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416 lines
12 KiB
416 lines
12 KiB
<template> |
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<view class="u-number-box"> |
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<view |
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class="u-number-box__slot" |
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@tap.stop="clickHandler('minus')" |
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@touchstart="onTouchStart('minus')" |
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@touchend.stop="clearTimeout" |
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v-if="showMinus && $slots.minus" |
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> |
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<slot name="minus" /> |
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</view> |
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<view |
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v-else-if="showMinus" |
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class="u-number-box__minus" |
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@tap.stop="clickHandler('minus')" |
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@touchstart="onTouchStart('minus')" |
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@touchend.stop="clearTimeout" |
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hover-class="u-number-box__minus--hover" |
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hover-stay-time="150" |
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:class="{ 'u-number-box__minus--disabled': isDisabled('minus') }" |
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:style="[buttonStyle('minus')]" |
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> |
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<u-icon |
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name="minus" |
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:color="isDisabled('minus') ? '#c8c9cc' : '#323233'" |
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size="15" |
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bold |
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:customStyle="iconStyle" |
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></u-icon> |
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</view> |
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<slot name="input"> |
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<input |
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:disabled="disabledInput || disabled" |
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:cursor-spacing="getCursorSpacing" |
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:class="{ 'u-number-box__input--disabled': disabled || disabledInput }" |
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v-model="currentValue" |
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class="u-number-box__input" |
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@blur="onBlur" |
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@focus="onFocus" |
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@input="onInput" |
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type="number" |
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:style="[inputStyle]" |
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/> |
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</slot> |
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<view |
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class="u-number-box__slot" |
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@tap.stop="clickHandler('plus')" |
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@touchstart="onTouchStart('plus')" |
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@touchend.stop="clearTimeout" |
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v-if="showPlus && $slots.plus" |
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> |
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<slot name="plus" /> |
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</view> |
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<view |
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v-else-if="showPlus" |
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class="u-number-box__plus" |
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@tap.stop="clickHandler('plus')" |
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@touchstart="onTouchStart('plus')" |
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@touchend.stop="clearTimeout" |
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hover-class="u-number-box__plus--hover" |
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hover-stay-time="150" |
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:class="{ 'u-number-box__minus--disabled': isDisabled('plus') }" |
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:style="[buttonStyle('plus')]" |
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> |
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<u-icon |
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name="plus" |
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:color="isDisabled('plus') ? '#c8c9cc' : '#323233'" |
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size="15" |
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bold |
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:customStyle="iconStyle" |
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></u-icon> |
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</view> |
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</view> |
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</template> |
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<script> |
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import props from './props.js'; |
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/** |
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* numberBox 步进器 |
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* @description 该组件一般用于商城购物选择物品数量的场景。 |
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* @tutorial https://uviewui.com/components/numberBox.html |
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* @property {String | Number} name 步进器标识符,在change回调返回 |
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* @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 ) |
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* @property {String | Number} min 最小值 (默认 1 ) |
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* @property {String | Number} max 最大值 (默认 Number.MAX_SAFE_INTEGER ) |
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* @property {String | Number} step 加减的步长,可为小数 (默认 1 ) |
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* @property {Boolean} integer 是否只允许输入整数 (默认 false ) |
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* @property {Boolean} disabled 是否禁用,包括输入框,加减按钮 (默认 false ) |
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* @property {Boolean} disabledInput 是否禁用输入框 (默认 false ) |
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* @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 ) |
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* @property {String | Number} inputWidth 输入框宽度,单位为px (默认 35 ) |
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* @property {Boolean} showMinus 是否显示减少按钮 (默认 true ) |
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* @property {Boolean} showPlus 是否显示增加按钮 (默认 true ) |
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* @property {String | Number} decimalLength 显示的小数位数 |
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* @property {Boolean} longPress 是否开启长按加减手势 (默认 true ) |
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* @property {String} color 输入框文字和加减按钮图标的颜色 (默认 '#323233' ) |
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* @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 ) |
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* @property {String} bgColor 输入框和按钮的背景颜色 (默认 '#EBECEE' ) |
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* @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 ) |
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* @property {Boolean} disablePlus 是否禁用增加按钮 (默认 false ) |
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* @property {Boolean} disableMinus 是否禁用减少按钮 (默认 false ) |
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* @property {Object | String} iconStyle 加减按钮图标的样式 |
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* |
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* @event {Function} onFocus 输入框活动焦点 |
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* @event {Function} onBlur 输入框失去焦点 |
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* @event {Function} onInput 输入框值发生变化 |
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* @event {Function} onChange |
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* @example <u-number-box v-model="value" @change="valChange"></u-number-box> |
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*/ |
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export default { |
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name: 'u-number-box', |
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mixins: [uni.$u.mpMixin, uni.$u.mixin, props], |
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data() { |
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return { |
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// 输入框实际操作的值 |
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currentValue: '', |
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// 定时器 |
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longPressTimer: null |
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} |
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}, |
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watch: { |
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// 多个值之间,只要一个值发生变化,都要重新检查check()函数 |
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watchChange(n) { |
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this.check() |
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}, |
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// 监听v-mode的变化,重新初始化内部的值 |
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value(n) { |
