我正在尝试使用python 3在tkinter中创建一个组合框，当按下第一个字母时，该组合框具有自动完成功能，但也是只读的，因此只能选择列表中的名称。
有一些旧代码适用于自动完成：
class AutocompleteCombobox(ttk.Combobox): #https://mail.python.org/pipermail/tkinter-discuss/2012-January/003041.html
def set_completion_list(self, completion_list):
"""Use our completion list as our drop down selection menu, arrows move through menu."""
self._completion_list = completion_list #sorted(completion_list, key=str.lower) # Work with a sorted list
self._hits = []
self._hit_index = 0
self.position = 0
self.bind('<KeyRelease>', self.handle_keyrelease)
self['values'] = self._completion_list # Setup our popup menu
def autocomplete(self, delta=0):
"""autocomplete the Combobox, delta may be 0/1/-1 to cycle through possible hits"""
if delta: # need to delete selection otherwise we would fix the current position
self.delete(self.position, END)
else: # set position to end so selection starts where textentry ended
self.position = len(self.get())
# collect hits
_hits = []
for element in self._completion_list:
if element.lower().startswith(self.get().lower()): # Match case insensitively
_hits.append(element)
# if we have a new hit list, keep this in mind
if _hits != self._hits:
self._hit_index = 0
self._hits=_hits
# only allow cycling if we are in a known hit list
if _hits == self._hits and self._hits:
self._hit_index = (self._hit_index + delta) % len(self._hits)
# now finally perform the auto completion
if self._hits:
self.delete(0,END)
self.insert(0,self._hits[self._hit_index])
self.select_range(self.position,END)
def handle_keyrelease(self, event):
"""event handler for the keyrelease event on this widget"""
if event.keysym == "BackSpace":
self.delete(self.index(INSERT), END)
self.position = self.index(END)
if event.keysym == "Left":
if self.position < self.index(END): # delete the selection
self.delete(self.position, END)
else:
self.position = self.position-1 # delete one character
self.delete(self.position, END)
if event.keysym == "Right":
self.position = self.index(END) # go to end (no selection)
if len(event.keysym) == 1:
self.autocomplete()
# No need for up/down, we'll jump to the popup
# list at the position of the autocompletion
但挑战在于，如果将状态设置为“只读”，则不起作用：
self.combo1 = AutocompleteCombobox(mainframe, width=12, state="readonly")
我想要的是组合框跳转到列表中的第一个名字，如果我按下该字母，则以给定的字母开头，如果没有以该字母开头的有效名称，则保持空白。< / p>
另一个相关问题是，使用上述自动完成时不会触发ComboboxSelected绑定：
self.combo1.bind("<<ComboboxSelected>>", self.selected)
将触发self.selected，但在您获得自动完成时则不会。