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# tessellation_handler

## (Toolbox/tessellation_handler.m in BrainStorm 2.0 (Alpha))

### Function Synopsis

    varargout = tessellation_handler(varargin)

### Help Text

    TESSELLATION_HANDLER - : Basic Viewing of tessellation objects in BrainStorm format; GUI Manager
     function varargout = tessellation_handler(varargin)
        FIG = TESSELLATION_HANDLER launch tessellation_handler GUI.
        TESSELLATION_HANDLER('callback_name', ...) invoke the named callback.

### Cross-Reference Information

This function calls

    bst_color_scheme                   C:\BrainStorm_2001\Toolbox\bst_color_scheme.m
    bst_layout                         C:\BrainStorm_2001\Toolbox\bst_layout.m
    find_brainstorm_files              C:\BrainStorm_2001\Toolbox\find_brainstorm_files.m
    get_user_directory                 C:\BrainStorm_2001\Toolbox\get_user_directory.m

This function is called by

    set_sourceviewing_parameters       C:\BrainStorm_2001\Toolbox\set_sourceviewing_parameters.m

### Listing of function C:\BrainStorm_2001\Toolbox\tessellation_handler.m

    function varargout = tessellation_handler(varargin)
    %TESSELLATION_HANDLER - : Basic Viewing of tessellation objects in BrainStorm format; GUI Manager
    % function varargout = tessellation_handler(varargin)
    %    FIG = TESSELLATION_HANDLER launch tessellation_handler GUI.
    %    TESSELLATION_HANDLER('callback_name', ...) invoke the named callback.

    %<autobegin> ---------------------- 26-May-2004 11:34:36 -----------------------
    % --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
    %
    % CATEGORY: Visualization
    %
    % Alphabetical list of external functions (non-Matlab):
    %   toolbox\bst_color_scheme.m
    %   toolbox\bst_layout.m
    %   toolbox\find_brainstorm_files.m
    %   toolbox\get_user_directory.m
    %   toolbox\tessellation_handler.m  NOTE: Routine calls itself explicitly
    %
    % Subfunctions in this file, in order of occurrence in file:
    %   varargout = TessellationFilesList_Callback(h, eventdata, handles, varargin)
    %   varargout = EnvelopeList_Callback(h, eventdata, handles, varargin)
    %   varargout = ImportFiles_Callback(h, eventdata, handles, varargin)
    %   varargout = RenameEnvelope_Callback(h, eventdata, handles, varargin)
    %   varargout = CurrentEnvelope_Callback(h, eventdata, handles, varargin)
    %   varargout = DeleteEnvelope_Callback(h, eventdata, handles, varargin)
    %   varargout = DownsizeEnvelope_Callback(h, eventdata, handles, varargin)
    %   varargout = ConcatenateEnvelopes_Callback(h, eventdata, handles, varargin)
    %   varargout = ViewEnvelope_Callback(h, eventdata, handles, varargin)
    %   varargout = SwapFaces_Callback(h, eventdata, handles, varargin)
    %   varargout = Save_Callback(h, eventdata, handles, varargin)
    %   varargout = SaveAs_Callback(h, eventdata, handles, varargin)
    %   varargout = HDone_Callback(h, eventdata, handles, varargin)
    %
    % Application data and their calls in this file:
    %   'Comment'
    %   'TessellationFiles'
    %   'TileType'
    %   'nFaces'
    %   'nVertices'
    %
    %   setappdata(fig,'TessellationFiles',TessFiles);
    %   setappdata(fig,'TileType','T');
    %   setappdata(handles.figure1,'Comment',Comment)
    %   setappdata(handles.figure1,'nFaces',nFaces)
    %   setappdata(handles.figure1,'nVertices',nVertices)
    %
    %   TessFiles = getappdata(handles.figure1,'TessellationFiles');
    %   nFaces = getappdata(handles.figure1,'nFaces');
    %   nVertices = getappdata(handles.figure1,'nVertices');
    %
    % Figure Files opened by this function:
    %   mfilename
    %
    %   Format of strings below: Type:Style:Tag, "String", CallBack Type and Call
    %   <automatic> callback is <Tag>_Callback by Matlab default
    %
    % Callbacks by figure tessellation_handler.fig
    %   uicontrol:frame:frame1 "" uses Callback for <automatic>
    %   uicontrol:frame:frame4 "" uses Callback for <automatic>
    %   uicontrol:listbox:EnvelopeList "" uses Callback for <automatic>
    %   uicontrol:popupmenu:TessellationFilesList "N/A" uses Callback for <automatic>
    %   uicontrol:pushbutton:ConcatenateEnvelopes "Concatenate" uses Callback for <automatic>
    %   uicontrol:pushbutton:DeleteEnvelope "Delete" uses Callback for <automatic>
    %   uicontrol:pushbutton:DownsizeEnvelope "Downsize" uses Callback for <automatic>
    %   uicontrol:pushbutton:HDone "Done" uses Callback for <automatic>
    %   uicontrol:pushbutton:ImportFiles "Import" uses Callback for <automatic>
    %   uicontrol:pushbutton:pushbutton16 "Cancel" uses Callback for <automatic>
    %   uicontrol:pushbutton:RenameEnvelope "Rename" uses Callback for <automatic>
    %   uicontrol:pushbutton:Save "Save" uses Callback for <automatic>
    %   uicontrol:pushbutton:SaveAs "Save as" uses Callback for <automatic>
    %   uicontrol:pushbutton:SwapFaces "Swap faces" uses Callback for <automatic>
    %   uicontrol:pushbutton:ViewEnvelope "View" uses Callback for <automatic>
    %   uicontrol:text:FacesVertices "n/a Faces - n/a Vertices" uses Callback for ''
    %   uicontrol:text:HowManyEnvelopes "Envelope(s)" uses Callback for
    %     tessellation_handler('text2_Callback',gcbo,[],guidata(gcbo))
    %   uicontrol:text:HowManyFiles "Tessellation File(s)" uses Callback for
    %     tessellation_handler('text1_Callback',gcbo,[],guidata(gcbo))
    %
    % At Check-in: $Author: Mosher $  $Revision: 7 $  $Date: 5/26/04 10:02a $
    %
    % This software is part of BrainStorm Toolbox Version 2.0 (Alpha) 24-May-2004
    %
    % Principal Investigators and Developers:
    % ** Richard M. Leahy, PhD, Signal & Image Processing Institute,
    %    University of Southern California, Los Angeles, CA
    % ** John C. Mosher, PhD, Biophysics Group,
    %    Los Alamos National Laboratory, Los Alamos, NM
    % ** Sylvain Baillet, PhD, Cognitive Neuroscience & Brain Imaging Laboratory,
    %    CNRS, Hopital de la Salpetriere, Paris, France
    %
    % See BrainStorm website at http://neuroimage.usc.edu for further information.
    %
    % Copyright (c) 2004 BrainStorm by the University of Southern California
    % This software distributed  under the terms of the GNU General Public License
    % as published by the Free Software Foundation. Further details on the GPL
    % license can be found at http://www.gnu.org/copyleft/gpl.html .
    %
    % FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
    % UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
    % WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
    % MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
    % LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
    %<autoend> ------------------------ 26-May-2004 11:34:36 -----------------------

