Mac cursor on button

Question

Hi,

In window I did this code and is not working on MAC.

How do i fix it ?

Thanks,

        Microsoft.Maui.Handlers.ButtonHandler.Mapper.AppendToMapping("Custom", (handler, view) =>

        {

#if WINDOWS

using Microsoft.UI.Input;

using Microsoft.UI.Xaml;

#endif

using System.Reflection;

namespace GssdDesktopClient.Maui.Extensions

{

public static class ElementExtension

{

#if WINDOWS

    public static void ChangeCursor(this UIElement uiElement, InputCursor cursor)

    {

        Type type = typeof(UIElement);

        type.InvokeMember("ProtectedCursor", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.SetProperty | BindingFlags.Instance, null, uiElement, new object[] { cursor });

    }

#endif

}

}

#if WINDOWS

        Button button = handler.VirtualView as Button;

        button.HandlerChanged    += (sender, args) =>

        {

            Microsoft.UI.Xaml.Controls.Button btn = (Microsoft.UI.Xaml.Controls.Button)handler.PlatformView;

            btn.Loaded += (s2, e2) =>

            {

                MainThread.BeginInvokeOnMainThread(() =>

                {

                    btn.ChangeCursor(Microsoft.UI.Input.InputSystemCursor.Create(Microsoft.UI.Input.InputSystemCursorShape.Hand));

                });

            };

        };

#endif

        });

        Microsoft.Maui.Handlers.ImageButtonHandler.Mapper.AppendToMapping("Custom", (handler, view) =>

        {

#if WINDOWS

        ImageButton button = handler.VirtualView as ImageButton;

        button.HandlerChanged    += (sender, args) =>

        {

            Microsoft.UI.Xaml.Controls.Button btn = (Microsoft.UI.Xaml.Controls.Button)handler.PlatformView;

            btn.Loaded += (s2, e2) =>

            {

                MainThread.BeginInvokeOnMainThread(() =>

                {

                    btn.ChangeCursor(Microsoft.UI.Input.InputSystemCursor.Create(Microsoft.UI.Input.InputSystemCursorShape.Hand));

                });

            };

        };

#endif

        });

Answer 1

Hello,

The solution in the article is correct, using behavior is a good practice. If you don't want to use behaviors, but instead want to use handlers to make every button on MacCatalyst have this functionality, please refer to the following code:

Handler:

(You can put the following code in MauiProgram.cs
After this line of code #if DEBUG     builder.Logging.AddDebug(); #endif, before this line of code });    return builder.Build();)

Microsoft.Maui.Handlers.ButtonHandler.Mapper.AppendToMapping("custom", (handler, view) =>
        {
#if MACCATALYST
            UIButton uIButton = handler.PlatformView as UIButton;// get the platformview 
 
            if (uIButton.GestureRecognizers is not null)
            {
                foreach (var recognizer in uIButton.GestureRecognizers.OfType<PointerUIHoverGestureRecognizer>())
                {
                    uIButton.RemoveGestureRecognizer(recognizer);
                }
            }
 // add the hovergesture (Native maccatalyst API)
            uIButton.AddGestureRecognizer(new PointerUIHoverGestureRecognizer(r =>
            {
                switch (r.State)
                {
                    case UIGestureRecognizerState.Began:
                        NSCursor.OpenHandCursor.Set();
                        break;// add the hand
                    case UIGestureRecognizerState.Ended:
                        NSCursor.ArrowCursor.Set();
                        break;
                }
            }));
 
 
#endif

Gesture Class

(Put the following code after MauiProgram class, like this format

public static class MauiProgram...
#if MACCATALYST
public class PointerUIHoverGestureRecognizer...
#endif 

)

#if MACCATALYST
public class PointerUIHoverGestureRecognizer : UIHoverGestureRecognizer
{

public PointerUIHoverGestureRecognizer(Action<UIHoverGestureRecognizer> action) : base(action)
{
}
}
#endif

Namespaces

#if MACCATALYST
using AppKit;
using UIKit;
#endif

Best Regards,

Wenyan Zhang

---

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Answer 2

See this article

https://vladislavantonyuk.github.io/articles/Setting-a-cursor-for-.NET-MAUI-VisualElement/