Bugs item #1602742, was opened at 2006-11-25 16:27
Message generated for change (Comment added) made by mkiever
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Category: Tkinter
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Wojciech Mula (wmula)
Assigned to: Martin v. Löwis (loewis)
Summary: itemconfigure returns incorrect text property of text items
Initial Comment:
Tkinter: canvas itemconfigure bug
Consider following code:
-- tkbug.py ---
from Tkinter import *
root = Tk()
canvas = Canvas(root)
text = "sample text with spaces"
id = canvas.create_text(0, 0, text=text)
text2 = canvas.itemconfigure(id)['text'][-1]
print text
print text2
--- eof ---
This toy prints:
sample text with spaces
('sample', 'text', 'with', 'spaces')
The returned value is not a string -- Tk returns the same
string as passed on creating item, but Tkinter split it.
To fix this problem, internal method '_configure' have
to be changed a bit:
*** Tkinter.py.old 2006-11-20 16:48:27.000000000 +0100
--- Tkinter.py 2006-11-20 17:00:13.000000000 +0100
***************
*** 1122,1129 ****
cnf = _cnfmerge(cnf)
if cnf is None:
cnf = {}
! for x in self.tk.split(
self.tk.call(_flatten((self._w, cmd)))):
cnf[x[0][1:]] = (x[0][1:],) + x[1:]
return cnf
if type(cnf) is StringType:
--- 1122,1134 ----
cnf = _cnfmerge(cnf)
if cnf is None:
cnf = {}
! for x in self.tk.splitlist(
self.tk.call(_flatten((self._w, cmd)))):
+ if type(x) is StringType:
+ if x.startswith('-text '):
+ x = self.tk.splitlist(x)
+ else:
+ x = self.tk.split(x)
cnf[x[0][1:]] = (x[0][1:],) + x[1:]
return cnf
if type(cnf) is StringType:
Maybe better/faster way is to provide Canvas method, that
return a 'text' property for text items:
---
def get_text(self, text_id):
try:
r = self.tk.call(self._w, 'itemconfigure', text_id, '-text')
return self.tk.splitlist(r)[-1]
except TclError:
return ''
---
----------------------------------------------------------------------
Comment By: Matthias Kievernagel (mkiever)
Date: 2007-01-19 18:35
Message:
Logged In: YES
user_id=1477880
Originator: NO
There is a simple workaround: use itemcget.
The error applies to other options as well:
dash, activedash, disableddash, tags, arrowshape, font
These options also may contain a space in their value.
I collected this information from 'man n Canvas' from Tk 8.4.6
I hope I didn't miss any.
BTW the itemconfigure document string is broken.
Greetings,
Matthias Kievernagel
----------------------------------------------------------------------
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