[Tkinter-discuss] Transparent backgrounds in widgets?

[Michael Lange]

Hi,

Thus spoketh Wayne Werner <waynejwerner at gmail.com> 
unto us on Tue, 21 Dec 2010 15:04:49 -0600:

> Hi,
> 
> Is it possible to create say, a checkbutton widget with a transparent
> background? I'm trying to take an image and put some checkbuttons on it
> so I can mark certain locations (like on a map). I'll be using the
> canvas widget and placing the checkbuttons on the canvas, but when I do
> they have the horrid background. I can change the color of the
> background, but I would much prefer having a transparent one.
> 
> Is this possible to do with the standard widgets or do I have to roll my
> own?
> 

I don't think there is support for background transparency in Tk.
The best bet is probably to try something like this:


from Tkinter import *
root = Tk()
img_off = PhotoImage(
    data='R0lGODlhFQANAKEAAJaWlu/v7////////yH5BAEAAAMALAAAAAAVAA0AAAIyhI8Ww80Jw3LNiI'
        'uxpBXkv3GD9WkTR5ZCiHrqelJpycquWjszGOs33etIhsRcpYgMMgoAOw==')
img_on = PhotoImage(
    data='R0lGODlhFQANAMIAAJaWlu/v7////wAAAP///////////////yH5BAEAAAQALAAAAAAVAA0AAANACLq'
    'sQTDCRsOTUYnNucUZIAwDRwofSGhk2aIXqI1tCauruL1bKus1mw/DOr2GkqKphAx1ns0JwEKtRlfWbAyTAAA7')
c = Checkbutton(root, indicatoron=False, image=img_off,
selectimage=img_on, bd=0, selectcolor='', width=12, height=12)
c.pack(padx=100, pady=100)
root.mainloop()

If you need text next to the checkbutton, you can create a canvas text
element, instead of using the checkbutton's text option.


Regards

Michael

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