1 files changed, 79 insertions, 0 deletions
diff --git a/basicsuite/ebike-ui/datamodelplugin/fpscounter.cpp b/basicsuite/ebike-ui/datamodelplugin/fpscounter.cpp
new file mode 100644
index 0000000..137dcb4
--- /dev/null
+++ b/basicsuite/ebike-ui/datamodelplugin/fpscounter.cpp
@@ -0,0 +1,79 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the E-Bike demo project.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QQuickWindow>
+
+#include "fpscounter.h"
+
+FpsCounter::FpsCounter(QObject *parent)
+    : QObject(parent)
+    , m_frameCounter(0)
+    , m_fps(0.0)
+    , m_visible(false)
+{
+}
+
+void FpsCounter::setVisible(bool visible)
+{
+    if (m_visible == visible)
+        return;
+
+    m_visible = visible;
+    emit visibleChanged(m_visible);
+}
+
+void FpsCounter::setWindow(QQuickWindow *window)
+{
+    connect(window, &QQuickWindow::frameSwapped, this, &FpsCounter::frameUpdated);
+    startTimer(1000);
+    m_timer.start();
+}
+
+void FpsCounter::timerEvent(QTimerEvent *)
+{
+    // Calculate new FPS
+    qreal newfps = qRound(m_frameCounter * 1000.0 / m_timer.elapsed());
+    m_frameCounter = 0;
+    m_timer.start();
+
+    // If there is no change, do nothing
+    if (qFuzzyCompare(m_fps, newfps))
+        return;
+
+    // Otherwise emit new fps
+    m_fps = newfps;
+    emit fpsChanged(m_fps);
+}