I am currently working with a D3 bullet chart example and trying to enhance it by incorporating different colors for the ranges directly into the JSON file. The link to the original example can be found here: . I need this customization because I require dynamic color variations based on specific criteria.
A similar issue was discussed in the forum previously, but unfortunately, it remained unresolved. It's worth mentioning that I am relatively new to d3 and lack extensive experience in JavaScript programming.
Below is the section of JSON code I am using. The "rangecolor" parameter will eventually be an array containing multiple colors to represent various ranges, but for now, I am only experimenting with one color:
{
"title":"Memory Used",
"subtitle":"MBytes",
"ranges":[256,512,1024],
"rangecolor": "red",
"measures":[768],
"markers":[900]
}
To gain better insight into how to implement this, I referred to a functional example for setting up the title:
var title = svg.append("g")
.style("text-anchor", "end")
.attr("transform", "translate(-6," + height / 2 + ")");
title.append("text")
.attr("class", "title")
.text(function(d) { return d.title; });
Despite my efforts, I have been encountering difficulties making the following code snippet work:
d3.selectAll(".bullet .range.s0") .style("fill", function(d) { return d.rangecolor; });
On the other hand, the following modification does yield the desired outcome:
d3.selectAll(".bullet .range.s0")
.style("fill", function(d) { return "red"; });
Additionally, I have managed to extract the value of "rangecolor" and display it within the title element:
title.append("text")
.attr("class", "title")
.text(function(d) { return d.rangecolor; }); //works - title is now "red"
I may be approaching this problem incorrectly, so any guidance on effectively integrating color ranges into the JSON data and utilizing them would be greatly appreciated.