Python Tkinter使用Canvas类创建不同类型的线

在Tkinter, Canvas.create_line()方法用于在任何画布中创建线条。这些行只能在画布上看到, 因此首先需要创建一个Canvas对象, 然后将其打包到主窗口中。

语法如下：

Canvas.create_line(x1, y1, x2, y2, ...., options = ...)

注意：创建一条线至少需要4个点, 但是你也可以添加多个点来创建不同的图形。

类参数–

使用的数据成员：主画布用于给定类的成员函数：create()方法使用的小部件：Canvas Tkinter使用的方法：canvas.create_line()pack()title()geometry()

以下是Python代码–

# Imports each and every method and class 
# of module tkinter and tkinter.ttk
from tkinter import *
from tkinter.ttk import * 
  
class GFG:
     def __init__( self , master = None ):
         self .master = master
  
         # Calls create method of class GFG
         self .create()
  
     def create( self ):
  
         # This creates a object of class canvas
         self .canvas = Canvas( self .master)
  
         # This creates a line of length 200 (straight horizontal line)
         self .canvas.create_line( 15 , 25 , 200 , 25 )
  
         # This creates a lines of 300 (straight vertical dashed line)
         self .canvas.create_line( 300 , 35 , 300 , 200 , dash = ( 5 , 2 ))
          
         # This creates a triangle (triangle can be created by other methods also)
         self .canvas.create_line( 55 , 85 , 155 , 85 , 105 , 180 , 55 , 85 )
          
         # This pack the canvas to the main window and make it expandable
         self .canvas.pack(fill = BOTH, expand = True )
  
if __name__ = = "__main__" :
      
     # object of class Tk, resposible for creating
     # a tkinter toplevel window
     master = Tk()
     geeks = GFG(master)
  
     # This sets the title to Lines
     master.title( "Lines" )
  
     # This sets the geometry and position of window
     # on the screen
     master.geometry( "400x250 + 300 + 300" )
  
     # Infnite loop breaks only by interrupt
     master.mainloop()

输出如下：

首先, 你的面试准备可通过以下方式增强你的数据结构概念：Python DS课程。