5.2 scatter plot | mouse events

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<head>

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<script src="https://d3js.org/d3.v3.min.js"></script>

<p id="h1">MOUSE EVENTS </p>
<div id="link">by
<a href="https://slides.com/sandravizmad">SANDRA</a></div>

<style>

/*Defining text stylings*/

#h1 {
  font-size:30px;
  margin:30px 0px 0px 20px;
  color:#f5fa91;
  font-family: 'Montserrat Alternates', sans-serif;
  font-weight:300;
}

#link {
	font-family:'Montserrat Alternates', sans-serif;
  font-weight:200;
  font-size:10px;
	margin:5px 0px 0px 22px;
  color:white;
}

a:link, a:visited, a:active {
	text-decoration: none;
  color:white;
  border-bottom:1.5px dotted white;
}

body {
  background-color:#011227;
}

/*Defining chart stylings*/

circle{
   fill:#85f6fa;
   opacity:0.9;
}

circle:hover{
   fill:#f5fa91;
   opacity:1;
}

/*Defining axis stylings*/

.y-axis text, .x-axis text {
  font-family:'Montserrat Alternates', sans-serif;
  font-weight:100;
  font-size:13px;
  opacity:1;
  fill:white;
}

.y-axis path {
  fill:none;
  stroke-width:0;
  stroke-opacity:1;
  stroke:white;
}

.x-axis path {
  fill:none;
  stroke-width:0;
  stroke-opacity:1;
  stroke:white;
}

.y-axis line, .x-axis line {
  fill:none;
  stroke-width:0;
  stroke-opacity:1;
  stroke:white;
  stroke-dasharray:2;
}

</style>
</head>

//Margin conventions
var m = {top:100, right:50, bottom:50, left:40}
    w = 700 - m.left - m.right,
    h = 700 - m.top - m.bottom;

//Container
var svg = d3.select("body")
    .append("svg")
    .attr("width", w + m.left + m.right)
    .attr("height", h + m.top + m.bottom)
    .append("g")
    .attr("transform", `translate(${m.left}, ${m.top})`);

//Random dataset
var data = [
        { x: 100, y: 110 },
        { x: 83, y: 43 },
        { x: 92, y: 28 },
        { x: 49, y: 74 },
        { x: 51, y: 10 },
        { x: 25, y: 98 },
        { x: 77, y: 30 },
        { x: 20, y: 83 },
        { x: 11, y: 63 },
        { x:  4, y: 55 },
        { x:  0, y:  0 },
        { x: 85, y: 100 },
        { x: 60, y: 40 },
        { x: 70, y: 80 },
        { x: 10, y: 20 },
        { x: 40, y: 50 },
        { x: 25, y: 31 }];

//X scale
var x = d3.scale.linear()
    .domain([0, d3.max(data, d => d.x)])
    .range([0, w]);;

//Y scale
var y = d3.scale.linear()
    .domain([0, d3.max(data, d => d.y)])
    .range([h, 0]);

//Calling x axis
svg.append("g")
    .attr("class","x-axis")
    .attr("transform",`translate(0, ${h})`)
    .call(d3.svg.axis()
              .scale(x)
              .orient("Bottom"));

//Calling y axis
svg.append("g")
    .attr("class","y-axis")
    .attr("transform",`translate(0, 0)`)
    .call(d3.svg.axis()
              .scale(y)
              .orient("left"));

//Define the circle attributes
var circleAttrs = {
          cx : d => x(d.x),
          cy : d => y(d.y),
          r : 30
        };

//Data binding + attributes + interactivity
svg.selectAll("circle")
     .data(data)
     .enter()
     .append("circle")
     .attr(circleAttrs)
     .on("mouseover", MouseOver)
     .on("mouseout", MouseOut);

//Define mouseover
function MouseOver(d) {

d3.select(this)
     .attr("r", 30)
     .style("fill", "#f5fa91");
}

//Define mouseout
function MouseOut(d) {

d3.select(this)
   .attr("r", 20)
   .style("fill", "#FC77AD");
}

</script>
</body>
</html>

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