GUIDE callback question

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Leor Greenberger
Leor Greenberger 2011-9-28
回答： Alberto 2016-10-26
I have a button group (tag: DBI_ButtonGroup) with two radio buttons (tag1: radio_DBI tag2: radio_non_DBI)
My selctionchangefcn callback is as follows:
% --- Executes when selected object is changed in DBI_ButtonGroup.
function DBI_ButtonGroup_SelectionChangeFcn(hObject, eventdata, handles)
% hObject handle to the selected object in DBI_ButtonGroup
% eventdata structure with the following fields (see UIBUTTONGROUP)
% EventName: string 'SelectionChanged' (read only)
% OldValue: handle of the previously selected object or empty if none was selected
% NewValue: handle of the currently selected object
% handles structure with handles and user data (see GUIDATA)
switch get(eventdata.NewValue,'Tag') % Get Tag of selected object.
case 'radio_DBI'
set(handles.no_ADC,'Enable','Off')
otherwise
set(handles.no_ADC,'Enable','On')
end
So I basically want to change the tag called no_ADC (which is an edit text control, to Enable = off or Enable = on based on the radio button selection. When I run this, however, MATLAB spits out the following error:
Error using handle.handle/get
Invalid or deleted object.
Error in uitools.uibuttongroup/childAddedCbk>manageButtons (line 59)
oldctrl = get(hgroup, 'OldSelectedObject');
Error while evaluating uicontrol Callback
I don't understand what is wrong.
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Daniel Shub
Daniel Shub 2011-9-28
Is the manageButtons function a standard MATLAB function?
Leor Greenberger
Leor Greenberger 2011-9-28
I am not sure what that function even does. First attempt at GUIDE.

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2011-9-28
The code is correct. The problem seems to be caused by operator error when modifying the GUI elements. Root cause is unknown. See comments.
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Leor Greenberger
Leor Greenberger 2011-9-28
Hi Fangjun,
This is exactly what I just did. I basically copied/pasted the objects into a new blank GUIDE GUI and it worked. I am wondering about something though. On my first attempt, I would create objects, arrange them, etc, and save the .fig every so often. I then went back and set the TAG names for each object. Could this have been the problem? I am wondering if GUIDE breaks when you do that? On my COPY/paste attempt, I set all the tag names before saving.
Fangjun Jiang
Fangjun Jiang 2011-9-28
Notice the function definition function DBI_ButtonGroup_SelectionChangeFcn(hObject, eventdata, handles)? The name is associated with the tag name of the GUI elements. If you change the tag name in GUIDE, the function name is supposed to be changed automatically. I mean "suppsed to". I had experience that for unknown reason, they were un-synchronized and I have to do a lot to recover it back. But I can't re-produce that procedure to prove that something is wrong with GUIDE. So, just be careful, save often and back up often.

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更多回答（1 个）

Alberto
Alberto 2016-10-26
I think I found the solution. Just left-click on buttongrup panel and Bring to front, also the same with all radiobuttons inside the buttongrup panel. That worked for me.

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