/// <summary>
/// Cancels the drag & drop transaction.
/// </summary>
/// <returns>A task that represents the asynchronous operation.</returns>
public async Task CancelTransaction()
{
await transaction.Cancel();
TransactionEnded?.Invoke(this, EventArgs.Empty);
transaction = null;
}
/// <summary>
/// Commits the drag & drop transaction.
/// </summary>
/// <param name="dropZoneName">Dropzone name that is the source of the drag operation.</param>
/// <returns>A task that represents the asynchronous operation.</returns>
public async Task CommitTransaction(string dropZoneName)
{
await transaction.Commit();
await ItemDropped.InvokeAsync(new DraggableDroppedEventArgs <TItem>(transaction.Item, dropZoneName));
TransactionEnded?.Invoke(this, EventArgs.Empty);
transaction = null;
}
private void OnContainerTransactionStarted(object sender, DraggableTransaction <TItem> e)
{
if (GetApplyDropClassesOnDragStarted())
{
var dropResult = ItemCanBeDropped();
dropAllowed = dropResult.Item2;
}
InvokeAsync(StateHasChanged);
}
/// <summary>
/// Starts the new drag & drop transaction for the specified item and dropzone.
/// </summary>
/// <param name="item">Item that is being dragged.</param>
/// <param name="sourceZoneName">Dropzone name that is the source of the drag operation.</param>
/// <param name="commited">Callback that will be called after the successful transaction.</param>
/// <param name="canceled">Callback that will be called when the transaction has been cancelled.</param>
public void StartTransaction(TItem item, string sourceZoneName, Func <Task> commited, Func <Task> canceled)
{
transaction = new DraggableTransaction <TItem>(item, sourceZoneName, commited, canceled);
TransactionStarted?.Invoke(this, transaction);
}
