[Catalyst] Click-Dragging Behavior in CollectionView (#29616)

* CollectionView drag changes on Mac

* Mac drag changes

Author: Tamilarasan-Paranthaman

src/Controls/src/Core/Handlers/Items/iOS/ReorderableItemsViewController.cs

@@ -14,6 +14,10 @@ public class ReorderableItemsViewController<TItemsView> : GroupableItemsViewCont
 		bool _disposed;
 		UILongPressGestureRecognizer _longPressGestureRecognizer;
 
+#if MACCATALYST
+		const double defaultMacCatalystPressDuration = 0.1;
+#endif
+
 		public ReorderableItemsViewController(TItemsView reorderableItemsView, ItemsViewLayout layout)
 			: base(reorderableItemsView, layout)
 		{
@@ -162,6 +166,12 @@ public void UpdateCanReorderItems()
 				if (_longPressGestureRecognizer == null)
 				{
 					_longPressGestureRecognizer = new UILongPressGestureRecognizer(HandleLongPress);
+#if MACCATALYST
+					// On Mac Catalyst, we disable the default drag interaction and instead handle dragging using a long press gesture recognizer.
+					// Since a long press typically takes more time to trigger than the system's default drag interaction, 
+					// we reduce the minimum press duration to 0.1 seconds to better match the previous behavior.
+					_longPressGestureRecognizer.MinimumPressDuration = defaultMacCatalystPressDuration;
+#endif
 					CollectionView.AddGestureRecognizer(_longPressGestureRecognizer);
 				}
 			}

src/Controls/src/Core/Handlers/Items2/iOS/ReorderableItemsViewController2.cs

@@ -14,6 +14,10 @@ public class ReorderableItemsViewController2<TItemsView> : GroupableItemsViewCon
 		bool _disposed;
 		UILongPressGestureRecognizer _longPressGestureRecognizer;
 
+#if MACCATALYST
+		const double defaultMacCatalystPressDuration = 0.1;
+#endif
+
 		public ReorderableItemsViewController2(TItemsView reorderableItemsView, UICollectionViewLayout layout)
 			: base(reorderableItemsView, layout)
 		{
@@ -162,6 +166,12 @@ public void UpdateCanReorderItems()
 				if (_longPressGestureRecognizer == null)
 				{
 					_longPressGestureRecognizer = new UILongPressGestureRecognizer(HandleLongPress);
+#if MACCATALYST
+					// On Mac Catalyst, we disable the default drag interaction and instead handle dragging using a long press gesture recognizer.
+					// Since a long press typically takes more time to trigger than the system's default drag interaction, 
+					// we reduce the minimum press duration to 0.1 seconds to better match the previous behavior.
+					_longPressGestureRecognizer.MinimumPressDuration = defaultMacCatalystPressDuration;
+#endif
 					CollectionView.AddGestureRecognizer(_longPressGestureRecognizer);
 				}
 			}