gree_leran/node_modules/uview-plus/components/u-number-box/u-number-box.vue

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2024-06-14 01:11:29 +00:00
<template>
<view class="u-number-box">
<view
class="u-number-box__slot cursor-pointer"
@tap.stop="clickHandler('minus')"
@touchstart="onTouchStart('minus')"
@touchend.stop="clearTimeout"
v-if="showMinus && $slots.minus"
>
<slot name="minus" />
</view>
<view
v-else-if="showMinus"
class="u-number-box__minus cursor-pointer"
@tap.stop="clickHandler('minus')"
@touchstart="onTouchStart('minus')"
@touchend.stop="clearTimeout"
hover-class="u-number-box__minus--hover"
hover-stay-time="150"
:class="{ 'u-number-box__minus--disabled': isDisabled('minus') }"
:style="[buttonStyle('minus')]"
>
<u-icon
name="minus"
:color="isDisabled('minus') ? '#c8c9cc' : '#323233'"
size="15"
bold
:customStyle="iconStyle"
></u-icon>
</view>
<slot name="input">
<!-- #ifdef MP-WEIXIN -->
<input
:disabled="disabledInput || disabled"
:cursor-spacing="getCursorSpacing"
:class="{ 'u-number-box__input--disabled': disabled || disabledInput }"
:value="currentValue"
class="u-number-box__input"
@blur="onBlur"
@focus="onFocus"
@input="onInput"
type="number"
:style="[inputStyle]"
/>
<!-- #endif -->
<!-- #ifndef MP-WEIXIN -->
<input
:disabled="disabledInput || disabled"
:cursor-spacing="getCursorSpacing"
:class="{ 'u-number-box__input--disabled': disabled || disabledInput }"
v-model="currentValue"
class="u-number-box__input"
@blur="onBlur"
@focus="onFocus"
@input="onInput"
type="number"
:style="[inputStyle]"
/>
<!-- #endif -->
</slot>
<view
class="u-number-box__slot cursor-pointer"
@tap.stop="clickHandler('plus')"
@touchstart="onTouchStart('plus')"
@touchend.stop="clearTimeout"
v-if="showPlus && $slots.plus"
>
<slot name="plus" />
</view>
<view
v-else-if="showPlus"
class="u-number-box__plus cursor-pointer"
@tap.stop="clickHandler('plus')"
@touchstart="onTouchStart('plus')"
@touchend.stop="clearTimeout"
hover-class="u-number-box__plus--hover"
hover-stay-time="150"
:class="{ 'u-number-box__minus--disabled': isDisabled('plus') }"
:style="[buttonStyle('plus')]"
>
<u-icon
name="plus"
:color="isDisabled('plus') ? '#c8c9cc' : '#323233'"
size="15"
bold
:customStyle="iconStyle"
></u-icon>
</view>
</view>
</template>
<script>
import props from './props';
import mpMixin from '../../libs/mixin/mpMixin';
import mixin from '../../libs/mixin/mixin';
import { getPx, addUnit } from '../../libs/function/index';
/**
* numberBox 步进器
* @description 该组件一般用于商城购物选择物品数量的场景
* @tutorial https://uview-plus.jiangruyi.com/components/numberBox.html
* @property {String | Number} name 步进器标识符在change回调返回
* @property {String | Number} value 用于双向绑定的值初始化时设置设为默认min值(最小值) 默认 0
* @property {String | Number} min 最小值 默认 1
* @property {String | Number} max 最大值 默认 Number.MAX_SAFE_INTEGER
* @property {String | Number} step 加减的步长可为小数 默认 1
* @property {Boolean} integer 是否只允许输入整数 默认 false
* @property {Boolean} disabled 是否禁用包括输入框加减按钮 默认 false
* @property {Boolean} disabledInput 是否禁用输入框 默认 false
* @property {Boolean} asyncChange 是否开启异步变更开启后需要手动控制输入值 默认 false
* @property {String | Number} inputWidth 输入框宽度单位为px 默认 35
* @property {Boolean} showMinus 是否显示减少按钮 默认 true
* @property {Boolean} showPlus 是否显示增加按钮 默认 true
* @property {String | Number} decimalLength 显示的小数位数
* @property {Boolean} longPress 是否开启长按加减手势 默认 true
* @property {String} color 输入框文字和加减按钮图标的颜色 默认 '#323233'
* @property {String | Number} buttonSize 按钮大小宽高等于此值单位px输入框高度和此值保持一致 默认 30
* @property {String} bgColor 输入框和按钮的背景颜色 默认 '#EBECEE'
