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import type { ExtractPropTypes, PropType } from 'vue';
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import type { Shape } from '../../types/global';
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import { baseProps } from '../common/props';
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/**
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* RadioProps 单选框 props 类型定义
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* @description 单选框用于有一个选择，用户只能选择其中一个的场景。搭配u-radio-group使用
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*/
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export const RadioProps = {
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...baseProps,
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label: { type: String, default: '' },
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value: { type: [String, Number] as PropType<string | number>, default: '' },
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/** radio的名称 */
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name: { type: [String, Number] as PropType<string | number>, default: '' },
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/** 形状，square为方形，circle为圆形 */
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shape: { type: String as PropType<Shape>, default: '' },
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/** 是否禁用 */
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disabled: { type: [String, Boolean] as PropType<string | boolean>, default: '' },
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/** 是否禁止点击提示语选中复选框 */
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labelDisabled: { type: [String, Boolean] as PropType<string | boolean>, default: '' },
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/** 选中状态下的颜色，如设置此值，将会覆盖parent的activeColor值 */
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activeColor: { type: String, default: '' },
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/** 图标的大小，单位rpx */
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iconSize: { type: [String, Number] as PropType<number | string>, default: '' },
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/** label的字体大小，rpx单位 */
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labelSize: { type: [String, Number] as PropType<number | string>, default: '' }
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};
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export type RadioProps = ExtractPropTypes<typeof RadioProps>;
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<template>
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<view class="u-radio" :style="$u.toStyle(radioStyle, customStyle)" :class="customClass">
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<view class="u-radio__icon-wrap" @tap="toggle" :class="iconClass" :style="$u.toStyle(iconStyle)">
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<u-icon class="u-radio__icon-wrap__icon" name="checkbox-mark" :size="elIconSize" :color="iconColor" />
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</view>
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<view
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class="u-radio__label"
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@tap="onClickLabel"
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:style="{
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fontSize: $u.addUnit(labelSize)
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}"
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>
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<slot>
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{{ label }}
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</slot>
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</view>
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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: 'u-radio',
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options: {
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addGlobalClass: true,
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// #ifndef MP-TOUTIAO
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virtualHost: true,
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// #endif
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styleIsolation: 'shared'
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}
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};
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</script>
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<script setup lang="ts">
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import { computed } from 'vue';
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import { $u, useChildren } from '../..';
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import { RadioProps } from './types';
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/**
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* radio 单选框
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* @description 单选框用于有一个选择，用户只能选择其中一个的场景。搭配u-radio-group使用
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* @tutorial https://uviewpro.cn/zh/components/radio.html
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* @property {String|Number} icon-size 图标大小，单位rpx（默认24）
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* @property {String|Number} label-size label字体大小，单位rpx（默认28）
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* @property {String|Number} name radio组件的标示符
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* @property {String} shape 形状，见上方说明（默认circle）
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* @property {Boolean} disabled 是否禁用（默认false）
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* @property {Boolean} label-disabled 点击文本是否可以操作radio（默认true）
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* @property {String} active-color 选中时的颜色，如设置parent的active-color将失效
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* @event {Function} change 某个radio状态发生变化时触发(选中状态)
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* @example <u-radio :label-disabled="false">门掩黄昏，无计留春住</u-radio>
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*/
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const props = defineProps(RadioProps);
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const emit = defineEmits(['change']);
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// 使用组件关系 hooks 获取父组件
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const { parentExposed } = useChildren('u-radio', 'u-radio-group');
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// radio 的value值，id
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const radioValue = computed(() => {
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if (props.value !== '') return props.value;
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return props.name;
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});
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// 父组件的默认值（兼容没有父组件的场景）
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const parentData = computed(() => {
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return (
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parentExposed?.value?.getData?.() || {
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iconSize: null,
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labelDisabled: null,
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disabled: null,
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shape: null,
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activeColor: null,
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size: null,
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width: null,
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height: null,
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value: null,
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wrap: null
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}
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);
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});
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/**
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* 是否禁用，如果父组件u-radio-group禁用的话，将会忽略子组件的配置
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*/
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const elDisabled = computed(() =>
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props.disabled !== '' ? props.disabled : parentData.value.disabled !== null ? parentData.value.disabled : false
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);
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/**
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* 是否禁用label点击
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*/
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const elLabelDisabled = computed(() =>
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props.labelDisabled !== ''
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? props.labelDisabled
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: parentData.value.labelDisabled !== null
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? parentData.value.labelDisabled
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: false
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);
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/**
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* 组件尺寸，对应size的值，默认值为34rpx
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* 兼容无size属性场景
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*/
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const elSize = computed(() => {
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// 若props无size，直接用默认值
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// 兼容老代码，parentData.value.size 可能不存在
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return (props as any).size ? (props as any).size : parentData.value.size ? parentData.value.size : 34;
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});
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/**
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* 组件的勾选图标的尺寸，默认20
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*/
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const elIconSize = computed(() =>
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props.iconSize ? props.iconSize : parentData.value.iconSize ? parentData.value.iconSize : 20
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);
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/**
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* 组件选中激活时的颜色
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*/
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const elActiveColor = computed(() =>
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props.activeColor ? props.activeColor : parentData.value.activeColor ? parentData.value.activeColor : 'primary'
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);
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/**
