replaced previous workaround on thumbnail views by a fix

src/board/UBBoardController.cpp

@@ -1592,10 +1592,6 @@ void UBBoardController::setActiveDocumentScene(UBDocumentProxy* pDocumentProxy,
 
     if (sceneChange)
     {
-        //should not be necessary, but no more time to investigate on it for the moment :
-        //for some reason, certain thumbnail views are not updating except if we load the document twice....
-        //the only workaroud I found for the moment..
-        emit initThumbnailsRequired(this);
         emit activeSceneChanged();
     }
 }
@@ -1810,6 +1806,7 @@ void UBBoardController::selectionChanged()
 {
     updateActionStates();
     emit pageSelectionChanged(activeSceneIndex());
+    emit updateThumbnailsRequired();
 }
 
 

src/core/UBPersistenceManager.cpp

@@ -179,10 +179,11 @@ void UBPersistenceManager::errorString(QString error)
 
 void UBPersistenceManager::onSceneLoaded(QByteArray scene, UBDocumentProxy* proxy, int sceneIndex)
 {
+    Q_UNUSED(scene);
     qDebug() << "scene loaded " << sceneIndex;
     QTime time;
     time.start();
-    mSceneCache.insert(proxy,sceneIndex,UBSvgSubsetAdaptor::loadScene(proxy,scene));
+    mSceneCache.insert(proxy, sceneIndex, loadDocumentScene(proxy, sceneIndex));
     qDebug() << "millisecond for sceneCache " << time.elapsed();
 }
 

src/gui/UBBoardThumbnailsView.cpp

@@ -175,6 +175,7 @@ void UBBoardThumbnailsView::updateThumbnailsPos()
     }
 
     scene()->setSceneRect(scene()->itemsBoundingRect());
+    update();
 }
 
 void UBBoardThumbnailsView::resizeEvent(QResizeEvent *event)
@@ -312,11 +313,12 @@ void UBBoardThumbnailsView::dropEvent(QDropEvent *event)
 {
     Q_UNUSED(event);
 
-    UBApplication::boardController->moveSceneToIndex(mDropSource->sceneIndex(), mDropTarget->sceneIndex());
+    if (mDropSource->sceneIndex() != mDropTarget->sceneIndex())
+        UBApplication::boardController->moveSceneToIndex(mDropSource->sceneIndex(), mDropTarget->sceneIndex());
 
     mDropSource = NULL;
     mDropTarget = NULL;
     mDropBar->hide();
 
-    update();
+    updateThumbnailsPos();
 }