I declare it in the connect :
Qt Code: 
  1. connect( qArchiv, SIGNAL( clicked( const QModelIndex &) ), 
  2.                 this, SLOT( selectmsg( const QModelIndex &) ) );
To copy to clipboard, switch view to plain text mode 
archiv.h
Qt Code: 
  1. #ifndef ARCHIVES_H
  2. #define ARCHIVES_H
  3.  
  4. #include <qdialog.h>
  5.  
  6. #include <QtCore>
  7. #include <QtGui>
  8.  
  10. class QTreeView;
  12.  
  13. class Archives : public QDialog
  14. {
  15.     Q_OBJECT
  16.  
  17. public:
  18.   Archives( QWidget *parent = 0 );
  19.   ~Archives();
  20.  
  21.   QString getFileName( const QModelIndex & );
  22.  
  23. protected slots:
  24.   void selectmsg( const QModelIndex & );
  25.  
  26.  
  27. private:
  29.   QTreeView *qArchiv;
  30.   QPushButton *pbOk;
  31.  
  32.   void addArchiv( QString sDate, QString sDest, QString sMsg );
  33.   void remplirArchiv();
  34.  
  35. };
  36.  
  37. #endif
To copy to clipboard, switch view to plain text mode 


Qt Code: 
  1. //****************************************************************
  2. void ApplicationWindow::archives()
  3. {
  4.   Archives Archives_dlg( this );
  5.   if ( Archives_dlg.exec() )
  6.   {
  7.     QStringList ret = Destinataires_dlg->getDestList();
  8.      QString qS = Archives_dlg.getFileName(const QModelIndex idx);  // 181
  9.   }  
  10. }
To copy to clipboard, switch view to plain text mode 

only the second line which uses QModelIndex fails:
181 C:\Qt\test\sms\menu.cpp expected primary-expression before "const"