[Drawkit] Drawing Changed Indicator?

[Allan Daly]

Hi Graham,

I'm using DK drawings and views in my application and I'm at a point  
where it would be useful to be able to know if a user has changed the  
content or configuration of a drawing such that it needs to be saved.  
Is there a way to look at the properties of a drawing or drawing view  
and find out if the drawing has been changed since the last save?

I'm not using DKDrawingDocument objects -- just straight DKDrawings  
and DKDrawingViews.

Thanks for any ideas you might have.

-Allan