Specifications

5 Application Examples
5-42
•Application M-file options selected:
Generate callback function prototypes
Application allows only one instance to run
Launching the GUI
You can call the application M-file with no arguments, in which case the GUI
uses the default address book MAT-file, or you can specify a MAT-file as an
argument. Specifying a MAT-file as an input argument requires modification
to the default GUI initialization section of the application M-file. The following
code shows these changes in bold.
function varargout = address_book(varargin)
if nargin <= 1 % LAUNCH GUI
fig = openfig(mfilename,'reuse');
set(fig,'Color',get(0,'defaultUicontrolBackgroundColor'));
handles = guihandles(fig);
guidata(fig, handles);
if nargin == 0
% Load the default address book
Check_And_Load([],handles)
elseif exist(varargin{1},'file')
Check_And_Load(varargin{1},handles)
else
% If the file does not exist, return an error dialog
% and set the text to empty strings
errordlg('File Not Found','File Load Error')
set(handles.Contact_Name,'String','')
set(handles.Contact_Phone,'String','')
end
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