Unhandled Exception: mainWindow not found

[LiveRock]

Can't set app to full screen using the following command:

await DesktopWindow.setFullScreen(true);

Error:

[ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: mainWindow not found
#0      DesktopWindow.getWindowSize (package:desktop_window/desktop_window.dart:16:5)
<asynchronous suspension> 

Environment:
MacOS 11.4 Big Sur
Mac Mini M1

Flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.2.3, on macOS 11.4 20F71 darwin-arm, locale en-GB)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[✓] Xcode - develop for iOS and macOS
[✗] Chrome - develop for the web (Cannot find Chrome executable at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome)
! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[✓] Android Studio (version 4.2)
[✓] VS Code (version 1.55.2)
[✓] Connected device (1 available)

What could I have done wrong?

[colatea]

I have the same problem。

flutter: getWindowSize err: PlatformException(MAINWINDOW_NOT_FOUND, GtkWindow not found, null, null), #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:607:7) #1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:156:18) <asynchronous suspension> #2 DesktopWindow.getWindowSize (package:desktop_window/desktop_window.dart:12:17) <asynchronous suspension> #3 FutureExtensions.onError.<anonymous closure> (dart:async/future.dart) <asynchronous suspension>
Environment:
OS: Manjaro Linux x86_64
Kernel: 5.10.56-1-MANJARO

[hyungtaecf]

I got the same problem with the function setMinWindowSize. It was working before, but today it was not working a few times but not logging any error to the console. So I made a print of the result of the function and it says "mainWindow not found".

I'm using MacOS and I call the function before the runApp. The problem seems to happen when the program opens while I am full-screen using the IDE or other screen that is not the desktop where the app opens.

[PhysicalRevelry]

I have the same occurrence pattern as @hyungtaecf Everything runs fine as long as I keep my computer's focus on where the desktop simulator open.

Using MacOS, Flutter 2.13, beta channel

[hi-jin]

PR #33 will help you guys.
I also forked this repo, changed code like PR did, and it works.