智慧宿舍系统小程序

wechat/miniprogram/node_modules/@vant/weapp/dist/dropdown-menu/index.js

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+import { VantComponent } from '../common/component';
+import { useChildren } from '../common/relation';
+import { addUnit, getRect, getSystemInfoSync } from '../common/utils';
+let ARRAY = [];
+VantComponent({
+  field: true,
+  relation: useChildren('dropdown-item', function () {
+    this.updateItemListData();
+  }),
+  props: {
+    activeColor: {
+      type: String,
+      observer: 'updateChildrenData',
+    },
+    overlay: {
+      type: Boolean,
+      value: true,
+      observer: 'updateChildrenData',
+    },
+    zIndex: {
+      type: Number,
+      value: 10,
+    },
+    duration: {
+      type: Number,
+      value: 200,
+      observer: 'updateChildrenData',
+    },
+    direction: {
+      type: String,
+      value: 'down',
+      observer: 'updateChildrenData',
+    },
+    closeOnClickOverlay: {
+      type: Boolean,
+      value: true,
+      observer: 'updateChildrenData',
+    },
+    closeOnClickOutside: {
+      type: Boolean,
+      value: true,
+    },
+  },
+  data: {
+    itemListData: [],
+  },
+  beforeCreate() {
+    const { windowHeight } = getSystemInfoSync();
+    this.windowHeight = windowHeight;
+    ARRAY.push(this);
+  },
+  destroyed() {
+    ARRAY = ARRAY.filter((item) => item !== this);
+  },
+  methods: {
+    updateItemListData() {
+      this.setData({
+        itemListData: this.children.map((child) => child.data),
+      });
+    },
+    updateChildrenData() {
+      this.children.forEach((child) => {
+        child.updateDataFromParent();
+      });
+    },
+    toggleItem(active) {
+      this.children.forEach((item, index) => {
+        const { showPopup } = item.data;
+        if (index === active) {
+          item.toggle();
+        } else if (showPopup) {
+          item.toggle(false, { immediate: true });
+        }
+      });
+    },
+    close() {
+      this.children.forEach((child) => {
+        child.toggle(false, { immediate: true });
+      });
+    },
+    getChildWrapperStyle() {
+      const { zIndex, direction } = this.data;
+      return getRect(this, '.van-dropdown-menu').then((rect) => {
+        const { top = 0, bottom = 0 } = rect;
+        const offset = direction === 'down' ? bottom : this.windowHeight - top;
+        let wrapperStyle = `z-index: ${zIndex};`;
+        if (direction === 'down') {
+          wrapperStyle += `top: ${addUnit(offset)};`;
+        } else {
+          wrapperStyle += `bottom: ${addUnit(offset)};`;
+        }
+        return wrapperStyle;
+      });
+    },
+    onTitleTap(event) {
+      const { index } = event.currentTarget.dataset;
+      const child = this.children[index];
+      if (!child.data.disabled) {
+        ARRAY.forEach((menuItem) => {
+          if (
+            menuItem &&
+            menuItem.data.closeOnClickOutside &&
+            menuItem !== this
+          ) {
+            menuItem.close();
+          }
+        });
+        this.toggleItem(index);
+      }
+    },
+  },
+});