How to create a dropdown checkbox in Qt?

Anyone has idea about how to create a dropdown checkbox in Qt?

It is a drop-down box whose items has check-box so that user can check multiple items. Here is an example but it is done in ASP.NET, http://ift.tt/1nzAy01. I want to do this in Qt. I can't find any existing widget that does this. Am I missing something? Is this possible? Thank you.

dropdown check box