Updating Tkinter widget after function

Question

I am trying to update the widget frame when I add a new folder to the users directory, but I am unsure how to implement that function. This is what I have so far..

How I add the current directory folders in my main..

This is within my main script

        def add_image(row, col, folder):
            img = ImageTk.PhotoImage(fold_img)
            self.image_refs.append(img)
            
            imageLabel = Label(canvasFrame, image=img)
            imageLabel.grid(row=row, column=col, padx=5)
            
            nameLabel = Label(canvasFrame, text=folder, font=("Arial", 8), wraplength=100)
            nameLabel.grid(row=row , column=col)
            
            imageLabel.bind("<Button-1>", lambda event, name=folder: click(name))
    
        def add_folders():
            row = 0
            col = 0
            for folder in functions.folders:
                #print(f"added {folder} at {row} , {col}")
                add_image(row, col, folder)
                col += 1
                if col == 4:
                    row+= 1
                    col = 0
        
        add_folders()

How I create a new folder in the users directory.., I want the widget frame to update after this finishes

This is within my functions script

def new_folder(event):
    global cleaner
    cwd = os.getcwd()
    print(f" current: {cwd}")
    desktop = os.path.expanduser("~/Desktop")
    os.chdir(desktop)
    cwd = os.getcwd()
    print(f"new: {cwd}")
    
    name = simpledialog.askstring(title="new folder", prompt="enter folder name: ")
    
    try:
        os.makedirs(name)
        print(f"created {name}")
    except FileExistsError:
        print(f"there is folder named: {name}")
    except PermissionError:
        print(f"Permission denied: Unable to create '{name}'.")
    except Exception as e:
        print(f"An error occurred: {e}")

I am still new to this and hopefully this question makes sense.

run add_folders() directly after os.makedirs(...) (and first add cwd / name to functions.folders). But you would keep images or labels in global list to check if you already have this image(s) in widget - or delete all labels and create all again.. — furas
– furas, Commented Feb 27 at 11:45

acw1668 · Accepted Answer · 2025-02-27 13:01:21Z

Inside new_folder():

determine the row and column for the new folder label
call add_image() to add the new folder label
add the folder name to functions.folders (based on your code)

def new_folder(event):
    ...

    try:
        os.makedirs(name)
        # determine the row and column for the new folder label
        row, col = divmod(len(canvasFrame.grid_slaves()), 4)
        # add the folder label
        add_image(row, col, name)
        # add the folder name to functions.folders ???
        functions.folders.append(name)
        print(f"created {name}")
    except FileExistsError:
        ...
    ...

Note that:

you can use single label for showing the folder name and image instead of two labels
you have used same fold_img for all the folder labels inside add_image(), so you don't need to create new instance of ImageTk.PhotoImage() for each folder label, just create one globally and use it for all the folder labels.

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