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<script lang="ts">
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// import pickerItem from './picker-item.uvue'
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import { PropType } from "vue"
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import { PICKER_ITEM_INFO, X_PICKER_X_ITEM } from "../../interface.uts"
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/**
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* @name 选择器容器 xPickerView
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* @description 这是非官方pickerView封装,由于我是自行开发的，
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因此比较好的能控制动画，回弹，阻尼，禁用项等
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如果你不喜欢这个样式可以修改源码，比官方的更好更改样式。
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组件采用数组id式选择，非索引。考虑到实际实用中多以id为交互提交数据。因此摒弃了传统的索引选项
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* @page /pages/index/picker-view
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* @category 表单组件
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* @constant 平台兼容
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* | Harmony | H5 | andriod | IOS | 小程序 | UTS | UNIAPP-X SDK | version |
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| --- | --- | --- | --- | --- | --- | --- | --- |
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| ☑ | ☑ | ☑️ | ☑️ | ☑️ | ☑️ | 4.76+ | 1.1.18 |
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*/
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export default {
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// components:{
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// pickerItem
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// },
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data() {
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return {
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wrapTotalWidth: 0,
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nowValue: [] as string[],
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_modelValueIndex: [] as number[],
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okNodeInfo: false,
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tid: 0,
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parentIndex: 0,
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resizeTid: 0
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}
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},
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emits: [
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/**
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* 选项变化时触发
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* @param {string[]} ids - 当前选中项的id
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*/
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'change',
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/**
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* 等同v-model:model-str
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* 只对外输出当前回选区的选中项的文本，不要外部改变此值。
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*/
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'update:modelStr',
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'update:modelValue'
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],
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props: {
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/**
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* 数据项
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* 格式类型为：PICKER_ITEM_INFO
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*/
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list: {
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type: Array as PropType<PICKER_ITEM_INFO[]>,
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default: () : PICKER_ITEM_INFO[] => [] as PICKER_ITEM_INFO[]
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},
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/**
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* 数据项,这是内部使用的以提高数据的转换性能。如果你确定你提供的是这个类型，可以赋值此值，避免转换时间。
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* 格式类型为：X_PICKER_X_ITEM
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* 数据如果超过1mb不要去转换，最后直接从后台提供string然后直接JSON.getArray<X_PICKER_X_ITEM>(data)赋值到值。
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* 这样性能在安卓上可以提高到好多。
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*/
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listPro: {
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type: Array as PropType<X_PICKER_X_ITEM[]>,
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default: () : X_PICKER_X_ITEM[] => [] as X_PICKER_X_ITEM[]
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},
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/**
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* 当前选中项的id值
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*/
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modelValue: {
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type: Array as PropType<string[]>,
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default: () : string[] => [] as string[]
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},
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/**
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* 当前选中项的标题文本组
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*/
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modelStr: {
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type: String,
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default: ""
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},
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/**
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* 显示在顶部的单位名称
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*/
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cellUnits: {
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type: Array as PropType<string[]>,
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default: () : string[] => [] as string[]
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},
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unitsFontSize:{
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type:String,
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default:'12'
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},
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/**
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* 项目的字体号大小
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*/
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fontSize: {
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type: String,
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default: "16"
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},
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// 滑动项目时停止的动画时间
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duration: {
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type: Number,
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default: 300
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},
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// 摩擦系数,就是指当你用力滑动时，滑动的缓动距离效果
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// 为了解决动画不停止无法选中的原生问题，我这个是重写的
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// 动画只是展示效果，事实上是结果是先知的。
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threshold: {
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type: Number,
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default: 0.9
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},
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/**
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* 自动同步modelstr拼接时的符号.
