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1 | 1 | /**************************************************************************** |
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2 | 2 | ** |
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3 | 3 | ** Copyright (C) 2012 Digia Plc |
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4 | 4 | ** All rights reserved. |
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5 | 5 | ** For any questions to Digia, please use contact form at http://qt.digia.com |
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6 | 6 | ** |
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7 | 7 | ** This file is part of the Qt Commercial Charts Add-on. |
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8 | 8 | ** |
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9 | 9 | ** $QT_BEGIN_LICENSE$ |
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10 | 10 | ** Licensees holding valid Qt Commercial licenses may use this file in |
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11 | 11 | ** accordance with the Qt Commercial License Agreement provided with the |
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12 | 12 | ** Software or, alternatively, in accordance with the terms contained in |
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13 | 13 | ** a written agreement between you and Digia. |
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14 | 14 | ** |
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15 | 15 | ** If you have questions regarding the use of this file, please use |
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16 | 16 | ** contact form at http://qt.digia.com |
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17 | 17 | ** $QT_END_LICENSE$ |
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18 | 18 | ** |
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19 | 19 | ****************************************************************************/ |
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20 | 20 | |
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21 | 21 | #include "datasource.h" |
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22 | 22 | #include <QXYSeries> |
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23 | 23 | #include <QAreaSeries> |
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24 | 24 | #include <QDeclarativeView> |
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25 | 25 | #include <QGLWidget> |
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26 | 26 | #include <QDebug> |
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27 | 27 | #include <cmath> |
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28 | 28 | |
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29 | 29 | QTCOMMERCIALCHART_USE_NAMESPACE |
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30 | 30 | |
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31 | Q_DECLARE_METATYPE(QAbstractSeries *) | |
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32 | ||
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31 | 33 | DataSource::DataSource(QDeclarativeView *appViewer, QObject *parent) : |
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32 | 34 | QObject(parent), |
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33 | 35 | m_appViewer(appViewer), |
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34 | 36 | m_index(-1) |
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35 | 37 | { |
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36 | // generate | |
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38 | qRegisterMetaType<QAbstractSeries*>(); | |
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39 | ||
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37 | 40 | generateData(0, 5, 1024); |
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38 | 41 | } |
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39 | 42 | |
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40 | 43 | void DataSource::update(QAbstractSeries *series) |
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41 | 44 | { |
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42 | 45 | QXYSeries *xySeries = qobject_cast<QXYSeries *>(series); |
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43 | 46 | Q_ASSERT(xySeries); |
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44 | 47 | |
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45 | 48 | m_index++; |
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46 | 49 | if (m_index > m_data.count() - 1) |
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47 | 50 | m_index = 0; |
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48 | 51 | |
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49 | 52 | QList<QPointF> points = m_data.at(m_index); |
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50 | 53 | // Use replace instead of clear + append, it's optimized for performance |
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51 | 54 | xySeries->replace(points); |
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52 | 55 | } |
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53 | 56 | |
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54 | 57 | void DataSource::generateData(int type, int rowCount, int colCount) |
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55 | 58 | { |
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56 | 59 | // Remove previous data |
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57 | 60 | foreach (QList<QPointF> row, m_data) |
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58 | 61 | row.clear(); |
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59 | 62 | m_data.clear(); |
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60 | 63 | |
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61 | 64 | // Append the new data depending on the type |
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62 | 65 | for (int i(0); i < rowCount; i++) { |
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63 | 66 | QList<QPointF> points; |
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64 | 67 | for (int j(0); j < colCount; j++) { |
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65 | 68 | qreal x(0); |
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66 | 69 | qreal y(0); |
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67 | 70 | switch (type) { |
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68 | 71 | case 0: |
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69 | 72 | // data with sin + random component |
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70 | 73 | y = sin(3.14159265358979 / 50 * j) + 0.5 + (qreal) rand() / (qreal) RAND_MAX; |
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71 | 74 | x = j; |
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72 | 75 | break; |
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73 | 76 | case 1: |
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74 | 77 | // linear data |
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75 | 78 | x = j; |
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76 | 79 | y = (qreal) i / 10; |
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77 | 80 | break; |
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78 | 81 | default: |
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79 | 82 | // unknown, do nothing |
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80 | 83 | break; |
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81 | 84 | } |
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82 | 85 | points.append(QPointF(x, y)); |
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83 | 86 | } |
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84 | 87 | m_data.append(points); |
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85 | 88 | } |
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86 | 89 | } |
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87 | 90 | |
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88 | 91 | void DataSource::setAntialiasing(bool enabled) |
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89 | 92 | { |
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90 | 93 | m_appViewer->setRenderHint(QPainter::Antialiasing, enabled); |
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91 | 94 | } |
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