##// END OF EJS Templates
Added a new QXYSeries::replace override for performance reasons....
Added a new QXYSeries::replace override for performance reasons. Also added a QML demo application for oscilloscope use case. Oscilloscope use case was selected, because it involves a lot of data and has a strict requirements for performance. It revealed performance issues in data handling in QXYSeries, painting of QLineSeries and updating data in a model.

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charts.h
86 lines | 1.9 KiB | text/x-c | CLexer
/****************************************************************************
**
** Copyright (C) 2012 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 Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial 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
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef CHARTS_H
#define CHARTS_H
#include "model.h"
#include <QList>
#include <QString>
#include <qchartglobal.h>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
class QChart;
QTCOMMERCIALCHART_END_NAMESPACE
QTCOMMERCIALCHART_USE_NAMESPACE
class Chart
{
public:
Chart();
virtual ~Chart();
virtual void initialize();
virtual QChart* createChart(const DataTable& table) = 0;
virtual QString name() = 0;
virtual QString category() = 0;
virtual QString subCategory() = 0;
};
namespace Charts
{
typedef QList<Chart*> ChartList;
inline ChartList& chartList()
{
static ChartList list;
return list;
}
inline bool findChart(Chart* chart)
{
ChartList& list = chartList();
if (list.contains(chart)) {
return true;
}
foreach (Chart* item, list) {
if (item->name() == chart->name() && item->category() == chart->category() && item->subCategory() == chart->subCategory()) {
return true;
}
}
return false;
}
inline void addChart(Chart* chart)
{
ChartList& list = chartList();
if (!findChart(chart)) {
list.append(chart);
}
}
}
#define DECLARE_CHART(chartName) static chartName t;
#endif