tkinter自定义下拉多选框问题

import tkinter
 
from ComBoPicker import Combopicker
 
list = ["全选", "选项1", "选项2", "选项3", "选项4", "选项5", "选项6"]
root = tkinter.Tk()
co = Combopicker(root, values=list)
co.pack()
root.geometry("800x600")
 
root.mainloop()

'''
	自定义多选下拉列表
'''
import tkinter.ttk as ttk
from tkinter import *
 
 
class Picker(ttk.Frame):#选择器
 
    def __init__(self, master=None, activebackground='#b1dcfb', values=[], entry_wid=None, activeforeground='black',
                 selectbackground='#003eff', selectforeground='white', command=None, borderwidth=1, relief="solid"):
 
        self._selected_item = None
 
        self._values = values
 
        self._entry_wid = entry_wid
 
        self._sel_bg = selectbackground
        self._sel_fg = selectforeground
 
        self._act_bg = activebackground
        self._act_fg = activeforeground
 
        self._command = command
        self.index = 0
        ttk.Frame.__init__(self, master, borderwidth=borderwidth, height=10, relief=relief)
 
        self.bind("<FocusIn>", lambda event: self.event_generate('<<PickerFocusIn>>'))
        self.bind("<FocusOut>", lambda event: self.event_generate('<<PickerFocusOut>>'))
        F = LabelFrame(self)
        F.pack(fill='x')
        self.canvas = Canvas(F, scrollregion=(0, 0, 500, (len(self._values) * 23)))
 
 
        vbar = Scrollbar(F, orient=VERTICAL)
        vbar.pack(side=RIGHT, fill=Y)
 
        frame = Frame(self.canvas) #创建框架
        vbar.config(command=self.canvas.yview)
 
        sbar2 = Scrollbar(F, orient=HORIZONTAL)
        sbar2.pack(side=BOTTOM, fill=X)
        sbar2.config(command=self.canvas.yview)
        # self.canvas.pack(side='left',fill='x',expand=True)
        self.canvas.create_window((0, 0,), window=frame, anchor='nw', tags='frame')
 
        self.canvas.config(highlightthickness=0)  # 去掉选中边框
        vbar.config(command=self.canvas.yview)
        sbar2.config(command=self.canvas.xview)
        self.canvas.config(width=300, height=150)
        self.canvas.config(yscrollcommand=vbar.set,xscrollcommand=sbar2.set)
        # self.canvas.config(scrollregion=self.canvas.bbox('all'))
        # self._font = tkFont.Font()
        self.dict_checkbutton = {}
        self.dict_checkbutton_var = {}
        self.dict_intvar_item = {}
        for index, item in enumerate(self._values):
            self.dict_intvar_item[item] = IntVar()
            self.dict_checkbutton[item] = ttk.Checkbutton(frame, text=item, variable=self.dict_intvar_item[item],
                                                          command=lambda ITEM=item: self._command(ITEM))
            self.dict_checkbutton[item].grid(row=index, column=0, sticky=NSEW, padx=5)
            self.dict_intvar_item[item].set(0)
            if item in self._entry_wid.get().split(','):
                self.dict_intvar_item[item].set(1)
        self.canvas.pack(side=LEFT, expand=True, fill=BOTH)
        self.canvas.bind("<MouseWheel>", self.processWheel)
        frame.bind("<MouseWheel>", self.processWheel)
        for i in self.dict_checkbutton:
            self.dict_checkbutton[i].bind("<MouseWheel>", self.processWheel)
        self.bind("<MouseWheel>", self.processWheel)
 
 
 
    def processWheel(self, event):
        a = int(-(event.delta))
        if a > 0:
            self.canvas.yview_scroll(1, UNITS)
        else:
            self.canvas.yview_scroll(-1, UNITS)
 
 
class Combopicker(ttk.Combobox, Picker):
    def __init__(self, master, values=[], entryvar=None, entrywidth=None, entrystyle=None, onselect=None,
                 activebackground='#ef476f', activeforeground='red', selectbackground='#ffd166',
                 selectforeground='green', borderwidth=1, relief="solid"):
 
        self.values = values
        self.master = master
        self.activeforeground = activeforeground
        self.activebackground = activebackground
        self.selectbackground = selectbackground
        self.selectforeground = selectforeground
 
        if entryvar is not None:
            self.entry_var = entryvar
        else:
            self.entry_var = StringVar()
 
        entry_config = {}
        if entrywidth is not None:
            entry_config["width"] = entrywidth
 
 
 
 
        if entrystyle is not None:
            entry_config["style"] = entrystyle
 
        ttk.Entry.__init__(self, master, textvariable=self.entry_var, **entry_config, state="")
 
        self._is_menuoptions_visible = False
 
        self.picker_frame = Picker(self.winfo_toplevel(), values=values, entry_wid=self.entry_var,
                                   activebackground=activebackground, activeforeground=activeforeground,
                                   selectbackground=selectbackground, selectforeground=selectforeground,
                                   command=self._on_selected_check)
 
        self.bind_all("<1>", self._on_click, "+")
 
        self.bind("<Escape>", lambda event: self.hide_picker())
 
    @property
    def current_value(self):
        try:
            value = self.entry_var.get()
            return value
        except ValueError:
            return None
 
    @current_value.setter
    def current_value(self, INDEX):
        self.entry_var.set(self.values.index(INDEX))
 
    def _on_selected_check(self, SELECTED):
        value = []
        if self.entry_var.get() != "" and self.entry_var.get() != None:
            temp_value = self.entry_var.get()
            value = temp_value.split(",")
 
        if str(SELECTED) in value:
            if '全选' == str(SELECTED):
                value.clear()  # 清空选项
            else:
                value.remove(str(SELECTED))
                value.sort()
        else:
            if '全选' == str(SELECTED):
                value = self.values
            else:
                value.append(str(SELECTED))
                value.sort()
 
        temp_value = ""
        for index, item in enumerate(value):
            if item != "":
                if index != 0:
                    temp_value += ","
                temp_value += str(item)
        self.entry_var.set(temp_value)
        # 可以通过复选框的variable来让勾选中或取消，但下面也行，问题不大
        if '全选' == str(SELECTED):
            self.hide_picker()
            self.show_picker()
 
    def _on_click(self, event):
        str_widget = str(event.widget)
 
        if str_widget == str(self):
            if not self._is_menuoptions_visible:
                self.show_picker()
        else:
            if not str_widget.startswith(str(self.picker_frame)) and self._is_menuoptions_visible:
                self.hide_picker()
 
    def show_picker(self):
        if not self._is_menuoptions_visible:
            self.picker_frame = Picker(self.winfo_toplevel(), values=self.values, entry_wid=self.entry_var,
                                       activebackground=self.activebackground,
                                       activeforeground=self.activeforeground, selectbackground=self.selectbackground,
                                       selectforeground=self.selectforeground, command=self._on_selected_check)
 
            self.bind_all("<1>", self._on_click, "+")
 
            self.bind("<Escape>", lambda event: self.hide_picker())
            self.picker_frame.lift()
            self.picker_frame.place(in_=self, relx=0, rely=1, relwidth=1)
 
        self._is_menuoptions_visible = True
 
    def hide_picker(self):
        if self._is_menuoptions_visible:
            self.picker_frame.place_forget()  # 不知道为什么这个方式在Mac下不起作用，所以就直接销毁这个控件
            # self.picker_frame.destroy()
 
        self._is_menuoptions_visible = False