// .....
class XxxState extends State<Xxx> with WindowListener {
@override
void initState() {
lazyInit();
}
lazyInit() async {
  windowManager.addListener(this);
  await windowManager.setMinimumSize(Size(1280, 720));  // <-- when start the app on windows, I can still resize the window to any size
}
}

environment:

Flutter 2.8.1 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 77d935af4d (4 weeks ago) • 2021-12-16 08:37:33 -0800
Engine • revision 890a5fca2e
Tools • Dart 2.15.1

Visual Studio Community 2019 16.11.8
Microsoft Windows [Version 10.0.19042.1110], locale zh-CN

Upon trying to retrieve the window size, the error "(MAINWINDOW_NOT_FOUND, GtkWindow not found, null, null)" is thrown.

No matter where I attempt to retrieve the window size, be it on the loading of the app or by the press of a button after the window is already loaded and fully initialised, this error still occurs.

After setting this, I am still able to make the desktop macOs app smaller than 400x400 in width and height.

Is there something additional that I need to perform apart from DesktopWindow.setMinWindowSize() to not let it be smaller than what I am setting in the width and height here?

Hello, In macOS, there is a problem where the generated file from flutter is throwing an error. Although the program runs fine when using 'flutter run' when trying a native build from XCode an error is immediately thrown and is picked up as a compiler error.

If anyone knows the solution to this problem please let me know.

Thanks, Rhino Inani

A screenshot of the problem is shown below.

Code cleanup in general & fix my linux mess, please merge only after testing in #18, I will merge the changes after testing there here

Closes #9 Closes #14

Add support for for moving titlebar & borders of the window. I've tested my code on linux but I don't have a ~~windows or~~ macos buildchain available, so please someone test & fix it for me, I tried to get the correct code from the docs.

Closes #15

Edit: tested on Windows 26/06/2021 and fixed, works now

[ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: MissingPluginException(No implementation found for method setMinWindowSize on channel desktop_window)

How to solve this problem?

At the moment, there is no way to bring the application window to the front of the screen or activate the window using this plugin. To my knowledge (at least on macOS), calling setWindowSize asynchronously may cause the app to crash due to NSApplication.shared.mainWindow being nil when the window is out of focus.

I've already implemented this for macOS in a separate plugin, but it would be very fitting to add support for all the platforms here in one unified plugin.

I tried to add some code like the following in my main.dart.

  if (!kIsWeb && (Platform.isWindows || Platform.isLinux || Platform.isMacOS)) {
    var size = Size(config.windowWidth, config.windowHeight);
    // disable window resizing
    await DesktopWindow.setWindowSize(size);
    await DesktopWindow.setMinWindowSize(size);
    await DesktopWindow.setMaxWindowSize(size);
  }

However, I got no response on windows 11, I have tested it ok on windows 10. If I comment these pieces of code or change it to use window_size of github.com/google/flutter-desktop-embedding, it works too.

https://user-images.githubusercontent.com/2276718/137615433-75a18ab6-92df-44f8-a3f1-a6a20afbb511.mp4

] Unhandled Exception: MissingPluginException(No implementation found for method setMinWindowSize on channel desktop_window) #0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:154:7) #1 DesktopWindow.setMinWindowSize (package:desktop_window/desktop_window.dart:25:12) #2 main (package:war_simulator_editor/main.dart:33:3)

• Use g_autoptr for fl_value_new_xxx() (g_malloc0()).
• Replace fl_value_lookup() + fl_value_new_string() with fl_value_lookup_string() that takes care of allocating and releasing the string.

In Linux on-screen keyboard enabled, and desktop-window set to fullscreen, the onscreen keyboard open and close automatically when I click a text filed, it's stay in normal screen.

normal mode (without fullscreen) is working without any issue.