D3强制布局：如何更新链接颜色？
我有和更新D3版面布局链接时发出。 这是我的代码：
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> <title>Force-Directed Graph</title> <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> <style type="text/css"> circle.node { cursor: pointer; stroke: #00F000; stroke-width: 4px; } line.link { fill: none; stroke: #9ecae1; stroke-width: 1.5px; } </style> <script src="https://code.jquery.com/jquery-3.1.1.js" integrity="sha256-16cdPddA6VdVInumRGo6IbivbERE8p7CQR3HzTBuELA=" crossorigin="anonymous"></script> </head> <body> <div class="row"> <div > <div class="id_100"> <select> </select> </div> </div> <div id="chart"></div> </div> <script type="text/javascript"> var select = ''; var w = 1060, h = 800, node, link, root, t; var COLLAPSE_LEVEL = 1; var force = d3.layout.force() .on("tick", tick) .size([w, h]); var vis = d3.select("#chart").append("svg:svg") .attr("width", w) .attr("height", h); root = { "name": "flare", "children": [ { "name": "analytics", "children": [ { "name": "cluster", "children": [ {"name": "AgglomerativeCluster", "size": 3938}, {"name": "CommunityStructure", "size": 3812}, {"name": "HierarchicalCluster", "size": 6714}, {"name": "MergeEdge", "size": 743} ] }, { "name": "graph", "children": [ {"name": "BetweennessCentrality", "size": 3534}, {"name": "LinkDistance", "size": 5731}, {"name": "MaxFlowMinCut", "size": 7840}, {"name": "ShortestPaths", "size": 5914}, {"name": "SpanningTree", "size": 3416} ] }, { "name": "optimization", "children": [ {"name": "AspectRatioBanker", "size": 7074} ] } ] }, { "name": "animate", "children": [ {"name": "Easing", "size": 17010}, {"name": "FunctionSequence", "size": 5842}, { "name": "interpolate", "children": [ {"name": "ArrayInterpolator", "size": 1983}, {"name": "ColorInterpolator", "size": 2047}, {"name": "DateInterpolator", "size": 1375}, {"name": "Interpolator", "size": 8746}, {"name": "MatrixInterpolator", "size": 2202}, {"name": "NumberInterpolator", "size": 1382}, {"name": "ObjectInterpolator", "size": 1629}, {"name": "PointInterpolator", "size": 1675}, {"name": "RectangleInterpolator", "size": 2042} ] }, {"name": "ISchedulable", "size": 1041}, {"name": "Parallel", "size": 5176}, {"name": "Pause", "size": 449}, {"name": "Scheduler", "size": 5593}, {"name": "Sequence", "size": 5534}, {"name": "Transition", "size": 9201}, {"name": "Transitioner", "size": 19975}, {"name": "TransitionEvent", "size": 1116}, {"name": "Tween", "size": 6006} ] }, { "name": "data", "children": [ { "name": "converters", "children": [ {"name": "Converters", "size": 721}, {"name": "DelimitedTextConverter", "size": 4294}, {"name": "GraphMLConverter", "size": 9800}, {"name": "IDataConverter", "size": 1314}, {"name": "JSONConverter", "size": 2220} ] }, {"name": "DataField", "size": 1759}, {"name": "DataSchema", "size": 2165}, {"name": "DataSet", "size": 586}, {"name": "DataSource", "size": 3331}, {"name": "DataTable", "size": 772}, {"name": "DataUtil", "size": 3322} ] }, { "name": "display", "children": [ {"name": "DirtySprite", "size": 8833}, {"name": "LineSprite", "size": 1732}, {"name": "RectSprite", "size": 3623}, {"name": "TextSprite", "size": 10066} ] }, { "name": "flex", "children": [ {"name": "FlareVis", "size": 4116} ] }, { "name": "physics", "children": [ {"name": "DragForce", "size": 1082}, {"name": "GravityForce", "size": 1336}, {"name": "IForce", "size": 319}, {"name": "NBodyForce", "size": 10498}, {"name": "Particle", "size": 2822}, {"name": "Simulation", "size": 9983}, {"name": "Spring", "size": 2213}, {"name": "SpringForce", "size": 1681} ] }, { "name": "query", "children": [ {"name": "AggregateExpression", "size": 1616}, {"name": "And", "size": 1027}, {"name": "Arithmetic", "size": 3891}, {"name": "Average", "size": 891}, {"name": "BinaryExpression", "size": 2893}, {"name": "Comparison", "size": 