Checkbutton starts with a gray background

[Anonymous]

I have attached two images, one before and one after.
What happens is: I have a lot of checkbuttons on a screen. When I run the program, the checkbuttons are not white, but they always start gray. If I click them, they behave normally, being white squared confirmed or white square unconfirmed. I don't know why the white square turns gray when I run the program. I would like to have it always as a normal white square, as I see it on the PAGE constructor screen.

Why does it change when I run the program? How can I avoid that?

[Greg Walters]

When you use a checkbutton or a series of radio buttons, you should "initialize" them with a value before the program starts.
I usually do this in the 'init' function if there are only a few of them. Otherwise I create a function that I call something like 'def setup_buttons():' that handles this called from the init function.

Let's say that you have 3 checkbuttons that you want to set. We'll demonstrate using the setup function. Further, assume that the checkbuttons have the variable attributes set to chk1, chk2 and chk3.

def setup_buttons():
    chk1.set('0')  # set to empty or not checked
    chk2.set('1')  # set to checked
    chk3.set('0')  # set to not checked

def init():
    #This function is provided by Page and is the last thing that is run before the form is shown to the user.
    global w, top_level, root
    w = gui
    top_level = top
    root = top
    # Your code here....
    setup_buttons()
    ...

I hope this helps.

Greg

[Anonymous]

Thanks, it is working as intended now!

[Greg Walters]

I'm glad I was able to help.

Greg