MATLAB Creating Graphical User Interfaces

9 Examples of GUIDE UIs

• If you create a new entry, you must save the MAT-file using the File > Save menu.

The Contact_Name_Callback callback uses the handles structure to access the

contents of the address book and to maintain an index pointer (handles.Index)

that enables the callback to determine what name is displayed before you enter

a new one. The index pointer indicates what name is currently displayed. The

Check_And_Load function adds the address book and index pointer fields when you run

the address_book function.

If you add a new entry, the callback adds the new name to the address book and updates

the index pointer to reflect the new value displayed. The updated address book and index

pointer are again saved (using guidata) in the handles structure.

Contact_Name_Callback

function Contact_Name_Callback(hObject, eventdata, handles, varargin)

% Get the strings in the Contact Name and Phone text box

Current_Name = get(handles.Contact_Name,'string');

Current_Phone = get(handles.Contact_Phone,'string');

% If empty then return

if isempty(Current_Name)

return

end

% Get the current list of addresses from the handles structure

Addresses = handles.Addresses;

% Go through the list of contacts

% Determine if the current name matches an existing name

for i = 1:length(Addresses)

if strcmp(Addresses(i).Name,Current_Name)

set(handles.Contact_Name,'string',Addresses(i).Name)

set(handles.Contact_Phone,'string',Addresses(i).Phone)

handles.Index = i;

guidata(hObject,handles)

return

end

end

% If it's a new name, ask to create a new entry

Answer=questdlg('Do you want to create a new entry?', ...

'Create New Entry', ...

'Yes','Cancel','Yes');