37.5. EasyDialogs
— Basic Macintosh dialogs¶
The EasyDialogs
module contains some simple dialogs for the Macintosh.
The dialogs get launched in a separate application which appears in the dock and
must be clicked on for the dialogs be displayed. All routines take an optional
resource ID parameter id with which one can override the DLOG
resource used for the dialog, provided that the dialog items correspond (both
type and item number) to those in the default DLOG
resource. See source
code for details.
Note
This module has been removed in Python 3.x.
The EasyDialogs
module defines the following functions:
-
EasyDialogs.
Message
(str[, id[, ok]])¶ Displays a modal dialog with the message text str, which should be at most 255 characters long. The button text defaults to “OK”, but is set to the string argument ok if the latter is supplied. Control is returned when the user clicks the “OK” button.
-
EasyDialogs.
AskString
(prompt[, default[, id[, ok[, cancel]]]])¶ Asks the user to input a string value via a modal dialog. prompt is the prompt message, and the optional default supplies the initial value for the string (otherwise
""
is used). The text of the “OK” and “Cancel” buttons can be changed with the ok and cancel arguments. All strings can be at most 255 bytes long.AskString()
returns the string entered orNone
in case the user cancelled.
-
EasyDialogs.
AskPassword
(prompt[, default[, id[, ok[, cancel]]]])¶ Asks the user to input a string value via a modal dialog. Like
AskString()
, but with the text shown as bullets. The arguments have the same meaning as forAskString()
.
-
EasyDialogs.
AskYesNoCancel
(question[, default[, yes[, no[, cancel[, id]]]]])¶ Presents a dialog with prompt question and three buttons labelled “Yes”, “No”, and “Cancel”. Returns
1
for “Yes”,0
for “No” and-1
for “Cancel”. The value of default (or0
if default is not supplied) is returned when the RETURN key is pressed. The text of the buttons can be changed with the yes, no, and cancel arguments; to prevent a button from appearing, supply""
for the corresponding argument.
-
EasyDialogs.
ProgressBar
([title[, maxval[, label[, id]]]])¶ Displays a modeless progress-bar dialog. This is the constructor for the
ProgressBar
class described below. title is the text string displayed (default “Working…”), maxval is the value at which progress is complete (default0
, indicating that an indeterminate amount of work remains to be done), and label is the text that is displayed above the progress bar itself.
-
EasyDialogs.
GetArgv
([optionlist[ commandlist[, addoldfile[, addnewfile[, addfolder[, id]]]]]])¶ Displays a dialog which aids the user in constructing a command-line argument list. Returns the list in
sys.argv
format, suitable for passing as an argument togetopt.getopt()
. addoldfile, addnewfile, and addfolder are boolean arguments. When nonzero, they enable the user to insert into the command line paths to an existing file, a (possibly) not-yet-existent file, and a folder, respectively. (Note: Option arguments must appear in the command line before file and folder arguments in order to be recognized bygetopt.getopt()
.) Arguments containing spaces can be specified by enclosing them within single or double quotes. ASystemExit
exception is raised if the user presses the “Cancel” button.optionlist is a list that determines a popup menu from which the allowed options are selected. Its items can take one of two forms: optstr or
(optstr, descr)
. When present, descr is a short descriptive string that is displayed in the dialog while this option is selected in the popup menu. The correspondence between optstrs and command-line arguments is:optstr format
Command-line format
x
-x
(short option)x:
orx=
-x
(short option with value)xyz
--xyz
(long option)xyz:
orxyz=
--xyz
(long option with value)commandlist is a list of items of the form cmdstr or
(cmdstr, descr)
, where descr is as above. The cmdstrs will appear in a popup menu. When chosen, the text of cmdstr will be appended to the command line as is, except that a trailing':'
or'='
(if present) will be trimmed off.New in version 2.0.
-
EasyDialogs.
