tree.vue
4.56 KB
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<template>
<div :class="prefixCls">
<Tree-node
v-for="item in data"
:key="item.nodeKey"
:data="item"
visible
:multiple="multiple"
:show-checkbox="showCheckbox">
</Tree-node>
<div :class="[prefixCls + '-empty']" v-if="!data.length">{{ localeEmptyText }}</div>
</div>
</template>
<script>
import TreeNode from './node.vue';
import { findComponentsDownward } from '../../utils/assist';
import Emitter from '../../mixins/emitter';
import Locale from '../../mixins/locale';
const prefixCls = 'ivu-tree';
let key = 1;
export default {
name: 'Tree',
mixins: [ Emitter, Locale ],
components: { TreeNode },
props: {
data: {
type: Array,
default () {
return [];
}
},
multiple: {
type: Boolean,
default: false
},
showCheckbox: {
type: Boolean,
default: false
},
emptyText: {
type: String
}
},
data () {
return {
prefixCls: prefixCls
};
},
computed: {
localeEmptyText () {
if (this.emptyText === undefined) {
return this.t('i.tree.emptyText');
} else {
return this.emptyText;
}
}
},
methods: {
getSelectedNodes () {
const nodes = findComponentsDownward(this, 'TreeNode');
return nodes.filter(node => node.data.selected).map(node => node.data);
},
getCheckedNodes () {
const nodes = findComponentsDownward(this, 'TreeNode');
return nodes.filter(node => node.data.checked).map(node => node.data);
},
updateData (isInit = true) {
// init checked status
function reverseChecked(data) {
if (!data.nodeKey) data.nodeKey = key++;
if (data.children) {
let checkedLength = 0;
data.children.forEach(node => {
if (node.children) node = reverseChecked(node);
if (node.checked) checkedLength++;
});
if (isInit) {
if (checkedLength >= data.children.length) data.checked = true;
} else {
data.checked = checkedLength >= data.children.length;
}
return data;
} else {
return data;
}
}
function forwardChecked(data) {
if (data.children) {
data.children.forEach(node => {
if (data.checked) node.checked = true;
if (node.children) node = forwardChecked(node);
});
return data;
} else {
return data;
}
}
this.data.map(node => reverseChecked(node)).map(node => forwardChecked(node));
this.broadcast('TreeNode', 'indeterminate');
}
},
mounted () {
this.updateData();
this.$on('selected', ori => {
const nodes = findComponentsDownward(this, 'TreeNode');
nodes.forEach(node => {
this.$set(node.data, 'selected', false);
});
this.$set(ori, 'selected', true);
});
this.$on('on-selected', () => {
this.$emit('on-select-change', this.getSelectedNodes());
});
this.$on('checked', () => {
this.updateData(false);
});
this.$on('on-checked', () => {
this.$emit('on-check-change', this.getCheckedNodes());
});
this.$on('toggle-expand', (payload) => {
this.$emit('on-toggle-expand', payload);
});
},
watch: {
data () {
this.$nextTick(() => {
this.updateData();
this.broadcast('TreeNode', 'indeterminate');
});
}
}
};
</script>