More D3 without SVG. Create a hundred circles with canvas and turn them into imgs using toDataUrl, and then make a gallery out of them, which zooms in on mouseover.
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August 29, 2015 14:00
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Dynamic Image Gallery
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| <html xmlns="http://www.w3.org/1999/xhtml"> | |
| <head> | |
| <title>D3 in Action Gallery Example 1</title> | |
| <meta charset="utf-8" /> | |
| </head> | |
| <script src="http://d3js.org/d3.v3.min.js" type="text/javascript"></script> | |
| <script src="http://d3js.org/colorbrewer.v1.min.js"></script> | |
| <style> | |
| #gallery { | |
| position: relative; | |
| width:100%; | |
| } | |
| img.infinite { | |
| position: absolute; | |
| } | |
| </style> | |
| <body onload="galleryExample1()"> | |
| <div id="controls"> | |
| </div> | |
| </body> | |
| <footer> | |
| <script> | |
| function galleryExample1() { | |
| imageArray = []; | |
| d3.select("#controls").append("canvas").attr("height", 500).attr("width", 500); | |
| var context = d3.select("canvas").node().getContext("2d"); | |
| context.textAlign = "center"; | |
| context.font="200px Georgia"; | |
| colorScale = d3.scale.quantize().domain([0,1]).range(colorbrewer.Reds[7]); | |
| lineScale = d3.scale.quantize().domain([0,1]).range([10,40]); | |
| for (var x=0;x<100;x++) { | |
| context.clearRect(0,0,500,500); | |
| context.strokeStyle = colorScale(Math.random()); | |
| context.lineWidth = lineScale(Math.random()); | |
| context.fillStyle = colorScale(Math.random()); | |
| context.beginPath(); | |
| context.arc(250,250,200,0,2*Math.PI); | |
| context.fill(); | |
| context.stroke(); | |
| context.fillStyle = "black"; | |
| context.fillText(x,250,280); | |
| var dataURL = d3.select("canvas").node().toDataURL(); | |
| imageArray.push({x: x, data: dataURL}); | |
| } | |
| d3.select("canvas").remove(); | |
| d3.select("body") | |
| .append("div").attr("class", "gallery") | |
| .selectAll("img").data(imageArray).enter().append("img") | |
| .attr("class", "infinite") | |
| .attr("src", function(d) {return d.data}) | |
| .on("mouseover", highlightImage) | |
| .on("mouseout", dehighlightImage) | |
| redrawGallery(); | |
| function highlightImage(d) { | |
| var newWidth = parseFloat(d3.select("div.gallery").node().clientWidth); | |
| var imageSize = newWidth / 8; | |
| d3.select(this).transition().duration(500).style("width", imageSize * 2) | |
| this.parentNode.appendChild(this) | |
| } | |
| function dehighlightImage(d) { | |
| var newWidth = parseFloat(d3.select("div.gallery").node().clientWidth); | |
| var imageSize = newWidth / 8; | |
| d3.select(this).transition().duration(500).style("width", imageSize) | |
| } | |
| function redrawGallery() { | |
| var newHeight = parseFloat(d3.select("div.gallery").node().clientHeight); | |
| var newWidth = parseFloat(d3.select("div.gallery").node().clientWidth); | |
| var imageSize = newWidth / 8; | |
| d3.selectAll("img") | |
| .style("width", newWidth / 8) | |
| .style("top", function(d) {return Math.floor(d.x / 8) * imageSize}) | |
| .style("left", function(d) {return d.x%8 * imageSize}) | |
| } | |
| window.onresize = function(event) { | |
| redrawGallery(); | |
| } | |
| } | |
| </script> | |
| </footer> | |
| </html> |
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