在 Tkinter 中输入键绑定

Question

所以，我一直在尝试将回车键绑定到按下我在这个 python 程序中的按钮——是的，我已经看到了许多与此相关的其他问题，但是他们的代码都没有与这个程序一起使用不管什么原因。在下面发布代码，看看是否有人有好的解决方案。

下面的代码按预期完成所有事情——它会拉出 GUI，显示愚蠢的 jar-jar 图片、按钮和带有预填充文本的输入字段，但我键盘上的 enter 键不会产生结果就像我用鼠标按下按钮时发生的那样。

import tkinter as tk
from PIL import Image, ImageTk, ImageTransform
from tkinter.filedialog import askopenfile

root = tk.Tk()


class guiMenu:
    def __init__(self, master):
        myFrame = tk.Frame(master)

        # logo

        logo = Image.open('jar.jpg')
        logo2 = logo.resize((200, 200), Image.ANTIALIAS)
        logo2 = ImageTk.PhotoImage(logo2)
        self.logo_label = tk.Label(image=logo2)
        self.logo_label.image = logo2
        self.logo_label.grid(column=1, row=0)

        # instructions
        self.instructions = tk.Label(master,
                                     text="Input your email address and password to extract email attachments.\n "
                                          "You should also select the folder you wish the attachments to reach.")
        self.instructions.grid(columnspan=3, column=0, row=3)

        # store the user login info in variables
        def storeUserLogin():
            clientEmailInput = self.emailEntry.get()
            clientPasswordInput = self.passwordEntry.get()
            print(clientEmailInput, clientPasswordInput)

        # delete email prefill on click
        def onEmailClick(event):
            self.emailEntry.configure()
            self.emailEntry.delete(0, 100)  # this deletes the preexisting text for email entry
            self.emailEntry.unbind('<Button-1>', self.on_click_id)

        # delete pw prefill on click
        def onPWClick(event):
            self.passwordEntry.configure()
            self.passwordEntry.delete(0, 100)  # this deletes the preexisting text for email entry
            self.passwordEntry.unbind('<Button-1>', self.on_click_id2)

        # email entry box
        self.emailEntry = tk.Entry(master, width=50)
        # emailEntry = tk.StringVar(None)
        # emailEntry.set("Email Address")
        self.emailEntry = tk.Entry()
        self.emailEntry.insert(0, "Email Address")
        self.emailEntry.configure()
        self.emailEntry.grid(column=1, row=1)

        # on-click function
        self.on_click_id = self.emailEntry.bind('<Button-1>', onEmailClick)

        # enter key function
        def enterFunction(event=None):
            master.bind('<Return>', lambda event=None, loginButton.invoke())

        # password entry box

        self.passwordEntry = tk.Entry()
        self.passwordEntry.insert(0, "Password")
        self.passwordEntry.grid(column=1, row=2)

        # on click function
        self.on_click_id2 = self.passwordEntry.bind('<Button-1>', onPWClick)

        # button to login
        def loginButton():
            self.loginButtonText = tk.StringVar()
            self.loginButton = tk.Button(master, textvariable=self.loginButtonText, font="Arial",
                                         commands=lambda: [storeUserLogin(), enterFunction()],
                                         width=5, height=2,
                                         bg="white", fg="black")
            self.loginButtonText.set("LOGIN")
            self.loginButton.grid(column=1, row=4)

        self.canvas = tk.Canvas(root, width=600, height=250)
        self.canvas.grid(columnspan=3)


g = guiMenu(root)
root.mainloop()

Answer 1

您正在将 loginButton 函数绑定到另一个从未调用过的函数中，并且您在此处编写了错误的 OOP。您不应该在 init 函数中定义您的函数。这是我在您的代码中所做的一些更改。我不擅长解释，但我希望这会有所帮助。我也在代码中写了原因，我更改了代码。

import tkinter as tk
from PIL import Image, ImageTk, ImageTransform
from tkinter.filedialog import askopenfile

root = tk.Tk()


class guiMenu:
    def __init__(self, master):
        #definr master in Class so we can use it from entire class
        self.master = master
        myFrame = tk.Frame(master)

        # logo

        logo = Image.open('Spitball\Spc.jpg')
        logo2 = logo.resize((200, 200), Image.ANTIALIAS)
        logo2 = ImageTk.PhotoImage(logo2)
        self.logo_label = tk.Label(image=logo2)
        self.logo_label.image = logo2
        self.logo_label.grid(column=1, row=0)
        
        #Create Email Entry box (we are creating Email and Password entry box when class is initialize)
        self.emailEntry = tk.Entry(master, width=50)
        self.emailEntry.insert(0, "Email Address")
        # emailEntry = tk.StringVar(None)
        # emailEntry.set("Email Address")
        # self.emailEntry = tk.Entry() # You should not create two entry boxes with same name
        # self.emailEntry.configure() # We dont need to configure email entry here 

        #Create Password Entry box (we are creating Email and Password entry box when class is initialize)

        self.passwordEntry = tk.Entry()
        self.passwordEntry.insert(0, "Password")
        
        #Grid the email and password entry box.Here email entry box will display first beacuse we grid it first.
        self.emailEntry.grid(column=1, row=1)
        self.passwordEntry.grid(column=1, row=2)

        # instructions
        self.instructions = tk.Label(master,
                                     text="Input your email address and password to extract email attachments.\n "
                                          "You should also select the folder you wish the attachments to reach.")
        self.instructions.grid(columnspan=3, column=0, row=3)

        #Create Login Button 
        self.loginButtonText = tk.StringVar()
        self.loginButton = tk.Button(self.master, textvariable=self.loginButtonText, font="Arial",
                                    command=self.storeUserLogin,
                                    width=5, height=2,
                                    bg="white", fg="black")

        # I dont see here the use of Canvas so i commented out it. 
        # self.canvas = tk.Canvas(self.master, width=600, height=250)

        # on-click function
        self.on_click_id = self.emailEntry.bind('', self.onEmailClick)


        # on click function
        self.on_click_id2 = self.passwordEntry.bind('', self.onPWClick)

        #Bind enter key with loginButtonFunc
        self.master.bind('',self.loginButtonFunc)


    def storeUserLogin(self):
        # store the user login info in variables
        clientEmailInput = self.emailEntry.get()
        clientPasswordInput = self.passwordEntry.get()
        print(clientEmailInput, clientPasswordInput)

        # delete email prefill on click
    def onEmailClick(self,event):
        self.emailEntry.configure()
        self.emailEntry.delete(0, 100)  # this deletes the preexisting text for email entry
        self.emailEntry.unbind('', self.on_click_id)

        # delete pw prefill on click
    def onPWClick(self,event):
        self.passwordEntry.configure()
        self.passwordEntry.delete(0, 100)  # this deletes the preexisting text for email entry
        self.passwordEntry.unbind('', self.on_click_id2)

        # button to login
    def loginButtonFunc(self,event=None):
 
        self.loginButtonText.set("LOGIN")
        self.loginButton.grid(column=1, row=4,pady=5)

        # self.canvas.grid(columnspan=3)


g = guiMenu(root)
root.mainloop()