javascript D3.js 在鼠标悬停时更改文本，这可能吗？
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D3.js change text on mouseover, is it possible?
提问by dzordz
I have a force-directed graph, and I wanna to change text in the nodes on mouse over. I have tried to do this with placing a data of "full_name":in data array and then calling it on mouseover like I'm calling it for blue rectangle images. But it does not seems to work it and I'm not getting any error. So I don't know what is the problem..
我有一个力导向图，我想在鼠标悬停时更改节点中的文本。我试图通过"full_name":在数据数组中放置一个数据然后在鼠标悬停时调用它来做到这一点，就像我为蓝色矩形图像调用它一样。但它似乎不起作用，我没有收到任何错误。所以我不知道是什么问题..
You can see and edit example here: http://jsfiddle.net/dzorz/CqaLh/
您可以在此处查看和编辑示例：http: //jsfiddle.net/dzorz/CqaLh/
and script looks like this:
和脚本看起来像这样：
var data = {"nodes":[
{"name":"Action 1", "type":2, "slug": "", "entity":"employee" },
{"name":"Action 2", "type":3, "slug": "", "entity":"employee" },
{"name":"Action 4", "type":5, "slug": "", "value":265000, "entity":"employee"},
{"name":"Action 5", "type":6, "slug": "", "value":23000, "entity":"employee"},
{"name":"Action 3", "type":4, "slug": "", "value":115000, "entity":"employee"},
{"name":"YHO", "full_name":"Yahoo", "type":1, "slug": "www.yahoo.com", "entity":"company", "img_hrefD":"http://img4host.net/upload/30143226522090da3be7a.jpg", "img_hrefL":"http://img4host.net/upload/30145118522095467b7e3.jpg"},
{"name":"GGL", "full_name":"Google", "type":1, "slug": "www.google.com", "entity":"company", "img_hrefD":"http://img4host.net/upload/30143226522090da3be7a.jpg", "img_hrefL":"http://img4host.net/upload/30145118522095467b7e3.jpg" },
{"name":"BNG", "full_name":"Bing", "type":1, "slug": "www.bing.com", "entity":"company", "img_hrefD":"http://img4host.net/upload/30143226522090da3be7a.jpg", "img_hrefL":"http://img4host.net/upload/30145118522095467b7e3.jpg" },
{"name":"YDX", "full_name":"Yandex", "type":1, "slug": "", "entity":"company", "img_hrefD":"http://img4host.net/upload/30143226522090da3be7a.jpg", "img_hrefL":"http://img4host.net/upload/30145118522095467b7e3.jpg" }
],
"links":[
{"source":0,"target":3,"value":10},
{"source":4,"target":3,"value":1},
{"source":1,"target":7,"value":10},
{"source":2,"target":4,"value":10},
{"source":4,"target":7,"value":1},
{"source":4,"target":5,"value":10},
{"source":4,"target":6,"value":10},
{"source":8,"target":4,"value":1}
]
}
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", 25 + 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)
.distance(150)
.charge(-1000)
.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 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) { return radius(d.value) || 10 })
//.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("svg:text")
.attr("class", function(d){ return "nodetext title_"+d.name })
.attr("dx", 0)
.attr("dy", ".35em")
.attr("text-anchor", "middle")
.style("fill", "white")
.text(function(d) { return d.name })
.on("mouseover", function (d) { if(d.entity == "company"){
d3.select(this).text(function(d) { return d.full_name })
}
});
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:
css：
@charset "utf-8";
/* CSS Document */
.link10 { stroke: #ccc; stroke-width: 3px; stroke-dasharray: 3, 3; }
.link1 { stroke: #000; stroke-width: 3px;}
.nodetext { pointer-events: none; font: 14px sans-serif; font-weight:bold;}
.node.type1 {
fill:brown;
}
.node.type2 {
fill:#337147;
}
.node.type3 {
fill:blue;
}
.node.type4 {
fill:red;
}
.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
}
Is it even possible to change the text after everything is loaded?
加载所有内容后甚至可以更改文本吗？
Please help
请帮忙
回答by Dick Fox
Each node had an image and a text element associated with it. The mouseover events for the image and the text element were interfering with each other, since they occupy the same space.
每个节点都有一个图像和一个与之关联的文本元素。图像和文本元素的鼠标悬停事件相互干扰，因为它们占据相同的空间。
I forked your jsfiddle and created a single mouseover listener for the node and to put both events in the same function:
我分叉了你的 jsfiddle 并为节点创建了一个鼠标悬停侦听器，并将两个事件放在同一个函数中：
node.on("mouseover", function (d) {
d3.select(this).select('text')
.text(function(d){
return d.full_name;
})
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
});
}
});
(there's a similar listener on node for mouseout to reverse these changes).
（节点上有一个类似的侦听器，用于 mouseout 来反转这些更改）。
