mirror of
https://github.com/python/cpython.git
synced 2025-11-04 07:31:38 +00:00
423 lines
11 KiB
Python
423 lines
11 KiB
Python
#
|
|
# An Introduction to Tkinter
|
|
#
|
|
# Copyright (c) 1997 by Fredrik Lundh
|
|
#
|
|
# This copyright applies to Dialog, askinteger, askfloat and asktring
|
|
#
|
|
# fredrik@pythonware.com
|
|
# http://www.pythonware.com
|
|
#
|
|
"""This modules handles dialog boxes.
|
|
|
|
It contains the following public symbols:
|
|
|
|
SimpleDialog -- A simple but flexible modal dialog box
|
|
|
|
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 *
|
|
from tkinter import messagebox
|
|
|
|
import tkinter # used at _QueryDialog for tkinter._default_root
|
|
|
|
class SimpleDialog:
|
|
|
|
def __init__(self, master,
|
|
text='', buttons=[], default=None, cancel=None,
|
|
title=None, class_=None):
|
|
if class_:
|
|
self.root = Toplevel(master, class_=class_)
|
|
else:
|
|
self.root = Toplevel(master)
|
|
if title:
|
|
self.root.title(title)
|
|
self.root.iconname(title)
|
|
self.message = Message(self.root, text=text, aspect=400)
|
|
self.message.pack(expand=1, fill=BOTH)
|
|
self.frame = Frame(self.root)
|
|
self.frame.pack()
|
|
self.num = default
|
|
self.cancel = cancel
|
|
self.default = default
|
|
self.root.bind('<Return>', self.return_event)
|
|
for num in range(len(buttons)):
|
|
s = buttons[num]
|
|
b = Button(self.frame, text=s,
|
|
command=(lambda self=self, num=num: self.done(num)))
|
|
if num == default:
|
|
b.config(relief=RIDGE, borderwidth=8)
|
|
b.pack(side=LEFT, fill=BOTH, expand=1)
|
|
self.root.protocol('WM_DELETE_WINDOW', self.wm_delete_window)
|
|
self._set_transient(master)
|
|
|
|
def _set_transient(self, master, relx=0.5, rely=0.3):
|
|
widget = self.root
|
|
widget.withdraw() # Remain invisible while we figure out the geometry
|
|
widget.transient(master)
|
|
widget.update_idletasks() # Actualize geometry information
|
|
if master.winfo_ismapped():
|
|
m_width = master.winfo_width()
|
|
m_height = master.winfo_height()
|
|
m_x = master.winfo_rootx()
|
|
m_y = master.winfo_rooty()
|
|
else:
|
|
m_width = master.winfo_screenwidth()
|
|
m_height = master.winfo_screenheight()
|
|
m_x = m_y = 0
|
|
w_width = widget.winfo_reqwidth()
|
|
w_height = widget.winfo_reqheight()
|
|
x = m_x + (m_width - w_width) * relx
|
|
y = m_y + (m_height - w_height) * rely
|
|
if x+w_width > master.winfo_screenwidth():
|
|
x = master.winfo_screenwidth() - w_width
|
|
elif x < 0:
|
|
x = 0
|
|
if y+w_height > master.winfo_screenheight():
|
|
y = master.winfo_screenheight() - w_height
|
|
elif y < 0:
|
|
y = 0
|
|
widget.geometry("+%d+%d" % (x, y))
|
|
widget.deiconify() # Become visible at the desired location
|
|
|
|
def go(self):
|
|
self.root.wait_visibility()
|
|
self.root.grab_set()
|
|
self.root.mainloop()
|
|
self.root.destroy()
|
|
return self.num
|
|
|
|
def return_event(self, event):
|
|
if self.default is None:
|
|
self.root.bell()
|
|
else:
|
|
self.done(self.default)
|
|
|
|
def wm_delete_window(self):
|
|
if self.cancel is None:
|
|
self.root.bell()
|
|
else:
|
|
self.done(self.cancel)
|
|
|
|
def done(self, num):
|
|
self.num = num
|
|
self.root.quit()
|
|
|
|
|
|
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 visible 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("<Return>", self.ok)
|
|
self.bind("<Escape>", 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:
|
|
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 is not None:
|
|
self.entry.insert(0, self.initialvalue)
|
|
self.entry.select_range(0, END)
|
|
|
|
return self.entry
|
|
|
|
def validate(self):
|
|
try:
|
|
result = self.getresult()
|
|
except ValueError:
|
|
messagebox.showwarning(
|
|
"Illegal value",
|
|
self.errormessage + "\nPlease try again",
|
|
parent = self
|
|
)
|
|
return 0
|
|
|
|
if self.minvalue is not None and result < self.minvalue:
|
|
messagebox.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:
|
|
messagebox.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 self.getint(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 self.getdouble(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__':
|
|
|
|
def test():
|
|
root = Tk()
|
|
def doit(root=root):
|
|
d = SimpleDialog(root,
|
|
text="This is a test dialog. "
|
|
"Would this have been an actual dialog, "
|
|
"the buttons below would have been glowing "
|
|
"in soft pink light.\n"
|
|
"Do you believe this?",
|
|
buttons=["Yes", "No", "Cancel"],
|
|
default=0,
|
|
cancel=2,
|
|
title="Test Dialog")
|
|
print(d.go())
|
|
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"))
|
|
t = Button(root, text='Test', command=doit)
|
|
t.pack()
|
|
q = Button(root, text='Quit', command=t.quit)
|
|
q.pack()
|
|
t.mainloop()
|
|
|
|
test()
|