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Refactor to use qseries private for implmentation interface...
Refactor to use qseries private for implmentation interface * adds missing headers private stacked, percent bar series * refactors dataset switch case -> scaleDomain * refactors presenter switch case -> createGraphics
Michal Klocek - - Load All Authors

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qsplineseries.cpp
236 lines | 8.1 KiB | text/x-c | CppLexer
/ src / splinechart / qsplineseries.cpp
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Jani Honkonen
Add license headers
 r794 /****************************************************************************
**
** 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
** $QT_END_LICENSE$
**
****************************************************************************/
Marek Rosa
Spline initial
 r295 #include "qsplineseries.h"
Michal Klocek
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 r938 #include "qsplineseries_p.h"
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 r943 #include "splinechartitem_p.h"
#include "chartdataset_p.h"
#include "charttheme_p.h"
#include "chartanimator_p.h"
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Spline initial
 r295
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QSplineSeries documentation added
 r433 /*!
\class QSplineSeries
\brief Series type used to store data needed to draw a spline.
QSplineSeries stores the data points along with the segment control points needed by QPainterPath to draw spline
Control points are automatically calculated when data changes. The algorithm computes the points so that the normal spline can be drawn.
*/
/*!
\fn QSeriesType QSplineSeries::type() const
Returns the type of the series
*/
/*!
\fn QSeriesType QSplineSeries::controlPoint(int index) const
Returns the control point specified by \a index
*/
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 r401 QTCOMMERCIALCHART_BEGIN_NAMESPACE
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QSplineSeries documentation added
 r433 /*!
Constructs empty series object which is a child of \a parent.
When series object is added to QChartView or QChart instance then the ownerships is transfered.
*/
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Spline initial
 r295 QSplineSeries::QSplineSeries(QObject *parent) :
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 r938 QLineSeries(*new QSplineSeriesPrivate(this),parent)
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Spline initial
 r295 {
}
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 r305
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 r938 QSeries::QSeriesType QSplineSeries::type() const
{
return QSeries::SeriesTypeSpline;
}
QPointF QSplineSeries::controlPoint(int index) const
{
Q_D(const QSplineSeries);
return d->m_controlPoints[index];
}
void QSplineSeries::setModelMappingRange(int first, int count)
{
Q_D(QSplineSeries);
QLineSeries::setModelMappingRange(first, count);
d->calculateControlPoints();
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
QSplineSeriesPrivate::QSplineSeriesPrivate(QSplineSeries* q):QLineSeriesPrivate(q)
{
QObject::connect(this,SIGNAL(pointAdded(int)), this, SLOT(updateControlPoints()));
QObject::connect(this,SIGNAL(pointRemoved(int)), this, SLOT(updateControlPoints()));
QObject::connect(this,SIGNAL(pointReplaced(int)), this, SLOT(updateControlPoints()));
};
Marek Rosa
QSplineSeries documentation added
 r433 /*!
\internal
Calculates control points which are needed by QPainterPath.cubicTo function to draw the cubic Bezier cureve between two points.
*/
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 r938 void QSplineSeriesPrivate::calculateControlPoints()
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Spline working somewhat
 r401 {
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 r938 Q_Q(QSplineSeries);
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Spline working somewhat
 r401 // Based on http://www.codeproject.com/Articles/31859/Draw-a-Smooth-Curve-through-a-Set-of-2D-Points-wit
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QSplineSeries documentation added
 r433 // CPOL License
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 r401
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 r938 int n = q->count() - 1;
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 r401 if (n == 1)
{ // Special case: Bezier curve should be a straight line.
// firstControlPoints = new Point[1];
// 3P1 = 2P0 + P3
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Adds big fat pimpl to series classes...
 r938 m_controlPoints.append(QPointF((2 * q->x(0) + q->x(1)) / 3, (2 * q->y(0) + q->y(1)) / 3));
Marek Rosa
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 r401
// P2 = 2P1 P0
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 r938 m_controlPoints.append(QPointF(2 * m_controlPoints[0].x() - q->x(0), 2 * m_controlPoints[0].y() - q->y(0)));
Marek Rosa
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 r401 return;
Marek Rosa
Further changes
 r318 }
Marek Rosa
Spline working somewhat
 r401 // Calculate first Bezier control points
// Right hand side vector
// Set of equations for P0 to Pn points.
//
// | 2 1 0 0 ... 0 0 0 ... 0 0 0 | | P1_1 | | P0 + 2 * P1 |
// | 1 4 1 0 ... 0 0 0 ... 0 0 0 | | P1_2 | | 4 * P1 + 2 * P2 |
// | 0 1 4 1 ... 0 0 0 ... 0 0 0 | | P1_3 | | 4 * P2 + 2 * P3 |
// | . . . . . . . . . . . . | | ... | | ... |
// | 0 0 0 0 ... 1 4 1 ... 0 0 0 | * | P1_i | = | 4 * P(i-1) + 2 * Pi |
// | . . . . . . . . . . . . | | ... | | ... |
// | 0 0 0 0 0 0 0 0 ... 1 4 1 | | P1_(n-1)| | 4 * P(n-2) + 2 * P(n-1) |
// | 0 0 0 0 0 0 0 0 ... 0 2 7 | | P1_n | | 8 * P(n-1) + Pn |
//
QList<qreal> rhs;
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 r938 rhs.append(q->x(0) + 2 * q->x(1));
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Spline working somewhat
 r401
// Set right hand side X values
Marek Rosa
Fixed a bug with last two control points calculation
 r429 for (int i = 1; i < n - 1; ++i)
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 r938 rhs.append(4 * q->x(i) + 2 * q->x(i + 1));
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 r401
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 r938 rhs.append((8 * q->x(n - 1) + q->x(n)) / 2.0);
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Spline working somewhat
 r401 // Get first control points X-values
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Table model data example
 r519 QList<qreal> xControl = getFirstControlPoints(rhs);
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 r938 rhs[0] = q->y(0) + 2 * q->y(1);
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 r401
// Set right hand side Y values
Marek Rosa
Fixed a bug with last two control points calculation
 r429 for (int i = 1; i < n - 1; ++i)
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Adds big fat pimpl to series classes...
