diff --git a/packages/x6-plugin-selection/src/index.ts b/packages/x6-plugin-selection/src/index.ts
index 8554fe2e256..3e7dba6fc2b 100644
--- a/packages/x6-plugin-selection/src/index.ts
+++ b/packages/x6-plugin-selection/src/index.ts
@@ -320,11 +320,7 @@ export class Selection
   }
 
   protected onBlankMouseDown({ e }: EventArgs['blank:mousedown']) {
-    const eventTypes = this.options.eventTypes
-    if (
-      !(eventTypes && eventTypes.includes('leftMouseDown') && e.button === 0) &&
-      !(eventTypes && eventTypes.includes('mouseWheelDown') && e.button === 1)
-    ) {
+    if (!this.allowBlankMouseDown(e)) {
       return
     }
 
@@ -339,6 +335,14 @@ export class Selection
     }
   }
 
+  protected allowBlankMouseDown(e: Dom.MouseDownEvent) {
+    const eventTypes = this.options.eventTypes
+    return (
+      (eventTypes?.includes('leftMouseDown') && e.button === 0) ||
+      (eventTypes?.includes('mouseWheelDown') && e.button === 1)
+    )
+  }
+
   protected onBlankClick() {
     this.clean()
   }
diff --git a/packages/x6/src/graph/panning.ts b/packages/x6/src/graph/panning.ts
index 03b8fc99eff..26e67fb9945 100644
--- a/packages/x6/src/graph/panning.ts
+++ b/packages/x6/src/graph/panning.ts
@@ -101,13 +101,10 @@ export class PanningManager extends Base {
   }
 
   protected onMouseDown({ e }: { e: Dom.MouseDownEvent }) {
-    const eventTypes = this.widgetOptions.eventTypes
-    if (
-      !(eventTypes && eventTypes.includes('leftMouseDown') && e.button === 0) &&
-      !(eventTypes && eventTypes.includes('mouseWheelDown') && e.button === 1)
-    ) {
+    if (!this.allowBlankMouseDown(e)) {
       return
     }
+
     const selection = this.graph.getPlugin<any>('selection')
     const allowRubberband = selection && selection.allowRubberband(e, true)
     if (
@@ -120,17 +117,17 @@ export class PanningManager extends Base {
 
   protected onRightMouseDown(e: Dom.MouseDownEvent) {
     const eventTypes = this.widgetOptions.eventTypes
-    if (!(eventTypes && eventTypes.includes('rightMouseDown'))) {
+    if (!(eventTypes?.includes('rightMouseDown') && e.button === 2)) {
       return
     }
-    if (e.button === 2 && this.allowPanning(e, true)) {
+    if (this.allowPanning(e, true)) {
       this.startPanning(e)
     }
   }
 
   protected onMouseWheel(e: WheelEvent, deltaX: number, deltaY: number) {
     const eventTypes = this.widgetOptions.eventTypes
-    if (!(eventTypes && eventTypes.includes('mouseWheel'))) {
+    if (!eventTypes?.includes('mouseWheel')) {
       return
     }
     if (!e.ctrlKey) {
@@ -138,6 +135,14 @@ export class PanningManager extends Base {
     }
   }
 
+  protected allowBlankMouseDown(e: Dom.MouseDownEvent) {
+    const eventTypes = this.widgetOptions.eventTypes
+    return (
+      (eventTypes?.includes('leftMouseDown') && e.button === 0) ||
+      (eventTypes?.includes('mouseWheelDown') && e.button === 1)
+    )
+  }
+
   protected allowMouseWheel(e: WheelEvent) {
     return this.pannable && !e.ctrlKey
   }