Idle, some Linuxes, cannot position Cursor by mouseclick

[Sunny0815]

BPO	2995
Nosy	@kbkaiser

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/kbkaiser'
closed_at = <Date 2009-04-22.20:05:36.421>
created_at = <Date 2008-05-28.17:19:39.331>
labels = ['expert-IDLE', 'type-bug']
title = 'Idle, some Linuxes, cannot position Cursor by mouseclick'
updated_at = <Date 2009-04-22.20:05:36.420>
user = 'https://bugs.python.org/Sunny0815'

bugs.python.org fields:

activity = <Date 2009-04-22.20:05:36.420>
actor = 'gpolo'
assignee = 'kbk'
closed = True
closed_date = <Date 2009-04-22.20:05:36.421>
closer = 'gpolo'
components = ['IDLE']
creation = <Date 2008-05-28.17:19:39.331>
creator = 'Sunny0815'
dependencies = []
files = []
hgrepos = []
issue_num = 2995
keywords = []
message_count = 10.0
messages = ['67460', '78639', '78694', '80325', '80718', '84320', '84357', '84400', '84418', '86325']
nosy_count = 5.0
nosy_names = ['kbk', 'gpolo', 'Sunny0815', 'michiel.overtoom', 'dbarabash']
pr_nums = []
priority = 'normal'
resolution = 'wont fix'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue2995'
versions = ['Python 3.1', 'Python 2.7']

[Sunny0815]

I'm used to be able to position the cursor by clicking on the desired
position. When running Idle (1.2.2 with Python 2.5.2) under Mandriva
Linux 2008 (or under Arch Linux 64 or i686 as well as FaunOS a Arch
based live distro) this does not work.

Running under windows it works, running under Xandros linux on my eee pc
it works too, so it's not linux specific.

I already asked on the german python ng. There have been reports that it
works too on Suse and Ubuntu. But as of yet no hint where to look to
make it working under Arch oder Mandriva.

Strange enough, i can position the Cursor by Ctrl-clicking.

I tried with a tiny Tk program with a single text field - there the
positioning does work too.

So it seems to be a bug in the distro(s) and regarding only Idle not
Tkinter in total.

[gpolo]

Can you retry making some small example that demonstrates the problem ?

[Sunny0815]

Retry is a bit difficult now, sinc I reverted back to Windows after
getting quite some answers in some places, but none of them really
helpful.

It happend under Madriva Linux (and some other tested Linuxes). Now I'm
using Gentoo (this is, IF I'm using Linux). And there it works all fine.

The problem was: Usually one can set the cursorposition in any given
(gui) text editor by mouse click in the text. Using Madriva, I can
click, but the cursor is not affected.

[michielovertoom]

I experience the same, on FreeBSD 7.0-REL, with tkinter compiled to use
Tk8.5 instead of Tk8.4. Tkinter compiled for Tk8.4 doesn't have the
problem.

Moving the mouse over the text widget changes the cursor to the I-beam
as expected, but click on text doesn't position the beam at the mouse
position. It is also impossible to select text with the mouse.
Selecting text with shift-arrow keys works, however.

The same bug has been reported on the OLPC wiki:

http://dev.laptop.org/ticket/7661
http://wiki.laptop.org/go/User:Rmyers/IDLE_on_the_XO

[dbarabash]

I'm using Mandriva 2009.0 and can confirm this problem. RMeyers
suggested testing further by loading and running idlelibs/IOBinding.py.

On my Linux system I find that the mouse clicks and selection works fine
when running IOBinding.py. Being that this module appears to be built
upon Tkinter, it would seem that the bug is at a higher level?

[gpolo]

I'm downloading Mandriva 2009.0 to hopefully reproduce the problem, but
I'm afraid it won't happen. Apparently people that have this issue also
reproduce it in different platforms, someone said on
http://dev.laptop.org/ticket/7661 that this occurs both on a olpc as
well on his mac.

[gpolo]

Whoa, it went better than I expected. It failed on Mandriva just like it
was mentioned, but I still haven't verified what is causing this problem.

And while running IOBinding.py doesn't demonstrate the problem, running
EditorWindow.py does.

[gpolo]

Uhm, I have compiled python-trunk in this Mandriva 2009 now and it
works! I didn't change tcl/tk version, just installed the dev packages
in order to compile _tkinter.

I still don't know how what kind of changes were done by Mandriva in
order to achieve this problem, but I believe this is an issue that will
not be solved here.

Given this bug is not so old, I expect some of the initial posters to
still be around. Any chance you can ask someone at Sugar to try
compiling python from source and test if the bug persists ?

[Sunny0815]

Guilherme Polo wrote:

I am the originator of this issue, and I'm back here. So I can add some text.

I remember having read comments on this issue striking on other linuxes
too. But I do not remember anymore what distibutions this were.

I switched my Python development to windows (or to be true, I did not
switch from windows to linux as intended at the office).

At home I switched the Distribution first to Gentoo and lately to
Ubuntu. These both work fine.
So I am out here in fact.

Regards
Matthias Sommer

[gpolo]

Closing as won't fix since there is nothing to fix on Python side, not
from what I have noticed at least.

Mandriva 2009 and Sugar (and other places with this problem) should
check how they got IDLE to act like that, and could try compiling python
from source like I did to verify if the problem goes away.