Learn to Program 23
In part 21 of my Learn to Program series I made all of the parts of a simple text editor except for the part where you enter text! So, in this video we’ll create a dialog for opening files, create a dialog for saving files, add a text widget with a scrollbar widget, add a menu for review and much more. For homework after completing this program add in the parts from part 21 for more functionality.
All of the code and a transcript follows the video below.
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Code & Transcript
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from tkinter import * import tkinter.filedialog class TextEditor: # Quits the TkInter app when called @staticmethod def quit_app(event=None): root.quit() def open_file(self, event=None): txt_file = tkinter.filedialog.askopenfilename(parent=root, initialdir='/Users/derekbanas/PycharmProjects') if txt_file: self.text_area.delete(1.0, END) # Open file and put text in the text widget with open(txt_file) as _file: self.text_area.insert(1.0, _file.read()) # Update the text widget root.update_idletasks() def save_file(self, event=None): # Opens the save as dialog box file = tkinter.filedialog.asksaveasfile(mode='w') if file != None: # Get text in the text widget and delete the last newline data = self.text_area.get('1.0', END + '-1c') # Write the text and close file.write(data) file.close() def __init__(self, root): self.text_to_write = "" # Define title for the app root.title("Text Editor") # Defines the width and height of the window root.geometry("600x550") frame = Frame(root, width=600, height=550) # Create the scrollbar scrollbar = Scrollbar(frame) # yscrollcommand connects the scroll bar to the text # area self.text_area = Text(frame, width=600, height=550, yscrollcommand=scrollbar.set, padx=10, pady=10) # Call yview when the scrollbar is moved scrollbar.config(command=self.text_area.yview) # Put scroll bar on the right and fill in the Y direction scrollbar.pack(side="right", fill="y") # Pack on the left and fill available space self.text_area.pack(side="left", fill="both", expand=True) frame.pack() # Create the menu object the_menu = Menu(root) # Create a pull down menu that can't be removed file_menu = Menu(the_menu, tearoff=0) # Add items to the menu that show when clicked # compound allows you to add an image file_menu.add_command(label="Open", command=self.open_file) file_menu.add_command(label="Save", command=self.save_file) # Add a horizontal bar to group similar commands file_menu.add_separator() # Call for the function to execute when clicked file_menu.add_command(label="Quit", command=self.quit_app) # Add the pull down menu to the menu bar the_menu.add_cascade(label="File", menu=file_menu) # Display the menu bar root.config(menu=the_menu) root = Tk() text_editor = TextEditor(root) root.mainloop() |
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