function [data,check] = loop_through_structure(data)
% Input
% data - Structure that contains the data
%
% Output
% data - The data that the variable contains
% check - 1 if the dialog is excited normally, 0 if closed
%
% Author(s): Jonathan Moeyersons (Jonathan.Moeyersons@esat.kuleuven.be)
% Sabine Van Huffel (Sabine.Vanhuffel@esat.kuleuven.be)
% Carolina Varon (Carolina.Varon@esat.kuleuven.be)
%
% Version History:
% - 06/05/2019 JM Initial version
%
% Copyright (c) 2019, Jonathan Moeyersons, KULeuven-ESAT-STADIUS
%
% This software is made available for non commercial research purposes only
% under the GNU General Public License. However, notwithstanding any
% provision of the GNU General Public License, this software may not be
% used for commercial purposes without explicit written permission after
% contacting jonathan.moeyersons@esat.kuleuven.be
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program 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 General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <https://www.gnu.org/licenses/>.
% Disable the back button
enableback = 'off';
% Pre-allocate depth in structure
depth = 1;
% Get the fieldnames
vars{depth} = fieldnames(data);
% Define the temporary data
temp_data = data;
% Loop until there is no more structure
while isa(temp_data,'struct')
% Show data structure
[temp_selection,check] = listdlg_JM('PromptString','Select the ECG file:',...
'SelectionMode','single',...
'ListString',vars{depth},...
'EnableBack',enableback);
if check == 1 % OK button is pressed
% Adjust selection
selection(depth) = temp_selection; %#ok
% Change the data variable
temp_data = temp_data.(vars{depth}{selection(depth)});
% Change depth
depth = depth+1;
% Enable the back button
enableback = 'on';
% Get the fieldnames, if this is not possible, we have reached the
% end
try
vars{depth} = fieldnames(temp_data);
catch
break
end
elseif check == 2 % Back button is pressed
% Change depth
depth = depth-1;
% Change the data variable
if depth == 1 % Back to the start
temp_data = data;
% Disable the back button
enableback = 'off';
else % One step back
temp_data = data;
for ii = 1:length(depth-1)
temp_data = temp_data.(vars{ii}{selection(ii)});
end
end
else
break
end
end
if check == 1
% Change the original data variable
data = temp_data;
end