CODEWITHSUNDEEP
htmlcssd3.jssvg
iskandarblue
iskandarblue

Reputation: 7526

Align text within d3 svg

I am having trouble with a simple task in d3 as I am new to the library.

Using the gradient example, I've inserted a linear gradient into the footer div element:

    #footer {
      position: absolute;
      z-index: 10;
      bottom: 10px;
      left: 50%;
      width: 300px;
      margin-left: -150px;
      height: 20px;
      border: 2px solid black;
      background: rgba(12, 12, 12, 0.8);
      color: #eee;
    }

var svg = d3.select("footer")
    .append("svg:svg")
    .attr("width", 300)//canvasWidth)
    .attr("height", 20);

svg.append("rect")
    .attr("width", 300)
    .attr("height", 20)
    .style("fill", "url(#linear-gradient)");

var defs = svg.append("defs");


var linearGradient = defs.append("linearGradient")
    .attr("id", "linear-gradient");

linearGradient.append("stop")
.attr("offset", "0%")
.attr("stop-color", "#ffa474"); 

linearGradient.append("stop")
    .attr("offset", "100%")
    .attr("stop-color", "#8b0000");

enter image description here

how would one insert text "a" and "b" on either side of the gradient so that the text is within the bar and aligned to the left and right sides, while appearing above the color? I have tried adding text in the div element but this only "pushes" aside the gradient bar

Upvotes: 6

Views: 12111

Answers (1)

Gerardo Furtado
Gerardo Furtado

Reputation: 102174

You can position your text elements using text-anchor. For the first text, set text-anchor to start. For the last one, set text-anchor to end:

svg.append("text")
    .attr("text-anchor", "start")
    .attr("x", 4)//padding of 4px
    .attr("y", 14)
    .text("a");

svg.append("text")
    .attr("text-anchor", "end")
    .attr("x", 296)//padding of 4px
    .attr("y", 14)
    .text("b");

Here is a demo:

var svg = d3.select("#footer")
    .append("svg:svg")
    .attr("width", 300)//canvasWidth)
    .attr("height", 20);
		
var defs = svg.append("defs");

var linearGradient = defs.append("linearGradient")
    .attr("id", "linear-gradient");

linearGradient.append("stop")
.attr("offset", "0%")
.attr("stop-color", "#ffa474"); 

linearGradient.append("stop")
    .attr("offset", "100%")
    .attr("stop-color", "#8b0000");

svg.append("rect")
    .attr("width", 300)
    .attr("height", 20)
    .style("fill", "url(#linear-gradient)");
		
svg.append("text")
	.attr("text-anchor", "start")
	.attr("x", 4)
	.attr("y", 14)
	.text("a");
	
svg.append("text")
	.attr("text-anchor", "end")
	.attr("x", 296)
	.attr("y", 14)
	.text("b");
#footer {
      position: absolute;
      z-index: 10;
      bottom: 10px;
      left: 50%;
      width: 300px;
      margin-left: -150px;
      height: 20px;
      border: 2px solid black;
      background: rgba(12, 12, 12, 0.8);
      color: #eee;
    }
<script src="https://d3js.org/d3.v4.min.js"></script>
<div id="footer"></div>

Upvotes: 12

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