如果有多個條目，如何使用按鈕專門輸入每個tkinter條目？

Question

如果有多個條目，如何使用特定於每個條目的按鈕進行輸入（所以如果您單擊該按鈕，它不會填充所有條目，但只包含您所在的條目）。例如，爲了INOUT條目的a，b，d，K，C具體使用按鈕（如果你點擊一個按鈕，它輸入在輸入您已點擊之前的數目）

class PageDeg2 (tk.Frame): 
    def __init__(self, parent, controller): 
     def add_num(x): 
      a.insert(16,x) 
      b.insert(16,x) 
      c.insert(16,x) 
     tk.Frame.__init__(self, parent) 
     mainFunction = tk.Label (self, text = "y = ax^2 + bx + c", font = FONT) 
     mainFunction.grid (row = 0, column = 0) #### 

     label1 = tk.Label(self, text = "a = ", font = FONT, fg = 'red') 
     label1.grid (row = 1, column = 0) 

     label2 = tk.Label(self, text = "b = ", font = FONT, fg = 'orange') 
     label2.grid (row = 2, column = 0) 

     label3 = tk.Label (self, text = "c = ", font = FONT, fg = 'green') 
     label3.grid (row = 3, column = 0) 

     a = tk.Entry (self) 
     a.grid (row = 2, column = 1) 

     b = tk.Entry (self) 
     b.grid (row = 1, column = 1) 

     c = tk.Entry (self) 
     c.grid (row = 3, column = 1) 

     sLabel = tk.Label (self, text = "from ", font = FONT) 
     sLabel.grid (row = 4, column = 0) 
     start = tk.Entry (self) 
     start.grid (row = 4, column = 1) 
     eLabel = tk.Label (self, text = " to ", font = FONT) 
     eLabel.grid (row = 4, column = 2) 
     end = tk.Entry (self) 
     end.grid (row = 4, column = 3) 
     buttonG = tk.Button (self, text = "Graph") #function o Graph def graph 
     buttonG.grid (row = 5, column = 2)   
     buttonBack = tk.Button (self, text = "Back",command = lambda: controller.show_frame (PagePolynomial)) 
     buttonBack.grid (row = 6, column = 2) 

     Button(self,text='7',width=10,height=5,bg="WHITE",command=lambda:add_num('7')).grid(row=9,column=0,sticky=E+W+N+S) 
     Button(self,text='8',width=10,height=5,bg="WHITE",command=lambda:add_num('8')).grid(row=9,column=1,sticky=E+W+N+S) 
     Button(self,text='9',width=10,height=5,bg="WHITE",command=lambda:add_num('9')).grid(row=9,column=2,sticky=E+W+N+S) 


     Button(self,text='4',width=10,height=5,bg="WHITE",command=lambda:add_num('4')).grid(row=10,column=0,sticky=E+W+N+S) 
     Button(self,text='5',width=10,height=5,bg="WHITE",command=lambda:add_num('5')).grid(row=10,column=1,sticky=E+W+N+S) 
     Button(self,text='6',width=10,height=5,bg="WHITE",command=lambda:add_num('6')).grid(row=10,column=2,sticky=E+W+N+S) 


     Button(self,text='1',width=10,height=5,bg="WHITE",command=lambda:add_num('1')).grid(row=11,column=0,sticky=E+W+N+S) 
     Button(self,text='2',width=10,height=5,bg="WHITE",command=lambda:add_num('2')).grid(row=11,column=1,sticky=E+W+N+S) 
     Button(self,text='3',width=10,height=5,bg="WHITE",command=lambda:add_num('3')).grid(row=11,column=2,sticky=E+W+N+S) 



     Button(self,text='0',width=10,height=5,bg="WHITE",command=lambda:add_num('0')).grid(row=12,column=0,sticky=E+W+N+S) 
     Button(self,text='C',width=10,height=5,bg="BLUE",command=lambda:e1.delete(0,END)).grid(row=12,column=1,sticky=E+W+N+S) 
     Button(self,text='.',width=10,height=5,bg="WHITE",command=lambda:add_num('.')).grid(row=12,column=2,sticky=E+W+N+S) 

Answer 1

通常，當以編程方式將要插入的文本插入到具有鍵盤焦點的任何小部件中，並且通常您要在插入光標處執行該操作。您可以使用tkinter方法focus_get獲得鍵盤焦點，並且您可以將插入光標引用爲"insert"。

例如：

def add_num(x): 
    widget = self.focus_get() 
    if widget and hasattr(widget, "insert"): 
     widget.insert("insert", x) 

注意：如果你總是希望附加條目的數量，使用"end"而非"insert"。