Applied Programming/GUI/Python3
< Applied Programming | GUI
gui.py edit
"""This program demonstrates Python GUI using tkinter and saving text as HTML pages.
Input:
Text window
Output:
HTML file
Global variables:
root (tkinter.root): top-level window
scrolledtext (tkinter.scrolledtext): window scrolled-textbox
References:
https://www.tutorialspoint.com/python/python_gui_programming.htm
https://www.python-course.eu/python_tkinter.php
https://wiki.python.org/moin/EscapingHtml
"""
import html
import tkinter.filedialog
import tkinter.scrolledtext
import webbrowser
root = None
scrolledtext = None
def create_root():
"""Creates top-level window.
Args:
None
Returns:
None
Modifies:
global root
"""
global root
root = tkinter.Tk()
root.title("Python GUI Example")
root.geometry("%dx%d+0+0" % root.maxsize())
def text_to_html(title, text):
"""Converts given text to HTML with the given page title.
HTML text is escaped (< = < > = >, etc.)
Args:
title (string): The title of the web page
text (string): The text to be converted
Returns:
string: The converted text
"""
text = html.escape(text, False)
text = text.replace("\n", "<br>\n")
text = "<!DOCTYPE html>\n<html>\n<head>\n<meta charset=""UTF-8"">\n" + \
("<title>%s</title>\n</head>\n<body>\n" % title) + \
text + \
"</body>\n</html>"
return text
def save_file():
"""Saves the current scrolledtext to root.filename.
Args:
None
Returns:
None
Accesses:
global root, scrolledtext
"""
global root, scrolledtext
title = "HTML Example"
text = scrolledtext.get(1.0, tkinter.END)
text = text_to_html(title, text)
try:
with open(root.filename, "w") as file:
file.write(text)
except Exception as exception:
print(exception)
def save_as():
"""Displays a Save As dialog box and calls save_file if successful.
Args:
None
Returns:
None
Modifies:
global root
"""
global root
root.filename = tkinter.filedialog.asksaveasfilename(
defaultextension=".html",
filetypes = (("HTML","*.html"),("all files","*.*")),
initialdir = ".",
title = "Save As")
if root.filename != "":
save_file()
def add_menu():
"""Adds the menu bar to the top-level window.
Args:
None
Returns:
None
Modifies:
global root
"""
global root
main_menu = tkinter.Menu(root)
file_menu = tkinter.Menu(main_menu, tearoff=0)
file_menu.add_command(label="Save As...", command=save_as)
file_menu.add_separator()
file_menu.add_command(label="Exit", command=root.quit)
main_menu.add_cascade(label="File", menu=file_menu)
root.config(menu=main_menu)
def add_textbox():
"""Adds the scrolled textbox to the top-level window.
Args:
None
Returns:
None
Modifies:
global root
"""
global root, scrolledtext
scrolledtext = tkinter.scrolledtext.ScrolledText(root)
scrolledtext.pack(fill="both", expand=True)
text = \
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do " \
"eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim " \
"ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut " \
"aliquip ex ea commodo consequat. Duis aute irure dolor in " \
"reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla " \
"pariatur. Excepteur sint occaecat cupidatat non proident, sunt in " \
"culpa qui officia deserunt mollit anim id est laborum."
scrolledtext.insert(tkinter.INSERT, text)
def main():
"""Runs the main program logic."""
create_root()
add_menu()
add_textbox()
root.mainloop()
main()
Try It edit
Copy and paste the code above into one of the following free online development environments or use your own Python3 compiler / interpreter / IDE.