Fix: In standard mode, don't stop when you hit a Vue node. (#5445)

* fix: Forward the scrolling events to the litegraph canvas.

* prior-art: Use the existing event forwarding logic from useCanvasInteractions (h/t Ben)

* fix: Get proper scaling from properties in the original event, fix browser zoom

* tests: Fix missing property on mock

* types: Cleanup type annotations in the test

* cleanup: Initialize the mocks in place.

* tests: extract createMockPointerEvent

* tests: extract createMockWheelEvent

* tests: extract createMockLGraphCanvas

* tests: Add additional assertion for stopPropagation

* tests: Comment pruning, test rename suggested by @arjansingh

src/components/graph/GraphCanvas.vue

@@ -36,6 +36,7 @@
     v-if="isVueNodesEnabled && comfyApp.canvas && comfyAppReady"
     :canvas="comfyApp.canvas"
     @transform-update="handleTransformUpdate"
+    @wheel.capture="canvasInteractions.forwardEventToCanvas"
   >
     <!-- Vue nodes rendered based on graph nodes -->
     <VueGraphNode
@@ -96,6 +97,7 @@ import NodeSearchboxPopover from '@/components/searchbox/NodeSearchBoxPopover.vu
 import SideToolbar from '@/components/sidebar/SideToolbar.vue'
 import SecondRowWorkflowTabs from '@/components/topbar/SecondRowWorkflowTabs.vue'
 import { useChainCallback } from '@/composables/functional/useChainCallback'
+import { useCanvasInteractions } from '@/composables/graph/useCanvasInteractions'
 import { useViewportCulling } from '@/composables/graph/useViewportCulling'
 import { useVueNodeLifecycle } from '@/composables/graph/useVueNodeLifecycle'
 import { useNodeBadge } from '@/composables/node/useNodeBadge'
@@ -147,6 +149,8 @@ const workspaceStore = useWorkspaceStore()
 const canvasStore = useCanvasStore()
 const executionStore = useExecutionStore()
 const toastStore = useToastStore()
+const canvasInteractions = useCanvasInteractions()
+
 const betaMenuEnabled = computed(
   () => settingStore.get('Comfy.UseNewMenu') !== 'Disabled'
 )

src/composables/graph/useCanvasInteractions.ts

@@ -24,14 +24,12 @@ export function useCanvasInteractions() {
   const handleWheel = (event: WheelEvent) => {
     // In standard mode, Ctrl+wheel should go to canvas for zoom
     if (isStandardNavMode.value && (event.ctrlKey || event.metaKey)) {
-      event.preventDefault() // Prevent browser zoom
       forwardEventToCanvas(event)
       return
     }
 
     // In legacy mode, all wheel events go to canvas for zoom
     if (!isStandardNavMode.value) {
-      event.preventDefault()
       forwardEventToCanvas(event)
       return
     }
@@ -68,9 +66,30 @@ export function useCanvasInteractions() {
   ) => {
     const canvasEl = app.canvas?.canvas
     if (!canvasEl) return
+    event.preventDefault()
+    event.stopPropagation()
+
+    if (event instanceof WheelEvent) {
+      const { clientX, clientY, deltaX, deltaY, ctrlKey, metaKey, shiftKey } =
+        event
+      canvasEl.dispatchEvent(
+        new WheelEvent('wheel', {
+          clientX,
+          clientY,
+          deltaX,
+          deltaY,
+          ctrlKey,
+          metaKey,
+          shiftKey
+        })
+      )
+      return
+    }
 
     // Create new event with same properties
-    const EventConstructor = event.constructor as typeof WheelEvent
+    const EventConstructor = event.constructor as
+      | typeof MouseEvent
+      | typeof PointerEvent
     const newEvent = new EventConstructor(event.type, event)
     canvasEl.dispatchEvent(newEvent)
   }