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element-ui 合并行单元格，列_element合并单元格算法

作者：知新_RL | 2024-06-07 19:16:05

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element合并单元格算法

结果截图

在这里插入图片描述

找出数组连续重复下标函数

findIndexs(array) {
      /* 
          @params:数组
          return：一个包含重复序列，开始索引和结束索引的数组
          如：
          [
            {start:0;end:2
            },
            {start:3;end:5}
          ]

      */
      let current = array[0];
      let result = []; //返回结果
      let startIndex = 0;
      for (let i = 1; i < array.length; i++) {
        if (array[i] != current) {
          result.push({ start: startIndex, end: i - 1 });
          current = array[i];
          startIndex = i;
        }
      }
      result.push({ start: startIndex, end: array.length - 1 });
      return result;
    },

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合并函数

arraySpanMethod({ row, column, rowIndex, columnIndex }) {
      //部门行合并
      for (let i = 0; i < this.deptGroups.length; i++) {
        if (columnIndex == 0) {
          //从第0列开始
          if (rowIndex == this.deptGroups[i].start) {
            //行数=start
            return [this.deptGroups[i].end - this.deptGroups[i].start + 1, 1]; // 将start行的高度增加到end-start+1
          }
          if (
            rowIndex <= this.deptGroups[i].end &&
            rowIndex > this.deptGroups[i].start
          ) {
            //将(start,end]的单元格都清除
            return [0, 0];
          }
        }
      }

      //项目列合并
      for (let i = 0; i < this.indexGroups.length; i++) { //外层循环是行
        for (let j = 0; j < this.indexGroups[i].length; j++) { //内层循环是每一行对应的重复元素数组，即findIndexs的返回值
          if (rowIndex == i) { //从第i行开始
            if (columnIndex == this.indexGroups[i][j].start + this.step) { //step为4，指定从第step列开始
              return [
                1,
                this.indexGroups[i][j].end - this.indexGroups[i][j].start + 1, //同行合并一样
              ];
            }
            if (
              columnIndex <= this.indexGroups[i][j].end + this.step &&
              columnIndex > this.indexGroups[i][j].start + this.step
            ) {
              return [0, 0]; //消除合并的单元格
            }
          }
        }
      }
    },
    

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data数据

data(){
    return {
      tableData: [
        {
          dept: "产品研发部",
          name: "张三",
          area: "上海",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
          ],
        },
        {
          dept: "产品研发部",
          name: "李四",
          area: "北京",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目b" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
          ],
        },
        {
          dept: "需求组",
          name: "王五",
          area: "天津",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目b" },
            { project: "项目b" },
            { project: "项目c" },
            { project: "项目c" },
            { project: "项目c" },
            { project: "项目d" },
            { project: "项目d" },
            { project: "项目d" },
            { project: "项目a" },
          ],
        },
        {
          dept: "需求组",
          name: "李华",
          area: "天津",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目b" },
            { project: "项目c" },
            { project: "项目d" },
            { project: "项目e" },
            { project: "项目f" },
            { project: "项目g" },
            { project: "项目h" },
            { project: "项目i" },
            { project: "项目j" },
            { project: "项目k" },
            { project: "项目l" },
          ],
        },
        {
          dept: "系统集成部",
          name: "李雷",
          area: "上海",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目c" },
            { project: "项目d" },
            { project: "项目e" },
            { project: "项目e" },
            { project: "项目g" },
            { project: "项目i" },
            { project: "项目i" },
            { project: "项目i" },
            { project: "项目k" },
            { project: "项目l" },
          ],
        },
      ],

      //表头
      tabHeader: [
        { prop: "dept", label: "部门", width: 180 },
        { prop: "name", label: "姓名" },
        { prop: "area", label: "所属地" },
        { prop: "identity", label: "身份" },
        { prop: "projectList[0].project", label: "2022.09" },
        { prop: "projectList[1].project", label: "2022.10" },
        { prop: "projectList[2].project", label: "2022.11" },
        { prop: "projectList[3].project", label: "2022.12" },
        { prop: "projectList[4].project", label: "2023.01" },
        { prop: "projectList[5].project", label: "2023.02" },
        { prop: "projectList[6].project", label: "2023.03" },
        { prop: "projectList[7].project", label: "2023.04" },
        { prop: "projectList[8].project", label: "2023.05" },
        { prop: "projectList[9].project", label: "2023.06" },
        { prop: "projectList[10].project", label: "2023.07" },
        { prop: "projectList[11].project", label: "2023.08" },
      ],
      indexGroups: [], // 生成的重复序列索引
      deptGroups: [], //生成的重复部门序列
      step: 4, //非月份列

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完整代码

  <div>
    <!--  :span-method="arraySpanMethod" -->
    <el-table
      :data="tableData"
      border
      :span-method="arraySpanMethod"
      style="width: 100%"
      @cell-click="cellClick"
    >
      <el-table-column
        align="center"
        v-for="(item, index) in tabHeader"
        :key="index"
        :prop="item.prop"
        :label="item.label"
        :width="item.width"
      >
      </el-table-column>
    </el-table>
  </div>
</template>

