feat(core): expose wheelDelta utility (#1918)

* feat(core): expose wheelDelta utility

Signed-off-by: braks <[email protected]>

* chore(changeset): add

* fix(minimap): apply wheel delta to zoom

Signed-off-by: braks <[email protected]>

* chore(changeset): add

---------

Signed-off-by: braks <[email protected]>

Author: bcakmakoglu

.changeset/perfect-coins-rest.md

@@ -0,0 +1,5 @@
+---
+"@vue-flow/core": minor
+---
+
+Expose `wheelDelta` utility fn

.changeset/quick-dolphins-juggle.md

@@ -0,0 +1,5 @@
+---
+"@vue-flow/minimap": patch
+---
+
+Apply wheelDelta to zoom

examples/vite/src/Basic/CustomNode.vue

@@ -0,0 +1,30 @@
+<script setup>
+import { Handle, Position } from '@vue-flow/core'
+
+const props = defineProps({ handleCount: { type: Number } })
+</script>
+
+<template>
+  <div class="custom-node">
+    <Handle
+      v-for="n in props.handleCount"
+      :id="String(n - 1)"
+      :key="`${n}-${props.handleCount}`"
+      type="target"
+      :position="Position.Top"
+      :style="{ left: `${100 * (n / (props.handleCount + 1))}%` }"
+    />
+    Custom
+  </div>
+</template>
+
+<style>
+.custom-node {
+  min-width: 100px;
+  gap: 4px;
+  padding: 8px;
+  background: white;
+  border: 1px solid black;
+  border-radius: 4px;
+}
+</style>

packages/core/src/container/Viewport/Viewport.vue

@@ -8,7 +8,7 @@ import { PanOnScrollMode } from '../../types'
 import { useKeyPress } from '../../composables/useKeyPress'
 import { useVueFlow } from '../../composables/useVueFlow'
 import { useResizeHandler } from '../../composables/useResizeHandler'
-import { clamp, isMacOs, warn } from '../../utils'
+import { clamp, isMacOs, warn, wheelDelta } from '../../utils'
 import Pane from '../Pane/Pane.vue'
 import Transform from './Transform.vue'
 
@@ -380,12 +380,6 @@ function isRightClickPan(pan: boolean | number[], usedButton: number) {
   return usedButton === 2 && Array.isArray(pan) && pan.includes(2)
 }
 
-function wheelDelta(event: any) {
-  const factor = event.ctrlKey && isMacOs() ? 10 : 1
-
-  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * factor
-}
-
 function viewChanged(prevViewport: ViewportTransform, eventTransform: ZoomTransform) {
   return (
     (prevViewport.x !== eventTransform.x && !Number.isNaN(eventTransform.x)) ||

packages/core/src/index.ts

@@ -48,6 +48,7 @@ export {
   getBoundsofRects,
   connectionExists,
   clamp,
+  wheelDelta,
 } from './utils/graph'
 
 /**

packages/core/src/utils/graph.ts

@@ -21,7 +21,7 @@ import type {
   XYPosition,
   XYZPosition,
 } from '../types'
-import { isDef, snapPosition, warn } from '.'
+import { isDef, isMacOs, snapPosition, warn } from '.'
 
 export function nodeToRect(node: GraphNode): Rect {
   return {
@@ -504,3 +504,9 @@ export function getMarkerId(marker: EdgeMarkerType | undefined, vueFlowId?: stri
     .map((key) => `${key}=${marker[<keyof EdgeMarkerType>key]}`)
     .join('&')}`
 }
+
+export function wheelDelta(event: any) {
+  const factor = event.ctrlKey && isMacOs() ? 10 : 1
+
+  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * factor
+}

packages/minimap/src/MiniMap.vue

@@ -1,6 +1,6 @@
 <script lang="ts" setup>
 import type { CoordinateExtent, GraphNode, PanelPosition } from '@vue-flow/core'
-import { Panel, getBoundsofRects, getConnectedEdges, getRectOfNodes, useVueFlow } from '@vue-flow/core'
+import { Panel, getBoundsofRects, getConnectedEdges, getRectOfNodes, useVueFlow, wheelDelta } from '@vue-flow/core'
 import { zoom, zoomIdentity } from 'd3-zoom'
 import type { D3ZoomEvent } from 'd3-zoom'
 import { pointer, select } from 'd3-selection'
@@ -159,6 +159,7 @@ watchEffect(
       }
 
       const zoomAndPanHandler = zoom()
+        .wheelDelta((event) => wheelDelta(event) * (zoomStep / 10))
         .on('zoom', pannable ? panHandler : () => {})
         .on('zoom.wheel', zoomable ? zoomHandler : () => {})
 
@@ -232,6 +233,7 @@ export default {
         v-for="node of getNodesInitialized"
         :id="node.id"
         :key="node.id"
+        f
         :position="node.computedPosition"
         :dimensions="node.dimensions"
         :selected="node.selected"