function handleOut=qpsa(handleIn)
%QPSA Get handle to the current QuickPlot axis.
%   H = QPSA returns the handle to the axis currently selected in the
%   PlotManager of QuickPlot.
%
%   See also QPSF, GCF, GCA.

%----- LGPL --------------------------------------------------------------------
%                                                                               
%   Copyright (C) 2011-2019 Stichting Deltares.                                     
%                                                                               
%   This library is free software; you can redistribute it and/or                
%   modify it under the terms of the GNU Lesser General Public                   
%   License as published by the Free Software Foundation version 2.1.                         
%                                                                               
%   This library is distributed in the hope that it will be useful,              
%   but WITHOUT ANY WARRANTY; without even the implied warranty of               
%   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU            
%   Lesser General Public License for more details.                              
%                                                                               
%   You should have received a copy of the GNU Lesser General Public             
%   License along with this library; if not, see <http://www.gnu.org/licenses/>. 
%                                                                               
%   contact: delft3d.support@deltares.nl                                         
%   Stichting Deltares                                                           
%   P.O. Box 177                                                                 
%   2600 MH Delft, The Netherlands                                               
%                                                                               
%   All indications and logos of, and references to, "Delft3D" and "Deltares"    
%   are registered trademarks of Stichting Deltares, and remain the property of  
%   Stichting Deltares. All rights reserved.                                     
%                                                                               
%-------------------------------------------------------------------------------
%   http://www.deltaressystems.com
%   $HeadURL$
%   $Id$

if nargin>0
    % if this is an axes handle, automatically switch to the right figure.
    % Otherwise, assume it concerns the selection of an axes in the
    % current figure.
    if ~ischar(handleIn)
        d3d_qp('selectfigure',handleIn);
    end
    d3d_qp('selectaxes',handleIn);
end
if nargout>0
    handleOut = d3d_qp('selectedaxes');
end
