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import type { ExtractPropTypes, PropType } from 'vue';
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import { baseProps } from '../common/props';
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/**
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* RateProps 评分组件 props 类型定义
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* @description 满意度调查、星型评分场景
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*/
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export const RateProps = {
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...baseProps,
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/** v-model双向绑定选中的星星数量 */
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modelValue: { type: [Number, String] as PropType<number | string>, default: -1 },
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/** 要显示的星星数量 */
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count: { type: [Number, String] as PropType<number | string>, default: 5 },
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/** 当前需要默认选中的星星(选中的个数) */
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current: { type: [Number, String] as PropType<number | string>, default: 0 },
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/** 是否不可选中 */
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disabled: { type: Boolean, default: false },
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/** 星星的大小,单位rpx */
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size: { type: [Number, String] as PropType<number | string>, default: 32 },
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/** 未选中时的颜色 */
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inactiveColor: { type: String, default: 'var(--u-light-color)' },
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/** 选中的颜色 */
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activeColor: { type: String, default: 'var(--u-type-error)' },
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/** 星星之间的间距,单位rpx */
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gutter: { type: [Number, String] as PropType<number | string>, default: 10 },
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/** 最少能选择的星星个数 */
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minCount: { type: [Number, String] as PropType<number | string>, default: 0 },
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/** 是否允许半星 */
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allowHalf: { type: Boolean, default: false },
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/** 选中时的图标(星星) */
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activeIcon: { type: String, default: 'star-fill' },
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/** 未选中时的图标(星星) */
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inactiveIcon: { type: String, default: 'star' },
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/** 自定义扩展前缀,方便用户扩展自己的图标库 */
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customPrefix: { type: String, default: 'uicon' },
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/** 分段颜色 */
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colors: { type: Array as PropType<string[]>, default: () => [] },
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/** 分段图标 */
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icons: { type: Array as PropType<string[]>, default: () => [] }
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};
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export type RateProps = ExtractPropTypes<typeof RateProps>;
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<template>
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<view
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class="u-rate"
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:class="customClass"
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:style="$u.toStyle(customStyle)"
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:id="elId"
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@touchmove.stop.prevent="touchMove"
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>
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<view class="u-star-wrap" v-for="(item, index) in count" :key="index" :class="[elClass]">
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<u-icon
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:name="String(Number(activeIndex) > Number(index) ? elActiveIcon : inactiveIcon)"
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@click="click(Number(index) + 1, $event)"
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:color="String(Number(activeIndex) > Number(index) ? elActiveColor : inactiveColor)"
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:custom-style="{
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fontSize: size + 'rpx',
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padding: `0 ${Number(gutter) / 2 + 'rpx'}`
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}"
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:custom-prefix="customPrefix"
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:show-decimal-icon="showDecimalIcon(Number(index))"
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:percent="decimal"
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:inactive-color="inactiveColor"
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></u-icon>
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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-rate',
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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 { ref, computed, watch, onMounted, getCurrentInstance } from 'vue';
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import { $u } from '../..';
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import { RateProps } from './types';
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/**
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* rate 评分
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* @description 该组件一般用于满意度调查,星型评分的场景
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* @tutorial https://uviewpro.cn/zh/components/rate.html
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* @property {String|Number} count 最多可选的星星数量(默认5)
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* @property {String|Number} current 默认选中的星星数量(默认0)
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* @property {Boolean} disabled 是否禁止用户操作(默认false)
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* @property {String|Number} size 星星的大小,单位rpx(默认32)
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* @property {String} inactive-color 未选中星星的颜色(默认var(--u-light-color))
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* @property {String} active-color 选中的星星颜色(默认var(--u-type-error))
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* @property {String} active-icon 选中时的图标名,只能为uView的内置图标(默认star-fill)
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* @property {String} inactive-icon 未选中时的图标名,只能为uView的内置图标(默认star)
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* @property {String|Number} gutter 星星之间的距离(默认10)
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* @property {String|Number} min-count 最少选中星星的个数(默认0)
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* @property {Boolean} allow-half 是否允许半星选择(默认false)
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* @event {Function} change 选中的星星发生变化时触发
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* @example <u-rate :count="count" :current="2"></u-rate>
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*/
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const props = defineProps(RateProps);
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const emit = defineEmits(['update:modelValue', 'change']);
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const instance = getCurrentInstance();
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// 生成唯一id,防止页面多个评分组件冲突
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const elId = ref($u.guid());
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const elClass = ref($u.guid());
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const starBoxLeft = ref(0); // 评分盒子左边到屏幕左边的距离
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const starWidth = ref(0); // 每个星星的宽度
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const starWidthArr = ref<number[]>([]); //每个星星最右边到组件盒子最左边的距离
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// 当前激活的星星的index,如果存在value,优先使用value,因为它可以双向绑定(1.4.5新增)
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const activeIndex = ref(Number(props.modelValue) !== -1 ? Number(props.modelValue) : Number(props.current));
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// 监听props变化,保持activeIndex同步
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watch(
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() => props.current,
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val => {
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activeIndex.value = Number(val);
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}
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);
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watch(
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() => props.modelValue,
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val => {
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activeIndex.value = Number(val);
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}
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);
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/**
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* 计算当前星星的显示小数部分(半星)
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*/
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const decimal = computed((): number => {
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if (props.disabled) {
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// 只在允许半星时才返回小数部分,否则始终为0
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if (props.allowHalf) {
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// 计算当前激活星星的小数部分(如3.5星,返回50)
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const val = Number(activeIndex.value);
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return (val - Math.floor(val)) * 100;
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}
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return 0;
