冬天地上扑的是雪，厚厚的，软软的；房上落的是雪，白皑皑的，又松又软；树上盖的是雪，积雪把树枝压弯了腰。太阳照在雪山上，发出耀眼的光芒。
本文实例为大家分享了Vue使用鼠标在Canvas上绘制矩形的具体代码，供大家参考，具体内容如下
1.代码
<template>
<div class="test" style="background-color: burlywood;">
<canvas id="myCanvas" ref="myCanvas"
width="460" height="240" @mousedown="mousedown" @mouseup="mouseup" @mousemove="mousemove">
</canvas>
</div>
</template>
<script>
export default {
name:"hello-world",
data() {
return {
flag: false,
x: 0,
y: 0
};
},
watch: {},
computed: {},
methods: {
mousedown(e){
console.log("鼠标落下");
this.flag = true;
this.x = e.offsetX; // 鼠标落下时的X
this.y = e.offsetY; // 鼠标落下时的Y
},
mouseup(e){
console.log("鼠标抬起");
this.flag = false;
},
mousemove(e){
console.log("鼠标移动");
this.drawRect(e);
},
drawRect(e){
if(this.flag){
console.log("绘制图形");
const canvas = this.$refs.myCanvas;
var ctx = canvas.getContext("2d");
let x = this.x;
let y = this.y;
ctx.clearRect(0,0,canvas.width,canvas.height);
ctx.beginPath();
//设置线条颜色，必须放在绘制之前
ctx.strokeStyle = '#00ff00';
// 线宽设置，必须放在绘制之前
ctx.lineWidth = 1;
ctx.strokeRect(x,y,e.offsetX-x,e.offsetY-y);
}
}
},
created() {
},
mounted() {
}
};
</script>
<style scoped>
#myCanvas{
background-color: forestgreen;
background-image:url('../bg.jpg');
}
</style>
2.运行截图
本文Vue如何使用鼠标在Canvas上绘制矩形到此结束。人的生命恰似一部小说，其价值在于贡献而不在于短长。小编再次感谢大家对我们的支持！
