function pj = adjustGridLineStyles(state, pj) 

% This undocumented helper function is for internal use.

% if doing postscript and axes layer is 'top', and alpha is not 1 (opaque) 

% then we want to change the GridLineStyle to ':' so it looks decent in 

% output because postscript doesn't support transparency 

%   Copyright 2014 The MathWorks, Inc.

   if ~(pj.temp.isPostscript &&  pj.temp.outputUsesPainters) 

       return; % only for truly vectorized postscript formats  

   end

   if strcmp(state, 'save')

       % save state, if needed  

       gridAx = findall(pj.Handles{1}, ...

           {'Type', 'axes', '-or', 'Type','polaraxes'}, ...

           'Visible', 'on', 'Layer', 'top', ...

           'GridLineStyleMode', 'auto', '-not', 'GridAlpha', 1);

       if ~isempty(gridAx)

           pj.temp.gridData.ax = gridAx;

           pj.temp.gridData.linestyle     = get(gridAx, 'GridLineStyle');

           pj.temp.gridData.linestyleMode = get(gridAx, 'GridLineStyleMode');

           % make sure to have cell arrays to make it easier to restore later

           if ~iscell(pj.temp.gridData.linestyle)

               pj.temp.gridData.linestyle = {pj.temp.gridData.linestyle};

               pj.temp.gridData.linestyleMode = {pj.temp.gridData.linestyleMode};

           end

           set(gridAx, 'GridLineStyle', ':');

           pj.temp.test.adjustGridLineStyles = 'set';

       end

   else

       % restore previously saved values 

       if isfield(pj.temp, 'gridData') && ~isempty(pj.temp.gridData.ax)

          set(pj.temp.gridData.ax, {'GridLineStyle'}, pj.temp.gridData.linestyle);

          set(pj.temp.gridData.ax, {'GridLineStyleMode'}, pj.temp.gridData.linestyleMode);

          pj.temp.test.adjustGridLineStyles = 'restore';

       end

   end

end