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} else if (props.allowHalf) {
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// 允许半星时,返回50,否则0
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return 50;
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}
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return 0;
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});
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/**
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* 计算当前激活的图标
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*/
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const elActiveIcon = computed(() => {
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const len = props.icons.length;
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// 此处规则类似于下方的elActiveColor参数,都是根据一定的规则,显示不同的图标
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// 结果可能如此:icons参数传递了3个图标,当选中两个时,用第一个图标,4个时,用第二个图标
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// 第三个时,用第三个图标作为激活的图标
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if (len && len <= Number(props.count)) {
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const step = Math.round(Number(activeIndex.value) / Math.round(Number(props.count) / len));
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if (step < 1) return props.icons[0];
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if (step > len) return props.icons[len - 1];
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return props.icons[step - 1];
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}
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return props.activeIcon;
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});
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/**
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* 计算当前激活的颜色
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*/
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const elActiveColor = computed(() => {
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const len = props.colors.length;
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// 如果有设置colors参数(此参数用于将图标分段,比如一共5颗星,colors传3个颜色值,那么根据一定的规则,2颗星可能为第一个颜色
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// 4颗星为第二个颜色值,5颗星为第三个颜色值)
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if (len && len <= Number(props.count)) {
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const step = Math.round(Number(activeIndex.value) / Math.round(Number(props.count) / len));
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if (step < 1) return props.colors[0];
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if (step > len) return props.colors[len - 1];
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return props.colors[step - 1];
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}
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return props.activeColor;
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});
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/**
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* 获取评分组件盒子的布局信息
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*/
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function getElRectById() {
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// uView封装的获取节点的方法,详见文档
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$u.getRect('#' + elId.value, instance).then((res: any) => {
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starBoxLeft.value = res.left;
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});
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}
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/**
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* 获取单个星星的尺寸
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*/
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function getElRectByClass() {
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// uView封装的获取节点的方法,详见文档
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$u.getRect('.' + elClass.value, instance).then((res: any) => {
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starWidth.value = res.width;
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// 把每个星星右边到组件盒子左边的距离放入数组中
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for (let i = 0; i < Number(props.count); i++) {
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starWidthArr.value[i] = (i + 1) * starWidth.value;
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}
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});
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}
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/**
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* 手指滑动评分
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*/
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function touchMove(e: any) {
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if (props.disabled) {
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return;
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}
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if (!e.changedTouches[0]) {
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return;
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}
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const movePageX = e.changedTouches[0].pageX;
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// 滑动点相对于评分盒子左边的距离
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const distance = movePageX - starBoxLeft.value;
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// 如果滑动到了评分盒子的左边界,就设置为0星
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if (distance <= 0) {
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activeIndex.value = 0;
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}
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// 滑动的距离,相当于多少颗星星
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let index = Math.ceil(distance / starWidth.value);
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activeIndex.value = index > Number(props.count) ? Number(props.count) : index;
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// 对最少颗星星的限制
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if (activeIndex.value < Number(props.minCount)) activeIndex.value = Number(props.minCount);
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emitEvent();
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}
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/**
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* 通过点击,直接选中
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*/
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function click(index: number, e: any) {
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if (props.disabled) {
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return;
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}
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// 半星选择,尚未实现
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if (props.allowHalf) {
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// 预留半星实现
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}
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// 对第一个星星特殊处理,只有一个的时候,点击可以取消,否则无法作0星评价
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if (index == 1) {
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if (activeIndex.value == 1) {
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activeIndex.value = 0;
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} else {
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activeIndex.value = 1;
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}
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} else {
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activeIndex.value = index;
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}
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// 对最少颗星星的限制
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if (activeIndex.value < Number(props.minCount)) activeIndex.value = Number(props.minCount);
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emitEvent();
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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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// 发出change事件
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emit('change', activeIndex.value);
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// 同时修改双向绑定的value的值
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if (Number(props.modelValue) !== -1) {
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emit('update:modelValue', activeIndex.value);
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}
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}
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/**
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* 是否显示半星图标
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*/
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function showDecimalIcon(index: number) {
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return props.disabled && parseInt(String(activeIndex.value)) === index;
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}
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onMounted(() => {
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getElRectById();
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getElRectByClass();
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});
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</script>
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<style scoped lang="scss">
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@import '../../libs/css/style.components.scss';
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.u-rate {
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display: -webkit-inline-flex;
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display: inline-flex;
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align-items: center;
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margin: 0;
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padding: 0;
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}
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.u-icon {
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box-sizing: border-box;
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}
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</style>
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