This is an example of implimenting an HTML input using a <range> input tag and using that to adjust multiple d3.js svg elements (spinning text!).
It is used as an example and described in the book D3 Tips and Tricks.
Last active
November 30, 2019 18:30
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HTML input and multiple d3.js objects
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| license: mit |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>Input test</title> | |
| <p> | |
| <label for="nAngle" | |
| style="display: inline-block; width: 240px; text-align: right"> | |
| angle = <span id="nAngle-value">…</span> | |
| </label> | |
| <input type="range" min="0" max="360" id="nAngle"> | |
| </p> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script> | |
| <script> | |
| var width = 600; | |
| var height = 300; | |
| var holder = d3.select("body") | |
| .append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| // draw d3.js text | |
| holder.append("text") | |
| .attr("class", "d3js") | |
| .style("fill", "black") | |
| .style("font-size", "56px") | |
| .attr("dy", ".35em") | |
| .attr("text-anchor", "middle") | |
| .attr("transform", "translate(300,55) rotate(0)") | |
| .text("d3.js"); | |
| // draw d3noob.org text | |
| holder.append("text") | |
| .attr("class", "d3noob") | |
| .style("fill", "black") | |
| .style("font-size", "56px") | |
| .attr("dy", ".35em") | |
| .attr("text-anchor", "middle") | |
| .attr("transform", "translate(300,130) rotate(0)") | |
| .text("d3noob.org"); | |
| // when the input range changes update the rectangle | |
| d3.select("#nAngle").on("input", function() { | |
| update(+this.value); | |
| }); | |
| // Initial starting height of the rectangle | |
| update(0); | |
| // update the elements | |
| function update(nAngle) { | |
| // adjust the range text | |
| d3.select("#nAngle-value").text(nAngle); | |
| d3.select("#nAngle").property("value", nAngle); | |
| // adjust d3.js text | |
| holder.select("text.d3js") | |
| .attr("transform", "translate(300,55) rotate("+nAngle+")"); | |
| // adjust d3noob.org text | |
| holder.select("text.d3noob") | |
| .attr("transform", "translate(300,130) rotate("+(360 - nAngle)+")"); | |
| } | |
| </script> |
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