How can I implement singleton behavior for a programmtically created GUI?

I am creating a GUI programmatically. However I require the singleton GUI behavior for my project. (i.e. if the user tries to run a second instance of my program it only brings the current singleton into focus and does not destroy any objects).

Answer 1

[MathWorks Support Team]

The singleton behavior can be implemented by querying for the tag of the GUI under the root object. If the GUI has been launched , the GUI will be a child of the root object. If the GUI has not been launched, it will not be found and the GUI can be launched.

The following code demonstrates this

function my_gui()

%Search if the figure exists

h = findall(0,'tag','my_gui');

if (isempty(h))

      %Launch the figure

      figHandle = figure('tag','my_gui');

      plot(rand(4,4));

      set(figHandle,'handlevisibility','callback');

else

      %Figure exists so bring Figure to the focus

      figure(h);

end;