It is possible to improve this example by adding some basic validations, such as verifying that users cannot drop an item outside of the canvas visible area.

To implement this, you can use the patterns we have covered in previous recipes to calculate the canvas width and height and verify that the final position of the item is inside a valid range by chaining the comparison operators. You can use the structure shown in the following snippet as a template:

final_x, final_y = pos_x + off_x, pos_y + off_y
if 0 <= final_x <= canvas_width and 0 <= final_y <= canvas_height:
     canvas.move(item, off_x, off_y)