frontend/src/components/common/Header.vue

<template>
  <div class="header">
    <!-- 折叠按钮 -->
    <!-- <div class="collapse-btn" @click="collapseChage">
            <i v-if="!collapse" class="el-icon-s-fold"></i>
            <i v-else class="el-icon-s-unfold"></i>
        </div> -->
    <div class="logo">可视化智能管控系统</div>
    <v-sidebar></v-sidebar>
    <div class="header-right">
      <div class="header-user-con">
        <el-select v-model="theme" value-key="value" @change="changeTheme">
          <el-option
            v-for="item in options"
            :key="item.value"
            :label="item.label"
            :value="item.value"
          ></el-option>
          <!-- <el-option label="红色" value="红色"></el-option>
                    <el-option label="绿色" value="绿色"></el-option>
                    <el-option label="橙色" value="橙色"></el-option> -->
        </el-select>
        <!-- 全屏显示 -->

        <div class="btn-fullscreen" @click="handleFullScreen">
          <el-tooltip
            effect="dark"
            :content="fullscreen ? `取消全屏` : `全屏`"
            placement="bottom"
          >
            <i class="el-icon-rank"></i>
          </el-tooltip>
        </div>

        <!-- 用户头像 -->
        <div class="user-avator">
          <img src="../../assets/img/user.jpeg" />
        </div>
        <!-- 用户名下拉菜单 -->
        <el-dropdown class="user-name" trigger="click" @command="handleCommand">
          <span class="el-dropdown-link">
            {{ username }}
            <i class="el-icon-caret-bottom"></i>
          </span>
          <el-dropdown-menu slot="dropdown">
            <el-dropdown-item divided command="loginout"
              >退出登录</el-dropdown-item
            >
          </el-dropdown-menu>
        </el-dropdown>
      </div>
    </div>
  </div>
</template>
<script>
// import bus from '../common/bus';
import updateElementUiTheme from "update-element-ui-theme";
import vSidebar from "./Sidebar.vue";
export default {
  components: {
    vSidebar,
  },
  data() {
    return {
      options: [
        {
          value: "#20a0ff",
          label: "蓝色",
        },
        {
          value: "#EE320C",
          label: "红色",
        },
        {
          value: "#25EE28",
          label: "绿色",
        },
        {
          value: "#f08200",
          label: "橙色",
        },
      ],
      theme: {},

      //collapse: false,
      fullscreen: false,
      name: "xinyin",
    };
  },
  computed: {
    username() {
      let username = localStorage.getItem("ms_username");
      return username ? username : this.name;
    },
  },
  methods: {
    //修改主题色
    changeTheme(e) {
      console.log(e);
      //   const app = document.getElementById("app");
      //   if (this.theme === "蓝色") {
      //     this.color = "#20a0ff";
      //     app.classList.remove("redStyle", "greenStyle", "orangeStyle");
      //     app.classList.add("blueStyle");
      //   } else if (this.theme === "红色") {
      //     this.color = "#EE320C";
      //     app.classList.remove("blueStyle", "greenStyle", "orangeStyle");
      //     app.classList.add("redStyle");
      //   } else if (this.theme === "绿色") {
      //     this.color = "#25EE28";
      //     app.classList.add("greenStyle");
      //   } else if (this.theme === "橙色") {
      //     this.color = "#f08200";
      //     app.classList.remove("blueStyle", "greenStyle", "redStyle");
      //     app.classList.add("orangeStyle");
      //   }
    },
    // 用户名下拉菜单选择事件
    handleCommand(command) {
      if (command == "loginout") {
        localStorage.removeItem("ms_username");
        this.$router.push("/login");
      }
    },
    // 侧边栏折叠
    // collapseChage() {
    //     this.collapse = !this.collapse;
    //     bus.$emit('collapse', this.collapse);
    //     this.$store.commit('changeOpen', this.collapse);
    // },
    // 全屏事件
    handleFullScreen() {
      let element = document.documentElement;
      if (this.fullscreen) {
        if (document.exitFullscreen) {
          document.exitFullscreen();
        } else if (document.webkitCancelFullScreen) {
          document.webkitCancelFullScreen();
        } else if (document.mozCancelFullScreen) {
          document.mozCancelFullScreen();
        } else if (document.msExitFullscreen) {
          document.msExitFullscreen();
        }
      } else {
        if (element.requestFullscreen) {
          element.requestFullscreen();
        } else if (element.webkitRequestFullScreen) {
          element.webkitRequestFullScreen();
        } else if (element.mozRequestFullScreen) {
          element.mozRequestFullScreen();
        } else if (element.msRequestFullscreen) {
          // IE11
          element.msRequestFullscreen();
        }
      }
      this.fullscreen = !this.fullscreen;
    },
  },
  created() {
    this.theme = {
      value: "#20a0ff",
      label: "蓝色",
    };
  },
  mounted() {
    this.$watch(
      "color",
      (value) => {
        updateElementUiTheme({
          theme: value,
          themeName: "--my-theme-name",
        });
      },
      { immediate: true }
    );
  },
};
</script>
<style lang="less">
.header {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  height: 70px;
  font-size: 22px;
  color: @color-white;
  background-color: @color-primary;
  .collapse-btn {
    float: left;
    padding: 0 21px;
    cursor: pointer;
    line-height: 70px;
  }
  .logo {
    float: left;
    width: 250px;
    line-height: 70px;
    text-align: center;
  }
  .header-right {
    float: right;
    padding-right: 32px;
  }
  .header-user-con {
    display: flex;
    height: 70px;
    align-items: center;
    .el-select {
      width: 90px;
    }
  }
  .btn-fullscreen {
    transform: rotate(45deg);
    margin-right: 5px;
    font-size: 24px;
  }
  .btn-bell,
  .btn-fullscreen {
    position: relative;
    width: 30px;
    height: 30px;
    text-align: center;
    border-radius: 15px;
    cursor: pointer;
  }
  .btn-bell-badge {
    position: absolute;
    right: 0;
    top: -2px;
    width: 8px;
    height: 8px;
    border-radius: 4px;
    background: #f56c6c;
    color: @color-white;
  }
  .btn-bell .el-icon-bell {
    color: @color-white;
  }
  .user-name {
    margin-left: 10px;
  }
  .user-avator {
    margin-left: 20px;
  }
  .user-avator img {
    display: block;
    width: 40px;
    height: 40px;
    border-radius: 50%;
  }
  .el-dropdown-link {
    color: @color-white;
    cursor: pointer;
  }
  .el-dropdown-menu__item {
    text-align: center;
  }
}
</style>