In some applications, the users have to enter in forms text values that may be long, hard to remember or easy to misspell.
In some cases, the users are expected to enter text values from list that can be predicted. In these cases it would be helpful if the input field could present visual aids to help the user enter faster the possible values that he may have in mind.
This class provides a means to present that kind of visual help by presenting a list of possible text values that may complete the initial text characters as the users types them.
This way, the forms with text input fields may become more usable as they require that the user types less to get what he wants.