<template>
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<u-transition
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:show="show"
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custom-class="u-overlay"
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:duration="duration"
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:custom-style="overlayStyle"
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@click="clickHandler"
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>
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<slot />
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</u-transition>
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</template>
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<script>
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import props from './props.js';
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/**
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* overlay 遮罩
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* @description 创建一个遮罩层，用于强调特定的页面元素，并阻止用户对遮罩下层的内容进行操作，一般用于弹窗场景
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* @tutorial https://www.uviewui.com/components/overlay.html
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* @property {Boolean} show 是否显示遮罩（默认 false ）
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* @property {String | Number} zIndex zIndex 层级（默认 10070 ）
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* @property {String | Number} duration 动画时长，单位毫秒（默认 300 ）
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* @property {String | Number} opacity 不透明度值，当做rgba的第四个参数 （默认 0.5 ）
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* @property {Object} customStyle 定义需要用到的外部样式
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* @event {Function} click 点击遮罩发送事件
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* @example <u-overlay :show="show" @click="show = false"></u-overlay>
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*/
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export default {
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name: "u-overlay",
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mixins: [uni.$u.mpMixin, uni.$u.mixin,props],
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computed: {
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overlayStyle() {
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const style = {
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position: 'fixed',
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top: 0,
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left: 0,
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right: 0,
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zIndex: this.zIndex,
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bottom: 0,
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'background-color': `rgba(0, 0, 0, ${this.opacity})`
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}
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return uni.$u.deepMerge(style, uni.$u.addStyle(this.customStyle))
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}
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},
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methods: {
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clickHandler() {
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this.$emit('click')
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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@import "../../libs/css/components.scss";
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$u-overlay-top:0 !default;
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$u-overlay-left:0 !default;
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$u-overlay-width:100% !default;
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$u-overlay-height:100% !default;
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$u-overlay-background-color:rgba(0, 0, 0, .7) !default;
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.u-overlay {
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position: fixed;
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top:$u-overlay-top;
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left:$u-overlay-left;
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width: $u-overlay-width;
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height:$u-overlay-height;
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background-color:$u-overlay-background-color;
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}
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</style>
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