[vtkusers] Question about tcl/tk-VTK application,..

[CLEMENTS, ROBERT]

i assume its because $a is not a global variable and any access to it outside of your procedure is invalid (ie. with your command).   You need to create a global variable i think for each $a
________________________________________
From: vtkusers-bounces at vtk.org [vtkusers-bounces at vtk.org] On Behalf Of Miguel Ángel Rodríguez Florido [marf at itccanarias.org]
Sent: Friday, September 11, 2009 1:01 PM
To: vtkusers at vtk.org
Subject: [vtkusers] Question about tcl/tk-VTK application,..

        Hi all,

        Sorry, because this question is more related to tcl/tk, but I know that
many people that works under VTK uses Tcl/Tk..so sorry again for people
that not.

        My question is very simple, but I haven't found how to do that.

        I have a Tcl/Tk procedure like:

        proc myproc {vars} {

        code

          foreach a $list {
                button .blabla.$a -text $a -command {puts $a}
          }

        }


However the foreach variable $a doesn't exist in the -command option. I
mean, I got an error when it runs this puts: puts $a.
        If I do global this variable: global a, I only got the last value of $a.

        So I understand that the foreach command is running first, and when it
finishs, the tcl run the -command option of the tk button.

        How can I access to the variable "a" in the -command button option??. I
mean, how can I get the value of "a" at foreach step in the -command option?

        Thank you very much.
        Best regards.

--
Miguel Ángel Rodríguez Florido
Departamento de Ingeniería Software
División de Investigación y Desarrollo Tecnológico
INSTITUTO TECNOLOGICO DE CANARIAS, S.A. - GOBIERNO DE CANARIAS
URL: www.itccanarias.org t: +34 928 727548/457462, f: +34 928 727517

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