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<template>
<view class="u-mask" hover-stop-propagation :style="[maskStyle, zoomStyle, filterStyle]" @tap="click" @touchmove.stop.prevent="() => {}" :class="{
'u-mask-zoom': zoom,
'u-mask-show': show
}">
<slot />
</view>
</template>
<script>
/**
* mask 遮罩
* @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
* @tutorial https://www.uviewui.com/components/mask.html
* @property {Boolean} show 是否显示遮罩(默认false)
* @property {String Number} z-index z-index 层级(默认1070)
* @property {Object} custom-style 自定义样式对象,见上方说明
* @property {String Number} duration 动画时长,单位毫秒(默认300)
* @property {Boolean} zoom 是否使用scale对遮罩进行缩放(默认true)
* @property {Boolean} mask-click-able 遮罩是否可点击,为false时点击不会发送click事件(默认true)
* @event {Function} click mask-click-able为true时,点击遮罩发送此事件
* @example <u-mask :show="show" @click="show = false"></u-mask>
*/
export default {
name: "u-mask",
emits: ["click"],
props: {
// 是否显示遮罩
show: {
type: Boolean,
default: false
},
// 层级z-index
zIndex: {
type: [Number, String],
default: ''
},
// 用户自定义样式
customStyle: {
type: Object,
default () {
return {}
}
},
// 遮罩的动画样式, 是否使用使用zoom进行scale进行缩放
zoom: {
type: Boolean,
default: true
},
// 遮罩的过渡时间,单位为ms
duration: {
type: [Number, String],
default: 300
},
// 是否可以通过点击遮罩进行关闭
maskClickAble: {
type: Boolean,
default: true
},
// 遮罩的模糊度
blur: {
type: [Number, String],
default: 0
},
},
data() {
return {
zoomStyle: {
transform: ''
},
scale: 'scale(1.2, 1.2)'
}
},
watch: {
show(n) {
if(n && this.zoom) {
// 当展示遮罩的时候,设置scale为1,达到缩小(原来为1.2)的效果
this.zoomStyle.transform = 'scale(1, 1)';
} else if(!n && this.zoom) {
// 当隐藏遮罩的时候,设置scale为1.2,达到放大(因为显示遮罩时已重置为1)的效果
this.zoomStyle.transform = this.scale;
}
}
},
computed: {
maskStyle() {
let style = {};
style.backgroundColor = "rgba(0, 0, 0, 0.6)";
if(this.show) style.zIndex = this.zIndex ? this.zIndex : this.$u.zIndex.mask;
else style.zIndex = -1;
style.transition = `all ${this.duration / 1000}s ease-in-out`;
// 判断用户传递的对象是否为空,不为空就进行合并
if (Object.keys(this.customStyle).length) style = {
...style,
...this.customStyle
};
return style;
},
filterStyle() {
let { blur } = this;
let style = {};
if (blur) {
style.backdropFilter = `blur(${blur}rpx)`;
}
return style;
}
},
methods: {
click() {
if (!this.maskClickAble) return;
this.$emit('click');
}
}
}
</script>
<style lang="scss" scoped>
@import "../../libs/css/style.components.scss";
.u-mask {
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
opacity: 0;
transition: transform 0.3s;
}
.u-mask-show {
opacity: 1;
}
.u-mask-zoom {
transform: scale(1.2, 1.2);
}
</style>