KissCount/lib/libkdchart/src/KDChartPolarCoordinatePlane_p.h

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2012-01-28 15:54:17 +01:00
/****************************************************************************
** Copyright (C) 2001-2011 Klaralvdalens Datakonsult AB. All rights reserved.
**
** This file is part of the KD Chart library.
**
** Licensees holding valid commercial KD Chart licenses may use this file in
** accordance with the KD Chart Commercial License Agreement provided with
** the Software.
**
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 and version 3 as published by the
** Free Software Foundation and appearing in the file LICENSE.GPL.txt included.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** Contact info@kdab.com if any conditions of this licensing are not
** clear to you.
**
**********************************************************************/
#ifndef KDCHARTPOLARCOORDINATEPLANE_P_H
#define KDCHARTPOLARCOORDINATEPLANE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the KD Chart API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "KDChartAbstractCoordinatePlane_p.h"
#include "KDChartZoomParameters.h"
#include "KDChartPolarGrid.h"
#include <KDABLibFakes>
namespace KDChart {
/**
* \internal
*/
struct PolarCoordinatePlane::CoordinateTransformation
{
// represents the distance of the diagram coordinate origin to the
// origin of the coordinate plane space:
QPointF originTranslation;
double radiusUnit;
double angleUnit;
double minValue;
qreal startPosition;
ZoomParameters zoom;
static QPointF polarToCartesian( double R, double theta )
{
// de-inline me
return QPointF( R * cos( DEGTORAD( theta ) ), R * sin( DEGTORAD( theta ) ) );
}
inline const QPointF translate( const QPointF& diagramPoint ) const
{
// ### de-inline me
// calculate the polar coordinates
const double x = (diagramPoint.x() * radiusUnit) - (minValue * radiusUnit);
//qDebug() << x << "=" << diagramPoint.x() << "*" << radiusUnit << " startPosition: " << startPosition;
const double y = ( diagramPoint.y() * -angleUnit) - 90.0 - startPosition;
// convert to cartesian coordinates
QPointF cartesianPoint = polarToCartesian( x, y );
cartesianPoint.setX( cartesianPoint.x() * zoom.xFactor );
cartesianPoint.setY( cartesianPoint.y() * zoom.yFactor );
QPointF newOrigin = originTranslation;
double minOrigin = qMin( newOrigin.x(), newOrigin.y() );
newOrigin.setX( newOrigin.x() + minOrigin * ( 1 - zoom.xCenter * 2 ) * zoom.xFactor );
newOrigin.setY( newOrigin.y() + minOrigin * ( 1 - zoom.yCenter * 2 ) * zoom.yFactor );
return newOrigin + cartesianPoint;
}
inline const QPointF translatePolar( const QPointF& diagramPoint ) const
{
// ### de-inline me
return QPointF( diagramPoint.x() * angleUnit, diagramPoint.y() * radiusUnit );
}
};
class PolarCoordinatePlane::Private : public AbstractCoordinatePlane::Private
{
friend class PolarCoordinatePlane;
public:
explicit Private()
: currentTransformation(0)
, initialResizeEventReceived(false )
, hasOwnGridAttributesCircular ( false )
, hasOwnGridAttributesSagittal ( false )
{}
virtual ~Private() { }
virtual void initialize()
{
grid = new PolarGrid();
}
// the coordinate plane will calculate coordinate transformations for all
// diagrams and store them here:
CoordinateTransformationList coordinateTransformations;
// when painting, this pointer selects the coordinate transformation for
// the current diagram:
CoordinateTransformation* currentTransformation;
// the reactangle occupied by the diagrams, in plane coordinates
QRectF contentRect;
// true after the first resize event came in
bool initialResizeEventReceived;
// true after setGridAttributes( Qt::Orientation ) was used,
// false if resetGridAttributes( Qt::Orientation ) was called
bool hasOwnGridAttributesCircular;
bool hasOwnGridAttributesSagittal;
GridAttributes gridAttributesCircular;
GridAttributes gridAttributesSagittal;
qreal newZoomX, newZoomY;
};
KDCHART_IMPL_DERIVED_PLANE(PolarCoordinatePlane, AbstractCoordinatePlane)
}
#endif /* KDCHARTBARDIAGRAM_P_H */