AskFileForOpen
([message] [, typeList] [, defaultLocation] [, defaultOptionFlags] [, location] [, clientName] [, windowTitle] [, actionButtonLabel] [, cancelButtonLabel] [, preferenceKey] [, popupExtension] [, eventProc] [, previewProc] [, filterProc] [, wanted] )¶ Post a dialog asking the user for a file to open, and return the file selected or
None
if the user cancelled. message is a text message to display, typeList is a list of 4-char filetypes allowable, defaultLocation is the pathname,FSSpec
orFSRef
of the folder to show initially, location is the(x, y)
position on the screen where the dialog is shown, actionButtonLabel is a string to show instead of “Open” in the OK button, cancelButtonLabel is a string to show instead of “Cancel” in the cancel button, wanted is the type of value wanted as a return:str
,unicode
,FSSpec
,FSRef
and subtypes thereof are acceptable.For a description of the other arguments please see the Apple Navigation Services documentation and the
EasyDialogs
source code.
-
EasyDialogs.
AskFileForSave
([message] [, savedFileName] [, defaultLocation] [, defaultOptionFlags] [, location] [, clientName] [, windowTitle] [, actionButtonLabel] [, cancelButtonLabel] [, preferenceKey] [, popupExtension] [, fileType] [, fileCreator] [, eventProc] [, wanted] )¶ Post a dialog asking the user for a file to save to, and return the file selected or
None
if the user cancelled. savedFileName is the default for the file name to save to (the return value). SeeAskFileForOpen()
for a description of the other arguments.
-
EasyDialogs.
AskFolder
([message] [, defaultLocation] [, defaultOptionFlags] [, location] [, clientName] [, windowTitle] [, actionButtonLabel] [, cancelButtonLabel] [, preferenceKey] [, popupExtension] [, eventProc] [, filterProc] [, wanted] )¶ Post a dialog asking the user to select a folder, and return the folder selected or
None
if the user cancelled. SeeAskFileForOpen()
for a description of the arguments.
See also
- Navigation Services Reference
Programmer’s reference documentation for the Navigation Services, a part of the Carbon framework.
37.5.1. ProgressBar Objects¶
ProgressBar
objects provide support for modeless progress-bar dialogs.
Both determinate (thermometer style) and indeterminate (barber-pole style)
progress bars are supported. The bar will be determinate if its maximum value
is greater than zero; otherwise it will be indeterminate.
Changed in version 2.2: Support for indeterminate-style progress bars was added.
The dialog is displayed immediately after creation. If the dialog’s “Cancel”
button is pressed, or if Cmd-. or ESC is typed, the dialog window
is hidden and KeyboardInterrupt
is raised (but note that this response
does not occur until the progress bar is next updated, typically via a call to
inc()
or set()
). Otherwise, the bar remains visible until the
ProgressBar
object is discarded.
ProgressBar
objects possess the following attributes and methods:
-
ProgressBar.
curval
¶ The current value (of type integer or long integer) of the progress bar. The normal access methods coerce
curval
between0
andmaxval
. This attribute should not be altered directly.
-
ProgressBar.
maxval
¶ The maximum value (of type integer or long integer) of the progress bar; the progress bar (thermometer style) is full when
curval
equalsmaxval
. Ifmaxval
is0
, the bar will be indeterminate (barber-pole). This attribute should not be altered directly.
-
ProgressBar.
title
([newstr])¶ Sets the text in the title bar of the progress dialog to newstr.
-
ProgressBar.
label
([newstr])¶ Sets the text in the progress box of the progress dialog to newstr.
-
ProgressBar.
set
(value[, max])¶ Sets the progress bar’s
curval
to value, and alsomaxval
to max if the latter is provided. value is first coerced between 0 andmaxval
. The thermometer bar is updated to reflect the changes, including a change from indeterminate to determinate or vice versa.
-
ProgressBar.
inc
([n])¶ Increments the progress bar’s
curval
by n, or by1
if n is not provided. (Note that n may be negative, in which case the effect is a decrement.) The progress bar is updated to reflect the change. If the bar is indeterminate, this causes one “spin” of the barber pole. The resultingcurval
is coerced between 0 andmaxval
if incrementing causes it to fall outside this range.