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<template>
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<view
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:class="`wd-picker ${disabled ? 'is-disabled' : ''} ${size ? 'is-' + size : ''} ${cell.border.value ? 'is-border' : ''} ${
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alignRight ? 'is-align-right' : ''
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} ${error ? 'is-error' : ''} ${customClass}`"
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>
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<!--文案-->
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<view class="wd-picker__field" @click="showPopup">
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<slot v-if="useDefaultSlot"></slot>
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<view v-else class="wd-picker__cell">
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<view
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v-if="label || useLabelSlot"
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:class="`wd-picker__label ${customLabelClass} ${isRequired ? 'is-required' : ''}`"
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:style="labelWidth ? 'min-width:' + labelWidth + ';max-width:' + labelWidth + ';' : ''"
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>
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<template v-if="label">{{ label }}</template>
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<slot v-else name="label"></slot>
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</view>
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<view class="wd-picker__body">
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<view class="wd-picker__value-wraper">
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<view :class="`wd-picker__value ${ellipsis && 'is-ellipsis'} ${customValueClass} ${showValue ? '' : 'wd-picker__placeholder'}`">
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{{ showValue ? showValue : placeholder }}
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</view>
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<wd-icon v-if="!disabled && !readonly" custom-class="wd-picker__arrow" name="arrow-right" />
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</view>
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<view v-if="errorMessage" class="wd-picker__error-message">{{ errorMessage }}</view>
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</view>
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</view>
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</view>
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<!--弹出层，picker-view 在隐藏时修改值，会触发多次change事件，从而导致所有列选中第一项，因此picker在关闭时不隐藏 -->
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<wd-popup
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v-model="popupShow"
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position="bottom"
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:hide-when-close="false"
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:close-on-click-modal="closeOnClickModal"
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:z-index="zIndex"
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:safe-area-inset-bottom="safeAreaInsetBottom"
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@close="onCancel"
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custom-class="wd-picker__popup"
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>
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<view class="wd-picker__wraper">
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<!--toolBar-->
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<view class="wd-picker__toolbar" @touchmove="noop">
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<!--取消按钮-->
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<view class="wd-picker__action wd-picker__action--cancel" @click="onCancel">
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{{ cancelButtonText }}
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</view>
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<!--标题-->
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<view v-if="title" class="wd-picker__title">{{ title }}</view>
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<!--确定按钮-->
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<view :class="`wd-picker__action ${isLoading ? 'is-loading' : ''}`" @click="onConfirm">
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{{ confirmButtonText }}
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</view>
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</view>
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<!--pickerView-->
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<wd-picker-view
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ref="pickerViewWd"
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:custom-class="customViewClass"
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v-model="pickerValue"
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:columns="displayColumns"
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:loading="isLoading"
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:loading-color="loadingColor"
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:columns-height="columnsHeight"
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:value-key="valueKey"
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:label-key="labelKey"
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@change="pickerViewChange"
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@pickstart="onPickStart"
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@pickend="onPickEnd"
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:column-change="columnChange"
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/>
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</view>
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</wd-popup>
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</view>
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</template>
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<script lang="ts">
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export default {
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name: 'wd-picker',
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options: {
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virtualHost: true,
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addGlobalClass: true,
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styleIsolation: 'shared'
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}
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}
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</script>
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<script lang="ts" setup>
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import { getCurrentInstance, onBeforeMount, ref, watch, computed, onMounted, nextTick } from 'vue'
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import { deepClone, defaultDisplayFormat, getType, isDef } from '../common/util'
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import { useCell } from '../composables/useCell'
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import { type ColumnItem, formatArray } from '../wd-picker-view/type'
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import { FORM_KEY, type FormItemRule } from '../wd-form/types'
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import { useParent } from '../composables/useParent'
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interface Props {
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customClass?: string
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customLabelClass?: string
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customValueClass?: string
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customViewClass?: string
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// 选择器左侧文案
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label?: string
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// 选择器占位符
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placeholder?: string
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// 禁用
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disabled?: boolean
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// 只读
