diff --git a/app/savebar.cpp b/app/savebar.cpp
--- a/app/savebar.cpp
+++ b/app/savebar.cpp
@@ -346,17 +346,17 @@
 {
     QList<QUrl> lst = DocumentFactory::instance()->modifiedDocumentList();
     if (action == "first") {
-        goToUrl(lst[0]);
+        emit goToUrl(lst[0]);
     } else if (action == "previous") {
         int pos = lst.indexOf(d->mCurrentUrl);
         --pos;
         Q_ASSERT(pos >= 0);
-        goToUrl(lst[pos]);
+        emit goToUrl(lst[pos]);
     } else if (action == "next") {
         int pos = lst.indexOf(d->mCurrentUrl);
         ++pos;
         Q_ASSERT(pos < lst.size());
-        goToUrl(lst[pos]);
+        emit goToUrl(lst[pos]);
     } else {
         qWarning() << "Unknown action: " << action ;
     }
diff --git a/importer/importer.cpp b/importer/importer.cpp
--- a/importer/importer.cpp
+++ b/importer/importer.cpp
@@ -177,7 +177,7 @@
     d->mJobProgress = 0;
 
     emitProgressChanged();
-    maximumChanged(d->mUrlList.count() * 100);
+    emit maximumChanged(d->mUrlList.count() * 100);
 
     if (!d->createImportDir(destination)) {
         qWarning() << "Could not create import dir";
@@ -204,7 +204,7 @@
 {
     KIO::Job* job = KIO::del(d->mTempImportDirUrl, KIO::HideProgressInfo);
     KJobWidgets::setWindow(job, d->mAuthWindow);
-    importFinished();
+    emit importFinished();
 }
 
 void Importer::advance()
@@ -222,7 +222,7 @@
 
 void Importer::emitProgressChanged()
 {
-    progressChanged(d->mProgress * 100 + d->mJobProgress);
+    emit progressChanged(d->mProgress * 100 + d->mJobProgress);
 }
 
 QList<QUrl> Importer::importedUrlList() const
diff --git a/lib/contextmanager.cpp b/lib/contextmanager.cpp
--- a/lib/contextmanager.cpp
+++ b/lib/contextmanager.cpp
@@ -164,7 +164,7 @@
     }
 
     d->mSelectedFileItemListNeedsUpdate = true;
-    currentUrlChanged(currentUrl);
+    emit currentUrlChanged(currentUrl);
 }
 
 KFileItemList ContextManager::selectedFileItemList() const
@@ -186,9 +186,9 @@
         d->mDirListerFinished = false;
     } else {
         d->mCurrentDirUrl.clear();
-        d->mDirModel->dirLister()->clear();
+        emit d->mDirModel->dirLister()->clear();
     }
-    currentDirUrlChanged(url);
+    emit currentDirUrlChanged(url);
 }
 
 QUrl ContextManager::currentDirUrl() const
diff --git a/lib/crop/croptool.cpp b/lib/crop/croptool.cpp
--- a/lib/crop/croptool.cpp
+++ b/lib/crop/croptool.cpp
@@ -250,7 +250,7 @@
     d->mRect = rect;
     d->keepRectInsideImage();
     if (d->mRect != oldRect) {
-        rectUpdated(d->mRect);
+        emit rectUpdated(d->mRect);
     }
     imageView()->update();
 }
@@ -390,7 +390,7 @@
     d->keepRectInsideImage();
 
     imageView()->update();
-    rectUpdated(d->mRect);
+    emit rectUpdated(d->mRect);
 }
 
 void CropTool::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
@@ -410,7 +410,7 @@
         return;
     }
     event->accept();
-    d->mCropWidget->findChild<QDialogButtonBox *>()->accepted();
+    emit d->mCropWidget->findChild<QDialogButtonBox *>()->accepted();
 }
 
