Python TKinter绑定输入密钥

Question

我试过应用其他几个SO问题答案中给出的各种示例，但它躲过了我。

我的目标是当按下“enter”键时能够将一行文本发送到telnet服务器。我的步骤是简单地将最后一行（因为前一个“输入”被按下）发送到输出面板。

我已经得到了一套笨拙的窗口，似乎已经附加了文本框，但是当我应用任何绑定类型代码时，我最终无法在输入文本框中写入。当我删除绑定代码时，我至少可以将文本输入到任一文本框中。

这个问题涉及到我的其他query，这就是为什么我现在试图吸收GUI编码。

的代码，它的骨架来自啧啧”的信息在Thinking in Tkinter

编辑：行代码改变重：老虎的意见

from Tkinter import * 

class MyApp: 
    def __init__(self, parent): 

     #------ constants for controlling layout of buttons ------ 
     button_width = 15 
     button_padx = "2m" 
     button_pady = "1m" 
     buttons_frame_padx = "3m" 
     buttons_frame_pady = "0m" 
     buttons_frame_ipadx = "3m" 
     buttons_frame_ipady = "0m" 
     # -------------- end button constants ---------------- 

     # First declare ORIGINAL Window area 
     self.myParent = parent 
     self.myParent.geometry("640x400") 

     # Layer ONE 
     ### Our First layer/frame is called frameLayerOne 
     self.frameLayerOne = Frame(parent, bg="green") 
     self.frameLayerOne.pack(expand=YES, fill=BOTH) 

     ### We will stack vertically inside frameLayerOne. 
     ### Inside frameLayerOne, we will create 
     ### a menu_frame, then a sub frame into which we will 
     ### put an output_frame and an input_frame. 

     # Layer TWO 
     # MENU FRAME - Layer Two 
     self.menu_frame = Frame(self.frameLayerOne, borderwidth=5, relief=RIDGE, bg="cyan") 
     self.menu_frame.pack(side=TOP, expand=NO, padx=0, pady=0, ipadx=0, ipady=0, fill=X) 

     MessageMenuFrame="Menu frame.\n" 
     # Label(self.menu_frame, text=MessageMenuFrame, justify=LEFT).pack(side=TOP, anchor=W) 

     # buttons frame 
     self.buttons_frame = Frame(self.menu_frame) # , bg="red" 
     self.buttons_frame.pack(side=TOP, 
      ipadx=buttons_frame_ipadx, 
      ipady=buttons_frame_ipady, 
      padx=buttons_frame_padx, 
      pady=buttons_frame_pady,) 

     # now we add the buttons to the buttons_frame 
     self.button1 = Button(self.buttons_frame, command=self.button1Click) 
     self.button1.configure(text="CONNECT", background= "green") 
     self.button1.focus_force() 
     self.button1.configure(width=button_width, 
      padx=button_padx, 
      pady=button_pady) 

     self.button1.pack(side=LEFT) 
     self.button1.bind("<Return>", self.button1Click_a) 

     self.button2 = Button(self.buttons_frame, command=self.button2Click) 
     self.button2.configure(text="QUIT", background="red") 
     self.button2.configure(width=button_width, 
      padx=button_padx, 
      pady=button_pady) 

     self.button2.pack(side=RIGHT) 
     self.button2.bind("<Return>", self.button2Click_a) 

     # SUB FRAME - Layer Two 
     self.sub_frame = Frame(self.frameLayerOne) # , bg="red" 
     self.sub_frame.pack(side=BOTTOM, expand=YES, padx=0, pady=0, ipadx=0, ipady=0, fill=BOTH) 

     # Layer THREE 
     # INPUT FRAME - Layer Three 
     self.input_frame = Frame(self.sub_frame, borderwidth=5, relief=RIDGE, bg="black") 
     self.input_frame.pack(side=BOTTOM, expand=NO, padx=0, pady=0, ipadx=0, ipady=0, fill=X) 

     # Text widget for user input to send to server 
     self.InputText = Text(self.input_frame, height=4, bg="black", fg="green") 
     self.InputText.pack() 
     self.InputText.insert(END, "User input here") 

     # Moded these two lines on Tiger's advice 
     self.input_frame.bindtags(('.input_frame','input_frame','post-class-bindings', '.', 'all')) 
     self.input_frame.bind_class('<Return>', self.return_key) 

     # OUTPUT FRAME - Layer Three 
     self.output_frame = Frame(self.sub_frame, borderwidth=5, relief=RIDGE, bg="blue") 
     self.output_frame.pack(side=BOTTOM, expand=YES, padx=0, pady=0, ipadx=5, ipady=25, fill=BOTH) 

     # Text widget for output from code and server 
     self.OutputText = Text(self.output_frame, bg="black", fg="green") 
     self.OutputText.pack() 
     self.OutputText.insert(END, "server and code output here") 


    def return_key(self, event): 
     text = "you pressed Return" 
     self.InputText.insert(END, text) 

    def button1Click(self): 
     if self.button1["background"] == "green": 
      self.button1["background"] = "yellow" 
     else: 
      self.button1["background"] = "green" 

    def button1Click_a(self, event): 
     self.button1Click() 


    def button2Click(self): 
     self.myParent.destroy() 


    def button2Click_a(self, event): 
     self.button2Click() 


root = Tk() 
myapp = MyApp(root) 
root.mainloop() 

