MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manual de usuario descargar pdf (Pagina 260)

10 Examples of GUIDE GUIs

10-36

Check_And_Load Code Listing

This is the Check_And_Load function.

function pass = Check_And_Load(file,handles)

% Initialize the variable "pass" to determine if this is a valid

% file.

pass = 0;

% If called without any file then set file to the default

% filename.

% Otherwise, if the file exists then load it.

if isempty(file)

file = 'addrbook.mat';

handles.LastFile = file;

guidata(handles.Address_Book,handles)

end

if exist(file) == 2

data = load(file);

end

% Validate the MAT-file

% The file is valid if the variable is called "Addresses" and

% it has fields called "Name" and "Phone"

flds = fieldnames(data);

if (length(flds) == 1) && (strcmp(flds{1},'Addresses'))

fields = fieldnames(data.Addresses);

if (length(fields) == 2) && ...

(strcmp(fields{1},'Name')) && ...

(strcmp(fields{2},'Phone'))

pass = 1;

end

% If the file is valid, display it

if pass

% Add Addresses to the handles structure

handles.Addresses = data.Addresses;

guidata(handles.Address_Book,handles)

% Display the first entry

set(handles.Contact_Name,'String',data.Addresses(1).Name)

set(handles.Contact_Phone,'String',data.Addresses(1).Phone)

% Set the index pointer to 1 and save handles

handles.Index = 1;

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manual de usuario Pagina 260