切换tab时，恢复viewport

src/App.vue

@@ -2,7 +2,7 @@
 import Toolbar from './components/Toolbar.vue';
 import ProjectExplorer from './components/ProjectExplorer.vue';
 import ComponentsPanel from './components/flow/ComponentsPanel.vue';
-import { computed, ref, onMounted, onUnmounted, onBeforeUpdate, reactive, provide, inject } from "vue";
+import { computed, ref, onMounted, onUnmounted, onBeforeUpdate, reactive, provide, inject, watch } from "vue";
 import { useFilesStore } from "@/ts/useStore";
 import Vue3DraggableResizable from 'vue3-draggable-resizable';
 import { TabPaneName, TabsPaneContext } from "element-plus";
@@ -24,6 +24,7 @@ const contentHeight = computed(() => `${windowHeight.value - toolbarHeight}px`);
 
 const flowEditorRef = ref(null);
 const flowEditorRefs = ref({});
+const lastActiveFile = ref(filesStore.activeFile);
 
 const handleTabsEdit = (
     targetName: String | undefined,
@@ -85,6 +86,24 @@ const handleAddNode = (nodeData) => {
   }
 };
 
+const handleSaveViewport = (viewport) => {
+  filesStore.updateFileViewport(filesStore.activeFile, viewport);
+};
+const handleRequestViewport = () => {
+  return filesStore.getFileViewport(filesStore.activeFile);
+};
+
+watch(
+  () => filesStore.activeFile,
+  (newVal, oldVal) => {
+    // 切换前保存旧 tab 的 viewport
+    if (oldVal && flowEditorRef.value && flowEditorRef.value.getViewport) {
+      const viewport = flowEditorRef.value.getViewport();
+      filesStore.updateFileViewport(oldVal, viewport);
+    }
+    lastActiveFile.value = newVal;
+  }
+);
 
 </script>
 
@@ -110,20 +129,20 @@ const handleAddNode = (nodeData) => {
               :key="`${file.name}-${filesStore.activeFile}`"
               :label="file.label"
               :name="file.name.toString()"
-          >
+          />
+        </el-tabs>
         <div id="main-container" :style="{ height: contentHeight, overflow: 'auto' }">
-              <!-- 流程图编辑器 -->
           <FlowEditor
-                  :ref="(el) => { if (el) flowEditorRefs[file.name] = el }"
+            ref="flowEditorRef"
             :height="contentHeight"
-
+            :nodes="filesStore.activeFileNodes"
+            :edges="filesStore.activeFileEdges"
+            :viewport="filesStore.getFileViewport(filesStore.activeFile)"
+            :key="filesStore.activeFile"
           />
         </div>
-          </el-tab-pane>
-        </el-tabs>
       </div>
     </div>
-
     <DialogManager />
   </div>
 </template>

src/components/flow/FlowEditor.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, onMounted, shallowRef, markRaw, onUnmounted } from 'vue';
+import { ref, onMounted, shallowRef, markRaw, onUnmounted, watch, nextTick } from 'vue';
 import { VueFlow, useVueFlow, Panel } from '@vue-flow/core';
 import { Background } from '@vue-flow/background';
 import { Controls } from '@vue-flow/controls';
@@ -14,13 +14,15 @@ import ImageNode from './nodes/common/ImageNode.vue';
 import TextNode from './nodes/common/TextNode.vue';
 import useDragAndDrop from '@/ts/useDnD';
 import { useFilesStore } from '@/ts/useStore';
+import type { Node, Edge, ViewportTransform } from '@vue-flow/core';
 
-const props = defineProps({
-  height: {
-    type: String,
-    default: '100%'
-  }
-});
+const props = defineProps<{
+  height: string;
+  nodes: Node[];
+  edges: Edge[];
+  viewport: ViewportTransform;
+}>();
+const emit = defineEmits(['save-viewport', 'request-viewport']);
 
 // 获取文件 store
 const filesStore = useFilesStore();
@@ -35,12 +37,25 @@ const nodeTypes = shallowRef({
 });
 
 // 使用VueFlow的API
-const { onNodesChange, onEdgesChange, onConnect, addNodes, setTransform, getViewport, updateNode } = useVueFlow({
-  nodes: filesStore.activeFileNodes,
-  edges: filesStore.activeFileEdges,
+const { nodes, edges, setNodes, setEdges, setTransform, getViewport, onNodesChange, onEdgesChange, onConnect, addNodes, updateNode } = useVueFlow({
+  nodes: props.nodes,
+  edges: props.edges,
   nodeTypes: nodeTypes.value
 });
 
+// 监听 viewport 变化，重绘视图
+watch(
+  () => props.viewport,
+  (newViewport) => {
+    setTransform(newViewport);
+  },
+  { immediate: true }
+);
+
+onMounted(() => {
+  setTransform(props.viewport);
+});
+
 // 监听节点变化
 const handleNodesChange = (changes) => {
   // 更新 store 中的节点
@@ -170,6 +185,22 @@ onUnmounted(() => {
   // 移除事件监听
   // document.removeEventListener('click', handleClickOutside);
 });
+
+const lastActiveFile = ref(filesStore.activeFile);
+
+const flowEditorRef = ref();
+
+watch(
+  () => filesStore.activeFile,
+  (newVal, oldVal) => {
+    // 切换前保存旧 tab 的 viewport
+    if (oldVal && flowEditorRef.value && flowEditorRef.value.getViewport) {
+      const viewport = flowEditorRef.value.getViewport();
+      filesStore.updateFileViewport(oldVal, viewport);
+    }
+    lastActiveFile.value = newVal;
+  }
+);
 </script>
 
 <template>

src/ts/useStore.ts

@@ -1,6 +1,6 @@
 import { defineStore } from 'pinia';
 import { ref, computed } from 'vue';
-import type { Edge, Node } from '@vue-flow/core';
+import type { Edge, Node, ViewportTransform } from '@vue-flow/core';
 
 // 文件相关的类型定义
 interface FileGroup {
@@ -17,6 +17,7 @@ interface FlowFile {
     groups: FileGroup[];
     nodes?: Node[];
     edges?: Edge[];
+    viewport?: { x: number; y: number; zoom: number };
 }
 
 export const useFilesStore = defineStore('files', () => {
@@ -137,6 +138,21 @@ export const useFilesStore = defineStore('files', () => {
         file.nodes = nodes;
     };
 
+    // 更新文件的 viewport
+    const updateFileViewport = (fileName: string, viewport: { x: number; y: number; zoom: number }) => {
+        const file = fileList.value.find(f => f.name === fileName);
+        if (file) file.viewport = viewport;
+    };
+
+    const getFileViewport = (fileName: string): ViewportTransform => {
+        const file = fileList.value.find(f => f.name === fileName);
+        const v = file?.viewport;
+        if (v && typeof v.x === 'number' && typeof v.y === 'number' && typeof v.zoom === 'number') {
+            return v as ViewportTransform;
+        }
+        return { x: 0, y: 0, zoom: 1 };
+    };
+
     return {
         fileList,
         activeFile,
@@ -152,5 +168,7 @@ export const useFilesStore = defineStore('files', () => {
         removeEdge,
         updateNodePosition,
         updateNodesOrder,
+        updateFileViewport,
+        getFileViewport,
     };
 });