Catch Dynamic Block Visibility Change Event

[Hugh_Compton]

Does anyone know how to catch the end of the Dynamic Block Visibility change event?  Since this isn't a command I'm a bit foxed.

[norman.yuan]

manupulating dynamic block by user (dragging/clicking grips) certainly triggers events that can be handled with .NET API.

You can write some code handle Documnet.CommandWillStart/CommandEnded, something like:

    Editor.WriteMessage("\nCurrentCommand is: {0}.", e.GlobalCommandName);

and then munipulate a dynamic block iin a drawing to verify the code in the 2 event handlers running. You should see that the implicit command triggered when you drag/click a dynamic block's grip is either "GRIP_POPUP" or "GRIP_STRETCH".

I am not sure your purpose of catching these events, but it is likely that you need to start from handling these 2 events and filter out specific command name (GRIP_POPUP and GRIP_STRETCH, and maybe others), and then incorporate with other event handlers (such as Database.ObjectModified...), to eventually be able to do something meaningful.

[Hugh_Compton]

Thanks Norman, you pointed me in the right direction. 

I had to give up in the end though since I wasn't sure if the 'overhead' was worth the gains.  It was a routine to grab the information of the visible entites in a dynamic block and add that information to the dynamic block itself.  This works with a command reactor on the Save Event but not the dynamic Block change event.  i bacame a bit "tangled" with code that I didn't fully understand...!

[norman.yuan]

Additional information, although you may have decided not pursuing this route:

I have an article on handling dynamic block property being changed. Although it is about a "stretch" dynamic property, the logic of algrithm would be the same or very similar. I forgot to mention it in my previous reply. Here is the link, just in case you have not seen it or it may be of help:

 http://drive-cad-with-code.blogspot.ca/2013/11/a-block-with-auto-pointing-leader.html