how can i access a QString ill show my code on how im trying to do this

bottom.h

Qt Code: 
  1. extern QString *buttonFV;
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then in bottom.cpp

Qt Code: 
  1. while(iconmodel->query().next())
  2.     {
  3.       buttonFV = iconmodel->query().value(0).toString();  // String I'm Tring to get the value from in a slot
  4.  
  5.         emit next_DoStyle();
  6.  
  7.  
  8.     }
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SLOT in bottom.cpp

Qt Code: 
  1. void ttmbottom::do_Style()
  2. {
  3.  
  4.     QString bttnPath;// = QApplication::applicationDirPath();
  5.     bttnPath = "/home/dev/ttm/directory/icon/";
  6.     bttnPath += buttonFV;  // trying to use it here !!!!!
  7.  
  8.  
  9.  
  10. }
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if anyone can help me solve this issue i always have problems trying to use the data i have stored