Using uialert with uiwait and uiresume

Hi all, I have a GUI where asks the user to save a file. I check the filename and depending on the result either carry on or ask the user to change it. All of this is contained within a while loop so that it will continually loop around until the checks have passed or the user has cancelled.

Within this loop I have the alert that pops up stating the error

uialert(app.mainGuiUIFigure,{'New file name must not be the same as the default name, choose another'},'File name error','Icon','warning');

I want this to block execution of the code until the user presses ok. So I have tried using uiwait

uialert(app.mainGuiUIFigure,{'New file name must not be the same as the default name, choose another'},'File name error','Icon','warning','CloseFcn','uiresume');
uiwait

but it creates a blank figure window first. It will stop execution and will only resume once I close the alert window, but this new figure has popped up. How do I prevent this figure window from popping up? Is there a better way to do what I want?

I have successfully used waitfor(warndlg(...)); before, but as this is in appdesigner, I thought I'd use the new dialogue boxes to match the newer GUI graphics stlye.

Matlab 2017b, Windows 7-64bit

Answer 1

[Alexander Kornegay]

Try this instead:

uialert(app.mainGuiUIFigure,{'New file name must not be the same as the default name, choose another'},'File name error','Icon','warning','CloseFcn','uiresume(gcbf)');
uiwait(gcbf)

This will use the current figure instead of creating a new one in the process.

[Vas]

This works great. I have had to make some changes to my code to get around this, but I can definately use this in the future. Thanks

[Andrew Diamond]

This doesn't seem to work for me as calling uiwait(gcbf) waits on my app window and so the only way to get past the uiwait(gbcf) is to close the app itself (gbcf being isequal to my app's main figure so in the given example , isequal(app.mainGuiUIFigure, gbcf)). Am I missing something?

[Adam Gogacz]

I don't believe this answers the OP question. Assume you have a figure with a whole bunch of buttons and other controllers. Now, assume that when you press one of the buttons, the callback executes some code and checks for data conditions, assume now that you pop up an "uialert" dialog, BUT you don't want to proceed with the code UNTIL the alert dialog box is closed. Unlike "warndlg", which returns the hosting figure's handle, uialert returns nothing that we can use to "waitfor".

[Adam Gogacz]

Actually, "uiconfirm" with the "Option" set to "OK" will do. Make sure you are assigning the call to "uiconfirm" to a dummy variable to pause the execution.

[David Young]

Thank you Adam Gogacz, both for the analysis and the suggestion to use uiconfirm. But what a shame that uialert doesn't return an object to wait for - that greatly limits the situations where it's useful.

Answer 2

[lihiniya]

You can use uiconfirm instead of uialert.

answr=uiconfirm(app.AiDAAnalysisV201alphaUIFigure,...
    "New file name must not be the same as the default name, Choose another",...
    "Warning",'Options',"OK",'Icon','warning');

You don't need to do anything with returned selection, because there's one possible option "OK".

[Nick]

important, however, that there is an assignment to something ('answr' in the example ablve). If you keep it as simple as

uiconfirm(app.AiDAAnalysisV201alphaUIFigure,...
    "New file name must not be the same as the default name, Choose another",...
    "Warning",'Options',"OK",'Icon','warning');

the application continues, without pause on the opening of the confirmation dialog

Answer 3

[Ron Fredericks]

I thank that Vas almost had the correct answer with:

uialert(app.mainGuiUIFigure,{'New file name must not be the same as the default name, choose another'},'File name error','Icon','warning','CloseFcn','uiresume');

Try this instead, it works for me when I need to wait for a response then close out the window (Note the @ sign). Also no uiwait required:

uialert(app.mainGuiUIFigure,{'New file name must not be the same as the default name, choose another'},'File name error','Icon','warning','CloseFcn',@(h,e) close(app.mainGuiUIFigure));

More details here:

https://www.mathworks.com/matlabcentral/answers/503729-how-to-close-the-figure-contain-the-uifigure-after-the-alert-is-closed#answer_413884

Answer 4

[Marco Avalos]

I use a line creating a variable which is the uifigure that I am using for the app, and then use UIconfirm and that did the job. these are the lines I used

fig = app.figure1; % In app designer this is the main UIfigure for your GUI

uiconfirm(fig,'Please select one option','Selection error');