如何以编程方式移动和最小化 Maui windows 应用程序

Question

I have a maui app with blazor and I'm creating a custom titlebar.

I about to close the maui app, using on blazor Application.Current.Quit();

Now how can i minimize and move maui app

My code blazor

private void MoveWindow()
{
    
}

private void MinimizeWindow()
{
        
}


private void CloseWindow() {
    Application.Current.Quit();
}

Answer 1

Maui already has a function to minimize the application.

Use the following in your blazor:

private void MinimizeWindow()
{
#if WINDOWS
    var Window = App.Current.Windows.First();
    var nativeWindow = Window.Handler.PlatformView;
    IntPtr windowHandle = WinRT.Interop.WindowNative.GetWindowHandle(nativeWindow);
    WindowId WindowId = Win32Interop.GetWindowIdFromWindow(windowHandle);
    AppWindow appWindow = AppWindow.GetFromWindowId(WindowId);

    var p = appWindow.Presenter as OverlappedPresenter;

    p.Minimize();
#endif
}

Answer 2

You need to call native code for that. Add a reference to PInvoke.User32 package:

<PackageReference Include="PInvoke.User32" Version="0.7.104" Condition="$([MSBuild]::IsOSPlatform('windows'))"/>

Minimize

As an example upon a button click we minimize the window:

void MinimizeWindow(object sender, EventArgs e)
{
#if WINDOWS
            var mauiWindow = App.Current.Windows.First();
            var nativeWindow = mauiWindow.Handler.PlatformView;
            IntPtr windowHandle = WinRT.Interop.WindowNative.GetWindowHandle(nativeWindow);

            PInvoke.User32.ShowWindow(windowHandle, PInvoke.User32.WindowShowStyle.SW_MINIMIZE);
#endif
}

Move

void MoveWindow(object sender, EventArgs e)
{
#if WINDOWS
            var mauiWindow = App.Current.Windows.First();
            var nativeWindow = mauiWindow.Handler.PlatformView;
            IntPtr windowHandle = WinRT.Interop.WindowNative.GetWindowHandle(nativeWindow);
            PInvoke.RECT rect;

            PInvoke.User32.GetWindowRect(windowHandle, out rect);
            (var width, var height) = GetWinSize(rect);

            PInvoke.User32.MoveWindow(windowHandle, 50, 0, width, height, true);

#endif
}

(int width, int height) GetWinSize(PInvoke.RECT rect) =>
            (rect.right - rect.left, rect.bottom - rect.top);

It's possible to resize the window with MoveWindow() , but since the aim in the question is to move the window only, then we supply the values of the current window's width and height as parameters.

Ps: Unfortunately I didn't find a simpler solution to get the window dimensions.