 void CropTool::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
@@ -432,16 +432,16 @@
     switch (event->key()) {
     case Qt::Key_Escape:
         event->accept();
-        buttons->rejected();
+        emit buttons->rejected();
         break;
     case Qt::Key_Return:
     case Qt::Key_Enter: {
         event->accept();
         auto focusButton = static_cast<QPushButton*>(buttons->focusWidget());
         if (focusButton && buttons->buttonRole(focusButton) == QDialogButtonBox::RejectRole) {
-            buttons->rejected();
+            emit buttons->rejected();
         } else {
-            buttons->accepted();
+            emit buttons->accepted();
         }
         break;
     }
diff --git a/lib/datewidget.cpp b/lib/datewidget.cpp
--- a/lib/datewidget.cpp
+++ b/lib/datewidget.cpp
@@ -68,7 +68,7 @@
     {
         mDate = mDate.addDays(delta);
         updateButton();
-        q->dateChanged(mDate);
+        emit q->dateChanged(mDate);
     }
 };
 
diff --git a/lib/document/document.cpp b/lib/document/document.cpp
--- a/lib/document/document.cpp
+++ b/lib/document/document.cpp
@@ -128,7 +128,7 @@
     if (mDownSampledImageMap[invertedZoom].size().isEmpty()) {
         mDownSampledImageMap[invertedZoom] = mImage;
     }
-    q->downSampledImageReady();
+    emit q->downSampledImageReady();
 }
 
 //- DownSamplingJob ---------------------------------------
@@ -320,7 +320,7 @@
         SaveJob* saveJob = static_cast<SaveJob*>(job);
         d->mUrl = saveJob->newUrl();
         d->mImageMetaInfoModel.setUrl(d->mUrl);
-        saved(saveJob->oldUrl(), d->mUrl);
+        emit saved(saveJob->oldUrl(), d->mUrl);
     }
 }
 
@@ -488,9 +488,9 @@
         // If user just undid all his changes this does not really correspond
         // to a save, but it's similar enough as far as Document users are
         // concerned
-        saved(d->mUrl, d->mUrl);
+        emit saved(d->mUrl, d->mUrl);
     } else {
-        modified(d->mUrl);
+        emit modified(d->mUrl);
     }
 }
 
@@ -525,7 +525,7 @@
         d->mCurrentJob = job;
         LOG("Starting first job");
         job->start();
-        busyChanged(d->mUrl, true);
+        emit busyChanged(d->mUrl, true);
     }
     LOG_QUEUE("Job added", d);
 }
@@ -538,8 +538,8 @@
     if (d->mJobQueue.isEmpty()) {
         LOG("All done");
         d->mCurrentJob.clear();
-        busyChanged(d->mUrl, false);
-        allTasksDone();
+        emit busyChanged(d->mUrl, false);
+        emit allTasksDone();
     } else {
         LOG("Starting next job");
         d->mCurrentJob = d->mJobQueue.dequeue();
diff --git a/lib/document/documentloadedimpl.cpp b/lib/document/documentloadedimpl.cpp
--- a/lib/document/documentloadedimpl.cpp
+++ b/lib/document/documentloadedimpl.cpp
@@ -103,16 +103,16 @@
 void DocumentLoadedImpl::setImage(const QImage& image)
 {
     setDocumentImage(image);
-    imageRectUpdated(image.rect());
+    emit imageRectUpdated(image.rect());
 }
 
 void DocumentLoadedImpl::applyTransformation(Orientation orientation)
 {
     QImage image = document()->image();
     QMatrix matrix = ImageUtils::transformMatrix(orientation);
     image = image.transformed(matrix);
     setDocumentImage(image);
-    imageRectUpdated(image.rect());
+    emit imageRectUpdated(image.rect());
 }
 
 QByteArray DocumentLoadedImpl::rawData() const
diff --git a/lib/documentview/abstractimageview.cpp b/lib/documentview/abstractimageview.cpp
--- a/lib/documentview/abstractimageview.cpp
+++ b/lib/documentview/abstractimageview.cpp
@@ -130,9 +130,9 @@
     {
         if (event->modifiers() & Qt::ControlModifier) {
             if (event->button() == Qt::LeftButton) {
-                q->zoomInRequested(event->pos());
+                emit q->zoomInRequested(event->pos());
             } else if (event->button() == Qt::RightButton) {
-                q->zoomOutRequested(event->pos());
+                emit q->zoomOutRequested(event->pos());
             }
         }
     }
@@ -251,7 +251,7 @@
     d->adjustImageOffset(AbstractImageViewPrivate::Silent);
     d->setScrollPos(scroll, AbstractImageViewPrivate::Silent);
     onZoomChanged();
-    zoomChanged(d->mZoom);
+    emit zoomChanged(d->mZoom);
 }
 
