I want to have the program check if a mouse click is on a turtle. Like every time the user clicks the program checks if there is a turtle there (Like selecting pieces in a game, you click on the screen and if the click is on a piece, aka turtle, you select it. If not, nothing happens)
Add a comment
|
2 Answers
You have function turtle.onclick(my_function) which runs my_function only when you click turtle. If you click outside turtle, then it doesn't run my_function
If you have many turtles then you can use it to assign different functions to different turtles.
Doc: onclick
Comments
In addition to onclick there's distance. This is useful for finding all of the turtles near a click (potentially expensive if you loop over all turtles) and handling multiple turtles that are stacked on top of each other.
onclick example:
from turtle import Screen, Turtle
def make_turtle(x, y):
t = Turtle()
def handle_click(x, y):
t.color("red")
print(x, y)
t.onclick(handle_click)
t.penup()
t.shape("square")
t.shapesize(.9, .9)
t.goto(x * grid_size, y * grid_size)
t.pendown()
grid_size = 20
Screen().tracer(0)
for x in range(-10, 10):
for y in range(-10, 10):
make_turtle(x, y)
Screen().tracer(1)
Screen().mainloop()
distance example (tweak constants to adjust behavior):
from turtle import Screen, Turtle
def handle_click(x, y):
print(x, y)
for t in turtles:
if t.distance(x, y) < 25:
t.color("red")
def make_turtle(x, y):
t = Turtle()
turtles.append(t)
t.penup()
t.shape("square")
t.shapesize(1.5, 1.5)
t.goto(x * grid_size, y * grid_size)
t.pendown()
grid_size = 60
Screen().tracer(0)
turtles = []
for x in range(-5, 5):
for y in range(-5, 5):
make_turtle(x, y)
Screen().onclick(handle_click)
Screen().tracer(1)
Screen().mainloop()