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clicking on turtle
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pyt...@graner.name
Nov 6, 2012, 4:13:21 PM11/6/12
to pytho...@python.org
I have a problem with the standard "turtle" module. When a turtle has
a custom shape of type "compound", it doesn't seem to respond to click
events. No problem with polygon shapes.
Running python 3.2.3, turtle version 1.1b on Windows XP.
Here is my test file:
##################################################
import turtle
square = ((0,0),(0,20),(20,20),(20,0))
turtle.addshape("sq1", square) # sq1 = polygon shape
s = turtle.Shape("compound")
s.addcomponent(square, "red")
turtle.addshape("sq2", s) # sq2 = compound shape
t1 = turtle.Turtle(shape="sq1")
t2 = turtle.Turtle(shape="sq2")
t2.fd(20) # set the turtles side by side
def click(x,y): print("click at",x,y)
t1.onclick(click)
t2.onclick(click)
turtle.mainloop()
##################################################
When I run this and click on the black square (i.e. t1), the message
"click at..." gets printed on the console. When I click on the red
square (i.e. t2), nothing happens.
Bug or feature?
--Nicolas
a custom shape of type "compound", it doesn't seem to respond to click
events. No problem with polygon shapes.
Running python 3.2.3, turtle version 1.1b on Windows XP.
Here is my test file:
##################################################
import turtle
square = ((0,0),(0,20),(20,20),(20,0))
turtle.addshape("sq1", square) # sq1 = polygon shape
s = turtle.Shape("compound")
s.addcomponent(square, "red")
turtle.addshape("sq2", s) # sq2 = compound shape
t1 = turtle.Turtle(shape="sq1")
t2 = turtle.Turtle(shape="sq2")
t2.fd(20) # set the turtles side by side
def click(x,y): print("click at",x,y)
t1.onclick(click)
t2.onclick(click)
turtle.mainloop()
##################################################
When I run this and click on the black square (i.e. t1), the message
"click at..." gets printed on the console. When I click on the red
square (i.e. t2), nothing happens.
Bug or feature?
--Nicolas
Nicolas Graner
Nov 6, 2012, 4:09:18 PM11/6/12
to pytho...@python.org
Steven D'Aprano
Nov 6, 2012, 6:20:25 PM11/6/12
to
On Tue, 06 Nov 2012 22:13:21 +0100, python wrote:
> I have a problem with the standard "turtle" module. When a turtle has a
> custom shape of type "compound", it doesn't seem to respond to click
> events. No problem with polygon shapes.
[...]
> I have a problem with the standard "turtle" module. When a turtle has a
> custom shape of type "compound", it doesn't seem to respond to click
> events. No problem with polygon shapes.
> When I run this and click on the black square (i.e. t1), the message
> "click at..." gets printed on the console. When I click on the red
> square (i.e. t2), nothing happens.
I don't know enough about turtle graphics to tell whether it's a bug in
> "click at..." gets printed on the console. When I click on the red
> square (i.e. t2), nothing happens.
your code, or a bug in the turtle, but I can confirm that the same
behaviour occurs in Python 2.7 on Linux.
--
Steven
Peter Otten
Nov 7, 2012, 7:54:05 AM11/7/12
to pytho...@python.org
Nicolas Graner wrote:
> I have a problem with the standard "turtle" module. When a turtle has
> a custom shape of type "compound", it doesn't seem to respond to click
> events. No problem with polygon shapes.
>
> I have a problem with the standard "turtle" module. When a turtle has
> a custom shape of type "compound", it doesn't seem to respond to click
> events. No problem with polygon shapes.
>
> Running python 3.2.3, turtle version 1.1b on Windows XP.
>
> Here is my test file:
>
> ##################################################
> import turtle
> square = ((0,0),(0,20),(20,20),(20,0))
> turtle.addshape("sq1", square) # sq1 = polygon shape
> s = turtle.Shape("compound")
> s.addcomponent(square, "red")
> turtle.addshape("sq2", s) # sq2 = compound shape
> t1 = turtle.Turtle(shape="sq1")
> t2 = turtle.Turtle(shape="sq2")
> t2.fd(20) # set the turtles side by side
> def click(x,y): print("click at",x,y)
> t1.onclick(click)
> t2.onclick(click)
> turtle.mainloop()
> ##################################################
>
>
> Here is my test file:
>
> ##################################################
> import turtle
> square = ((0,0),(0,20),(20,20),(20,0))
> turtle.addshape("sq1", square) # sq1 = polygon shape
> s = turtle.Shape("compound")
> s.addcomponent(square, "red")
> turtle.addshape("sq2", s) # sq2 = compound shape
> t1 = turtle.Turtle(shape="sq1")
> t2 = turtle.Turtle(shape="sq2")
> t2.fd(20) # set the turtles side by side
> def click(x,y): print("click at",x,y)
> t1.onclick(click)
> t2.onclick(click)
> turtle.mainloop()
> ##################################################
>
> When I run this and click on the black square (i.e. t1), the message
> "click at..." gets printed on the console. When I click on the red
> square (i.e. t2), nothing happens.
>
> Bug or feature?
> "click at..." gets printed on the console. When I click on the red
> square (i.e. t2), nothing happens.
>
I believe it's a bug. Please report it on http://bugs.python.org
As a quick-fix here's a monkey patch that seems to work:
import turtle
def _onclick(self, item, fun, num=1, add=None):
if isinstance(item, list):
for item in item:
self._onclick(item, fun, num, add)
return
if fun is None:
self.cv.tag_unbind(item, "<Button-%s>" % num)
else:
def eventfun(event):
x, y = (self.cv.canvasx(event.x)/self.xscale,
-self.cv.canvasy(event.y)/self.yscale)
fun(x, y)
self.cv.tag_bind(item, "<Button-%s>" % num, eventfun, add)
turtle.TurtleScreenBase._onclick = _onclick
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