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351 lines
8.3 KiB
351 lines
8.3 KiB
<!--本文件由FirstUI授权予内蒙古晟誉网络科技有限责任公司（手机号： 15 1 4822 8108，身份证尾号：1R6T39）专用，请尊重知识产权，勿私下传播，违者追究法律责任。-->
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<template>
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<view class="fui-autograph__wrap" :style="{ width: w + 'px', height:h + 'px',background:background }"
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ref="fui_gcanvas_ag">
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<!-- #ifdef APP-NVUE -->
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<gcanvas @touchstart="onTouchstart" @touchmove="onTouchmove" @touchend="onTouchend" @touchcancel="onTouchCancel"
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:ref="canvasId" :style="{ width: w + 'px', height:h + 'px' }">
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</gcanvas>
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<!-- #endif -->
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<!-- #ifndef APP-NVUE || MP-TOUTIAO || MP-QQ-->
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<canvas :disable-scroll="!completed" :canvas-id="canvasId" :id="canvasId" @touchstart="onTouchstart"
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@touchmove="onTouchmove" @touchend="onTouchend" @touchcancel="onTouchCancel"
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:style="{width:w+'px',height:h+'px'}" @mousedown="mousedown" @mousemove="mousemove" @mouseup="mouseup"
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@mouseleave="mouseleave"></canvas>
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<!-- #endif -->
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<!-- #ifdef MP-QQ -->
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<canvas :disable-scroll="!completed" canvas-id="canvas_autograph" @touchstart="onTouchstart"
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@touchmove="onTouchmove" @touchend="onTouchend" @touchcancel="onTouchCancel"
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:style="{width:w+'px',height:h+'px'}"></canvas>
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<!-- #endif -->
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<!-- #ifdef MP-TOUTIAO -->
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<canvas :disable-scroll="!completed" :canvas-id="canvasId" :id="canvasId" @touchstart="onTouchstart"
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@touchmove.stop.prevent="onTouchmove" @touchend="onTouchend" @touchcancel="onTouchCancel"
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:style="{width:w+'px',height:h+'px'}" v-if="canvasId"></canvas>
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<!-- #endif -->
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</view>
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</template>
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<script>
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// #ifdef APP-NVUE
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import {
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enable,
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WeexBridge
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} from './gcanvas/index.js';
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const dom = weex.requireModule('dom')
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// #endif
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// #ifdef MP-WEIXIN
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const canvasId = `fui_ag_${Math.ceil(Math.random() * 10e5).toString(36)}`
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// #endif
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export default {
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name: "fui-autograph",
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emits: ['ready'],
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props: {
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width: {
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type: [Number, String],
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default: 0
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},
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height: {
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type: [Number, String],
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default: 400
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},
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background: {
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type: String,
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default: '#ffffff'
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},
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//px
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lineWidth: {
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type: [Number, String],
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default: 5
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},
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color: {
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type: String,
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default: '#181818'
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},
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tips: {
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type: String,
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default: '请签名！'
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}
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},
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watch: {
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width(val) {
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if (val) {
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this.w = uni.upx2px(Number(val))
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}
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},
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height(val) {
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if (val) {
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this.h = uni.upx2px(Number(val))
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}
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}
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},
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data() {
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// #ifndef MP-WEIXIN || MP-QQ
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const canvasId = `fui_ag_${Math.ceil(Math.random() * 10e5).toString(36)}`
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// #endif
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// #ifdef MP-QQ
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const canvasId = 'canvas_autograph'
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// #endif
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return {
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// #ifdef APP-NVUE
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isAndroid: true,
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nTop: 0,
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nLeft: 0,
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// #endif
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canvasId: canvasId,
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w: 300,
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h: 200,
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completed: false,
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autograph: false
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};
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},
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created() {
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let sys = uni.getSystemInfoSync()
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// #ifdef APP-NVUE
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this.isAndroid = sys.platform.toLocaleLowerCase() === "android";
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// #endif
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this.w = this.width == 0 ? sys.windowWidth : uni.upx2px(Number(this.width));
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this.h = uni.upx2px(Number(this.height) || 400)
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this.ctx = null;
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this.touchs = null;
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},
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mounted() {
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this.$nextTick(() => {
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setTimeout(() => {
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// #ifdef APP-NVUE
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let ganvas = this.$refs[this.canvasId];
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/*通过元素引用获取canvas对象*/
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let canvasObj = enable(ganvas, {
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bridge: WeexBridge
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});
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/*获取绘图所需的上下文，暂不支持3d*/
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this.ctx = canvasObj.getContext('2d');
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if (!this.isAndroid) {
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this.getDom()
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}
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// #endif
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// #ifndef APP-NVUE
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this.ctx = uni.createCanvasContext(this.canvasId, this)
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// #endif
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// #ifdef MP-BAIDU
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this.redraw()
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// #endif
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this.$emit('ready', {
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canvasId: this.canvasId
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})
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}, 50)
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})
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},
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// #ifndef VUE3
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beforeDestroy() {
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this.ctx = null;
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this.touchs = null;
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},
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// #endif
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// #ifdef VUE3
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beforeUnmount() {
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this.ctx = null;
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this.touchs = null;
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},
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// #endif
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methods: {
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// #ifdef APP-NVUE
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getDom() {
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dom.getComponentRect(this.$refs['fui_gcanvas_ag'], option => {
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if (option && option.result && option.size) {
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this.nTop = option.size.top
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this.nLeft = option.size.left
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}
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})
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},
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// #endif
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isPC() {
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var userAgentInfo = navigator.userAgent;
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var Agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
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var flag = true;
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for (let v = 0; v < Agents.length - 1; v++) {
