MATLAB: Can’t I change the foreground color for a radiobutton, checkbox, or popupmenu in GUIDE for MATLAB 6.x (R12.x)

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Why can't I change the foreground color for a radiobutton, checkbox, or popupmenu in GUIDE for MATLAB 6.0 and 6.1 (R12 and R12.1)?

I can double click on a UICONTROL object and change its foreground color from the Property Inspector for any UI object in GUIDE. However, I cannot see the actual color changes in GUIDE for radiobuttons, checkboxes, and popupmenus. Fortunately, my GUI application does show the changes.

Best Answer

This is a bug in the way GUIDE displays the objects in MATLAB 6.0 and 6.1 (R12 and R12.1). Our development staff has been notified and is currently looking into addressing this problem for a future release of MATLAB. Please note that the changes are indeed visible in the GUI when it is executed.

There are no known workarounds available at this time.

Related Solutions

MATLAB: Do callback properties disappear from the Property Inspector when I open a GUI created in GUIDE in MATLAB 7.6 (R2008a) in MATLAB 7.4 (R2007a)

Due to the backwards compatibility issues between MATLAB 7.6 (R2008a) and MATLAB 7.4 (R2007a), it is not possible to see the callbacks in the Property Inspector for the GUI created in MATLAB 7.6 (R2008a) and then viewed in MATLAB 7.4 (R2007a). You can, however, access the Callbacks for your uicontrols in MATLAB7.4 (R2007a) if you right-click on a UICONTROL in GUIDE and select View Callbacks->Callback.

MATLAB: Uicontrol used to create a checkbox, how to program this checkbox via Guide…. the Callback for checkbox is not in the M file

Gary - rather than creating 40 callbacks, you could just use the same one for each of the 40 checkboxes. Try the following

 for k=1:40; 
    cbh(k) = uicontrol('Style','checkbox','String',handles.label(k), ...
                       'Value',0,'Position',[30 20*k 130 20],        ...
                        'Callback',{@checkBoxCallback,k});
 end

For each checkbox, we assign the callback @checkBoxCallback. We wrap it in braces so that we can include additional input parameters to the function. In this case, k, the id of the checkbox. We can now define the callback as

 function checkBoxCallback(hObject,eventData,checkBoxId)
    value = get(hObject,'Value');
    if value
        switch checkBoxId
            case 1
                fprintf('handle cb 1\n');
            case 2
                fprintf('handle cb 2\n');
            otherwise
                fprintf('do nothing\n');
        end
    end

The function signature is

 function checkBoxCallback(hObject,eventData,checkBoxId)

with the expected inputs of hObject, the handle to the checkbox that has been checked or unchecked; eventData, an empty matrix of nothing (this is expected); and checkBoxId, which is the k from our for loop. In this example, we get the value of the checkbox (checked or not), and if it is, we evaluate some code.

Now, if you have added this code into your GUI that you have developed with GUIDE (which seems to be the case given the handles structure that you reference to get the labels from) then presumably you are running this code in the OpeningFcn of your GUI m file. If that is the case, then you may want to set the parent of the checkbox to be the figure. That way, in the callback, you can make use of guidata. As well, you may want to save your list of checkbox handles to the handles structure (just for future reference, and because all widget/control handles are saved to this structure).

 handles.cbh = zeros(40,1);
 for k=1:40; 
    handles.cbh(k) = uicontrol('Style','checkbox','String',handles.label(k), ...
                               'Value',0,'Position',[30 20*k 130 20],        ...
                               'Parent', hObject,                            ...
                               'Callback',{@checkBoxCallback,k});
 end
 guidata(hObject,handles);

Then in the callback, you can grab the handles structure to reference any other controls (axes for plotting, etc.) or user-defined data.

 function checkBoxCallback(hObject,eventData,checkBoxId)
    handles = guidata(handles);
    value = get(hObject,'Value');
    % etc.

Try the above and see what happens!

Best Answer

Related Solutions

MATLAB: Do callback properties disappear from the Property Inspector when I open a GUI created in GUIDE in MATLAB 7.6 (R2008a) in MATLAB 7.4 (R2007a)

MATLAB: Uicontrol used to create a checkbox, how to program this checkbox via Guide…. the Callback for checkbox is not in the M file

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