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January 5, 2017 16:28
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d3 v4 translateBy, scaleBy and scaleTo example usage
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .view { | |
| fill: blue; | |
| stroke: #000; | |
| } | |
| </style> | |
| <h3>d3 v4 Zoom Experimentation</h3> | |
| <p>Call zoom.translateBy, zoom.scaleBy and zoom.scaleTo on rect element. Then reset using d3.zoomIdentity.</p> | |
| <svg width="500" 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 zoom = d3.zoom() | |
| .on("start", zoomStarted) | |
| .on("end", zoomEnded) | |
| .on("zoom", zoomed); | |
| var view = svg.append("rect") | |
| .attr("class", "view") | |
| .attr("x", 0.5) | |
| .attr("y", 0.5) | |
| .attr("width", width ) | |
| .attr("height", height ); | |
| setTimeout(function() { | |
| view.transition().duration(1000).call(zoom.translateBy, 200, 100); | |
| //Note: calling below would do same as above without transtiion | |
| //zoom.translateBy(view, 200, 100); | |
| }, 2000); | |
| setTimeout(function() { | |
| view.transition().duration(1000).call(zoom.scaleBy, 2); | |
| //Note: calling below would do same as above without transtiion | |
| //zoom.scaleBy(view, 2); | |
| }, 4000); | |
| setTimeout(function() { | |
| view.transition().duration(1000).call(zoom.scaleTo, .5); | |
| //Note: calling below would do same as above without transtiion | |
| //zoom.scaleTo(view, .5); | |
| }, 6000); | |
| setTimeout(function() { | |
| view.transition().duration(1000).call(zoom.transform, d3.zoomIdentity); | |
| }, 8000); | |
| function zoomStarted() { | |
| console.log('zoomStarted() - transform ' + d3.event.transform.toString()); | |
| } | |
| function zoomEnded() { | |
| console.log('zoomEnded() - transform ' + d3.event.transform.toString()); | |
| } | |
| function zoomed() { | |
| console.log('zoomed() - applying transform ' + d3.event.transform.toString()); | |
| //below is actually applying the transform, comment it out and observe!! | |
| view.attr("transform", d3.event.transform); | |
| } | |
| </script> |
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thanks a lot