Util.Messages

This module contains the hooks for displaying messages to the user (errors, alerts, warnings and the like) and getting yes/no responses.

The idea is that these are by default textual, and go via stdin, stdout and stderr . However if the DialogWin function useHTk is invoked, windows will pop up.

Documentation

alertMess :: String -> IO ()

Display an alert

errorMess :: String -> IO ()

Display an error

warningMess :: String -> IO ()

Display a warning message

confirmMess :: String -> IO Bool

Confirm something with the user.

messageMess :: String -> IO ()

Display some informational message.

htkPresent :: IO Bool

If True, indicates that the flag corresponding to a graphical mode has been set. This is used occasionally for deciding whether to ask the user something on stdout, stdin or via a window.

textQuery :: String -> IO String

queries the user on stdout getting the answer from stdin. Leading and trailing spaces are trimmed from the result.

errorMess2 :: String -> IO ()

Display a series of one-line messages, separated by newline characters, attempting to combine them together and eliminate duplicates as much as possible. If other identical messages come in while the error message is being delayed, we throw them away.

data MessFns

Constructors

MessFns

Fields

• alertFn :: String -> IO ()
• errorFn :: String -> IO ()
• warningFn :: String -> IO ()
• confirmFn :: String -> IO Bool
• messageFn :: String -> IO ()
• htkPres :: Bool

setMessFns :: MessFns -> IO ()