[Users] Context menu on rightclick of tree node

[Robert Buckley]

Hi,

I really need to add some great functionality to a project of mine. I would like 
to add a rightclick context menu to each layer in the layer tree which does the 
following.

1. Changes opacity of the layer
2. Offers metadata for that layer
3. Offers a download choice for that layer
4. Offers the ability to remove the layer

I have seen similar things but I am find it very hard to even start to think 
where to start.

Has anyone does this before?

thanks for any help,

Robert

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