YouTipPython Tk Canvas
# Python2.x Python Tkinter Canvas
[ Python GUI Programming](#)
The Python Tkinter Canvas component is similar to the canvas in HTML5, both are used for drawing. You can place graphics, text, widgets, or frames on the canvas.
### Syntax
The syntax format is as follows:
w = Canvas ( master, option=value, ... )
* master: The parent container of the button.
* options: Optional parameters, i.e., the settable properties of the button. These options can be set in the form key = value, separated by commas.
| No. | Option & Description |
| --- | --- |
| 1 | **bd** Border width in pixels, default is 2 pixels. |
| 2 | **bg** Background color |
| 3 | **confine** If true (default), the canvas cannot be scrolled beyond the scrollable region. |
| 4 | **cursor** Cursor shape setting, such as arrow, circle, cross, plus, etc. |
| 5 | **height** Height |
| 6 | **highlightcolor** Color to highlight |
| 7 | **relief** Border style, optional values are FLAT, SUNKEN, RAISED, GROOVE, RIDGE. Default is FLAT. |
| 8 | **scrollregion** A tuple (w, n, e, s) that defines the maximum scrollable area of the canvas, where w is left, n is top, e is right, s is bottom. |
| 9 | **width** The size of the canvas on the X-axis. |
| 10 | **xscrollincrement** The amount of horizontal scrolling for scroll requests. |
| 11 | **xscrollcommand** Horizontal scrollbar. If the canvas is scrollable, this attribute is the .set() method of the horizontal scrollbar. |
| 12 | **yscrollincrement** Similar to xscrollincrement, but for the vertical direction. |
| 13 | **yscrollcommand** Vertical scrollbar. If the canvas is scrollable, this attribute is the .set() method of the vertical scrollbar. |
**The Canvas component supports the following standard options:**
arc − Creates a sector
coord = 10, 50, 240, 210 arc = canvas.create_arc(coord, start=0, extent=150, fill="blue")
image − Creates an image
filename = PhotoImage(file = "sunshine.gif") image = canvas.create_image(50, 50, anchor=NE, image=filename)
line − Creates a line
line = canvas.create_line(x0, y0, x1, y1, ..., xn, yn, options)
oval − Creates a circle
oval = canvas.create_oval(x0, y0, x1, y1, options)
polygon − Creates a polygon with at least three vertices
oval = canvas.create_polygon(x0, y0, x1, y1,...xn, yn, options)
### Example
The example shows a message displayed when a button is clicked:
## Example
#!/usr/bin/python# -*- coding: UTF-8 -*-import Tkinter import tkMessageBox# -*- coding: cp936 -*-# Create a rectangle, set the canvas color to white from Tkinter import * root = Tk()# Create a Canvas, set its background color to white cv = Canvas(root,bg = 'white')# Create a rectangle with coordinates (10,10,110,110)cv.create_rectangle(10,10,110,110)cv.pack()root.mainloop()# For clarity, set the background color to white to distinguish from root top.mainloop()
The test output is as follows:
!(#)
[ Python GUI Programming](#)