<template>
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<view
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class="u-slider"
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:style="[addStyle(customStyle)]"
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>
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<template v-if="!useNative || isRange">
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<view ref="u-slider-inner" class="u-slider-inner" @click="onClick"
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@onTouchStart="onTouchStart2($event, 1)" @touchmove="onTouchMove2($event, 1)"
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@touchend="onTouchEnd2($event, 1)" @touchcancel="onTouchEnd2($event, 1)"
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:class="[disabled ? 'u-slider--disabled' : '']" :style="{
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height: (isRange && showValue) ? (getPx(blockSize) + 24) + 'px' : (getPx(blockSize)) + 'px',
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}"
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>
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<view ref="u-slider__base"
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class="u-slider__base"
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:style="[
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{
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height: height,
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backgroundColor: inactiveColor
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}
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]"
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>
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</view>
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<view
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@click="onClick"
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class="u-slider__gap"
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:style="[
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barStyle,
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{
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height: height,
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marginTop: '-' + height,
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backgroundColor: activeColor
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}
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]"
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>
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</view>
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<view v-if="isRange"
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class="u-slider__gap u-slider__gap-0"
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:style="[
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barStyle0,
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{
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height: height,
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marginTop: '-' + height,
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backgroundColor: inactiveColor
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}
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]"
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>
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</view>
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<text v-if="isRange && showValue"
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class="u-slider__show-range-value" :style="{left: (getPx(barStyle0.width) + getPx(blockSize)/2) + 'px'}">
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{{ this.rangeValue[0] }}
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</text>
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<text v-if="isRange && showValue"
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class="u-slider__show-range-value" :style="{left: (getPx(barStyle.width) + getPx(blockSize)/2) + 'px'}">
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{{ this.rangeValue[1] }}
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</text>
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<template v-if="isRange">
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<view class="u-slider__button-wrap u-slider__button-wrap-0" @touchstart="onTouchStart($event, 0)"
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@touchmove="onTouchMove($event, 0)" @touchend="onTouchEnd($event, 0)"
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@touchcancel="onTouchEnd($event, 0)" :style="{left: (getPx(barStyle0.width) + getPx(blockSize)/2) + 'px'}">
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<slot name="min" v-if="$slots.min || $slots.$min"/>
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<view v-else class="u-slider__button" :style="[blockStyle, {
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height: getPx(blockSize, true),
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width: getPx(blockSize, true),
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backgroundColor: blockColor
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}]"></view>
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</view>
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</template>
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<view class="u-slider__button-wrap" @touchstart="onTouchStart"
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@touchmove="onTouchMove" @touchend="onTouchEnd"
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@touchcancel="onTouchEnd" :style="{left: (getPx(barStyle.width) + getPx(blockSize)/2) + 'px'}">
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<slot name="max" v-if="isRange && ($slots.max || $slots.$max)"/>
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<slot v-else-if="$slots.default || $slots.$default"/>
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<view v-else class="u-slider__button" :style="[blockStyle, {
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height: getPx(blockSize, true),
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width: getPx(blockSize, true),
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backgroundColor: blockColor
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}]"></view>
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</view>
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</view>
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<view class="u-slider__show-value" v-if="showValue && !isRange">{{ modelValue }}</view>
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</template>
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<slider
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class="u-slider__native"
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v-else
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:min="min"
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:max="max"
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:step="step"
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:value="modelValue"
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:activeColor="activeColor"
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:backgroundColor="inactiveColor"
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:blockSize="getPx(blockSize)"
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:blockColor="blockColor"
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:showValue="showValue"
