 = false; | |
| } else { | |
| d3.select(".button") | |
| .style("fill", "darkred") | |
| draw(data0); | |
| dataset0 = true; | |
| } | |
| }); | |
| var data0 = [10,20,50,30,40,33,78]; | |
| var data1 = [40,20,80,30,55,22,22,66]; | |
| var extent = d3.extent(data0.concat(data1), function (d) {return d}); | |
| var xScale = d3.scaleLinear() | |
| .domain(extent) | |
| .range([0, width]); | |
| var mainG = svg.append("g") | |
| .attr("transform","translate(" + [margin.left, margin.top] + ")"); | |
| function draw(data) { | |
| var circles = mainG.selectAll("circle") | |
| .data(data) | |
| .join( | |
| enter => enter.append("circle") | |
| .attr("cy", 200) | |
| .attr("r", function(d,i) {return d}) | |
| .style("fill", "green") | |
| .attr("cx", d => xScale(d)), | |
| update => update | |
| .style("fill", "steelblue") | |
| .transition() | |
| .duration(750) | |
| .attr("cx", d => xScale(d)), | |
| exit => exit | |
| .style("fill", "darkred") | |
| .transition() | |
| .duration(750) | |
| .style("opacity", 0) | |
| .remove() | |
| ); | |
| }; | |
| draw(data0); | |
| </script> | |
| </body> |
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