I have a peculiar problem using module Tkx in combination with module Storable. The purpose is to store all parameters entered by a user in a Tk interface in a file so that it can be loaded the next time when the program is started again.

I have simplified the code here, there is only one parameter $Value and a simple Tk screen with only one entry field linked to $Value. I first store and retrieve $Value and this works OK. Then I change the value with the Tk screen and then things go strange: 

my $Value = 666;
store( \$Value, 'param.ini' );
# The file viewed in Wordpad shows 'pst0    12345678  '

my $pRPar = retrieve('param.ini');
$Value = $$pRPar;
print("$Value\n"); # Prints '666'

my $MainWindow = Tkx::widget->new('.');
my $Entry = $MainWindow->new_ttk__entry(-textvariable => \$Value);
$Entry->g_grid(-row => 1, -column => 1);
Tkx::MainLoop(); # Change the value into '111' and close the window
print("$Value\n"); # Prints '111', so this is OK. But...

store( \$Value, 'param.ini' );
# The file viewed in Wordpad shows now 'pst0    12345678Tcl::
+Var   Tcl^    ::perl::SCALAR(0x3b54b38)'

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So the first time the value is stored correctly (if you use a string instead of an integer you will see the string value in the file). The second time you see strange things appear such as 'Tcl::Var' and '::perl::SCALAR(0x3b54b38)'.

Any idea what's happening here?

In reply to Strange behaviour of Tkx in combination with Storable by JanLaloux

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