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:disabled="disabled"
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@changing="changingHandler"
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@change="changeHandler"
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></slider>
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</view>
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</template>
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<script>
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import { props } from './props';
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import { mpMixin } from '../../libs/mixin/mpMixin';
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import { mixin } from '../../libs/mixin/mixin';
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import { addStyle, getPx, sleep } from '../../libs/function/index.js';
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// #ifdef APP-NVUE
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const dom = uni.requireNativePlugin('dom')
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// #endif
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/**
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* slider 滑块选择器
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* @tutorial https://uview-plus.jiangruyi.com/components/slider.html
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* @property {Number | String} value 滑块默认值（默认0）
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* @property {Number | String} min 最小值（默认0）
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* @property {Number | String} max 最大值（默认100）
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* @property {Number | String} step 步长（默认1）
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* @property {Number | String} blockWidth 滑块宽度，高等于宽（30）
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* @property {Number | String} height 滑块条高度，单位rpx（默认6）
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* @property {String} inactiveColor 底部条背景颜色（默认#c0c4cc）
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* @property {String} activeColor 底部选择部分的背景颜色（默认#2979ff）
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* @property {String} blockColor 滑块颜色（默认#ffffff）
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* @property {Object} blockStyle 给滑块自定义样式，对象形式
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* @property {Boolean} disabled 是否禁用滑块(默认为false)
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* @event {Function} changing 正在滑动中
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* @event {Function} change 滑动结束
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* @example <up-slider v-model="value" />
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*/
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export default {
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name: 'u-slider',
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mixins: [mpMixin, mixin, props],
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emits: ["start", "changing", "change", "update:modelValue"],
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data() {
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return {
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startX: 0,
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status: 'end',
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newValue: 0,
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distanceX: 0,
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startValue0: 0,
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startValue: 0,
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barStyle0: {},
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barStyle: {},
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sliderRect: {
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left: 0,
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width: 0
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}
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};
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},
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watch: {
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// #ifdef VUE3
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modelValue(n) {
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// 只有在非滑动状态时，才可以通过value更新滑块值，这里监听，是为了让用户触发
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if(this.status == 'end') this.updateValue(this.modelValue, false);
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},
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// #endif
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// #ifdef VUE2
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value(n) {
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// 只有在非滑动状态时，才可以通过value更新滑块值，这里监听，是为了让用户触发
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if(this.status == 'end') this.updateValue(this.value, false);
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},
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// #endif
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rangeValue:{
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handler(n){
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if(this.status == 'end'){
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this.updateValue(this.rangeValue[0], false, 0);
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this.updateValue(this.rangeValue[1], false, 1);
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}
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},
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deep:true
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}
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},
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created() {
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},
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async mounted() {
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// 获取滑块条的尺寸信息
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if (!this.useNative) {
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// #ifndef APP-NVUE
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this.$uGetRect('.u-slider__base').then(rect => {
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this.sliderRect = rect;
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// console.log('sliderRect', this.sliderRect)
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if (this.sliderRect.width == 0) {
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console.info('如在弹窗等元素中使用，请使用v-if来显示滑块，否则无法计算长度。')
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}
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this.init()
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});
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// #endif
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// #ifdef APP-NVUE
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await sleep(30) // 不延迟会出现size获取都为0的问题
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const ref = this.$refs['u-slider__base']
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ref &&
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dom.getComponentRect(ref, (res) => {
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// console.log(res)
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this.sliderRect = {
