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Appdesigner window ends up in background after uigetfile

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Fredrik Wallén
Fredrik Wallén on 19 Jul 2016
Edited: Mario Malic on 12 Sep 2020
I am creating a graphic program using appdesigner but when I call a function where the user can choose a file (uigetfile) the figure window is often put behind some other of my open windows after the file has been chosen. For example if I have a word document open at the same time as my program, the word document gets focus when the file has been chosen and I have to click at the bottom bar to get back to my program. I was using GUIDE before and then I didn't have that problem. I am running on Windows. Is there a way to solve this?
  2 Comments
Chris McRaven
Chris McRaven on 16 Jun 2017
I am also seeing this problem. I think this is unexpected behavior. The focus should return to the uifigure which called uigetfile(). My steps to reproduce are
  1. Make a mlapp in App Designer that has a button that calls uigetfile()
  2. Run the new program from App Designer
  3. Click on the Matlab main window
  4. Click back on the new program
  5. Click the button which calls uigetfile()
  6. Select a file, and click 'open'
  7. Focus will return to the Matlab main window, not the new program as expected
This also works if I have another figure window open. That is, if I click away from the new program to any open figure window, then click back to the new program to run uigetfile(), the focus is returned to that open figure window.
I've tried calling figure(app.NewProgram) immediately after to no effect. I have also tried various drawnow calls as described below, but none worked. Has anybody found a workaround?

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Accepted Answer

Friedrich
Friedrich on 6 Sep 2019
Edited: Friedrich on 6 Sep 2019
For MATLAB R2018a and newer you can use the figure command to focus your app again,
uigetfile; % Could be other dialogs here
drawnow;
figure(app.UIFigure)
For releases prior either turn the visibility off and on again or use the attached p file (change extension from .zip to .p). The usage then would be
uigetfile; % Could be other dialogs here
drawnow;
FocusUIFigure(app.UIFigure)
  4 Comments
Mario Malic
Mario Malic on 12 Sep 2020
The answer works for me, but my window flickers for a moment Which is a little bit annoying. It seems that after exiting uigetdir command window gets focused by default. Did anyone experience this?
Note: App window flickers if MATLAB main window and App are on the same monitor, and MATLAB window not minimised..

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More Answers (6)

Chris McRaven
Chris McRaven on 16 Jun 2017
I believe I have a (somewhat ugly) workaround. Immediately after calling uigetfile(), simply make the main uifigure window invisible and then visible. Assuming the name of your uifigure window is 'UIFigure', add
...
filename = uigetfile(...);
app.UIFigure.Visible = 'off';
app.UIFigure.Visible = 'on';
...
right after the call to uigetfile().
  13 Comments

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Tomas Åhlman
Tomas Åhlman on 12 Jun 2018
Try using:
filename = uigetfile(...); figure(app.UIFigure);
(assuming UIFigure is the name of your main window)

WTxnitz
WTxnitz on 20 Apr 2020
All these answers address getting the app window back as focus after uigetfile.
The other side of the problem for me is the uigetfile dialog itself launches behind all other windows.
Here is a workaround I found. This works on 2020a and macOS Mojave
% open dummy figure
f=figure();
%bring figure to front focus
drawnow;
%the uigetfile dialog now opens properly in front focus
[xl_file,xl_path] = uigetfile('*.*');
% after user closes dialog
% delete dummy
delete(f);
%use solution elsewhere to return focus to app
app.your_app_here.Visible = 'off';
app.your_app_here.Visible = 'on';
This seems to work both from within the app embedded code and with "external" files
in the main Matlab window.
  2 Comments
WTxnitz
WTxnitz on 27 May 2020
Good answer. I'll give it a try.
Alternately, I use the figure title and a text box to replace the title argument macOS doen't honor.
If you play around, you can size and position the figure as a backdrop to the dialog.
I even roughly compensate for different screen resolutions.

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Syed Hussain
Syed Hussain on 25 Jan 2019
Hi
Its is really strange behaviour
My Solution was just to use
...
filename = uigetfile(...);
app.UIFigure.Visible = 'on';
...
It removed the glichy behaviour.
Thanks

Riyadh Abbas
Riyadh Abbas on 26 May 2017
Hi there, I found a solution to this issue provided by http://undocumentedmatlab.com/blog/solving-a-matlab-hang-problem, which suggested adding two lines drawnow; pause(0.05);
I tried it and it did work for me, hope can solve your problem.
  4 Comments
James Ryan
James Ryan on 6 Dec 2017
Perhaps you misread the question. This is not a hang (as in your link). The window simply end up behind others.

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