* @property {String | Number} cursorSpacing 指定光标于键盘的距离避免键盘遮挡输入框单位px 默认 100
* @property {Boolean} disablePlus 是否禁用增加按钮 默认 false
* @property {Boolean} disableMinus 是否禁用减少按钮 默认 false
* @property {Object String} iconStyle 加减按钮图标的样式
*
* @event {Function} onFocus 输入框活动焦点
* @event {Function} onBlur 输入框失去焦点
* @event {Function} onInput 输入框值发生变化
* @event {Function} onChange
* @example <u-number-box v-model="value" @change="valChange"></u-number-box>
*/
export default {
name: 'u-number-box',
mixins: [mpMixin, mixin, props],
data() {
return {
// 输入框实际操作的值
currentValue: '',
// 定时器
longPressTimer: null
}
},
watch: {
// 多个值之间只要一个值发生变化都要重新检查check()函数
watchChange(n) {
this.check()
},
// #ifdef VUE2
// 监听v-mode的变化重新初始化内部的值
value(n) {
if (n !== this.currentValue) {
this.currentValue = this.format(this.value)
}
},
// #endif
// #ifdef VUE3
// 监听v-mode的变化重新初始化内部的值
modelValue: {
handler: function (newV, oldV) {
if (newV !== this.currentValue) {
this.currentValue = this.format(this.modelValue)
}
},
immediate: true
}
// #endif
},
computed: {
getCursorSpacing() {
// 判断传入的单位如果为px单位需要转成px
return getPx(this.cursorSpacing)
},
// 按钮的样式
buttonStyle() {
return (type) => {
const style = {
backgroundColor: this.bgColor,
height: addUnit(this.buttonSize),
color: this.color
}
if (this.isDisabled(type)) {
style.backgroundColor = '#f7f8fa'
}
return style
}
},
// 输入框的样式
inputStyle() {
const disabled = this.disabled || this.disabledInput
const style = {
color: this.color,
backgroundColor: this.bgColor,
height: addUnit(this.buttonSize),
width: addUnit(this.inputWidth)
}
return style
},
// 用于监听多个值发生变化
watchChange() {
return [this.integer, this.decimalLength, this.min, this.max]
},
isDisabled() {
return (type) => {
if (type === 'plus') {
// 在点击增加按钮情况下判断整体的disabled是否单独禁用增加按钮以及当前值是否大于最大的允许值
return (
this.disabled ||
this.disablePlus ||
this.currentValue >= this.max
)
}
// 点击减少按钮同理
return (
this.disabled ||
this.disableMinus ||
this.currentValue <= this.min
)
}
},
},
mounted() {
this.init()
},
// #ifdef VUE3
emits: ['update:modelValue', 'focus', 'blur', 'overlimit', 'change', 'plus', 'minus'],
// #endif
methods: {
init() {
// #ifdef VUE3
this.currentValue = this.format(this.modelValue)
// #endif
// #ifdef VUE2
this.currentValue = this.format(this.value)
// #endif
},
// 格式化整理数据,限制范围
format(value) {
value = this.filter(value)
// 如果为空字符串那么设置为0同时将值转为Number类型
value = value === '' ? 0 : +value
// 对比最大最小值取在min和max之间的值
value = Math.max(Math.min(this.max, value), this.min)
// 如果设定了最大的小数位数使用toFixed去进行格式化
if (this.decimalLength !== null) {
value = value.toFixed(this.decimalLength)
}
return value
},
// 过滤非法的字符
filter(value) {
// 只允许0-9之间的数字"."为小数点,"-"为负数时候使用
value = String(value).replace(/[^0-9.-]/g, '')
// 如果只允许输入整数,则过滤掉小数点后的部分
if (this.integer && value.indexOf('.') !== -1) {
value = value.split('.')[0]
}
return value;
},
check() {
// 格式化了之后,如果前后的值不相等,那么设置为格式化后的值
const val = this.format(this.currentValue);
if (val !== this.currentValue) {
this.currentValue = val
}
},
// 判断是否出于禁止操作状态
// isDisabled(type) {
// if (type === 'plus') {
// // 在点击增加按钮情况下判断整体的disabled是否单独禁用增加按钮以及当前值是否大于最大的允许值
// return (
// this.disabled ||
// this.disablePlus ||
// this.currentValue >= this.max
// )
// }
// // 点击减少按钮同理
// return (
// this.disabled ||
// this.disableMinus ||
// this.currentValue <= this.min
// )
// },
// 输入框活动焦点
onFocus(event) {
this.$emit('focus', {
...event.detail,
name: this.name,
})
},
// 输入框失去焦点
onBlur(event) {
// 对输入值进行格式化
const value = this.format(event.detail.value)
// 发出blur事件
