/// <summary>
/// Starts the asynchronous operation.
/// </summary>
/// <param name="asyncOperationToStart">Async operation context.</param>
public void StartAsyncOperation(IPrintSchemaAsyncOperation asyncOperationToStart)
{
this.asyncOperationContext = asyncOperationToStart;
Visibility = Visibility.Visible;
asyncOperationToStart.Completed += asyncOperation_Completed;
asyncOperationToStart.Start();
}
/// <summary>
/// Commits the input print ticket asynchronously. The completed event handler is expected to close the window.
/// </summary>
/// <param name="validatedTicket"></param>
private void CommitPrintTicketAsync(IPrintSchemaTicket validatedTicket)
{
IPrintSchemaAsyncOperation commitAsyncOperation = printerExtensionEventArgs.Ticket.CommitAsync(validatedTicket);
commitAsyncOperation.Completed += PrintTicketCommitCompleted;
commitAsyncOperation.Start();
}
/// <summary>
/// Starts the asynchronous operation.
/// </summary>
/// <param name="asyncOperationToStart">Async operation context.</param>
public void StartAsyncOperation(IPrintSchemaAsyncOperation asyncOperationToStart)
{
this.asyncOperationContext = asyncOperationToStart;
Visibility = Visibility.Visible;
asyncOperationToStart.Completed += asyncOperation_Completed;
asyncOperationToStart.Start();
}
/// <summary>
/// Button click event handler.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Button_Click(object sender, RoutedEventArgs e)
{
Button clickedButton = (Button)sender;
switch (clickedButton.Name)
{
case "CancelButton":
CancelRequestAndCloseWindow();
break;
case "OkButton":
//
// Validate the print ticket asynchronously. The event handler is invoked when the validation is completed.
//
IPrintSchemaAsyncOperation asyncOperation = displayedPrintTicket.ValidateAsync();
//
// Pop up a modal dialog that prevents the user from changing selections when validation is in progress.
// Since this dialog lives as long as the parent window, it is not mandatory to unregister the delegate for the
// 'Completed' event.
//
ValidationModalDialog.Completed += PrintTicketValidateCompleted; // This operation is idempotent.
ValidationModalDialog.StartAsyncOperation(asyncOperation);
break;
case "VerifyButton":
//
// Force WPF Data binding to refresh the UI. This operation retrieves
// a fresh print capabilities for the print ticket based on the user selections.
//
PropertyChanged(this, new PropertyChangedEventArgs("PrintSchemaHelperSource"));
break;
}
}