A series of related examples:
- Canvas geometric zooming
- Canvas semantic zooming
- SVG geometric zooming
- SVG semantic zooming
SVG Semantic Zooming
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <svg width="960" height="500"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var svg = d3.select("svg"), | |
| width = +svg.attr("width"), | |
| height = +svg.attr("height"); | |
| var randomX = d3.randomNormal(width / 2, 80), | |
| randomY = d3.randomNormal(height / 2, 80), | |
| data = d3.range(2000).map(function() { return [randomX(), randomY()]; }); | |
| var circle = svg.selectAll("circle") | |
| .data(data) | |
| .enter().append("circle") | |
| .attr("r", 2.5) | |
| .attr("transform", transform(d3.zoomIdentity)); | |
| svg.append("rect") | |
| .attr("fill", "none") | |
| .attr("pointer-events", "all") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .call(d3.zoom() | |
| .scaleExtent([1, 8]) | |
| .on("zoom", zoom)); | |
| function zoom() { | |
| circle.attr("transform", transform(d3.event.transform)); | |
| } | |
| function transform(t) { | |
| return function(d) { | |
| return "translate(" + t.apply(d) + ")"; | |
| }; | |
| } | |
| </script> |
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Are there any relevant changes one needs to do in order to migrate this code to v4?