GUIDE callback question
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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.
4 个评论
Leor Greenberger
2011-9-28
Leor Greenberger
2011-9-28
Daniel Shub
2011-9-28
Is the manageButtons function a standard MATLAB function?
Leor Greenberger
2011-9-28
采纳的回答
Fangjun Jiang
2011-9-28
0 个投票
The code is correct. The problem seems to be caused by operator error when modifying the GUI elements. Root cause is unknown. See comments.
8 个评论
Leor Greenberger
2011-9-28
Fangjun Jiang
2011-9-28
Okay, I am still used to the old fashion of GUIDE programming. I think you should use switch eventdata.NewValue
Leor Greenberger
2011-9-28
Fangjun Jiang
2011-9-28
Okay, you forced me. All I can say is that I made a quick example in my new version of MATLAB. Use the same name DBI_ButtonGroup for button group, use the name radio_DBI, no_ADC too. Copy your code in the DBI_ButtonGroup_SelectionChangeFcn() and it worked. Type "dbstop if error" in Command Window and then run your GUI to see which line caused the problem. Also, you can put break point in the .m file and run the code line by line to check the value of any variables at any time.
Leor Greenberger
2011-9-28
Fangjun Jiang
2011-9-28
This is a function provided within the GUIDE package. I suspect something was screwed up when the GUI was created. Since this is just your attempt on GUIDE, why don't you re-start. Create a new blank GUIDE GUI, take a minute or two to create these two elements and try the code again. I didn't all these in less than five minutes and I found your code worked perfectly.
Leor Greenberger
2011-9-28
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.
更多回答（1 个）
Alberto
2016-10-26
0 个投票
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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