<template>
  <div class="top-right-btn" :style="style">
    <el-row>
      <el-tooltip
        v-if="search"
        class="item"
        effect="dark"
        :content="showSearch ? '隐藏搜索' : '显示搜索'"
        placement="top"
      >
        <el-button circle icon="el-icon-search" @click="toggleSearch()" />
      </el-tooltip>
      <el-tooltip class="item" effect="dark" content="刷新" placement="top">
        <el-button circle icon="el-icon-refresh" @click="refresh()" />
      </el-tooltip>
      <el-tooltip
        v-if="columns"
        class="item"
        effect="dark"
        content="显隐列"
        placement="top"
      >
        <el-button
          v-if="showColumnsType == 'transfer'"
          circle
          icon="el-icon-menu"
          @click="showColumn()"
        />
        <el-dropdown
          v-if="showColumnsType == 'checkbox'"
          trigger="click"
          :hide-on-click="false"
          style="padding-left: 12px"
        >
          <el-button circle icon="el-icon-menu" />
          <el-dropdown-menu slot="dropdown">
            <template v-for="item in columns">
              <el-dropdown-item :key="item.key">
                <el-checkbox
                  :checked="item.visible"
                  :label="item.label"
                  @change="checkboxChange($event, item.label)"
                />
              </el-dropdown-item>
            </template>
          </el-dropdown-menu>
        </el-dropdown>
      </el-tooltip>
    </el-row>
    <el-dialog :title="title" :visible.sync="open" append-to-body>
      <el-transfer
        v-model="value"
        :titles="['显示', '隐藏']"
        :data="columns"
        @change="dataChange"
      />
    </el-dialog>
  </div>
</template>
<script>
export default {
  name: 'RightToolbar',
  props: {
    /* 是否显示检索条件 */
    showSearch: {
      type: Boolean,
      default: true
    },
    /* 显隐列信息 */
    columns: {
      type: Array
    },
    /* 是否显示检索图标 */
    search: {
      type: Boolean,
      default: true
    },
    /* 显隐列类型（transfer穿梭框、checkbox复选框） */
    showColumnsType: {
      type: String,
      default: 'checkbox'
    },
    /* 右外边距 */
    gutter: {
      type: Number,
      default: 10
    }
  },
  data() {
    return {
      // 显隐数据
      value: [],
      // 弹出层标题
      title: '显示/隐藏',
      // 是否显示弹出层
      open: false
    };
  },
  computed: {
    style() {
      const ret = {};
      if (this.gutter) {
        ret.marginRight = `${this.gutter / 2}px`;
      }
      return ret;
    }
  },
  created() {
    if (this.showColumnsType == 'transfer') {
      // 显隐列初始默认隐藏列
      for (const item in this.columns) {
        if (this.columns[item].visible === false) {
          this.value.push(parseInt(item));
        }
      }
    }
  },
  methods: {
    // 搜索
    toggleSearch() {
      this.$emit('update:showSearch', !this.showSearch);
    },
    // 刷新
    refresh() {
      // eslint-disable-next-line
      this.$emit('queryTable');
    },
    // 右侧列表元素变化
    dataChange(data) {
      for (const item in this.columns) {
        const key = this.columns[item].key;
        this.columns[item].visible = !data.includes(key);
      }
    },
    // 打开显隐列dialog
    showColumn() {
      this.open = true;
    },
    // 勾选
    checkboxChange(event, label) {
      this.columns.filter((item) => item.label == label)[0].visible = event;
    }
  }
};
</script>
<style lang="scss" scoped>
::v-deep .el-transfer__button {
  border-radius: 50%;
  padding: 12px;
  display: block;
  margin-left: 0px;
}
::v-deep .el-transfer__button:first-child {
  margin-bottom: 10px;
}
</style>
