Python Tkinter使用Canvas.move()方法移动对象

帆布类Tkinter支持的功能是在任何画布或tkinter顶层将对象从一个位置移动到另一位置。

语法：Canvas.move(canvas_object, x, y)
参数：canvas_object是在Canvas类的帮助下创建的任何有效图像或图形。要知道如何使用Canvas类创建对象, 请参考此内容。
x是到左上角的水平距离。
y是距左上角的垂直距离。

我们将使用类来查看移动()方法。

类参数

使用的数据成员：主xy canvas矩形使用的成员函数：
Movement()left()right()up()down()使用的小部件：Canvas
Tkinter使用的方法：Canvas.create_rectangle()pack()Canvas.move()after( )bind()

以下是Python实现：

# imports every file form tkinter and tkinter.ttk
from tkinter import *
from tkinter.ttk import * 
  
class GFG:
     def __init__( self , master = None ):
         self .master = master
          
         # to take care movement in x direction
         self .x = 1
         # to take care movement in y direction
         self .y = 0
  
         # canvas object to create shape
         self .canvas = Canvas(master)
         # creating rectangle
         self .rectangle = self .canvas.create_rectangle(
                          5 , 5 , 25 , 25 , fill = "black" )
         self .canvas.pack()
  
         # calling class's movement method to 
         # move the rectangle
         self .movement()
      
     def movement( self ):
  
         # This is where the move() method is called
         # This moves the rectangle to x, y coordinates
         self .canvas.move( self .rectangle, self .x, self .y)
  
         self .canvas.after( 100 , self .movement)
      
     # for motion in negative x direction
     def left( self , event):
         print (event.keysym)
         self .x = - 5
         self .y = 0
      
     # for motion in positive x direction
     def right( self , event):
         print (event.keysym)
         self .x = 5
         self .y = 0
      
     # for motion in positive y direction
     def up( self , event):
         print (event.keysym)
         self .x = 0
         self .y = - 5
      
     # for motion in negative y direction
     def down( self , event):
         print (event.keysym)
         self .x = 0
         self .y = 5
  
if __name__ = = "__main__" :
  
     # object of class Tk, resposible for creating
     # a tkinter toplevel window
     master = Tk()
     gfg = GFG(master)
  
     # This will bind arrow keys to the tkinter
     # toplevel which will navigate the image or drawing
     master.bind( "<KeyPress-Left>" , lambda e: gfg.left(e))
     master.bind( "<KeyPress-Right>" , lambda e: gfg.right(e))
     master.bind( "<KeyPress-Up>" , lambda e: gfg.up(e))
     master.bind( "<KeyPress-Down>" , lambda e: gfg.down(e))
      
     # Infnite loop breaks only by interrupt
     mainloop()

输出如下：

上面的代码中使用了额外的打印语句, 以显示移动()方法。键盘关键字(保留Tkinter)用于打印按下了哪个键盘键。

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。