Creating mleader after text moving

[Anonymous]

Hi all,

I want to create a block according to the following concept:

1. There are three main block's initial entities: Circle, Text 1, Text 2. 
Moreover, the insertion block's point is located in the circle's centre:

2. This block use to have two different handles:

First (magenta) - to move all block's entities together using insertion point,

second (blue) - to move only text entities (the circle after using blue handle must save his last position):

3. After using blue handle a special mleader (in sample situation below - line) must be created (green):

4. Also there should be an opportunity to reset position of blue handle, delete created mleader (line) and return initial entities:

Thanks in advance. 
Any information would be helpful. I would be happy to watch a screencast.

[Libbya]

Individual grip colors cannot be customized.  Other than that, this shows step-by-step how to do exactly what you have asked for.