QLineF Class Reference

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Detailed Description

Definition at line 212 of file qline.h.

#include <qline.h>

List of all members.

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)

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Member Enumeration Documentation

enum IntersectType

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Enumerator:

NoIntersection	Search for all occurrences
BoundedIntersection	Search for all occurrences
UnboundedIntersection	Search for all occurrences

Definition at line 215 of file qline.h.

{ NoIntersection, BoundedIntersection, UnboundedIntersection };

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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()) { }

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Member Function Documentation

static QLineF fromPolar	(	qreal	length,
		qreal	angle
	)		[static]

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bool isNull

(

)

const

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QPointF p1

(

)

const [inline]

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Definition at line 314 of file qline.h.

{
    return pt1;
}

QPointF p2

(

)

const [inline]

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Definition at line 319 of file qline.h.

{
    return pt2;
}

qreal x1

(

)

const [inline]

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Definition at line 294 of file qline.h.

{
    return pt1.x();
}

qreal y1

(

)

const [inline]

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Definition at line 299 of file qline.h.

{
    return pt1.y();
}

qreal x2

(

)

const [inline]

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Definition at line 304 of file qline.h.

{
    return pt2.x();
}

qreal y2

(

)

const [inline]

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Definition at line 309 of file qline.h.

{
    return pt2.y();
}

qreal dx

(

)

const [inline]

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Definition at line 324 of file qline.h.

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

qreal dy

(

)

const [inline]

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Definition at line 329 of file qline.h.

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

qreal length

(

)

const

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void setLength

(

qreal

len

)

[inline]

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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

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void setAngle

(

qreal

angle

)

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qreal angleTo

(

const QLineF &

l

)

const

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QLineF unitVector

(

)

const

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QLineF normalVector

(

)

const [inline]

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Definition at line 334 of file qline.h.

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

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

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qreal angle

(

const QLineF &

l

)

const

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QPointF pointAt

(

qreal

t

)

const [inline]

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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]

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Definition at line 339 of file qline.h.

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

void translate	(	qreal	dx,
		qreal	dy
	)		[inline]

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Definition at line 345 of file qline.h.

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

QLineF translated

(

const QPointF &

p

)

const [inline]

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Definition at line 350 of file qline.h.

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

QLineF translated	(	qreal	dx,
		qreal	dy
	)		const [inline]

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Definition at line 355 of file qline.h.

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

void setP1

(

const QPointF &

p1

)

[inline]

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Definition at line 381 of file qline.h.

{
    pt1 = aP1;
}

void setP2

(

const QPointF &

p2

)

[inline]

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Definition at line 386 of file qline.h.

{
    pt2 = aP2;
}

void setPoints	(	const QPointF &	p1,
		const QPointF &	p2
	)		[inline]

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Definition at line 391 of file qline.h.

{
    pt1 = aP1;
    pt2 = aP2;
}

void setLine	(	qreal	x1,
		qreal	y1,
		qreal	x2,
		qreal	y2
	)		[inline]

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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]

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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