gistfile1.matlab

function sliceScrollFunction(handles, event_data)

% Try this for error avoidance
% pause(0.25)

% Get appdata
mainfig = getappdata(0, 'mainfig');
img_data =     getappdata(mainfig, 'cq');
currentSlice = getappdata(mainfig, 'currentSlice');
current_gca =  getappdata(mainfig, 'current_gca');

% Perform a switch on current_gca, and do the wheel scroll on the preferred
% choice and update that graph
switch current_gca
    case 'axial'
        % Case is axial, update gca with one slice in preferred direction,
        % can possibly change later to modular amount.
        
        if event_data == -1
            if currentSlice(3) <= size(img_data,3)
                currentSlice(3) = currentSlice(3) + 1;
            else
                return
            end
        elseif event_data == 1;
            if currentSlice(3) > 1
                currentSlice(3) = currentSlice(3) - 1;
            else
                return;
            end
        else
            return;
        end
        
        % REMEMBER TO UPDATE APPDATA WITH NEW CURRENTSLICE
        setappdata(mainfig, 'currentSlice', currentSlice);
        
        % Clear and update relevant gca
        displayAxial(handles); 
        
    case 'sagittal'
        % Case is sagittal, update gca with one slice in preferred direction,
        % can possibly change later to modular amount.
        
        if event_data == -1
            if currentSlice(1) <= size(img_data,1)
                currentSlice(1) = currentSlice(1) + 1;
            else
                return;
            end
        elseif event_data == 1;
            if currentSlice(1) > 1
                currentSlice(1) = currentSlice(1) - 1;
            else
                return;
            end
        else
            return;
        end
        
        % REMEMBER TO UPDATE GCF WITH NEW CURRENTSLICE
        setappdata(mainfig, 'currentSlice', currentSlice);
        
        % Clear and update relevant gca
        displaySagittal(handles); 
        
    case 'coronal'
        % Case is coronal, update gca with one slice in preferred direction,
        % can possibly change later to modular amount.
        
        if event_data == -1
            if currentSlice(2) <= size(img_data,2)
                currentSlice(2) = currentSlice(2) + 1;
            else
                return;
            end
        elseif event_data == 1;
            if currentSlice(2) <= size(img_data,2)
                currentSlice(2) = currentSlice(2) - 1;
            else
                return;
            end
        else
            return;
        end
        
        % REMEMBER TO UPDATE GCF WITH NEW CURRENTSLICE
        setappdata(mainfig, 'currentSlice', currentSlice);
        
        % Clear and update relevant gca
        displayCoronal(handles); 
        
    otherwise
        return;
end

if get(handles.inclCrosshairsChxbox, 'Value') == 1;
    drawCrosshairs(handles);
end

end