QwtDoublePoint

Section: Qwt User's Guide (3) Updated: 16 Nov 2004 Local index Up

NAME

QwtDoublePoint -

SYNOPSIS

Detailed Description

The QwtDoublePoint class defines a point in double coordinates

Definition at line 22 of file qwt_double_rect.h.

Public Member Functions

QwtDoublePoint ()

QwtDoublePoint (double x, double y)

QwtDoublePoint (const QPoint &)

bool isNull () const

double x () const

double y () const

void setX (double x)

void setY (double y)

double & rx ()

double & ry ()

bool operator== (const QwtDoublePoint &) const

bool operator!= (const QwtDoublePoint &) const

const QwtDoublePoint operator- () const

const QwtDoublePoint operator+ (const QwtDoublePoint &) const

const QwtDoublePoint operator- (const QwtDoublePoint &) const

const QwtDoublePoint operator * (double) const

const QwtDoublePoint operator/ (double) const

QwtDoublePoint & operator+= (const QwtDoublePoint &)

QwtDoublePoint & operator-= (const QwtDoublePoint &)

QwtDoublePoint & operator *= (double)

QwtDoublePoint & operator/= (double)

Constructor & Destructor Documentation

QwtDoublePoint::QwtDoublePoint ()

Constructs a point with coordinates (0.0, 0.0) (isNull() returns TRUE).

Definition at line 14 of file qwt_double_rect.cpp.

Referenced by operator *(), operator+(), operator-(), and operator/().

QwtDoublePoint::QwtDoublePoint (double x, double y)

Constructs a point with x value xpos and y value ypos.

Definition at line 22 of file qwt_double_rect.cpp.

QwtDoublePoint::QwtDoublePoint (const QPoint &)

Copy constructor.

Definition at line 29 of file qwt_double_rect.cpp.

Member Function Documentation

bool QwtDoublePoint::isNull () const

Returns TRUE if both the x value and the y value are 0; otherwise returns FALSE. Definition at line 181 of file qwt_double_rect.h.

const QwtDoublePoint QwtDoublePoint::operator * (double) const

Returns the point formed by multiplying both components by c.

Definition at line 81 of file qwt_double_rect.cpp.

References QwtDoublePoint().

QwtDoublePoint & QwtDoublePoint::operator *= (double)

Multiplies this point's x and y by c, and returns a reference to this point.

Definition at line 113 of file qwt_double_rect.cpp.

bool QwtDoublePoint::operator!= (const QwtDoublePoint &) const

Returns TRUE if point and other are not equal; otherwise returns FALSE.

Definition at line 42 of file qwt_double_rect.cpp.

References operator==().

const QwtDoublePoint QwtDoublePoint::operator+ (const QwtDoublePoint & other) const

Returns the point formed by adding both components by the components of other. Each component is added separately. Definition at line 62 of file qwt_double_rect.cpp.

References d_x, d_y, and QwtDoublePoint().

QwtDoublePoint & QwtDoublePoint::operator+= (const QwtDoublePoint &)

Adds point other to this point and returns a reference to this point.

Definition at line 95 of file qwt_double_rect.cpp.

References d_x, and d_y.

const QwtDoublePoint QwtDoublePoint::operator- (const QwtDoublePoint & other) const

Returns the point formed by subtracting both components by the components of other. Each component is subtracted separately. Definition at line 73 of file qwt_double_rect.cpp.

References d_x, d_y, and QwtDoublePoint().

const QwtDoublePoint QwtDoublePoint::operator- () const

Returns the point formed by changing the sign of both components, equivalent to QDoublePoint(-x(), -y()); Definition at line 52 of file qwt_double_rect.cpp.

References QwtDoublePoint().