    % Last Modified by GUIDE v2.0 11-Nov-2003 09:12:32

    if nargin == 0  % LAUNCH GUI

        % Open and make the GUI look good
        fig = openfig(mfilename,'reuse');
        setappdata(fig,'TileType','T');
        bst_color_scheme(fig);
        bst_layout('align',fig,2,2,4);
        set(fig,'visible','on')

        % Generate a structure of handles to pass to callbacks, and store it.
        handles = guihandles(fig);
        guidata(fig, handles);

        % Look for tessellation files in current subject folder
        Users = get_user_directory;
        SubjectPath = fileparts(fullfile(Users.SUBJECTS,Users.CurrentData.SubjectFile));
        TessFiles = find_brainstorm_files('tess',SubjectPath);
        if isempty(TessFiles)
            TessFiles = {'N/A'};
            set(handles.TessellationFilesList,'Enable','off')
            nEnvelopes = 0;
        else
            set(handles.TessellationFilesList,'Enable','on')
            nEnvelopes = length(TessFiles);
        end
        set(handles.TessellationFilesList,'String',TessFiles,'Value',1,'Max',nEnvelopes)
        set(handles.HowManyFiles,'String',sprintf('%d Tessellation file(s)',nEnvelopes))

        % Store tessellation files
        setappdata(fig,'TessellationFiles',TessFiles);

        % Display info about first tessellation in list
        TessellationFilesList_Callback(fig,[],handles)

        if nargout > 0
            varargout{1} = fig;
        end

    elseif ischar(varargin{1}) % INVOKE NAMED SUBFUNCTION OR CALLBACK

        try
            if (nargout)
                [varargout{1:nargout}] = feval(varargin{:}); % FEVAL switchyard
            else
                feval(varargin{:}); % FEVAL switchyard
            end
        catch
            disp(lasterr);
        end

