272 lines
		
	
	
		
			7.8 KiB
		
	
	
	
		
			Vue
		
	
	
	
		
		
			
		
	
	
			272 lines
		
	
	
		
			7.8 KiB
		
	
	
	
		
			Vue
		
	
	
	
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								<template>
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									<view class="u-radio" :style="[radioStyle]">
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										<view class="u-radio__icon-wrap" @tap="toggle" :class="[iconClass]" :style="[iconStyle]">
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											<u-icon
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												class="u-radio__icon-wrap__icon"
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											    name="checkbox-mark"
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											    :size="elIconSize" 
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												:color="iconColor"/>
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										</view>
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										<view class="u-radio__label" @tap="onClickLabel" :style="{
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											fontSize: $u.addUnit(labelSize)
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										}">
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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>
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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://www.uviewui.com/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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									export default {
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										name: "u-radio",
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										props: {
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											// radio的名称
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											name: {
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												type: [String, Number],
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												default: ''
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											},
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											// 形状,square为方形,circle为原型
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											shape: {
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												type: String,
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												default: ''
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											},
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											// 是否禁用
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											disabled: {
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												type: [String, Boolean],
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												default: ''
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											},
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											// 是否禁止点击提示语选中复选框
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											labelDisabled: {
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												type: [String, Boolean],
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												default: ''
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											},
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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: {
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												type: String,
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												default: ''
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											},
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											// 图标的大小,单位rpx
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											iconSize: {
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												type: [String, Number],
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												default: ''
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											},
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											// label的字体大小,rpx单位
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											labelSize: {
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												type: [String, Number],
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												default: ''
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											},
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										},
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										data() {
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											return {
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												// 父组件的默认值,因为头条小程序不支持在computed中使用this.parent.shape的形式
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												// 故只能使用如此方法
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												parentData: {
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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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										created() {
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											this.parent = false;
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											// 支付宝小程序不支持provide/inject,所以使用这个方法获取整个父组件,在created定义,避免循环引用
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											this.updateParentData();
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											this.parent.children.push(this);
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										},
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										computed: {
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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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											elDisabled() {
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												return this.disabled !== '' ? this.disabled : this.parentData.disabled !== null ? this.parentData.disabled : false;
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											},
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											// 是否禁用label点击
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											elLabelDisabled() {
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												return this.labelDisabled !== '' ? this.labelDisabled : this.parentData.labelDisabled !== null ? this.parentData.labelDisabled : false;
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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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											elSize() {
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												return this.size ? this.size : (this.parentData.size ? this.parentData.size : 34);
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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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											elIconSize() {
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												return this.iconSize ? this.iconSize : (this.parentData.iconSize ? this.parentData.iconSize : 20);
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											},
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											// 组件选中激活时的颜色
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											elActiveColor() {
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												return this.activeColor ? this.activeColor : (this.parentData.activeColor ? this.parentData.activeColor : 'primary');
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											},
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											// 组件的形状
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											elShape() {
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												return this.shape ? this.shape : (this.parentData.shape ? this.parentData.shape : 'circle');
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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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											iconStyle() {
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												let style = {};
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												if (this.elActiveColor && this.parentData.value == this.name && !this.elDisabled) {
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													style.borderColor = this.elActiveColor;
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													style.backgroundColor = this.elActiveColor;
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												}
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												style.width = this.$u.addUnit(this.elSize);
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												style.height = this.$u.addUnit(this.elSize);
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												return style;
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											},
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											iconColor() {
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												return this.name ==  this.parentData.value ? '#ffffff' : 'transparent';
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											},
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											iconClass() {
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												let classes = [];
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												classes.push('u-radio__icon-wrap--' + this.elShape);
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												if (this.name == this.parentData.value) classes.push('u-radio__icon-wrap--checked');
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												if (this.elDisabled) classes.push('u-radio__icon-wrap--disabled');
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												if (this.name == this.parentData.value && this.elDisabled) classes.push(
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													'u-radio__icon-wrap--disabled--checked');
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												// 支付宝小程序无法动态绑定一个数组类名,否则解析出来的结果会带有",",而导致失效
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												return classes.join(' ');
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											},
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											radioStyle() {
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												let style = {};
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												if (this.parentData.width) {
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													style.width = this.$u.addUnit(this.parentData.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 ${this.$u.addUnit(this.parentData.width)}`;
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													// #endif
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												}
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												if (this.parentData.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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										methods: {
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											updateParentData() {
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												this.getParentData('u-radio-group');
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											},
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											onClickLabel() {
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												if (!this.elLabelDisabled && !this.elDisabled) {
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													this.setRadioCheckedStatus();
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												}
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											},
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											toggle() {
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												if (!this.elDisabled) {
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													this.setRadioCheckedStatus();
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												}
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											},
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											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(this.parentData.value != this.name) this.$emit('change', this.name);
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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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											setRadioCheckedStatus() {
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												this.emitEvent();
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												if(this.parent) {
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													this.parent.setValue(this.name);
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													this.parentData.value = this.name;
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												}
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											}
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										}
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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 #c8c9cc;
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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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								 | 
							
											}
							 | 
						|||
| 
								 | 
							
											
							 | 
						|||
| 
								 | 
							
											&--square {
							 | 
						|||
| 
								 | 
							
												border-radius: 3px;
							 | 
						|||
| 
								 | 
							
											}
							 | 
						|||
| 
								 | 
							
											
							 | 
						|||
| 
								 | 
							
											&--checked {
							 | 
						|||
| 
								 | 
							
												color: #fff;
							 | 
						|||
| 
								 | 
							
												background-color: #2979ff;
							 | 
						|||
| 
								 | 
							
												border-color: #2979ff;
							 | 
						|||
| 
								 | 
							
											}
							 | 
						|||
| 
								 | 
							
											
							 | 
						|||
| 
								 | 
							
											&--disabled {
							 | 
						|||
| 
								 | 
							
												background-color: #ebedf0;
							 | 
						|||
| 
								 | 
							
												border-color: #c8c9cc;
							 | 
						|||
| 
								 | 
							
											}
							 | 
						|||
| 
								 | 
							
											
							 | 
						|||
| 
								 | 
							
											&--disabled--checked {
							 | 
						|||
| 
								 | 
							
												color: #c8c9cc !important;
							 | 
						|||
| 
								 | 
							
											}
							 | 
						|||
| 
								 | 
							
										}
							 | 
						|||
| 
								 | 
							
										
							 | 
						|||
| 
								 | 
							
										&__label {
							 | 
						|||
| 
								 | 
							
											word-wrap: break-word;
							 | 
						|||
| 
								 | 
							
											margin-left: 10rpx;
							 | 
						|||
| 
								 | 
							
											margin-right: 24rpx;
							 | 
						|||
| 
								 | 
							
											color: $u-content-color;
							 | 
						|||
| 
								 | 
							
											font-size: 30rpx;
							 | 
						|||
| 
								 | 
							
											
							 | 
						|||
| 
								 | 
							
											&--disabled {
							 | 
						|||
| 
								 | 
							
												color: #c8c9cc;
							 | 
						|||
| 
								 | 
							
											}
							 | 
						|||
| 
								 | 
							
										}
							 | 
						|||
| 
								 | 
							
									}
							 | 
						|||
| 
								 | 
							
								</style>
							 |