_gain->add (grid, wxGBPosition (r, 1));
add_label_to_grid_bag_sizer (grid, this, _("dB"), false, wxGBPosition (r, 2));
_gain_calculate_button = new wxButton (this, wxID_ANY, _("Calculate..."));
_gain->add (grid, wxGBPosition (r, 1));
add_label_to_grid_bag_sizer (grid, this, _("dB"), false, wxGBPosition (r, 2));
_gain_calculate_button = new wxButton (this, wxID_ANY, _("Calculate..."));