5103}, {"name": "CompositeExpression", "size": 3677}, {"name": "Count", "size": 781}, {"name": "DateUtil", "size": 4141}, {"name": "Distinct", "size": 933}, {"name": "Expression", "size": 5130}, {"name": "ExpressionIterator", "size": 3617}, {"name": "Fn", "size": 3240}, {"name": "If", "size": 2732}, {"name": "IsA", "size": 2039}, {"name": "Literal", "size": 1214}, {"name": "Match", "size": 3748}, {"name": "Maximum", "size": 843}, { "name": "methods", "children": [ {"name": "add", "size": 593}, {"name": "and", "size": 330}, {"name": "average", "size": 287}, {"name": "count", "size": 277}, {"name": "distinct", "size": 292}, {"name": "div", "size": 595}, {"name": "eq", "size": 594}, {"name": "fn", "size": 460}, {"name": "gt", "size": 603}, {"name": "gte", "size": 625}, {"name": "iff", "size": 748}, {"name": "isa", "size": 461}, {"name": "lt", "size": 597}, {"name": "lte", "size": 619}, {"name": "max", "size": 283}, {"name": "min", "size": 283}, {"name": "mod", "size": 591}, {"name": "mul", "size": 603}, {"name": "neq", "size": 599}, {"name": "not", "size": 386}, {"name": "or", "size": 323}, {"name": "orderby", "size": 307}, {"name": "range", "size": 772}, {"name": "select", "size": 296}, {"name": "stddev", "size": 363}, {"name": "sub", "size": 600}, {"name": "sum", "size": 280}, {"name": "update", "size": 307}, {"name": "variance", "size": 335}, {"name": "where", "size": 299}, {"name": "xor", "size": 354}, {"name": "_", "size": 264} ] }, {"name": "Minimum", "size": 843}, {"name": "Not", "size": 1554}, {"name": "Or", "size": 970}, {"name": "Query", "size": 13896}, {"name": "Range", "size": 1594}, {"name": "StringUtil", "size": 4130}, {"name": "Sum", "size": 791}, {"name": "Variable", "size": 1124}, {"name": "Variance", "size": 1876}, {"name": "Xor", "size": 1101} ] }, { "name": "scale", "children": [ {"name": "IScaleMap", "size": 2105}, {"name": "LinearScale", "size": 1316}, {"name": "LogScale", "size": 3151}, {"name": "OrdinalScale", "size": 3770}, {"name": "QuantileScale", "size": 2435}, {"name": "QuantitativeScale", "size": 4839}, {"name": "RootScale", "size": 1756}, {"name": "Scale", "size": 4268}, {"name": "ScaleType", "size": 1821}, {"name": "TimeScale", "size": 5833} ] }, { "name": "util", "children": [ {"name": "Arrays", "size": 8258}, {"name": "Colors", "size": 10001}, {"name": "Dates", "size": 8217}, {"name": "Displays", "size": 12555}, {"name": "Filter", "size": 2324}, {"name": "Geometry", "size": 10993}, { "name": "heap", "children": [ {"name": "FibonacciHeap", "size": 9354}, {"name": "HeapNode", "size": 1233} ] }, {"name": "IEvaluable", "size": 335}, {"name": "IPredicate", "size": 383}, {"name": "IValueProxy", "size": 874}, { "name": "math", "children": [ {"name": "DenseMatrix", "size": 3165}, {"name": "IMatrix", "size": 2815}, {"name": "SparseMatrix", "size": 3366} ] }, {"name": "Maths", "size": 17705}, {"name": "Orientation", "size": 1486}, { "name": "palette", "children": [ {"name": "ColorPalette", "size": 6367}, {"name": "Palette", "size": 1229}, {"name": "ShapePalette", "size": 2059}, {"name": "SizePalette", "size": 2291} ] }, {"name": "Property", "size": 5559}, {"name": "Shapes", "size": 19118}, {"name": "Sort", "size": 6887}, {"name": "Stats", "size": 6557}, {"name": "Strings", "size": 22026} ] }, { "name": "vis", "children": [ { "name": "axis", "children": [ {"name": "Axes", "size": 1302}, {"name": "Axis", "size": 24593}, {"name": "AxisGridLine", "size": 652}, {"name": "AxisLabel", "size": 636}, {"name": "CartesianAxes", "size": 6703} ] }, { "name": "controls", "children": [ {"name": "AnchorControl", "size": 2138}, {"name": "ClickControl", "size": 3824}, {"name": "Control", "size": 1353}, {"name": "ControlList", "size": 4665}, {"name": "DragControl", "size": 2649}, {"name": "ExpandControl", "size": 2832}, {"name": "HoverControl", "size": 4896}, {"name": "IControl", "size": 763}, {"name": "PanZoomControl", "size": 5222}, {"name": "SelectionControl", "size": 7862}, {"name": "TooltipControl", "size": 8435} ] }, { "name": "data", "children": [ {"name": "Data", "size": 20544}, {"name": "DataList", "size": 19788}, {"name": "DataSprite", "size": 10349}, {"name": "EdgeSprite", "size": 3301}, {"name": "NodeSprite", "size": 19382}, { "name": "render", "children": [ {"name": "ArrowType", "size": 698}, {"name": "EdgeRenderer", "size": 5569}, {"name": "IRenderer", "size": 353}, {"name": "ShapeRenderer", "size": 2247} ] }, {"name": "ScaleBinding", "size": 11275}, {"name": "Tree", "size": 7147}, {"name": "TreeBuilder", "size": 9930} ] }, { "name": "events", "children": [ {"name": "DataEvent", "size": 2313}, {"name": "SelectionEvent", "size": 1880}, {"name": "TooltipEvent", "size": 1701}, {"name": "VisualizationEvent", "size": 1117} ] }, { "name": "legend", "children": [ {"name": "Legend", "size": 20859}, {"name": "LegendItem", "size": 4614}, {"name": "LegendRange", "size": 10530} ] }, { "name": "operator", "children": [ { "name": "distortion", "children": [ {"name": "BifocalDistortion", "size": 4461}, {"name": "Distortion", "size": 6314}, {"name": "FisheyeDistortion", "size": 3444} ] }, { "name": "encoder", "children": [ {"name": "ColorEncoder", "size": 3179}, {"name": "Encoder", "size": 4060}, {"name": "PropertyEncoder", "size": 4138}, {"name": "ShapeEncoder", "size": 1690}, {"name": "SizeEncoder", "size": 1830} ] }, { "name": "filter", "children": [ {"name": "FisheyeTreeFilter", "size": 5219}, {"name": "GraphDistanceFilter", "size": 3165}, {"name": "VisibilityFilter", "size": 3509} ] }, {"name": "IOperator", "size": 1286}, { "name": "label", "children": [ {"name": "Labeler", "size": 9956}, {"name": "RadialLabeler", "size": 3899}, {"name": "StackedAreaLabeler", "size": 3202} ] }, { "name": "layout", "children": [ {"name": "AxisLayout", "size": 6725}, {"name": "BundledEdgeRouter", "size": 3727}, {"name": "CircleLayout", "size": 9317}, {"name": "CirclePackingLayout", "size": 12003}, {"name": "DendrogramLayout", "size": 4853}, {"name": "ForceDirectedLayout", "size": 8411}, {"name": "IcicleTreeLayout", "size": 4864}, {"name": "IndentedTreeLayout", "size": 3174}, {"name": "Layout", "size": 7881}, {"name": "NodeLinkTreeLayout", "size": 12870}, {"name": "PieLayout", "size": 2728}, {"name": "RadialTreeLayout", "size": 12348}, {"name": "RandomLayout", "size": 870}, {"name": "StackedAreaLayout", "size": 9121}, {"name": "TreeMapLayout", "size": 9191} ] }, {"name": "Operator", "size": 2490}, {"name": "OperatorList", "size": 5248}, {"name": "OperatorSequence", "size": 4190}, {"name": "OperatorSwitch", "size": 2581}, {"name": "SortOperator", "size": 2023} ] }, {"name": "Visualization", "size": 16540} ] } ] }; root.children.forEach(function(d){ $("select").append(new Option(d.name, "value")); }); function parseLevel(node, level) { node.level = level; if (typeof node.children !== 'undefined') { node.children.forEach(function(children) { parseLevel(children, level + 1); }); } } parseLevel(root, 0); var big = ''; function isChildofQuery(children, value){ if(children === null) return; children.forEach(function(d){ d['isQChild'] = value; if (d.name === $("select").find('option:selected').text()){ console.log("#_###############-----------------------------------------------------------------------#") isChildofQuery(d.children, true); d['isQChild'] = true; } else if (d.children){ isChildofQuery(d.children, false); } }) //update(root); } big = 'flex'; isChildofQuery(root.children, false); update(); function toggleAll(d) { if (d.children) { d.children.forEach(toggleAll); if (d.level < COLLAPSE_LEVEL){ return; } toggle(d); } } // Initialize the display to show a few nodes. root.children.forEach(toggleAll); update(root); $('select').on('change', function(d) { var select = $("select").find('option:selected').text(); isChildofQuery(root.children, false); update(root); }); function update() { var nodes = flatten(root), links = d3.layout.tree().links(nodes); // Restart the force layout. force .nodes(nodes) .links(links) .charge(-1000) .linkDistance(100) .friction(0.5) .start(); // Update the links… link = vis.selectAll("line.link") .data(links, function(d) { return d.target.id; }); // Enter any new links. link.enter().insert("svg:line", ".node") .attr("class", "link") .attr("x1", function(d) { return d.source.x; }) .attr("y1", function(d) { return d.source.y; }) .attr("x2", function(d) { return d.target.x; }) .attr("y2", function(d) { return d.target.y; }) .style("stroke", function(d){ console.log( '###################################################################################' ); return d.target.isQChild ? "red" : "#9ecae1;"; }) .style("stroke-width", function(d){ return d.target.isQChild ? '3px' : '1.5px'; }) // Exit any old links. link.exit().remove(); // Update the nodes… node = vis.selectAll("circle.node") .data(nodes, function(d) { return d.id; }) .style("fill", color); // Enter any new nodes. node.enter().append("svg:circle") .attr("class", "node") .attr("cx", function(d) { return dx; }) .attr("cy", function(d) { return dy; }) .attr("r", function(d){ if(d.name === 'Or'){ return '30'; } return '15'; } ) .style("fill", color) .on("click", mouseover) .call(force.drag); // Exit any old nodes. node.exit().remove(); t = vis.selectAll(".t-node") .data(nodes, function(d) { return d.id; }) .style("fill", color); // Enter any new nodes. t.enter().append("svg:text") .attr("class", "t-node") .attr("dx", "25px") .attr("y", 0) .text(function(d){return d.name }); // .call(force.drag); // Exit any old nodes. t.exit().remove(); } function tick() { link.attr("x1", function(d) { return d.source.x; }) .attr("y1", function(d) { return d.source.y; }) .attr("x2", function(d) { return d.target.x; }) .attr("y2", function(d) { return d.target.y; }); node.attr("cx", function(d) { return dx; }) .attr("cy", function(d) { return dy; }); t.attr("x", function(d) { return dx; }) .attr("y", function(d) { return dy; }); } // Color leaf nodes orange, and packages white or blue. function color(d) { if($("select").find('option:selected').text() === d.name){ return '#FFFF00'; } return d.name === select ? '#FFFF00': d._children ? "#3182bd" : d.children ? "#c6dbef" : "#fd8d3c"; } /* $('select').on('change', function(d) { console.log('selected ...'); isChildofQuery(root.children, false); //console.log(select); update(); }); */ // Toggle children on click. function mouseover(d) { if (d.children) { d._children = d.children; d.children = null; } else { d.children = d._children; d._children = null; } update(); } // Returns a list of all nodes under the root. function flatten(root) { var nodes = [], i = 0; function recurse(node) { if (node.children) node.children.forEach(recurse); if (!node.id) node.id = ++i; nodes.push(node); } recurse(root); return nodes; } function toggle(d) { if (d.children) { d._children = d.children; d.children = null; } else { d.children = d._children; d._children = null; } } </script> </body> </html> 在这段代码中，我有一个名为isChildofQuery(root.children, false);的函数isChildofQuery(root.children, false); 该function的目标是突出显示节点周围的所有链接。 第一次创buildgraphics时，这是非常完美的（所选节点的颜色是黄色，所有链接都是红色的）。 但是当select的节点发生变化时（select顶部的选项），新节点的颜色被正确地改变，但是被select的链接不正确。 有人能帮我知道什么是好的吗？
你只需要改变你的“更新”select：
link.style("stroke", function(d) { return d.target.isQChild ? "red" : "#9ecae1"; }) .style("stroke-width", function(d) { return d.target.isQChild ? '3px' : '1.5px'; });
这里是你更新的小提琴： https : //jsfiddle.net/ssgyokrx/