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New pass as d3
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Tom Gallacher
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14
spikes/architecture/d3-revamp/README.md
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spikes/architecture/d3-revamp/README.md
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# D3 graph layouts
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D3 v4, has a nice force directed graph set of features, that allows you to implement features in the graph with ease. By just manipulating the nodes using svg attributes and css.
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This with the addition that D3 is a very well respected and widely used toolkit, makes finding documentation and developer speed a breeze.
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It does seem to slow down on larger nodes, but this is mainly due to the built in force directed animation, disabling this, or computing this in a web-worker can speed up things considerably.
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As a developer I found my self more productive with the API that d3 exposes, and was able to accomplish more in the same time as other frameworks.
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## Research
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- React http://formidable.com/blog/2015/05/21/react-d3-layouts/
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spikes/architecture/d3-revamp/index.html
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spikes/architecture/d3-revamp/index.html
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<!DOCTYPE html>
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<meta charset='utf-8'>
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<style>
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.links line {
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stroke: #343434;
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stroke-opacity: 1;
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}
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.health {
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font-family: LibreFranklin;
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font-size: 12px;
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font-weight: bold;
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font-style: normal;
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font-stretch: normal;
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text-align: center;
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}
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.stat {
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font-family: LibreFranklin;
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font-size: 12px;
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font-weight: normal;
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font-style: normal;
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font-stretch: normal;
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line-height: 1.5;
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}
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</style>
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<svg width='960' height='700'></svg>
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<script src='https://d3js.org/d3.v4.min.js'></script>
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<script>
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var svg = d3.select('svg'),
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width = +svg.attr('width'),
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height = +svg.attr('height');
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var color = d3.scaleOrdinal(d3.schemeCategory20);
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var simulation = d3.forceSimulation()
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.force('charge', d3.forceManyBody().strength(() => -50).distanceMin(() => 30))
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.force('link', d3.forceLink().distance(() => 200).id(function(d) { return d.id; }))
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.force('collide', d3.forceCollide().radius(function(d) { return 128 + 0.5; }).iterations(2))
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.force('center', d3.forceCenter(width * 1/3, height * 1/3))
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function rightRoundedRect(x, y, width, height, radius) {
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return 'M' + x + ',' + y // Move to top left (absolute)
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+ 'h ' + (width - radius) // Horizontal line to (relative)
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+ 'a ' + radius + ',' + radius + ' 0 0 1 ' + radius + ',' + radius // Relative arc
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+ 'v ' + (height - 2 * radius) // Vertical line to (relative)
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+ 'a ' + radius + ',' + radius + ' 0 0 1 ' + -radius + ',' + radius // Relative arch
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+ 'h ' + (radius - width) // Horizontal lint to (relative)
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+ 'z '; // path back to start
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}
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function leftRoundedRect(x, y, width, height, radius) {
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return 'M' + (x + width) + ',' + y // Move to (absolute) start at top-right
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+ 'v ' + height // Vertical line to (relative)
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+ 'h ' + (radius - width) // Horizontal line to (relative)
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+ 'a ' + radius + ',' + radius + ' 0 0 1 ' + -radius + ',' + -radius // Relative arc
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+ 'v ' + -(height - 2 * radius) // Vertical line to (relative)
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+ 'a ' + radius + ',' + radius + ' 0 0 1 ' + radius + ',' + -radius // Relative arch
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+ 'z '; // path back to start
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}
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function topRoundedRect(x, y, width, height, radius) {
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return 'M' + x + ',' + -(y - height) // Move to (absolute) start at bottom-right
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+ 'v ' + -(height - 2 * radius) // Vertical line to (relative)
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+ 'a ' + radius + ',' + radius + ' 0 0 1 ' + radius + ',' + -radius // Relative arc
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+ 'h ' + -(radius - width) // Horizontal line to (relative)
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+ 'a ' + radius + ',' + radius + ' 0 0 1 ' + radius + ',' + radius // Relative arc
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+ 'v ' + (height - 2 * radius) // Vertical line to (relative)
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+ 'h ' + (radius - width) // Horizontal line to (relative)
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+ 'z '; // path back to start
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}
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function bottomRoundedRect(x, y, width, height, radius) {
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return 'M' + x + ',' + -(y - height) // Move to (absolute) start at bottom-right
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+ 'v ' + -(height - 2 * radius) // Vertical line to (relative)
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+ 'h ' + (radius + width) // Horizontal line to (relative)
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+ 'v ' + (height - 2 * radius) // Vertical line to (relative)
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+ 'a ' + -radius + ',' + radius + ' 0 0 1 ' + -radius + ',' + radius // Relative arc
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+ 'h ' + (radius - width) // Horizontal line to (relative)
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+ 'a ' + radius + ',' + radius + ' 0 0 1 ' + -radius + ',' + -radius // Relative arc
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+ 'z '; // path back to start
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}
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function rect(x, y, width, height, radius) {
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return 'M' + x + ',' + -(y - height - 2 * radius) // Move to (absolute) start at bottom-right
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+ 'v ' + -(height - 2 * radius) // Vertical line to (relative)
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+ 'h ' + (width + radius + 2) // Horizontal line to (relative)
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+ 'v ' + (height - 2 * radius) // Vertical line to (relative)
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+ 'h ' + (radius - width) // Horizontal line to (relative)
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+ 'z '; // path back to start
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}
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d3.json('services.json', function(error, graph) {
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if (error) throw error;
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// Drawing the links between nodes
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var link = svg.append('g')
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.attr('class', 'links')
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.selectAll('line')
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.data(graph.links)
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.enter().append('line')
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.attr('stroke-width', '2px')
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// And svg group, to contain all of the attributes in @antonas' first prototype
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var node = svg.selectAll('.node')
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.data(graph.nodes)
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.enter()
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.append('g')
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.attr('class', 'node_group');
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// Box where label will live
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node.append('path')
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.attr('class', 'node')
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.attr('d', topRoundedRect('0', '0', 170, 47, 4))
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.attr('stroke', '#343434')
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.attr('stroke-width', '1px')
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.attr('fill', '#464646')
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// Hover-over text for a node's label.
