Change opacity with range slider
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November 27, 2016 15:13
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Change objects opacity
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <head> | |
| <link href="https://fonts.googleapis.com/css?family=Raleway" rel="stylesheet"> | |
| <style> | |
| body {font-size: 20px; font-family: 'Raleway', sans-serif; vertical-align: middle;} | |
| .leftlabel, .rightlabel { | |
| width: 50px; | |
| padding: 2px; | |
| text-align: center; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="//d3js.org/d3.v4.min.js"></script> | |
| <div id="objects"></div> | |
| <div style="margin-left: 150px; margin-top: 2px;"> | |
| <span class="leftlabel">0</span> | |
| <input id ="range1" type="range" min="0" max="100" value="100" style="width: 400px; margin-right: 10px;"/> | |
| <span class="rightlabel">100</span> | |
| </div> | |
| <script> | |
| var width = 800, | |
| height = 340; | |
| var svg = d3.select("#objects").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| //Make a circles | |
| svg.append("circle") | |
| .attr("cx", width/6) | |
| .attr("cy", 200) | |
| .attr("r", 60) | |
| .attr('id', "c1") | |
| .style("opacity", 1.0) | |
| .style("fill", "#f46d43"); | |
| svg.append("circle") | |
| .attr("cx", 2*width / 6) | |
| .attr("cy", 200) | |
| .attr("r", 60) | |
| .style("opacity", 1.0) | |
| .style("fill", "#f46d43"); | |
| svg.append("circle") | |
| .attr("cx", 3*width / 6) | |
| .attr("cy", 200) | |
| .attr("r", 60) | |
| .style("opacity", 1.0) | |
| .style("fill", "#f46d43"); | |
| svg.append("circle") | |
| .attr("cx", 4*width / 6) | |
| .attr("cy", 200) | |
| .attr("r", 60) | |
| .style("opacity", 1.0) | |
| .style("fill", "#f46d43"); | |
| svg.append("circle") | |
| .attr("cx", 5*width / 6) | |
| .attr("cy", 200) | |
| .attr("r", 60) | |
| .style("opacity", 1.0) | |
| .style("fill", "#f46d43"); | |
| d3.select("#range1").on("input", function () { | |
| svg.selectAll('circle') | |
| .transition() | |
| .duration(1000) | |
| .ease(d3.easeLinear) | |
| .style("opacity", d3.select("#range1").property("value")/100); | |
| }); | |
| </script> | |
| </body> |
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