Canvas Tkinter | Python 3

In this tutorial, we are going to see how to use Canvas in Tkinter. Canvas is a rectangular area for drawing images or other complex shapes. You can put graphics, text, widgets or frames on a Canvas.
 

Syntax:

Here is the syntax to create this widget:

c = Canvas ( master, option = value, ... )

 
 

Parameters:

• master : This represents the parent window.
• options : See below for a list of the most commonly used options for this widget. These options can be used as comma separated key-value pairs.

 

Example :

from tkinter import *

master = Tk()

w = Canvas(master, width=200, height=100)
w.pack()

w.create_line(0, 0, 200, 100, fill="red", dash=(4, 4))
w.create_line(0, 100, 200, 0)

w.create_rectangle(55, 30, 140, 70, fill="red")

mainloop()

Output:

 
 

Canvas widget options

Option	Description
confine	If true (default), the Canvas cannot scroll outside the scroll region.
cursor	Cursor used in the Canvas as an arrow, circle, point, etc.
bd	Border width in pixels. The default value is 2.
bg	Bbackground color.
height	Canvas size in Y dimension.
scrollregion	A tuple (w, n, e, s) that defines the scrolling area of the Canvas, where w is the left side, n is the top, e is the right side and s is the bottom.
width	Canvas size in X dimension.
highlightcolor	The color of the focus when the widget has the focus.
relief	Relief indicates the type of border. Some of the values are SUNKEN, RAISED, GROOVE and RIDGE.

The Canvas widget can support the following standard elements:

Arc: Create an arc.

coord = 15, 20, 200, 200
arc = w.create_arc(coord, start=0, extent=180, fill="red")

 
 
Image : Show an image on the Canvas.

from tkinter import *

canvas = Canvas(width=300, height=200, bg='black')
canvas.pack(expand=YES, fill=BOTH)

# load the .gif image file
gif1 = PhotoImage(file='python.gif')

# put the image on the canvas
canvas.create_image(50, 10, image=gif1, anchor=NW)
mainloop()

Output:

Line : Create a line.

line = canvas.create_line(x0, y0, x1, y1, options)

 
Oval : Creates a circle or ellipse with the given coordinates. Two pairs of coordinates are required; the upper left and lower right corners of the oval.

oval = canvas.create_oval(x0, y0, x1, y1, options)

 
Polygon : Create a polygon that must have at least three corners.

polygon = canvas.create_polygon(x0, y0, x1, y1, options)

 
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