Implementing tools, model access, etc.

Hi,

(1) I implemented a new plugin solution and added a tool, action, group and shortcut to it. I can open the tool using the shortcut and the group. However, I'd like to have it always available (such as Project and Structure), but I don't know where to call setAvailable(true) to achieve this goal.

(2) Basically, the tool has to provide an alternative view on the project's logical view. Thus, I need synchronized access to the model. I'm aware of this user guide page. However, I'm unable to reproduce the code. Moreover, ToolSynchronizer appears to be a black box.

(3) To provide the alternative project view. I started extending MPSTree. Is this the most straightforward way?

Any hint, comment and piece of code is greatly appreciated :)

Thanks and cheers,

Ben