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if (n !== this.currentValue) { |
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this.currentValue = this.format(this.value) |
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} |
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} |
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}, |
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computed: { |
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getCursorSpacing() { |
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// 判断传入的单位,如果为px单位,需要转成px |
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return uni.$u.getPx(this.cursorSpacing) |
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}, |
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// 按钮的样式 |
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buttonStyle() { |
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return (type) => { |
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const style = { |
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backgroundColor: this.bgColor, |
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height: uni.$u.addUnit(this.buttonSize), |
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color: this.color |
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} |
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if (this.isDisabled(type)) { |
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style.backgroundColor = '#f7f8fa' |
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} |
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return style |
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} |
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}, |
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// 输入框的样式 |
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inputStyle() { |
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const disabled = this.disabled || this.disabledInput |
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const style = { |
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color: this.color, |
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backgroundColor: this.bgColor, |
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height: uni.$u.addUnit(this.buttonSize), |
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width: uni.$u.addUnit(this.inputWidth) |
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} |
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return style |
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}, |
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// 用于监听多个值发生变化 |
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watchChange() { |
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return [this.integer, this.decimalLength, this.min, this.max] |
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}, |
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isDisabled() { |
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return (type) => { |
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if (type === 'plus') { |
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// 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 |
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return ( |
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this.disabled || |
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this.disablePlus || |
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this.currentValue >= this.max |
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) |
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} |
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// 点击减少按钮同理 |
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return ( |
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this.disabled || |
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this.disableMinus || |
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this.currentValue <= this.min |
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) |
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} |
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}, |
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}, |
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mounted() { |
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this.init() |
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}, |
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methods: { |
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init() { |
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this.currentValue = this.format(this.value) |
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}, |
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// 格式化整理数据,限制范围 |
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format(value) { |
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value = this.filter(value) |
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// 如果为空字符串,那么设置为0,同时将值转为Number类型 |
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value = value === '' ? 0 : +value |
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// 对比最大最小值,取在min和max之间的值 |
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value = Math.max(Math.min(this.max, value), this.min) |
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// 如果设定了最大的小数位数,使用toFixed去进行格式化 |
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if (this.decimalLength !== null) { |
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value = value.toFixed(this.decimalLength) |
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} |
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return value |
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}, |
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// 过滤非法的字符 |
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filter(value) { |
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// 只允许0-9之间的数字,"."为小数点,"-"为负数时候使用 |
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value = String(value).replace(/[^0-9.-]/g, '') |
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// 如果只允许输入整数,则过滤掉小数点后的部分 |
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if (this.integer && value.indexOf('.') !== -1) { |
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value = value.split('.')[0] |
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} |
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return value; |
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}, |
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check() { |
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// 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 |
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const val = this.format(this.currentValue); |
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if (val !== this.currentValue) { |
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this.currentValue = val |
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} |
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}, |
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// 判断是否出于禁止操作状态 |
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// isDisabled(type) { |
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// if (type === 'plus') { |
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// // 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 |
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// return ( |
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// this.disabled || |
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// this.disablePlus || |
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// this.currentValue >= this.max |
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// ) |
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// } |
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// // 点击减少按钮同理 |
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// return ( |
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// this.disabled || |
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// this.disableMinus || |
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// this.currentValue <= this.min |
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// ) |
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// }, |
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// 输入框活动焦点 |
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onFocus(event) { |
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this.$emit('focus', { |
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...event.detail, |
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name: this.name, |
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}) |
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}, |
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// 输入框失去焦点 |
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onBlur(event) { |
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// 对输入值进行格式化 |
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const value = this.format(event.detail.value) |
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// 发出blur事件 |
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this.$emit( |
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'blur',{ |
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...event.detail, |
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name: this.name, |
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} |
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) |
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}, |
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// 输入框值发生变化 |
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onInput(e) { |
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const { |
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value = '' |
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} = e.detail || {} |
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// 为空返回 |
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if (value === '') return |
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let formatted = this.filter(value) |
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// 最大允许的小数长度 |
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if (this.decimalLength !== null && formatted.indexOf('.') !== -1) { |
