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<template>
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<view class="u-select">
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<u-popup :maskCloseAble="maskCloseAble" mode="bottom" :popup="false" v-model="value" length="auto"
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:safeAreaInsetBottom="safeAreaInsetBottom" @close="close" :z-index="uZIndex">
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<view class="u-select">
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<view class="u-select__header" @touchmove.stop.prevent="">
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<view class="u-select__header__cancel u-select__header__btn" :style="{ color: cancelColor }"
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hover-class="u-hover-class" :hover-stay-time="150" @tap="getResult('cancel')">
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{{cancelText}}
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</view>
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<view class="u-select__header__title">
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{{title}}
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</view>
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<view class="u-select__header__confirm u-select__header__btn"
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:style="{ color: moving ? cancelColor : confirmColor }" hover-class="u-hover-class"
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:hover-stay-time="150" @touchmove.stop="" @tap.stop="getResult('confirm')">
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{{confirmText}}
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</view>
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</view>
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<view class="u-select__body u-select__body__treeSelect">
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<view class="treeSelect-search" v-if="filterable">
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<u-input input-align='left' v-model="filterText" placeholder="输入关键字进行过滤"
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class="u-border-bottom"></u-input>
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</view>
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<view class="tree-box">
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<scroll-view :scroll-y="true" style="height: 100%">
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<ly-tree ref="tree" :node-key="realProps.value" :tree-data="options" :props="realProps"
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:show-node-icon="true" :filter-node-method="filterNode" child-visible-for-filter-node
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check-on-click-node :expand-on-click-node="false" default-expand-all
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:show-radio="!multiple" :show-checkbox="multiple" />
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</scroll-view>
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</view>
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</view>
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</view>
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</u-popup>
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</view>
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</template>
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<script>
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/**
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* tree-select 树形选择器
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* @property {Boolean} v-model 布尔值变量，用于控制选择器的弹出与收起
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* @property {Boolean} safe-area-inset-bottom 是否开启底部安全区适配(默认false)
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* @property {String} cancel-color 取消按钮的颜色（默认#606266）
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* @property {String} confirm-color 确认按钮的颜色(默认#2979ff)
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* @property {String} confirm-text 确认按钮的文字
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* @property {String} cancel-text 取消按钮的文字
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* @property {Boolean} mask-close-able 是否允许通过点击遮罩关闭Picker(默认true)
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* @property {String Number} z-index 弹出时的z-index值(默认10075)
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* @event {Function} confirm 点击确定按钮，返回当前选择的值
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*/
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const defaultProps = {
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label: 'fullName',
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value: 'id',
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icon: 'icon',
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children: 'children'
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}
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import LyTree from '@/components/ly-tree/ly-tree.vue'
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export default {
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name: "tree-select",
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components: {
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LyTree
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},
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props: {
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options: {
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type: Array,
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default () {
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return [];
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}
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},
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filterable: {
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type: Boolean,
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default: false
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},
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// 是否显示边框
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border: {
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type: Boolean,
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default: true
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},
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// 通过双向绑定控制组件的弹出与收起
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value: {
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type: Boolean,
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default: false
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},
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// "取消"按钮的颜色
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cancelColor: {
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type: String,
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default: '#606266'
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},
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// "确定"按钮的颜色
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confirmColor: {
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type: String,
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default: '#2979ff'
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},
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// 弹出的z-index值
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zIndex: {
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type: [String, Number],
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default: 0
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},
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safeAreaInsetBottom: {
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type: Boolean,
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default: false
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},
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// 是否允许通过点击遮罩关闭Picker
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maskCloseAble: {
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type: Boolean,
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default: true
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},
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defaultValue: {
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type: Array,
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default: () => []
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},
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props: {
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type: Object,
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default: () => ({
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label: 'fullName',
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value: 'id',
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icon: 'icon',
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children: 'children'
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})
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},
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// 只能选择最后一层的数值
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lastLevel: {
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type: Boolean,
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default: false
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},
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// 只能选择最后一层的数值时，需要根据lastLevelKey来判断是否最后一层
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lastLevelKey: {
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type: String,
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default: "hasChildren"
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},
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lastLevelValue: {
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default: false
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},
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multiple: {
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type: Boolean,
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default: false
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},
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// 顶部标题
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title: {
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type: String,
