Can I use a button to stop a GUI and the function and the script that started it?

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Ben Ruppel
Ben Ruppel 2012-3-29
评论： Josh Philipson 2015-11-12
Hello I'm sorry if there is an answer out there but I haven't been able to find it. I have a script which runs a script which calls a function which launches a GUI. Is it possible to have a button in the GUI that will exit the GUI, the function, and the script (basically an abort button)?
To exit the GUI I have: delete(handles.figure1) return;
but it seems that "return" runs the gui exit code because I get the following error when I hit the button:
??? Attempt to reference field of non-structure array.
Error in ==> a2_QueryLoopGUI>a2_QueryLoopGUI_OutputFcn at 74
varargout{1} = handles.output;
Any ideas? Do I have to pass an exit variable out through varargout to the function and then from the function into the script?
Thanks!

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回答（1 个）

Sean de Wolski
Sean de Wolski 2012-3-29
Sure.
Have the GUI, on exit by pushing a quit button (or the red 'x'), return a flag that when returned, is checked for in the function, which return from the function etc.
Or just have it throw an error.
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Ben Ruppel
Ben Ruppel 2012-3-29
Okay, so for the record I ended up creating a abortStatus variable that travels all the way up the chain of calls in order to end everything. This seems like doing it the long way.
Learning how to return a value from the GUI along with exiting the GUI resuming flow control wasn't simple.
The guidelines for what worked for me are:
put uiwait(handles.figure1) in the xxx_OpeningFcn block
put the following 2 lines in the xxx_OutputFcn block:
-varargout{1} = handles.output;
-delete(handles.figure1)
put uiresume(handles.figure1) in the callback for any button that will result in the GUI closing, after anything else it does.
if you want to assign output data in a block of code (in the callback for a button for instance), assign the data like:
handles.output = 'outputtext';
then: guidata(hObject.handles) which makes the data you added to hObject "stick" to the shared data of the gui.

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