protected virtual void OnBeforeExecute(BeforeExecuteEventArgs e)
{
if(BeforeExecute != null)
BeforeExecute(this, e);
}
public void Execute(ICommand command)
{
BeforeExecuteEventArgs args = new BeforeExecuteEventArgs() { Cancel = false, Command = command };
OnBeforeExecute(args);
if(!args.Cancel)
{
command.Execute();
if(command is IUndoableCommand)
{
commandHistory.Push((IUndoableCommand)command);
undoneCommands.Clear();
OnCommandHistoryChanged();
}
}
}