D3.js - 为什么鼠标悬停和鼠标输出为每个孩子元素? [英] D3.js - why mouseover and mouse out fired for each child elements?
问题描述
我使用d3.js在圆圈中间生成带有文字标志的svg圆圈。
这是svg结果。
< g id =main>
< circle r =114fill =#F0E8D0>< / circle>
< text text-anchor =middle>电影标题< / text>
< / g>
这里是d3.js
var circles = [{r:innerRadius}];
svg.append(g)。attr(id,main);
svg.select(#main)。selectAll(circle)
.data(circles).enter()
.append )
.attr(r,function(d){return dr})
.attr(fill,#F0E8D0);
svg.select(#main)。append(text)
.attr(text-anchor,middle)
.text ){returnThe movie title;});
当鼠标悬停并离开圆形时,我还想启动一些动画。
svg.select(#main)
因此问题是:
.on(mouseover,function(){
//转换代码
})。on(mouseout,function(){
// transition for transition
})
当鼠标移动到圆圈中时,动画会按照预期的方式触发,然而,当鼠标触摸文本元素时, mouseout事件触发(鼠标离开圆圈),然后再次发生mouseover事件(鼠标进入文本元素),这是不可取的。
看起来当鼠标触摸< g>标签的任何子元素时,动画回调将被调用。
当鼠标触摸文本元素时,我不想要任何动画发生。
解决方案您可以阻止
text
元素通过将指针事件
设置为无接收鼠标事件(从而触发mouseout事件触发) >:
svg.select(#main)append(text)
.attr文本锚,中间)
.attr(pointer-events,none)
.text(function(){returnThe movie title;});
您可能还想在
圆上设置事件
而不是g
元素:svg.select (#main)。selectAll(circle)
.data(circles).enter()
.append(circle)
.attr(r,function d){return dr})
.attr(fill,#F0E8D0)
.on(mouseover,function(){
// transition for transition
})
.on(mouseout,function(){
// transition for transition
})
I use d3.js to generate a svg circle with a text logo in mid of the circle. Here is the svg result.
<g id="main"> <circle r="114" fill="#F0E8D0"></circle> <text text-anchor="middle">The movie title</text> </g>
Here is the d3.js
var circles = [{r: innerRadius}]; svg.append("g").attr("id","main"); svg.select("#main").selectAll("circle") .data(circles).enter() .append("circle") .attr("r",function(d){return d.r}) .attr("fill","#F0E8D0"); svg.select("#main").append("text") .attr("text-anchor", "middle") .text(function(){ return "The movie title";});
I also want to fire some animations when mouse hover and leave the circle.
svg.select("#main") .on("mouseover",function(){ //code for transition }).on("mouseout",function(){ //code for transition })
So the problem is: When mouse moves into the circle, the animation fires as expected, however, when mouse touches the text element, a mouseout event fires (mouse leaving the circle), followed by a mouseover event again (mouse entering the text element), which is not desirable.
It seems that the animation callbacks will be called when mouse touches any child element of the "< g >" tag.
I do not want any animation happen when mouse touches the text element. How can I do it?
解决方案You can prevent the
text
element receiving mouse events (and thus a mouseout event triggering when you move the mouse over it) by settingpointer-events
tonone
:svg.select("#main").append("text") .attr("text-anchor", "middle") .attr("pointer-events", "none") .text(function(){ return "The movie title";});
You probably also want to set the events on the
circle
and not on theg
element:svg.select("#main").selectAll("circle") .data(circles).enter() .append("circle") .attr("r",function(d){return d.r}) .attr("fill","#F0E8D0") .on("mouseover",function(){ //code for transition }) .on("mouseout",function(){ //code for transition })
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