MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guida Utente Scaricare il pdf (Pagina 143)

100

101

Add Components to the GUI

The popup’s callback controls its behavior. GUIDE generates this much of

the callback.

function popupm enu1 _Callback(hObject, eventdata, handles)

% hObject handle to popupmenu1 (see GCBO)

% eventdata re serv ed - to be defi ned in a future ver sion of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: contents = get(hOb ject,'String') returns popupmenu1

% contents as cell array

% contents{get(hObject,'Value')} returns selected ite m

% from popupmen u1

The callbacks’s code adds these statements.

contents = get(hObject, 'Str ing');

selectedText = contents{get(h Obje ct,'Value')};

colormapStatus = [selectedText ' colormap'];

set(handles.textStatus, 'string', colormapStatus);

colormap(selectedText)

The String data is retrieved as a cell array and assigned to contents.The

Value property indexes the member of contents that the user just selected to

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