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messagebox.py

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# tk common message boxes

#

# this module provides an interface to the native message boxes

# available in Tk 4.2 and newer.

#

# written by Fredrik Lundh, May 1997

#

#

# options (all have default values):

#

# - default: which button to make default (one of the reply codes)

#

# - icon: which icon to display (see below)

#

# - message: the message to display

#

# - parent: which window to place the dialog on top of

#

# - title: dialog title

#

# - type: dialog type; that is, which buttons to display (see below)

#

from tkinter.commondialog import Dialog

#

# constants

# icons

ERROR = "error"

INFO = "info"

QUESTION = "question"

WARNING = "warning"

# types

ABORTRETRYIGNORE = "abortretryignore"

OK = "ok"

OKCANCEL = "okcancel"

RETRYCANCEL = "retrycancel"

YESNO = "yesno"

YESNOCANCEL = "yesnocancel"

# replies

ABORT = "abort"

RETRY = "retry"

IGNORE = "ignore"

OK = "ok"

CANCEL = "cancel"

YES = "yes"

NO = "no"

#

# message dialog class

class Message(Dialog):

"A message box"

command = "tk_messageBox"

#

# convenience stuff

# Rename _icon and _type options to allow overriding them in options

def _show(title=None, message=None, _icon=None, _type=None, **options):

if _icon and "icon" not in options: options["icon"] = _icon

if _type and "type" not in options: options["type"] = _type

if title: options["title"] = title

if message: options["message"] = message

res = Message(**options).show()

# In some Tcl installations, yes/no is converted into a boolean.

if isinstance(res, bool):

if res:

return YES

return NO

# In others we get a Tcl_Obj.

return str(res)

def showinfo(title=None, message=None, **options):

"Show an info message"

return _show(title, message, INFO, OK, **options)

def showwarning(title=None, message=None, **options):

"Show a warning message"

return _show(title, message, WARNING, OK, **options)

def showerror(title=None, message=None, **options):

"Show an error message"

return _show(title, message, ERROR, OK, **options)

def askquestion(title=None, message=None, **options):

"Ask a question"

return _show(title, message, QUESTION, YESNO, **options)

def askokcancel(title=None, message=None, **options):

"Ask if operation should proceed; return true if the answer is ok"

s = _show(title, message, QUESTION, OKCANCEL, **options)

return s == OK

def askyesno(title=None, message=None, **options):

"Ask a question; return true if the answer is yes"

s = _show(title, message, QUESTION, YESNO, **options)

return s == YES

def askyesnocancel(title=None, message=None, **options):

"Ask a question; return true if the answer is yes, None if cancelled."

s = _show(title, message, QUESTION, YESNOCANCEL, **options)

# s might be a Tcl index object, so convert it to a string

s = str(s)

if s == CANCEL:

return None

return s == YES

def askretrycancel(title=None, message=None, **options):

"Ask if operation should be retried; return true if the answer is yes"

s = _show(title, message, WARNING, RETRYCANCEL, **options)

return s == RETRY

# --------------------------------------------------------------------

# test stuff

if __name__ == "__main__":

print("info", showinfo("Spam", "Egg Information"))

print("warning", showwarning("Spam", "Egg Warning"))

print("error", showerror("Spam", "Egg Alert"))

print("question", askquestion("Spam", "Question?"))

print("proceed", askokcancel("Spam", "Proceed?"))

print("yes/no", askyesno("Spam", "Got it?"))

print("yes/no/cancel", askyesnocancel("Spam", "Want it?"))

print("try again", askretrycancel("Spam", "Try again?"))