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<template>
<view class="uni-combox">
<view v-if="label" class="uni-combox__label" :style="labelStyle">
<text>{{label}}</text>
</view>
<view class="uni-combox__input-box">
<input class="uni-combox__input" type="text" :placeholder="placeholder" v-model="inputVal" @input="onInput" @focus="onFocus" @blur="onBlur" />
<uni-icons class="uni-combox__input-arrow" type="arrowdown" size="14" @click="toggleSelector"></uni-icons>
<view class="uni-combox__selector" v-if="showSelector">
<scroll-view scroll-y="true" class="uni-combox__selector-scroll">
<view class="uni-combox__selector-empty" v-if="filterCandidatesLength === 0">
<text>{{emptyTips}}</text>
</view>
<view class="uni-combox__selector-item" v-for="(item,index) in filterCandidates" :key="index" @click="onSelectorClick(index)">
<text>{{item}}</text>
</view>
</scroll-view>
</view>
</view>
</view>
</template>
<script>
/**
* Combox 组合输入框
* @description 组合输入框一般用于既可以输入也可以选择的场景
* @tutorial https://ext.dcloud.net.cn/plugin?id=1261
* @property {String} label 左侧文字
* @property {String} labelWidth 左侧内容宽度
* @property {String} placeholder 输入框占位符
* @property {Array} candidates 候选项列表
* @property {String} emptyTips 筛选结果为空时显示的文字
* @property {String} value 组合框的值
*/
export default {
name: 'uniCombox',
props: {
label: {
type: String,
default: ''
},
labelWidth: {
type: String,
default: 'auto'
},
placeholder: {
type: String,
default: ''
},
candidates: {
type: Array,
default () {
return []
}
},
emptyTips: {
type: String,
default: '无匹配项'
},
value: {
type: [String, Number],
default: ''
}
},
data() {
return {
showSelector: false,
inputVal: ''
}
},
computed: {
labelStyle() {
if (this.labelWidth === 'auto') {
return {}
}
return {
width: this.labelWidth
}
},
filterCandidates() {
return this.candidates.filter((item) => {
return item.toString().indexOf(this.inputVal) > -1
})
},
filterCandidatesLength() {
return this.filterCandidates.length
}
},
watch: {
value: {
handler(newVal) {
this.inputVal = newVal
},
immediate: true
}
},
methods: {
toggleSelector() {
this.showSelector = !this.showSelector
},
onFocus() {
this.showSelector = true
},
onBlur() {
setTimeout(() => {
this.showSelector = false
}, 153)
},
onSelectorClick(index) {
this.inputVal = this.filterCandidates[index]
this.showSelector = false
this.$emit('input', this.inputVal)
},
onInput() {
setTimeout(() => {
this.$emit('input', this.inputVal)
})
}
}
}
</script>
<style scoped>
.uni-combox {
/* #ifndef APP-NVUE */
display: flex;
/* #endif */
height: 40px;
flex-direction: row;
align-items: center;
}
.uni-combox__label {
font-size: 16px;
line-height: 22px;
padding-right: 10px;
color: #999999;
}
.uni-combox__input-box {
position: relative;
/* #ifndef APP-NVUE */
display: flex;
/* #endif */
flex: 1;
flex-direction: row;
align-items: center;
}
.uni-combox__input {
flex: 1;
font-size: 16px;
height: 22px;
line-height: 22px;
}
.uni-combox__input-arrow {
padding: 10px;
}
.uni-combox__selector {
/* #ifndef APP-NVUE */
box-sizing: border-box;
/* #endif */
position: absolute;
top: 42px;
left: 0;
width: 100%;
background-color: #FFFFFF;
border-radius: 6px;
box-shadow: #DDDDDD 4px 4px 8px, #DDDDDD -4px -4px 8px;
z-index: 2;
}
.uni-combox__selector-scroll {
/* #ifndef APP-NVUE */
max-height: 200px;
box-sizing: border-box;
/* #endif */
}
.uni-combox__selector::before {
/* #ifndef APP-NVUE */
content: "";
/* #endif */
position: absolute;
width: 0;
height: 0;
border-bottom: solid 6px #FFFFFF;
border-right: solid 6px transparent;
border-left: solid 6px transparent;
left: 50%;
top: -6px;
margin-left: -6px;
}
.uni-combox__selector-empty,
.uni-combox__selector-item {
/* #ifndef APP-NVUE */
display: flex;
cursor: pointer;
/* #endif */
line-height: 36px;
font-size: 14px;
text-align: center;
border-bottom: solid 1px #DDDDDD;
margin: 0px 10px;
}
.uni-combox__selector-empty:last-child,
.uni-combox__selector-item:last-child {
/* #ifndef APP-NVUE */
border-bottom: none;
/* #endif */
}
</style>