How to add pull down list inside a button

How can I create a button with pull down list inside of button

Examples:

Attachment 12555

Attachment 12556

clicking on the arrow -> accesses the pull down list

Thanks,

Lamar

Its not a button with a pull down list its a pull down list which is styled.
You can either implement a style on a regular QComboBox or subclass it and override its paintEvent().