This example demonstrates using a transition on a (collection of) SVG path in d3-template.
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September 30, 2018 14:01
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Render simple transition on multiple SVG paths
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| license: gpl-3.0 | |
| height: 540 | |
| scrolling: yes |
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> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font-family: "Helvetica Neue", Helvetica, sans-serif; | |
| } | |
| svg { | |
| border: 1px solid #aaaaaa; | |
| } | |
| path { | |
| fill: none; | |
| } | |
| .button { | |
| display: inline-block; | |
| border: 1px solid #aaaaaa; | |
| border-radius: .4em; | |
| width: 4em; | |
| height: 2em; | |
| line-height: 2em; | |
| text-align: center; | |
| cursor: pointer; | |
| /* Prevent selection when clicking repeatedly */ | |
| -webkit-touch-callout: none; | |
| -webkit-user-select: none; | |
| -khtml-user-select: none; | |
| -moz-user-select: none; | |
| -ms-user-select: none; | |
| user-select: none; | |
| } | |
| </style> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://unpkg.com/d3-template-plugin/build/d3-template.min.js"></script> | |
| <svg width="500" height="500"> | |
| <g data-repeat="{{d}}"> | |
| <path d="M250,250 250,250 250,250 250,250 250,250 250,250 250,250 250,250 Z" data-attr-d="{{coordinatesToPath(d.coords)}}" data-style-stroke="{{d.color}}"></path> | |
| </g> | |
| </svg> | |
| <div> | |
| <span class="button minus">-</span> <span class="button plus">+</span> | |
| </div> | |
| <script> | |
| function coordinatesToPath(d) { | |
| return "M" + d.map(function(coord) { return coord.x + "," + coord.y; }) .join(" ") + "Z"; | |
| } | |
| var count = 3; | |
| var color = d3.scaleOrdinal(d3.schemeCategory20); | |
| var repeat = function() { | |
| // Create new data collection | |
| var data = []; | |
| for(var i = 0; i < count; i++) { | |
| // Create 4 corners (in 4 quadrants) randomly | |
| var coords = [ | |
| { x: 200 - (Math.random() * 200 | 0), y: 200 - (Math.random() * 200 | 0) }, | |
| { x: 300 + (Math.random() * 200 | 0), y: 200 - (Math.random() * 200 | 0) }, | |
| { x: 300 + (Math.random() * 200 | 0), y: 300 + (Math.random() * 200 | 0) }, | |
| { x: 200 - (Math.random() * 200 | 0), y: 300 + (Math.random() * 200 | 0) } | |
| ]; | |
| // Add 4 'middle' points with some randomness | |
| for(var j = 0; j < 8; j += 2) { | |
| coords.splice(j + 1, 0, { | |
| x: (coords[j].x + coords[(j + 1) % coords.length].x) / 2 + (Math.random() * 100 | 0) - 50, | |
| y: (coords[j].y + coords[(j + 1) % coords.length].y) / 2 + (Math.random() * 100 | 0) - 50 | |
| }); | |
| } | |
| // Add coordinates and color to data collection | |
| data.push({ | |
| coords: coords, | |
| color: color(i) | |
| }); | |
| } | |
| // Select template and render data on transition | |
| d3.select("svg") | |
| .transition() | |
| .duration(750) | |
| .render(data) | |
| .on("end", function() { | |
| repeat(); | |
| }) | |
| ; | |
| }; | |
| // Add event handlers to buttons | |
| d3.select(".button.minus").on("click", function() { | |
| if(count > 1) { | |
| count--; | |
| } | |
| }); | |
| d3.select(".button.plus").on("click", function() { | |
| count++; | |
| }); | |
| // Create template and start drawing | |
| d3.select("svg").template(); | |
| repeat(); | |
| </script> |
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