    end

    %| ABOUT CALLBACKS:
    %| GUIDE automatically appends subfunction prototypes to this file, and
    %| sets objects' callback properties to call them through the FEVAL
    %| switchyard above. This comment describes that mechanism.
    %|
    %| Each callback subfunction declaration has the following form:
    %| <SUBFUNCTION_NAME>(H, EVENTDATA, HANDLES, VARARGIN)
    %|
    %| The subfunction name is composed using the object's Tag and the
    %| callback type separated by '_', e.g. 'slider2_Callback',
    %| 'figure1_CloseRequestFcn', 'axis1_ButtondownFcn'.
    %|
    %| H is the callback object's handle (obtained using GCBO).
    %|
    %| EVENTDATA is empty, but reserved for future use.
    %|
    %| HANDLES is a structure containing handles of components in GUI using
    %| tags as fieldnames, e.g. handles.figure1, handles.slider2. This
    %| structure is created at GUI startup using GUIHANDLES and stored in
    %| the figure's application data using GUIDATA. A copy of the structure
    %| is passed to each callback.  You can store additional information in
    %| this structure at GUI startup, and you can change the structure
    %| during callbacks.  Call guidata(h, handles) after changing your
    %| copy to replace the stored original so that subsequent callbacks see
    %| the updates. Type "help guihandles" and "help guidata" for more
    %| information.
    %|
    %| VARARGIN contains any extra arguments you have passed to the
    %| callback. Specify the extra arguments by editing the callback
    %| property in the inspector. By default, GUIDE sets the property to:
    %| <MFILENAME>('<SUBFUNCTION_NAME>', gcbo, [], guidata(gcbo))
    %| Add any extra arguments after the last argument, before the final
    %| closing parenthesis.

    % --------------------------------------------------------------------
    function varargout = TessellationFilesList_Callback(h, eventdata, handles, varargin)

    % Display information about selected tessellation file

    set(handles.figure1,'pointer','watch')
    drawnow

    set(handles.EnvelopeList,'Value',1)

    TessFiles = getappdata(handles.figure1,'TessellationFiles');
    iFile = get(handles.TessellationFilesList,'Value'); % Which file is selected ?
    if strcmpi(TessFiles{iFile},'N/A') % No file available, return
        set(fig,'pointer','arrow')
        return
    end

    Users = get_user_directory;
    SubjectPath = fileparts(fullfile(Users.SUBJECTS,Users.CurrentData.SubjectFile));
    cd(SubjectPath)
    load(TessFiles{iFile},'Comment','Faces','Vertices')

    if isempty(Comment)
        % empty tessellation file - delete
        ButtonName=questdlg('This file is apparently empty - would you like to remove it from disk?', ...
            'DataBase Cleaning', ...
            'Yes','No','No');
        switch(ButtonName)
        case 'No'
            set(fig,'pointer','arrow')
            return
        case 'Yes'
            switch(upper(computer))
            case('PCWIN')
                dos(sprintf('del %s', TessFiles{iFile}));
            case ('UNIX')
                unix(sprintf('rm %s %s', TessFiles{iFile}));
            end
            tessellation_handler
        end
    else
        set(handles.EnvelopeList,'string',Comment)

        for k = 1:length(Faces);
            nFaces(k) = size(Faces{k},1);
        end
        clear Faces
        for k = 1:length(Vertices);
            nVertices(k) = size(Vertices{k},2);
        end
        clear Vertices

        setappdata(handles.figure1,'Comment',Comment)
        setappdata(handles.figure1,'nFaces',nFaces)
        setappdata(handles.figure1,'nVertices',nVertices)

        set(handles.HowManyEnvelopes,'String',sprintf('%d Envelope(s)',length(Comment)));
        set(handles.EnvelopeList,'Max',length(Comment),'Value',1)

        EnvelopeList_Callback(h,[],handles); % Get info from first envelope in list

    end

    set(handles.figure1,'pointer','arrow')

    % --------------------------------------------------------------------
    function varargout = EnvelopeList_Callback(h, eventdata, handles, varargin)

    % Display info related to selected envelope in tessellation file

    iCurrent = get(handles.EnvelopeList,'Value'); % what's the current envelope ?

    nFaces = getappdata(handles.figure1,'nFaces');
    nVertices = getappdata(handles.figure1,'nVertices');

    try
        if length(nFaces) == length(nVertices) % several envelopes of different tissues are stored (pre-MMII convention)
            set(handles.FacesVertices,'String',sprintf('%d Faces - %d Vertices',nFaces(iCurrent),nVertices(iCurrent)))
        else % Variations of the same envelope: number of faces and vertices is the same for all variations
            set(handles.FacesVertices,'String',sprintf('%d Faces - %d Vertices',nFaces(1),nVertices(1)))
        end
    catch
        set(handles.EnvelopeList,'Value', min(iCurrent));
        EnvelopeList_Callback(h, eventdata, handles)
        return
    end

    % --------------------------------------------------------------------
    function varargout = ImportFiles_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = RenameEnvelope_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = CurrentEnvelope_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = DeleteEnvelope_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = DownsizeEnvelope_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = ConcatenateEnvelopes_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = ViewEnvelope_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = SwapFaces_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = Save_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = SaveAs_Callback(h, eventdata, handles, varargin)

    % --------------------------------------------------------------------
    function varargout = HDone_Callback(h, eventdata, handles, varargin)

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