 bool AbstractImageView::zoomToFit() const
@@ -274,7 +274,7 @@
     // We do not set zoom to 1 if zoomToFit is off, this is up to the code
     // calling us. It may went to zoom to some other level and/or to zoom on
     // a particular position
-    zoomToFitChanged(d->mZoomToFit);
+    emit zoomToFitChanged(d->mZoomToFit);
 }
 
 void AbstractImageView::setZoomToFill(bool on, const QPointF& center)
@@ -287,7 +287,7 @@
     // We do not set zoom to 1 if zoomToFit is off, this is up to the code
     // calling us. It may went to zoom to some other level and/or to zoom on
     // a particular position
-    zoomToFillChanged(d->mZoomToFill);
+    emit zoomToFillChanged(d->mZoomToFill);
 }
 
 const QPixmap& AbstractImageView::alphaBackgroundTexture() const
@@ -439,11 +439,11 @@
         switch (event->key()) {
         case Qt::Key_Left:
         case Qt::Key_Up:
-            previousImageRequested();
+            emit previousImageRequested();
             break;
         case Qt::Key_Right:
         case Qt::Key_Down:
-            nextImageRequested();
+            emit nextImageRequested();
             break;
         default:
             break;
@@ -502,7 +502,7 @@
 void AbstractImageView::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event)
 {
     if (event->modifiers() == Qt::NoModifier && event->button() == Qt::LeftButton) {
-        toggleFullScreenRequested();
+        emit toggleFullScreenRequested();
     }
 
     d->checkAndRequestZoomAction(event);
diff --git a/lib/documentview/documentview.cpp b/lib/documentview/documentview.cpp
--- a/lib/documentview/documentview.cpp
+++ b/lib/documentview/documentview.cpp
@@ -161,15 +161,15 @@
                 adapter->setScrollPos(mSetup.position);
             }
         }
-        q->adapterChanged();
-        q->positionChanged();
+        emit q->adapterChanged();
+        emit q->positionChanged();
         if (adapter->canZoom()) {
             if (adapter->zoomToFit()) {
-                q->zoomToFitChanged(true);
+                emit q->zoomToFitChanged(true);
             } else if (adapter->zoomToFill()) {
-                q->zoomToFillChanged(true);
+                emit q->zoomToFillChanged(true);
             } else {
-                q->zoomChanged(adapter->zoom());
+                emit q->zoomChanged(adapter->zoom());
             }
         }
         if (adapter->rasterImageView()) {
@@ -296,7 +296,7 @@
         }
         mZoomSnapValues << MAXIMUM_ZOOM_VALUE;
 
-        q->minimumZoomChanged(min);
+        emit q->minimumZoomChanged(min);
     }
 
     void showLoadingIndicator()
@@ -345,7 +345,7 @@
         QObject::connect(anim, SIGNAL(finished()), q, SIGNAL(isAnimatedChanged()));
         anim->setDuration(DocumentView::AnimDuration);
         mFadeAnimation = anim;
-        q->isAnimatedChanged();
+        emit q->isAnimatedChanged();
         anim->start(QAbstractAnimation::DeleteWhenStopped);
     }
 
@@ -697,7 +697,7 @@
 void DocumentView::slotZoomChanged(qreal zoom)
 {
     d->updateCaption();
-    zoomChanged(zoom);
+    emit zoomChanged(zoom);
 }
 
 void DocumentView::setZoom(qreal zoom)
@@ -749,10 +749,10 @@
         d->controlWheelAccumulatedDelta += event->delta();
         // Browse with mouse wheel
         if (d->controlWheelAccumulatedDelta >= QWheelEvent::DefaultDeltasPerStep) {
-            previousImageRequested();
+            emit previousImageRequested();
             d->controlWheelAccumulatedDelta = 0;
         } else if (d->controlWheelAccumulatedDelta <= -QWheelEvent::DefaultDeltasPerStep) {
-            nextImageRequested();
+            emit nextImageRequested();
             d->controlWheelAccumulatedDelta = 0;
         }
         return;
@@ -773,7 +773,7 @@
     // Filter out context menu if Ctrl is down to avoid showing it when
     // zooming out with Ctrl + Right button
     if (event->modifiers() != Qt::ControlModifier) {
-        contextMenuRequested();
+        emit contextMenuRequested();
     }
 }
 
