Re: [R-gui] tk2mclistbox problem

[Philippe Grosjean]

Many thanks! Added to tcltk2 1.1-1 (in a slightly different form). It 
should shortly appear on CRAN.
Best,

PhG


Christiane Raemsch wrote:
Philippe Grosjean schrieb:
Mark Heckmann wrote:
Hey Philippe,

I have a question concerning an tk2mclistbox problem.
I have the same problem as in this post you commented.

https://stat.ethz.ch/pipermail/r-sig-gui/2009-February/000911.html

It was dated Feb.09. The sample code still throws an error.
Are there any advances? Right now it seems the tk2mclistbox cannot 
be  used?!

I tried to fix the problem, but it appears to be a bug in a Tk widget 
that is not maintained any more (mclistbox). At the time I integrated 
it in tcltk2, it was fully functional. At this point, there are three 
possibilities:

1) To use a Tktable widget instead (also supported by tcltk2),

2) To use the newer tablelist Tk widget, but that requires some work 
to incorporate it in tcltk2 (http://wiki.tcl.tk/5527; the best choice 
I think),

3) To fix the old mclistbox widget (we need a good Tcl programmer here).

If someone wants to submit a patch for #3, or work on a solution for 
#2, I will gladly include it in tcltk2.
Best,

Philippe Grosjean

Am I wrong? What can I do?

Thanks in advance!!

Mark

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I also had this problem.
I found out that the error occurs in the tcl procedure 
'::tk::ListboxBeginSelect', so i rewrite it (removing the part where the 
error occurs, which was only an additional condition here *).

Run the following in R before creating the listbox:

string = 'proc ::tk::ListboxBeginSelect {w el {focus 1}} {
                                   variable ::tk::Priv
                                   if {[$w cget -selectmode] eq 
"multiple"} {
                                   if {[$w selection includes $el]} {
                                       $w selection clear $el
                                   } else {
                                       $w selection set $el
                                   }
                                   } else {
                                   $w selection clear 0 end
                                   $w selection set $el
                                   $w selection anchor $el
                                   set Priv(listboxSelection) {}
                                   set Priv(listboxPrev) $el
                                   }
                                   event generate $w <<ListboxSelect>>
                                   if {$focus && [winfo exists $w] *} 
{                                                        focus $w
                                   }
                               }'
                              .Tcl(string)

I am not a skilled tcl programmer,  it was only an experiment and for me 
it worked good.
Maybe it also helps you.

Best Regards,
C.Rämsch

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