Incorrect Window.Y and Window.Height values when closing a maximized window

[igristov]

Description

On the Windows platform, if the application window is maximized, the main window Y and Height values are shifted by 8 in the Window_Destroying(). For a non-maximized window, values are correct.

public partial class App : Application
{
    void Window_Destroying(object sender, EventArgs e)
    {
        var window = (Window)sender!;
        // window.X:      always correct
        // window.Width:  always correct
        // window.Y:      incorrect (lower by 8) when closing a maximized window, correct otherwise
        // window.Height: incorrect (higher by 8) when closing a maximized window, correct otherwise
    }
}

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

9.0.14 SR1.4

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

Windows

Affected platform versions

Windows SDK 10.0.19041.0

Did you find any workaround?

Correct values:
y = window.Y + 8; height = window.Height - 8;

Relevant log output

[tj-devel709]

For testing in the maui sandbox, code snippet below. It looks like this is still happening in 9.0.60 - at least the window.Y is -7 when in fullscreen.

namespace Maui.Controls.Sample;

public partial class App : Application
{
	public App()
	{
		InitializeComponent();
	}

	void Window_Destroying(object? sender, EventArgs e)
    {
        var window = (Window)sender!;
        // window.X:      always correct
        // window.Width:  always correct
        // window.Y:      incorrect (lower by 8) when closing a maximized window, correct otherwise
        // window.Height: incorrect (higher by 8) when closing a maximized window, correct otherwise
    }

	protected override Window CreateWindow(IActivationState? activationState)
	{
		// To test shell scenarios, change this to true
		bool useShell = false;

		if (!useShell)
		{
			var window = new Window(new NavigationPage(new MainPage()));
			window.Destroying += Window_Destroying;
			return window;
		}
		else
		{
			var window = new Window(new SandboxShell());
			window.Destroying += Window_Destroying;
			return window;
		}
	}
}

[prakashKannanSf3972]

This issue has been reproduced with .NET MAUI version (9.0.60) using Visual Studio 2022 (17.14.0) on the Windows platform.

Windows.mp4