d3js force directed - On hover to node, highlight/

2020-07-10 11:51发布

站内问答 / JavaScript
436 1 5

I have force directed graph with 4 types of nodes and two types of links. One type of node (the small blue one) I'm using as "connection node" between two bigger nodes.

on mouseover node, it gets bigger, but also I wanna colour up "connections" to this node in different color. So whey you hover over a node... all links and little "connection nodes" gets in the different color, so you can know to which other bigger node is this one hovered connected.

You can see my situation on following link: http://jsfiddle.net/2pdxz/

For example: If you hover up Google node, links to Yahoo with "connection" node gets highlighted and links to CDO and CTO gets highlighted

I've tried to add this part of code:

function fade(opacity) 
{  link.style("opacity", function(d) {
   return d.source === d || d.target === d ? 1 : opacity;
                });
            
            }

which I picked up from some other question with the similar problem but I don't know how this could actually help me, because I'm noob about d3js.

The exact code looks like this

Script:

var data = {"nodes":[
                            {"name":"YHO", "full_name":"Yahoo", "type":1, "slug": "www.yahoo.com", "entity":"company", "img_hrefD":"", "img_hrefL":""},
                            {"name":"GGL", "full_name":"Google", "type":2, "slug": "www.google.com", "entity":"company", "img_hrefD":"", "img_hrefL":""},
                            {"name":"BNG", "full_name":"Bing", "type":2, "slug": "www.bing.com", "entity":"company", "img_hrefD":"", "img_hrefL":""},
                            {"name":"YDX", "full_name":"Yandex", "type":2, "slug": "www.yandex.com", "entity":"company", "img_hrefD":"", "img_hrefL":""},
                            
                            {"name":"Desc1", "type":4, "slug": "", "entity":"description"},
                            {"name":"Desc2", "type":4, "slug": "", "entity":"description"},
                            {"name":"Desc4", "type":4, "slug": "", "entity":"description"},
                            
                            {"name":"CEO", "prefix":"Mr.", "fst_name":"Jim", "snd_name":"Bean", "type":3, "slug": "", "entity":"employee"},
                            {"name":"ATT", "prefix":"Ms.", "fst_name":"Jenna", "snd_name":"Jameson", "type":3, "slug": "", "entity":"employee"},
                            {"name":"CTO", "prefix":"Mr.", "fst_name":"Lucky", "snd_name":"Luke", "type":3, "slug": "", "entity":"employee"},
                            {"name":"CDO", "prefix":"Ms.", "fst_name":"Pamela", "snd_name":"Anderson", "type":3, "slug": "", "entity":"employee"},
                            {"name":"CEO", "prefix":"Mr.", "fst_name":"Nacho", "snd_name":"Vidal", "type":3, "slug": "", "entity":"employee"},
                        ], 
                "links":[
                            {"source":0,"target":4,"value":1,"distance":5},
                            {"source":0,"target":5,"value":1,"distance":5},
                            {"source":0,"target":6,"value":1,"distance":5},
                            
                            {"source":1,"target":4,"value":1,"distance":5},
                            {"source":2,"target":5,"value":1,"distance":5},
                            {"source":3,"target":6,"value":1,"distance":5},
                            
                            {"source":7,"target":3,"value":10,"distance":6},
                            {"source":8,"target":3,"value":10,"distance":6},
                            {"source":9,"target":1,"value":10,"distance":6},
                            {"source":10,"target":1,"value":10,"distance":6},
                            {"source":11,"target":2,"value":10,"distance":6},
                            ]
                   }    
            
            
            
        var w = 560,
            h = 500,
            radius = d3.scale.log().domain([0, 312000]).range(["10", "50"]);
        
        var vis = d3.select("body").append("svg:svg")
            .attr("width", w)
            .attr("height", h);
            
            //vis.append("defs").append("marker")
            //.attr("id", "arrowhead")
            //.attr("refX", 22 + 3) /*must be smarter way to calculate shift*/
            //.attr("refY", 2)
            //.attr("markerWidth", 6)
            //.attr("markerHeight", 4)
            //.attr("orient", "auto")
            //.append("path")
                //.attr("d", "M 0,0 V 4 L6,2 Z"); //this is actual shape for arrowhead
        
