Wow men didnt know they were being deprecated :S I use the following layout for the menu
Qt Code: 
  1. ui->menuBar->setStyleSheet (                 "QMenuBar"
  2.                                                  "{"
  3.                                                  "	background-color: qlineargradient( x1:0, y1:0, x2:0, y2:1, "
  4.                                                  "		stop: 0   #b0c4de, "
  5.                                                  "		stop: 0.8 #e6e6e8, "
  6.                                                  "		stop: 1   #b0c4de ); "
  7.                                                  "	margin:           0px; "
  8.                                                  "	padding:          5px; "
  9.                                                  "	spacing:          5px; "
  10.                                                  "}"
  11.                                                  "QMenuBar::item"
  12.                                                  "{"
  13.                                                  "	background-color: qlineargradient( x1:0, y1:0, x2:0, y2:1, "
  14.                                                  "		stop: 0   #b0c4de, "
  15.                                                  "		stop: 0.8 #c8dcf6, "
  16.                                                  "		stop: 1   #4682b4 ); "
  17.                                                  "	border-width:  1px; "
  18.                                                  "	border-color:  darkkhaki; "
  19.                                                  "	border-style:  solid; "
  20.                                                  "	border-radius: 5px; "
  21.                                                  "	margin:        3px; "
  22.                                                  "	padding:       4px; "
  23.                                                  "	spacing:       20px; "
  24.                                                  "}"
  25.                                                  "QMenuBar::item:selected { /* when selected using mouse or keyboard */"
  26.                                                      "background: #a8a8a8;"
  27.                                                  "}"
  28.                                                  "QMenuBar::item:pressed {"
  29.                                                      "background: #888888;"
  30.                                                  "}"
  31.                                                  "QMenu {"
  32.                                                       "background-color: white;"
  33.                                                       "margin: 5px; /* some spacing around the menu */"
  34.                                                       "width: 180px;"
  35.                                                   "}"
  36.                                                   "QMenu::item {"
  37.                                                       "padding: 10px 28px 10px 23px;"
  38.                                                       "font: bold 12px;"
  39.                                                       "border: 1px solid transparent; /* reserve space for selection border */}"
  40.                                                   "QMenu::item:selected {"
  41.                                                         "border-color: darkblue;"
  42.                                                         "background: rgba(100, 100, 100, 150);"
  43.                                                    "}"
  44.                                                    "QMenu::icon:checked { /* appearance of a 'checked' icon */"
  45.                                                         "background: gray;"
  46.                                                         "border: 1px inset gray;"
  47.                                                         "position: absolute;"
  48.                                                         "top: 1px;"
  49.                                                         "right: 1px;"
  50.                                                         "bottom: 1px;"
  51.                                                         "left: 1px;}"
  52.                                                     "QMenu::separator {"
  53.                                                         "height: 2px;"
  54.                                                         "background: lightblue;"
  55.                                                         "margin-left: 10px;"
  56.                                                         "margin-right: 5px;}"
  57.                                                      "QMenu::indicator {"
  58.                                                         "width: 13px;"
  59.                                                         "height: 13px;}"
  60.  
  61.                                                  );
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