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372 lines
13 KiB
372 lines
13 KiB
<template>
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<view class="cj-slider" @mousemove="onSliMouseMove" @mouseup="onSliMouseUp">
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<view class="mouse-move" :style="{height: moveHeight + 'rpx'}"></view>
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<view class="cj-slider__line" :class="[disabled ? 'cj-slider--disabled' : '']" :style="{
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backgroundColor: inactiveColor,
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height: height + 'rpx'
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}" style="border-radius: 8px;" ></view>
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<view class="cj-slider__gap" :style="[
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barStyle,
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{
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height: height + 'rpx',
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backgroundColor: activeColor
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}
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]" style="border-radius: 8px;">
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<!-- <view class="cj-slider__button-wrap" @mousedown="onMouseDown(1, $event)" @mousemove="onMouseMove($event)"
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@mouseleave="onMouseLeave(1)" @mouseup="onMouseUp(1)" @touchstart="onTouchStart(1, $event)"
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@touchmove="onTouchMove(1, $event)" @touchend="onTouchEnd(1)" @touchcancel="onTouchEnd">
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<slot v-if="$slots.default || $slots.$default" />
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<view v-else class="cj-slider__button" :style="[blockStyle, {
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height: blockWidth + 'rpx',
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width: blockWidth + 'rpx',
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backgroundColor: blockColor
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}]"></view>
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</view> -->
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<view class="cj-slider__button-wrap2" @mousedown="onMouseDown(2, $event)" @mousemove="onMouseMove($event)"
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@mouseleave="onMouseLeave(2)" @mouseup="onMouseUp(2)" @touchstart="onTouchStart(2, $event)"
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@touchmove="onTouchMove(2, $event)" @touchend="onTouchEnd(2)" @touchcancel="onTouchEnd">
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<slot v-if="$slots.default || $slots.$default" />
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<view v-else class="cj-slider__button" :style="[blockStyle, {
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height: blockWidth + 'rpx',
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width: blockWidth + 'rpx',
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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>
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</template>
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<script>
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/**
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* slider 滑块选择器
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* @property {Number | String} value 滑块默认值（默认[最小值,最大值]）
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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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* @property {Number | String} moveHeight 鼠标离开滑块仍可滑动的区域高度，单位rpx(默认100)
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* @event {Function} start 滑动触发
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* @event {Function} moving 正在滑动中
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* @event {Function} end 滑动结束
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* @example <cj-slider v-model="value" />
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*/
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export default {
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name: 'cj-slider',
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props: {
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// 当前进度百分比值
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value: {
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type: Array,
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default: []
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},
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// 是否禁用滑块
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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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// 滑块宽度，高等于宽，单位rpx
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blockWidth: {
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type: [Number, String],
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default: 30
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},
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// 最小值
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min: {
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type: [Number, String],
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default: 0
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},
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// 最大值
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max: {
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type: [Number, String],
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default: 100
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},
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// 步进值
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step: {
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type: [Number, String],
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default: 1
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},
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// 滑块条高度，单位rpx
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height: {
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type: [Number, String],
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default: 20
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},
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// 进度条的激活部分颜色
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activeColor: {
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type: String,
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default: '#f3b43f'
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},
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// 进度条的背景颜色
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inactiveColor: {
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type: String,
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default: '#f5f6f4'
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},
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// 滑块的背景颜色
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blockColor: {
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type: String,
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default: '#ffffff'
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},
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// 用户对滑块的自定义颜色
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blockStyle: {
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type: Object,
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default () {
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return {};
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}
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},
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// 鼠标可离开滑块后仍能滑动的范围高度
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moveHeight: {
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type: [Number, String],
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default: '60'
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}
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},
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data() {
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return {
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mouseLeave: false, // 鼠标移出了滑块
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mouseType: 1, // 1 左滑块 2 右滑块
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mouseDown: false, // 鼠标按下
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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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startValue: 0,
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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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created() {
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// 如果不是长度为2的数组,默认值为[最小值, 最大值]
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if (Object.prototype.toString.call(this.value) == '[object Array]' && this.value.length === 2) {
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this.updateValue(this.value[0], this.value[1], false);
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} else {
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this.$emit('input', Array(this.min, this.max))
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}
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},
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mounted() {
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// 获取滑块条的尺寸信息
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this.$uGetRect('.cj-slider').then(rect => {
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this.sliderRect = rect;
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});
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},
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methods: {
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onTouchStart(type, event) {
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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.value虽为props值，但是通过$emit('input')进行了修改
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this.startValue = type === 1 ? this.format(this.value[0]) : this.format(this.value[1]);
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// 标示当前的状态为开始触摸滑动
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this.status = 'start';
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},
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onMouseDown(type, event) {
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if (this.disabled) return;
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this.mouseDown = true;
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this.mouseType = type
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this.startX = event.clientX || 0;
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this.startValue = type === 1 ? this.format(this.value[0]) : this.format(this.value[1]);
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this.status = 'start';
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},
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onTouchMove(type, event) {
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if (this.disabled) return;
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// 连续触摸的过程会一直触发本方法，但只有手指触发且移动了才被认为是拖动了，才发出事件
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// 触摸后第一次移动已经将status设置为moving状态，故触摸第二次移动不会触发本事件
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if (this.status == 'start') this.$emit('start');
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let touches = event.touches[0]
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// 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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this.distanceX = touches.clientX - this.sliderRect.left
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// 获得移动距离对整个滑块的百分比值，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) + this.min
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this.status = 'moving'
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// 发出moving事件
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this.$emit('moving');
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if (type === 1) {
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this.updateValue(this.newValue, this.format(this.value[1]), true);
