Resolved #11 - some code cleanup and organizing

.gitignore

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+.mypy_cache
+__pycache__

deregtxt

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+#!/usr/bin/env python3
+
+import libderegtxt
+
+
+# Package meta-data.
+NAME = 'Deregtext'
+DESCRIPTION = 'Text editor software'
+URL = 'https://github.com/askmarkio/deregtext'
+EMAIL = 'mark@askmark.io'
+AUTHOR = 'Mark'
+REQUIRES_PYTHON = '>=3.6.0'
+VERSION = '0.1.0'
+
+libderegtxt.main()

libderegtxt.py

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+from tkinter import *
+import tkinter.filedialog as fd
+import tkinter.messagebox as mb
+from PIL import Image, ImageTk
+import os
+
+# Creating all the functions of all the buttons in the Deregtext
+def open_file():
+    """
+    Function to open files.
+    The default extension is ".dgt"
+    """
+
+    file = fd.askopenfilename(
+        defaultextension=".dgt",
+        filetypes=[("All Files", "*.*"), ("Text File", "*.dgt")],
+    )
+
+    if file != "":
+        root.title(f"{os.path.basename(file)}")
+        text_area.delete(1.0, END)
+        with open(file, "r") as file_:
+            text_area.insert(1.0, file_.read())
+            file_.close()
+    else:
+        file = None
+
+
+def open_new_file():
+    """
+    Opens a new file and deletes all content in the text area.
+    """
+
+    root.title("Untitled - Deregtext")
+    text_area.delete(1.0, END)
+
+def save_file():
+    """
+    Function to save file.
+    Provides defaults for the user to overwrite.
+    """
+
+    global text_area
+    file_path = fd.asksaveasfilename(initialfile='Untitled.dgt', defaultextension='.txt', filetypes=[("Text File", "*.txt"), ("Word Document", '*.docx'), ("PDF", "*.pdf")])
+    if file_path:
+        with open(file_path, "w") as file:
+            file.write(text_area.get(1.0, END))
+        root.title(f"{os.path.basename(file_path)} - Deregtext")
+
+def exit_application():
+    root.destroy()
+
+
+def copy_text():
+    text_area.event_generate("<<Copy>>")
+
+
+def cut_text():
+    text_area.event_generate("<<Cut>>")
+
+
+def paste_text():
+    text_area.event_generate("<<Paste>>")
+
+
+def select_all():
+    """
+    Function to select all text within the text area.
+    'sel' defines the selection while '1.0' denotes the
+    start point and the end point is 'end'
+    """
+    text_area.tag_add('sel', '1.0', 'end')
+    return 'break'
+
+
+def delete_last_char():
+    text_area.event_generate("<<KP_Delete>>")
+
+
+def about_deregtext():
+
+    aboutdereg = """
+    About Deregtext
+
+    This is the first application from the DeregSoftware suite 
+    of apps. In reality, this is a coding project to learn 
+    Python. I have learned a bit as I've squashed bugs and 
+    implemented some features. Stay tuned.
+    """
+
+    custom_dialog1 = Toplevel(root)
+    custom_dialog1.title("About Deregtext")
+    custom_dialog1.geometry("610x400")
+
+    label = Label(custom_dialog1, text=aboutdereg, justify=LEFT)
+    label.pack(padx=10, pady=10)
+
+    button = Button(custom_dialog1, text="OK", command=custom_dialog1.destroy)
+    button.pack(pady=10)
+
+def about_commands():
+    commands = """
+    Under the File Menu:
+    - 'New' clears the entire Text text_area
+    - 'Open' clears text and opens another file
+    - 'Save As' saves your file in the same / another extension
+
+    Under the Edit Menu:
+    - 'Copy' copies the selected text to your clipboard
+    - 'Cut' cuts the selected text and removes it from the text area
+    - 'Paste' pastes the copied/cut text
+    - 'Select All' selects the entire text
+    - 'Delete' deletes the last character
+    """
+
+    custom_dialog = Toplevel(root)
+    custom_dialog.title("All commands")
+    custom_dialog.geometry("610x500")
