from Tkinter import *
from ScrolledText import ScrolledText
from unicodedata import lookup
import os
class Diacritical:
"""Mix-in class that adds keyboard bindings for accented characters, plus
other common functionality.
An inheriting class must define a select_all method that will respond
to Ctrl-A."""
accents = (('acute', "'"), ('grave', '`'), ('circumflex', '^'),
('tilde', '='), ('diaeresis', '"'), ('cedilla', ','),
('stroke', '/'), ('ring above', ';'))
def __init__(self):
# Fix some key bindings
self.bind("<Control-Key-a>", self.select_all)
# We will need Ctrl-/ for the "stroke", but it cannot be unbound, so
# let's prevent it from being passed to the standard handler
self.bind("<Control-Key-/>", lambda event: "break")
# Diacritical bindings
for a, k in self.accents:
# Little-known feature of Tk, it allows to bind an event to
# multiple keystrokes
self.bind("<Control-Key-%s><Key>" % k,
lambda event, a=a: self.insert_accented(event.char, a))
def insert_accented(self, c, accent):
if c.isalpha():
if c.isupper():
cap = 'capital'
else:
cap = 'small'
try:
c = lookup("latin %s letter %c with %s" % (cap, c, accent))
self.insert(INSERT, c)
# Prevent plain letter from being inserted too, tell Tk to
# stop handling this event
return "break"
except KeyError, e:
pass
class DiacriticalEntry(Entry, Diacritical):
"""Tkinter Entry widget with some extra key bindings for
entering typical Unicode characters - with umlauts, accents, etc."""
def __init__(self, master=None, **kwargs):
Entry.__init__(self, master=None, **kwargs)
Diacritical.__init__(self)
def select_all(self, event=None):
self.selection_range(0, END)
return "break"
class DiacriticalText(ScrolledText, Diacritical):
"""Tkinter ScrolledText widget with some extra key bindings for
entering typical Unicode characters - with umlauts, accents, etc."""
def __init__(self, master=None, **kwargs):
ScrolledText.__init__(self, master=None, **kwargs)
Diacritical.__init__(self)
def select_all(self, event=None):
self.tag_add(SEL, "1.0", "end-1c")
self.mark_set(INSERT, "1.0")
self.see(INSERT)
return "break"
def test():
frame = Frame()
frame.pack(fill=BOTH, expand=YES)
if os.name == "nt":
# Set default font for all widgets; use Windows typical default
frame.option_add("*font", "Tahoma 8")
# The editors
entry = DiacriticalEntry(frame)
entry.pack(fill=BOTH, expand=YES)
text = DiacriticalText(frame, width=76, height=25, wrap=WORD)
if os.name == "nt":
# But this looks better than the default set above
text.config(font="Arial 10")
text.pack(fill=BOTH, expand=YES)
text.focus()
frame.master.title("Diacritical Editor")
frame.mainloop()
if __name__ == "__main__":
test()
