Re: Snow Leopard Cursor Keys broken.

[Thomas Dickey]

On Thu, 8 Apr 2010, Nicholas Cole wrote:

> On Thu, Apr 8, 2010 at 6:28 PM, Nicholas Cole <address@hidden> wrote:
> > Dear List,
> >
> > I'm having a strange curses problem on Mac OS 10.6.3.  If I use the
> > system provided python, curses applications do not correctly interpret
> > arrow keys (I've tried both with xterm and with Terminal.app, so I
> > don't think it is a terminal problem).  If I use the version of python
> > I've installed from fink, everything works as expected.
> >
> > This is definitely a 10.6.3 problem.  When I found the problem on my
> > Desktop machine, I tested 10.6.2 on my laptop and it worked fine.
> > Upgrading to 10.6.3 broke the cursor keys in exactly the same way.
> >
> > I've attached code that demonstrates the problem.  On 10.6.2 the left
> > arrow key produces "KEY_LEFT".  On 10.6.3 it produces "D"

What I'm seeing, with current code of course (I'm not sure what's in OSX 
10.6.3 - given a patchdate for ncurses, I could make a better guess):

KEY_UP, ^C,  259
259
KEY_RIGHT, ^E,  261
261
KEY_DOWN, ^B,  258
258
KEY_LEFT, ^D,  260
260

The script you've sent uses keyname for the first part, which is the only
one that _could_ produce "KEY_LEFT".

The string from unctrl is explained by noting that the values are modulo 
256.

> While I was filling out a bug report to Apple, I realised I had sent
> the wrong test code to this list.  My apologies.  Here is something
> that will illustrate it without requiring non-standard libraries!
>
> #!/usr/bin/python
> import curses
> import curses.ascii
>
> def mainloop(scr):
>    while 1:
>        scr.keypad(1)
>        curses.halfdelay(100)
>        ch = scr.getch()
>        if ch == "-1": scr.addstr(2, 0, '-1')
>        try:
>            scr.erase()
>            scr.addstr(0,0, "%s, %s,  %s" %
>            (curses.keyname(ch), curses.ascii.unctrl(ch), ch))
>            scr.addstr(1,0, str(ch))
>        except:
>            pass
>        scr.refresh()
>
> if __name__ == "__main__":
> #   locale.setlocale(locale.LC_ALL, '')
>    print curses.wrapper(mainloop)
>
>
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--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net