globalPosition returned by GestureDragUpdateCallback is compromised when app is suspended #24665
Description
Steps to Reproduce
In the following widget, if I start a drag gesture and if I suspend the app (like receiving a phone call) then the value of globalPosition is totally random.
class DemoScreen extends StatelessWidget {
@override
Widget build(BuildContext context) => Scaffold(
body: GestureDetector(
onPanUpdate: (details) => print(details.globalPosition),
child: Container(
color: Colors.orange,
),
),
);
}Log
flutter: Offset(96.3, 374.0)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(96.7, 374.3)
flutter: Offset(-50.8, 1422.5) -> when app is suspended
Flutter doctor
flutter doctor -v
[✓] Flutter (Channel unknown, v0.10.2, on Mac OS X 10.13.6 17G65, locale en-NL)
• Flutter version 0.10.2 at /Users/user/IdeaProjects/hue_blue/flutter
• Framework revision d8cbb80206 (4 weeks ago), 2018-10-26 01:30:21 -0400
• Engine revision 6c2ade9fa2
• Dart version 2.1.0-dev.8.0.flutter-bf26f760b1
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[✓] iOS toolchain - develop for iOS devices (Xcode 10.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.1, Build version 10B61
• ios-deploy 2.0.0
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[!] Android Studio (not installed)
• Android Studio not found; download from https://developer.android.com/studio/index.html
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[✓] IntelliJ IDEA Community Edition (version 2018.1.6)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
• Flutter plugin version 30.0.1
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[✓] Connected device (1 available)
• iPhone XS • B74C2265-233F-4EAB-89B5-6850589648EF • ios • iOS 12.1 (simulator)
! Doctor found issues in 2 categories.