Answer 1

我做了一些更改代码，标签关于知名度的评论T3。这允许您在Buttons和Text字段中使用Return，并且实际上使用“连接”按钮“救援”焦点。

from Tkinter import * 

class MyApp: 
    def __init__(self, parent): 

     #------ constants for controlling layout of buttons ------ 
     button_width = 15 
     button_padx = "2m" 
     button_pady = "1m" 
     buttons_frame_padx = "3m" 
     buttons_frame_pady = "0m" 
     buttons_frame_ipadx = "3m" 
     buttons_frame_ipady = "0m" 
     # -------------- end button constants ---------------- 

     # First declare ORIGINAL Window area 
     self.myParent = parent 
     self.myParent.geometry("640x400") 

     # Layer ONE 
     ### Our First layer/frame is called frameLayerOne 
     self.frameLayerOne = Frame(parent, bg="green") 
     self.frameLayerOne.pack(expand=YES, fill=BOTH) 

     ### We will stack vertically inside frameLayerOne. 
     ### Inside frameLayerOne, we will create 
     ### a menu_frame, then a sub frame into which we will 
     ### put an output_frame and an input_frame. 

     # Layer TWO 
     # MENU FRAME - Layer Two 
     self.menu_frame = Frame(self.frameLayerOne, borderwidth=5, relief=RIDGE, bg="cyan") 
     self.menu_frame.pack(side=TOP, expand=NO, padx=0, pady=0, ipadx=0, ipady=0, fill=X) 

     MessageMenuFrame="Menu frame.\n" 
     # Label(self.menu_frame, text=MessageMenuFrame, justify=LEFT).pack(side=TOP, anchor=W) 

     # buttons frame 
     self.buttons_frame = Frame(self.menu_frame) # , bg="red" 
     self.buttons_frame.pack(side=TOP, 
      ipadx=buttons_frame_ipadx, 
      ipady=buttons_frame_ipady, 
      padx=buttons_frame_padx, 
      pady=buttons_frame_pady,) 

     # now we add the buttons to the buttons_frame 
     self.button1 = Button(self.buttons_frame, command=self.button1Click) 
     self.button1.configure(text="CONNECT", background= "green") 
     self.button1.focus_force() 
     self.button1.configure(width=button_width, 
      padx=button_padx, 
      pady=button_pady) 

     self.button1.pack(side=LEFT) 
     # T3 - bound to regular button1Click 
     self.button1.bind("<Return>", self.button1Click) 

     self.button2 = Button(self.buttons_frame, command=self.button2Click) 
     self.button2.configure(text="QUIT", background="red") 
     self.button2.configure(width=button_width, 
      padx=button_padx, 
      pady=button_pady) 

     self.button2.pack(side=RIGHT) 
     # T3 - bound to regular button2Click 
     self.button2.bind("<Return>", self.button2Click) 

     # SUB FRAME - Layer Two 
     self.sub_frame = Frame(self.frameLayerOne) # , bg="red" 
     self.sub_frame.pack(side=BOTTOM, expand=YES, padx=0, pady=0, ipadx=0, ipady=0, fill=BOTH) 

     # Layer THREE 
     # INPUT FRAME - Layer Three 
     self.input_frame = Frame(self.sub_frame, borderwidth=5, relief=RIDGE, bg="black") 
     self.input_frame.pack(side=BOTTOM, expand=NO, padx=0, pady=0, ipadx=0, ipady=0, fill=X) 

     # Text widget for user input to send to server 
     self.InputText = Text(self.input_frame, height=4, bg="black", fg="green") 
     self.InputText.pack() 
     self.InputText.insert(END, "User input here") 

     self.InputText.bind('<Return>', self.return_key) 

     # OUTPUT FRAME - Layer Three 
     self.output_frame = Frame(self.sub_frame, borderwidth=5, relief=RIDGE, bg="blue") 
     self.output_frame.pack(side=BOTTOM, expand=YES, padx=0, pady=0, ipadx=5, ipady=25, fill=BOTH) 

     # Text widget for output from code and server 
     self.OutputText = Text(self.output_frame, bg="black", fg="green") 
     self.OutputText.pack() 
     self.OutputText.insert(END, "server and code output here") 


    def return_key(self, event): 
     text = "you pressed Return" 
     self.InputText.insert(END, text) 

    def button1Click(self, event=None): # T3 - give it a default event of None 
     if self.button1["background"] == "green": 
      self.button1["background"] = "yellow" 
     else: 
      self.button1["background"] = "green" 
     self.button1.focus_set() # T3 - set focus to this button so Return works 

    def button2Click(self, event=None): # T3 - give it a default event of None 
     self.myParent.destroy() 

root = Tk() 
myapp = MyApp(root) 
root.mainloop()