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} else {
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this.updateValue(this.format(this.value[0]), this.newValue, true);
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}
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},
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onMouseMove(event) {
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if (!this.mouseDown) return;
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if (this.disabled) return;
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if (this.status == 'start') this.$emit('start');
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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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this.distanceX = event.clientX - this.sliderRect.left
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// 获得移动距离对整个滑块的百分比值，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) + this.min
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this.status = 'moving'
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// 发出moving事件
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this.$emit('moving');
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if (this.mouseType === 1) {
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this.updateValue(this.newValue, this.format(this.value[1]), true);
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} else {
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this.updateValue(this.format(this.value[0]), this.newValue, true);
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}
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},
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onMouseLeave(type) {
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this.mouseLeave = true
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},
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onTouchEnd(type) {
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if (this.disabled) return;
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if (this.status === 'moving') {
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if (type === 1) {
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this.updateValue(this.newValue, this.format(this.value[1]), true);
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} else {
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this.updateValue(this.format(this.value[0]), this.newValue, true);
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}
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this.$emit('end');
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}
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this.status = 'end';
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},
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onMouseUp(type) {
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this.mouseDown = false;
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this.mouseLeave = false;
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if (this.disabled) return;
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if (this.status === 'moving') {
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if (type === 1) {
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this.updateValue(this.newValue, this.format(this.value[1]), true);
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} else {
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this.updateValue(this.format(this.value[0]), this.newValue, true);
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}
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this.$emit('end');
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}
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this.status = 'end';
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},
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onSliMouseUp() {
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// 鼠标在滑块范围内松开
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this.mouseDown = false;
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this.mouseLeave = false;
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},
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onSliMouseMove(e) {
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// 监听整个滑动内的鼠标移动，因为PC端只能监听到小滑块内的移动，移动过快鼠标移出了小滑块则移动失败。
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if (!this.mouseDown) return;
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if (!this.mouseLeave) return;
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this.onMouseMove(e)
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},
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updateValue(value, value2, drag) {
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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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const widthB1 = this.format(value)
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const widthB2 = this.format(value2)
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const widthB1B = Math.round((widthB1 - this.min) * 100 / (this.max - this.min))
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const widthB2B = Math.round((widthB2 - this.min) * 100 / (this.max - this.min))
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// 不允许滑动的值超过max最大值，百分比也不能超过100
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if (widthB1 > widthB2 || widthB2 > this.max || widthB2B > 100) return;
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// 设置移动的百分比值
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let barStyle = {
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width: widthB2B - widthB1B + '%',
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left: widthB1B + '%',
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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';
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} else {
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// 非移动期间，删掉对过渡为空的声明，让css中的声明起效
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delete barStyle.transition;
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}
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// 修改value值，这里使用change改变，使用input H5桌面端会卡死，
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this.$emit('input', Array(widthB1, widthB2));
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this.barStyle = barStyle;
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},
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format(value) {
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// 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
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return Math.round(Math.max(this.min, Math.min(value, this.max)) / this.step) * this.step;
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},
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onClick(event) {
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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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const widthB1 = this.value[0]
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const widthB2 = this.value[1]
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const value = this.format(((event.detail.x - this.sliderRect.left) / this.sliderRect.width) * (this.max - this
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.min) +
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this.min);
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if (value < widthB1 || (value - widthB1) <= (widthB2 - value)) {
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// 点击位置在左滑块的左边 || 点击位置在中间，且靠近左滑块 => 移动左滑块到该位置
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this.updateValue(value, widthB2, false)
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} else {
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// 点击位置在右滑块的右边 || 点击位置在中间，且靠近右滑块 => 移动右滑块到该位置
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this.updateValue(widthB1, value, false)
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}
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},
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$uGetRect(selector, all) {
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// $uGetRect为uView自带的节点查询简化方法
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return new Promise(resolve => {
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uni.createSelectorQuery().
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in(this)[all ? 'selectAll' : 'select'](selector)
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.boundingClientRect(rect => {
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if (all && Array.isArray(rect) && rect.length) {
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resolve(rect)
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}
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if (!all && rect) {
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resolve(rect)
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}
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})
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.exec()
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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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.cj-slider {
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position: relative;
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// background-color: #ebedf0;
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&__line {
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position: absolute;
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width: 100%;
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background-color: #ebedf0;
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}
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&__gap {
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position: relative;
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// 动画有bug，暂时取消
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// transition: width 0.2s;
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background-color: #1989fa;
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}
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&__button {
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width: 24px;
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height: 24px;
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border-radius: 50%;
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box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
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background-color: #fff;
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cursor: pointer;
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}
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&__button-wrap {
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position: absolute;
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top: 50%;
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left: 0;
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transform: translate3d(-50%, -50%, 0);
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}
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&__button-wrap2 {
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position: absolute;
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top: 50%;
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right: 0;
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transform: translate3d(50%, -50%, 0);
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}
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}
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.cj-slider--disabled {
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opacity: 0.5;
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}
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.mouse-move {
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position: fixed;
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left: 0;
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right: 0;
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transform: translateY(-50%);
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opacity: 0;
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}
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</style>
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