        //d3.json(data, function(json) {
            var force = self.force = d3.layout.force()
                .nodes(data.nodes)
                .links(data.links)
                .linkDistance(function(d) { return (d.distance*10); })
                //.friction(0.5)
                .charge(-250)
                .size([w, h])
                .start();
        
        
        
            var link = vis.selectAll("line.link")
                .data(data.links)
                .enter().append("svg:line")
                .attr("class", function (d) { return "link" + d.value +""; })
                .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; })
                .attr("marker-end", function(d) {
                                                    if (d.value == 1) {return "url(#arrowhead)"}
                                                    else    { return " " }
                                                ;});

            function fade(opacity) {
                
                    link.style("opacity", function(d) {
                        return d.source === d || d.target === d ? 1 : opacity;
                    });
                
                }
                
                
            function openLink() {
                return function(d) {
                    var url = "";
                    if(d.slug != "") {
                        url = d.slug
                    } //else if(d.type == 2) {
                        //url = "clients/" + d.slug
                    //} else if(d.type == 3) {
                        //url = "agencies/" + d.slug
                    //}
                    window.open("//"+url)
                }
            }
                
        
            
        
            var node = vis.selectAll("g.node")
                .data(data.nodes)
              .enter().append("svg:g")
                .attr("class", "node")
                .call(force.drag);
        
            
            node.append("circle")
                .attr("class", function(d){ return "node type"+d.type})
                .attr("r",function(d){if(d.entity == "description"){ return 6 } else { return 18 }})
                //.on("mouseover", expandNode);
                //.style("fill", function(d) { return fill(d.type); })
                
                        
        
            node.append("svg:image")
                .attr("class", function(d){ return "circle img_"+d.name })
                .attr("xlink:href", function(d){ return d.img_hrefD})
                .attr("x", "-36px")
                .attr("y", "-36px")
                .attr("width", "70px")
                .attr("height", "70px")
                .on("click", openLink())
                .on("mouseover", function (d) { if(d.entity == "company")
                                                    {
                        d3.select(this).attr("width", "90px")
                                        .attr("x", "-46px")
                                        .attr("y", "-36.5px")
                                       .attr("xlink:href", function(d){ return d.img_hrefL});                           
                                                    }
                    })
                .on("mouseout", function (d) { if(d.entity == "company")
                                                {
                        d3.select(this).attr("width", "70px")
                                        .attr("x", "-36px")
                                        .attr("y", "-36px")
                                       .attr("xlink:href", function(d){ return d.img_hrefD});
                                                }
                    });    
                    
        
            node.append("text")
                .attr("class", function(d){ return "nodetext title_"+d.name })
                .attr("dx", 0)
                .attr("dy", ".35em")
                .style("font-size","10px")
                .attr("text-anchor", "middle")
                .style("fill", "white")
                .text(function(d) { if (d.entity != "description"){return d.name} });
                
                

            node.on("mouseover", function (d) {
                if (d.entity == "company"){   
                    d3.select(this).select('text')
                        .transition()
                        .duration(300)
                        .text(function(d){
                                return d.full_name;
                            })
                        .style("font-size","15px")
                        
                }
                else if(d.entity == "employee"){
                    var asdf = d3.select(this);
                    asdf.select('text').remove();
                    
                    asdf.append("text")
                                .text(function(d){return d.prefix + ' ' + d.fst_name })
                                .attr("class","nodetext")
                                .attr("dx", 0)
                                .attr("dy", ".35em")
                                .style("font-size","5px")
                                .attr("text-anchor", "middle")
                                .style("fill", "white")
                                .transition()
                                .duration(300)
                                .style("font-size","12px");
                    
