v-form-designer新增两个API方法：getWidgetRef、getSelectedWidgetRef。

src/extension/samples/card/card-widget.vue

@@ -41,17 +41,17 @@
 <script>
   import i18n from "@/utils/i18n"
   import containerMixin from "@/components/form-designer/form-widget/container-widget/containerMixin"
-  //import Draggable from 'vuedraggable'
   import ContainerWrapper from "@/components/form-designer/form-widget/container-widget/container-wrapper"
   import FieldComponents from '@/components/form-designer/form-widget/field-widget/index'
+  import refMixinDesign from "@/components/form-designer/refMixinDesign"
   import { ArrowDown, ArrowUp } from '@element-plus/icons-vue'
 
   export default {
     name: "card-widget",
     componentName: 'ContainerWidget',
-    mixins: [i18n, containerMixin],
+    mixins: [i18n, containerMixin, refMixinDesign],
+    inject: ['refList'],
     components: {
-      //Draggable,
       ContainerWrapper,
       ...FieldComponents,
       ArrowDown,
@@ -74,6 +74,9 @@
       },
 
     },
+    created() {
+      this.initRefList()
+    },
     methods: {
       /**
        * 检查接收哪些组件拖放，如不接受某些组件拖放，则根据组件类型判断后返回false