Closing gui window *.gif

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Michael Adelman
Michael Adelman 2012-7-23
I created gui that has uipanel with two radio buttons. I'm running two endless loops for each radio button that know to switch on from another smoothly. When I close gui window I get errors as follows:
??? Error using ==> guidata at 89
H must be the handle to a figure or figure descendent.
Error in ==> Demo>uipanel1_SelectionChangeFcn at 262
guidata(hObject, handles);
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> Demo at 42
gui_mainfcn(gui_State, varargin{:});
Error in ==>
@(hObject,eventdata)Demo('uipanel1_SelectionChangeFcn',get(hObject,'SelectedObject'),eventdata,guidata(get(hObject,'SelectedObject')))
Error in ==> hgfeval at 63
feval(fcn{1},varargin{:},fcn{2:end});
Error in ==> uitools.uibuttongroup.childAddedCbk>manageButtons at 80
hgfeval(cbk, source, evdata);
??? Error while evaluating uicontrol Callback
Can you suggest what is the proper way to close gui window?
Thanks,
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Michael Adelman
Michael Adelman 2012-7-24
yes.
button1 or button2 values taken from 'uibuttongroup' panel and then passed to the loops.
Jan
Jan 2012-7-25
Let me ask again: Do you assume, that the value of button1 or button2 is changed, during Matlab processes the infinite loop? Or in other words, is your function equivalent to:
if button1
while true
...
end
end

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回答（3 个）

Jan
Jan 2012-7-24
A secure solution would be:
  • Create two flags in the figure's local data:
setappdata(FigureHandle, 'LoopEntered', false);
setappdata(FigureHandle, 'StopLoop', false);
  • Enable a flag, when one of the loops is started:
setappdata(FigureHandle, 'LoopEntered', true)
  • When the endless loop is finished (at least when this is not a contradiction...), disable the flag again:
setappdata(FigureHandle, 'LoopEntered', false)
  • Inside the CloreRequestFcn and DeleteFcn (called when the figure is closed or deleted) set another flag to stop the loops:
if getappdata(FigureHandle, 'LoopEntered')
setappdata(FigureHandle, 'StopLoop');
while getappdata(FigureHandle, 'LoopEntered')
pause(0.1);
end
end
  • Inside the loops, check the stop flag:
while XYZ
if get(FigureHandle, 'StopLoop')
break;
end
...
end
setappdata(FigureHandle, 'LoopEntered', false);
Then you have two dynamic locks: The running loop locks the closing of the figure. Closing the figure blocks the execution of the loop.
  2 个评论
Michael Adelman
Michael Adelman 2012-7-24
Hello Jan,
does it matter if I use guide to create gui (for example, figure local data)?
does the code might change?
thanks,
Jan
Jan 2012-7-24
Even GUIDE figures are 100% full and complete Matlab figures. There is not even one spark of magic added by GUIDE. Therefore it does not matter, if you create the figure directly by a program, or if you let GUIDE create the program to create the figure.

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Michael Adelman
Michael Adelman 2012-7-25
Hello Jan,
I followed your suggestion with small adjustments:
1. the endless loops never stops, only switches one to other. Because of that, I left in the CloseRequestFcn and DeleteFcn used these two lines:
if getappdata(handles.figure1, 'LoopEntered')
setappdata(handles.figure1, 'StopLoop', true);
end
2. Once I was able to stop the endless loop, I used these two lines at the end of each endless loop:
setappdata(handles.figure1, 'LoopEntered', false);
delete(handles.figure1);
to delete the window - I get no errors here.
3. Once I deleted figure1, from unknown reason the pointer returns back to the loop and tries to execute the condition that stops endless loop, attached list of errors:
??? Error using ==> getappdata
Invalid object handle
Error in ==> Demo>uipanel1_SelectionChangeFcn at 266
if getappdata(handles.figure1, 'StopLoop')
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> Demo at 42
gui_mainfcn(gui_State, varargin{:});
Error in ==>
@(hObject,eventdata)Demo('uipanel1_SelectionChangeFcn',get(hObject,'SelectedObject'),eventdata,guidata(get(hObject,'SelectedObject')))
Error in ==> hgfeval at 63
feval(fcn{1},varargin{:},fcn{2:end});
Error in ==> uitools.uibuttongroup.childAddedCbk>manageButtons at 80
hgfeval(cbk, source, evdata);
??? Error using ==> pause
Error while evaluating uicontrol Callback
??? Error using ==> getappdata
Invalid object handle
Error in ==> Demo>uipanel1_SelectionChangeFcn at 352
if getappdata(handles.figure1, 'StopLoop')
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> Demo at 42
gui_mainfcn(gui_State, varargin{:});
Error in ==>
@(hObject,eventdata)Demo('uipanel1_SelectionChangeFcn',get(hObject,'SelectedObject'),eventdata,guidata(get(hObject,'SelectedObject')))
Error in ==> hgfeval at 63
feval(fcn{1},varargin{:},fcn{2:end});
Error in ==> uitools.uibuttongroup.childAddedCbk>manageButtons at 80
hgfeval(cbk, source, evdata);
??? Error using ==> drawnow
Error while evaluating uicontrol Callback
??? Error using ==> getappdata
Invalid object handle
Error in ==> Demo>uipanel1_SelectionChangeFcn at 266
if getappdata(handles.figure1, 'StopLoop')
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> Demo at 42
gui_mainfcn(gui_State, varargin{:});
Error in ==>
@(hObject,eventdata)Demo('uipanel1_SelectionChangeFcn',get(hObject,'SelectedObject'),eventdata,guidata(get(hObject,'SelectedObject')))
Error in ==> hgfeval at 63
feval(fcn{1},varargin{:},fcn{2:end});
Error in ==> uitools.uibuttongroup.childAddedCbk>manageButtons at 80
hgfeval(cbk, source, evdata);
??? Error while evaluating uicontrol Callback
Please advice.
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Walter Roberson
Walter Roberson 2012-7-25
ishandle() is not valid after deletion.
Michael Adelman
Michael Adelman 2012-7-25
Jan, what you say that I need to update before deleting an object?
It's a good idea to use TIMER, but I don't know to use it properly. Once I'll study this I will send some feedbacks about that.

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Michael Adelman
Michael Adelman 2012-7-28
Thank you for your help.
I finally got this the way I want it. Using flags of 'LoopEntered' and 'StopLoop' get the job done. Now I can continue to the next step of the code.
Michael

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