1 files changed, 57 insertions, 0 deletions
diff --git a/examples/charts/audio/xyseriesiodevice.cpp b/examples/charts/audio/xyseriesiodevice.cpp
new file mode 100644
index 00000000..5440771f
--- /dev/null
+++ b/examples/charts/audio/xyseriesiodevice.cpp
@@ -0,0 +1,57 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Enterprise Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "xyseriesiodevice.h"
+#include <QXYSeries>
+
+XYSeriesIODevice::XYSeriesIODevice(QXYSeries * series, QObject *parent) :
+    QIODevice(parent),
+    m_series(series)
+{
+}
+
+qint64 XYSeriesIODevice::readData(char * data, qint64 maxSize)
+{
+    Q_UNUSED(data)
+    Q_UNUSED(maxSize)
+    return -1;
+}
+
+qint64 XYSeriesIODevice::writeData(const char * data, qint64 maxSize)
+{
+    qint64 range = 2000;
+    QList<QPointF> oldPoints = m_series->points();
+    QList<QPointF> points;
+    int resolution = 4;
+
+    if (oldPoints.count() < range) {
+        points = m_series->points();
+    } else {
+        for (int i = maxSize/resolution; i < oldPoints.count(); i++)
+            points.append(QPointF(i - maxSize/resolution, oldPoints.at(i).y()));
+    }
+
+    qint64 size = points.count();
+    for (int k = 0; k < maxSize/resolution; k++)
+        points.append(QPointF(k + size, ((quint8)data[resolution * k] - 128)/128.0));
+
+    m_series->replace(points);
+    return maxSize;
+}