+
+    label = Label(custom_dialog, text=commands, justify=LEFT)
+    label.pack(padx=10, pady=10)
+
+    button = Button(custom_dialog, text="OK", command=custom_dialog.destroy)
+    button.pack(pady=10)
+
+
+def main():
+    """
+    Main is defined to allow remote execution of program.
+    This helps ensure that all necessary items are loaded
+    before the program can be executed, else, the executer
+    will error out.
+    """
+
+    global root, text_area
+
+    # Initializing the window to create python text editor
+    root = Tk()
+    root.title("Untitled - Deregtext")
+    root.geometry("1000x700")
+    root.resizable(TRUE, TRUE)
+
+    root.columnconfigure(0, weight=1)
+    root.rowconfigure(0, weight=1)
+
+    icon = ImageTk.PhotoImage(Image.open("media/img/Notepad.png"))
+    root.iconphoto(False, icon)
+
+    # Create the context menu
+    context_menu = Menu(root, tearoff=0)
+    context_menu.add_command(label="Copy", command=copy_text)
+    context_menu.add_command(label="Cut", command=cut_text)
+    context_menu.add_command(label="Paste", command=paste_text)
+    context_menu.add_separator()
+    context_menu.add_command(label="Select All", command=select_all)
+    context_menu.add_command(label="Delete", command=delete_last_char)
+
+    def show_context_menu(event):
+        context_menu.post(event.x_root, event.y_root)
+
+    def hide_context_menu(event):
+        context_menu.unpost()
+
+    # Create the menu bar
+    menu_bar = Menu(root)
+
+    # Adding the File Menu and its components to create Python Text Editor
+    file_menu = Menu(menu_bar, tearoff=False, activebackground="DodgerBlue")
+
+    file_menu.add_command(label="New", command=open_new_file)
+    file_menu.add_command(label="Open File", command=open_file)
+    file_menu.add_command(label="Save As", command=save_file)
+    file_menu.add_separator()
+    file_menu.add_command(label="Close File", command=exit_application)
+
+    menu_bar.add_cascade(label="File", menu=file_menu)
+
+    # Adding the Edit Menu and its components
+    edit_menu = Menu(menu_bar, tearoff=False, activebackground="DodgerBlue")
+
+    edit_menu.add_command(label="Copy", command=copy_text)
+    edit_menu.add_command(label="Cut", command=cut_text)
+    edit_menu.add_command(label="Paste", command=paste_text)
+    edit_menu.add_separator()
+    edit_menu.add_command(label="Select All", command=select_all)
+    edit_menu.add_command(label="Delete", command=delete_last_char)
+
+    menu_bar.add_cascade(label="Edit", menu=edit_menu)
+
+    # Adding the Help Menu and its components
+    help_menu = Menu(menu_bar, tearoff=False, activebackground="DodgerBlue")
+
+    help_menu.add_command(label="About Deregtext", command=about_deregtext)
+    help_menu.add_command(label="About Commands", command=about_commands)
+
+    menu_bar.add_cascade(label="Help", menu=help_menu)
+
+    root.config(menu=menu_bar)
+
+    # Setting the basic components of the window
+    text_area = Text(root, font=("Times New Roman", 12))
+    text_area.grid(sticky=NSEW)
+
+    scroller = Scrollbar(text_area, orient=VERTICAL)
+    scroller.pack(side=RIGHT, fill=Y)
+
+    scroller.config(command=text_area.yview)
+    text_area.config(yscrollcommand=scroller.set)
+
+    # Bind the select_all function to a keyboard shortcut (Ctrl+A)
+    root.bind('<Control-a>', select_all)
+
+    # Bind the right-click event to show the context menu
+    text_area.bind("<Button-3>", show_context_menu)
+
+    # Bind the left-click event to hide the context menu
+    text_area.bind("<Button-1>", hide_context_menu)
+
+    # Give the text area focus when the application starts
+    text_area.focus_set()
+
+    # Finalizing the window
+    # root.update()
+    root.mainloop()
+
+if __name__ == "__main__":
+    main()