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readonly?: boolean
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loading?: boolean
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loadingColor?: string
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/* popup */
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// 弹出层标题
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title?: string
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// 取消按钮文案
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cancelButtonText?: string
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// 确认按钮文案
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confirmButtonText?: string
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// 是否必填
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required?: boolean
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size?: string
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labelWidth?: string
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useDefaultSlot?: boolean
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useLabelSlot?: boolean
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error?: boolean
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alignRight?: boolean
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// eslint-disable-next-line @typescript-eslint/ban-types
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beforeConfirm?: Function
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closeOnClickModal?: boolean
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safeAreaInsetBottom?: boolean
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ellipsis?: boolean
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// 选项总高度
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columnsHeight?: number
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// 选项对象中，value对应的 key
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valueKey?: string
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// 选项对象中，展示的文本对应的 key
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labelKey?: string
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// 初始值
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modelValue?: string | number | Array<string | number>
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// 选择器数据
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columns?: Array<string | number | ColumnItem | Array<string | number | ColumnItem>>
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// 多级联动
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// eslint-disable-next-line @typescript-eslint/ban-types
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columnChange?: Function
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// 外部展示格式化函数
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// eslint-disable-next-line @typescript-eslint/ban-types
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displayFormat?: Function
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// 自定义层级
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zIndex?: number
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prop?: string
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rules?: FormItemRule[]
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}
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const props = withDefaults(defineProps<Props>(), {
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modelValue: '',
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customClass: '',
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customViewClass: '',
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customLabelClass: '',
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customValueClass: '',
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// 选择器占位符
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placeholder: '请选择',
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// 禁用
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disabled: false,
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// 只读
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readonly: false,
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loading: false,
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loadingColor: '#4D80F0',
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// 取消按钮文案
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cancelButtonText: '取消',
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// 确认按钮文案
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confirmButtonText: '完成',
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// 是否必填
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required: false,
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useDefaultSlot: false,
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useLabelSlot: false,
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error: false,
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alignRight: false,
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closeOnClickModal: true,
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safeAreaInsetBottom: true,
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ellipsis: false,
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columnsHeight: 217,
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valueKey: 'value',
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labelKey: 'label',
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columns: () => [],
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zIndex: 15,
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rules: () => []
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})
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const pickerViewWd = ref<any>(null)
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const cell = useCell()
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const innerLoading = ref<boolean>(false) // 内部控制是否loading
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// 弹出层是否显示
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const popupShow = ref<boolean>(false)
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// 选定后展示的选中项
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const showValue = ref<string>('')
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const pickerValue = ref<string | number | boolean | (string | number | boolean)[]>('')
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const displayColumns = ref<Array<string | number | ColumnItem | Array<string | number | ColumnItem>>>([]) // 传入 pickerView 的columns
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const resetColumns = ref<Array<string | number | ColumnItem | Array<string | number | ColumnItem>>>([]) // 保存之前的 columns，当取消时，将数据源回滚，避免多级联动数据源不正确的情况
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const isPicking = ref<boolean>(false) // 判断pickview是否还在滑动中
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const hasConfirmed = ref<boolean>(false) // 判断用户是否点击了确认按钮
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const isLoading = computed(() => {
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return props.loading || innerLoading.value
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})
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watch(
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() => props.displayFormat,
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(fn) => {
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if (fn && getType(fn) !== 'function') {
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console.error('The type of displayFormat must be Function')
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}
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if (pickerViewWd.value && pickerViewWd.value.selectedIndex && pickerViewWd.value.selectedIndex.length !== 0) {
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if (props.modelValue) {
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setShowValue(pickerViewWd.value.getSelects())
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} else {
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showValue.value = ''
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}
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}
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},
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{