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left: res.size.left,
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width: res.size.width
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};
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this.init()
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})
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// #endif
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}
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},
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methods: {
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addStyle,
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getPx,
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init() {
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if (this.isRange) {
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this.updateValue(this.rangeValue[0], false, 0);
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this.updateValue(this.rangeValue[1], false, 1);
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} else {
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// #ifdef VUE3
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this.updateValue(this.modelValue, false);
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// #endif
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// #ifdef VUE2
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this.updateValue(this.value, false);
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// #endif
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}
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},
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// native拖动过程中触发
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changingHandler(e) {
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const {
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value
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} = e.detail
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// 更新v-model的值
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// #ifdef VUE3
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this.$emit("update:modelValue", value);
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// #endif
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// #ifdef VUE2
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this.$emit("input", value);
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// #endif
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// 触发事件
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this.$emit('changing', value)
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},
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// native滑动结束时触发
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changeHandler(e) {
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const {
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value
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} = e.detail
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// 更新v-model的值
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// #ifdef VUE3
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this.$emit("update:modelValue", value);
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// #endif
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// #ifdef VUE2
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this.$emit("input", value);
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// #endif
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// 触发事件
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this.$emit('change', value);
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},
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onTouchStart(event, index = 1) {
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if (this.disabled) return;
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this.startX = 0;
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// 触摸点集
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let touches = event.touches[0];
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// 触摸点到屏幕左边的距离
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this.startX = touches.clientX;
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// 此处的this.modelValue虽为props值，但是通过$emit('update:modelValue')进行了修改
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if (this.isRange) {
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this.startValue0 = this.format(this.rangeValue[0], 0);
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this.startValue = this.format(this.rangeValue[1], 1);
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} else {
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// #ifdef VUE3
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this.startValue = this.format(this.modelValue);
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// #endif
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// #ifdef VUE2
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this.startValue = this.format(this.value);
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// #endif
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}
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// 标示当前的状态为开始触摸滑动
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this.status = 'start';
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let clientX = 0;
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// #ifndef APP-NVUE
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clientX = touches.clientX;
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// #endif
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// #ifdef APP-NVUE
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clientX = touches.screenX;
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// #endif
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this.distanceX = clientX - this.sliderRect.left;
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// 获得移动距离对整个滑块的值，此为带有多位小数的值，不能用此更新视图
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// 否则造成通信阻塞，需要每改变一个step值时修改一次视图
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this.newValue = ((this.distanceX / this.sliderRect.width) * (this.max - this.min)) + parseFloat(this.min);
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this.status = 'moving';
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// 发出moving事件
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let $crtFmtValue = this.updateValue(this.newValue, true, index);
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this.$emit('changing', $crtFmtValue);
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},
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onTouchMove(event, index = 1) {
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if (this.disabled) return;
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// 连续触摸的过程会一直触发本方法，但只有手指触发且移动了才被认为是拖动了，才发出事件
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// 触摸后第一次移动已经将status设置为moving状态，故触摸第二次移动不会触发本事件
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if (this.status == 'start') this.$emit('start');
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let touches = event.touches[0];
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// console.log('touchs', touches)
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// 滑块的左边不一定跟屏幕左边接壤，所以需要减去最外层父元素的左边值
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let clientX = 0;
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// #ifndef APP-NVUE
