Thanks
answer
Qt Code:
  1. // pTee is the QTreeWidget
  2.  
  3. bConnect = connect( pTree->header(), SIGNAL( sectionDoubleClicked(int) ), this, SLOT( treeHeaderDoubleClick(int) ) );
  4.  
  5. treeHeaderDoubleClick(int)
  6. {
  7. // What ever you wont to do in click this event
  8. }
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