133 lines
4.2 KiB
Vue
133 lines
4.2 KiB
Vue
<template>
|
||
<view class="u-dropdown-item" v-if="active" @touchmove.stop.prevent="() => {}" @tap.stop.prevent="() => {}">
|
||
<block v-if="!$slots.default && !$slots.$default">
|
||
<scroll-view scroll-y="true" :style="{
|
||
height: $u.addUnit(height)
|
||
}">
|
||
<view class="u-dropdown-item__options">
|
||
<u-cell-group>
|
||
<u-cell-item @click="cellClick(item.value)" :arrow="false" :title="item.label" v-for="(item, index) in options"
|
||
:key="index" :title-style="{
|
||
color: value == item.value ? activeColor : inactiveColor
|
||
}">
|
||
<u-icon v-if="value == item.value" name="checkbox-mark" :color="activeColor" size="32"></u-icon>
|
||
</u-cell-item>
|
||
</u-cell-group>
|
||
</view>
|
||
</scroll-view>
|
||
</block>
|
||
<slot v-else />
|
||
</view>
|
||
</template>
|
||
|
||
<script>
|
||
/**
|
||
* dropdown-item 下拉菜单
|
||
* @description 该组件一般用于向下展开菜单,同时可切换多个选项卡的场景
|
||
* @tutorial http://uviewui.com/components/dropdown.html
|
||
* @property {String | Number} v-model 双向绑定选项卡选择值
|
||
* @property {String} title 菜单项标题
|
||
* @property {Array[Object]} options 选项数据,如果传入了默认slot,此参数无效
|
||
* @property {Boolean} disabled 是否禁用此选项卡(默认false)
|
||
* @property {String | Number} duration 选项卡展开和收起的过渡时间,单位ms(默认300)
|
||
* @property {String | Number} height 弹窗下拉内容的高度(内容超出将会滚动)(默认auto)
|
||
* @example <u-dropdown-item title="标题"></u-dropdown-item>
|
||
*/
|
||
export default {
|
||
name: 'u-dropdown-item',
|
||
props: {
|
||
// 当前选中项的value值
|
||
value: {
|
||
type: [Number, String, Array],
|
||
default: ''
|
||
},
|
||
// 菜单项标题
|
||
title: {
|
||
type: [String, Number],
|
||
default: ''
|
||
},
|
||
// 选项数据,如果传入了默认slot,此参数无效
|
||
options: {
|
||
type: Array,
|
||
default () {
|
||
return []
|
||
}
|
||
},
|
||
// 是否禁用此菜单项
|
||
disabled: {
|
||
type: Boolean,
|
||
default: false
|
||
},
|
||
// 下拉弹窗的高度
|
||
height: {
|
||
type: [Number, String],
|
||
default: 'auto'
|
||
},
|
||
},
|
||
data() {
|
||
return {
|
||
active: false, // 当前项是否处于展开状态
|
||
activeColor: '#2979ff', // 激活时左边文字和右边对勾图标的颜色
|
||
inactiveColor: '#606266', // 未激活时左边文字和右边对勾图标的颜色
|
||
}
|
||
},
|
||
computed: {
|
||
// 监听props是否发生了变化,有些值需要传递给父组件u-dropdown,无法双向绑定
|
||
propsChange() {
|
||
return `${this.title}-${this.disabled}`;
|
||
}
|
||
},
|
||
watch: {
|
||
propsChange(n) {
|
||
// 当值变化时,通知父组件重新初始化,让父组件执行每个子组件的init()方法
|
||
// 将所有子组件数据重新整理一遍
|
||
if (this.parent) this.parent.init();
|
||
}
|
||
},
|
||
created() {
|
||
// 父组件的实例
|
||
this.parent = false;
|
||
},
|
||
methods: {
|
||
init() {
|
||
// 获取父组件u-dropdown
|
||
let parent = this.$u.$parent.call(this, 'u-dropdown');
|
||
if (parent) {
|
||
this.parent = parent;
|
||
// 将子组件的激活颜色配置为父组件设置的激活和未激活时的颜色
|
||
this.activeColor = parent.activeColor;
|
||
this.inactiveColor = parent.inactiveColor;
|
||
// 将本组件的this,放入到父组件的children数组中,让父组件可以操作本(子)组件的方法和属性
|
||
// push进去前,显判断是否已经存在了本实例,因为在子组件内部数据变化时,会通过父组件重新初始化子组件
|
||
let exist = parent.children.find(val => {
|
||
return this === val;
|
||
})
|
||
if (!exist) parent.children.push(this);
|
||
if (parent.children.length == 1) this.active = true;
|
||
// 父组件无法监听children的变化,故将子组件的title,传入父组件的menuList数组中
|
||
parent.menuList.push({
|
||
title: this.title,
|
||
disabled: this.disabled
|
||
});
|
||
}
|
||
},
|
||
// cell被点击
|
||
cellClick(value) {
|
||
// 修改通过v-model绑定的值
|
||
this.$emit('input', value);
|
||
// 通知父组件(u-dropdown)收起菜单
|
||
this.parent.close();
|
||
// 发出事件,抛出当前勾选项的value
|
||
this.$emit('change', value);
|
||
}
|
||
},
|
||
mounted() {
|
||
this.init();
|
||
}
|
||
}
|
||
</script>
|
||
|
||
<style scoped lang="scss">
|
||
@import "../../libs/css/style.components.scss";
|
||
</style>
|