node.vue
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<template>
<collapse-transition>
<ul :class="classes">
<li>
<span :class="arrowClasses" @click="handleExpand">
<Icon v-if="showArrow" type="ios-arrow-forward"></Icon>
<Icon v-if="showLoading" type="ios-loading" class="ivu-load-loop"></Icon>
</span>
<Checkbox
v-if="showCheckbox"
:value="data.checked"
:indeterminate="data.indeterminate"
:disabled="data.disabled || data.disableCheckbox"
@click.native.prevent="handleCheck"></Checkbox>
<Render v-if="data.render" :render="data.render" :data="data" :node="node"></Render>
<Render v-else-if="isParentRender" :render="parentRender" :data="data" :node="node"></Render>
<span v-else :class="titleClasses" @click="handleSelect">{{ data.title }}</span>
<Tree-node
v-if="data.expand"
v-for="(item, i) in children"
:key="i"
:data="item"
:multiple="multiple"
:show-checkbox="showCheckbox"
:children-key="childrenKey">
</Tree-node>
</li>
</ul>
</collapse-transition>
</template>
<script>
import Checkbox from '../checkbox/checkbox.vue';
import Icon from '../icon/icon.vue';
import Render from './render';
import CollapseTransition from '../base/collapse-transition';
import Emitter from '../../mixins/emitter';
import { findComponentUpward } from '../../utils/assist';
const prefixCls = 'ivu-tree';
export default {
name: 'TreeNode',
mixins: [ Emitter ],
components: { Checkbox, Icon, CollapseTransition, Render },
props: {
data: {
type: Object,
default () {
return {};
}
},
multiple: {
type: Boolean,
default: false
},
childrenKey: {
type: String,
default: 'children'
},
showCheckbox: {
type: Boolean,
default: false
}
},
data () {
return {
prefixCls: prefixCls
};
},
computed: {
classes () {
return [
`${prefixCls}-children`
];
},
selectedCls () {
return [
{
[`${prefixCls}-node-selected`]: this.data.selected
}
];
},
arrowClasses () {
return [
`${prefixCls}-arrow`,
{
[`${prefixCls}-arrow-disabled`]: this.data.disabled,
[`${prefixCls}-arrow-open`]: this.data.expand
}
];
},
titleClasses () {
return [
`${prefixCls}-title`,
{
[`${prefixCls}-title-selected`]: this.data.selected
}
];
},
showArrow () {
return (this.data[this.childrenKey] && this.data[this.childrenKey].length) || ('loading' in this.data && !this.data.loading);
},
showLoading () {
return 'loading' in this.data && this.data.loading;
},
isParentRender () {
const Tree = findComponentUpward(this, 'Tree');
return Tree && Tree.render;
},
parentRender () {
const Tree = findComponentUpward(this, 'Tree');
if (Tree && Tree.render) {
return Tree.render;
} else {
return null;
}
},
node () {
const Tree = findComponentUpward(this, 'Tree');
if (Tree) {
// 将所有的 node（即flatState）和当前 node 都传递
return [Tree.flatState, Tree.flatState.find(item => item.nodeKey === this.data.nodeKey)];
} else {
return [];
}
},
children () {
return this.data[this.childrenKey];
}
},
methods: {
handleExpand () {
const item = this.data;
if (item.disabled) return;
// async loading
if (item[this.childrenKey].length === 0) {
const tree = findComponentUpward(this, 'Tree');
if (tree && tree.loadData) {
this.$set(this.data, 'loading', true);
tree.loadData(item, children => {
this.$set(this.data, 'loading', false);
if (children.length) {
this.$set(this.data, this.childrenKey, children);
this.$nextTick(() => this.handleExpand());
}
});
return;
}
}
if (item[this.childrenKey] && item[this.childrenKey].length) {
this.$set(this.data, 'expand', !this.data.expand);
this.dispatch('Tree', 'toggle-expand', this.data);
}
},
handleSelect () {
if (this.data.disabled) return;
this.dispatch('Tree', 'on-selected', this.data.nodeKey);
},
handleCheck () {
if (this.data.disabled) return;
const changes = {
checked: !this.data.checked && !this.data.indeterminate,
nodeKey: this.data.nodeKey
};
this.dispatch('Tree', 'on-check', changes);
}
}
};
</script>