Net maui windows platform how to capture the maximized second click event ?

Question

Net maui windows platform how to capture the maximized second click event ? Thanks

Answer 1

Hello,

If you click the maximized button for the second time. The state is Restored, you can judge the state by adding else if(res == OverlappedPresenterState.Restored) like following code, then send the message as well.

#if WINDOWS
               builder.ConfigureLifecycleEvents(events =>
               {
                events.AddWindows(windowsLifecycleBuilder =>
                {
                    windowsLifecycleBuilder.OnWindowCreated(window =>
                    {
                        window.ExtendsContentIntoTitleBar = false;
 
                        IntPtr handle = WinRT.Interop.WindowNative.GetWindowHandle(window);
 
                        var id = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(handle);
 
                        var appWindow = Microsoft.UI.Windowing.AppWindow.GetFromWindowId(id);                       
 
                        var p = appWindow.Presenter as OverlappedPresenter;
 
                        var titleBar = appWindow.TitleBar;
 
                         //detailpage events
 
                          appWindow.Changed += (sender, args) => {
 
                    if(args.DidSizeChange)
 
                    {
 
                        OverlappedPresenterState res = p.State;
 
                        if (res == OverlappedPresenterState.Maximized)
 
                        {
// this will be invoked when maxmized button clicked
 
WeakReferenceMessenger.Default.Send(new DetailPageStatus("Maximized"));
 
 
                        }
 
                        else if (res == OverlappedPresenterState.Minimized)
 
                        {
// this will be invoked when Minimized button clicked
 
WeakReferenceMessenger.Default.Send(new DetailPageStatus("Minimized"));
 
 
                        }
 
                        else if(res == OverlappedPresenterState.Restored) {
 
// this will be invoked when maxmized button clicked second time, the state is restored.

WeakReferenceMessenger.Default.Send(new DetailPageStatus("Restored"));
 
                                  }
 
                              }
 
                };
 
                    });
 
                                            
 
               });
 
 
    });
#endif

In you detailedpage, you can get result of the message and handle the Restored state.

WeakReferenceMessenger.Default.Register<DetailPageStatus>(this, (r, m) =>
{
     var res = m.Value;
     if (res.Equals("Maximized"))
     {
         if (res != null)
         {
             gridDetails.IsVisible = true;
         }
         else
         {
             gridDetails.IsVisible = false;
         }
     }else if (res.Equals("Restored"))
     {
         // this will be invoked when maxmized button clicked for the second time, the state is restored.
 
     }
 
});

Best Regards,

Leon Lu

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Answer 2

ok,you may see it

using Microsoft.Maui.Controls;
using Microsoft.Maui.LifecycleEvents;
public partial class MainPage : ContentPage
{
    private bool isFirstMaximize = true;
    public MainPage()
    {
        InitializeComponent();
        Microsoft.Maui.Handlers.WindowHandler.Mapper.AppendToMapping(nameof(IWindow), (handler, view) =>
        {
            if (handler?.PlatformView is Microsoft.UI.Xaml.Window platformWindow)
            {
                platformWindow.StateChanged += (sender, args) =>
                {
                    if (platformWindow.WindowState == Microsoft.UI.Windowing.WindowState.Maximized)
                    {
                        if (isFirstMaximize)
                        {
                            isFirstMaximize = false;
                        }
                        else
                        {
                            // Handle the second click when the window is maximized
                            OnSecondMaximizeClick();
                        }
                    }
                    else if (platformWindow.WindowState == Microsoft.UI.Windowing.WindowState.Normal)
                    {
                        isFirstMaximize = true; // Reset when the window is restored to normal
                    }
                };
            }
        });
    }
    private void OnSecondMaximizeClick()
    {
        // Your logic for handling the second maximize click
    }
}

1. The StateChanged event is triggered whenever the window state changes (e.g., from normal to maximized or minimized).
2. We track whether the window was maximized previously using the isFirstMaximize flag. If the window is already maximized and the event triggers again, it means a second click occurred while the window is maximized.