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* 组件的形状
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*/
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const elShape = computed(() =>
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props.shape ? props.shape : parentData.value.shape ? parentData.value.shape : 'circle'
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);
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/**
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* 设置radio的状态，要求radio的name等于parent的value时才为选中状态
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*/
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const iconStyle = computed(() => {
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let style: Record<string, string> = {};
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if (elActiveColor.value && parentData.value.value == radioValue.value && !elDisabled.value) {
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style.borderColor = elActiveColor.value;
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style.backgroundColor = elActiveColor.value;
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}
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style.width = $u.addUnit(elSize.value);
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style.height = $u.addUnit(elSize.value);
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return style;
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});
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const iconColor = computed(() => (radioValue.value == parentData.value.value ? 'var(--u-white-color)' : 'transparent'));
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const iconClass = computed(() => {
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let classes: string[] = [];
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classes.push('u-radio__icon-wrap--' + elShape.value);
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if (radioValue.value == parentData.value.value) classes.push('u-radio__icon-wrap--checked');
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if (elDisabled.value) classes.push('u-radio__icon-wrap--disabled');
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if (radioValue.value == parentData.value.value && elDisabled.value)
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classes.push('u-radio__icon-wrap--disabled--checked');
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// 支付宝小程序无法动态绑定一个数组类名，否则解析出来的结果会带有","，而导致失效
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return classes.join(' ');
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});
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const radioStyle = computed(() => {
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let style: Record<string, string> = {};
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if (parentData.value.width) {
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style.width = $u.addUnit(parentData.value.width);
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// #ifdef MP
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// 各家小程序因为它们特殊的编译结构，使用float布局
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style.float = 'left';
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// #endif
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// #ifndef MP
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// H5和APP使用flex布局
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style.flex = `0 0 ${$u.addUnit(parentData.value.width)}`;
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// #endif
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}
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if (parentData.value.wrap) {
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style.width = '100%';
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// #ifndef MP
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// H5和APP使用flex布局，将宽度设置100%，即可自动换行
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style.flex = '0 0 100%';
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// #endif
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}
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return style;
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});
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/**
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* 点击label
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*/
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function onClickLabel() {
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if (!elLabelDisabled.value && !elDisabled.value) {
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setRadioCheckedStatus();
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}
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}
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/**
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* 点击icon
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*/
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function toggle() {
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if (!elDisabled.value) {
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setRadioCheckedStatus();
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}
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}
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/**
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* 发出事件
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*/
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function emitEvent() {
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// u-radio的name不等于父组件的v-model的值时(意味着未选中)，才发出事件，避免多次点击触发事件
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if (parentData.value.value != radioValue.value) emit('change', radioValue.value);
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}
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/**
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* 改变组件选中状态
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* 这里的改变的依据是，更改本组件的parentData.value值为本组件的name值，同时通过父组件遍历所有u-radio实例
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* 将本组件外的其他u-radio的parentData.value都设置为空(由computed计算后，都被取消选中状态)，因而只剩下一个为选中状态
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*/
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function setRadioCheckedStatus() {
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emitEvent();
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parentExposed?.value?.setValue(radioValue.value);
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}
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</script>
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<style lang="scss" scoped>
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@import '../../libs/css/style.components.scss';
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.u-radio {
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/* #ifndef APP-NVUE */
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display: inline-flex;
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/* #endif */
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align-items: center;
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overflow: hidden;
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user-select: none;
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line-height: 1.8;
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&__icon-wrap {
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color: $u-content-color;
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@include vue-flex;
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flex: none;
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align-items: center;
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justify-content: center;
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box-sizing: border-box;
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width: 42rpx;
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height: 42rpx;
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color: transparent;
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text-align: center;
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transition-property: color, border-color, background-color;
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font-size: 20px;
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border: 1px solid var(--u-border-color);
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transition-duration: 0.2s;
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/* #ifdef MP-TOUTIAO */
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// 头条小程序兼容性问题，需要设置行高为0，否则图标偏下
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&__icon {
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line-height: 0;
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}
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/* #endif */
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&--circle {
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border-radius: 100%;
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}
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&--square {
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border-radius: 3px;
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}
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&--checked {
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color: var(--u-white-color);
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background-color: $u-type-primary;
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border-color: $u-type-primary;
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}
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&--disabled {
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background-color: var(--u-bg-gray-light);
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border-color: var(--u-border-color);
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}
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&--disabled--checked {
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color: var(--u-bg-gray-light) !important;
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}
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}
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&__label {
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word-wrap: break-word;
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margin-left: 10rpx;
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margin-right: 24rpx;
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color: $u-content-color;
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font-size: 30rpx;
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&--disabled {
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color: var(--u-bg-gray-light);
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}
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}
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}
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</style>
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