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

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!

Answer 1

[Sean de Wolski]

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.

[Ben Ruppel]

I am avoiding errors and trying to make sure all variables are cleaned up for a production environment.

So delete(handles.figure1) closes the gui and... return returns control to the function that called the gui? Maybe I also have to run uiresume as well, I'm not sure.

[Ben Ruppel]

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.

[Josh Philipson]

Ben, Thanks for posting this.