diff --git a/src/kdefrontend/worksheet/SlidingPanel.cpp b/src/kdefrontend/worksheet/SlidingPanel.cpp
index b7238727a..64f286627 100644
--- a/src/kdefrontend/worksheet/SlidingPanel.cpp
+++ b/src/kdefrontend/worksheet/SlidingPanel.cpp
@@ -1,93 +1,93 @@
 /***************************************************************************
 File                 : SlidingPanel.cpp
 Project              : LabPlot
 Description          : Sliding panel shown in the presenter widget
 --------------------------------------------------------------------
 Copyright            : (C) 2016 by Fabian Kristof (fkristofszabolcs@gmail.com)
 ***************************************************************************/
 
 /***************************************************************************
 *                                                                         *
 *  This program is free software; you can redistribute it and/or modify   *
 *  it under the terms of the GNU General Public License as published by   *
 *  the Free Software Foundation; either version 2 of the License, or      *
 *  (at your option) any later version.                                    *
 *                                                                         *
 *  This program is distributed in the hope that it will be useful,        *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
 *  GNU General Public License for more details.                           *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor,                    *
 *   Boston, MA  02110-1301  USA                                           *
 *                                                                         *
 ***************************************************************************/
 #include "SlidingPanel.h"
 
+#include <QApplication>
+#include <QHBoxLayout>
 #include <QLabel>
 #include <QPushButton>
-#include <QDesktopWidget>
-#include <QHBoxLayout>
-#include <QApplication>
+#include <QScreen>
+#include <QSize>
+
 #include <KLocalizedString>
 
 SlidingPanel::SlidingPanel(QWidget *parent, const QString &worksheetName) : QFrame(parent) {
 	setAttribute(Qt::WA_DeleteOnClose);
 
 	m_worksheetName = new QLabel(worksheetName);
 	QFont nameFont;
 	nameFont.setPointSize(20);
 	nameFont.setBold(true);
 	m_worksheetName->setFont(nameFont);
 
 	m_quitPresentingMode = new QPushButton(i18n("Quit Presentation"));
 	m_quitPresentingMode->setIcon(QIcon::fromTheme(QLatin1String("window-close")));
 
 	auto* hlayout = new QHBoxLayout;
 	hlayout->addWidget(m_worksheetName);
 	auto* spacer = new QSpacerItem(10, 10, QSizePolicy::Expanding, QSizePolicy::Minimum);
 	hlayout->addItem(spacer);
 	hlayout->addWidget(m_quitPresentingMode);
 	setLayout(hlayout);
 
 	QPalette pal(palette());
 	pal.setColor(QPalette::Background, Qt::gray);
 	setAutoFillBackground(true);
 	setPalette(pal);
 
 	move(0, 0);
 	raise();
 	show();
 }
 
 SlidingPanel::~SlidingPanel() {
 	delete m_worksheetName;
 	delete m_quitPresentingMode;
 }
 
 void SlidingPanel::movePanel(qreal value) {
 	move(0, -height() + static_cast<int>(value * height()) );
 	raise();
 }
 
 QPushButton* SlidingPanel::quitButton() const {
 	return m_quitPresentingMode;
 }
 
 QSize SlidingPanel::sizeHint() const {
 	QSize sh;
-	QDesktopWidget* const dw = QApplication::desktop();
-	const int primaryScreenIdx = dw->primaryScreen();
-	const QRect& screenSize = dw->availableGeometry(primaryScreenIdx);
+	const QRect& screenSize = QGuiApplication::primaryScreen()->availableGeometry();
 	sh.setWidth(screenSize.width());
 
 	//for the height use 1.5 times the height of the font used in the label (20 points) in pixels
 	QFont font;
 	font.setPointSize(20);
 	const QFontMetrics fm(font);
 	sh.setHeight(1.5*fm.ascent());
 
 	return sh;
 }