# CREATE MODEL FILE FRAME
my $model_info_frame = $mw->Frame->pack( -side => "top", -fill => 'x' );

# Label
$model_info_frame->Label( -text => "Model File : " )->pack( -side => "left" );

# Input field
$model_info_frame->Entry(
    -width        => 60,
    -textvariable => \$filename
)->pack( -side => "left" );

# Browse files button
$model_info_frame->Button(
    -text    => "...",
    -command => sub {
        $filename = $mw->getOpenFile( -title => 'File Browser' );
    }
)->pack( -side => "left" );

# CREATE RANGE FILE FRAME
my $range_info_frame = $mw->Frame->pack( -side => "top", -fill => 'x' );

# Label
$range_info_frame->Label( -text => "Range File : " )->pack( -side => "left" );

# Input field
$range_info_frame->Entry(
    -width        => 60,
    -textvariable => \$filename
)->pack( -side => "left" );

# Browse files button
$range_info_frame->Button(
    -text    => "...",
    -command => sub {
        $filename = $mw->getOpenFile( -title => 'File Browser' );
    }
)->pack( -side => "left" );