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D3: Node Pulse
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| <!DOCTYPE html> | |
| <html xmlns="http://www.w3.org/1999/xhtml"> | |
| <head> | |
| <title>D3: Force Layout</title> | |
| <style> | |
| .visual-area { | |
| border: 2px solid #aa88aa; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script> | |
| var width = 500, | |
| height = 450, | |
| radius = 12, | |
| outlineColor = "green", | |
| pulseLineColor = "#ffffff", | |
| bgColor = "#45818e", | |
| pulseAnimationIntervalId; | |
| var nodesArray = [ | |
| { "x": 75, "y": 25 }, | |
| { "x": 200, "y": 55 }, | |
| { "x": 400, "y": 150 }, | |
| { "x": 200, "y": 300 }, | |
| { "x": 350, "y": 350 } | |
| ]; | |
| // Set up the SVG display area | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .attr("fill", bgColor) | |
| .classed('visual-area', true); | |
| var bgRect = d3.select("svg").append("rect") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var linkSet = null, | |
| nodeSet = null; | |
| // Create data object sets | |
| nodeSet = svg.selectAll(".node").data(nodesArray) | |
| .enter().append("g") | |
| .attr("class", "node") | |
| .on('click', function() { | |
| // Clear the pulse animation | |
| clearInterval(pulseAnimationIntervalId); | |
| }); | |
| // Draw outlines | |
| nodeSet.append("circle") | |
| .classed("outline pulse", true) | |
| .attr("cx", function(d) { return d.x;}) | |
| .attr("cy", function(d) { return d.y;}) | |
| .attr("fill", "none") | |
| .attr("stroke", pulseLineColor) | |
| .attr("r", radius); | |
| // Draw nodes on top of outlines | |
| nodeSet.append("circle") | |
| .attr("cx", function(d) { return d.x;}) | |
| .attr("cy", function(d) { return d.y;}) | |
| .attr("fill", "gray") | |
| .attr("stroke", outlineColor) | |
| .attr("r", radius); | |
| // Set pulse animation on interval | |
| pulseAnimationIntervalId = setInterval(function() { | |
| var times = 5, | |
| distance = 8, | |
| duration = 600; | |
| var outlines = svg.selectAll(".pulse"); | |
| // Function to handle one pulse animation | |
| function repeat(iteration) { | |
| if (iteration < times) { | |
| outlines.transition() | |
| .duration(duration) | |
| .each("start", function() { d3.select(".outline").attr("r", radius).attr("stroke", pulseLineColor); }) | |
| .attrTween("r", function() { return d3.interpolate(radius, radius + distance); }) | |
| .styleTween("stroke", function() { return d3.interpolate(pulseLineColor, bgColor); }) | |
| .each("end", function() {repeat(iteration+1);}); | |
| } | |
| } | |
| if (!outlines.empty()) { | |
| repeat(0); | |
| } | |
| }, 6000); | |
| </script> | |
| </body> | |
| </html> |
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