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216 lines
10 KiB
216 lines
10 KiB
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:mod:`EasyDialogs` --- Basic Macintosh dialogs
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==============================================
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.. module:: EasyDialogs
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:platform: Mac
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:synopsis: Basic Macintosh dialogs.
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:deprecated:
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The :mod:`EasyDialogs` module contains some simple dialogs for the Macintosh.
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The dialogs get launched in a separate application which appears in the dock and
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must be clicked on for the dialogs be displayed. All routines take an optional
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resource ID parameter *id* with which one can override the :const:`DLOG`
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resource used for the dialog, provided that the dialog items correspond (both
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type and item number) to those in the default :const:`DLOG` resource. See source
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code for details.
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.. note::
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This module has been removed in Python 3.x.
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The :mod:`EasyDialogs` module defines the following functions:
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.. function:: Message(str[, id[, ok]])
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Displays a modal dialog with the message text *str*, which should be at most 255
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characters long. The button text defaults to "OK", but is set to the string
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argument *ok* if the latter is supplied. Control is returned when the user
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clicks the "OK" button.
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.. function:: AskString(prompt[, default[, id[, ok[, cancel]]]])
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Asks the user to input a string value via a modal dialog. *prompt* is the prompt
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message, and the optional *default* supplies the initial value for the string
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(otherwise ``""`` is used). The text of the "OK" and "Cancel" buttons can be
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changed with the *ok* and *cancel* arguments. All strings can be at most 255
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bytes long. :func:`AskString` returns the string entered or :const:`None` in
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case the user cancelled.
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.. function:: AskPassword(prompt[, default[, id[, ok[, cancel]]]])
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Asks the user to input a string value via a modal dialog. Like
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:func:`AskString`, but with the text shown as bullets. The arguments have the
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same meaning as for :func:`AskString`.
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.. function:: AskYesNoCancel(question[, default[, yes[, no[, cancel[, id]]]]])
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Presents a dialog with prompt *question* and three buttons labelled "Yes", "No",
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and "Cancel". Returns ``1`` for "Yes", ``0`` for "No" and ``-1`` for "Cancel".
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The value of *default* (or ``0`` if *default* is not supplied) is returned when
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the :kbd:`RETURN` key is pressed. The text of the buttons can be changed with
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the *yes*, *no*, and *cancel* arguments; to prevent a button from appearing,
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supply ``""`` for the corresponding argument.
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.. function:: ProgressBar([title[, maxval[, label[, id]]]])
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Displays a modeless progress-bar dialog. This is the constructor for the
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:class:`ProgressBar` class described below. *title* is the text string displayed
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(default "Working..."), *maxval* is the value at which progress is complete
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(default ``0``, indicating that an indeterminate amount of work remains to be
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done), and *label* is the text that is displayed above the progress bar itself.
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.. function:: GetArgv([optionlist[ commandlist[, addoldfile[, addnewfile[, addfolder[, id]]]]]])
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Displays a dialog which aids the user in constructing a command-line argument
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list. Returns the list in ``sys.argv`` format, suitable for passing as an
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argument to :func:`getopt.getopt`. *addoldfile*, *addnewfile*, and *addfolder*
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are boolean arguments. When nonzero, they enable the user to insert into the
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command line paths to an existing file, a (possibly) not-yet-existent file, and
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a folder, respectively. (Note: Option arguments must appear in the command line
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before file and folder arguments in order to be recognized by
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:func:`getopt.getopt`.) Arguments containing spaces can be specified by
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enclosing them within single or double quotes. A :exc:`SystemExit` exception is
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raised if the user presses the "Cancel" button.
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*optionlist* is a list that determines a popup menu from which the allowed
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options are selected. Its items can take one of two forms: *optstr* or
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``(optstr, descr)``. When present, *descr* is a short descriptive string that
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is displayed in the dialog while this option is selected in the popup menu. The
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correspondence between *optstr*\s and command-line arguments is:
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+----------------------+------------------------------------------+
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| *optstr* format | Command-line format |
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+======================+==========================================+
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| ``x`` | :option:`!-x` (short option) |
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+----------------------+------------------------------------------+
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| ``x:`` or ``x=`` | :option:`!-x` (short option with value) |
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+----------------------+------------------------------------------+
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| ``xyz`` | :option:`!--xyz` (long option) |
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+----------------------+------------------------------------------+
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| ``xyz:`` or ``xyz=`` | :option:`!--xyz` (long option with value)|
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+----------------------+------------------------------------------+
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*commandlist* is a list of items of the form *cmdstr* or ``(cmdstr, descr)``,
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where *descr* is as above. The *cmdstr*\ s will appear in a popup menu. When
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chosen, the text of *cmdstr* will be appended to the command line as is, except
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that a trailing ``':'`` or ``'='`` (if present) will be trimmed off.
