How to create a QComboBox pop up items with button style?

Hi I have a 3 items combobox, I want to view them as button style. Any advice?

You could start by explaining what you mean by "view them as button style"

Sorry for my English, :-)

I want to flat Drop-down Button for ComboBox.

If you mean to have a customized combobox with your own close buttons then you just need to overwrite the paint function.