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<!--
THIS EXAMPLE WAS DOWNLOADED FROM https://echarts.apache.org/examples/en/editor.html?c=pie-parliament-transition
-->
<!DOCTYPE html>
<html lang="en" style="height: 100%">
<head>
<meta charset="utf-8" />
</head>
<body style="height: 100%; margin: 0">
<div id="container" style="height: 100%"></div>
<script
type="text/javascript"
src="https://fastly.jsdelivr.net/npm/[email protected]/dist/echarts.min.js"
></script>
<script type="text/javascript">
var dom = document.getElementById("container");
var myChart = echarts.init(dom, null, {
renderer: "canvas",
useDirtyRect: false,
});
var app = {};
var option;
const data = [
{ value: 40, name: "Túrázás" },
{ value: 30, name: "Városnézés" },
{ value: 5, name: "Borturisztika" },
{ value: 5, name: "Állatkert látogatás" },
{ value: 20, name: "Fotózás" },
];
const defaultPalette = ["#E667AC", "#3D5176", "#CEBDCB", "#6D6E6E", "#FFC423" ]
const radius = ["20%", "80%"];
const pieOption = {
series: [
{
type: "pie",
id: "distribution",
radius: radius,
label: {
show: true,
position: "outside",
formatter: "{b} ({d}%)",
fontSize: 20,
color: "#A0ADBE",
},
color:defaultPalette,
universalTransition: true,
animationDurationUpdate: 1000,
data: data,
},
],
};
const parliamentOption = (function () {
let sum = data.reduce(function (sum, cur) {
return sum + cur.value;
}, 0);
let angles = [];
let startAngle = -Math.PI / 2;
let curAngle = startAngle;
data.forEach(function (item) {
angles.push(curAngle);
curAngle += (item.value / sum) * Math.PI * 2;
});
angles.push(startAngle + Math.PI * 2);
function parliamentLayout(
startAngle,
endAngle,
totalAngle,
r0,
r1,
size
) {
let rowsCount = Math.ceil((r1 - r0) / size);
let points = [];
let r = r0;
for (let i = 0; i < rowsCount; i++) {
// Recalculate size
let totalRingSeatsNumber = Math.round((totalAngle * r) / size);
let newSize = (totalAngle * r) / totalRingSeatsNumber;
for (
let k = Math.floor((startAngle * r) / newSize) * newSize;
k < Math.floor((endAngle * r) / newSize) * newSize - 1e-6;
k += newSize
) {
let angle = k / r;
let x = Math.cos(angle) * r;
let y = Math.sin(angle) * r;
points.push([x, y]);
}
r += size;
}
return points;
}
return {
series: {
type: "custom",
id: "distribution",
data: data,
coordinateSystem: undefined,
universalTransition: true,
animationDurationUpdate: 1000,
renderItem: function (params, api) {
var idx = params.dataIndex;
var viewSize = Math.min(api.getWidth(), api.getHeight());
var r0 = ((parseFloat(radius[0]) / 100) * viewSize) / 2;
var r1 = ((parseFloat(radius[1]) / 100) * viewSize) / 2;
var cx = api.getWidth() * 0.5;
var cy = api.getHeight() * 0.5;
var size = viewSize / 67;
var points = parliamentLayout(
angles[idx],
angles[idx + 1],
Math.PI * 2,
r0,
r1,
size + 2
);
console.log(points.length);
return {
type: "group",
children: points.map(function (pt) {
return {
type: "circle",
autoBatch: true,
shape: {
cx: cx + pt[0],
cy: cy + pt[1],
r: size / 2,
},
style: {
fill: defaultPalette[idx % defaultPalette.length],
},
};
}),
};
},
},
};
})();
let currentOption = (option = pieOption);
setInterval(function () {
currentOption =
currentOption === pieOption ? parliamentOption : pieOption;
myChart.setOption(currentOption);
}, 6000);
if (option && typeof option === "object") {
myChart.setOption(option);
}
window.addEventListener("resize", myChart.resize);
</script>
</body>
</html>
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