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