QLineF Class Reference

#include <qline.h>

Class Description

Definition at line 212 of file qline.h.

Public Types
enum	IntersectType { NoIntersection, BoundedIntersection, UnboundedIntersection }

Public Member Functions
	QLineF ()
	QLineF (const QPointF &pt1, const QPointF &pt2)
	QLineF (qreal x1, qreal y1, qreal x2, qreal y2)
	QLineF (const QLine &line)
bool	isNull () const
QPointF	p1 () const
QPointF	p2 () const
qreal	x1 () const
qreal	y1 () const
qreal	x2 () const
qreal	y2 () const
qreal	dx () const
qreal	dy () const
qreal	length () const
void	setLength (qreal len)
qreal	angle () const
void	setAngle (qreal angle)
qreal	angleTo (const QLineF &l) const
QLineF	unitVector () const
QLineF	normalVector () const
IntersectType	intersect (const QLineF &l, QPointF *intersectionPoint) const
qreal	angle (const QLineF &l) const
QPointF	pointAt (qreal t) const
void	translate (const QPointF &p)
void	translate (qreal dx, qreal dy)
QLineF	translated (const QPointF &p) const
QLineF	translated (qreal dx, qreal dy) const
void	setP1 (const QPointF &p1)
void	setP2 (const QPointF &p2)
void	setPoints (const QPointF &p1, const QPointF &p2)
void	setLine (qreal x1, qreal y1, qreal x2, qreal y2)
bool	operator== (const QLineF &d) const
bool	operator!= (const QLineF &d) const
QLine	toLine () const

Static Public Member Functions
static QLineF	fromPolar (qreal length, qreal angle)

Member Enumeration Documentation

enum IntersectType

Enumerator
NoIntersection
BoundedIntersection
UnboundedIntersection

Definition at line 215 of file qline.h.

{ NoIntersection, BoundedIntersection, UnboundedIntersection };

Constructor & Destructor Documentation

QLineF ( )

inline

Definition at line 280 of file qline.h.

{
}

QLineF ( const QPointF &  pt1, const QPointF &  pt2  )

inline

Definition at line 284 of file qline.h.

    : pt1(apt1), pt2(apt2)
{
}

QLineF ( qreal  x1, qreal  y1, qreal  x2, qreal  y2  )

inline

Definition at line 289 of file qline.h.

    : pt1(x1pos, y1pos), pt2(x2pos, y2pos)
{
}

QLineF ( const QLine &  line )

inline

Definition at line 220 of file qline.h.

: pt1(line.p1()), pt2(line.p2()) { }

Member Function Documentation

static QLineF fromPolar ( qreal  length, qreal  angle  )

static

bool isNull

(

)

const

QPointF p1 ( ) const

inline

Definition at line 314 of file qline.h.

{
    return pt1;
}

QPointF p2 ( ) const

inline

Definition at line 319 of file qline.h.

{
    return pt2;
}

qreal x1 ( ) const

inline

Definition at line 294 of file qline.h.

{
    return pt1.x();
}

qreal y1 ( ) const

inline

Definition at line 299 of file qline.h.

{
    return pt1.y();
}

qreal x2 ( ) const

inline

Definition at line 304 of file qline.h.

{
    return pt2.x();
}

qreal y2 ( ) const

inline

Definition at line 309 of file qline.h.

{
    return pt2.y();
}

qreal dx ( ) const

inline

Definition at line 324 of file qline.h.

{
    return pt2.x() - pt1.x();
}

qreal dy ( ) const

inline

Definition at line 329 of file qline.h.

{
    return pt2.y() - pt1.y();
}

qreal length

(

)

const

void setLength ( qreal  len )

inline

Definition at line 360 of file qline.h.

{
    if (isNull())
        return;
    QLineF v = unitVector();
    pt2 = QPointF(pt1.x() + v.dx() * len, pt1.y() + v.dy() * len);
}

qreal angle

(

)

const

void setAngle

(

qreal

angle

)

qreal angleTo

(

const QLineF &

l

)

const

QLineF unitVector

(

)

const

QLineF normalVector ( ) const

inline

Definition at line 334 of file qline.h.

{
    return QLineF(p1(), p1() + QPointF(dy(), -dx()));
}

IntersectType intersect	(	const QLineF &	l,
		QPointF *	intersectionPoint
	)		const

qreal angle

(

const QLineF &

l

)

const

QPointF pointAt ( qreal  t ) const

inline

Definition at line 368 of file qline.h.

{
    qreal vx = pt2.x() - pt1.x();
    qreal vy = pt2.y() - pt1.y();
    return QPointF(pt1.x() + vx * t, pt1.y() + vy * t);
}

void translate ( const QPointF &  p )

inline

Definition at line 339 of file qline.h.

{
    pt1 += point;
    pt2 += point;
}

void translate ( qreal  dx, qreal  dy  )

inline

Definition at line 345 of file qline.h.

{
    this->translate(QPointF(adx, ady));
}

QLineF translated ( const QPointF &  p ) const

inline

Definition at line 350 of file qline.h.

{
    return QLineF(pt1 + p, pt2 + p);
}

QLineF translated ( qreal  dx, qreal  dy  ) const

inline

Definition at line 355 of file qline.h.

{
    return translated(QPointF(adx, ady));
}

void setP1 ( const QPointF &  p1 )

inline

Definition at line 381 of file qline.h.

{
    pt1 = aP1;
}

void setP2 ( const QPointF &  p2 )

inline

Definition at line 386 of file qline.h.

{
    pt2 = aP2;
}

void setPoints ( const QPointF &  p1, const QPointF &  p2  )

inline

Definition at line 391 of file qline.h.

{
    pt1 = aP1;
    pt2 = aP2;
}

void setLine ( qreal  x1, qreal  y1, qreal  x2, qreal  y2  )

inline

Definition at line 397 of file qline.h.

{
    pt1 = QPointF(aX1, aY1);
    pt2 = QPointF(aX2, aY2);
}

bool operator== ( const QLineF &  d ) const

inline

Definition at line 404 of file qline.h.

{
    return pt1 == d.pt1 && pt2 == d.pt2;
}

bool operator!= ( const QLineF &  d ) const

inline

Definition at line 267 of file qline.h.

{ return !(*this == d); }

QLine toLine ( ) const

inline

Definition at line 375 of file qline.h.

{
    return QLine(pt1.toPoint(), pt2.toPoint());
}

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The documentation for this class was generated from the following file:

• QtCore/qline.h