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How do I make an App written in App Designer Modal?

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Steve Page
Steve Page on 8 Jun 2018
Answered: Michael Kaiser on 26 Mar 2021
I want to call an App written in App Designer from another App written in App Designer. While the called App is running I do not want the user to be able to interact with the calling App. How do I make the called App Modal? The WindowsStyle property of the class matlab.ui.Figure is not accessible.

Answers (3)

Chris Portal
Chris Portal on 10 Jun 2018
If you're using 18a or later, you can try using UIPROGRESSDLG to create an indeterminate progress bar while the secondary app is open. It's not the same modal behavior WindowStyle would give, but it achieves the same task:

CHAI YUAN
CHAI YUAN on 29 Mar 2019
Edited: CHAI YUAN on 29 Mar 2019
Class 'test1' is the parent window
Class 'test2' is the child window
test1:function ButtonPushed(app, event)
d = uiprogressdlg(app.test1UIFigure,'Message','Child window detected.');
app.test2Obj = test2;
% (Write your original code here.)
while 1
if exist([cd,'\CYcloneX'],'dir')
break;
end
pause(0.01)
end
close(d);
rmdir([cd,'\CYcloneX'],'s')
test2:function test2UIFigureCloseRequest(app, event)
mkdir([cd,'\CYcloneX'])
delete(app)

Michael Kaiser
Michael Kaiser on 26 Mar 2021
The MATLAB function waitfor() may be used.
For example, here is a button pushed callback in an AppDesigner UI that calls another AppDesigner UI to view and modify settings (app.SPSettings):
% Button pushed function: SigProcSettingsButton
function SigProcSettingsButtonPushed(app, event)
% Save a copy of the current signal processing settings
SPSOld = app.SPSettings;
% Invoke AppDesigner UI to observe and modify settings
hDlg = EditVWW2SigProcParams(app.SPSettings);
% Wait for App Designer UI to close (modal behavior)
waitfor(hDlg);
% If settings have been changed, update them in the the engine
if ~isequal(app.SPSettings, SPSOld)
app.RTDBE.UpdateSPSettings(app.SPSettings);
end
end
Hope this helps!

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