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immediate: true,
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deep: true
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}
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)
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watch(
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() => props.modelValue,
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(newValue) => {
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pickerValue.value = newValue
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// 获取初始选中项,并展示初始选中文案
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if (isDef(newValue)) {
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if (pickerViewWd.value && pickerViewWd.value.getSelects) {
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nextTick(() => {
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setShowValue(pickerViewWd.value!.getSelects())
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})
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} else {
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setShowValue(getSelects(props.modelValue))
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}
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} else {
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showValue.value = ''
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}
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},
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{
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deep: true,
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immediate: true
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}
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)
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watch(
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() => props.columns,
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(newValue) => {
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displayColumns.value = newValue
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resetColumns.value = newValue
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// 获取初始选中项,并展示初始选中文案
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if (props.modelValue) {
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if (pickerViewWd.value && pickerViewWd.value.getSelects) {
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nextTick(() => {
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setShowValue(pickerViewWd.value!.getSelects())
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})
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} else {
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setShowValue(getSelects(props.modelValue))
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}
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} else {
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showValue.value = ''
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}
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},
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{
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deep: true,
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immediate: true
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}
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)
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watch(
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() => props.columnChange,
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(newValue) => {
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if (newValue && getType(newValue) !== 'function') {
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console.error('The type of columnChange must be Function')
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}
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},
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{
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deep: true,
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immediate: true
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}
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)
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const { parent: form } = useParent(FORM_KEY)
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// 表单校验错误信息
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const errorMessage = computed(() => {
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if (form && props.prop && form.errorMessages && form.errorMessages[props.prop]) {
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return form.errorMessages[props.prop]
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} else {
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return ''
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}
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})
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// 是否展示必填
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const isRequired = computed(() => {
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let formRequired = false
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if (form && form.props.rules) {
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const rules = form.props.rules
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for (const key in rules) {
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if (Object.prototype.hasOwnProperty.call(rules, key) && key === props.prop && Array.isArray(rules[key])) {
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formRequired = rules[key].some((rule: FormItemRule) => rule.required)
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}
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}
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}
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return props.required || props.rules.some((rule) => rule.required) || formRequired
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})
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const { proxy } = getCurrentInstance() as any
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const emit = defineEmits(['confirm', 'open', 'cancel', 'update:modelValue'])
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onMounted(() => {
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props.modelValue && setShowValue(getSelects(props.modelValue))
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if (props.modelValue && pickerViewWd.value && pickerViewWd.value.getSelects) {
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setShowValue(pickerViewWd.value!.getSelects())
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}
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})
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onBeforeMount(() => {
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displayColumns.value = deepClone(props.columns)
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resetColumns.value = deepClone(props.columns)
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})
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/**
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* @description 根据传入的value，picker组件获取当前cell展示值。
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* @param {String|Number|Array<String|Number|Array<any>>}value
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*/
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function getSelects(value) {
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const formatColumns = formatArray(props.columns, props.valueKey, props.labelKey)
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if (props.columns.length === 0) return
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// 使其默认选中首项
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if (value === '' || value === null || value === undefined || (getType(value) === 'array' && value.length === 0)) {
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value = formatColumns.map((col) => {
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return col[0][props.valueKey]
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})
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}
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const valueType = getType(value)
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const type = ['string', 'number', 'boolean', 'array']
