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25 | 25 | <li><a href="qpieslice.html">QPieSlice</a></li> |
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26 | 26 | <li><a href="qscatterseries.html">QScatterSeries</a></li> |
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27 | 27 | <li><a href="qseries.html">QSeries</a></li> |
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28 | <li><a href="qsplineseries.html">QSplineSeries</a></li> | |
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28 | 29 | <li><a href="qstackedbarseries.html">QStackedBarSeries</a></li> |
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29 | 30 | </ul> |
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30 | 31 | </td> |
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1 | 1 | #include "qsplineseries.h" |
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2 | 2 | |
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3 | /*! | |
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4 | \class QSplineSeries | |
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5 | \brief Series type used to store data needed to draw a spline. | |
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6 | ||
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7 | QSplineSeries stores the data points along with the segment control points needed by QPainterPath to draw spline | |
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8 | Control points are automatically calculated when data changes. The algorithm computes the points so that the normal spline can be drawn. | |
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9 | */ | |
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10 | ||
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11 | /*! | |
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12 | \fn QSeriesType QSplineSeries::type() const | |
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13 | Returns the type of the series | |
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14 | */ | |
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15 | ||
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16 | /*! | |
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17 | \fn QSeriesType QSplineSeries::controlPoint(int index) const | |
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18 | Returns the control point specified by \a index | |
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19 | */ | |
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20 | ||
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3 | 21 | QTCOMMERCIALCHART_BEGIN_NAMESPACE |
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4 | 22 | |
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23 | /*! | |
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24 | Constructs empty series object which is a child of \a parent. | |
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25 | When series object is added to QChartView or QChart instance then the ownerships is transfered. | |
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26 | */ | |
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27 | ||
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5 | 28 | QSplineSeries::QSplineSeries(QObject *parent) : |
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6 | 29 | QLineSeries(parent) |
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7 | 30 | { |
| @@ -10,11 +33,15 QSplineSeries::QSplineSeries(QObject *parent) : | |||
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10 | 33 | connect(this,SIGNAL(pointReplaced(int)), this, SLOT(updateControlPoints())); |
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11 | 34 | } |
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12 | 35 | |
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36 | /*! | |
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37 | \internal | |
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38 | Calculates control points which are needed by QPainterPath.cubicTo function to draw the cubic Bezier cureve between two points. | |
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39 | */ | |
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13 | 40 | void QSplineSeries::calculateControlPoints() |
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14 | 41 | { |
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15 | 42 | |
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16 | 43 | // Based on http://www.codeproject.com/Articles/31859/Draw-a-Smooth-Curve-through-a-Set-of-2D-Points-wit |
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17 |
// CPOL Licen |
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44 | // CPOL License | |
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18 | 45 | |
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19 | 46 | int n = m_x.size() - 1; |
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20 | 47 | if (n == 1) |
| @@ -74,6 +101,9 void QSplineSeries::calculateControlPoints() | |||
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74 | 101 | } |
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75 | 102 | } |
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76 | 103 | |
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104 | /*! | |
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105 | \internal | |
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106 | */ | |
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77 | 107 | QList<qreal> QSplineSeries::getFirstControlPoints(QList<qreal> rhs) |
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78 | 108 | { |
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79 | 109 | QList<qreal> x; // Solution vector. |
| @@ -94,6 +124,10 QList<qreal> QSplineSeries::getFirstControlPoints(QList<qreal> rhs) | |||
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94 | 124 | return x; |
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95 | 125 | } |
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96 | 126 | |
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127 | /*! | |
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128 | \internal | |
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129 | Updates the control points, besed on currently avaiable knots. | |
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130 | */ | |
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97 | 131 | void QSplineSeries::updateControlPoints() |
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98 | 132 | { |
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99 | 133 | if(m_x.size() > 1) |
| @@ -17,7 +17,7 class QSplineSeries : public QLineSeries | |||
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17 | 17 | QSplineSeries(QObject *parent = 0); |
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18 | 18 | QSeriesType type() const { return QSeries::SeriesTypeSpline; } |
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19 | 19 | |
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20 | int count() const { return m_x.size(); } | |
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20 | // int count() const { return m_x.size(); } | |
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21 | 21 | QPointF controlPoint(int index) const { return m_controlPoints[index]; } |
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22 | 22 | |
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23 | 23 | private: |
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