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- import { VantComponent } from '../common/component';
- var FieldName;
- (function (FieldName) {
- FieldName["TEXT"] = "text";
- FieldName["VALUE"] = "value";
- FieldName["CHILDREN"] = "children";
- })(FieldName || (FieldName = {}));
- const defaultFieldNames = {
- text: FieldName.TEXT,
- value: FieldName.VALUE,
- children: FieldName.CHILDREN,
- };
- VantComponent({
- props: {
- title: String,
- value: {
- type: String,
- },
- placeholder: {
- type: String,
- value: '请选择',
- },
- activeColor: {
- type: String,
- value: '#1989fa',
- },
- options: {
- type: Array,
- value: [],
- },
- swipeable: {
- type: Boolean,
- value: false,
- },
- closeable: {
- type: Boolean,
- value: true,
- },
- showHeader: {
- type: Boolean,
- value: true,
- },
- closeIcon: {
- type: String,
- value: 'cross',
- },
- fieldNames: {
- type: Object,
- value: defaultFieldNames,
- observer: 'updateFieldNames',
- },
- useTitleSlot: Boolean,
- },
- data: {
- tabs: [],
- activeTab: 0,
- textKey: FieldName.TEXT,
- valueKey: FieldName.VALUE,
- childrenKey: FieldName.CHILDREN,
- innerValue: '',
- },
- watch: {
- options() {
- this.updateTabs();
- },
- value(newVal) {
- this.updateValue(newVal);
- },
- },
- created() {
- this.updateTabs();
- },
- methods: {
- updateValue(val) {
- if (val !== undefined) {
- const values = this.data.tabs.map((tab) => tab.selected && tab.selected[this.data.valueKey]);
- if (values.indexOf(val) > -1) {
- return;
- }
- }
- this.innerValue = val;
- this.updateTabs();
- },
- updateFieldNames() {
- const { text = 'text', value = 'value', children = 'children', } = this.data.fieldNames || defaultFieldNames;
- this.setData({
- textKey: text,
- valueKey: value,
- childrenKey: children,
- });
- },
- getSelectedOptionsByValue(options, value) {
- for (let i = 0; i < options.length; i++) {
- const option = options[i];
- if (option[this.data.valueKey] === value) {
- return [option];
- }
- if (option[this.data.childrenKey]) {
- const selectedOptions = this.getSelectedOptionsByValue(option[this.data.childrenKey], value);
- if (selectedOptions) {
- return [option, ...selectedOptions];
- }
- }
- }
- },
- updateTabs() {
- const { options } = this.data;
- const { innerValue } = this;
- if (!options.length) {
- return;
- }
- if (innerValue !== undefined) {
- const selectedOptions = this.getSelectedOptionsByValue(options, innerValue);
- if (selectedOptions) {
- let optionsCursor = options;
- const tabs = selectedOptions.map((option) => {
- const tab = {
- options: optionsCursor,
- selected: option,
- };
- const next = optionsCursor.find((item) => item[this.data.valueKey] === option[this.data.valueKey]);
- if (next) {
- optionsCursor = next[this.data.childrenKey];
- }
- return tab;
- });
- if (optionsCursor) {
- tabs.push({
- options: optionsCursor,
- selected: null,
- });
- }
- this.setData({
- tabs,
- });
- wx.nextTick(() => {
- this.setData({
- activeTab: tabs.length - 1,
- });
- });
- return;
- }
- }
- this.setData({
- tabs: [
- {
- options,
- selected: null,
- },
- ],
- activeTab: 0,
- });
- },
- onClose() {
- this.$emit('close');
- },
- onClickTab(e) {
- const { index: tabIndex, title } = e.detail;
- this.$emit('click-tab', { title, tabIndex });
- this.setData({
- activeTab: tabIndex,
- });
- },
-
- onSelect(e) {
- const { option, tabIndex } = e.currentTarget.dataset;
- if (option && option.disabled) {
- return;
- }
- const { valueKey, childrenKey } = this.data;
- let { tabs } = this.data;
- tabs[tabIndex].selected = option;
- if (tabs.length > tabIndex + 1) {
- tabs = tabs.slice(0, tabIndex + 1);
- }
- if (option[childrenKey]) {
- const nextTab = {
- options: option[childrenKey],
- selected: null,
- };
- if (tabs[tabIndex + 1]) {
- tabs[tabIndex + 1] = nextTab;
- }
- else {
- tabs.push(nextTab);
- }
- wx.nextTick(() => {
- this.setData({
- activeTab: tabIndex + 1,
- });
- });
- }
- this.setData({
- tabs,
- });
- const selectedOptions = tabs.map((tab) => tab.selected).filter(Boolean);
- const value = option[valueKey];
- const params = {
- value,
- tabIndex,
- selectedOptions,
- };
- this.innerValue = value;
- this.$emit('change', params);
- if (!option[childrenKey]) {
- this.$emit('finish', params);
- }
- },
- },
- });
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