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default: ''
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},
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// 取消按钮的文字
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cancelText: {
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type: String,
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default: '取消'
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},
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// 确认按钮的文字
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confirmText: {
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type: String,
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default: '确认'
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}
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},
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data() {
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return {
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filterText: '',
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moving: false
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};
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},
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watch: {
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// 在select弹起的时候，重新初始化所有数据
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value: {
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immediate: true,
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handler(val) {
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if (val) setTimeout(() => this.init(), 10);
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}
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},
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filterText(val) {
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this.$refs.tree.filter(val);
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}
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},
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computed: {
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uZIndex() {
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// 如果用户有传递z-index值，优先使用
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return this.zIndex ? this.zIndex : this.$u.zIndex.popup;
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},
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realProps() {
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return {
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...defaultProps,
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...this.props
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}
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}
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},
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methods: {
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// 标识滑动开始，只有微信小程序才有这样的事件
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pickstart() {
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// #ifdef MP-WEIXIN
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this.moving = true;
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// #endif
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},
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// 标识滑动结束
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pickend() {
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// #ifdef MP-WEIXIN
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this.moving = false;
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// #endif
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},
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filterNode(value, data) {
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if (!value) return true;
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// #ifndef MP
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return data[this.realProps.label].indexOf(value) !== -1;
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// #endif
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// #ifdef MP
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return this.label.indexOf(value) !== -1;
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// #endif
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},
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init() {
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this.filterText = ''
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this.setSelectValue();
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},
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// 获取默认选中的值
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setSelectValue() {
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this.$nextTick(() => {
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this.$refs.tree.setCheckedKeys(this.defaultValue)
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})
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},
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close() {
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this.$emit('input', false);
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},
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// 点击确定或者取消
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getResult(event = null) {
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// #ifdef MP-WEIXIN
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if (this.moving) return;
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// #endif
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if (event) {
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let selectValue = this.$refs.tree.getCheckedNodes()
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if (this.lastLevel) {
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selectValue = selectValue.filter(o => o[this.lastLevelKey] == this.lastLevelValue)
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}
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if (event === 'confirm' && !selectValue.length) return
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this.$emit(event, selectValue);
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}
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this.close();
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}
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}
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};
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</script>
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<style scoped lang="scss">
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@import "@/uview-ui/libs/css/style.components.scss";
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.u-select {
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&__action {
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position: relative;
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line-height: $u-form-item-height;
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height: $u-form-item-height;
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&__icon {
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position: absolute;
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right: 20rpx;
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top: 50%;
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transition: transform .4s;
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transform: translateY(-50%);
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z-index: 1;
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&--reverse {
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transform: rotate(-180deg) translateY(50%);
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}
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}
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}
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&__hader {
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&__title {
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color: $u-content-color;
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}
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}
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&--border {
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border-radius: 6rpx;
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border-radius: 4px;
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border: 1px solid $u-form-item-border-color;
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}
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&__header {
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@include vue-flex;
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align-items: center;
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justify-content: space-between;
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height: 80rpx;
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padding: 0 40rpx;
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}
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&__body {
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width: 100%;
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height: 500rpx;
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overflow: hidden;
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background-color: #fff;
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&__picker-view {
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height: 100%;
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box-sizing: border-box;
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&__item {
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@include vue-flex;
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align-items: center;
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justify-content: center;
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font-size: 32rpx;
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color: $u-main-color;
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padding: 0 8rpx;
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}
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}
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}
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}
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</style>
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