<template>
<div>
<canvas id="myCanvas" :width="width" :height="height"></canvas>
</div>
</template>
<script>
export default {
data () {
return {
ele: null
}
},
props: {
{
type: String,
default: '200'
},
height: {
type: String,
default: '200'
},
src: {
type: String,
default: require('./dashback.png')
},
percent: {
type: String,
default: 75
},
pad {
default: 0.75
},
border {
default: 20
},
},
methods: {
PI (deg)
{
return (deg/100)*2*Math.PI;
},
draw () {
let can = document.getElementById("myCanvas")
let cxt = can.getContext("2d")
cxt.clearRect(0,0,this.width,this.height)
let img = new Image()
img.src = this.src
img.onload = () => {
cxt.drawImage(img,0,0,this.width,this.height);
/* 文字 */
cxt.fillStyle="#ffffff";
cxt.font = "47px Arial"
cxt.fillText(this.percent,(parseInt(this.width)-70)/2,(parseInt(this.height)+29)/2)
cxt.font = "18px Arial"
cxt.fillText("分",(parseInt(this.width)+36)/2,(parseInt(this.height)+29)/2)
cxt.beginPath();
cxt.arc(parseInt(this.width)/2, parseInt(this.height)/2, this.padwidth*this.width/2, this.PI(100), this.PI(0), true)
cxt.lineWidth = this.borderwidth*0.6;
cxt.strokeStyle = 'rgba(255,255,255,.35)';
cxt.shadowOffsetX = 0
cxt.shadowOffsetY = 0
cxt.shadowColor = 'rgb(100,100,100)'
cxt.shadowBlur = 10
cxt.stroke();
cxt.beginPath();
cxt.arc(parseInt(this.width)/2, parseInt(this.height)/2, this.padwidth*this.width/2, this.PI(this.percent), this.PI(0), true);
cxt.lineWidth = this.borderwidth;
cxt.strokeStyle = 'white';
cxt.shadowOffsetX = 0
cxt.shadowOffsetY = 0
cxt.shadowColor = 'rgb(100,100,100)'
cxt.shadowBlur = 10
cxt.stroke();
}
}
},
mounted: function () {
this.draw()
},
created: function () {
},
watch: {
'percent': function(newVal){
this.draw()
}
}
}
</script>
使用
<dash-board percent="45"></dash-board>
效果
原图
