Allow dragging model library outputs onto existing nodes

src/components/graph/GraphCanvas.vue

@@ -46,7 +46,10 @@ import type { RenderedTreeExplorerNode } from '@/types/treeExplorerTypes'
 import { useNodeBookmarkStore } from '@/stores/nodeBookmarkStore'
 import { useCanvasStore } from '@/stores/graphStore'
 import { ComfyModelDef } from '@/stores/modelStore'
-import { useModelToNodeStore } from '@/stores/modelToNodeStore'
+import {
+  ModelNodeProvider,
+  useModelToNodeStore
+} from '@/stores/modelToNodeStore'
 import GraphCanvasMenu from '@/components/graph/GraphCanvasMenu.vue'
 
 const emit = defineEmits(['ready'])
@@ -143,15 +146,33 @@ onMounted(async () => {
           comfyApp.addNodeOnGraph(nodeDef, { pos })
         } else if (node.data instanceof ComfyModelDef) {
           const model = node.data
-          const provider = modelToNodeStore.getNodeProvider(model.directory)
-          if (provider) {
-            const pos = comfyApp.clientPosToCanvasPos([
-              loc.clientX - 20,
-              loc.clientY
-            ])
-            const node = comfyApp.addNodeOnGraph(provider.nodeDef, { pos })
-            const widget = node.widgets.find(
-              (widget) => widget.name === provider.key
+          const pos = comfyApp.clientPosToCanvasPos([loc.clientX, loc.clientY])
+          const nodeAtPos = comfyApp.graph.getNodeOnPos(pos[0], pos[1])
+          let targetProvider: ModelNodeProvider | null = null
+          let targetGraphNode: LGraphNode | null = null
+          if (nodeAtPos) {
+            const providers = modelToNodeStore.getAllNodeProviders(
+              model.directory
+            )
+            for (const provider of providers) {
+              if (provider.nodeDef.name === nodeAtPos.comfyClass) {
+                targetGraphNode = nodeAtPos
+                targetProvider = provider
+              }
+            }
+          }
+          if (!targetGraphNode) {
+            const provider = modelToNodeStore.getNodeProvider(model.directory)
+            if (provider) {
+              targetGraphNode = comfyApp.addNodeOnGraph(provider.nodeDef, {
+                pos
+              })
+              targetProvider = provider
+            }
+          }
+          if (targetGraphNode) {
+            const widget = targetGraphNode.widgets.find(
+              (widget) => widget.name === targetProvider.key
             )
             if (widget) {
               widget.value = model.name

src/stores/modelToNodeStore.ts

@@ -1,7 +1,6 @@
 import { ComfyNodeDefImpl } from '@/stores/nodeDefStore'
 import { useNodeDefStore } from '@/stores/nodeDefStore'
 import { defineStore } from 'pinia'
-import { toRaw } from 'vue'
 
 /** Helper class that defines how to construct a node from a model. */
 export class ModelNodeProvider {
@@ -20,7 +19,7 @@ export class ModelNodeProvider {
 /** Service for mapping model types (by folder name) to nodes. */
 export const useModelToNodeStore = defineStore('modelToNode', {
   state: () => ({
-    modelToNodeMap: {} as Record<string, ModelNodeProvider>,
+    modelToNodeMap: {} as Record<string, ModelNodeProvider[]>,
     nodeDefStore: useNodeDefStore(),
     haveDefaultsLoaded: false
   }),
@@ -31,6 +30,16 @@ export const useModelToNodeStore = defineStore('modelToNode', {
      * @returns The node provider for the given model type name.
      */
     getNodeProvider(modelType: string): ModelNodeProvider {
+      this.registerDefaults()
+      return this.modelToNodeMap[modelType]?.[0]
+    },
+
+    /**
+     * Get the list of all valid node providers for the given model type name.
+     * @param modelType The name of the model type to get the node providers for.
+     * @returns The list of all valid node providers for the given model type name.
+     */
+    getAllNodeProviders(modelType: string): ModelNodeProvider[] {
       this.registerDefaults()
       return this.modelToNodeMap[modelType]
     },
@@ -42,7 +51,21 @@ export const useModelToNodeStore = defineStore('modelToNode', {
      */
     registerNodeProvider(modelType: string, nodeProvider: ModelNodeProvider) {
       this.registerDefaults()
-      this.modelToNodeMap[modelType] = nodeProvider
+      this.modelToNodeMap[modelType] ??= []
+      this.modelToNodeMap[modelType].push(nodeProvider)
+    },
+
+    /**
+     * Register a node provider for the given simple names.
+     * @param modelType The name of the model type to register the node provider for.
+     * @param nodeClass The node class name to register.
+     * @param key The key to use for the node input.
+     */
+    quickRegister(modelType: string, nodeClass: string, key: string) {
+      this.registerNodeProvider(
+        modelType,
+        new ModelNodeProvider(this.nodeDefStore.nodeDefsByName[nodeClass], key)
+      )
     },
 
     registerDefaults() {
@@ -53,34 +76,16 @@ export const useModelToNodeStore = defineStore('modelToNode', {
         return
       }
       this.haveDefaultsLoaded = true
-      this.registerNodeProvider(
+      this.quickRegister('checkpoints', 'CheckpointLoaderSimple', 'ckpt_name')
+      this.quickRegister(
         'checkpoints',
-        new ModelNodeProvider(
-          this.nodeDefStore.nodeDefsByName['CheckpointLoaderSimple'],
-          'ckpt_name'
-        )
-      )
-      this.registerNodeProvider(
-        'loras',
-        new ModelNodeProvider(
-          this.nodeDefStore.nodeDefsByName['LoraLoader'],
-          'lora_name'
-        )
-      )
-      this.registerNodeProvider(
-        'vae',
-        new ModelNodeProvider(
-          this.nodeDefStore.nodeDefsByName['VAELoader'],
-          'vae_name'
-        )
-      )
-      this.registerNodeProvider(
-        'controlnet',
-        new ModelNodeProvider(
-          this.nodeDefStore.nodeDefsByName['ControlNetLoader'],
-          'control_net_name'
-        )
+        'ImageOnlyCheckpointLoader',
+        'ckpt_name'
       )
+      this.quickRegister('loras', 'LoraLoader', 'lora_name')
+      this.quickRegister('loras', 'LoraLoaderModelOnly', 'lora_name')
+      this.quickRegister('vae', 'VAELoader', 'vae_name')
+      this.quickRegister('controlnet', 'ControlNetLoader', 'control_net_name')
     }
   }
 })