[news.eclipse.tools.gef] Getting menu on right click of mouse

[gunjan_sir@xxxxxxxxx (Ved Gunjan)]

hi!
i'm facing a situation wherein i have a view called SolutionExplorer in 
my application and this view has categories which has my model objects.
somthing like this..
In SolutionExplorer view.
category1
|-A
|-B
|-C
category2
category3

here A,B,C are my model objects.
when i right click on any of these model objects ,i should get a drop down 
menu which will have options.
My question is - How will i get a menu on right click of mouse?

im in desperate need for suggestion.
regards
ved