I have a problem with appending text to my SVG in d3. What I want to achieve is for text to appear in the red circle as displayed in this image: Circle d3 graph .
For some reason I cannot make the text display and after spending a few hours on this I really don't have any ideas how to solve this... I found a few similar questions on SO but nothing helped me to solve this...
Here are the fragments of the code that I think are crucial to solve this problem:
.on("mousemove", function (d) {
svg.select("text.text-tooltip1")
.text(function(d){
return d3.time.format("%B %d, %Y")(d["data"]);
})
svg.select("text.text-tooltip2")
.text(function(d){
return "PM emmision:" + d3.round(x(d["ug_mean"]),2);
})
svg.select("text.text-tooltip3")
.text(function(d){
return "Benzen emmision:" + d3.round(x(d["Precipitationmm"]),2);
})
})
and
svg.append("circle")
.attr("class", "exp")
.attr("cx", 0)
.attr("cy", 0)
.attr("r", 130)
.attr("fill", "#e74747")
.attr("opacity", "0.8");
svg.append("text")
.attr("class", "text-tooltip1")
.attr("dy", "-2em")
.style("text-anchor", "middle")
.attr("class", "data");
svg.append("text")
.attr("class", "text-tooltip2")
.attr("dy", "1.5em")
.style("text-anchor", "middle")
.attr("class", "data");
svg.append("text")
.attr("z-index", 100)
.attr("class", "text-tooltip3")
.attr("dy", "2.5em")
.style("text-anchor", "middle")
.attr("class", "data");
And here is full code on Plunkr: https://plnkr.co/edit/b6PjicI0vOoYSHaDnWS0?p=preview
Thanks a lot for your help!
You need to make two small changes. First, when you append the <text>
elements, you are setting class
twice. But the second time overwrites the first, so those elements don't have the .text-tooltipN
class you expect them to have. In D3 v4, you can use .classed('class-name', true)
multiple times without overwriting other classes, but it's easier to just set all at once:
svg.append("text")
.attr("class", "data text-tooltip1")
.attr("dy", "-2em")
.style("text-anchor", "middle");
Second, you don't need two functions inside the mouse event -- notice that you're nesting two cases of function(d){}
which means d
no longer has the value you want:
.on("mousemove", function (d) {
svg.select("text.text-tooltip1")
.text(d3.time.format("%B %d, %Y")(d["data"]))
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