 r938 rhs[i] = 4 * q->y(i) + 2 * q->y(i + 1);
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 r401
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 r938 rhs[n - 1] = (8 * q->y(n - 1) + q->y(n)) / 2.0;
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 r401 // Get first control points Y-values
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Table model data example
 r519 QList<qreal> yControl = getFirstControlPoints(rhs);
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 r401
// Fill output arrays.
sauimone
minor code review issues. indent, spaces, brackets etc.
 r743 for (int i = 0; i < n; ++i) {
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 r401 // First control point
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Table model data example
 r519 m_controlPoints.append(QPointF(xControl[i], yControl[i]));
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 r401 // Second control point
if (i < n - 1)
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 r938 m_controlPoints.append(QPointF(2 * q->x(i + 1) - xControl[i + 1], 2 * q->y(i + 1) - yControl[i + 1]));
Marek Rosa
Spline working somewhat
 r401 else
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 r938 m_controlPoints.append(QPointF((q->x(n) + xControl[n - 1]) / 2, (q->y(n) + yControl[n - 1]) / 2));
Marek Rosa
Further changes
 r318 }
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 r401 }
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QSplineSeries documentation added
 r433 /*!
\internal
*/
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 r938 QList<qreal> QSplineSeriesPrivate::getFirstControlPoints(QList<qreal> rhs)
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 r401 {
QList<qreal> x; // Solution vector.
QList<qreal> tmp; // Temp workspace.
qreal b = 2.0;
x.append(rhs[0] / b);
tmp.append(0);
sauimone
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 r743 for (int i = 1; i < rhs.size(); i++) {
// Decomposition and forward substitution.
Marek Rosa
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 r401 tmp.append(1 / b);
b = (i < rhs.size() - 1 ? 4.0 : 3.5) - tmp[i];
x.append((rhs[i] - x[i - 1]) / b);
}
for (int i = 1; i < rhs.size(); i++)
x[rhs.size() - i - 1] -= tmp[rhs.size() - i] * x[rhs.size() - i]; // Backsubstitution.
return x;
}
Marek Rosa
Added automatic refresh of control points on add/remove point. Spline example updated
 r431
Marek Rosa
QSplineSeries documentation added
 r433 /*!
\internal
Updates the control points, besed on currently avaiable knots.
*/
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 r938 void QSplineSeriesPrivate::updateControlPoints()
Marek Rosa
Added automatic refresh of control points on add/remove point. Spline example updated
 r431 {
Michal Klocek
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 r938 Q_Q(QSplineSeries);
if (q->count() > 1) {
Marek Rosa
Added automatic refresh of control points on add/remove point. Spline example updated
 r431 m_controlPoints.clear();
calculateControlPoints();
}
}
Marek Rosa
Docs updated
 r908 /*//!
Marek Rosa
Added documentation for model related funtions
 r900 \fn bool QSplineSeries::setModel(QAbstractItemModel *model)
Sets the \a model to be used as a data source
\sa setModelMapping(), setModelMappingRange()
*/
//bool QSplineSeries::setModel(QAbstractItemModel* model)
//{
// QXYSeries::setModel(model);
//// calculateControlPoints();
// return true;
//}
Marek Rosa
QXYSeries: model data orientation added. QBarSeries: some model data function placeholders
 r527
Marek Rosa
Docs updated
 r908 /*//!
\fn bool QSplineSeries::setModelMapping(int modelX, int modelY, Qt::Orientation orientation)
Marek Rosa
Added documentation for model related funtions
 r900 Sets the \a modelX to be used as a data source for x coordinate and \a modelY to be used
as a data source for y coordinate. The \a orientation paramater specifies whether the data
is in columns or in rows.
*/
//void QSplineSeries::setModelMapping(int modelX, int modelY, Qt::Orientation orientation)
//{
// QLineSeries::setModelMapping(modelX, modelY, orientation);
//// calculateControlPoints();
//}
Marek Rosa
XYSeries: added support for limited mapping area
 r734
Marek Rosa
Added documentation for model related funtions
 r900 /*!
\fn bool QSplineSeries::setModelMappingRange(int first, int count)
Allows limiting the model mapping.
Parameter \a first specifies which element of the model should be used as a first one of the series.
Parameter \a count specifies how many elements should be mapped. If count is not specified (defaults to -1)
then all the items following \a first item in a model are used.
\sa setModel(), setModelMapping()
*/
Marek Rosa
Table model data example
 r519
Michal Klocek
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 r943 Chart* QSplineSeriesPrivate::createGraphics(ChartPresenter* presenter)
{
Q_Q(QSplineSeries);
SplineChartItem* spline = new SplineChartItem(q,presenter);
if(presenter->animationOptions().testFlag(QChart::SeriesAnimations)) {
presenter->animator()->addAnimation(spline);
}
presenter->chartTheme()->decorate(q, presenter->dataSet()->seriesIndex(q));
return spline;
}
Marek Rosa
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 r401 #include "moc_qsplineseries.cpp"
Michal Klocek
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 r938 #include "moc_qsplineseries_p.cpp"
Marek Rosa
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 r401
QTCOMMERCIALCHART_END_NAMESPACE