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*/
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modelStrJoin:{
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type:String,
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default:","
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},
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},
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mounted() {
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this.oninitFun();
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uni.$on('onResize',this.onResize)
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},
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watch: {
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modelValue(newValue : string[]) {
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if (newValue.join('') == this.nowValue.join('')) return;
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this.nowValue = newValue;
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this._modelValueIndex = this.chuliIndex(this.getIdeByindex());
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this.setChangeStrvmodel()
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}
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},
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beforeUnmount() {
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clearTimeout(this.tid);
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clearTimeout(this.resizeTid);
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uni.$off('onResize',this.onResize)
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},
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computed: {
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_cellUnits() : string[] {
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return this.cellUnits as string[]
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},
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_list() : X_PICKER_X_ITEM[] {
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if (this.listPro.length > 0) return this.listPro;
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return this.normalizeList(this.list as PICKER_ITEM_INFO[])
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},
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_maxDeep() : number {
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if (this._list.length == 0) return 0;
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return this.getDepth(this._list);
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},
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_deepWidth() : number {
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if (this._list.length == 0) return this.wrapTotalWidth;
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const depth = this.getDepth(this._list);
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return this.wrapTotalWidth / Math.max(1, depth)
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},
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},
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methods: {
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normalizeList(tree : PICKER_ITEM_INFO[]) : X_PICKER_X_ITEM[] {
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let nowlist = [] as X_PICKER_X_ITEM[]
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for (let i = 0; i < tree.length; i++) {
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const node = tree[i];
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const disabled = (node.disabled == null ? false : (node.disabled! as boolean));
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const id = (node.id == null ? i.toString() : (node.id! as string));
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const children = (node.children == null ? ([] as PICKER_ITEM_INFO[]) : (node.children! as PICKER_ITEM_INFO[]));
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let item = {
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id: id,
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title: node.title,
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disabled: disabled,
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children: [] as X_PICKER_X_ITEM[]
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} as X_PICKER_X_ITEM
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if (children.length > 0) {
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item.children = this.normalizeList(children)
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}
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nowlist.push(item)
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}
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return nowlist
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},
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getDepth(list : X_PICKER_X_ITEM[]) : number {
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let deepIndex = 1;
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const node = list[0];
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if (node.children.length > 0) {
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deepIndex += this.getDepth(node.children);
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}
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return deepIndex;
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},
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setChangeStrvmodel(){
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let listitem = this.getModelStr()
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let idvalue = [] as string[]
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let strs = [] as string[]
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listitem.forEach((el) => {
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idvalue.push(el.id)
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strs.push(el.title)
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})
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this.$emit('update:modelStr', strs.join(this.modelStrJoin))
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},
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oninitFun(){
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this.nowValue = this.modelValue.slice(0)
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this._modelValueIndex = this.chuliIndex(this.getIdeByindex());
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this.setChangeStrvmodel()
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this.getNodeInfo();
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},
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onResize(){
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this.getNodeInfoDebounced()
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},
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change(ids : number[]) {
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this._modelValueIndex = ids;
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let listitem = this.getModelStr()
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let idvalue = [] as string[]
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let strs = [] as string[]
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listitem.forEach((el) => {
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idvalue.push(el.id)
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strs.push(el.title)
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})
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/**
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* 等同v-model
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*/
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this.$emit('update:modelValue', idvalue)
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this.$emit('update:modelStr', strs.join(this.modelStrJoin))
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if (idvalue.join('') == this.modelValue.join('')) return;
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let t = this;
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clearTimeout(this.tid);
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t.tid = setTimeout(function () {
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/**
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* 选项变化时触发
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* @param {string[]} ids 当前选中项的id
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*/
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t.$emit('change', idvalue)
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}, 30);
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},
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chuliIndex(indexs : number[]) : number[] {
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let ids = indexs.slice(0)
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let val = this.nowValue.slice(0)
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for (let i = 0; i < this._maxDeep; i++) {
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if (i >= val.length) {
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ids.push(0)
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}
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}
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return ids;
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},
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getIdeByindex() : number[] {
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let index = 0;
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let val = this.nowValue.slice(0)
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let indexs = [] as number[]
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function getIndex(nodes : X_PICKER_X_ITEM[]) {
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if (val.length <= index || val.length == 0) return;
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let id = val[index]
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let sindex = 0
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for (let i = 0; i < nodes.length; i++) {
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let item = nodes[i]
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if (item.id == id) {
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sindex = i;
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indexs.push(sindex)
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if (item.children.length > 0) {
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index += 1
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getIndex(item.children)
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}
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}
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}
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}
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getIndex(this._list)
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return indexs;
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},
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getModelStr() : X_PICKER_X_ITEM[] {
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let ids = this._modelValueIndex.slice(0)
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let index = 0;
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let _this = this;
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let selectedList = [] as X_PICKER_X_ITEM[]
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function getStr(nodes : X_PICKER_X_ITEM[]) {
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if (ids.length <= index || ids.length == 0) return;
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let idx = ids[index]
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idx = Math.max(0, Math.min(nodes.length - 1, idx));
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let item = nodes[idx];
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selectedList.push(item)
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if (item.children.length > 0) {
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index += 1
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getStr(item.children)
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}
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}
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getStr(this._list)
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return selectedList
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},
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conutChangeEnd(n : number) {
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},
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getNodeInfo() {
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uni.createSelectorQuery().in(this)
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.select(".xPickerView")
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.boundingClientRect().exec((ret) => {
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let nodeinfo = ret[0] as NodeInfo
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let w = nodeinfo.width!
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if (w != this.wrapTotalWidth) {
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this.wrapTotalWidth = w
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}
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if (!this.okNodeInfo) {
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this.okNodeInfo = true;
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}
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})
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}
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,
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getNodeInfoDebounced(){
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let t = this;
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clearTimeout(this.resizeTid)
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this.resizeTid = setTimeout(function(){
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t.getNodeInfo()
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},100)
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}
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},
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}
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</script>
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<template>
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<view class="xPickerView" ref="xPickerView">
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<x-picker-item :unitsFontSize="unitsFontSize" @countChange="conutChangeEnd" :duration="duration" :threshold="threshold" :font-size="fontSize"
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:cellUnits="_cellUnits" v-if="okNodeInfo" @changeDeep="change" :selectedIndex="_modelValueIndex"
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:parentIndex="parentIndex" :wrapWight="_deepWidth" :list="_list" class="xPickerViewItem"></x-picker-item>
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</view>
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</template>
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<style scoped>
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.xPickerView {
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/* display: flex; */
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}
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</style>
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Reference in New Issue
Block a user