The OnItemRemoved property in the SelectionSystem class is an event handler that is triggered whenever an item is removed from the selection. It is a public instance property of type System.Action<System.Object>, allowing you to assign a delegate that will be called with the removed item as its parameter.
To use the OnItemRemoved property, you can assign a method that matches the Action<Object> delegate signature. This method will be invoked whenever an item is removed from the selection system.
For example, you can use it to perform cleanup operations or update the UI when an item is removed.
// Example of using the OnItemRemoved property
// Create an instance of the SelectionSystem
SelectionSystem selectionSystem = new SelectionSystem();
// Define a method to handle the item removal
void HandleItemRemoved(object removedItem)
{
// Perform actions when an item is removed
Console.WriteLine($"Item removed: {removedItem}");
}
// Assign the method to the OnItemRemoved event
selectionSystem.OnItemRemoved = HandleItemRemoved;
// Add and remove items to trigger the event
selectionSystem.Add("Item1");
selectionSystem.Remove("Item1");
// Output: Item removed: Item1