refactor example demo (#713)

* refactor: Adjust the example directory structure

* perf form demo

* refine editor-slide-upload css

* refine demo

src/views/example/components/Dropdown/Comment.vue

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+<template>
+  <el-dropdown trigger="click" :show-timeout="100">
+    <el-button plain>{{!comment_disabled?'评论已打开':'评论已关闭'}}
+      <i class="el-icon-caret-bottom el-icon--right"></i>
+    </el-button>
+    <el-dropdown-menu class="no-padding" slot="dropdown">
+      <el-dropdown-item>
+        <el-radio-group style="padding: 10px;" v-model="comment_disabled">
+          <el-radio :label="true">关闭评论</el-radio>
+          <el-radio :label="false">打开评论</el-radio>
+        </el-radio-group>
+      </el-dropdown-item>
+    </el-dropdown-menu>
+  </el-dropdown>
+</template>
+
+<script>
+export default {
+  props: ['value'],
+  computed: {
+    comment_disabled: {
+      get() {
+        return this.value
+      },
+      set(val) {
+        this.$emit('input', val)
+      }
+    }
+  }
+}
+</script>

src/views/example/components/Dropdown/Platform.vue

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+<template>
+  <el-dropdown :hide-on-click="false" :show-timeout="100" trigger="click">
+    <el-button plain>
+      平台({{platforms.length}})
+      <i class="el-icon-caret-bottom el-icon--right"></i>
+    </el-button>
+    <el-dropdown-menu class="no-border" slot="dropdown">
+      <el-checkbox-group v-model="platforms" style="padding: 5px 15px;">
+        <el-checkbox v-for="item in platformsOptions" :label="item.key" :key="item.key">
+          {{item.name}}
+        </el-checkbox>
+      </el-checkbox-group>
+    </el-dropdown-menu>
+  </el-dropdown>
+</template>
+
+<script>
+export default {
+  props: ['value'],
+  data() {
+    return {
+      platformsOptions: [
+        { key: 'a-platform', name: 'a-platform' },
+        { key: 'b-platform', name: 'b-platform' },
+        { key: 'c-platform', name: 'c-platform' }
+      ]
+    }
+  },
+  computed: {
+    platforms: {
+      get() {
+        return this.value
+      },
+      set(val) {
+        this.$emit('input', val)
+      }
+    }
+  }
+}
+</script>

src/views/example/components/Dropdown/SourceUrl.vue

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+<template>
+  <el-dropdown :show-timeout="100" trigger="click">
+    <el-button plain>
+      外链
+      <i class="el-icon-caret-bottom el-icon--right"></i>
+    </el-button>
+    <el-dropdown-menu class="no-padding no-border" style="width:400px" slot="dropdown">
+      <el-form-item label-width="0px" style="margin-bottom: 0px" prop="source_uri">
+        <el-input placeholder="请输入内容" v-model="source_uri">
+          <template slot="prepend">填写url</template>
+        </el-input>
+      </el-form-item>
+    </el-dropdown-menu>
+  </el-dropdown>
+</template>
+
+<script>
+export default {
+  props: ['value'],
+  computed: {
+    source_uri: {
+      get() {
+        return this.value
+      },
+      set(val) {
+        this.$emit('input', val)
+      }
+    }
+  }
+}
+</script>

src/views/example/components/Dropdown/index.js

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+export { default as CommentDropdown } from './Comment'
+export { default as PlatformDropdown } from './Platform'
+export { default as SourceUrlDropdown } from './SourceUrl'