悬停时修改线/工具提示 [英] Modify lines/tooltip on hover
本文介绍了悬停时修改线/工具提示的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在玩D3.js，我想做两件事：
I am playing around with D3.js and I am trying to do two things:
- 在鼠标悬停的时候以应用线条的样式（颜色为浅蓝色或某物）。它可以去父节点，或最高级的父级，任何一个会大大帮助我。
- 在每个节点悬停文本时，我想在JSON数据中显示test属性的工具提示。
我之前遇到过工具提示，但在这种情况下，我不知道将 ，on（mouseover事件处理程序，这也是我第一次测试出 d3.tree 选项。
I have messed around with the tooltips before, but in this scenario I am not sure where to put the ,on("mouseover" event handler. This is also my first time testing out the d3.treeoption.
var margin = {top: 20, right: 120, bottom: 20, left: 120},
width = 960 - margin.right - margin.left,
height = 800 - margin.top - margin.bottom;
var i = 0,
duration = 750,
root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var root={ //json var root
"name": "flare",
"test": "blue",
"children": [{
"name": "analytics",
"test": "red",
"children": [{
"name": "cluster",
"test": "green",
"children": [{
"name": "AgglomerativeCluster",
"test": "blue",
"size": 3938
}, {
"name": "CommunityStructure",
"test": "yellow",
"size": 3812
}, {
"name": "HierarchicalCluster",
"test": "orange",
"size": 6714
}, {
"name": "MergeEdge",
"test": "someColor",
"size": 743
}]
}, {
"name": "graph",
"test": "someColor",
"children": [{
"name": "BetweennessCentrality",
"test": "someColor",
"size": 3534
}, {
"name": "LinkDistance",
"test": "someColor",
"size": 5731
}, {
"name": "MaxFlowMinCut",
"size": 7840
}, {
"name": "ShortestPaths",
"test": "someColor",
"size": 5914
}, {
"name": "SpanningTree",
"test": "someColor",
"size": 3416
}]
}, {
"name": "optimization",
"test": "someColor",
"children": [{
"name": "AspectRatioBanker",
"test": "someColor",
"size": 7074
}]
}]
}, {
"name": "animate",
"test": "someColor",
"children": [{
"name": "interpolate",
"test": "someColor",
"children": [{
"name": "ArrayInterpolator",
"test": "someColor",
"size": 1983
}, {
"name": "ColorInterpolator",
"test": "someColor",
"size": 2047
}, {
"name": "DateInterpolator",
"test": "someColor",
"size": 1375
}, {
"name": "Interpolator",
"test": "someColor",
"size": 8746
}, {
"name": "MatrixInterpolator",
"test": "someColor",
"size": 2202
}, {
"name": "NumberInterpolator",
"test": "someColor",
"size": 1382
}, {
"name": "ObjectInterpolator",
"test": "someColor",
"size": 1629
}, {
"name": "PointInterpolator",
"test": "someColor",
"size": 1675
}, {
"name": "RectangleInterpolator",
"test": "someColor",
"size": 2042
}]
}, {
"name": "ISchedulable",
"test": "someColor",
"size": 1041
}, {
"name": "Parallel",
"test": "someColor",
"size": 5176
}, {
"name": "Pause",
"test": "someColor",
"size": 449
}, {
"name": "Scheduler",
"test": "someColor",
"size": 5593
}, {
"name": "Sequence",
"test": "someColor",
"size": 5534
}, {
"name": "Transition",
"test": "someColor",
"size": 9201
}, {
"name": "Transitioner",
"test": "someColor",
"size": 19975
}, {
"name": "TransitionEvent",
"test": "someColor",
"size": 1116
}, {
"name": "Tween",
"test": "someColor",
"size": 6006
}]
}, {
"name": "data",
"test": "someColor",
"size": 4322
}]
} ;
root.x0 = height / 2;
root.y0 = 0;
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
root.children.forEach(collapse);
update(root);
d3.select(self.frameElement).style("height", "800px");
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
.on("click", click);
nodeEnter.append("circle")
.attr("r", 1e-6)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeEnter.append("text")
.attr("x", function(d) { return d.children || d._children ? -10 : 10; })
.attr("dy", ".35em")
.attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
.text(function(d) { return d.name; })
.style("fill-opacity", 1e-6);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
nodeUpdate.select("circle")
.attr("r", 4.5)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
.node text {
font: 10px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
推荐答案
首先，你可以改变线条的颜色a href =https://developer.mozilla.org/en-US/docs/Web/CSS/:hover =nofollow> CSS hover ，如下所示：
First, you can change the color of the lines (links) just using a simple CSS hover, like so:
.link:hover {
stroke:blue;
}
这会将鼠标悬停为蓝色或悬停。
This will turn the links blue on mouse over or hover.
其次，添加工具提示稍微复杂一点。一种方法是在您的网页上有一个隐藏的< div> 变为可见，并移动到< text> 你正在滑过。当鼠标出来时，它将被隐藏。为此，添加以下内容：
Second, adding tooltips is slightly more complicated. One way is to have a hidden <div> on your page that becomes visible and moves to the <text> you are mousing over. It will then be hidden when you mouse out. To do so, add the following:
nodeEnter.on("mouseover", function (d) {
var r = d3.select(this).node().getBoundingClientRect();
d3.select("div#tooltip")
.style("display", "inline")
.style("top", (r.top-25) + "px")
.style("left", r.left + "px")
.style("position", "absolute")
.text(d.test);
})
.on("mouseout", function(){
d3.select("div#tooltip").style("display", "none")
});
这需要您添加< div id =tooltip =display：none>< / div> 到您的HTML页面。要使工具提示稍微看一些工具提示，请使用以下CSS（我相信你可以Google围绕，并获得更好的风格）：
This requires you to add the <div id="tooltip" style="display:none"></div> to your HTML page. To make the tooltip look slightly more tooltip-y, use the following CSS (I'm sure you can Google around and get an even better style):
div#tooltip{
color:#ffffff;
background:#000000;
opacity:1;
padding:5px;
}
我在这个小提琴。
这篇关于悬停时修改线/工具提示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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