Creating a Message

message msgString

message :: String
        -> Component (Message, DisplayHandle)

creates an instance of Message displaying msgString list of characters, breaking it up into lines along word boundaries if the string does not fit onto one line. By default, message tries to allocate a bounding box for the text with a width to height ratio of 3/2. If you want to configure this or any other option, use either mkMessage or See section Customising Messages.

mkMessage msgString width aspect just anchor

mkMessage :: String 
          -> Int
	  -> Int
	  -> Justification
	  -> CompassDirection
	  -> Component (Message, DisplayHandle)

A fully configurable interface to the Message abstraction. The msgString is exampleted and displayed with the help of the following parameters:

• width - the natural width to use. Since we only break the message text along word boundaries, the actual width will be the maximum between the natural width and the width of the longest word.
• aspect - the aspect ratio between width and height, expressed in Tk style as 100*x/y. The default is 150.
• just - how to justify the message lines, i.e., left, centre or right.
• anchor - where to place the text within the message bounding box, e.g., SouthWest anchors the bottom left of the message lines in the lower lefthand corner of the bounding box, NorthEast anchors the top righthand corner of the message lines in the top right of the message bounding box.