[Web] Listener widget does not trigger PointerPanZoom callbacks #174251
Description
Steps to reproduce
- Run the sample code
- Use a trackpad gesture (e.g. two-finger pinch or scroll) over the blue box.
- Observe that no pan/zoom events are printed to the console.
Expected results
Pointer pan/zoom gestures (e.g. trackpad pinch or pan) should trigger the corresponding callbacks.
Actual results
No PointerPanZoom events are triggered on Web. The same code works as expected on macOS.
Code sample
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(const MainApp());
}
class MainApp extends StatelessWidget {
const MainApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Listener(
onPointerPanZoomStart: (event) {
print('pointer pan zoom started');
},
onPointerPanZoomUpdate: (event) {
print('pointer pan zoom updated');
},
onPointerPanZoomEnd: (event) {
print('pointer pan zoom ended');
},
child: Container(color: Colors.blue, width: 300, height: 300),
),
);
}
}
Screenshots or Video
Screenshots / Video demonstration
[Upload media here]
Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
❯ flutter doctor -v
[✓] Flutter (Channel stable, 3.35.1, on macOS 15.6 24G84 darwin-arm64, locale en-VN) [288ms]
• Flutter version 3.35.1 on channel stable at /Users/khoa.nguyen/fvm/versions/3.35.1
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 20f8274939 (7 days ago), 2025-08-14 10:53:09 -0700
• Engine revision 1e9a811bf8
• Dart version 3.9.0
• DevTools version 2.48.0
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations,
enable-lldb-debugging
[!] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [1,172ms]
• Android SDK at /Users/khoa.nguyen/Library/Android/sdk
• Emulator version 35.5.10.0 (build_id 13402964) (CL:N/A)
• Platform android-36, build-tools 36.0.0
• Java binary at: /opt/homebrew/opt/openjdk@17/bin/java
This JDK is specified in your Flutter configuration.
To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment Homebrew (build 17.0.15+0)
! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses
[✓] Xcode - develop for iOS and macOS (Xcode 16.4) [808ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16F6
• CocoaPods version 1.16.2
[✓] Chrome - develop for the web [7ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2024.3) [7ms]
• Android Studio at /Users/khoa.nguyen/Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 21.0.6+-13368085-b895.109)
[✓] VS Code (version 1.103.1) [6ms]
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.116.0
[✓] Connected device (3 available) [5.9s]
• iPhone 16 Pro Max (mobile) • 1FB5DCF2-7F04-4919-8C57-0E963C451C35 • ios • com.apple.CoreSimulator.SimRuntime.iOS-18-5 (simulator)
• macOS (desktop) • macos • darwin-arm64 • macOS 15.6 24G84 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 139.0.7258.128
[✓] Network resources [1,055ms]
• All expected network resources are available.
! Doctor found issues in 1 category.