Python Tkinter text editor with file dialogs

Python Tkinter Dialogs and File Handling: Exercise-11 with Solution

Write a Python program using Tkinter to build a text editor application that combines file open, save, and save as dialogs for editing text files.

Sample Solution:

Python Code:

import tkinter as tk
from tkinter import filedialog

def open_file():
    file_path = filedialog.askopenfilename(title="Open Text File", filetypes=[("Text files", "*.txt"), ("All files", "*.*")])
    if file_path:
        with open(file_path, 'r') as file:
            text_widget.delete("1.0", tk.END)
            text_widget.insert(tk.END, file.read())
        status_label.config(text=f"File opened: {file_path}")

def save_file():
    file_path = current_file.get()
    if file_path:
        try:
            with open(file_path, 'w') as file:
                text_content = text_widget.get("1.0", tk.END)
                file.write(text_content)
            status_label.config(text=f"File saved: {file_path}")
        except Exception as e:
            status_label.config(text=f"Error saving file: {str(e)}")
    else:
        save_as_file()
def save_as_file():
    file_path = filedialog.asksaveasfilename(defaultextension=".txt", filetypes=[("Text files", "*.txt"), ("All files", "*.*")])
    if file_path:
        current_file.set(file_path)
        save_file()
root = tk.Tk()
root.title("Text Editor")
current_file = tk.StringVar()
menu_bar = tk.Menu(root)
root.config(menu=menu_bar)
file_menu = tk.Menu(menu_bar, tearoff=0)
menu_bar.add_cascade(label="File", menu=file_menu)
file_menu.add_command(label="Open", command=open_file)
file_menu.add_command(label="Save", command=save_file)
file_menu.add_command(label="Save As", command=save_as_file)
file_menu.add_separator()
file_menu.add_command(label="Exit", command=root.destroy)
text_widget = tk.Text(root, wrap=tk.WORD)
text_widget.pack(padx=20, pady=20, fill="both", expand=True)
status_label = tk.Label(root, text="", padx=20, pady=10)
status_label.pack()
root.mainloop()

Explanation:

In the exercise above -

• Import "tkinter" as "tk" and "filedialog" for creating GUI components and opening file dialogs.
• Define the "open_file()" function, which displays a file dialog using "filedialog.askopenfilename()" function. This dialog allows the user to select a text file to open. If a file is selected, it reads the file content and displays it in the Text widget. The status label shows the opened file path.
• Define the save_file() function, which saves the current Text widget content to the current file path. If there is no current file path, it calls the "save_as_file()" function to specify a new file path. The status label shows messages about file saving or errors.
• Define the "save_as_file()" function, which opens a file save dialog using "filedialog.asksaveasfilename()" function. This dialog allows the user to specify a file path for saving the text. If a file path is selected, it sets the current file path and calls the "save_file()" function to save the content.
• Create the main Tkinter window, set its title, and create a Text widget for editing text.
• Create a StringVar variable current_file to keep track of the currently opened or saved file.
• Create a menu bar with a "File" menu that contains options for opening, saving, saving as, and exiting the program.
• The main event loop, "root.mainloop()", starts the Tkinter application.

Sample Output:

Flowchart:

Python Code Editor:

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