How to use dialog boxes

Hi all,

Hope anyone can clear this up to me. Following the document:

https://it.mathworks.com/help/matlab/creating_guis/update-dialog-boxes.html

What if I want to produce a dialog box without a figure fig below?

Or just resize the figure to be the equal to the dialog box. I've tried looking at the figure properties but found nothing about the size of the window.

Thanks!

Answer 1

[Rahul]

Hi @Iacopo,

According to the steps given in the following documentation: https://it.mathworks.com/help/matlab/creating_guis/update-dialog-boxes.html

If you open a dialog box while creating an app, then the dialog box gets created within the 'uifigure' of the App.

If you require to produce the dialog box and not see the figure of the App below, you can use 'set' function on the 'Visible' property of the 'app.UiFigure'. Here is an example which I have added to a 'ButtonPushed' callback of an App:

function ButtonPushed(app, event)
    set(app.UIFigure,'Visible', 'off');
    e = errordlg("Operation unsuccessful","Error");
    uiwait(e);
    set(app.UIFigure,'Visible', 'on');
    
    % close(app.UIFigure); Use 'close' function if the App is required to
    % be closed 
end

Also, a dialog box can be created without creating an App. Hence if the workflow does not require creation of an App's Figure, then dialog boxes can directly be created using functions like 'errordlg', 'warndlg' etc anywhere in a MATLAB file. Here is an example:

warndlg("This operation cannot be undone","Warning");

Refer to the following MATLAB documentations to know more:

'dialog': https://www.mathworks.com/help/releases/R2022a/matlab/ref/dialog.html

'Figure Properties': https://www.mathworks.com/help/releases/R2022a/matlab/ref/matlab.ui.figure-properties.html

'close': https://www.mathworks.com/help/releases/R2022a/matlab/ref/close.html

Hope this helps! Thanks.