Can no longer make windows transparent on Linux in Flutter 3.22 #152154
Description
Steps to reproduce
- Create a new project
- Make the background transparent as shown below in the code sample
flutter run
Expected results
The background should be transparent.
Actual results
The background is opaque black.
Code sample
Code sample
Add this to linux/my_application.cc:
GdkVisual* visual;
gtk_widget_set_app_paintable(GTK_WIDGET(window), TRUE);
visual = gdk_screen_get_rgba_visual(screen);
if (visual != NULL && gdk_screen_is_composited(screen)) {
gtk_widget_set_visual(GTK_WIDGET(window), visual);
}Make the scaffold transparent in lib/main.dart:
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
scaffoldBackgroundColor: Colors.transparent,
useMaterial3: true,
),Screenshots or Video
Screenshots / Video demonstration
3.19.6:
3.22.3:
Logs
No response
Flutter Doctor output
Doctor output
[!] Flutter (Channel [user-branch], 3.22.3, on Arch Linux 6.9.10-arch1-1, locale en_US.UTF-8)
! Flutter version 3.22.3 on channel [user-branch] at /home/dark/.cache/flutter_sdk
Currently on an unknown channel. Run `flutter channel` to switch to an official channel.
If that doesn't fix the issue, reinstall Flutter by following instructions at https://flutter.dev/docs/get-started/install.
! Upstream repository unknown source is not a standard remote.
Set environment variable "FLUTTER_GIT_URL" to unknown source to dismiss this error.
• Framework revision b0850beeb2 (6 days ago), 2024-07-16 21:43:41 -0700
• Engine revision 235db911ba
• Dart version 3.4.4
• DevTools version 2.34.3
• If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.
[✗] Android toolchain - develop for Android devices
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).
If the Android SDK has been installed to a custom location, please use
`flutter config --android-sdk` to update to that location.
[✗] Chrome - develop for the web (Cannot find Chrome executable at google-chrome)
! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Linux toolchain - develop for Linux desktop
• clang version 18.1.8
• cmake version 3.30.1
• ninja version 1.12.1
• pkg-config version 2.1.1
[!] Android Studio (not installed)
• Android Studio not found; download from https://developer.android.com/studio/index.html
(or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).
[✓] Connected device (1 available)
• Linux (desktop) • linux • linux-x64 • Arch Linux 6.9.10-arch1-1
[✓] Network resources
• All expected network resources are available.
! Doctor found issues in 4 categories.(I installed flutter-bin from the AUR and am using git checkout 3.22.3 in /opt/flutter to change versions)