<script>
/* eslint-disable */
export default {
  name: "ManageFrontSystemRole",

  data() {
    return {
      tableData: [
        {
          dept: "产品研发部",
          name: "张三",
          area: "上海",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
          ],
        },
        {
          dept: "产品研发部",
          name: "李四",
          area: "北京",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目b" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
          ],
        },
        {
          dept: "需求组",
          name: "王五",
          area: "天津",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目b" },
            { project: "项目b" },
            { project: "项目c" },
            { project: "项目c" },
            { project: "项目c" },
            { project: "项目d" },
            { project: "项目d" },
            { project: "项目d" },
            { project: "项目a" },
          ],
        },
        {
          dept: "需求组",
          name: "李华",
          area: "天津",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目b" },
            { project: "项目c" },
            { project: "项目d" },
            { project: "项目e" },
            { project: "项目f" },
            { project: "项目g" },
            { project: "项目h" },
            { project: "项目i" },
            { project: "项目j" },
            { project: "项目k" },
            { project: "项目l" },
          ],
        },
        {
          dept: "系统集成部",
          name: "李雷",
          area: "上海",
          identity: "正式员工",
          projectList: [
            { project: "项目a" },
            { project: "项目a" },
            { project: "项目c" },
            { project: "项目d" },
            { project: "项目e" },
            { project: "项目e" },
            { project: "项目g" },
            { project: "项目i" },
            { project: "项目i" },
            { project: "项目i" },
            { project: "项目k" },
            { project: "项目l" },
          ],
        },
      ],

      //表头
      tabHeader: [
        { prop: "dept", label: "部门", width: 180 },
        { prop: "name", label: "姓名" },
        { prop: "area", label: "所属地" },
        { prop: "identity", label: "身份" },
        { prop: "projectList[0].project", label: "2022.09" },
        { prop: "projectList[1].project", label: "2022.10" },
        { prop: "projectList[2].project", label: "2022.11" },
        { prop: "projectList[3].project", label: "2022.12" },
        { prop: "projectList[4].project", label: "2023.01" },
        { prop: "projectList[5].project", label: "2023.02" },
        { prop: "projectList[6].project", label: "2023.03" },
        { prop: "projectList[7].project", label: "2023.04" },
        { prop: "projectList[8].project", label: "2023.05" },
        { prop: "projectList[9].project", label: "2023.06" },
        { prop: "projectList[10].project", label: "2023.07" },
        { prop: "projectList[11].project", label: "2023.08" },
      ],
      indexGroups: [], // 生成的重复序列索引
      deptGroups: [], //生成的重复部门序列
      step: 4, //非月份列
    };
  },
  created() {
    this.generateIndexGroups(this.tableData);
    this.deptGroups = this.findIndexs(this.tableData.map((i) => i.dept));
    // console.log(this.deptGroups);
  },
  mounted() {},

  methods: {
    //单元格合并函数
    arraySpanMethod({ row, column, rowIndex, columnIndex }) {
      //部门行合并
      for (let i = 0; i < this.deptGroups.length; i++) {
        if (columnIndex == 0) {
          //从第0列开始
          if (rowIndex == this.deptGroups[i].start) {
            //行数=start
            return [this.deptGroups[i].end - this.deptGroups[i].start + 1, 1]; // 将start行的高度增加到end-start+1
          }
          if (
            rowIndex <= this.deptGroups[i].end &&
            rowIndex > this.deptGroups[i].start
          ) {
            //将(start,end]的单元格都清除
            return [0, 0];
          }
        }
      }

      //项目列合并
      for (let i = 0; i < this.indexGroups.length; i++) {
        //外层循环是行
        for (let j = 0; j < this.indexGroups[i].length; j++) {
          //内层循环是每一行对应的重复元素数组，即findIndexs的返回值
          if (rowIndex == i) {
            //从第i行开始
            if (columnIndex == this.indexGroups[i][j].start + this.step) {
              //step为4，指定从第step列开始
              return [
                1,
                this.indexGroups[i][j].end - this.indexGroups[i][j].start + 1, //同行合并一样
              ];
            }
            if (
              columnIndex <= this.indexGroups[i][j].end + this.step &&
              columnIndex > this.indexGroups[i][j].start + this.step
            ) {
              return [0, 0]; //消除合并的单元格
            }
          }
        }
      }
    },

    //单元格点击
    cellClick(row, column, cell, event) {
      alert(cell.textContent);
    },
    //找出数组连续重复下标
    findIndexs(array) {
      /* 
          @params:数组
          return：一个包含重复序列，开始索引和结束索引的数组
          如：
          [
            {start:0;end:2
            },
            {start:3;end:5}
          ]

      */
      let current = array[0];
      let result = []; //返回结果
      let startIndex = 0;
      for (let i = 1; i < array.length; i++) {
        if (array[i] != current) {
          result.push({ start: startIndex, end: i - 1 });
          current = array[i];
          startIndex = i;
        }
      }
      result.push({ start: startIndex, end: array.length - 1 });
      return result;
    },

    //生成对应tabList结构的indexGroups
    generateIndexGroups(data) {
      let tmp = data.map((i) => i.projectList);
      let newPro = [];
      tmp.forEach((item) => {
        newPro.push(item.map((item) => item.project));
      });
      let result = newPro.map((item) => this.findIndexs(item));
      this.indexGroups = result;
    },
  },
};
</script>

<style lang="scss" scoped></style>




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