src/gui/painting/qpainterpath_p.h File Reference

#include "QtGui/qpainterpath.h"
#include "QtGui/qregion.h"
#include "QtCore/qlist.h"

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Classes
class	QPainterPathData
Functions
void Q_GUI_EXPORT	qt_find_ellipse_coords (const QRectF &r, qreal angle, qreal length, QPointF *startPoint, QPointF *endPoint)

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Function Documentation

void Q_GUI_EXPORT qt_find_ellipse_coords	(	const QRectF &	r,
		qreal	angle,
		qreal	length,
		QPointF *	startPoint,
		QPointF *	endPoint
	)

Definition at line 80 of file qpainterpath.cpp.

References a, ANGLE, b, QRectF::center(), QRectF::height(), and QRectF::width().

Referenced by QPainterPath::arcMoveTo(), and Q3PointArray::makeArc().

{
#define ANGLE(t) ((t) * 2 * M_PI / 360.0)
    qreal a = r.width() / 2.0;
    qreal b = r.height() / 2.0;

    if (startPoint) {
        *startPoint = r.center()
                      + QPointF(a * cos(ANGLE(angle)), -b * sin(ANGLE(angle)));
    }
    if (endPoint) {
        *endPoint = r.center()
                    + QPointF(a * cos(ANGLE(angle + length)), -b * sin(ANGLE(angle + length)));
    }
}

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