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109 lines
3.0 KiB
Vue
109 lines
3.0 KiB
Vue
<template>
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<div class="imgCanvansDiv">
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<img
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:src="imageObj[index].path"
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:ref="'imgref' + index"
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:id="'img' + index"
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/>
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<canvas
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:ref="'canvansref' + index"
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:id="'canvas_' + index"
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class="canvasAll"
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></canvas>
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</div>
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</template>
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<script>
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export default {
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props: {
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imageObj: {
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type: Array,
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default: () => [],
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},
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index: {
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type: Number,
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default: () => "",
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},
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},
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data() {
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return {
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textInfo: "",
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};
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},
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mounted() {
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this.$nextTick(() => {
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this.drawlineListAll(this.imageObj);
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});
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},
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methods: {
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//绘制所有的图片告警区域
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drawlineListAll(val) {
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for (let i = 0; i < val.length; i++) {
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console.log(i);
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console.log(document.getElementById("canvas_" + i));
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console.log(document.getElementById("img" + i));
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this.canvas = document.getElementById("canvas_" + i);
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this.imgpic = document.getElementById("img" + i);
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this.textInfo = val[i].enname;
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console.log(this.textInfo);
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console.log(this.imgpic.offsetWidth);
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console.log(this.canvas);
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this.canvas.width = this.imgpic.offsetWidth; //设置画布大小
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this.canvas.height = this.imgpic.offsetHeight; //设置画布大小
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console.log(this.canvas.width, this.canvas.height);
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this.ctx = this.canvas.getContext("2d");
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this.ctx.beginPath();
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//设置线条颜色，必须放在绘制之前
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this.ctx.strokeStyle = "#ff0000";
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// 线宽设置，必须放在绘制之前
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this.ctx.lineWidth = 1;
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// 绘制矩形
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var scaleX = this.canvas.width / val[i].photoWidth, //this.iw图片的宽
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scaleY = this.canvas.height / val[i].photoHeight; //this.ih图片的高
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console.log(scaleX, scaleY);
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var top = val[i].x * scaleX,
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left = val[i].y * scaleY,
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width = val[i].width * scaleX,
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height = val[i].height * scaleY;
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console.log(top, left, width, height);
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// this.ctx.strokeStyle = "red"; //线的颜色
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this.ctx.strokeRect(top, left, width, height); //绘制路径矩形
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//this.ctx.strokeRect(val[i].x, val[i].y, val[i].width, val[i].height);
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this.ctx.font = "16px normal";
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this.ctx.fillStyle = "#ff0000";
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//this.ctx.fillText(this.textInfo, top, left + 24);
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//距离上面有空间
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if (left > 32) {
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this.ctx.fillText(this.textInfo, top, left - 4);
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} else if (this.canvas.height - left + height > 32) {
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this.ctx.fillText(this.textInfo, top, height - 4);
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}
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this.ctx.closePath();
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this.ctx.stroke();
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}
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},
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},
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};
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</script>
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<style lang="less">
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.imgCanvansDiv {
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width: 100%;
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height: 100%;
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position: relative;
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img {
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width: 100%;
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height: 100%;
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}
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.canvasAll {
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position: absolute;
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width: 100%;
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height: 100%;
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z-index: 2;
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left: 0;
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top: 0;
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pointer-events: none;
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}
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}
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</style>
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