MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Podręcznik Użytkownika Pobierz pdf (Strona 461)

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An Address Book Reader (GUIDE)

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',dat a.Addresses(1).Phone)

% Set the index pointer to 1 and save handle s

handles.Index = 1;

guidata(handles.Address_Book,handles)

else

errordlg('Not a valid Address Book','Address Book Error')

end

The Open Menu Callback

The address book GUI contains a File menu that has an Open submenu for

loading address book MAT-files. When selected, Open displays a dialog box

(

uigetfile)thatenablestheusertobrowseforfiles.Thedialogboxdisplays

only MAT-file s, but users ca n c h an ge th e filte r to disp la y all files.

The dialogbox returns both the file name and the path to the file, which is

then passed to

fullfile to ensure the p ath is properly constructed for any

platform.

Check_And_Load validates and load the new address b ook.

Open_Callback Code Listing

function Open_C allb ack(hObject, eventd ata, handles)

[filename, p athn ame] = uigetfile( . ..

{'*.mat', 'All MAT-Files (*.mat)'; ...

'*.*','All Fi les (*.*)'}, ...

'Select Address Book');

% If "Cancel" is selected then return

if isequal([ file name,pathname],[0,0])

return

% Otherwise construct the fullfilename and Che ck and load

% the file

else

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