本文實例為大家分享了Vue使用鼠標在Canvas上繪制矩形的具體代碼，供大家參考，具體內容如下
1.代碼
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<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("鼠標落下"); this.flag = true; this.x = e.offsetX; // 鼠標落下時的X this.y = e.offsetY; // 鼠標落下時的Y }, mouseup(e){ console.log("鼠標抬起"); this.flag = false; }, mousemove(e){ console.log("鼠標移動"); this.drawRect(e); }, drawRect(e){ if(this.flag){ console.log("繪制圖形"); 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(); //設置線條顏色，必須放在繪制之前 ctx.strokeStyle = '#00ff00'; // 線寬設置，必須放在繪制之前 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.運行截圖
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/LONG_Yi_1994/article/details/107058286
