309 lines
8.8 KiB
Vue
309 lines
8.8 KiB
Vue
<template>
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<div class="number-box">
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<div
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@click.stop.prevent="btnTouchStart('minus')"
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:class="{ minus: true, disabled: disabled || inputVal <= min }"
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:style="{
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background: bgColor,
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height: inputHeight + 'px',
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color: color,
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}"
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>
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<div :style="{ fontSize: size + 'px' }">-</div>
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</div>
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<input
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:disabled="disabledInput || disabled"
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:class="{ 'number-input': true, 'input-disabled': disabled }"
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v-model="inputVal"
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@blur="onBlur"
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@focus="onFocus"
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type="text"
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:style="{
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color: color,
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fontSize: size + 'px',
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background: bgColor,
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height: inputHeight + 'px',
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width: inputWidth + 'px',
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}"
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/>
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<div
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class="plus"
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@click.stop.prevent="btnTouchStart('plus')"
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:class="{ disabled: disabled || inputVal >= max }"
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:style="{
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background: bgColor,
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height: inputHeight + 'px',
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color: color,
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}"
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>
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<div :style="{ fontSize: size + 'px' }">+</div>
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</div>
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</div>
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</template>
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<script>
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export default {
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components: {},
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props: {
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// 预显示的数字
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value: {
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type: Number,
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default: 1,
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},
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// 背景颜色
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bgColor: {
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type: String,
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default: ' #F2F3F5',
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},
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// 最小值
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min: {
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type: Number,
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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,
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default: 99999,
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},
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// 步进值，每次加或减的值
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step: {
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type: Number,
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default: 1,
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},
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// 是否禁用加减操作
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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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// input的字体大小，单位px
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size: {
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type: [Number, String],
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default: 14,
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},
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// input宽度，单位px
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inputWidth: {
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type: [Number, String],
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default: 64,
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},
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//字体颜色
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color: {
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type: String,
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default: '#333',
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},
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// input高度，单位px
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inputHeight: {
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type: [Number, String],
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default: 32,
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},
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// index索引，用于列表中使用，让用户知道是哪个numberbox发生了变化，一般使用for循环出来的index值即可
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index: {
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type: [Number, String],
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default: '',
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},
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// 是否禁用输入框，与disabled作用于输入框时，为OR的关系，即想要禁用输入框，又可以加减的话
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// 设置disabled为false，disabledInput为true即可
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disabledInput: {
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type: Boolean,
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default: false,
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},
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// 是否只能输入大于或等于0的整数(正整数)
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positiveInteger: {
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type: Boolean,
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default: true,
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},
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asyncChange: {
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type: Boolean,
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default: false,
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},
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},
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watch: {
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value(v1, v2) {
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if (!this.changeFromInner) {
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this.inputVal = v1
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this.$nextTick(function () {
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this.changeFromInner = false
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})
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}
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},
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inputVal(v1, v2) {
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if (v1 == '') return
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let value = 0
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let tmp = /^(?:-?\d+|-?\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/.test(v1)
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if (tmp && v1 >= this.min && v1 <= this.max) value = v1
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else value = v2
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if (this.positiveInteger) {
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if (v1 < 0 || String(v1).indexOf('.') !== -1) {
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value = v2
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this.$nextTick(() => {
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this.inputVal = v2
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})
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}
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}
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if (this.asyncChange) {
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return
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}
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// 发出change事件
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this.handleChange(value, 'change')
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},
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},
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data() {
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return {
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inputVal: 1, // 输入框中的值，不能直接使用props中的value，因为应该改变props的状态
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timer: null, // 用作长按的定时器
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changeFromInner: false, // 值发生变化，是来自内部还是外部
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innerChangeTimer: null, // 内部定时器
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}
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},
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created() {
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this.inputVal = Number(this.value)
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},
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computed: {},
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methods: {
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btnTouchStart(callback) {
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this[callback]()
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},
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minus() {
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this.computeVal('minus')
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},
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plus() {
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this.computeVal('plus')
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},
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calcPlus(num1, num2) {
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let baseNum, baseNum1, baseNum2
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try {
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baseNum1 = num1.toString().split('.')[1].length
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} catch (e) {
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baseNum1 = 0
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}
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try {
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baseNum2 = num2.toString().split('.')[1].length
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} catch (e) {
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baseNum2 = 0
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}
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baseNum = Math.pow(10, Math.max(baseNum1, baseNum2))
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let precision = baseNum1 >= baseNum2 ? baseNum1 : baseNum2
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return ((num1 * baseNum + num2 * baseNum) / baseNum).toFixed(
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precision
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)
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},
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calcMinus(num1, num2) {
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let baseNum, baseNum1, baseNum2
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try {
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baseNum1 = num1.toString().split('.')[1].length
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} catch (e) {
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baseNum1 = 0
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}
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try {
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baseNum2 = num2.toString().split('.')[1].length
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} catch (e) {
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baseNum2 = 0
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}
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baseNum = Math.pow(10, Math.max(baseNum1, baseNum2))
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let precision = baseNum1 >= baseNum2 ? baseNum1 : baseNum2
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return ((num1 * baseNum - num2 * baseNum) / baseNum).toFixed(
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precision
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)
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},
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computeVal(type) {
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if (this.disabled) return
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let value = 0
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// 减
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if (type === 'minus') {
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value = this.calcMinus(this.inputVal, this.step)
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} else if (type === 'plus') {
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value = this.calcPlus(this.inputVal, this.step)
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}
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// 判断是否小于最小值和大于最大值
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if (value < this.min || value > this.max) {
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return
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}
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if (this.asyncChange) {
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this.$emit('change', value)
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} else {
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this.inputVal = value
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this.handleChange(value, type)
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}
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},
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// 处理用户手动输入的情况
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onBlur(event) {
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let val = 0
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let value = event.target.value
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console.log(value)
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if (!/(^\d+$)/.test(value)) {
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val = this.min
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} else {
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val = +value
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}
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if (val > this.max) {
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val = this.max
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} else if (val < this.min) {
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val = this.min
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}
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this.$nextTick(() => {
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this.inputVal = val
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})
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this.handleChange(val, 'blur')
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},
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// 输入框获得焦点事件
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onFocus() {
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this.$emit('focus')
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},
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handleChange(value, type) {
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if (this.disabled) return
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// 清除定时器，避免造成混乱
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if (this.innerChangeTimer) {
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clearTimeout(this.innerChangeTimer)
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this.innerChangeTimer = null
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}
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this.changeFromInner = true
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this.innerChangeTimer = setTimeout(() => {
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this.changeFromInner = false
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}, 150)
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this.$emit('input', Number(value))
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this.$emit(type, {
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value: Number(value),
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index: this.index,
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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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.number-box {
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display: inline-flex;
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align-items: center;
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.number-input {
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position: relative;
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text-align: center;
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padding: 0;
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margin: 0 6px;
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align-items: center;
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justify-content: center;
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}
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.plus,
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.minus {
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width: 32px;
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display: flex;
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justify-content: center;
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align-items: center;
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cursor: pointer;
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}
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.plus {
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border-radius: 0 2px 2px 0;
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}
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.minus {
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border-radius: 2px 0 0 2px;
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}
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.disabled {
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color: #c8c9cc !important;
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background: #f7f8fa !important;
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}
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.input-disabled {
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color: #c8c9cc !important;
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background-color: #f2f3f5 !important;
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}
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}
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</style> |