🚀 go-pugleaf

> Could someone provide me with  sample code to prevent users from opening
> or instatiating a window that is already open or instantiated??. Thanks
> a lot!!

In one way or another, you are going to have to keep track of the windows
that you have created.  I use a class I call Application to keep track of
the open forms.  Instead of doing:

MyFrame frame = new MyFrame();

I do:

MyFrame frame = Application.createForm(MyFrame.class);

The createForm method of the Application class checks to see if another
other instances of MyFrame exist, and if so, it returns that instance.
Otherwise, it creates a new MyFrame instance, adds it to an internal Vector,
adds a listener to determine when the window is closed (so that it can
remove it from the internal Vector), and returns the new instance.

This can be handle similarly if you put this type of logic in your Frame
constructor.  All of your application's frames could then descend from your
custom frame that handles this behavior.

Hope this helps,
Jason