lib-python.2.7.lib-tk.tkSimpleDialog.py Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jython Show documentation
Show all versions of jython Show documentation
Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
#
# An Introduction to Tkinter
# tkSimpleDialog.py
#
# Copyright (c) 1997 by Fredrik Lundh
#
# [email protected]
# http://www.pythonware.com
#
# --------------------------------------------------------------------
# dialog base class
'''Dialog boxes
This module handles dialog boxes. It contains the following
public symbols:
Dialog -- a base class for dialogs
askinteger -- get an integer from the user
askfloat -- get a float from the user
askstring -- get a string from the user
'''
from Tkinter import *
class Dialog(Toplevel):
'''Class to open dialogs.
This class is intended as a base class for custom dialogs
'''
def __init__(self, parent, title = None):
'''Initialize a dialog.
Arguments:
parent -- a parent window (the application window)
title -- the dialog title
'''
Toplevel.__init__(self, parent)
self.withdraw() # remain invisible for now
# If the master is not viewable, don't
# make the child transient, or else it
# would be opened withdrawn
if parent.winfo_viewable():
self.transient(parent)
if title:
self.title(title)
self.parent = parent
self.result = None
body = Frame(self)
self.initial_focus = self.body(body)
body.pack(padx=5, pady=5)
self.buttonbox()
if not self.initial_focus:
self.initial_focus = self
self.protocol("WM_DELETE_WINDOW", self.cancel)
if self.parent is not None:
self.geometry("+%d+%d" % (parent.winfo_rootx()+50,
parent.winfo_rooty()+50))
self.deiconify() # become visibile now
self.initial_focus.focus_set()
# wait for window to appear on screen before calling grab_set
self.wait_visibility()
self.grab_set()
self.wait_window(self)
def destroy(self):
'''Destroy the window'''
self.initial_focus = None
Toplevel.destroy(self)
#
# construction hooks
def body(self, master):
'''create dialog body.
return widget that should have initial focus.
This method should be overridden, and is called
by the __init__ method.
'''
pass
def buttonbox(self):
'''add standard button box.
override if you do not want the standard buttons
'''
box = Frame(self)
w = Button(box, text="OK", width=10, command=self.ok, default=ACTIVE)
w.pack(side=LEFT, padx=5, pady=5)
w = Button(box, text="Cancel", width=10, command=self.cancel)
w.pack(side=LEFT, padx=5, pady=5)
self.bind("", self.ok)
self.bind("", self.cancel)
box.pack()
#
# standard button semantics
def ok(self, event=None):
if not self.validate():
self.initial_focus.focus_set() # put focus back
return
self.withdraw()
self.update_idletasks()
try:
self.apply()
finally:
self.cancel()
def cancel(self, event=None):
# put focus back to the parent window
if self.parent is not None:
self.parent.focus_set()
self.destroy()
#
# command hooks
def validate(self):
'''validate the data
This method is called automatically to validate the data before the
dialog is destroyed. By default, it always validates OK.
'''
return 1 # override
def apply(self):
'''process the data
This method is called automatically to process the data, *after*
the dialog is destroyed. By default, it does nothing.
'''
pass # override
# --------------------------------------------------------------------
# convenience dialogues
class _QueryDialog(Dialog):
def __init__(self, title, prompt,
initialvalue=None,
minvalue = None, maxvalue = None,
parent = None):
if not parent:
import Tkinter
parent = Tkinter._default_root
self.prompt = prompt
self.minvalue = minvalue
self.maxvalue = maxvalue
self.initialvalue = initialvalue
Dialog.__init__(self, parent, title)
def destroy(self):
self.entry = None
Dialog.destroy(self)
def body(self, master):
w = Label(master, text=self.prompt, justify=LEFT)
w.grid(row=0, padx=5, sticky=W)
self.entry = Entry(master, name="entry")
self.entry.grid(row=1, padx=5, sticky=W+E)
if self.initialvalue:
self.entry.insert(0, self.initialvalue)
self.entry.select_range(0, END)
return self.entry
def validate(self):
import tkMessageBox
try:
result = self.getresult()
except ValueError:
tkMessageBox.showwarning(
"Illegal value",
self.errormessage + "\nPlease try again",
parent = self
)
return 0
if self.minvalue is not None and result < self.minvalue:
tkMessageBox.showwarning(
"Too small",
"The allowed minimum value is %s. "
"Please try again." % self.minvalue,
parent = self
)
return 0
if self.maxvalue is not None and result > self.maxvalue:
tkMessageBox.showwarning(
"Too large",
"The allowed maximum value is %s. "
"Please try again." % self.maxvalue,
parent = self
)
return 0
self.result = result
return 1
class _QueryInteger(_QueryDialog):
errormessage = "Not an integer."
def getresult(self):
return int(self.entry.get())
def askinteger(title, prompt, **kw):
'''get an integer from the user
Arguments:
title -- the dialog title
prompt -- the label text
**kw -- see SimpleDialog class
Return value is an integer
'''
d = _QueryInteger(title, prompt, **kw)
return d.result
class _QueryFloat(_QueryDialog):
errormessage = "Not a floating point value."
def getresult(self):
return float(self.entry.get())
def askfloat(title, prompt, **kw):
'''get a float from the user
Arguments:
title -- the dialog title
prompt -- the label text
**kw -- see SimpleDialog class
Return value is a float
'''
d = _QueryFloat(title, prompt, **kw)
return d.result
class _QueryString(_QueryDialog):
def __init__(self, *args, **kw):
if "show" in kw:
self.__show = kw["show"]
del kw["show"]
else:
self.__show = None
_QueryDialog.__init__(self, *args, **kw)
def body(self, master):
entry = _QueryDialog.body(self, master)
if self.__show is not None:
entry.configure(show=self.__show)
return entry
def getresult(self):
return self.entry.get()
def askstring(title, prompt, **kw):
'''get a string from the user
Arguments:
title -- the dialog title
prompt -- the label text
**kw -- see SimpleDialog class
Return value is a string
'''
d = _QueryString(title, prompt, **kw)
return d.result
if __name__ == "__main__":
root = Tk()
root.update()
print askinteger("Spam", "Egg count", initialvalue=12*12)
print askfloat("Spam", "Egg weight\n(in tons)", minvalue=1, maxvalue=100)
print askstring("Spam", "Egg label")