version up

FlowerApp/Platforms/Android/PageExtensions.cs

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+using Google.Android.Material.BottomSheet;
+using Microsoft.Maui.Platform;
+
+namespace Blahblah.FlowerApp;
+
+public static partial class PageExtensions
+{
+    public static BottomSheetDialog ShowBottomSheet(this Page page, IView content, bool dimDismiss = false)
+    {
+        var dialog = new BottomSheetDialog(Platform.CurrentActivity?.Window?.DecorView.FindViewById(Android.Resource.Id.Content)?.Context ?? throw new InvalidOperationException("Context is null"));
+        dialog.SetContentView(content.ToPlatform(page.Handler?.MauiContext ?? throw new Exception("MauiContext is null")));
+        dialog.Behavior.Hideable = dimDismiss;
+        dialog.SetCanceledOnTouchOutside(dimDismiss);
+        dialog.Behavior.FitToContents = true;
+        dialog.Show();
+        return dialog;
+    }
+
+    public static void CloseBottomSheet(this BottomSheetDialog dialog)
+    {
+        dialog.Dismiss();
+    }
+}

FlowerApp/Platforms/iOS/PageExtensions.cs

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+using Microsoft.Maui.Platform;
+using UIKit;
+
+namespace Blahblah.FlowerApp;
+
+public static partial class PageExtensions
+{
+    public static UIViewController ShowBottomSheet(this Page page, IView content, bool dimDismiss = false)
+    {
+        var mauiContext = page.Handler?.MauiContext ?? throw new Exception("MauiContext is null");
+        var viewController = page.ToUIViewController(mauiContext);
+
+        var viewControllerToPresent = content.ToUIViewController(mauiContext);
+        viewControllerToPresent.ModalInPresentation = !dimDismiss;
+
+        var sheet = viewControllerToPresent.SheetPresentationController;
+        if (sheet != null)
+        {
+            sheet.Detents = new[]
+            {
+                UISheetPresentationControllerDetent.CreateLargeDetent()
+            };
+            //sheet.LargestUndimmedDetentIdentifier = dimDismiss ?
+            //    UISheetPresentationControllerDetentIdentifier.Unknown :
+            //    UISheetPresentationControllerDetentIdentifier.Medium;
+            sheet.PrefersScrollingExpandsWhenScrolledToEdge = false;
+            sheet.PrefersEdgeAttachedInCompactHeight = true;
+            sheet.WidthFollowsPreferredContentSizeWhenEdgeAttached = true;
+        }
+
+        viewController.PresentViewController(viewControllerToPresent, true, null);
+        return viewControllerToPresent;
+    }
+
+    public static void CloseBottomSheet(this UIViewController sheet)
+    {
+        sheet.DismissViewController(true, null);
+    }
+}