How to make a tkinter canvas rectangle transparent?
You can use transparent image to simulate the result. Use Pillow to create transparent image and then use canvas.create_image(...) to draw it. Below is a sample code:
from tkinter import *from PIL import Image, ImageTkroot = Tk()images = [] # to hold the newly created imagedef create_rectangle(x1, y1, x2, y2, **kwargs): if 'alpha' in kwargs: alpha = int(kwargs.pop('alpha') * 255) fill = kwargs.pop('fill') fill = root.winfo_rgb(fill) + (alpha,) image = Image.new('RGBA', (x2-x1, y2-y1), fill) images.append(ImageTk.PhotoImage(image)) canvas.create_image(x1, y1, image=images[-1], anchor='nw') canvas.create_rectangle(x1, y1, x2, y2, **kwargs)canvas = Canvas(width=300, height=200)canvas.pack()create_rectangle(10, 10, 200, 100, fill='blue')create_rectangle(50, 50, 250, 150, fill='green', alpha=.5)create_rectangle(80, 80, 150, 120, fill='#800000', alpha=.8)root.mainloop()And the output:
In a canvas if you want some widget to be transparent, simply let the fill parameter be empty:
fill=""