The turtle module provides turtle graphics primitives, in both object-oriented and procedure-oriented ways. Because it uses tkinter for the underlying graphics, it needs a version of Python installed with Tk support.
turtle.ondrag()
This function is used to bind fun to mouse-move event on this turtle on canvas.
Syntax : turtle.ondrag(fun, btn, add)
Parameters :
- fun : a function with two arguments, to which will be assigned the coordinates of the clicked point on the canvas
- btn : number of the mouse-button defaults to 1 (left mouse button)
- add : True or False. If True, new binding will be added, otherwise it will replace a former binding
Below is the implementation of the above method with an example :
Example :
# importing package import turtle # method to call on drag def fxn(x, y): # stop backtracking turtle.ondrag(None) # move the turtle's angle and direction # towards x and y turtle.setheading(turtle.towards(x, y)) # go to x, y turtle.goto(x, y) # call again turtle.ondrag(fxn) # set turtle speed turtle.speed(10) # make turtle screen object sc = turtle.Screen() # set screen size sc.setup(400, 300) # call fxn on drag turtle.ondrag(fxn) # take screen in mainloop sc.mainloop() |
Output :
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