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-rw-r--r--examples/datavisualization/audiolevels/audiolevelsiodevice.cpp114
1 files changed, 0 insertions, 114 deletions
diff --git a/examples/datavisualization/audiolevels/audiolevelsiodevice.cpp b/examples/datavisualization/audiolevels/audiolevelsiodevice.cpp
deleted file mode 100644
index 7cd2bbb3..00000000
--- a/examples/datavisualization/audiolevels/audiolevelsiodevice.cpp
+++ /dev/null
@@ -1,114 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the Qt Data Visualization module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:GPL$
-** 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 https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3 or (at your option) any later version
-** approved by the KDE Free Qt Foundation. The licenses are as published by
-** the Free Software Foundation and appearing in the file LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "audiolevelsiodevice.h"
-#include <QtCore/QDebug>
-
-using namespace QtDataVisualization;
-
-//! [1]
-static const int resolution = 8;
-static const int rowSize = 800;
-static const int rowCount = 7; // Must be odd number
-static const int middleRow = rowCount / 2;
-//! [1]
-
-AudioLevelsIODevice::AudioLevelsIODevice(QBarDataProxy *proxy, QObject *parent)
- : QIODevice(parent),
- m_proxy(proxy),
- m_array(new QBarDataArray)
-{
- // We reuse the existing array for maximum performance, so construct the array here
- //! [0]
- m_array->reserve(rowCount);
- for (int i = 0; i < rowCount; i++)
- m_array->append(new QBarDataRow(rowSize));
- //! [0]
-
- qDebug() << "Total of" << (rowSize * rowCount) << "items in the array.";
-}
-
-// Implementation required for this pure virtual function
-qint64 AudioLevelsIODevice::readData(char *data, qint64 maxSize)
-{
- Q_UNUSED(data);
- Q_UNUSED(maxSize);
- return -1;
-}
-
-//! [2]
-qint64 AudioLevelsIODevice::writeData(const char *data, qint64 maxSize)
-{
- // The amount of new data available.
- int newDataSize = maxSize / resolution;
-
- // If we get more data than array size, we need to adjust the start index for new data.
- int newDataStartIndex = qMax(0, (newDataSize - rowSize));
-
- // Move the old data ahead in the rows (only do first half of rows + middle one now).
- // If the amount of new data was larger than row size, skip copying.
- if (!newDataStartIndex) {
- for (int i = 0; i <= middleRow; i++) {
- QBarDataItem *srcPos = m_array->at(i)->data();
- QBarDataItem *dstPos = srcPos + newDataSize;
- memmove((void *)dstPos, (void *)srcPos, (rowSize - newDataSize) * sizeof(QBarDataItem));
- }
- }
-
- // Insert data in reverse order, so that newest data is always at the front of the row.
- int index = 0;
- for (int i = newDataSize - 1; i >= newDataStartIndex; i--) {
- // Add 0.01 to the value to avoid gaps in the graph (i.e. zero height bars).
- // Also, scale to 0...100
- float value = float(quint8(data[resolution * i]) - 128) / 1.28f + 0.01f;
- (*m_array->at(middleRow))[index].setValue(value);
- // Insert a fractional value into front half of the rows.
- for (int j = 1; j <= middleRow; j++) {
- float fractionalValue = value / float(j + 1);
- (*m_array->at(middleRow - j))[index].setValue(fractionalValue);
- }
- index++;
- }
-
- // Copy the front half of rows to the back half for symmetry.
- index = 0;
- for (int i = rowCount - 1; i > middleRow; i--) {
- QBarDataItem *srcPos = m_array->at(index++)->data();
- QBarDataItem *dstPos = m_array->at(i)->data();
- memcpy((void *)dstPos, (void *)srcPos, rowSize * sizeof(QBarDataItem));
- }
-
- // Reset the proxy array now that data has been updated to trigger a redraw.
- m_proxy->resetArray(m_array);
-
- return maxSize;
-}
-//! [2]
-
-