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<template>
<div class="box">
<canvas style="" :width="contentWidth" :height="contentHeight" id="cav" @click="next()"></canvas>
</div>
</template>
<script>
export default {
name: 'verificationCode',
props: {
fontSize: {
type: Number,
default: 20
},
contentWidth: {
type: Number,
default: 80
},
contentHeight: {
type: Number,
default: 32
},
verification: {
type: String
},
refreshCode: {
type: Boolean
}
},
watch: {
verification: function (newVal) {
if (newVal.toLowerCase() === this.identify.toLowerCase()) {
this.$emit('handleIdentify', true)
} else {
this.$emit('handleIdentify', false)
}
},
refreshCode: function (newVal) {
this.draw()
}
},
mounted () {
this.draw()
},
data () {
return {
identify: '',
letter: [2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']
}
},
methods: {
draw () {
let self = this
let text = this.randomNum()
this.identify = text.join('')
let ctx = document.getElementById('cav')
let cav = ctx.getContext('2d')
cav.clearRect(0, 0, self.contentWidth, self.contentHeight)
let w = ctx.width
let h = ctx.height
cav.textBaseline = 'bottom'
self.drawText(cav, text[0], 10, 10, self.randomDeg(0, 0.1), 20)
self.drawText(cav, text[1], 20, 10, self.randomDeg(0, 0.1))
self.drawText(cav, text[2], 25, 10, self.randomDeg(0, 0.1))
self.drawText(cav, text[3], 30, 10, self.randomDeg(0, 0.1))
let i
for (i = 0; i < 3; i++) {
self.drawLine(cav, self.randomDeg(0, 0.3 * w, 1), self.randomDeg(0, h, 1), self.randomDeg(0, w, 1), self.randomDeg(0, h, 1), self.randomDeg(0.8 * w, w, 1), self.randomDeg(0, h, 1))
}
},
drawText (cav, text, x1, y1, route) {
cav.beginPath()
cav.fillStyle = '#ffe9db'
cav.font = this.fontSize + 'px' + ' ' + '黑体'
cav.translate(x1, y1)
cav.rotate(Math.PI * route)
cav.fillText(text, x1, y1)
cav.fill()
cav.rotate(-Math.PI * route)
cav.translate(-(x1), -(y1))
},
drawLine (cav, x1, y1, x2, y2, x3, y3) {
cav.beginPath()
cav.strokeStyle = 'rgb(155, 204, 237)'
cav.bezierCurveTo(x1, y1, x2, y2, x3, y3)
cav.stroke()
},
randomNum () { // 生成随机字
let i
let letter = this.letter
let text = []
for (i = 0; i < 4; i++) {
text.push(letter[Math.floor(Math.random() * 31)])
}
//console.log(text);
let str = text.join('');
this.$emit('getstr',str)
return text;
},
randomDeg (min, max, f) { // 设置文字倾斜角度
f = undefined ? Math.random() > 0.5 ? 1 : -1 : 1
return f * (Math.random() * (max - min) + min)
},
next () {
this.draw()
}
}
}
</script>
<style scoped>
.box{display: flex;justify-content: flex-start;align-items: center;border-radius: 4px;background-color: var(--themeColor)!important;width:80px;height: 40px;margin: 0 auto;}
</style>
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