d3noob/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    This is a demonstration of the use of the html 'range' input  to rotate a text element using d3.js v5.
This graph is part of the code samples for the update to the book D3 Tips and Tricks to version 5 of d3.js.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<title>Input test</title>

<p>
  <label for="nAngle"
     style="display: inline-block; width: 240px; text-align: right">
     angle = <span id="nAngle-value">…</span>
  </label>
  <input type="range" min="0" max="360" id="nAngle">
</p>

<script src="https://d3js.org/d3.v5.min.js"></script>
<script>

var width = 600;
var height = 300;

var holder = d3.select("body")
      .append("svg")
      .attr("width", width)
      .attr("height", height);

// draw the text
holder.append("text")
  .style("fill", "black")
  .style("font-size", "56px")
  .attr("dy", ".35em")
  .attr("text-anchor", "middle")
  .attr("transform", "translate(300,150) rotate(0)")
  .text("d3noob.org");

// when the input range changes update the angle
d3.select("#nAngle").on("input", function() {
  update(+this.value);
});

// Initial starting angle of the text
update(0);

// update the element
function update(nAngle) {

  // adjust the text on the range slider
  d3.select("#nAngle-value").text(nAngle);
  d3.select("#nAngle").property("value", nAngle);

  // rotate the text
  holder.select("text")
    .attr("transform", "translate(300,150) rotate("+nAngle+")");
}

</script>

## thumbnail.png

      
    Raw
  

              thumbnail.png
	<!DOCTYPE html>
	<meta charset="utf-8">
	<title>Input test</title>

	<p>
	<label for="nAngle"
	style="display: inline-block; width: 240px; text-align: right">
	angle = <span id="nAngle-value">…</span>
	</label>
	<input type="range" min="0" max="360" id="nAngle">
	</p>

	<script src="https://d3js.org/d3.v5.min.js"></script>
	<script>

	var width = 600;
	var height = 300;

	var holder = d3.select("body")
	.append("svg")
	.attr("width", width)
	.attr("height", height);

	// draw the text
	holder.append("text")
	.style("fill", "black")
	.style("font-size", "56px")
	.attr("dy", ".35em")
	.attr("text-anchor", "middle")
	.attr("transform", "translate(300,150) rotate(0)")
	.text("d3noob.org");

	// when the input range changes update the angle
	d3.select("#nAngle").on("input", function() {
	update(+this.value);
	});

	// Initial starting angle of the text
	update(0);

	// update the element
	function update(nAngle) {

	// adjust the text on the range slider
	d3.select("#nAngle-value").text(nAngle);
	d3.select("#nAngle").property("value", nAngle);

	// rotate the text
	holder.select("text")
	.attr("transform", "translate(300,150) rotate("+nAngle+")");
	}

	</script>