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Python - Stop turtle from leaving canvas
Calling an external command in PythonWhat are metaclasses in Python?Finding the index of an item given a list containing it in PythonDifference between append vs. extend list methods in PythonHow can I safely create a nested directory in Python?Does Python have a ternary conditional operator?How to get the current time in PythonHow can I make a time delay in Python?How to leave/exit/deactivate a python virtualenv?Does Python have a string 'contains' substring method?
I am making a program using tkinter. I have a canvas and a turtle inside of the canvas. Currently, the turtle moves around the screen using the arrow keys, however I want it to not be able to leave the boundaries of the canvas. Here is my current code
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_forward_keys(_):
t.forward(10)
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(10)
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
It may be because I am doing something wrong, but this is my code at the moment. Which I think should work because if it leaves, it should undo its last action.
Thanks
python canvas turtle-graphics
asked Mar 8 at 1:48
Ben BriddonBen Briddon
83
add a comment |
I am making a program using tkinter. I have a canvas and a turtle inside of the canvas. Currently, the turtle moves around the screen using the arrow keys, however I want it to not be able to leave the boundaries of the canvas. Here is my current code
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_forward_keys(_):
t.forward(10)
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(10)
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
It may be because I am doing something wrong, but this is my code at the moment. Which I think should work because if it leaves, it should undo its last action.
Thanks
python canvas turtle-graphics
asked Mar 8 at 1:48
Ben BriddonBen Briddon
83
add a comment |
I am making a program using tkinter. I have a canvas and a turtle inside of the canvas. Currently, the turtle moves around the screen using the arrow keys, however I want it to not be able to leave the boundaries of the canvas. Here is my current code
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_forward_keys(_):
t.forward(10)
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(10)
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
It may be because I am doing something wrong, but this is my code at the moment. Which I think should work because if it leaves, it should undo its last action.
Thanks
python canvas turtle-graphics
asked Mar 8 at 1:48
Ben BriddonBen Briddon
83
I am making a program using tkinter. I have a canvas and a turtle inside of the canvas. Currently, the turtle moves around the screen using the arrow keys, however I want it to not be able to leave the boundaries of the canvas. Here is my current code
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_forward_keys(_):
t.forward(10)
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(10)
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
It may be because I am doing something wrong, but this is my code at the moment. Which I think should work because if it leaves, it should undo its last action.
Thanks
python canvas turtle-graphics
python canvas turtle-graphics
asked Mar 8 at 1:48
Ben BriddonBen Briddon
83
asked Mar 8 at 1:48
Ben BriddonBen Briddon
83
asked Mar 8 at 1:48
Ben BriddonBen Briddon
83
asked Mar 8 at 1:48
Ben BriddonBen Briddon
83
asked Mar 8 at 1:48
Ben BriddonBen Briddon
83
83
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
The problem is that this code:
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
is at the top level of your file when it should be embedded in the move_forward_keys() and move_back_keys() functions:
CURSOR_OFFSET = 6 # cursor hotspot closer to front than back
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
def move_forward_keys(_):
t.forward(9)
tx, ty = t.position()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(9)
tx, ty = t.position()
if tx > right_bound - CURSOR_OFFSET or tx < CURSOR_OFFSET + left_bound:
t.undo()
if ty > top_bound - CURSOR_OFFSET or ty < CURSOR_OFFSET + bottom_bound:
t.undo()
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
answered Mar 8 at 6:51
cdlanecdlane
19.5k21145
add a comment |
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1 Answer
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oldest
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1 Answer
1
active
oldest
votes
active
oldest
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active
oldest
votes
The problem is that this code:
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
is at the top level of your file when it should be embedded in the move_forward_keys() and move_back_keys() functions:
CURSOR_OFFSET = 6 # cursor hotspot closer to front than back
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
def move_forward_keys(_):
t.forward(9)
tx, ty = t.position()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(9)
tx, ty = t.position()
if tx > right_bound - CURSOR_OFFSET or tx < CURSOR_OFFSET + left_bound:
t.undo()
if ty > top_bound - CURSOR_OFFSET or ty < CURSOR_OFFSET + bottom_bound:
t.undo()
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
answered Mar 8 at 6:51
cdlanecdlane
19.5k21145
add a comment |
The problem is that this code:
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
is at the top level of your file when it should be embedded in the move_forward_keys() and move_back_keys() functions:
CURSOR_OFFSET = 6 # cursor hotspot closer to front than back
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
def move_forward_keys(_):
t.forward(9)
tx, ty = t.position()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(9)
tx, ty = t.position()
if tx > right_bound - CURSOR_OFFSET or tx < CURSOR_OFFSET + left_bound:
t.undo()
if ty > top_bound - CURSOR_OFFSET or ty < CURSOR_OFFSET + bottom_bound:
t.undo()
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
answered Mar 8 at 6:51
cdlanecdlane
19.5k21145
add a comment |
The problem is that this code:
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
is at the top level of your file when it should be embedded in the move_forward_keys() and move_back_keys() functions:
CURSOR_OFFSET = 6 # cursor hotspot closer to front than back
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
def move_forward_keys(_):
t.forward(9)
tx, ty = t.position()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(9)
tx, ty = t.position()
if tx > right_bound - CURSOR_OFFSET or tx < CURSOR_OFFSET + left_bound:
t.undo()
if ty > top_bound - CURSOR_OFFSET or ty < CURSOR_OFFSET + bottom_bound:
t.undo()
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
answered Mar 8 at 6:51
cdlanecdlane
19.5k21145
The problem is that this code:
tx = t.xcor()
ty = t.ycor()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
is at the top level of your file when it should be embedded in the move_forward_keys() and move_back_keys() functions:
CURSOR_OFFSET = 6 # cursor hotspot closer to front than back
canvas = Tk.Canvas(master=self, width=300, height=300)
canvas.grid(row=2, column=2, columnspan=3, padx=50)
canvas.focus_set()
t = turtle.RawTurtle(canvas)
t.setheading(90)
left_bound = -(canvas.winfo_width() / 2)
right_bound = canvas.winfo_width() / 2
top_bound = canvas.winfo_height() / 2
bottom_bound = -(canvas.winfo_height() / 2)
def move_forward_keys(_):
t.forward(9)
tx, ty = t.position()
if tx > right_bound or tx < left_bound:
t.undo()
if ty > top_bound or ty < bottom_bound:
t.undo()
def move_left_keys(_):
t.left(20)
def move_right_keys(_):
t.right(20)
def move_back_keys(_):
t.back(9)
tx, ty = t.position()
if tx > right_bound - CURSOR_OFFSET or tx < CURSOR_OFFSET + left_bound:
t.undo()
if ty > top_bound - CURSOR_OFFSET or ty < CURSOR_OFFSET + bottom_bound:
t.undo()
canvas.bind("<Up>", move_forward_keys)
canvas.bind("<Left>", move_left_keys)
canvas.bind("<Right>", move_right_keys)
canvas.bind("<Down>", move_back_keys)
answered Mar 8 at 6:51
cdlanecdlane
19.5k21145
edited Mar 8 at 7:07
answered Mar 8 at 6:51
cdlanecdlane
19.5k21145
answered Mar 8 at 6:51
cdlanecdlane
19.5k21145
answered Mar 8 at 6:51
cdlanecdlane
19.5k21145
19.5k21145
add a comment |
add a comment |
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