<!--
/**
* 树形下拉抉择组件,下拉框展现树形构造,提供抉择某节点性能,不便其余模块调用
* @author ljn
* @date 2019-04-02
* 调用示例:* <tree-select :height="400" // 下拉框中树形高度
* :width="200" // 下拉框中树形宽度
* size="small" // 输入框的尺寸: medium/small/mini
* :data="data" // 树结构的数据
* :defaultProps="defaultProps" // 树结构的 props
* multiple // 多选
* clearable // 可清空抉择
* collapseTags // 多选时将选中值按文字的模式展现
* checkStrictly // 多选时,严格遵循父子不相互关联
* :nodeKey="nodeKey" // 绑定 nodeKey,默认绑定 'id'
* :checkedKeys="defaultCheckedKeys" // 传递默认选中的节点 key 组成的数组
* @popoverHide="popoverHide"> // 事件有两个参数:第一个是所有选中的节点 ID,第二个是所有选中的节点数据
* </tree-select>
*/
-->
<template>
<div>
<div class="mask" v-show="isShowSelect" @click="isShowSelect = !isShowSelect"></div>
<el-popover placement="bottom-start" :width="width" trigger="manual"
v-model="isShowSelect" @hide="popoverHide">
<el-tree class="common-tree" :style="style" ref="tree" :data="data" :props="defaultProps"
:show-checkbox="multiple"
:node-key="nodeKey"
:check-strictly="checkStrictly"
default-expand-all
:expand-on-click-node="false"
:check-on-click-node="multiple"
:highlight-current="true"
@node-click="handleNodeClick"
@check-change="handleCheckChange"
></el-tree>
<el-select :style="selectStyle" slot="reference" ref="select" :size="size"
v-model="selectedData"
:multiple="multiple"
:clearable="clearable"
:collapse-tags="collapseTags"
@click.native="isShowSelect = !isShowSelect"
@remove-tag="removeSelectedNodes"
@clear="removeSelectedNode"
@change="changeSelectedNodes"
class="tree-select">
<el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value"></el-option>
</el-select>
</el-popover>
</div>
</template>
<script>
export default {
name: 'tree-select',
props: {
// 树结构数据
data: {
type: Array,
default () {return [];
}
},
defaultProps: {
type: Object,
default () {return {};
}
},
// 配置是否可多选
multiple: {
type: Boolean,
default () {return false;}
},
// 配置是否可清空抉择
clearable: {
type: Boolean,
default () {return false;}
},
// 配置多选时是否将选中值按文字的模式展现
collapseTags: {
type: Boolean,
default () {return false;}
},
nodeKey: {
type: String,
default () {return 'id';}
},
// 显示复选框状况下,是否严格遵循父子不相互关联
checkStrictly: {
type: Boolean,
default () {return false;}
},
// 默认选中的节点 key 数组
checkedKeys: {
type: Array,
default () {return [];
}
},
size: {
type: String,
default () {return 'small';}
},
width: {
type: Number,
default () {return 250;}
},
height: {
type: Number,
default () {return 300;}
}
},
data () {
return {
isShowSelect: false, // 是否显示树状选择器
options: [],
selectedData: [], // 选中的节点
style: 'width:' + this.width + 'px;' + 'height:' + this.height + 'px;',
selectStyle: 'width:' + (this.width + 24) + 'px;',
checkedIds: [],
checkedData: []};
},
mounted () {this.initCheckedData();
},
methods: {
// 单选时点击 tree 节点,设置 select 选项
setSelectOption (node) {let tmpMap = {};
tmpMap.value = node.key;
tmpMap.label = node.label;
this.options = [];
this.options.push(tmpMap);
this.selectedData = node.key;
},
// 单选,选中传进来的节点
checkSelectedNode (checkedKeys) {var item = checkedKeys[0];
this.$refs.tree.setCurrentKey(item);
var node = this.$refs.tree.getNode(item);
this.setSelectOption(node);
},
// 多选,勾选上传进来的节点
checkSelectedNodes (checkedKeys) {this.$refs.tree.setCheckedKeys(checkedKeys);
},
// 单选,清空选中
clearSelectedNode () {
this.selectedData = '';
this.$refs.tree.setCurrentKey(null);
},
// 多选,清空所有勾选
clearSelectedNodes () {var checkedKeys = this.$refs.tree.getCheckedKeys(); // 所有被选中的节点的 key 所组成的数组数据
for (let i = 0; i < checkedKeys.length; i++) {this.$refs.tree.setChecked(checkedKeys[i], false);
}
},
initCheckedData () {if (this.multiple) {
// 多选
if (this.checkedKeys.length > 0) {this.checkSelectedNodes(this.checkedKeys);
} else {this.clearSelectedNodes();
}
} else {
// 单选
if (this.checkedKeys.length > 0) {this.checkSelectedNode(this.checkedKeys);
} else {this.clearSelectedNode();
}
}
},
