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<template> |
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<el-menu |
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:default-active="activeMenu" |
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mode="horizontal" |
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@select="handleSelect" |
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> |
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<template v-for="(item, index) in topMenus"> |
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<el-menu-item :index="item.path" :key="index" v-if="index < visibleNumber" |
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><svg-icon :icon-class="item.meta.icon" /> |
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{{ item.meta.title }}</el-menu-item |
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> |
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</template> |
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|
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<!-- 顶部菜单超出数量折叠 --> |
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<el-submenu index="more" v-if="topMenus.length > visibleNumber"> |
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<template slot="title">更多菜单</template> |
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<template v-for="(item, index) in topMenus"> |
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<el-menu-item |
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:index="item.path" |
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:key="index" |
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v-if="index >= visibleNumber" |
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><svg-icon :icon-class="item.meta.icon" /> |
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{{ item.meta.title }}</el-menu-item |
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> |
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</template> |
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</el-submenu> |
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</el-menu> |
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</template> |
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|
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<script> |
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import { constantRoutes } from "@/router"; |
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|
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export default { |
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data() { |
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return { |
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// 顶部栏初始数 |
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visibleNumber: 5, |
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// 是否为首次加载 |
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isFrist: false, |
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}; |
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}, |
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computed: { |
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// 顶部显示菜单 |
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topMenus() { |
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return this.routers.map((menu) => ({ |
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...menu, |
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children: undefined, |
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})); |
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}, |
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// 所有的路由信息 |
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routers() { |
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return this.$store.state.permission.topbarRouters; |
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}, |
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// 设置子路由 |
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childrenMenus() { |
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var childrenMenus = []; |
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this.routers.map((router) => { |
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for (var item in router.children) { |
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if (router.children[item].parentPath === undefined) { |
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router.children[item].path = router.path + "/" + router.children[item].path; |
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router.children[item].parentPath = router.path; |
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} |
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childrenMenus.push(router.children[item]); |
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} |
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}); |
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return constantRoutes.concat(childrenMenus); |
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}, |
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// 默认激活的菜单 |
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activeMenu() { |
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const path = this.$route.path; |
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let activePath = this.routers[0].path; |
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if (path.lastIndexOf("/") > 0) { |
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const tmpPath = path.substring(1, path.length); |
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activePath = "/" + tmpPath.substring(0, tmpPath.indexOf("/")); |
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} else if ("/index" == path || "" == path) { |
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if (!this.isFrist) { |
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this.isFrist = true; |
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} else { |
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activePath = "index"; |
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} |
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} |
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this.activeRoutes(activePath); |
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return activePath; |
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}, |
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}, |
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mounted() { |
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this.setVisibleNumber(); |
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}, |
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methods: { |
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// 根据宽度计算设置显示栏数 |
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setVisibleNumber() { |
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const width = document.body.getBoundingClientRect().width - 200; |
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const elWidth = this.$el.getBoundingClientRect().width; |
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const menuItemNodes = this.$el.children; |
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const menuWidth = Array.from(menuItemNodes).map( |
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(i) => i.getBoundingClientRect().width |
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); |
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this.visibleNumber = ( |
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parseInt(width - elWidth) / parseInt(menuWidth) |
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).toFixed(0); |
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}, |
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// 菜单选择事件 |
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handleSelect(key, keyPath) { |
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if (key.indexOf("http://") !== -1 || key.indexOf("https://") !== -1) { |
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// http(s):// 路径新窗口打开 |
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window.open(key, "_blank"); |
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} else { |
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this.activeRoutes(key); |
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} |
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}, |
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// 当前激活的路由 |
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activeRoutes(key) { |
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var routes = []; |
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if (this.childrenMenus && this.childrenMenus.length > 0) { |
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this.childrenMenus.map((item) => { |
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if (key == item.parentPath || (key == "index" && "" == item.path)) { |
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routes.push(item); |
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} |
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}); |
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} |
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this.$store.commit("SET_SIDEBAR_ROUTERS", routes); |
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}, |
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}, |
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}; |
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</script> |
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|
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<style lang="scss" scoped> |
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.el-menu--horizontal > .el-menu-item { |
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float: left; |
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height: 50px; |
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line-height: 50px; |
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margin: 0; |
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border-bottom: 3px solid transparent; |
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color: #999093; |
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padding: 0 5px; |
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margin: 0 10px; |
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} |
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|
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.el-menu--horizontal > .el-menu-item.is-active { |
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border-bottom: 3px solid #409eff; |
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color: #303133; |
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} |
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</style> |
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