Addtional_features.py

import tkinter
import tkinter.ttk

tkinter_umlauts=['odiaeresis', 'adiaeresis', 'udiaeresis', 'Odiaeresis', 'Adiaeresis', 'Udiaeresis', 'ssharp']
class myentry(tkinter.Entry):
        def set_completion_list(self, completion_list):
                self._completion_list = sorted(completion_list, key=str.lower)
                self._hits = []
                self._hit_index = 0
                self.position = 0
                self.bind('<KeyRelease>', self.handle_keyrelease)

        def autocomplete(self, delta=0):
                if delta:
                        self.delete(self.position, tkinter.END)
                else:
                        self.position = len(self.get())
                _hits = []
                for element in self._completion_list:
                        if element.lower().startswith(self.get().lower()):
                                _hits.append(element)
                if _hits != self._hits:
                        self._hit_index = 0
                        self._hits=_hits
                if _hits == self._hits and self._hits:
                        self._hit_index = (self._hit_index + delta) % len(self._hits)
                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):
                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):
                                self.delete(self.position, tkinter.END)
                        else:
                                self.position = self.position-1
                                self.delete(self.position, tkinter.END)
                if event.keysym == "Right":
                        self.position = self.index(tkinter.END)
                if event.keysym == "Down":
                        self.autocomplete(1)
                if event.keysym == "Up":
                        self.autocomplete(-1)
                if len(event.keysym) == 1 or event.keysym in tkinter_umlauts:
                        self.autocomplete()

class  mycombobox(tkinter.ttk.Combobox):

        def set_completion_list(self, completion_list):
                self._completion_list = sorted(completion_list, key=str.lower)
                self._hits = []
                self._hit_index = 0
                self.position = 0
                self.bind('<KeyRelease>', self.handle_keyrelease)
                self['values'] = self._completion_list

        def autocomplete(self, delta=0):
                if delta:
                        self.delete(self.position, tkinter.END)
                else:
                        self.position = len(self.get())
                _hits = []
                for element in self._completion_list:
                        if element.lower().startswith(self.get().lower()): # Match case insensitively
                                _hits.append(element)
                if _hits != self._hits:
                        self._hit_index = 0
                        self._hits=_hits
                if _hits == self._hits and self._hits:
                        self._hit_index = (self._hit_index + delta) % len(self._hits)
                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):
                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):
                                self.delete(self.position, tkinter.END)
                        else:
                                self.position = self.position-1
                                self.delete(self.position, tkinter.END)
                if event.keysym == "Right":
                        self.position = self.index(tkinter.END)
                if len(event.keysym) == 1:
                        self.autocomplete()
# TEST THIS
def test(test_list):
        root = tkinter.Tk(className=' AutocompleteEntry demo')
        entry = myentry(root)
        entry.set_completion_list(test_list)
        entry.pack()
        entry.focus_set()
        combo = mycombobox(root)
        combo.set_completion_list(test_list)
        combo.pack()
        combo.focus_set()
        root.bind('<Control-Q>', lambda event=None: root.destroy())
        root.bind('<Control-q>', lambda event=None: root.destroy())
        root.mainloop()