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barankos.html
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<html>
<head>
<title>Barankos</title>
</head>
<body>
<div class="container">
<div class="svg-container">
<svg xmlns="http://www.w3.org/2000/svg" x="1000" y="1000" viewBox="0 0 1000 1000" preserveAspectRatio="xMinYMin">
<g transform="translate(500 500)" id="svg-path-group"></g>
</svg>
</div>
</div>
<div id="messages"></div>
<style>
html {
height: 100%;
}
body {
height: 100%;
}
.container {
width: 100%;
height: 100%;
background: white;
display: flex;
justify-content: center;
align-items: center;
}
.svg-container {
width: 300px;
height: 300px;
background: lightblue;
}
svg path {
fill: orange;
stroke: grey;
}
svg path:hover {
fill: yellow;
cursor: pointer;
}
#messages {
position: absolute;
left: 0;
top: 0;
height: 100px;
width: 100px;
}
</style>
<script>
const sectionConfigsMock = [
{
size: 0.67,
text: "Lorem ipsum"
},
{
size: 1,
text: "Dolor sit amet"
},
{
size: 3.5,
text: "Lorem ipsum"
},
{
size: 1.6,
text: "Dolor sit amet"
},
];
const outerRadiusMock = 500;
const innerRadiusMock = 150;
const calculateRelativeSizes = sectionConfigs => {
const smallestSize = sectionConfigs.reduce(
(currentMinValue, sectionConfig) =>
Math.min(currentMinValue, sectionConfig.size),
sectionConfigs[0].size
);
sectionConfigs.forEach(sectionConfig => {
sectionConfig.relativeSize = sectionConfig.size / smallestSize;
});
}
const calculateAbsoluteSizes = sectionConfigs => {
const totalRelativeSize = sectionConfigs.reduce((total, sectionConfig) =>
total + sectionConfig.relativeSize,
0
)
const unitSize = 2 * Math.PI / totalRelativeSize;
sectionConfigs.forEach(sectionConfig => {
sectionConfig.absoluteSize = sectionConfig.relativeSize * unitSize;
});
}
const calculateSectionEdges = sectionConfigs => {
let currentAngle = 0;
sectionConfigs.forEach(sectionConfig => {
sectionConfig.xLeft = Math.sin(currentAngle);
sectionConfig.yLeft = Math.cos(currentAngle);
currentAngle += sectionConfig.absoluteSize;
sectionConfig.xRight = Math.sin(currentAngle);
sectionConfig.yRight = Math.cos(currentAngle);
sectionConfig.inverse = sectionConfig.absoluteSize > Math.PI;
})
}
const generatePath = ({
yLeft,
xLeft,
yRight,
xRight,
inverse
}, outerRadius, innerRadius) =>
`
M ${xLeft * outerRadius} ${yLeft * outerRadius}
L ${xLeft * innerRadius} ${yLeft * innerRadius}
A ${innerRadius} ${innerRadius} 0 ${inverse ? 1 : 0} 0 ${xRight * innerRadius} ${yRight * innerRadius}
L ${xRight * outerRadius} ${yRight * outerRadius}
A ${outerRadius} ${outerRadius} 0 ${inverse ? 1 : 0} 1 ${xLeft * outerRadius} ${yLeft * outerRadius}
Z
`;
const createPathElement = (sectionConfig, outerRadius, innerRadius) => {
const element = document.createElementNS("http://www.w3.org/2000/svg", "path");
element.setAttribute("d", generatePath(sectionConfig, outerRadius, innerRadius));
element.setAttribute("stroke", "#f00");
element.setAttribute("stroke-width", "1");
element.setAttribute("fill-rule", "evenodd");
element.addEventListener("click", () => {
const messagesContainer = document.getElementById("messages");
messagesContainer.innerHTML = `Clicked: ${sectionConfig.text}`;
})
return element;
}
const generateDoughnutSections = (sectionConfigs, outerRadius, innerRadius) => {
calculateRelativeSizes(sectionConfigs);
calculateAbsoluteSizes(sectionConfigs);
calculateSectionEdges(sectionConfigs);
const fragment = document.createDocumentFragment();
sectionConfigs.forEach(sectionConfig => {
fragment.appendChild(createPathElement(
sectionConfig,
outerRadius,
innerRadius
));
});
document.getElementById("svg-path-group").appendChild(fragment);
}
generateDoughnutSections(sectionConfigsMock, outerRadiusMock, innerRadiusMock);
</script>
</body>
</html>