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.. versionadded:: 2.0
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.. function:: AskFileForOpen( [message] [, typeList] [, defaultLocation] [, defaultOptionFlags] [, location] [, clientName] [, windowTitle] [, actionButtonLabel] [, cancelButtonLabel] [, preferenceKey] [, popupExtension] [, eventProc] [, previewProc] [, filterProc] [, wanted] )
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Post a dialog asking the user for a file to open, and return the file selected
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or :const:`None` if the user cancelled. *message* is a text message to display,
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*typeList* is a list of 4-char filetypes allowable, *defaultLocation* is the
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pathname, :class:`FSSpec` or :class:`FSRef` of the folder to show initially,
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*location* is the ``(x, y)`` position on the screen where the dialog is shown,
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*actionButtonLabel* is a string to show instead of "Open" in the OK button,
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*cancelButtonLabel* is a string to show instead of "Cancel" in the cancel
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button, *wanted* is the type of value wanted as a return: :class:`str`,
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:class:`unicode`, :class:`FSSpec`, :class:`FSRef` and subtypes thereof are
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acceptable.
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.. index:: single: Navigation Services
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For a description of the other arguments please see the Apple Navigation
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Services documentation and the :mod:`EasyDialogs` source code.
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.. function:: AskFileForSave( [message] [, savedFileName] [, defaultLocation] [, defaultOptionFlags] [, location] [, clientName] [, windowTitle] [, actionButtonLabel] [, cancelButtonLabel] [, preferenceKey] [, popupExtension] [, fileType] [, fileCreator] [, eventProc] [, wanted] )
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Post a dialog asking the user for a file to save to, and return the file
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selected or :const:`None` if the user cancelled. *savedFileName* is the default
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for the file name to save to (the return value). See :func:`AskFileForOpen` for
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a description of the other arguments.
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.. function:: AskFolder( [message] [, defaultLocation] [, defaultOptionFlags] [, location] [, clientName] [, windowTitle] [, actionButtonLabel] [, cancelButtonLabel] [, preferenceKey] [, popupExtension] [, eventProc] [, filterProc] [, wanted] )
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Post a dialog asking the user to select a folder, and return the folder selected
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or :const:`None` if the user cancelled. See :func:`AskFileForOpen` for a
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description of the arguments.
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.. seealso::
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`Navigation Services Reference <http://developer.apple.com/legacy/mac/library/#documentation/Carbon/Conceptual/NavServicesIntro/ns_intro_carb/ns_into_carb.html>`_
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Programmer's reference documentation for the Navigation Services, a part of the
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Carbon framework.
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.. _progressbar-objects:
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ProgressBar Objects
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-------------------
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:class:`ProgressBar` objects provide support for modeless progress-bar dialogs.
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Both determinate (thermometer style) and indeterminate (barber-pole style)
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progress bars are supported. The bar will be determinate if its maximum value
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is greater than zero; otherwise it will be indeterminate.
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.. versionchanged:: 2.2
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Support for indeterminate-style progress bars was added.
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The dialog is displayed immediately after creation. If the dialog's "Cancel"
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button is pressed, or if :kbd:`Cmd-.` or :kbd:`ESC` is typed, the dialog window
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is hidden and :exc:`KeyboardInterrupt` is raised (but note that this response
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does not occur until the progress bar is next updated, typically via a call to
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:meth:`inc` or :meth:`set`). Otherwise, the bar remains visible until the
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:class:`ProgressBar` object is discarded.
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:class:`ProgressBar` objects possess the following attributes and methods:
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.. attribute:: ProgressBar.curval
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The current value (of type integer or long integer) of the progress bar. The
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normal access methods coerce :attr:`curval` between ``0`` and :attr:`maxval`.
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This attribute should not be altered directly.
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.. attribute:: ProgressBar.maxval
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The maximum value (of type integer or long integer) of the progress bar; the
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progress bar (thermometer style) is full when :attr:`curval` equals
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:attr:`maxval`. If :attr:`maxval` is ``0``, the bar will be indeterminate
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(barber-pole). This attribute should not be altered directly.
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.. method:: ProgressBar.title([newstr])
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Sets the text in the title bar of the progress dialog to *newstr*.
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.. method:: ProgressBar.label([newstr])
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Sets the text in the progress box of the progress dialog to *newstr*.
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.. method:: ProgressBar.set(value[, max])
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Sets the progress bar's :attr:`curval` to *value*, and also :attr:`maxval` to
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*max* if the latter is provided. *value* is first coerced between 0 and
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:attr:`maxval`. The thermometer bar is updated to reflect the changes,
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including a change from indeterminate to determinate or vice versa.
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.. method:: ProgressBar.inc([n])
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Increments the progress bar's :attr:`curval` by *n*, or by ``1`` if *n* is not
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provided. (Note that *n* may be negative, in which case the effect is a
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decrement.) The progress bar is updated to reflect the change. If the bar is
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indeterminate, this causes one "spin" of the barber pole. The resulting
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:attr:`curval` is coerced between 0 and :attr:`maxval` if incrementing causes it
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to fall outside this range.
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