this.$emit(
'blur',{
...event.detail,
name: this.name,
}
)
},
// 输入框值发生变化
onInput(e) {
const {
value = ''
} = e.detail || {}
// 为空返回
if (value === '') return
let formatted = this.filter(value)
// 最大允许的小数长度
if (this.decimalLength !== null && formatted.indexOf('.') !== -1) {
const pair = formatted.split('.');
formatted = `${pair[0]}.${pair[1].slice(0, this.decimalLength)}`
}
formatted = this.format(formatted)
this.emitChange(formatted);
// #ifdef MP-WEIXIN
return formatted
// #endif
},
// 发出change事件
emitChange(value) {
// 如果开启了异步变更值则不修改内部的值需要用户手动在外部通过v-model变更
if (!this.asyncChange) {
this.$nextTick(() => {
// #ifdef VUE3
this.$emit('update:modelValue', value)
// #endif
// #ifdef VUE2
this.$emit('input', value)
// #endif
this.currentValue = value
this.$forceUpdate()
})
}
this.$emit('change', {
value,
name: this.name,
});
},
onChange() {
const {
type
} = this
if (this.isDisabled(type)) {
return this.$emit('overlimit', type)
}
const diff = type === 'minus' ? -this.step : +this.step
const value = this.format(this.add(+this.currentValue, diff))
this.emitChange(value)
this.$emit(type)
},
// 对值扩大后进行四舍五入,再除以扩大因子,避免出现浮点数操作的精度问题
add(num1, num2) {
const cardinal = Math.pow(10, 10);
return Math.round((num1 + num2) * cardinal) / cardinal
},
// 点击加减按钮
clickHandler(type) {
this.type = type
this.onChange()
},
longPressStep() {
// 每隔一段时间重新调用longPressStep方法实现长按加减
this.clearTimeout()
this.longPressTimer = setTimeout(() => {
this.onChange()
this.longPressStep()
}, 250);
},
onTouchStart(type) {
if (!this.longPress) return
this.clearTimeout()
this.type = type
// 一定时间后,默认达到长按状态
this.longPressTimer = setTimeout(() => {
this.onChange()
this.longPressStep()
}, 600)
},
// 触摸结束,清除定时器,停止长按加减
onTouchEnd() {
if (!this.longPress) return
this.clearTimeout()
},
// 清除定时器
clearTimeout() {
clearTimeout(this.longPressTimer)
this.longPressTimer = null
}
}
}
</script>
<style lang="scss" scoped>
@import '../../libs/css/components.scss';
$u-numberBox-hover-bgColor: #E6E6E6 !default;
$u-numberBox-disabled-color: #c8c9cc !default;
$u-numberBox-disabled-bgColor: #f7f8fa !default;
$u-numberBox-plus-radius: 4px !default;
$u-numberBox-minus-radius: 4px !default;
$u-numberBox-input-text-align: center !default;
$u-numberBox-input-font-size: 15px !default;
$u-numberBox-input-padding: 0 !default;
$u-numberBox-input-margin: 0 2px !default;
$u-numberBox-input-disabled-color: #c8c9cc !default;
$u-numberBox-input-disabled-bgColor: #f2f3f5 !default;
.u-number-box {
@include flex(row);
align-items: center;
&__slot {
/* #ifndef APP-NVUE */
touch-action: none;
/* #endif */
}
&__plus,
&__minus {
width: 35px;
@include flex;
justify-content: center;
align-items: center;
/* #ifndef APP-NVUE */
touch-action: none;
/* #endif */
&--hover {
background-color: $u-numberBox-hover-bgColor !important;
}
&--disabled {
color: $u-numberBox-disabled-color;
background-color: $u-numberBox-disabled-bgColor;
}
}
&__plus {
border-top-right-radius: $u-numberBox-plus-radius;
border-bottom-right-radius: $u-numberBox-plus-radius;
}
&__minus {
border-top-left-radius: $u-numberBox-minus-radius;
border-bottom-left-radius: $u-numberBox-minus-radius;
}
&__input {
position: relative;
text-align: $u-numberBox-input-text-align;
font-size: $u-numberBox-input-font-size;
padding: $u-numberBox-input-padding;
margin: $u-numberBox-input-margin;
@include flex;
align-items: center;
justify-content: center;
&--disabled {
color: $u-numberBox-input-disabled-color;
background-color: $u-numberBox-input-disabled-bgColor;
}
}
}
</style>