@@ -865,17 +865,17 @@
 
 void DocumentView::emitHudDeselectClicked()
 {
-    hudDeselectClicked(this);
+    emit hudDeselectClicked(this);
 }
 
 void DocumentView::emitHudTrashClicked()
 {
-    hudTrashClicked(this);
+    emit hudTrashClicked(this);
 }
 
 void DocumentView::emitFocused()
 {
-    focused(this);
+    emit focused(this);
 }
 
 void DocumentView::setGeometry(const QRectF& rect)
@@ -903,7 +903,7 @@
     anim->setDuration(DocumentView::AnimDuration);
     connect(anim, SIGNAL(finished()), SIGNAL(isAnimatedChanged()));
     d->mMoveAnimation = anim;
-    isAnimatedChanged();
+    emit isAnimatedChanged();
     anim->start(QAbstractAnimation::DeleteWhenStopped);
 }
 
@@ -920,7 +920,7 @@
 
 void DocumentView::slotFadeInFinished()
 {
-    fadeInFinished(this);
+    emit fadeInFinished(this);
 }
 
 bool DocumentView::isAnimated() const
diff --git a/lib/documentview/messageviewadapter.cpp b/lib/documentview/messageviewadapter.cpp
--- a/lib/documentview/messageviewadapter.cpp
+++ b/lib/documentview/messageviewadapter.cpp
@@ -114,11 +114,11 @@
         switch (event->key()) {
         case Qt::Key_Left:
         case Qt::Key_Up:
-            previousImageRequested();
+            emit previousImageRequested();
             break;
         case Qt::Key_Right:
         case Qt::Key_Down:
-            nextImageRequested();
+            emit nextImageRequested();
             break;
         default:
             break;
diff --git a/lib/documentview/rasterimageview.cpp b/lib/documentview/rasterimageview.cpp
--- a/lib/documentview/rasterimageview.cpp
+++ b/lib/documentview/rasterimageview.cpp
@@ -359,7 +359,7 @@
 
     if (!d->mEmittedCompleted) {
         d->mEmittedCompleted = true;
-        completed();
+        emit completed();
     }
 }
 
@@ -472,7 +472,7 @@
     if (d->mTool) {
         d->mTool.data()->toolActivated();
     }
-    currentToolChanged(tool);
+    emit currentToolChanged(tool);
     update();
 }
 
diff --git a/lib/documentview/svgviewadapter.cpp b/lib/documentview/svgviewadapter.cpp
--- a/lib/documentview/svgviewadapter.cpp
+++ b/lib/documentview/svgviewadapter.cpp
@@ -85,7 +85,7 @@
         mSvgItem->setScale(zoom());
     }
     applyPendingScrollPos();
-    completed();
+    emit completed();
     mImageFullyLoaded = true;
 }
 
diff --git a/lib/documentview/videoviewadapter.cpp b/lib/documentview/videoviewadapter.cpp
--- a/lib/documentview/videoviewadapter.cpp
+++ b/lib/documentview/videoviewadapter.cpp
@@ -163,10 +163,10 @@
             mSeekSlider->triggerAction(QAbstractSlider::SliderSingleStepAdd);
             break;
         case Qt::Key_Up:
-            q->previousImageRequested();
+            emit q->previousImageRequested();
             break;
         case Qt::Key_Down:
-            q->nextImageRequested();
+            emit q->nextImageRequested();
             break;
         default:
             break;
@@ -272,7 +272,7 @@
         d->keyPressEvent(static_cast<QKeyEvent*>(event));
     } else if (event->type() == QEvent::MouseButtonDblClick) {
         if (static_cast<QMouseEvent*>(event)->modifiers() == Qt::NoModifier) {
-            toggleFullScreenRequested();
+            emit toggleFullScreenRequested();
         }
     }
     return false;
diff --git a/lib/eventwatcher.cpp b/lib/eventwatcher.cpp
--- a/lib/eventwatcher.cpp
+++ b/lib/eventwatcher.cpp
@@ -47,7 +47,7 @@
 bool EventWatcher::eventFilter(QObject*, QEvent* event)
 {
     if (mEventTypes.contains(event->type())) {
-        eventTriggered(event);
+        emit eventTriggered(event);
     }
     return false;
 }
diff --git a/lib/hud/hudbutton.cpp b/lib/hud/hudbutton.cpp
--- a/lib/hud/hudbutton.cpp
+++ b/lib/hud/hudbutton.cpp
@@ -187,7 +187,7 @@
     d->mIsDown = false;
     update();
     if (boundingRect().contains(event->pos())) {
-        clicked();
+        emit clicked();
     }
 }
 
