select-head.vue
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<template>
<div @click="onHeaderClick">
<div class="ivu-tag ivu-tag-checked" v-for="item in selectedMultiple">
<span class="ivu-tag-text">{{ item.label }}</span>
<Icon type="ios-close-empty" @click.native.stop="removeTag(item)"></Icon>
</div>
<span
:class="singleDisplayClasses"
v-show="singleDisplayValue"
>{{ singleDisplayValue }}</span>
<input
:id="inputElementId"
type="text"
v-if="filterable"
v-model="query"
:disabled="disabled"
:class="[prefixCls + '-input']"
:placeholder="showPlaceholder ? localePlaceholder : ''"
:style="inputStyle"
autocomplete="off"
spellcheck="false"
@keydown="resetInputState"
@keydown.delete="handleInputDelete"
@focus="onInputFocus"
@blur="onInputFocus"
ref="input">
<Icon type="ios-close" :class="[prefixCls + '-arrow']" v-if="resetSelect" @click.native.stop="onClear"></Icon>
<Icon type="arrow-down-b" :class="[prefixCls + '-arrow']" v-if="!resetSelect && !remote && !disabled"></Icon>
</div>
</template>
<script>
import Icon from '../icon';
import Emitter from '../../mixins/emitter';
import Locale from '../../mixins/locale';
const prefixCls = 'ivu-select';
export default {
name: 'iSelectHead',
mixins: [ Emitter, Locale ],
components: { Icon },
props: {
disabled: {
type: Boolean,
default: false
},
filterable: {
type: Boolean,
default: false
},
multiple: {
type: Boolean,
default: false
},
remote: {
type: Boolean,
default: false
},
initialLabel: {
type: String,
},
values: {
type: Array,
default: () => []
},
clearable: {
type: [Function, Boolean],
default: false,
},
inputElementId: {
type: String
},
placeholder: {
type: String
},
queryProp: {
type: String,
default: ''
}
},
data () {
return {
prefixCls: prefixCls,
query: '',
inputLength: 20,
remoteInitialLabel: this.initialLabel,
preventRemoteCall: false,
};
},
computed: {
singleDisplayClasses(){
const {filterable, multiple, showPlaceholder} = this;
return [{
[prefixCls + '-placeholder']: showPlaceholder && !filterable,
[prefixCls + '-selected-value']: !showPlaceholder && !multiple && !filterable,
}];
},
singleDisplayValue(){
if ((this.multiple && this.values.length > 0) || this.filterable) return '';
return `${this.selectedSingle}` || this.localePlaceholder;
},
showPlaceholder () {
let status = false;
if (!this.multiple) {
const value = this.values[0];
if (typeof value === 'undefined' || String(value).trim() === ''){
status = !this.remoteInitialLabel;
}
} else {
if (!this.values.length > 0) {
status = true;
}
}
return status;
},
resetSelect(){
return !this.showPlaceholder && this.clearable;
},
inputStyle () {
let style = {};
if (this.multiple) {
if (this.showPlaceholder) {
style.width = '100%';
} else {
style.width = `${this.inputLength}px`;
}
}
return style;
},
localePlaceholder () {
if (this.placeholder === undefined) {
return this.t('i.select.placeholder');
} else {
return this.placeholder;
}
},
selectedSingle(){
const selected = this.values[0];
return selected ? selected.label : (this.remoteInitialLabel || '');
},
selectedMultiple(){
return this.multiple ? this.values : [];
}
},
methods: {
onInputFocus(e){
this.$emit(e.type === 'focus' ? 'on-input-focus' : 'on-input-blur');
},
removeTag (value) {
if (this.disabled) return false;
this.dispatch('iSelect', 'on-select-selected', value);
},
resetInputState () {
this.inputLength = this.$refs.input.value.length * 12 + 20;
},
handleInputDelete () {
if (this.multiple && this.selectedMultiple.length && this.query === '') {
this.removeTag(this.selectedMultiple[this.selectedMultiple.length - 1]);
}
},
onHeaderClick(e){
if (this.filterable && e.target === this.$el){
this.$refs.input.focus();
}
},
onClear(){
this.$emit('on-clear');
}
},
watch: {
values ([value]) {
if (!this.filterable) return;
this.preventRemoteCall = true;
if (this.multiple){
this.query = '';
this.preventRemoteCall = false; // this should be after the query change setter above
return;
}
// #982
if (typeof value === 'undefined' || value === '' || value === null) this.query = '';
else this.query = value.label;
},
query (val) {
if (this.preventRemoteCall) {
this.preventRemoteCall = false;
return;
}
this.$emit('on-query-change', val);
},
queryProp(query){
if (query !== this.query) this.query = query;
},
}
};
</script>