diff --git a/app/browsemainpage.cpp b/app/browsemainpage.cpp
--- a/app/browsemainpage.cpp
+++ b/app/browsemainpage.cpp
@@ -76,7 +76,6 @@
     KSelectAction* mSortAction;
     QActionGroup* mThumbnailDetailsActionGroup;
     PreviewItemDelegate* mDelegate;
-    bool mFullScreenMode;
 
     void setupWidgets()
     {
@@ -227,7 +226,6 @@
     d->mDirModel = gvCore->sortedDirModel();
     d->mDocumentCount = 0;
     d->mActionCollection = actionCollection;
-    d->mFullScreenMode = false;
     d->setupWidgets();
     d->setupActions(actionCollection);
     d->setupFilterController();
@@ -278,7 +276,7 @@
 
 bool BrowseMainPage::eventFilter(QObject* watched, QEvent* event)
 {
-    if (d->mFullScreenMode && event->type() == QEvent::ShortcutOverride) {
+    if (window()->isFullScreen() && event->type() == QEvent::ShortcutOverride) {
         const QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);
         if (keyEvent->key() == Qt::Key_Escape) {
            d->mActionCollection->action("leave_fullscreen")->trigger();
@@ -370,7 +368,6 @@
 
 void BrowseMainPage::setFullScreenMode(bool fullScreen)
 {
-    d->mFullScreenMode = fullScreen;
     setPalette(d->mGvCore->palette(fullScreen ? GvCore::FullScreenPalette : GvCore::NormalPalette));
     d->mThumbnailView->setPalette(d->mGvCore->palette(fullScreen ? GvCore::FullScreenViewPalette : GvCore::NormalViewPalette));
     d->updateUrlNavigatorBackgroundColor();
diff --git a/app/fullscreencontent.h b/app/fullscreencontent.h
--- a/app/fullscreencontent.h
+++ b/app/fullscreencontent.h
@@ -111,7 +111,6 @@
     QPointer<FullScreenConfigWidget> mConfigWidget;
     QAction * mOptionsAction;
 
-    bool mFullScreenMode;
     bool mViewPageVisible;
 
     void createOptionsAction();
diff --git a/app/fullscreencontent.cpp b/app/fullscreencontent.cpp
--- a/app/fullscreencontent.cpp
+++ b/app/fullscreencontent.cpp
@@ -102,7 +102,6 @@
 FullScreenContent::FullScreenContent(QObject* parent)
 : QObject(parent)
 {
-    mFullScreenMode = false;
     mViewPageVisible = false;
 }
 
@@ -341,7 +340,7 @@
 
 void FullScreenContent::updateContainerAppearance()
 {
-    if (!mFullScreenMode || !mViewPageVisible) {
+    if (!mContent->window()->isFullScreen() || !mViewPageVisible) {
         mAutoHideContainer->setActivated(false);
         return;
     }
@@ -353,7 +352,7 @@
 
 void FullScreenContent::adjustSize()
 {
-    if (mFullScreenMode && mViewPageVisible) {
+    if (mContent->window()->isFullScreen() && mViewPageVisible) {
         mAutoHideContainer->adjustSize();
     }
 }
@@ -460,7 +459,7 @@
 
 void FullScreenContent::setFullScreenMode(bool fullScreenMode)
 {
-    mFullScreenMode = fullScreenMode;
+    Q_UNUSED(fullScreenMode);
     updateContainerAppearance();
 }
 
diff --git a/app/mainwindow.cpp b/app/mainwindow.cpp
--- a/app/mainwindow.cpp
+++ b/app/mainwindow.cpp
@@ -695,7 +695,7 @@
             name = BROWSE_MODE_SIDE_BAR_GROUP;
             break;
         case ViewMainPageId:
-            name = mViewMainPage->isFullScreenMode()
+            name = q->isFullScreen()
                    ? FULLSCREEN_MODE_SIDE_BAR_GROUP
                    : VIEW_MODE_SIDE_BAR_GROUP;
             break;
@@ -1275,42 +1275,33 @@
         qApp->setProperty("KDE_COLOR_SCHEME_PATH", d->mGvCore->fullScreenPaletteName());
         QApplication::setPalette(d->mGvCore->palette(GvCore::FullScreenPalette));
 
-        d->mFullScreenContent->setFullScreenMode(true);
-        d->mBrowseMainPage->setFullScreenMode(true);
-        d->mViewMainPage->setFullScreenMode(true);
-        d->mSaveBar->setFullScreenMode(true);
         d->setScreenSaverEnabled(false);
-
-        // HACK: Only load sidebar config now, because it looks at
-        // ViewMainPage fullScreenMode property to determine the sidebar
-        // config group.
-        d->loadSideBarConfig();
     } else {
         setAutoSaveSettings();
 
         // Back to normal
         qApp->setProperty("KDE_COLOR_SCHEME_PATH", QVariant());
         QApplication::setPalette(d->mGvCore->palette(GvCore::NormalPalette));
 
-        d->mFullScreenContent->setFullScreenMode(false);
-        d->mBrowseMainPage->setFullScreenMode(false);
-        d->mViewMainPage->setFullScreenMode(false);
         d->mSlideShow->stop();
-        d->mSaveBar->setFullScreenMode(false);
         KToggleFullScreenAction::setFullScreen(this, false);
         menuBar()->setVisible(d->mShowMenuBarAction->isChecked());
         toggleStatusBar();
         toolBar()->setVisible(d->mStateBeforeFullScreen.mToolBarVisible);
 
         d->setScreenSaverEnabled(true);
 