diff --git a/lib/hud/hudslider.cpp b/lib/hud/hudslider.cpp
--- a/lib/hud/hudslider.cpp
+++ b/lib/hud/hudslider.cpp
@@ -297,7 +297,7 @@
         d->mValue = value;
         setSliderPosition(value);
         update();
-        valueChanged(d->mValue);
+        emit valueChanged(d->mValue);
     }
 }
 
@@ -346,7 +346,7 @@
     case QAbstractSlider::SliderNoAction:
         break;
     };
-    actionTriggered(action);
+    emit actionTriggered(action);
     setValue(d->mSliderPosition);
 }
 
diff --git a/lib/hud/hudwidget.cpp b/lib/hud/hudwidget.cpp
--- a/lib/hud/hudwidget.cpp
+++ b/lib/hud/hudwidget.cpp
@@ -115,7 +115,7 @@
 void HudWidget::slotCloseButtonClicked()
 {
     close();
-    closed();
+    emit closed();
 }
 
 void HudWidget::paint(QPainter* painter, const QStyleOptionGraphicsItem*, QWidget*)
@@ -140,9 +140,9 @@
 void HudWidget::slotFadeAnimationFinished()
 {
     if (qFuzzyCompare(opacity(), 1)) {
-        fadedIn();
+        emit fadedIn();
     } else {
-        fadedOut();
+        emit fadedOut();
         if (d->mAutoDeleteOnFadeout) {
             deleteLater();
         }
diff --git a/lib/imagescaler.cpp b/lib/imagescaler.cpp
--- a/lib/imagescaler.cpp
+++ b/lib/imagescaler.cpp
@@ -129,7 +129,7 @@
     const qreal REAL_DELTA = 0.001;
     if (qAbs(d->mZoom - 1.0) < REAL_DELTA) {
         QImage tmp = d->mDocument->image().copy(rect);
-        scaledRect(rect.left(), rect.top(), tmp);
+        emit scaledRect(rect.left(), rect.top(), tmp);
         return;
     }
 
diff --git a/lib/redeyereduction/redeyereductiontool.cpp b/lib/redeyereduction/redeyereductiontool.cpp
--- a/lib/redeyereduction/redeyereductiontool.cpp
+++ b/lib/redeyereduction/redeyereductiontool.cpp
@@ -177,7 +177,7 @@
         return;
     }
     event->accept();
-    d->mToolWidget->mainDialogButtonBox->accepted();
+    emit d->mToolWidget->mainDialogButtonBox->accepted();
 }
 
 void RedEyeReductionTool::keyPressEvent(QKeyEvent* event)
@@ -192,16 +192,16 @@
     switch (event->key()) {
     case Qt::Key_Escape:
         event->accept();
-        buttons->rejected();
+        emit buttons->rejected();
         break;
     case Qt::Key_Return:
     case Qt::Key_Enter: {
         event->accept();
         auto focusButton = static_cast<QPushButton*>(buttons->focusWidget());
         if (focusButton && buttons->buttonRole(focusButton) == QDialogButtonBox::RejectRole) {
-            buttons->rejected();
+            emit buttons->rejected();
         } else {
-            buttons->accepted();
+            emit buttons->accepted();
         }
         break;
     }
diff --git a/lib/slidecontainer.cpp b/lib/slidecontainer.cpp
--- a/lib/slidecontainer.cpp
+++ b/lib/slidecontainer.cpp
@@ -158,9 +158,9 @@
 {
     if (height() == 0) {
         mSlidingOut = false;
-        slidedOut();
+        emit slidedOut();
     } else {
-        slidedIn();
+        emit slidedIn();
     }
 }
 
diff --git a/lib/slideshow.cpp b/lib/slideshow.cpp
--- a/lib/slideshow.cpp
+++ b/lib/slideshow.cpp
@@ -231,7 +231,7 @@
     d->updateTimerInterval();
     d->mTimer->setSingleShot(false);
     d->doStart();
-    stateChanged(true);
+    emit stateChanged(true);
 }
 