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var text = node.append('g')
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text.append('text')
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.attr('class', 'info_text')
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.attr('x', '12')
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.attr('y', '30')
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.attr('text-anchor', 'start')
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.attr('fill', '#fff')
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.text(d => d.id)
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text.append('circle')
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.attr('class', 'alert')
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.attr('cx', function () { return d3.select(this.parentNode).select('.info_text').node().getBBox().width + 30 })
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.attr('cy', '24')
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.attr('stroke-width', '0px')
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.attr('fill', (d) => d.id == 'Memcached' ? 'rgb(217, 77, 68)' : 'rgb(0,175,102)')
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.attr('r', '9px')
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// An icon or label that exists within the circle, inside the infobox
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text.append('text')
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.attr('class', 'health')
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.attr('x', function () { return d3.select(this.parentNode).select('.info_text').node().getBBox().width + 30 })
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.attr('y', '29')
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.attr('text-anchor', 'middle')
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.attr('fill', '#fff')
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.text((d) => d.id == 'Memcached' ? '!' : '❤')
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// Box where stats will live
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var stats = node.append('g');
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stats.append('path')
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.attr('class', 'node')
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.attr('d', (d) => d.id == 'Percona' ? rect('0', '-39', 170, 78, 2) : bottomRoundedRect('0', '-39', 170, 78, 4))
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.attr('stroke', '#343434')
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.attr('stroke-width', '1px')
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.attr('fill', '#464646')
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// An icon or label that exists within the circle, inside the infobox
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stats.append('text')
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.attr('class', 'cpu')
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.attr('class', 'stat')
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.attr('x', '12')
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.attr('y', '65')
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.attr('text-anchor', 'start')
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.attr('fill', 'rgba(255, 255, 255, 0.8)')
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.text('CPU: 63%')
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// An icon or label that exists within the circle, inside the infobox
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stats.append('text')
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.attr('class', 'memory')
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.attr('class', 'stat')
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.attr('x', '12')
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.attr('y', '85')
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.attr('text-anchor', 'start')
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.attr('fill', 'rgba(255, 255, 255, 0.8)')
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.text('Memory: 50%')
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// An icon or label that exists within the circle, inside the infobox
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stats.append('text')
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.attr('class', 'network')
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.attr('class', 'stat')
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.attr('x', '12')
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.attr('y', '105')
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.attr('text-anchor', 'start')
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.attr('fill', 'rgba(255, 255, 255, 0.8)')
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.text('Network: 1.23kb/sec')
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node.call(d3.drag()
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.on('start', dragstarted)
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.on('drag', dragged)
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.on('end', dragended));
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node.append('title')
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.text(function(d) { return d.id; });
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simulation
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.nodes(graph.nodes)
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.on('tick', ticked);
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simulation.force('link')
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.links(graph.links);
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function contrain(dimension, r, z) {
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return Math.max(0, Math.min(dimension - r, z))
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}
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function ticked() {
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r=180
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r2=130
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link
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.attr('x1', function(d) { return contrain(width, r, d.source.x) + 80; })
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.attr('y1', function(d) { return contrain(height, r2, d.source.y) + 24; })
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.attr('x2', function(d) { return contrain(width, r, d.target.x) + 80; })
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.attr('y2', function(d) { return contrain(height, r2, d.target.y) + 24; });
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svg.selectAll('.node_group')
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.attr('transform', function(d) {
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return 'translate(' + contrain(width, r, d.x) + ',' + contrain(height, r2, d.y) + ')';
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});
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}
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});
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function dragstarted(d) {
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if (!d3.event.active) simulation.alphaTarget(0.3).restart();
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d.fx = d.x;
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d.fy = d.y;
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}
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function dragged(d) {
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d.fx = d3.event.x;
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d.fy = d3.event.y;
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}
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function dragended(d) {
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if (!d3.event.active) simulation.alphaTarget(0);
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d.fx = null;
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d.fy = null;
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}
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</script>
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15
spikes/architecture/d3-revamp/services.json
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spikes/architecture/d3-revamp/services.json
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{
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"nodes": [
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{"id": "Nginx", "group": 1},
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{"id": "Wordpress", "group": 1},
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{"id": "Memcached", "group": 1},
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{"id": "Percona", "group": 1},
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{"id": "NFS", "group": 1}
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],
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"links": [
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{"source": "Nginx", "target": "Wordpress", "value": 1},
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{"source": "Wordpress", "target": "Memcached", "value": 8},
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{"source": "Wordpress", "target": "NFS", "value": 8},
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{"source": "Wordpress", "target": "Percona", "value": 8}
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]
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}
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