如何獲取並從組合框中同時傳遞一個選定的值到功能

Question

我想從組合框中獲取選定的值，同時我必須將該值傳遞給其他調用函數，如何執行此操作？我寫的代碼不足以達到這個要求，有人請​​幫助我。我熟悉C＃和其他語言中的SelectedIndexChanged！它是否與Tkinter python類似？

def fill_Combo(self): 
    combo1= ttk.Combobox(frame1,height=1, width=20) 
    combo1['values'] = ("AA","BB","CC","DD","EE") 
    combo1.current(0) 
    combo1.pack()     
    combo1.place(x=5, y = 75) 
    var_Selected=combo1.current() 
    combo1.bind("<<ComboboxSelected>>",select_Combo(var_Selected)) 


def select_Combo(self,var_Selected): 
    print "The user selected value now is:" 
    print var_Selected 

Answer 1

眼下，var_Selected始終爲0，因爲在創建組合框，當設定的電流爲0，只需設置一次var_Selected這個值。你需要做的是在執行select_Combo時獲得combo1.current()。您可以通過將combo1重命名爲self.combo1來完成此操作，然後通過自我將其自動傳遞至select_Combo。然後你可以得到當前的價值，並用它做任何你想要的。 並且不要同時使用pack和place，選擇一個。

例子：

from Tkinter import * 
import ttk 

class app(): 

    def __init__(self): 
     self.root = Tk() 
     self.fill_Combo() 
     self.root.mainloop() 

    def fill_Combo(self): 
     self.combo1= ttk.Combobox(self.root,height=1, width=20) 
     self.combo1['values'] = ("AA","BB","CC","DD","EE") 
     self.combo1.current(0)    
     self.combo1.place(x=5, y = 75) 
     self.combo1.bind("<<ComboboxSelected>>",self.select_Combo) 

    def select_Combo(self, event): 
     self.var_Selected = self.combo1.current() 
     print "The user selected value now is:" 
     print self.var_Selected 
     # Any other function you want to use as function(self.var_Selected) or a function that gets self 

app()