Icon not appearing in app

Hi,

I am creating an app (for the first time) and the following is just a demo. I have defined an icon which appears in the button as you can see below. I'm also expecting it to appear on the top banner. I'm assuming that's what the settings were for.

App appearance

CatedemoUIFigure settings

Code snippet for creation

 % Component initialization
  methods (Access = private)

    % Create UIFigure and components
    function createComponents(app)

      % Get the file path for locating images
      pathToMLAPP = fileparts(mfilename('fullpath'));

      % Create CatedemoUIFigure and hide until all components are created
      app.CatedemoUIFigure = uifigure('Visible', 'off');
      app.CatedemoUIFigure.Position = [100 100 161 322];
      app.CatedemoUIFigure.Name = 'Cate demo';
      app.CatedemoUIFigure.Icon = fullfile(pathToMLAPP, 'cellxica.png');
      app.CatedemoUIFigure.Tag = 'icon';

Code snippet after all components are created

 % Show the figure after all components are created
      app.CatedemoUIFigure.Visible = 'on';

Thank you.

[Ramtej]

Typically, the provided code and settings should suffice. However, there are a couple of steps you might have overlooked:

• Ensure that "cellxica.png" is not corrupted.
• Ensure that your "cellxica.png" file is located in the same directory as your "app.mlapp" file.
• Remember to include this directory in your MATLAB path.

[Peter]

Thank you for the reply.

The png is OK as it renders in the button.

It's definately in the same folder.

The path is included by the app designer and it is immutable.

% Get the file path for locating images
      pathToMLAPP = fileparts(mfilename('fullpath'));

The top if the app only has the title and a close button. I was expecting a minimize and maximize too. Perhaps the place holder for the image is missing so it has nowhere to render it to?

[Peter]

It appears that I have misinterpreted which icon this is. It does apper as the image when doing Alt-Tab, switching between applications.

Every day is a school day.

Answer 1

[Peter]

The icon is for displaying with Alt-Tab.

Answer 2

[prabhat kumar sharma]

Hi Peter,

If you'd like the same icon to appear in the top banner as well, you'll need to set the Icon property within the Identifier section of app.UIFigure.

Hope this helps!

[Peter]

Hi Prabhat,

Thank you for your reply. This is what I was expecting but only the applications icon is changed (e.g. alt-tab). The app designer does not give a minimise or maximise button on the top banner by default. There is a Matlab example...

f = msgbox("Operation Completed");

Which the demo should look like this...

Mine looks like this...

I'm using Matlab R2024a on Linux. The previous version did this too.

Thanks

Peter.

Answer 3

[Peter]

In Ubuntu, I had to use gnome-tweaks to enable the minimise and maximise button. So I now get this in MATLAB and all other Ubuntu apps!

Still no icon on the left hand side.