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if (userAgentInfo.indexOf(Agents[v]) > 0) {
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flag = false;
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break;
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}
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}
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return flag;
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},
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onTouchstart(e) {
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if (this.completed) return;
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let point = {};
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// #ifndef APP-NVUE
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point = {
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x: e.touches[0].x,
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y: e.touches[0].y
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};
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// #endif
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// #ifdef APP-NVUE
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point = {
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x: e.touches[0].pageX - this.nLeft,
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y: e.touches[0].pageY - this.nTop
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};
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// #endif
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this.ctx.setStrokeStyle(this.color);
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this.ctx.setLineWidth(this.lineWidth);
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this.ctx.setLineCap('round');
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this.touchs = [point];
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},
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mousedown(e) {
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// #ifdef H5
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if (!this.isPC() || this.completed) return;
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let point = {
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x: e.pageX - e.target.offsetLeft,
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y: e.pageY - e.target.offsetTop
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};
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this.ctx.setStrokeStyle(this.color);
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this.ctx.setLineWidth(this.lineWidth);
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this.ctx.setLineCap('round');
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this.touchs = [point];
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// #endif
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},
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onTouchmove(e) {
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if (this.completed) return;
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let point = null;
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// #ifndef APP-NVUE
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point = {
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x: e.touches[0].x,
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y: e.touches[0].y
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};
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// #endif
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// #ifdef APP-NVUE
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//changedTouches
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point = {
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x: e.touches[0].pageX - this.nLeft,
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y: e.touches[0].pageY - this.nTop
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};
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// #endif
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point && this.touchs.push(point)
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if (this.touchs.length >= 2) {
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this.startDraw();
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}
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},
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mousemove(e) {
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// #ifdef H5
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if (!this.isPC() || this.completed || !this.touchs) return;
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let point = {
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x: e.pageX - e.target.offsetLeft,
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y: e.pageY - e.target.offsetTop
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};
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this.touchs.push(point)
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if (this.touchs.length >= 2) {
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this.startDraw();
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}
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// #endif
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},
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onTouchend(e) {
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if (this.completed) return;
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this.touchs = null
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},
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mouseup(e) {
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// #ifdef H5
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if (!this.isPC() || this.completed) return;
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this.touchs = null
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// #endif
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},
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mouseleave(e) {
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// #ifdef H5
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if (!this.isPC() || this.completed) return;
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this.touchs = null
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// #endif
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},
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onTouchCancel(e) {
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if (this.completed) return;
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// console.log('touchCancel：', e)
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},
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startDraw() {
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this.autograph = true;
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const point1 = this.touchs[0];
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const point2 = this.touchs[1];
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this.touchs.shift();
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this.ctx.moveTo(point1.x, point1.y);
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this.ctx.lineTo(point2.x, point2.y);
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this.ctx.stroke();
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this.ctx.draw(true);
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},
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//重新绘制
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redraw() {
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this.completed = false;
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this.touchs = null;
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this.autograph = false;
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this.ctx.clearRect(0, 0, this.w, this.h);
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this.ctx.beginPath()
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this.ctx.draw();
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},
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drawComplete(callback) {
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if (!this.autograph && this.tips && this.tips !== true && this.tips !== 'true') {
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uni.showToast({
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title: this.tips,
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icon: 'none'
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});
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return;
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}
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this.completed = true;
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const platform = uni.getSystemInfoSync().platform;
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let time = 50;
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if (platform === 'android') {
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time = 200;
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}
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setTimeout(() => {
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// #ifdef MP-ALIPAY
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this.ctx.toTempFilePath({
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success: res => {
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callback && callback(res.apFilePath)
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},
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fail: err => {
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callback && callback(false)
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}
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});
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// #endif
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// #ifndef MP-ALIPAY || APP-NVUE
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uni.canvasToTempFilePath({
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x: 0,
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y: 0,
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canvasId: this.canvasId,
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fileType: 'png',
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quality: 1,
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success: function(res) {
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callback && callback(res.tempFilePath)
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},
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fail() {
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callback && callback(false)
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}
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}, this)
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// #endif
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// #ifdef APP-NVUE
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this.ctx.toTempFilePath(
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0,
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0,
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this.w * 2,
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this.h * 2,
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this.w * 2,
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this.h * 2,
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"png",
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1,
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function(res) {
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callback && callback(res.tempFilePath)
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},
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function() {
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callback && callback(false)
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}
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)
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// #endif
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}, time)
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}
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}
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}
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</script>
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<style scoped></style>
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