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294 lines
8.0 KiB
294 lines
8.0 KiB
1 year ago
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<template>
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<view class="u-rate" :id="elId" @touchmove.stop.prevent="touchMove">
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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="activeIndex > index ? elActiveIcon : inactiveIcon"
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@click="click(index + 1, $event)"
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:color="activeIndex > index ? elActiveColor : inactiveColor"
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:custom-style="{
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fontSize: size + 'rpx',
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padding: `0 ${gutter / 2 + 'rpx'}`
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}"
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:custom-prefix="customPrefix"
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:show-decimal-icon="showDecimalIcon(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>/**
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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://www.uviewui.com/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#b2b2b2）
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* @property {String} active-color 选中的星星颜色（默认#FA3534）
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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} 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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export default {
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name: 'u-rate',
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emits: ["update:modelValue", "input", "change"],
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props: {
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// 用于v-model双向绑定选中的星星数量
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// 1.4.5版新增
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value: {
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type: [Number, String],
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default: -1
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},
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modelValue: {
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type: [Number, String],
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default: -1
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},
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// 要显示的星星数量
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count: {
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type: [Number, String],
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default: 5
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},
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// 当前需要默认选中的星星(选中的个数)
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// 1.4.5后通过value双向绑定，不再建议使用此参数
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current: {
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type: [Number, String],
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default: 0
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},
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// 是否不可选中
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disabled: {
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type: Boolean,
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default: false
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},
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// 星星的大小，单位rpx
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size: {
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type: [Number, String],
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default: 32
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},
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// 未选中时的颜色
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inactiveColor: {
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type: String,
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default: '#b2b2b2'
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},
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// 选中的颜色
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activeColor: {
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type: String,
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default: '#FA3534'
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},
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// 星星之间的间距，单位rpx
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gutter: {
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type: [Number, String],
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default: 10
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},
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// 最少能选择的星星个数
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minCount: {
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type: [Number, String],
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default: 0
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},
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// 是否允许半星(功能尚未实现)
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allowHalf: {
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type: Boolean,
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default: false
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},
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// 选中时的图标(星星)
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activeIcon: {
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type: String,
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default: 'star-fill'
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},
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// 未选中时的图标(星星)
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inactiveIcon: {
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type: String,
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default: 'star'
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},
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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: {
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type: String,
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default: 'uicon'
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},
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colors: {
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type: Array,
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default() {
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return []
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}
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},
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icons: {
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type: Array,
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default() {
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return []
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}
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}
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},
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data() {
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return {
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// 生成一个唯一id，否则一个页面多个评分组件，会造成冲突
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elId: this.$u.guid(),
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elClass: this.$u.guid(),
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starBoxLeft: 0, // 评分盒子左边到屏幕左边的距离，用于滑动选择时计算距离
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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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activeIndex: 0,
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starWidth: 0, // 每个星星的宽度
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starWidthArr: [] //每个星星最右边到组件盒子最左边的距离
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}
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},
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created() {
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this.activeIndex = this.valueCom != -1 ? this.valueCom : this.current;
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},
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watch: {
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current(val) {
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this.activeIndex = val
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},
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valueCom(val) {
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this.activeIndex = val
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}
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},
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computed: {
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valueCom() {
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// #ifndef VUE3
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return this.value;
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// #endif
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// #ifdef VUE3
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return this.modelValue;
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// #endif
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},
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decimal() {
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if (this.disabled) {
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return this.activeIndex * 100 % 100
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} else if (this.allowHalf) {
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return 50
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}
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},
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elActiveIcon() {
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const len = this.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 <= this.count) {
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const step = Math.round(this.activeIndex / Math.round(this.count / len))
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if (step < 1) return this.icons[0]
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if (step > len) return this.icons[len - 1]
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return this.icons[step - 1]
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}
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return this.activeIcon
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},
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elActiveColor() {
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const len = this.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 <= this.count) {
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const step = Math.round(this.activeIndex / Math.round(this.count / len))
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if (step < 1) return this.colors[0]
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if (step > len) return this.colors[len - 1]
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return this.colors[step - 1]
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}
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return this.activeColor
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}
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},
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methods: {
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// 获取评分组件盒子的布局信息
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getElRectById() {
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// uView封装的获取节点的方法，详见文档
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this.$uGetRect('#' + this.elId).then(res => {
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this.starBoxLeft = res.left
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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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getElRectByClass() {
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// uView封装的获取节点的方法，详见文档
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this.$uGetRect('.' + this.elClass).then(res => {
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this.starWidth = 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 < this.count; i++) {
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this.starWidthArr[i] = (i + 1) * this.starWidth
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}
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})
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},
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// 手指滑动
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touchMove(e) {
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if (this.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 - this.starBoxLeft
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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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this.activeIndex = 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 / this.starWidth)
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this.activeIndex = index > this.count ? this.count : index
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// 对最少颗星星的限制
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if (this.activeIndex < this.minCount) this.activeIndex = this.minCount
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this.emitEvent()
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},
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// 通过点击，直接选中
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click(index, e) {
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if (this.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 (this.allowHalf) {
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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 (this.activeIndex == 1) {
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this.activeIndex = 0
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} else {
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this.activeIndex = 1
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}
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} else {
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this.activeIndex = index
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}
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// 对最少颗星星的限制
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if (this.activeIndex < this.minCount) this.activeIndex = this.minCount
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this.emitEvent()
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},
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// 发出事件
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emitEvent() {
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// 发出change事件
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this.$emit('change', this.activeIndex)
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// 同时修改双向绑定的value的值
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if (this.valueCom != -1) {
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this.$emit('input', this.activeIndex)
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this.$emit("update:modelValue", this.activeIndex);
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}
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},
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showDecimalIcon(index) {
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return this.disabled && parseInt(this.activeIndex) === index
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}
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},
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mounted() {
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this.getElRectById()
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this.getElRectByClass()
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}
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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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