Better move the calls to 'viewport()->update()' relating to the ViewerInterface inside the PageView class.

part.cpp

@@ -842,14 +842,12 @@ void Part::showSourceLocation(const QString& fileName, int line, int column, boo
     if( showGraphically )
     {
         m_pageView->setLastSourceLocationViewport( m_document->viewport() );
-        m_pageView->viewport()->update();
     }
 }
 
 void Part::clearLastShownSourceLocation()
 {
     m_pageView->clearLastSourceLocationViewport();
-    m_pageView->viewport()->update();
 }
 
 bool Part::isWatchFileModeEnabled() const
@@ -872,17 +870,12 @@ void Part::setWatchFileModeEnabled(bool enabled)
 
 bool Part::areSourceLocationsShownGraphically() const
 {
-    return Okular::Settings::showSourceLocationsGraphically();
+    return m_pageView->areSourceLocationsShownGraphically();
 }
 
 void Part::setShowSourceLocationsGraphically(bool show)
 {
-    if( show == Okular::Settings::showSourceLocationsGraphically() )
-    {
-        return;
-    }
-    Okular::Settings::setShowSourceLocationsGraphically( show );
-    m_pageView->viewport()->update();
+    m_pageView->setShowSourceLocationsGraphically(show);
 }
 
 void Part::slotHandleActivatedSourceReference(const QString& absFileName, int line, int col, bool *handled)

ui/pageview.cpp

@@ -965,6 +965,21 @@ void PageView::updateActionState( bool haspages, bool documentChanged, bool hasf
     }
 }
 
+bool PageView::areSourceLocationsShownGraphically() const
+{
+    return Okular::Settings::showSourceLocationsGraphically();
+}
+
+void PageView::setShowSourceLocationsGraphically(bool show)
+{
+    if( show == Okular::Settings::showSourceLocationsGraphically() )
+    {
+        return;
+    }
+    Okular::Settings::setShowSourceLocationsGraphically( show );
+    viewport()->update();
+}
+
 void PageView::setLastSourceLocationViewport( const Okular::DocumentViewport& vp )
 {
     if( vp.rePos.enabled )
@@ -978,6 +993,7 @@ void PageView::setLastSourceLocationViewport( const Okular::DocumentViewport& vp
         d->lastSourceLocationViewportNormalizedY = 0.0;
     }
     d->lastSourceLocationViewportPageNumber = vp.pageNumber;
+    viewport()->update();
 }
 
 void PageView::clearLastSourceLocationViewport()
@@ -985,6 +1001,7 @@ void PageView::clearLastSourceLocationViewport()
     d->lastSourceLocationViewportPageNumber = -1;
     d->lastSourceLocationViewportNormalizedX = 0.0;
     d->lastSourceLocationViewportNormalizedY = 0.0;
+    viewport()->update();
 }
 
 void PageView::notifyViewportChanged( bool smoothMove )

ui/pageview.h

@@ -103,6 +103,9 @@ Q_OBJECT
         QPoint contentAreaPosition() const;
         QPoint contentAreaPoint( const QPoint & pos ) const;
 
+        bool areSourceLocationsShownGraphically() const;
+        void setShowSourceLocationsGraphically(bool show);
+
         void setLastSourceLocationViewport( const Okular::DocumentViewport& vp );
         void clearLastSourceLocationViewport();
     public slots: