force-layout

Example on a force direct graph can be found here: http://bl.ocks.org/950642 How can I easily add support for drag and drop? It should set the node to fixed with current location of where it dropped it. It is important that rest of the nodes still uses the 'force directed mode' to position rest of the nodes in the graph automatically https://github.com/mbostock/d3/wiki/Force-Layout I've played around a bit without success, and wondering if anyone is able to give me a quick example on how to add such support as explained above. Finally got it working after figuring out it is not ideal to fight

I managed to draw some basic d3 force layout graph, but struggling how to fix root node at the center. My data is rather simple; one root node with one-level children. Only one level. Another particular thing about my graph is that the link distance varies based on some parameter. I want root node to be at the center of the graph. Setting its property 'fixed':true doesn't work. Any idea to place root node at the center? force.on("tick", function() { nodes[0].x = w / 2; nodes[0].y = h / 2; That should do it. 来源： https://stackoverflow.com/questions/21843206/d3-force-layout-fix-root-node-at-the

I am trying to add text label to nodes in d3 Force Directed Graph, there seems to be an issue. This is my Fiddle : When I add the node name like this: node.append("text") .attr("class", "word") .attr("dy", ".35em") .text(function(d) { console.log(d.name); return d.name; }); There's no change but the names are getting logged. When i tried using bounding box , the node labels appeared but the nodes are stacked up on the top-left corner of box while the node links are fine.This fiddle is the outcome of that effort i put in. Can anyone tell me what am i doing wrong? You are adding a text element

I am new to D3 and working on a force directed graph where the json data is dynamic. I am able to change the force graph upon receiving new data but that happens with a springing effect. The code that creates my force graph is : <div class="graph"></div> <script> var w = 660, h = 700, r = 10; var vis = d3.select(".graph") .append("svg:svg") .attr("width", w) .attr("height", h) .attr("pointer-events", "all") .append('svg:g') .call(d3.behavior.zoom().on("zoom", redraw)) .append('svg:g'); vis.append('svg:rect') .attr('width', w) .attr('height', h) .attr('fill', 'rgba(1,1,1,0)'); function redraw()

This is my code look like, you can also have full code on JsFiddle . I want to have labels on every node, but I can't. By the way, labels can be embedded in the circle in the console . var nodes = svg.selectAll("circle") .data(dataset.nodes) .enter() .append("circle") .attr("r", 10) .style("fill", function(d, i){ return colors(i); }) .call(force.drag); var label = nodes.append("svg:text") .text(function (d) { return d.name; }) .style("text-anchor", "middle") .style("fill", "#555") .style("font-family", "Arial") .style("font-size", 12); force.on("tick", function(){ edges.attr("x1", function(d){