KDChartLayoutItems.h File Reference

#include <QBrush>
#include <QFont>
#include <QFontMetricsF>
#include <QLayout>
#include <QLayoutItem>
#include <QPen>
#include "KDChartTextAttributes.h"
#include "KDChartMarkerAttributes.h"

Include dependency graph for KDChartLayoutItems.h:

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Namespaces
namespace	KDChart
Classes
class	KDChart::AbstractLayoutItem
	Base class for all layout items of KD Chart. More...
class	KDChart::AutoSpacerLayoutItem
	An empty layout item. More...
class	KDChart::HorizontalLineLayoutItem
	Layout item showing a horizontal line. More...
class	KDChart::LineLayoutItem
	Layout item showing a coloured line. More...
class	KDChart::LineWithMarkerLayoutItem
	Layout item showing a coloured line and a data point marker. More...
class	KDChart::MarkerLayoutItem
	Layout item showing a data point marker. More...
class	KDChart::TextBubbleLayoutItem
class	KDChart::TextLayoutItem
	Layout item showing a text. More...
class	KDChart::VerticalLineLayoutItem
	Layout item showing a vertial line. More...
Functions
QPointF	rotatedPoint (const QPointF &pt, qreal rotation, const QPointF &center=QPointF())
QRectF	rotatedRect (const QRectF &pt, qreal rotation, const QPointF &center=QPointF())

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Function Documentation

QPointF rotatedPoint	(	const QPointF &	pt,
		qreal	rotation,
		const QPointF &	center = QPointF()
	)

Definition at line 334 of file KDChartLayoutItems.cpp.

References PI.

{
    const qreal angle = PI * rotation / 180.0;
    const qreal cosAngle = cos( angle );
    const qreal sinAngle = -sin( angle );
    return QPointF(
            (cosAngle * ( pt.x() - center.x() ) + sinAngle * ( pt.y() - center.y() ) ),
            (cosAngle * ( pt.y() - center.y() ) - sinAngle * ( pt.x() - center.x() ) ) ) + center;
}

QRectF rotatedRect	(	const QRectF &	pt,
		qreal	rotation,
		const QPointF &	center = QPointF()
	)

Definition at line 345 of file KDChartLayoutItems.cpp.

References PI.

Referenced by KDChart::TextLayoutItem::paint().

{
    const QRect rect( oldRect.translated( center ).toRect() );
    const qreal angle = PI * angleInt / 180.0;
    const qreal cosAngle = cos( angle );
    const qreal sinAngle = sin( angle );
    QMatrix rotationMatrix(cosAngle, sinAngle, -sinAngle, cosAngle, 0, 0);
    QPolygon rotPts;
    rotPts <<  rotationMatrix.map(rect.topLeft()) //QPoint(0,0)
            << rotationMatrix.map(rect.topRight())
            << rotationMatrix.map(rect.bottomRight())
            << rotationMatrix.map(rect.bottomLeft());
            //<< rotatedPoint(rect.topRight(), angleInt, center).toPoint()
            //<< rotatedPoint(rect.bottomRight(), angleInt, center).toPoint()
            //<< rotatedPoint(rect.bottomLeft(), angleInt, center).toPoint();
    return rotPts.boundingRect();
/*
    const QPointF topLeft( rotatedPoint( oldRect.topLeft(), angle, center ) );
    const QPointF topRight( rotatedPoint( oldRect.topRight(), angle, center ) );
    const QPointF bottomLeft( rotatedPoint( oldRect.bottomLeft(), angle, center ) );
    const QPointF bottomRight( rotatedPoint( oldRect.bottomRight(), angle, center ) );

    const qreal x = qMin( qMin( topLeft.x(), topRight.x() ), qMin( bottomLeft.x(), topLeft.x() ) );
    const qreal y = qMin( qMin( topLeft.y(), topRight.y() ), qMin( bottomLeft.y(), topLeft.y() ) );
    const qreal width = qMax( qMax( topLeft.x(), topRight.x() ), qMax( bottomLeft.x(), topLeft.x() ) ) - x;
    const qreal height = qMax( qMax( topLeft.y(), topRight.y() ), qMax( bottomLeft.y(), topLeft.y() ) ) - y;

    return QRectF( x, y, width, height );
*/
}

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