Is it possible to detect when a gui moves to the background?

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Nick
Nick 2013-7-25
Hello all,
I use one main-gui for entering parameters when a sub-gui does calculations in the background.
Is it possible to detect when a gui moves to the background? And if so how do I program my sub-gui to reload variables when this happens?
An user has the ability to click on the minimize button or just click on a different gui.
When the user reopens the sub-gui I need the value’s to reset.
SimpleExample
%InputsMaingui
Ingreadients.Suger =3;
Ingreadients.flour = 1;
Open subgui
%show output:
Ingreadients.Suger =3;
Ingreadients.flour = 1;
*click on main window in the back
%change value's
Ingreadients.Suger =50;
Ingreadients.flour = 4;
*click on subgui *this is when it goes wrong and the gui uses the wrong data.
%show output
Ingreadients.Suger =3;
Ingreadients.flour = 1;
this happens cause the users dont "restart" the sub-gui so I want the sub-gui to restart everytime it has been to the background.
Or a method that forces an user to close the sub-gui before he/she can click anywere else. Like when an error message pops up you have to pres "ok" before you can continue any other operation
Regards, Nick

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Jan
Jan 2013-7-25
编辑：Jan 2013-7-26
There is no documented method to achieve this, but an undocumented one:
FigH = gcf; drawnow;
jFrame = get(handle(FigH), 'JavaFrame');
% [EDITED]
try
jProx = jFrame.fFigureClient.getWindow;
catch
jProx = jFrame.fHG1Client.getWindow;
end
% [/EDITED]
set(jProx, 'WindowLostFocusCallback', {@figLostFocus, FigH});
function figLostFocus(jProx, EventData, FigH)
disp(clock) % Dummy for testing
Is is recommended to set this into a TRY/CATCH-Block and simply a useful error message, when it fails. The shown method might fail in future Matlab version as all undocumented features.
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Jan
Jan 2013-7-26
Please post which Matlab version you are using.
Do you mean:
figure('WindowStyle', 'modal')
See [EDITED] for a possibly working fallback. But remember that such errors are typical of undocumented methods.
Nick
Nick 2013-7-29
I am using Matlab R2012b.
And indeed
figure('WindowStyle', 'modal')
is the code im looking for thanks allot!

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