From fdff0787ed79913b730e56d8e2d9b1a4f7b7eb76 Mon Sep 17 00:00:00 2001
From: Mouad Debbar <mouad.debbar@gmail.com>
Date: Mon, 23 Sep 2019 15:43:49 -0700
Subject: [PATCH] Don't send pointer events when the framework isn't ready yet
 (#12403)

---
 lib/web_ui/lib/src/engine/pointer_binding.dart | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/web_ui/lib/src/engine/pointer_binding.dart b/lib/web_ui/lib/src/engine/pointer_binding.dart
index 3e2ee972fb6..ef25b617443 100644
--- a/lib/web_ui/lib/src/engine/pointer_binding.dart
+++ b/lib/web_ui/lib/src/engine/pointer_binding.dart
@@ -82,7 +82,10 @@ class PointerBinding {
 
   void _onPointerData(List<ui.PointerData> data) {
     final ui.PointerDataPacket packet = ui.PointerDataPacket(data: data);
-    ui.window?.onPointerDataPacket(packet);
+    final ui.PointerDataPacketCallback callback = ui.window.onPointerDataPacket;
+    if (callback != null) {
+      callback(packet);
+    }
   }
 }