Creating Graphical User Interfaces

Launching the GUI

The GUI is nonblocking and nonmodal since it is designed to be displayed while you perform other MATLAB tasks.

Application Options Settings

This GUI uses the following application option settings:

• Resize behavior: User-specified
• Command-line accessibility: Off
• 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
    [varargout{1:nargout}] = feval(varargin{:}); % FEVAL switchyard
  catch
    disp(lasterr);
  end
end

An Address Book Reader

Loading an Address Book Into the Reader