-        // Keep this after mViewMainPage->setFullScreenMode(false).
-        // See call to loadSideBarConfig() above.
-        d->loadSideBarConfig();
-
         // See resizeEvent
         d->mFullScreenLeftAt = QDateTime::currentDateTime();
     }
+
+    d->mFullScreenContent->setFullScreenMode(checked);
+    d->mBrowseMainPage->setFullScreenMode(checked);
+    d->mViewMainPage->setFullScreenMode(checked);
+    d->mSaveBar->setFullScreenMode(checked);
+
+    d->loadSideBarConfig();
+
     setUpdatesEnabled(true);
     d->autoAssignThumbnailProvider();
 }
diff --git a/app/savebar.cpp b/app/savebar.cpp
--- a/app/savebar.cpp
+++ b/app/savebar.cpp
@@ -69,7 +69,6 @@
     QLabel* mActionsLabel;
     QFrame* mTooManyChangesFrame;
     QUrl mCurrentUrl;
-    bool mFullScreenMode;
 
     void createTooManyChangesFrame()
     {
@@ -215,7 +214,7 @@
     void updateWidgetSizes()
     {
         QVBoxLayout* layout = static_cast<QVBoxLayout*>(mSaveBarWidget->layout());
-        int topRowHeight = mFullScreenMode ? 0 : mTopRowWidget->height();
+        int topRowHeight = q->window()->isFullScreen() ? 0 : mTopRowWidget->height();
         int bottomRowHeight = mTooManyChangesFrame->isVisibleTo(mSaveBarWidget) ? mTooManyChangesFrame->sizeHint().height() : 0;
 
         int height = 2 * layout->margin() + topRowHeight + bottomRowHeight;
@@ -231,7 +230,6 @@
 , d(new SaveBarPrivate)
 {
     d->q = this;
-    d->mFullScreenMode = false;
     d->mActionCollection = actionCollection;
     d->mSaveBarWidget = new QWidget();
     d->mSaveBarWidget->setObjectName(QLatin1String("saveBarWidget"));
@@ -310,11 +308,10 @@
     d->updateWidgetSizes();
 }
 
-void SaveBar::setFullScreenMode(bool value)
+void SaveBar::setFullScreenMode(bool isFullScreen)
 {
-    d->mFullScreenMode = value;
-    d->mSaveAllFullScreenButton->setVisible(value);
-    if (value) {
+    d->mSaveAllFullScreenButton->setVisible(isFullScreen);
+    if (isFullScreen) {
         d->applyFullScreenStyleSheet();
     } else {
         d->applyNormalStyleSheet();
@@ -326,7 +323,7 @@
 {
     QList<QUrl> lst = DocumentFactory::instance()->modifiedDocumentList();
 
-    if (d->mFullScreenMode) {
+    if (window()->isFullScreen()) {
         d->mTopRowWidget->hide();
     } else {
         d->mTopRowWidget->show();
@@ -336,7 +333,7 @@
     d->updateTooManyChangesFrame(lst);
 
     d->updateWidgetSizes();
-    if (lst.isEmpty() || (d->mFullScreenMode && !d->mTooManyChangesFrame->isVisibleTo(d->mSaveBarWidget))) {
+    if (lst.isEmpty() || (window()->isFullScreen() && !d->mTooManyChangesFrame->isVisibleTo(d->mSaveBarWidget))) {
         slideOut();
     } else {
         slideIn();
diff --git a/app/viewmainpage.h b/app/viewmainpage.h
--- a/app/viewmainpage.h
+++ b/app/viewmainpage.h
@@ -70,8 +70,6 @@
 
     void setFullScreenMode(bool fullScreen);
 
-    bool isFullScreenMode() const;
-
     int statusBarHeight() const;
 
     QSize sizeHint() const Q_DECL_OVERRIDE;
diff --git a/app/viewmainpage.cpp b/app/viewmainpage.cpp
--- a/app/viewmainpage.cpp
+++ b/app/viewmainpage.cpp
@@ -160,7 +160,6 @@
     // that use this KPart
     QHash<DocumentView*, KActivities::ResourceInstance*> mActivityResources;
 
-    bool mFullScreenMode;
     bool mCompareMode;
     bool mThumbnailBarVisibleBeforeFullScreen;
     ZoomMode::Enum mZoomMode;
@@ -400,7 +399,6 @@
     d->mSlideShow = slideShow;
     d->mActionCollection = actionCollection;
     d->mGvCore = gvCore;
-    d->mFullScreenMode = false;
     d->mCompareMode = false;
     d->mThumbnailBarVisibleBeforeFullScreen = false;
 
@@ -507,7 +505,6 @@
 
 void ViewMainPage::setFullScreenMode(bool fullScreenMode)
 {
-    d->mFullScreenMode = fullScreenMode;
     d->mStatusBarContainer->setVisible(!fullScreenMode);
 
     if (fullScreenMode) {
@@ -524,11 +521,6 @@
     d->mToggleThumbnailBarAction->setEnabled(!fullScreenMode);
 }
 
-bool ViewMainPage::isFullScreenMode() const
-{
-    return d->mFullScreenMode;
-}
-
 ThumbnailBarView* ViewMainPage::thumbnailBar() const
 {
     return d->mThumbnailBar;