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55 lines
2.3 KiB
TeX
55 lines
2.3 KiB
TeX
\section{Standard Module \sectcode{EasyDialogs}}
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\label{module-EasyDialogs}
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\stmodindex{EasyDialogs}
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The \code{EasyDialogs} module contains some simple dialogs for
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the Macintosh, modelled after the \code{stdwin} dialogs with similar
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names. All routines have an optional parameter \var{id} with which you
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can override the DLOG resource used for the dialog, as long as the
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item numbers correspond. See the source for details.
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The \code{EasyDialogs} module defines the following functions:
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\setindexsubitem{(in module EasyDialogs)}
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\begin{funcdesc}{Message}{str}
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A modal dialog with the message text \var{str}, which should be at
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most 255 characters long, is displayed. Control is returned when the
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user clicks ``OK''.
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\end{funcdesc}
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\begin{funcdesc}{AskString}{prompt\optional{, default}}
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Ask the user to input a string value, in a modal dialog. \var{Prompt}
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is the promt message, the optional \var{default} arg is the initial
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value for the string. All strings can be at most 255 bytes
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long. \var{AskString} returns the string entered or \code{None} in
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case the user cancelled.
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\end{funcdesc}
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\begin{funcdesc}{AskYesNoCancel}{question\optional{, default}}
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Present a dialog with text \var{question} and three buttons labelled
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``yes'', ``no'' and ``cancel''. Return \code{1} for yes, \code{0} for
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no and \code{-1} for cancel. The default return value chosen by
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hitting return is \code{0}. This can be changed with the optional
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\var{default} argument.
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\end{funcdesc}
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\begin{funcdesc}{ProgressBar}{\optional{label, maxval}}
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Display a modeless progress dialog with a thermometer bar. \var{Label}
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is the textstring displayed (default ``Working...''), \var{maxval} is
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the value at which progress is complete (default 100). The returned
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object has one method, \code{set(value)}, which sets the value of the
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progress bar. The bar remains visible until the object returned is
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discarded.
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The progress bar has a ``cancel'' button, but it is currently
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non-functional.
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\end{funcdesc}
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Note that \code{EasyDialogs} does not currently use the notification
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manager. This means that displaying dialogs while the program is in
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the background will lead to unexpected results and possibly
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crashes. Also, all dialogs are modeless and hence expect to be at the
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top of the stacking order. This is true when the dialogs are created,
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but windows that pop-up later (like a console window) may also result
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in crashes.
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