tree.vue
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<template>
<ul :class="classes">
<li v-for="item in data" :class="itemCls(item)">
<span :class="arrowCls(item)" @click="setExpand(item.disabled, $index)">
<Icon type="arrow-right-b"></Icon>
</span>
<Checkbox
v-if="showCheckbox"
:checked="item.checked && item.childrenCheckedStatus == 2"
:disabled="item.disabled || item.disableCheckbox"
:indeterminate="item.checked && item.childrenCheckedStatus == 1"
@click.prevent="setCheck(item.disabled||item.disableCheckbox,$index)"></Checkbox>
<a :class="titleCls(item)" @click="setSelect(item.disabled, $index)">
<span :class="[prefixCls + '-title']" v-html="item.title"></span>
</a>
<tree
v-if="!item.isLeaf"
v-show="item.expand"
:class="expandCls(item)"
:data.sync="item.children"
:key="this.key+'.'+$index"
:multiple="multiple"
:show-checkbox="showCheckbox"
transition="slide-up"></tree>
</li>
</ul>
</template>
<script>
import Icon from '../icon/icon.vue';
import Checkbox from '../checkbox/checkbox.vue';
import { t } from '../../locale';
const prefixCls = 'ivu-tree';
export default {
name: 'tree',
components: { Icon, Checkbox },
props: {
data: {
type: Array,
default () {
return [];
}
},
key: {
type: String,
default: '0'
},
multiple: {
type: Boolean,
default: false
},
showCheckbox: {
type: Boolean,
default: false
},
emptyText: {
type: String,
default () {
return t('i.tree.emptyText');
}
}
},
data () {
return {
prefixCls: prefixCls
};
},
computed: {
classes () {
if (this.key === '0') {
return this.prefixCls;
} else {
return `${this.prefixCls}-child-tree`;
}
}
},
watch: {
data(){
if (this.key === '0') {
this.setKey();
this.preHandle();
}
}
},
methods: {
itemCls (item) {
return [
{
[`${prefixCls}-item-disabled`]: item.disabled
}
];
},
arrowCls (item) {
return [
`${this.prefixCls}-switcher`,
{
[`${this.prefixCls}-switcher-disabled`]: item.disabled,
[`${this.prefixCls}-noline_close`]: !item.expand && !item.isLeaf,
[`${this.prefixCls}-noline_open`]: item.expand && !item.isLeaf,
[`${this.prefixCls}-switcher-noop`]: item.isLeaf
}
];
},
titleCls (item) {
return [
{
[`${this.prefixCls}-node-selected`]: item.selected
}
];
},
expandCls (item) {
return [
{
[`${this.prefixCls}-child-tree-open`]: item.expand
}
];
},
setKey () {
for (let i = 0; i < this.data.length; i++) {
this.data[i].key = `${this.key}.${i}`;
}
},
preHandle () {
for (let [i,item] of this.data.entries()) {
if (!item.children || !item.children.length) {
this.$set(`data[${i}].isLeaf`, true);
this.$set(`data[${i}].childrenCheckedStatus`, 2);
continue;
}
if (item.checked && !item.childrenCheckedStatus) {
this.$set(`data[${i}].childrenCheckedStatus`, 2);
this.$broadcast('parentChecked', true, `${this.key}.${i}`);
} else {
let status = this.getChildrenCheckedStatus(item.children);
this.$set(`data[${i}].childrenCheckedStatus`, status);
if (status !== 0) this.$set(`data[${i}].checked`, true);
}
}
},
setExpand (disabled, index) {
if (!disabled) {
this.$set(`data[${index}].expand`, !this.data[index].expand);
}
},
setSelect (disabled, index) {
if (!disabled) {
const selected = !this.data[index].selected;
if (this.multiple || !selected) {
this.$set(`data[${index}].selected`, selected);
} else {
for (let i = 0; i < this.data.length; i++) {
if (i == index) {
this.$set(`data[${i}].selected`, true);
} else {
this.$set(`data[${i}].selected`, false);
}
}
}
this.$dispatch('nodeSelected', this, selected);
}
},
setCheck (disabled, index) {
if (disabled) return;
const checked = !this.data[index].checked;
this.$set(`data[${index}].checked`, checked);
this.$set(`data[${index}].childrenCheckedStatus`, checked ? 2 : 0);
this.$dispatch('childChecked', this, this.key);
this.$broadcast('parentChecked', checked, `${this.key}.${index}`);
},
getNodes (data, opt) {
data = data || this.data;
let res = [];
for (let node of data) {
let tmp = true;
for (let [key, value] of Object.entries(opt)) {
if (node[key] != value) {
tmp = false;
break;
}
}
if (tmp) {
res.push(node);
}
if (node.children && node.children.length) {
res = res.concat(this.getNodes(node.children, opt));
}
}
return res;
},
getSelectedNodes () {
return this.getNodes(this.data, {selected: true});
},
getCheckedNodes () {
return this.getNodes(this.data, {checked: true, childrenCheckedStatus: 2});
},
getChildrenCheckedStatus (children) {
let checkNum = 0, child_childrenAllChecked = true;
for (let child of children) {
if (child.checked) {
checkNum++;
}
if (child.childrenCheckedStatus !== 2) {
child_childrenAllChecked = false;
}
}
// select all
if (checkNum == children.length) {
return child_childrenAllChecked ? 2 : 1;
// select some
} else if (checkNum > 0) {
return 1;
} else {
return 0;
}
}
},
ready(){
this.setKey();
this.preHandle();
this.$on('nodeSelected', (ori, selected) => {
if (this.key !== '0') return true;
if (!this.multiple && selected) {
if (this !== ori) {
for (let i = 0; i < this.data.length; i++) {
this.$set(`data[${i}].selected`, false);
}
}
this.$broadcast('cancelSelected', ori);
}
this.$nextTick(() => {
this.$emit('on-select-change', this.getSelectedNodes());
});
});
this.$on('cancelSelected', ori => {
this.$broadcast('cancelSelected', ori);
if (this !== ori) {
for (let i = 0; i < this.data.length; i++) {
this.$set(`data[${i}].selected`, false);
}
}
});
this.$on('parentChecked', (status, key) => {
if (this.key == key || this.key.startsWith(key + '.')) {
for (let i = 0; i < this.data.length; i++) {
this.$set(`data[${i}].checked`, status);
this.$set(`data[${i}].childrenCheckedStatus`, status ? 2 : 0);
}
this.$broadcast('parentChecked', status, key);
}
});
this.$on('childChecked', (ori, key) => {
if (this.key === '0') {
this.$nextTick(() => {
this.$emit('on-check-change', this.getCheckedNodes());
});
}
if (this === ori) return;
for (let [i,item] of this.data.entries()) {
if (this.key + '.' + i == key) {
let temp = this.getChildrenCheckedStatus(item.children);
if (temp != item.childrenCheckedStatus) {
this.$set(`data[${i}].checked`, !!temp);
this.$set(`data[${i}].childrenCheckedStatus`, temp);
if (this.key !== '0') this.$dispatch('childChecked', this, this.key);
}
}
}
});
}
};
</script>