 void SlideShow::setInterval(int intervalInSeconds)
@@ -269,7 +269,7 @@
     LOG("Stopping timer");
     d->mTimer->stop();
     d->mState = Paused;
-    stateChanged(false);
+    emit stateChanged(false);
 }
 
 void SlideShow::resumeAndGoToNextUrl()
@@ -289,7 +289,7 @@
         pause();
         return;
     }
-    goToUrl(url);
+    emit goToUrl(url);
 }
 
 void SlideShow::setCurrentUrl(const QUrl &url)
diff --git a/lib/thumbnailprovider/thumbnailgenerator.cpp b/lib/thumbnailprovider/thumbnailgenerator.cpp
--- a/lib/thumbnailprovider/thumbnailgenerator.cpp
+++ b/lib/thumbnailprovider/thumbnailgenerator.cpp
@@ -292,7 +292,7 @@
             QSize size(mOriginalWidth, mOriginalHeight);
             LOG("emitting done signal, size=" << size);
             QMutexLocker lock(&mMutex);
-            done(mImage, size);
+            emit done(mImage, size);
             LOG("Done");
         }
     }
diff --git a/lib/thumbnailprovider/thumbnailprovider.cpp b/lib/thumbnailprovider/thumbnailprovider.cpp
--- a/lib/thumbnailprovider/thumbnailprovider.cpp
+++ b/lib/thumbnailprovider/thumbnailprovider.cpp
@@ -296,7 +296,7 @@
     if (mItems.isEmpty()) {
         LOG("No more items. Nothing to do");
         mCurrentItem = KFileItem();
-        finished();
+        emit finished();
         return;
     }
 
diff --git a/lib/thumbnailview/previewitemdelegate.cpp b/lib/thumbnailview/previewitemdelegate.cpp
--- a/lib/thumbnailview/previewitemdelegate.cpp
+++ b/lib/thumbnailview/previewitemdelegate.cpp
@@ -864,24 +864,24 @@
 
 void PreviewItemDelegate::slotSaveClicked()
 {
-    saveDocumentRequested(urlForIndex(d->mIndexUnderCursor));
+    emit saveDocumentRequested(urlForIndex(d->mIndexUnderCursor));
 }
 
 void PreviewItemDelegate::slotRotateLeftClicked()
 {
     d->selectIndexUnderCursorIfNoMultiSelection();
-    rotateDocumentLeftRequested(urlForIndex(d->mIndexUnderCursor));
+    emit rotateDocumentLeftRequested(urlForIndex(d->mIndexUnderCursor));
 }
 
 void PreviewItemDelegate::slotRotateRightClicked()
 {
     d->selectIndexUnderCursorIfNoMultiSelection();
-    rotateDocumentRightRequested(urlForIndex(d->mIndexUnderCursor));
+    emit rotateDocumentRightRequested(urlForIndex(d->mIndexUnderCursor));
 }
 
 void PreviewItemDelegate::slotFullScreenClicked()
 {
-    showDocumentInFullScreenRequested(urlForIndex(d->mIndexUnderCursor));
+    emit showDocumentInFullScreenRequested(urlForIndex(d->mIndexUnderCursor));
 }
 
 void PreviewItemDelegate::slotToggleSelectionClicked()
diff --git a/lib/thumbnailview/thumbnailview.cpp b/lib/thumbnailview/thumbnailview.cpp
--- a/lib/thumbnailview/thumbnailview.cpp
+++ b/lib/thumbnailview/thumbnailview.cpp
@@ -390,8 +390,8 @@
         it.value().mAdjustedPix = QPixmap();
     }
 
-    thumbnailSizeChanged(value);
-    thumbnailWidthChanged(value.width());
+    emit thumbnailSizeChanged(value);
+    emit thumbnailWidthChanged(value.width());
     if (d->mScaleMode != ScaleToFit) {
         scheduleDelayedItemsLayout();
     }
@@ -490,7 +490,7 @@
 {
     QListView::rowsInserted(parent, start, end);
     d->mScheduledThumbnailGenerationTimer.start();
-    rowsInsertedSignal(parent, start, end);
+    emit rowsInsertedSignal(parent, start, end);
 }
 
 void ThumbnailView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight, const QVector<int> &roles)