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clientX = touches.clientX;
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// #endif
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// #ifdef APP-NVUE
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clientX = touches.screenX;
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// #endif
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this.distanceX = clientX - this.sliderRect.left;
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// 获得移动距离对整个滑块的值，此为带有多位小数的值，不能用此更新视图
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// 否则造成通信阻塞，需要每改变一个step值时修改一次视图
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this.newValue = ((this.distanceX / this.sliderRect.width) * (this.max - this.min)) + parseFloat(this.min);
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this.status = 'moving';
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// 发出moving事件
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let $crtFmtValue = this.updateValue(this.newValue, true, index);
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this.$emit('changing', $crtFmtValue);
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},
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onTouchEnd(event, index = 1) {
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if (this.disabled) return;
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if (this.status === 'moving') {
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let $crtFmtValue = this.updateValue(this.newValue, false, index);
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this.$emit('change', $crtFmtValue);
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}
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this.status = 'end';
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},
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onTouchStart2(event, index = 1) {
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if (!this.isRange) {
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// this.onChangeStart(event, index);
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}
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},
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onTouchMove2(event, index = 1) {
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if (!this.isRange) {
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// this.onTouchMove(event, index);
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}
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},
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onTouchEnd2(event, index = 1) {
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if (!this.isRange) {
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// this.onTouchEnd(event, index);
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}
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},
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onClick(event) {
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// if (this.isRange) return;
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if (this.disabled) return;
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// 直接点击滑块的情况，计算方式与onTouchMove方法相同
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// console.log('click', event)
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// #ifndef APP-NVUE
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// nvue下暂时无法获取坐标
|
let clientX = event.detail.x - this.sliderRect.left
|
this.newValue = ((clientX / this.sliderRect.width) * (this.max - this.min)) + parseFloat(this.min);
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this.updateValue(this.newValue, false, 1);
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// #endif
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},
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updateValue(value, drag, index = 1) {
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// 去掉小数部分，同时也是对step步进的处理
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let valueFormat = this.format(value, index);
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// 不允许滑动的值超过max最大值
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if(valueFormat > this.max ) {
|
valueFormat = this.max
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}
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// 设置移动的距离，不能用百分比，因为NVUE不支持。
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let width = Math.min((valueFormat - this.min) / (this.max - this.min) * this.sliderRect.width, this.sliderRect.width)
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let barStyle = {
|
width: width + 'px'
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};
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// 移动期间无需过渡动画
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if (drag == true) {
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barStyle.transition = 'none';
|
} else {
|
// 非移动期间，删掉对过渡为空的声明，让css中的声明起效
|
delete barStyle.transition;
|
}
|
// 修改value值
|
if (this.isRange) {
|
this.rangeValue[index] = valueFormat;
|
this.$emit("update:modelValue", this.rangeValue);
|
} else {
|
// #ifdef VUE3
|
this.$emit("update:modelValue", valueFormat);
|
// #endif
|
// #ifdef VUE2
|
this.$emit("input", valueFormat);
|
// #endif
|
}
|
|
switch (index) {
|
case 0:
|
this.barStyle0 = {...barStyle};
|
break;
|
case 1:
|
this.barStyle = {...barStyle};
|
break;
|
default:
|
break;
|
}
|
if (this.isRange) {
|
return this.rangeValue
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} else {
|
return valueFormat
|
}
|
},
|
format(value, index = 1) {
|
// 将小数变成整数，为了减少对视图的更新，造成视图层与逻辑层的阻塞
|
if (this.isRange) {
|
switch (index) {
|
case 0:
|
return Math.round(
|
Math.max(this.min, Math.min(value, this.rangeValue[1] - parseInt(this.step),this.max))
|
/ parseInt(this.step)
|
) * parseInt(this.step);
|
break;
|
case 1:
|
return Math.round(
|
Math.max(this.min, this.rangeValue[0] + parseInt(this.step), Math.min(value, this.max))
|
/ parseInt(this.step)
|
) * parseInt(this.step);
|
break;
|
default:
|
break;
|
}
|
} else {
|
return Math.round(
|
Math.max(this.min, Math.min(value, this.max))
|
/ parseInt(this.step)
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) * parseInt(this.step);
|
}
|
}
|
}
|
}
|
</script>
|
|
<style lang="scss" scoped>
|
@import "../../libs/css/components.scss";
|
.u-slider {
|
position: relative;
|
display: flex;
|
flex-direction: row;
|
align-items: center;
|
|
&__native {
|
flex: 1;
|
}
|
|
&-inner {
|
flex: 1;
|
display: flex;
|
flex-direction: column;
|
position: relative;
|
border-radius: 999px;
|
padding: 10px 18px;
|
justify-content: center;
|
}
|
|
&__show-value {
|
margin: 10px 18px 10px 0px;
|
}
|
|
&__show-range-value {
|
padding-top: 2px;
|
font-size: 12px;
|
line-height: 12px;
|
position: absolute;
|
bottom: 0;
|
}
|
|
&__base {
|
background-color: #ebedf0;
|
}
|
|
/* #ifndef APP-NVUE */
|
&-inner:before {
|
position: absolute;
|
right: 0;
|
left: 0;
|
content: '';
|
top: -8px;
|
bottom: -8px;
|
z-index: -1;
|
}
|
/* #endif */
|
|
&__gap {
|
position: relative;
|
border-radius: 999px;
|
transition: width 0.2s;
|
background-color: #1989fa;
|
}
|
|
&__button {
|
width: 24px;
|
height: 24px;
|
border-radius: 50%;
|
box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
|
background-color: #fff;
|
transform: scale(0.9);
|
/* #ifdef H5 */
|
cursor: pointer;
|
/* #endif */
|
}
|
|
&__button-wrap {
|
position: absolute;
|
// transform: translate3d(50%, -50%, 0);
|
}
|
|
&--disabled {
|
opacity: 0.5;
|
}
|
}
|
</style>
|
