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+<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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+ }" @click="onClick"></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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+ ]" @click="onClick">
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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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+
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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: 6
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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: '#2979ff'
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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: '#c0c4cc'
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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: '500'
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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)
|
|
|
|
+ .boundingClientRect(rect => {
|
|
|
|
+ if (all && Array.isArray(rect) && rect.length) {
|
|
|
|
+ resolve(rect)
|
|
|
|
+ }
|
|
|
|
+ if (!all && rect) {
|
|
|
|
+ resolve(rect)
|
|
|
|
+ }
|
|
|
|
+ })
|
|
|
|
+ .exec()
|
|
|
|
+ })
|
|
|
|
+ },
|
|
|
|
+ }
|
|
|
|
+ };
|
|
|
|
+</script>
|
|
|
|
+
|
|
|
|
+<style lang="scss" scoped>
|
|
|
|
+ .cj-slider {
|
|
|
|
+ position: relative;
|
|
|
|
+ // background-color: #ebedf0;
|
|
|
|
+
|
|
|
|
+ &__line {
|
|
|
|
+ position: absolute;
|
|
|
|
+ width: 100%;
|
|
|
|
+ background-color: #ebedf0;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ &__gap {
|
|
|
|
+ position: relative;
|
|
|
|
+ // 动画有bug,暂时取消
|
|
|
|
+ // 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;
|
|
|
|
+ cursor: pointer;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ &__button-wrap {
|
|
|
|
+ position: absolute;
|
|
|
|
+ top: 50%;
|
|
|
|
+ left: 0;
|
|
|
|
+ transform: translate3d(-50%, -50%, 0);
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ &__button-wrap2 {
|
|
|
|
+ position: absolute;
|
|
|
|
+ top: 50%;
|
|
|
|
+ right: 0;
|
|
|
|
+ transform: translate3d(50%, -50%, 0);
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ .cj-slider--disabled {
|
|
|
|
+ opacity: 0.5;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ .mouse-move {
|
|
|
|
+ position: fixed;
|
|
|
|
+ left: 0;
|
|
|
|
+ right: 0;
|
|
|
|
+ transform: translateY(-50%);
|
|
|
|
+ opacity: 0;
|
|
|
|
+ }
|
|
|
|
+</style>
|