<template>
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<view class="uni-numbox">
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<view @click="_calcValue('minus')" class="uni-numbox__minus uni-numbox-btns" :style="{background}">
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<text class="uni-numbox--text" :class="{ 'uni-numbox--disabled': inputValue <= min || disabled }" :style="{color}">-</text>
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</view>
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<input :disabled="disabled" @focus="_onFocus" @blur="_onBlur" class="uni-numbox__value" type="number"
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v-model="inputValue" :style="{background, color}" />
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<view @click="_calcValue('plus')" class="uni-numbox__plus uni-numbox-btns" :style="{background}">
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<text class="uni-numbox--text" :class="{ 'uni-numbox--disabled': inputValue >= max || disabled }" :style="{color}">+</text>
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</view>
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</view>
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</template>
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<script>
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/**
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* NumberBox 数字输入框
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* @description 带加减按钮的数字输入框
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* @tutorial https://ext.dcloud.net.cn/plugin?id=31
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* @property {Number} value 输入框当前值
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* @property {Number} min 最小值
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* @property {Number} max 最大值
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* @property {Number} step 每次点击改变的间隔大小
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* @property {String} background 背景色
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* @property {String} color 字体颜色（前景色）
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* @property {Boolean} disabled = [true|false] 是否为禁用状态
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* @event {Function} change 输入框值改变时触发的事件，参数为输入框当前的 value
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* @event {Function} focus 输入框聚焦时触发的事件，参数为 event 对象
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* @event {Function} blur 输入框失焦时触发的事件，参数为 event 对象
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*/
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export default {
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name: "UniNumberBox",
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emits: ['change', 'input', 'update:modelValue', 'blur', 'focus'],
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props: {
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value: {
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type: [Number, String],
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default: 1
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},
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modelValue: {
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type: [Number, String],
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default: 1
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},
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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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max: {
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type: Number,
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default: 100
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},
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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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background: {
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type: String,
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default: '#f5f5f5'
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},
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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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disabled: {
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type: Boolean,
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default: false
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}
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},
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data() {
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return {
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inputValue: 0
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};
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},
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watch: {
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value(val) {
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this.inputValue = +val;
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},
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modelValue(val) {
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this.inputValue = +val;
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}
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},
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created() {
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if (this.value === 1) {
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this.inputValue = +this.modelValue;
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}
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if (this.modelValue === 1) {
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this.inputValue = +this.value;
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}
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},
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methods: {
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_calcValue(type) {
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if (this.disabled) {
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return;
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}
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const scale = this._getDecimalScale();
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let value = this.inputValue * scale;
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let step = this.step * scale;
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if (type === "minus") {
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value -= step;
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if (value < (this.min * scale)) {
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return;
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}
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if (value > (this.max * scale)) {
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value = this.max * scale
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}
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}
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if (type === "plus") {
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value += step;
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if (value > (this.max * scale)) {
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return;
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}
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if (value < (this.min * scale)) {
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value = this.min * scale
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}
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}
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this.inputValue = (value / scale).toFixed(String(scale).length - 1);
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this.$emit("change", +this.inputValue);
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// TODO vue2 兼容
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this.$emit("input", +this.inputValue);
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// TODO vue3 兼容
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this.$emit("update:modelValue", +this.inputValue);
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},
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_getDecimalScale() {
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let scale = 1;
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// 浮点型
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if (~~this.step !== this.step) {
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scale = Math.pow(10, String(this.step).split(".")[1].length);
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}
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return scale;
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},
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_onBlur(event) {
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this.$emit('blur', event)
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let value = event.detail.value;
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if (isNaN(value)) {
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this.inputValue = this.min;
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return;
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}
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value = +value;
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if (value > this.max) {
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value = this.max;
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} else if (value < this.min) {
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value = this.min;
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}
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const scale = this._getDecimalScale();
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this.inputValue = value.toFixed(String(scale).length - 1);
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this.$emit("change", +this.inputValue);
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this.$emit("input", +this.inputValue);
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this.$emit("update:modelValue", +this.inputValue);
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},
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_onFocus(event) {
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this.$emit('focus', event)
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}
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}
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};
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</script>
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<style lang="scss" >
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$box-height: 26px;
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$bg: #f5f5f5;
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$br: 2px;
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$color: #333;
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.uni-numbox {
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/* #ifndef APP-NVUE */
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display: flex;
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/* #endif */
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flex-direction: row;
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}
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.uni-numbox-btns {
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/* #ifndef APP-NVUE */
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display: flex;
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/* #endif */
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flex-direction: row;
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align-items: center;
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justify-content: center;
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padding: 0 8px;
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background-color: $bg;
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/* #ifdef H5 */
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cursor: pointer;
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/* #endif */
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}
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.uni-numbox__value {
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margin: 0 2px;
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background-color: $bg;
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width: 40px;
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height: $box-height;
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text-align: center;
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font-size: 14px;
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border-left-width: 0;
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border-right-width: 0;
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color: $color;
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}
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.uni-numbox__minus {
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border-top-left-radius: $br;
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border-bottom-left-radius: $br;
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}
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.uni-numbox__plus {
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border-top-right-radius: $br;
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border-bottom-right-radius: $br;
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}
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.uni-numbox--text {
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// fix nvue
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line-height: 20px;
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font-size: 20px;
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font-weight: 300;
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color: $color;
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}
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.uni-numbox .uni-numbox--disabled {
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color: #c0c0c0 !important;
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/* #ifdef H5 */
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cursor: not-allowed;
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/* #endif */
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}
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</style>
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