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const pair = formatted.split('.'); |
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formatted = `${pair[0]}.${pair[1].slice(0, this.decimalLength)}` |
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} |
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formatted = this.format(formatted) |
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this.emitChange(formatted); |
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}, |
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// 发出change事件 |
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emitChange(value) { |
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// 如果开启了异步变更值,则不修改内部的值,需要用户手动在外部通过v-model变更 |
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if (!this.asyncChange) { |
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this.$nextTick(() => { |
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this.$emit('input', value) |
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this.currentValue = value |
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this.$forceUpdate() |
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}) |
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} |
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this.$emit('change', { |
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value, |
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name: this.name, |
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}); |
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}, |
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onChange() { |
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const { |
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type |
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} = this |
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if (this.isDisabled(type)) { |
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return this.$emit('overlimit', type) |
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} |
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const diff = type === 'minus' ? -this.step : +this.step |
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const value = this.format(this.add(+this.currentValue, diff)) |
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this.emitChange(value) |
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this.$emit(type) |
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}, |
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// 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 |
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add(num1, num2) { |
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const cardinal = Math.pow(10, 10); |
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return Math.round((num1 + num2) * cardinal) / cardinal |
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}, |
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// 点击加减按钮 |
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clickHandler(type) { |
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this.type = type |
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this.onChange() |
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}, |
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longPressStep() { |
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// 每隔一段时间,重新调用longPressStep方法,实现长按加减 |
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this.clearTimeout() |
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this.longPressTimer = setTimeout(() => { |
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this.onChange() |
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this.longPressStep() |
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}, 250); |
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}, |
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onTouchStart(type) { |
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if (!this.longPress) return |
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this.clearTimeout() |
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this.type = type |
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// 一定时间后,默认达到长按状态 |
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this.longPressTimer = setTimeout(() => { |
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this.onChange() |
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this.longPressStep() |
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}, 600) |
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}, |
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// 触摸结束,清除定时器,停止长按加减 |
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onTouchEnd() { |
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if (!this.longPress) return |
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this.clearTimeout() |
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}, |
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// 清除定时器 |
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clearTimeout() { |
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clearTimeout(this.longPressTimer) |
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this.longPressTimer = null |
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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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@import '../../libs/css/components.scss'; |
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$u-numberBox-hover-bgColor: #E6E6E6 !default; |
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$u-numberBox-disabled-color: #c8c9cc !default; |
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$u-numberBox-disabled-bgColor: #f7f8fa !default; |
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$u-numberBox-plus-radius: 4px !default; |
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$u-numberBox-minus-radius: 4px !default; |
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$u-numberBox-input-text-align: center !default; |
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$u-numberBox-input-font-size: 15px !default; |
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$u-numberBox-input-padding: 0 !default; |
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$u-numberBox-input-margin: 0 2px !default; |
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$u-numberBox-input-disabled-color: #c8c9cc !default; |
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$u-numberBox-input-disabled-bgColor: #f2f3f5 !default; |
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.u-number-box { |
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@include flex(row); |
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align-items: center; |
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&__slot { |
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/* #ifndef APP-NVUE */ |
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touch-action: none; |
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/* #endif */ |
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} |
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&__plus, |
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&__minus { |
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width: 35px; |
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@include flex; |
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justify-content: center; |
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align-items: center; |
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/* #ifndef APP-NVUE */ |
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touch-action: none; |
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/* #endif */ |
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&--hover { |
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background-color: $u-numberBox-hover-bgColor !important; |
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} |
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&--disabled { |
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color: $u-numberBox-disabled-color; |
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background-color: $u-numberBox-disabled-bgColor; |
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} |
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} |
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&__plus { |
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border-top-right-radius: $u-numberBox-plus-radius; |
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border-bottom-right-radius: $u-numberBox-plus-radius; |
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} |
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&__minus { |
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border-top-left-radius: $u-numberBox-minus-radius; |
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border-bottom-left-radius: $u-numberBox-minus-radius; |
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} |
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&__input { |
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position: relative; |
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text-align: $u-numberBox-input-text-align; |
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font-size: $u-numberBox-input-font-size; |
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padding: $u-numberBox-input-padding; |
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margin: $u-numberBox-input-margin; |
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@include flex; |
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align-items: center; |
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justify-content: center; |
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&--disabled { |
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color: $u-numberBox-input-disabled-color; |
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background-color: $u-numberBox-input-disabled-bgColor; |
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} |
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} |
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} |
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</style>
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