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customer segment diagram background #2

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customer segment diagram background #2

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0 example/circle-and-line/.block → LICENSE.md
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138 changes: 138 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">

<title>Customer segment diagram</title>
<script src="https://d3js.org/d3.v4.min.js"></script>
<style>

body {
margin: 0 0 0 0;
position: fixed;
left: 0px;
right: 0px;
top: 0px;
bottom: 0px;
}

svg {
width:100%;
height:100%;
}

#header {
display: flex;
height:50px;
align-self: center;
align-items: center;
background-color: lightgrey;
padding-left: 10px;
margin : 20px 20px 20px 20px;
}

</style>
</head>
<body>
<div id='header'>Customer Segment</div>
<svg></svg>
<script>
const hearderDiv = document.getElementById('header');
const hearderWidth = hearderDiv.clientWidth;
const hearderHeight = hearderDiv.clientHeight;
const margin = 20 + 1; //20 from #header style,+1 for padding

// initialize
const svg = d3.select('svg'),
bigCircle = svg.append('circle'),
smallCircle = svg.append('circle'),
lineGraph1 = svg.append('path'),
lineGraph2 = svg.append('path'),
lineGraph3 = svg.append('path');

function draw(){
//calculate the center (cx,cy) of the circles
//height = 1/2* (window height - header height - margin)
const cx = window.innerWidth/2;
const cy = window.innerHeight/2 - hearderHeight/2 - margin;

// angles for lines 2 and 3
const cos1 = Math.cos(45);
const sin1 = Math.sin(45);
const cos2 = Math.cos(-45);
const sin2 = Math.sin(-45);

let bigR; //big radius
if(cx>cy){ // right radius when resizing
bigR = cy;
} else{
bigR = cx;
}
const smallR = (bigR-1)*0.1; //small radius 10% of the big one

smallCircle
.attr('cx', cx)
.attr('cy', cy)
.attr('r',smallR)
.attr('stroke', 'steelblue')
.style('fill', 'none');

bigCircle
.attr('cx', cx)
.attr('cy', cy)
.attr('r', bigR-1) //-1 for styling reasons
.attr('stroke', 'steelblue')
.style('fill', 'none');

//the three lines of the form y1-y0 = dy/dx(x1-xo)
//with [{x0: ...,yo: ...},{x1: ...,y1: ...}]
// offsets -0.5,+1,+1.5 and -2.5 are for styling reasons
const lineData = [
[
{ 'x': cx - smallR - 0.5, 'y': cy },
{ 'x': cx - bigR + 1.5, 'y': cy }
],
[
{ 'x': cx + cos2*smallR + 1, 'y': cy - sin2*smallR },
{'x': cx + cos2*bigR - 2.5 , 'y': cy - sin2*bigR }
],
[
{ 'x': cx + cos1*smallR + 1, 'y': cy - sin1*smallR },
{ 'x': cx + cos1*bigR - 2.5 , 'y': cy - sin1*bigR }
]
];

//This is the accessor function we talked about above
const lineFunction = d3.line()
.x(function(d) { return d.x; })
.y(function(d) { return d.y; });

//The lines SVG Path we draw
lineGraph1
.attr('d', lineFunction(lineData[0]))
.attr('stroke', 'red')
.attr('stroke-width', 2)
.attr('fill', 'none');

lineGraph2
.attr('d', lineFunction(lineData[1]))
.attr('stroke', 'red')
.attr('stroke-width', 2)
.attr('fill', 'none');

lineGraph3
.attr('d', lineFunction(lineData[2]))
.attr('stroke', 'red')
.attr('stroke-width', 2)
.attr('fill', 'none');
}

// Draw for the first time to initialize.
draw();
// Redraw based on the new size whenever the browser window is resized.
window.addEventListener("resize", draw);

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