MATLAB Creating Graphical User Interfaces

8 Programming a GUIDE UI

• Gets the numeric index of the selected item and stores it in the variable,
  index_selected.


• Gets the string value of the selected item and stores it in the variable,
  item_selected.


• Displays the selected item in the MATLAB Command Window.

The example, “Interactive List Box in a GUIDE UI” on page 9-46 shows how to

populate a list box with directory names.

Pop-Up Menu

Populate Items in the Pop-Up Menu

If you are developing a UI using GUIDE, use the pop-up menu CreateFcn callback to

add items to the pop-up menu.

This code is an example of a pop-up menu CreateFcn callback that populates the menu

with the items, Red, Green, and Blue.

function popupmenu1_CreateFcn(hObject, eventdata, handles)

% hObject handle to popupmenu1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns

% Hint: popupmenu controls usually have a white background on Windows.

if ispc && isequal(get(hObject,'BackgroundColor'),...

get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

set(hObject,'String',{'Red';'Green';'Blue'});

The last line, set(hObject,'String',{'Red';'Green';'Blue'}), populates the

contents of the pop-up menu.

If you are developing a UI programmatically (without GUIDE), then populate the pop-up

menu when you create it. For example:

function myui()

figure

uicontrol('Style','popupmenu',...

'String',{'Red';'Green';'Blue'},...

'Position',[40 70 80 20]);

end