Don't send pointer events when the framework isn't ready yet (#12403)

mdebbar · web-flow · commit fdff0787ed79 · 2019-09-23T15:43:49.000-07:00
diff --git 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);
+    }
   }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -82,7 +82,10 @@ class PointerBinding {`
`82`	`82`
`83`	`83`	`void _onPointerData(List<ui.PointerData> data) {`
`84`	`84`	`final ui.PointerDataPacket packet = ui.PointerDataPacket(data: data);`
`85`		`- ui.window?.onPointerDataPacket(packet);`
	`85`	`+ final ui.PointerDataPacketCallback callback = ui.window.onPointerDataPacket;`
	`86`	`+ if (callback != null) {`
	`87`	`+ callback(packet);`
	`88`	`+ }`
`86`	`89`	`}`
`87`	`90`	`}`
`88`	`91`