Tkinter-如何创建具有自动补全功能的组合框

Tkinter-如何创建具有自动补全功能的组合框

tkinter
Wiki包含一个自动完成文本框的代码，但是由于您需要一个组合框，因此可以使用此代码（您正在寻找

AutocompleteCombobox

）。

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"""tkentrycomplete.pyA Tkinter widget that features autocompletion.Created by Mitja Martini on 2008-11-29.Updated by Russell Adams, 2011/01/24 to support Python 3 and Combobox.Updated by Dominic Kexel to use Tkinter and ttk instead of tkinter and tkinter.ttk   Licensed same as original (not specified?), or public domain, whichever is less restrictive."""import sysimport osimport Tkinterimport ttk__version__ = "1.1"# I may have broken the unipre...Tkinter_umlauts=['odiaeresis', 'adiaeresis', 'udiaeresis', 'Odiaeresis', 'Adiaeresis', 'Udiaeresis', 'ssharp']class AutocompleteEntry(Tkinter.Entry):        """        Subclass of Tkinter.Entry that features autocompletion.        To enable autocompletion use set_completion_list(list) to define        a list of possible strings to hit.        To cycle through hits use down and up arrow keys.        """        def set_completion_list(self, completion_list):     self._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)        def autocomplete(self, delta=0):     """autocomplete the Entry, 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, Tkinter.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,Tkinter.END)  self.insert(0,self._hits[self._hit_index])  self.select_range(self.position,Tkinter.END)        def handle_keyrelease(self, event):     """event handler for the keyrelease event on this widget"""     if event.keysym == "BackSpace":  self.delete(self.index(Tkinter.INSERT), Tkinter.END)  self.position = self.index(Tkinter.END)     if event.keysym == "Left":  if self.position < self.index(Tkinter.END): # delete the selection          self.delete(self.position, Tkinter.END)  else:          self.position = self.position-1 # delete one character          self.delete(self.position, Tkinter.END)     if event.keysym == "Right":  self.position = self.index(Tkinter.END) # go to end (no selection)     if event.keysym == "Down":  self.autocomplete(1) # cycle to next hit     if event.keysym == "Up":  self.autocomplete(-1) # cycle to previous hit     if len(event.keysym) == 1 or event.keysym in Tkinter_umlauts:  self.autocomplete()class AutocompleteCombobox(ttk.Combobox):        def set_completion_list(self, completion_list):     """Use our completion list as our drop down selection menu, arrows move through menu."""     self._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, Tkinter.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,Tkinter.END)  self.insert(0,self._hits[self._hit_index])  self.select_range(self.position,Tkinter.END)        def handle_keyrelease(self, event):     """event handler for the keyrelease event on this widget"""     if event.keysym == "BackSpace":  self.delete(self.index(Tkinter.INSERT), Tkinter.END)  self.position = self.index(Tkinter.END)     if event.keysym == "Left":  if self.position < self.index(Tkinter.END): # delete the selection          self.delete(self.position, Tkinter.END)  else:          self.position = self.position-1 # delete one character          self.delete(self.position, Tkinter.END)     if event.keysym == "Right":  self.position = self.index(Tkinter.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 autocompletiondef test(test_list):        """Run a mini application to test the AutocompleteEntry Widget."""        root = Tkinter.Tk(className=' AutocompleteEntry demo')        entry = AutocompleteEntry(root)        entry.set_completion_list(test_list)        entry.pack()        entry.focus_set()        combo = AutocompleteCombobox(root)        combo.set_completion_list(test_list)        combo.pack()        combo.focus_set()        # I used a tiling WM with no controls, added a shortcut to quit        root.bind('<Control-Q>', lambda event=None: root.destroy())        root.bind('<Control-q>', lambda event=None: root.destroy())        root.mainloop()if __name__ == '__main__':        test_list = ('apple', 'banana', 'CranBerry', 'dogwood', 'alpha', 'Acorn', 'Anise' )        test(test_list)