popoverHide () {if (this.multiple) {this.checkedIds = this.$refs.tree.getCheckedKeys(); // 所有被选中的节点的 key 所组成的数组数据
this.checkedData = this.$refs.tree.getCheckedNodes(); // 所有被选中的节点所组成的数组数据} else {this.checkedIds = this.$refs.tree.getCurrentKey();
this.checkedData = this.$refs.tree.getCurrentNode();}
this.$emit('popoverHide', this.checkedIds, this.checkedData);
},
// 单选,节点被点击时的回调, 返回被点击的节点数据
handleNodeClick (data, node) {if (!this.multiple) {this.setSelectOption(node);
this.isShowSelect = !this.isShowSelect;
this.$emit('change', this.selectedData);
}
},
// 多选,节点勾选状态发生变化时的回调
handleCheckChange () {var checkedKeys = this.$refs.tree.getCheckedKeys(); // 所有被选中的节点的 key 所组成的数组数据
this.options = checkedKeys.map((item) => {var node = this.$refs.tree.getNode(item); // 所有被选中的节点对应的 node
let tmpMap = {};
tmpMap.value = node.key;
tmpMap.label = node.label;
return tmpMap;
});
this.selectedData = this.options.map((item) => {return item.value;});
this.$emit('change', this.selectedData);
},
// 多选, 删除任一 select 选项的回调
removeSelectedNodes (val) {this.$refs.tree.setChecked(val, false);
var node = this.$refs.tree.getNode(val);
if (!this.checkStrictly && node.childNodes.length > 0) {this.treeToList(node).map(item => {if (item.childNodes.length <= 0) {this.$refs.tree.setChecked(item, false);
}
});
this.handleCheckChange();}
this.$emit('change', this.selectedData);
},
treeToList (tree) {var queen = [];
var out = [];
queen = queen.concat(tree);
while (queen.length) {var first = queen.shift();
if (first.childNodes) {queen = queen.concat(first.childNodes);
}
out.push(first);
}
return out;
},
// 单选, 清空 select 输入框的回调
removeSelectedNode () {this.clearSelectedNode();
this.$emit('change', this.selectedData);
},
// 选中的 select 选项扭转的回调
changeSelectedNodes (selectedData) {
// 多选, 清空 select 输入框时,革除树勾选
if (this.multiple && selectedData.length <= 0) {this.clearSelectedNodes();
}
this.$emit('change', this.selectedData);
}
},
watch: {isShowSelect (val) {
// 暗藏 select 自带的下拉框
this.$refs.select.blur();},
checkedKeys (val) {if (!val) return;
this.checkedKeys = val;
this.initCheckedData();}
}
};
</script>
<style scoped>
.mask{
width: 100%;
height: 100%;
position: fixed;
top: 0;
left: 0;
opacity: 0;
/* z-index: 11; */
}
.common-tree{overflow: auto;}
/* .tree-select{z-index: 111;} */
</style>
调用
<template>
<div>
<el-button size="small" @click="initChecked" style="margin: 10px;"> 初始化 </el-button>
<tree-select :data="data"
:defaultProps="defaultProps" multiple
:nodeKey="nodeKey" :checkedKeys="defaultCheckedKeys"
@popoverHide="popoverHide"></tree-select>
</div>
</template>
<script>
import TreeSelect from '@/components/tree-select.vue';
var menus = [
{
'menuId': 1,
'menuName': '系统管理',
'childrenList': [
{
'menuId': 100,
'menuName': '用户治理',
'childrenList': [
{
'menuId': 1000,
'menuName': '用户查问'
},
{
'menuId': 1001,
'menuName': '用户新增'
},
{
'menuId': 1002,
'menuName': '用户批改'
},
{
'menuId': 1003,
'menuName': '用户删除'
}
]
},
{
'menuId': 101,
'menuName': '角色治理',
'childrenList': [
{
'menuId': 1006,
'menuName': '角色查问'
},
{
'menuId': 1007,
'menuName': '角色新增'
},
{
'menuId': 1008,
'menuName': '角色批改'
},
{
'menuId': 1011,
'menuName': '删除角色'
}
]
}
]
}
];
export default {
name: 'home',
components: {TreeSelect},
data () {
return {
data: menus,
defaultProps: {
children: 'childrenList',
label: 'menuName'
},
nodeKey: 'menuId',
defaultCheckedKeys: []};
},
created () {},
mounted () {
// 组建中减少了监听数据变动的,// 此处初始化 defaultCheckedKeys 的值,有成果
this.defaultCheckedKeys = [1001];
},
methods: {
// 扭转默认选中的节点数据
initChecked () {this.defaultCheckedKeys = [1006, 1007];
},
popoverHide (checkedIds, checkedData) {console.log(checkedIds);
console.log(checkedData);
}
}
};
</script>
<style scoped>
</style>
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版权申明:本文为 CSDN 博主「sleepwalker_1992」的原创文章,遵循 CC 4.0 BY-SA 版权协定,转载请附上原文出处链接及本申明。原文链接:https://blog.csdn.net/sleepwalker_1992/article/details/87894588