function drawCircle(canvasId, option) {
const color_arr = option.color
let data_arr = option.data
const pi2 = Math.PI * 2;
let canvas = document.getElementById(canvasId);
let c = canvas.getContext( "2d" );
let startAgl = 0;
let agl;
let sum = 0;
const cW = canvas.width;
const cH = canvas.height;
for (let item of data_arr) {
sum += item.value * 1.0
}
data_arr = data_arr.map((v, i) => {
return {
name: v.name,
value: (v.value) * 1.0 / sum
}
})
for (let i = 0; i < data_arr.length; i++) {
let min = (cW > cH ? cH : cW);
agl = data_arr[i].value * pi2 + startAgl;
c.strokeStyle = color_arr[i];
c.lineWidth = data_arr[i].value * min * 0.3;
c.beginPath();
c.arc(cW / 2, cH / 2, min * 0.3, startAgl, agl, false );
c.stroke();
c.closePath();
startAgl = agl;
c.fillStyle = color_arr[i];
c.fillRect(cW * 0.8, 50 + 18 * i, 16, 16);
c.fillText(data_arr[i].name, cW * 0.8 + 20, 62 + 18 * i);
}
}
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