tokens: so i turned to reimplementing the mousePressEvent and show the combobox when user right click on the cell , but without any visual cue to tell them which cell can be right clicked on .
ner_tags: O O O O O O B-Function O O O B-User_Interface_Element O O O O O O B-User_Interface_Element O O O O O O O O O O B-User_Interface_Element O O O O O O