How to get an Entry box within a Messagebox in Tkinter?

Tkinter's messagebox library provides various dialog functions, but none directly combine a message with an entry field. To create an entry box within a messagebox-like dialog, you can use the askstring function from tkinter.simpledialog. This creates a simple dialog window that prompts the user for text input.

Using askstring() Method

The askstring() function takes two main parameters: the dialog title and the prompt message displayed above the entry field ?

# Import the required library
from tkinter import *
from tkinter.simpledialog import askstring
from tkinter.messagebox import showinfo

# Create an instance of tkinter frame and window
win = Tk()
win.geometry("700x300")

name = askstring('Name', 'What is your name?')
if name:
    showinfo('Hello!', 'Hi, {}!'.format(name))

win.mainloop()

Creating a Custom Dialog with Entry

For more control over the dialog appearance, you can create a custom dialog box with an entry widget ?

from tkinter import *
from tkinter import messagebox

def get_user_input():
    # Create a custom dialog window
    dialog = Toplevel()
    dialog.title("User Input")
    dialog.geometry("300x150")
    dialog.resizable(False, False)
    
    # Center the dialog
    dialog.grab_set()
    
    # Add label and entry
    Label(dialog, text="Enter your message:", font=("Arial", 10)).pack(pady=10)
    
    entry = Entry(dialog, font=("Arial", 10), width=25)
    entry.pack(pady=5)
    entry.focus()
    
    result = StringVar()
    
    def on_ok():
        result.set(entry.get())
        dialog.destroy()
    
    def on_cancel():
        dialog.destroy()
    
    # Add buttons
    button_frame = Frame(dialog)
    button_frame.pack(pady=10)
    
    Button(button_frame, text="OK", command=on_ok, width=8).pack(side=LEFT, padx=5)
    Button(button_frame, text="Cancel", command=on_cancel, width=8).pack(side=LEFT, padx=5)
    
    # Wait for dialog to close
    dialog.wait_window()
    return result.get()

# Main window
root = Tk()
root.geometry("400x200")
root.title("Custom Entry Dialog")

def show_dialog():
    user_input = get_user_input()
    if user_input:
        messagebox.showinfo("Result", f"You entered: {user_input}")

Button(root, text="Open Dialog", command=show_dialog, font=("Arial", 12)).pack(pady=50)

root.mainloop()

Comparison

Conclusion

Use askstring() for simple text input dialogs. For more complex requirements with custom styling or multiple fields, create a custom dialog using Toplevel() widgets.