TCL_SetVar
Set a tcl/tk variable value
Syntax
TCL_SetVar(varname, value [,interp])
Arguments
- varname
character string. Contains the name of the tcl/tk variable to set.
- value
may be a character string, a scalar, a real or string matrix (m x n). Contains the value to give to the tcl/tk variable.
- interp
optional character string parameter. Name of the slave tcl interpreter in which the operation has to be performed. If not provided, it defaults to the main tcl interpreter created by Scilab.
Description
This routine allows to set a variable within a tcl/tk interpreter. When
tcl/tk support is enabled in scilab, this routine can be used to set up
the value of a tcl/tk variable. This can be useful to change some value in
the tcl/tk interpreter without having to build a tcl/tk instruction (and
use TCL_EvalStr).
More information about Tcl/Tk: http://www.tcl.tk/doc/
Note: TCL variables are not saved by save function since they are not Scilab variables.
TCL_SetVar("myPi", 3.14); // Creates the myPi variable in the TCL session myPi // => error: the variable is a TCL one, not a Scilab one => It can't be saved
--> myPi
Undefined variable: myPi
Examples
TCL_EvalStr("toplevel .tst1"); // creates a toplevel TK window. TCL_EvalStr("entry .tst1.e -textvariable tvar"); // create an editable entry TCL_EvalStr("set tvar foobar"); // set the entry value TCL_EvalStr("pack .tst1.e"); // pack the entry widget. It appears on the screen. text=TCL_GetVar("tvar") // retrieve the variable value // change the entry text and repeat the last command ... //delete the toplevel TK window. TCL_EvalStr("destroy .tst1") //---------------------------------------------------- a=["A","B","C";"D","E","F"]; TCL_SetVar("A",a) AfromTCL=TCL_GetVar("A") //---------------------------------------------------- b=[6,4,1;2,3,5]; TCL_SetVar("B",b) BfromTCL=TCL_GetVar("B") //---------------------------------------------------- TCL_SetVar("StringTCL","string") StringFromTCL=TCL_GetVar("StringTCL") //---------------------------------------------------- TCL_SetVar("ScalarTCL",1.22) ScalarFromTCL=TCL_GetVar("ScalarTCL") //---------------------------------------------------- // Examples with a slave interpreter //---------------------------------------------------- TCL_CreateSlave('TCLSlave') a=['AA','BB','CC';'DD','EE','FF']; TCL_SetVar("A_slave",a,'TCLSlave') AfromTCL_slave=TCL_GetVar('A_slave','TCLSlave') TCL_DeleteInterp('TCLSlave') //---------------------------------------------------- TCL_CreateSlave('TCLSlave') b=[66,44,11;22,33,55]; TCL_SetVar("B_slave",b,'TCLSlave') BfromTCL_slave=TCL_GetVar('B_slave','TCLSlave') TCL_DeleteInterp('TCLSlave') //---------------------------------------------------- TCL_CreateSlave('TCLSlave') TCL_SetVar("StringTCL_slave","string in slave interpreter",'TCLSlave') StringFromTCL_slave=TCL_GetVar("StringTCL_slave",'TCLSlave') TCL_DeleteInterp('TCLSlave') //---------------------------------------------------- TCL_CreateSlave('TCLSlave') TCL_SetVar("ScalarTCL_slave",1.22,'TCLSlave') ScalarFromTCL_slave=TCL_GetVar("ScalarTCL_slave",'TCLSlave') TCL_DeleteInterp('TCLSlave')
See also
- ScilabEval — tcl instruction : Evaluate a string with scilab interpreter
- TCL_EvalFile — Reads and evaluate a tcl/tk file
- TCL_EvalStr — Evaluate a string within the Tcl/Tk interpreter
- TCL_GetVar — Get a tcl/tk variable value
- TCL_ExistVar — Return %T if a tcl variable exists
- TCL_UnsetVar — Remove a tcl variable
- TCL_UpVar — Make a link from a tcl source variable to a tcl destination variable
- TCL_CreateSlave — Create a TCL slave interpreter
- TCL_DeleteInterp — delete TCL interpreter
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