d3noob/.block

## .block
license: mit

## README.md

      
    Raw
  

              README.md
            
          
    This is a simple example of implimenting an HTML input using a <number> input tag and using that to adjust a d3.js drawn svg element (rotate text).
It is used as an example and described in the book D3 Tips and Tricks.

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

<p>
  <label for="nValue"
         style="display: inline-block; width: 240px; text-align: right">
         angle = <span id="nValue-value"></span>
  </label>
  <input type="number" min="0" max="360" step="5" value="0" id="nValue">
</p>

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.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 element
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 value
d3.select("#nValue").on("input", function() {
  update(+this.value);
});

// Initial update value
update(0);

// adjust the text
function update(nValue) {

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

</script>

## thumbnail.png

      
    Raw
  

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

	<p>
	<label for="nValue"
	style="display: inline-block; width: 240px; text-align: right">
	angle = <span id="nValue-value"></span>
	</label>
	<input type="number" min="0" max="360" step="5" value="0" id="nValue">
	</p>

	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.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 element
	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 value
	d3.select("#nValue").on("input", function() {
	update(+this.value);
	});

	// Initial update value
	update(0);

	// adjust the text
	function update(nValue) {

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

	</script>