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<template>
<div class="el-transfer">
<transfer-panel
v-bind="$props"
ref="leftPanel"
:data="sourceData"
:title="titles[0] || t('el.transfer.titles.0')"
:default-checked="leftDefaultChecked"
:placeholder="filterPlaceholder || t('el.transfer.filterPlaceholder')"
@checked-change="onSourceCheckedChange">
<slot name="left-footer"></slot>
</transfer-panel>
<div class="el-transfer__buttons">
<el-button
type="primary"
:class="['el-transfer__button', hasButtonTexts ? 'is-with-texts' : '']"
@click.native="addToLeft"
:disabled="rightChecked.length === 0">
<i class="el-icon-arrow-left"></i>
<span v-if="buttonTexts[0] !== undefined">{{ buttonTexts[0] }}</span>
</el-button>
<el-button
type="primary"
:class="['el-transfer__button', hasButtonTexts ? 'is-with-texts' : '']"
@click.native="addToRight"
:disabled="leftChecked.length === 0">
<span v-if="buttonTexts[1] !== undefined">{{ buttonTexts[1] }}</span>
<i class="el-icon-arrow-right"></i>
</el-button>
</div>
<transfer-panel
v-bind="$props"
ref="rightPanel"
:data="targetData"
:title="titles[1] || t('el.transfer.titles.1')"
:default-checked="rightDefaultChecked"
:placeholder="filterPlaceholder || t('el.transfer.filterPlaceholder')"
@checked-change="onTargetCheckedChange">
<slot name="right-footer"></slot>
</transfer-panel>
</div>
</template>
<script>
import ElButton from 'element-ui/packages/button';
import Emitter from 'element-ui/src/mixins/emitter';
import Locale from 'element-ui/src/mixins/locale';
import TransferPanel from './transfer-panel.vue';
import Migrating from 'element-ui/src/mixins/migrating';
export default {
name: 'ElTransfer',
mixins: [Emitter, Locale, Migrating],
components: {
TransferPanel,
ElButton
},
props: {
data: {
type: Array,
default() {
return [];
}
},
titles: {
type: Array,
default() {
return [];
}
},
buttonTexts: {
type: Array,
default() {
return [];
}
},
filterPlaceholder: {
type: String,
default: ''
},
filterMethod: Function,
leftDefaultChecked: {
type: Array,
default() {
return [];
}
},
rightDefaultChecked: {
type: Array,
default() {
return [];
}
},
renderContent: Function,
value: {
type: Array,
default() {
return [];
}
},
format: {
type: Object,
default() {
return {};
}
},
filterable: Boolean,
props: {
type: Object,
default() {
return {
label: 'label',
key: 'key',
disabled: 'disabled'
};
}
},
targetOrder: {
type: String,
default: 'original'
}
},
data() {
return {
leftChecked: [],
rightChecked: []
};
},
computed: {
dataObj() {
const key = this.props.key;
return this.data.reduce((o, cur) => (o[cur[key]] = cur) && o, {});
},
sourceData() {
return this.data.filter(item => this.value.indexOf(item[this.props.key]) === -1);
},
targetData() {
return this.targetOrder === 'original'
? this.data.filter(item => this.value.indexOf(item[this.props.key]) > -1)
: this.value.map(key => this.dataObj[key]);
},
hasButtonTexts() {
return this.buttonTexts.length === 2;
}
},
watch: {
value(val) {
this.dispatch('ElFormItem', 'el.form.change', val);
}
},
methods: {
getMigratingConfig() {
return {
props: {
'footer-format': 'footer-format is renamed to format.'
}
};
},
onSourceCheckedChange(val, movedKeys) {
this.leftChecked = val;
if (movedKeys === undefined) return;
this.$emit('left-check-change', val, movedKeys);
},
onTargetCheckedChange(val, movedKeys) {
this.rightChecked = val;
if (movedKeys === undefined) return;
this.$emit('right-check-change', val, movedKeys);
},
addToLeft() {
let currentValue = this.value.slice();
this.rightChecked.forEach(item => {
const index = currentValue.indexOf(item);
if (index > -1) {
currentValue.splice(index, 1);
}
});
this.$emit('input', currentValue);
this.$emit('change', currentValue, 'left', this.rightChecked);
},
addToRight() {
let currentValue = this.value.slice();
const itemsToBeMoved = [];
const key = this.props.key;
this.data.forEach(item => {
const itemKey = item[key];
if (
this.leftChecked.indexOf(itemKey) > -1 &&
this.value.indexOf(itemKey) === -1
) {
itemsToBeMoved.push(itemKey);
}
});
currentValue = this.targetOrder === 'unshift'
? itemsToBeMoved.concat(currentValue)
: currentValue.concat(itemsToBeMoved);
this.$emit('input', currentValue);
this.$emit('change', currentValue, 'right', this.leftChecked);
},
clearQuery(which) {
if (which === 'left') {
this.$refs.leftPanel.query = '';
} else if (which === 'right') {
this.$refs.rightPanel.query = '';
}
}
}
};
</script>
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