Canvas class of Tkinter supports a functions which is used to move objects from one position to another in any canvas or tkinter toplevel.
Syntax: Canvas.move(canvas_object, x, y)
Parameters:
canvas_object is any valid image or drawing created with the help of Canvas class. To know how to create object using Canvas class take reference of this.
x is horizontal distance from upper-left corner.
y is vertical distance from upper-left corner.
We will use class to see the working of move() method.
Class parameters-
Data members used:
master
x
y
canvas
rectangleMember functions used:
movement()
left()
right()
up()
down()Widgets used: Canvas
Tkinter method used:
Canvas.create_rectangle()
pack()
Canvas.move()
after()
bind()
Below is the Python implementation:
# imports every file form tkinter and tkinter.ttkfrom 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() |
Output:
Extra print statements are used in above code to show the proper working of move() method. keysym keyword (Tkinter reserved) is used to print which keyboard key is pressed.
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