See Tk::Panedwindow/http://www.tcl.tk/man/tcl8.5/TkCmd/panedwindow.htm#M17

In sub create_fields add 

{
    my($x,$y) = $paned_win->sash( coord  => 0) ;
    $paned_win->sash( place => 0, $x + 400, $y );
}

[download]

That will grow the left pane ; adjust this code as you require.

In reply to Re: Perl Tk Panedwindow Pane Width Sash Position by Anonymous Monk
in thread Perl Tk Scrolled Width Question by buzzthebuzzsaw

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