title: ComboBox Qt Creator - how to create an event?
body: <p>I have a Qt Form that contains 2 combo box messages. The second combobox message depends on the first combo box message. I mean that the dates from the second combobox message depends on the element that I select in the first combobox. 
  In this moment I have different dates in the first combobox. But the second combobox is not working. I need to creare a connect method or what?
  Thx! APpreciate!
  Could someone give me a short example?</p>