textF :: F (TextRequest String) (InputMsg (Int, String))
textFis the basic fudget for displaying plain text on one or several lines.
InputMsgmessages containing pairs of line numbers (starting at 0) and contents of a line when the user clicks on it. Double-clicking indicates completed input (see inputDoneSP for an explanation on completed input).
textF: labelF, displayF, moreF, pickListF, ...