shop-applet/uni_modules/uview-ui/components/u-number-box/u-number-box.vue

417 lines
12 KiB
Vue
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<template>
<view class="u-number-box">
<view
class="u-number-box__slot"
@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"
@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">
<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]"
/>
</slot>
<view
class="u-number-box__slot"
@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"
@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.js';
/**
* 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://uviewui.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: [uni.$u.mpMixin, uni.$u.mixin, props],
data() {
return {
// 输入框实际操作的值
currentValue: '',
// 定时器
longPressTimer: null
}
},
watch: {
// 多个值之间只要一个值发生变化都要重新检查check()函数
watchChange(n) {
this.check()
},
// 监听v-mode的变化重新初始化内部的值
value(n) {
if (n !== this.currentValue) {
this.currentValue = this.format(this.value)
}
}
},
computed: {
getCursorSpacing() {
// 判断传入的单位如果为px单位需要转成px
return uni.$u.getPx(this.cursorSpacing)
},
// 按钮的样式
buttonStyle() {
return (type) => {
const style = {
backgroundColor: this.bgColor,
height: uni.$u.addUnit(this.buttonSize),
color: this.color
}
if (this.isDisabled(type)) {
style.backgroundColor = '#f7f8fa'
}
return style
}
},
// 输入框的样式
inputStyle() {
const disabled = this.disabled || this.disabledInput
const style = {
color: this.color,
backgroundColor: this.bgColor,
height: uni.$u.addUnit(this.buttonSize),
width: uni.$u.addUnit(this.inputWidth)
}
return style
},
// 用于监听多个值发生变化
watchChange() {
return [this.integer, this.decimalLength, this.min, this.max]
},
isDisabled() {
return (type) => {
if (type === 'plus') {
// 在点击增加按钮情况下判断整体的disabled是否单独禁用增加按钮以及当前值是否大于最大的允许值
return (
this.disabled ||
this.disablePlus ||
this.currentValue >= this.max
)
}
// 点击减少按钮同理
return (
this.disabled ||
this.disableMinus ||
this.currentValue <= this.min
)
}
},
},
mounted() {
this.init()
},
methods: {
init() {
this.currentValue = this.format(this.value)
},
// 格式化整理数据,限制范围
format(value) {
value = this.filter(value)
// 如果为空字符串那么设置为0同时将值转为Number类型
value = value === '' ? 0 : +value
// 对比最大最小值取在min和max之间的值
value = Math.max(Math.min(this.max, value), this.min)
// 如果设定了最大的小数位数使用toFixed去进行格式化
if (this.decimalLength !== null) {
value = value.toFixed(this.decimalLength)
}
return value
},
// 过滤非法的字符
filter(value) {
// 只允许0-9之间的数字"."为小数点,"-"为负数时候使用
value = String(value).replace(/[^0-9.-]/g, '')
// 如果只允许输入整数,则过滤掉小数点后的部分
if (this.integer && value.indexOf('.') !== -1) {
value = value.split('.')[0]
}
return value;
},
check() {
// 格式化了之后,如果前后的值不相等,那么设置为格式化后的值
const val = this.format(this.currentValue);
if (val !== this.currentValue) {
this.currentValue = val
}
},
// 判断是否出于禁止操作状态
// isDisabled(type) {
// if (type === 'plus') {
// // 在点击增加按钮情况下判断整体的disabled是否单独禁用增加按钮以及当前值是否大于最大的允许值
// return (
// this.disabled ||
// this.disablePlus ||
// this.currentValue >= this.max
// )
// }
// // 点击减少按钮同理
// return (
// this.disabled ||
// this.disableMinus ||
// this.currentValue <= this.min
// )
// },
// 输入框活动焦点
onFocus(event) {
this.$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]}.${pair[1].slice(0, this.decimalLength)}`
}
formatted = this.format(formatted)
this.emitChange(formatted);
},
// 发出change事件
emitChange(value) {
// 如果开启了异步变更值则不修改内部的值需要用户手动在外部通过v-model变更
if (!this.asyncChange) {
this.$nextTick(() => {
this.$emit('input', value)
this.currentValue = value
this.$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>