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关于vue.js:eltreeselect

<!--
    /**
     * 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
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