datasource.cpp
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| text/x-c
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CppLexer
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r2488 | /**************************************************************************** | ||
| ** | ||||
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r2776 | ** Copyright (C) 2015 The Qt Company Ltd | ||
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r2488 | ** All rights reserved. | ||
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r2776 | ** For any questions to The Qt Company, please use contact form at http://qt.io | ||
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r2488 | ** | ||
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r2740 | ** This file is part of the Qt Charts module. | ||
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r2488 | ** | ||
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r2740 | ** Licensees holding valid commercial license for Qt may use this file in | ||
| ** accordance with the Qt License Agreement provided with the Software | ||||
| ** or, alternatively, in accordance with the terms contained in a written | ||||
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r2776 | ** agreement between you and The Qt Company. | ||
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r2488 | ** | ||
| ** If you have questions regarding the use of this file, please use | ||||
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r2740 | ** contact form at http://qt.io | ||
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r2488 | ** | ||
| ****************************************************************************/ | ||||
| #include "datasource.h" | ||||
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r2714 | #include <QtCharts/QXYSeries> | ||
| #include <QtCharts/QAreaSeries> | ||||
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r2488 | #include <QtQuick/QQuickView> | ||
| #include <QtQuick/QQuickItem> | ||||
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r2714 | #include <QtCore/QDebug> | ||
| #include <QtCore/QtMath> | ||||
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r2488 | |||
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r2712 | QT_CHARTS_USE_NAMESPACE | ||
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r2488 | |||
| Q_DECLARE_METATYPE(QAbstractSeries *) | ||||
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r2694 | Q_DECLARE_METATYPE(QAbstractAxis *) | ||
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r2488 | |||
| DataSource::DataSource(QQuickView *appViewer, QObject *parent) : | ||||
| QObject(parent), | ||||
| m_appViewer(appViewer), | ||||
| m_index(-1) | ||||
| { | ||||
| qRegisterMetaType<QAbstractSeries*>(); | ||||
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r2694 | qRegisterMetaType<QAbstractAxis*>(); | ||
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r2488 | |||
| generateData(0, 5, 1024); | ||||
| } | ||||
| void DataSource::update(QAbstractSeries *series) | ||||
| { | ||||
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Heikkinen Miikka
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r2526 | if (series) { | ||
| QXYSeries *xySeries = static_cast<QXYSeries *>(series); | ||||
| m_index++; | ||||
| if (m_index > m_data.count() - 1) | ||||
| m_index = 0; | ||||
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r2488 | |||
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r2798 | QVector<QPointF> points = m_data.at(m_index); | ||
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r2526 | // Use replace instead of clear + append, it's optimized for performance | ||
| xySeries->replace(points); | ||||
| } | ||||
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r2488 | } | ||
| void DataSource::generateData(int type, int rowCount, int colCount) | ||||
| { | ||||
| // Remove previous data | ||||
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r2798 | foreach (QVector<QPointF> row, m_data) | ||
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r2488 | row.clear(); | ||
| m_data.clear(); | ||||
| // Append the new data depending on the type | ||||
| for (int i(0); i < rowCount; i++) { | ||||
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r2798 | QVector<QPointF> points; | ||
| points.reserve(colCount); | ||||
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r2488 | for (int j(0); j < colCount; j++) { | ||
| qreal x(0); | ||||
| qreal y(0); | ||||
| switch (type) { | ||||
| case 0: | ||||
| // data with sin + random component | ||||
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r2613 | y = qSin(3.14159265358979 / 50 * j) + 0.5 + (qreal) rand() / (qreal) RAND_MAX; | ||
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r2488 | x = j; | ||
| break; | ||||
| case 1: | ||||
| // linear data | ||||
| x = j; | ||||
| y = (qreal) i / 10; | ||||
| break; | ||||
| default: | ||||
| // unknown, do nothing | ||||
| break; | ||||
| } | ||||
| points.append(QPointF(x, y)); | ||||
| } | ||||
| m_data.append(points); | ||||
| } | ||||
| } | ||||