                    asdf.append("text").text(function(d){return d.snd_name })
                                .attr("class","nodetext")
                                .attr("transform","translate(0, 12)")
                                .attr("dx", 0)
                                .attr("dy", ".35em")
                                .style("font-size","5px")
                                .attr("text-anchor", "middle")
                                .style("fill", "white")
                                .transition()
                                .duration(300)
                                .style("font-size","12px");                                         
                }
                else {
                    d3.select(this).select('text')
                        .transition()
                        .duration(300)
                        .style("font-size","15px")
                }
                        
                if (d.entity == "company") {
                    d3.select(this).select('image')
                        .attr("width", "90px")
                        .attr("x", "-46px")
                        .attr("y", "-36.5px")
                        .attr("xlink:href", function (d) {
                            return d.img_hrefL
                            });               
                }
                
                if (d.entity == "company") {
                
                    d3.select(this).select('circle')
                                    .transition()
                                    .duration(300)
                                    .attr("r",28)
                                    
                }
                else if (d.entity == "employee"){
                    d3.select(this).select('circle')
                                    .transition()
                                    .duration(300)
                                    .attr("r",32)
                }
            })
            
             
             node.on("mouseout", function (d) {
                if (d.entity == "company") {
                    d3.select(this).select('text')
                        .transition()
                        .duration(300)
                        .text(function(d){return d.name;})
                        .style("font-size","10px")
                    }
                else if(d.entity == "employee"){
                    ///////////////////////////
                    // CHANGE
                    ///////////////////////////
                    
                    d3.select(this).selectAll('text').remove();
                    
                    //d3.select(this).select('text')
                    d3.select(this).append('text')
                        .text(function(d){return d.name;})
                        .style("font-size","14px")  
                        .attr("dx", 0)
                        .attr("dy", ".35em")
                        .attr("text-anchor", "middle")
                        .style("fill", "white")
                        .attr("class","nodetext")
                        .transition()
                        .duration(300)
                        .style("font-size","10px")
                    
                }
                else {
                    d3.select(this).select('text')
                        .transition()
                        .duration(300)
                        .style("font-size","10px")
                }
                        
                    
                 if (d.entity == "company") {
                    d3.select(this).select('image')
                        .attr("width", "70px")
                        .attr("x", "-36px")
                        .attr("y", "-36px")
                        .attr("xlink:href", function (d) {
                        return d.img_hrefD
                    });
                }
                
                if (d.entity == "company" || d.entity == "employee") {
                
                    d3.select(this).select('circle')
                                    .transition()
                                    .duration(300)
                                    .attr("r",18)
                }
                
            });
        
            force.on("tick", function() {
              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("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
            });
        //});

CSS:

@charset "utf-8";
/* CSS Document */

.link10 { stroke: #ccc; stroke-width: 2px; stroke-dasharray: 3, 3; }
.link1 { stroke: #000; stroke-width: 2px;}
.nodetext { pointer-events: none;}

.node.type1 {
  fill:#690011;
}
.node.type2 {
  fill:#BF0426;
}
.node.type3 {
  fill:#E5B96F;
}
.node.type4 {
  fill:#FFFFFF;
  stroke:#1695A3; 
  stroke-width: 3px;
}

.node.type5 {
    fill:#1BC9E0;
}

.node.type6 {
    fill:#E01B98;
}

image.circle {
    cursor:pointer;
}

.fadein{
display:none;
font-size:20px;
}

.rectD{
background-color:#000000;
width:70px;
height:30px
}

.rectL{
background-color:#000000;
width:90px;
height:30px
}

You can edit and see working example in my linked jsfiddle..

Any suggestion or help is welcome..

1条回答
一纸荒年 Trace。
2楼-- · 2020-07-10 12:13

The way I solved this problem in my own project was to examine the links to see if their source or target properties matched the hovered node. This should be a step in the right direction.

// On node hover, examine the links to see if their
// source or target properties match the hovered node.
node.on('mouseover', function(d) {
  link.style('stroke-width', function(l) {
    if (d === l.source || d === l.target)
      return 4;
    else
      return 2;
    });
});

// Set the stroke width back to normal when mouse leaves the node.
node.on('mouseout', function() {
  link.style('stroke-width', 2);
});

Updated fiddle: http://jsfiddle.net/2pdxz/2/

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