That's exactly what I was thinking about after I wrote my first message. I could do this in the Commands that load / unload the data. I have to check there if the data is already loaded anyway, so that could be the right place to track which window is using the data.
--- In [email protected], "jer_ela" <[EMAIL PROTECTED]> wrote: > > I assume that when a new window is opened you have an event that > causes the data it needs to be loaded into the model locator. And you > will probably have a check to see if the data is already loaded so you > don't load it twice. > > Just keep track in the model of how many users there are for that > data. When windows close or otherwise no longer need the data have > them send an event that causes the counter to decrement. When it gets > to 0 you can unload the data.