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if (type.indexOf(valueType) === -1) return []
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/**
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* 1.单key转为Array<key>
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* 2.根据formatColumns的长度截取Array<String>，保证下面的遍历不溢出
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* 3.根据每列的key值找到选项中value为此key的下标并记录
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*/
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value = value instanceof Array ? value : [value]
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value = value.slice(0, formatColumns.length)
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if (value.length === 0) {
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value = formatColumns.map(() => 0)
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}
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let selected: number[] = []
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value.forEach((target, col) => {
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let row = formatColumns[col].findIndex((row) => {
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return row[props.valueKey].toString() === target.toString()
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})
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row = row === -1 ? 0 : row
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selected.push(row)
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})
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const selects = selected.map((row, col) => formatColumns[col][row])
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// 单列选择器，则返回单项
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if (selects.length === 1) {
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return selects[0]
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}
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return selects
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}
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// 对外暴露方法，打开弹框
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function open() {
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showPopup()
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}
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// 对外暴露方法，关闭弹框
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function close() {
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onCancel()
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}
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|
/**
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|
* @description 展示popup，小程序有个bug，在picker-view弹出时设置value，会触发change事件，而且会将picker-view的value多次触发change重置为第一项
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*/
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function showPopup() {
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if (props.disabled || props.readonly) return
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emit('open')
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popupShow.value = true
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pickerValue.value = props.modelValue
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displayColumns.value = resetColumns.value
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}
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/**
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* @description 点击取消按钮触发。关闭popup，触发cancel事件。
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|
*/
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function onCancel() {
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popupShow.value = false
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emit('cancel')
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}
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|
|
/**
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|
* @description 点击确定按钮触发。展示选中值，触发cancel事件。
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|
*/
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|
function onConfirm() {
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|
if (isLoading.value) return
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|
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// 如果当前还在滑动且未停止下来，则锁住先不确认，等滑完再自动确认，避免pickview值未更新
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|
|
if (isPicking.value) {
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hasConfirmed.value = true
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return
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}
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|
|
const { beforeConfirm } = props
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|
|
if (beforeConfirm && getType(beforeConfirm) === 'function') {
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|
|
beforeConfirm(
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|
pickerValue.value,
|
|
|
(isPass) => {
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|
|
isPass && handleConfirm()
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|
},
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|
|
proxy.$.exposed
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|
|
)
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|
} else {
|
|
|
handleConfirm()
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|
|
}
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|
|
}
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|
|
function handleConfirm() {
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|
|
if (isLoading.value || props.disabled) {
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|
|
popupShow.value = false
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|
|
return
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|
|
}
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|
|
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const selects = pickerViewWd.value!.getSelects()
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const values = pickerViewWd.value!.getValues()
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|
// 获取当前的数据源，并设置给 resetColumns，用于取消时可以回退数据源
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|
const columns = pickerViewWd.value!.getColumnsData()
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|
popupShow.value = false
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|
resetColumns.value = deepClone(columns)
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|
emit('update:modelValue', values)
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|
setShowValue(selects)
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|
emit('confirm', {
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|
|
value: values,
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|
|
selectedItems: selects
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|
|
})
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|
|
}
|
|
|
/**
|
|
|
* @description 初始change事件
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|
|
* @param event
|
|
|
*/
|
|
|
function pickerViewChange({ value }) {
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|
|
pickerValue.value = value
|
|
|
}
|
|
|
/**
|
|
|
* @description 设置展示值
|
|
|
* @param {Array<String>} items
|
|
|
*/
|
|
|
function setShowValue(items) {
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|
|
// 避免值为空时调用自定义展示函数
|
|
|
if ((items instanceof Array && !items.length) || !items) return
|
|
|
|
|
|
const { valueKey, labelKey } = props
|
|
|
showValue.value = (props.displayFormat || defaultDisplayFormat)(items, { valueKey, labelKey })
|
|
|
}
|
|
|
function noop() {}
|
|
|
function onPickStart() {
|
|
|
isPicking.value = true
|
|
|
}
|
|
|
function onPickEnd() {
|
|
|
isPicking.value = false
|
|
|
|
|
|
if (hasConfirmed.value) {
|
|
|
hasConfirmed.value = false
|
|
|
onConfirm()
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 外部设置是否loading
|
|
|
* @param loading 是否loading
|
|
|
*/
|
|
|
function setLoading(loading: boolean) {
|
|
|
innerLoading.value = loading
|
|
|
}
|
|
|
|
|
|
defineExpose({
|
|
|
close,
|
|
|
open,
|
|
|
setLoading
|
|
|
})
|
|
|
</script>
|
|
|
<style lang="scss" scoped>
|
|
|
@import './index.scss';
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|
|
</style>
|