interact/Click on a draggable line/rectangle to open a menu ?

Hello. after drawing a line or a rectangle interactively using "drawline" and drawrectange" in a GUI axes, what I want now is that when I click on the line/rectangle, a menu (or another GUI) will open ? can you please help me with this?

after searching , I found "UIContextMenu" and 'ButtonDownFcn' , but I didnt succeed to implement them

thank you

Mohamad