Qt: UpdateDialog: use dynamic event IDs

modules/gui/qt4/dialogs/help.cpp

@@ -141,13 +141,18 @@ static void UpdateCallback( void *data, bool b_ret )
     QEvent* event;
 
     if( b_ret )
-        event = new QEvent( (QEvent::Type)UDOkEvent );
+        event = new QEvent( UpdateDialog::UDOkEvent );
     else
-        event = new QEvent( (QEvent::Type)UDErrorEvent );
+        event = new QEvent( UpdateDialog::UDErrorEvent );
 
     QApplication::postEvent( UDialog, event );
 }
 
+const QEvent::Type UpdateDialog::UDOkEvent =
+        (QEvent::Type)QEvent::registerEventType();
+const QEvent::Type UpdateDialog::UDErrorEvent =
+        (QEvent::Type)QEvent::registerEventType();
+
 UpdateDialog::UpdateDialog( intf_thread_t *_p_intf ) : QVLCFrame( _p_intf )
 {
     /* build Ui */

modules/gui/qt4/dialogs/help.hpp

@@ -65,13 +65,12 @@ public slots:
 
 #ifdef UPDATE_CHECK
 
-static const int UDOkEvent = QEvent::User + DialogEventTypeOffset + 21;
-static const int UDErrorEvent = QEvent::User + DialogEventTypeOffset + 22;
-
 class UpdateDialog : public QVLCFrame, public Singleton<UpdateDialog>
 {
     Q_OBJECT
 public:
+    static const QEvent::Type UDOkEvent;
+    static const QEvent::Type UDErrorEvent;
     void updateNotify( bool );
 
 private: