From 2862b3ff0ccfb0cbf6446f8621b859b813643456 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?0o=E5=BC=A0=E4=B8=8D=E6=AD=AAo0?= <zhangzheng7856@126.com>
Date: Tue, 21 Jun 2022 15:56:49 +0800
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8(component):=20cascader=E7=BB=84?=
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ISSUES CLOSED: #I4RSDS
---
 .../src/component/cascader/index.less         | 14 +--
 .../src/component/cascader/index.vue          | 96 +++++++++----------
 .../src/document/zh-CN/components/cascader.md |  4 +-
 3 files changed, 50 insertions(+), 64 deletions(-)

diff --git a/package/component/src/component/cascader/index.less b/package/component/src/component/cascader/index.less
index 1f1e49bc..21661018 100644
--- a/package/component/src/component/cascader/index.less
+++ b/package/component/src/component/cascader/index.less
@@ -10,24 +10,16 @@
 }
 
 .layui-cascader .layui-cascader-panel {
-  position: absolute;
-  margin-top: 2px;
-  z-index: 899;
-  background-color: #fff;
   box-sizing: border-box;
-  border: 1px solid #e4e7ed;
   border-radius: 2px;
-  box-shadow: 0 2px 12px #0000001a;
   line-height: 26px;
   color: #000c;
   font-size: 14px;
   white-space: nowrap;
-  display: none;
+  display: inline-flex;
 }
 .layui-cascader-menu {
   border-right: 1px solid var(--global-neutral-color-3);
-  max-height: 360px;
-  overflow-y: scroll;
 }
 .layui-cascader-menu:last-child {
   border-right: none;
@@ -50,6 +42,6 @@
   background-color: var(--global-checked-color);
   color: white;
 }
-.layui-cascader-open .layui-cascader-panel {
-  display: flex !important;
+.layui-dropdown-up > dl {
+  min-width: unset;
 }
diff --git a/package/component/src/component/cascader/index.vue b/package/component/src/component/cascader/index.vue
index 9616acae..9676ad46 100644
--- a/package/component/src/component/cascader/index.vue
+++ b/package/component/src/component/cascader/index.vue
@@ -1,48 +1,45 @@
 <template>
-  <div
-    class="layui-cascader"
-    :class="[{ 'layui-cascader-open': open }]"
-    ref="cascaderRef"
-  >
-    <div @click="open = !open">
-      <lay-input
-        v-model="displayValue"
-        readonly
-        suffix-icon="layui-icon-down"
-        :placeholder="placeholder"
-        v-if="!slots.default"
-      ></lay-input>
-      <slot v-else></slot>
-    </div>
+  <lay-dropdown class="layui-cascader" ref="dropdownRef">
+    <lay-input
+      v-model="displayValue"
+      readonly
+      suffix-icon="layui-icon-down"
+      :placeholder="placeholder"
+      v-if="!slots.default"
+    ></lay-input>
+    <slot v-else></slot>
 
-    <dl class="layui-cascader-panel layui-anim layui-anim-upbit">
-      <template v-for="(itemCol, index) in treeData">
-        <ul
-          class="layui-cascader-menu"
-          :key="'cascader-menu' + index"
-          v-if="itemCol.data.length"
-        >
-          <li
-            class="layui-cascader-menu-item"
-            v-for="(item, i) in itemCol.data"
-            :key="index + i"
-            @click="selectBar(item, i, index)"
-            :class="[
-              {
-                'layui-cascader-selected': itemCol.selectIndex === i,
-              },
-            ]"
+    <template #content>
+      <div class="layui-cascader-panel">
+        <template v-for="(itemCol, index) in treeData">
+          <lay-scroll
+            height="180px"
+            class="layui-cascader-menu"
+            :key="'cascader-menu' + index"
+            v-if="itemCol.data.length"
           >
-            {{ item.label }}
-            <i
-              class="layui-icon layui-icon-right"
-              v-if="item.children && item.children.length"
-            ></i>
-          </li>
-        </ul>
-      </template>
-    </dl>
-  </div>
+            <div
+              class="layui-cascader-menu-item"
+              v-for="(item, i) in itemCol.data"
+              :key="index + i"
+              @click="selectBar(item, i, index)"
+              :class="[
+                {
+                  'layui-cascader-selected': itemCol.selectIndex === i,
+                },
+              ]"
+            >
+              {{ item.label }}
+              <i
+                class="layui-icon layui-icon-right"
+                v-if="item.children && item.children.length"
+              ></i>
+            </div>
+          </lay-scroll>
+        </template>
+      </div>
+    </template>
+  </lay-dropdown>
 </template>
 
 <script lang="ts">
@@ -54,18 +51,17 @@ export default {
 <script setup lang="ts">
 import "./index.less";
 import { ref, onMounted, watch, useSlots } from "vue";
-import { onClickOutside } from "@vueuse/core";
 export interface LayCascaderProps {
   options?: Array<any> | null;
   modelValue?: string;
   decollator?: string;
-  placeholder?:string;
+  placeholder?: string;
 }
 const props = withDefaults(defineProps<LayCascaderProps>(), {
   options: null,
   modelValue: "",
   decollator: "/",
-  placeholder:''
+  placeholder: "",
 });
 const emit = defineEmits(["update:modelValue", "change", "clear"]);
 
@@ -199,15 +195,13 @@ const selectBar = (item: any, selectIndex: number, parentIndex: number) => {
       .join(props.decollator);
     emit("update:modelValue", value);
     emit("change", displayValue.value);
-    open.value = false;
+    if (dropdownRef.value)
+      // @ts-ignore
+      dropdownRef.value.hide();
   }
 };
 
-const open = ref<boolean>(false);
 const displayValue = ref<string | number | null>(null);
 const slots = useSlots();
-const cascaderRef = ref<null | HTMLElement>();
-onClickOutside(cascaderRef, () => {
-  open.value = false;
-});
+const dropdownRef = ref(null);
 </script>
diff --git a/package/document/src/document/zh-CN/components/cascader.md b/package/document/src/document/zh-CN/components/cascader.md
index 8f08dfc9..c1a0e364 100644
--- a/package/document/src/document/zh-CN/components/cascader.md
+++ b/package/document/src/document/zh-CN/components/cascader.md
@@ -13,7 +13,7 @@
 ::: demo 使用 `lay-cascader` 标签创建级联选择器
 
 <template>
-  <lay-cascader :options="options" v-model="value" placeholder="点我试一试"></lay-cascader>
+  <lay-cascader :options="options" v-model="value" placeholder="点我试一试" style="width:250px"></lay-cascader>
   <br>
   <span>输出的值：{{value}}</span>
 </template>
@@ -297,7 +297,7 @@ const options = [
 :::
 ::: demo 使用 `decollator` 属性 自定义分割符号
 <template>
-  <lay-cascader :options="options" v-model="value1" decollator="-" placeholder="我可以自定义分割符号"></lay-cascader>
+  <lay-cascader :options="options" v-model="value1" decollator="-" placeholder="我可以自定义分割符号" style="width:250px"></lay-cascader>
   <br>
   <span>输出的值：{{value1}}</span>
 </template>