function h = specplot(f,nrows,varargin)

import com.mathworks.toolbox.timeseries.*;
import java.awt.dnd.*

% Create class instance
h = tsguis.specplot;
if nargin==0
    return
end

% Configure figure
ax = axes('Parent',double(f),'Units','Normalized','Visible','off','ButtonDownFcn',...
        {@tsWindowButtonDownFcn h});
ax_plotedit = hggetbehavior(ax,'PlotEdit');
ax_plotedit.Enable = false;

%% Set the key press callback
set(ancestor(f,'figure'),'KeyPressFcn',{@tsKeyPressFcn h})

% Generic property init
init_prop(h, ax, [nrows 1]);

% User-specified initial values (before listeners are installed...)
% Needed to set styleManager
h.set(varargin{1:end});

%% Initialize the handle graphics objects used in @specplot class.
%% Note there is no base class initialize method 
geometry = struct('HeightRatio',[],...
'HorizontalGap', 16, 'VerticalGap', 16, ...
'LeftMargin', 12, 'TopMargin', 20, 'PrintScale', 1);
h.AxesGrid = ctrluis.axesgrid([nrows 1], ax, ...
'Visible',     'off', ...
'Geometry',    geometry, ...
'LimitFcn',  {@updatelims h}, ...
'Title',    'Periodogram', ...
'XLabel',   'Freq',...
'YLabel',  '',...
'XUnit',  'Hz');
init_graphics(h)
addlisteners(h)

%% Customize behavior
h.setbehavior

%% Remove Amplitude from ylabel to improve figure packing and remove Tex
%% interpreters which distort underscore characters
h.Axesgrid.Ylabel = '';
h.Axesgrid.TitleStyle.Interpreter = 'None';
h.Axesgrid.XLabelStyle.Interpreter = 'None';
h.Axesgrid.RowLabelStyle.Interpreter = 'None';

%% Add menus
menus = h.tsplotmenu('SpecPlot');

%% Add char menus and set their tag so that findmenu can be used by the
%% char table to keep the menu checked status synched

var_menu = h.addCharMenu(menus.Characteristics, 'Variance',...
    'tsguis.tsCharVarData', 'tsguis.tsCharVarView'); 
set(var_menu,'Tag','Variance')


%% Intialize plot editor
h.PropEditor = tsguis.propeditor;
h.edit(h.PropEditor);