QtCore.QPointF Class Reference

The QPointF class defines a point in the plane using floating point precision. More...

Inheritance diagram for QtCore.QPointF:

Collaboration diagram for QtCore.QPointF:

Public Member Functions
override bool	Equals (object o)
override int	GetHashCode ()
	QPointF ()
	QPointF (QPoint p)
	QPointF (QPointF copy)
	QPointF (double xpos, double ypos)
virtual void	CreateProxy ()
new bool	IsNull ()
new double	ManhattanLength ()
new double	Rx ()
new double	Ry ()
new QPoint	ToPoint ()
new void	Dispose ()

Static Public Member Functions
static bool	operator!= (QPointF arg1, QPointF arg2)
static QPointF	operator* (QPointF arg1, double arg2)
static QPointF	operator+ (QPointF arg1, QPointF arg2)
static QPointF	operator- (QPointF arg1)
static QPointF	operator- (QPointF arg1, QPointF arg2)
static QPointF	operator/ (QPointF arg1, double arg2)
static bool	operator== (QPointF arg1, QPointF arg2)

Protected Member Functions
	QPointF (System.Type dummy)

Protected Attributes
SmokeInvocation	interceptor

Properties
new double	X [get, set]
new double	Y [get, set]
virtual System.IntPtr	SmokeObject [get, set]

Detailed Description

The QPointF class defines a point in the plane using floating point precision.

A point is specified by a x coordinate and an y coordinate which can be accessed using the x() and y() functions. The coordinates of the point are specified using floating point numbers for accuracy. The isNull() function returns true if both x and y are set to 0.0. The coordinates can be set (or altered) using the setX() and setY() functions, or alternatively the rx() and ry() functions which return references to the coordinates (allowing direct manipulation).

Given a point p, the following statements are all equivalent:

QPointF p;

p.setX(p.x() + 1.0);

p += QPointF(1.0, 0.0);

p.rx()++;

A QPointF object can also be used as a vector: Addition and subtraction are defined as for vectors (each component is added separately). A QPointF object can also be divided or multiplied by an int or a qreal.

In addition, the QPointF class provides a constructor converting a QPoint object into a QPointF object, and a corresponding toPoint() function which returns a QPoint copy of this point. Finally, QPointF objects can be streamed as well as compared.

See also QPoint and QPolygonF.

Constructor & Destructor Documentation

QtCore.QPointF.QPointF ( System.Type  dummy )

protected

QtCore.QPointF.QPointF

(

)

Constructs a null point, i.e. with coordinates (0.0, 0.0)

See also isNull().

QtCore.QPointF.QPointF

(

QPoint

p

)

Constructs a copy of the given point.

See also toPoint().

QtCore.QPointF.QPointF

(

QPointF

copy

)

Constructs a null point, i.e. with coordinates (0.0, 0.0)

See also isNull().

QtCore.QPointF.QPointF	(	double	xpos,
		double	ypos
	)

Constructs a null point, i.e. with coordinates (0.0, 0.0)

See also isNull().

Member Function Documentation

virtual void QtCore.QPointF.CreateProxy ( )

virtual

new void QtCore.QPointF.Dispose

(

)

override bool QtCore.QPointF.Equals

(

object

o

)

override int QtCore.QPointF.GetHashCode

(

)

new bool QtCore.QPointF.IsNull

(

)

Returns true if both the x and y coordinates are set to +0.0; otherwise returns false.

Note: Since this function treats +0.0 and -0.0 differently, points with zero-valued coordinates where either or both values have a negative sign are not defined to be null points.

new double QtCore.QPointF.ManhattanLength

(

)

Returns the sum of the absolute values of x() and y(), traditionally known as the "Manhattan length" of the vector from the origin to the point.

This function was introduced in Qt 4.6.

See also QPoint::manhattanLength().

static bool QtCore.QPointF.operator!= ( QPointF  arg1, QPointF  arg2  )

static

static QPointF QtCore.QPointF.operator* ( QPointF  arg1, double  arg2  )

static

This is an overloaded function.

Returns a copy of the given point, multiplied by the given factor.

static QPointF QtCore.QPointF.operator+ ( QPointF  arg1, QPointF  arg2  )

static

Returns a QPointF object that is the sum of the given points, p1 and p2; each component is added separately.

See also QPointF::operator+=().

static QPointF QtCore.QPointF.operator- ( QPointF  arg1 )

static

This is an overloaded function.

Returns a QPointF object that is formed by changing the sign of both components of the given point.

Equivalent to QPointF(0,0) - point.

static QPointF QtCore.QPointF.operator- ( QPointF  arg1, QPointF  arg2  )

static

Returns a QPointF object that is formed by subtracting p2 from p1; each component is subtracted separately.

See also QPointF::operator-=().

static QPointF QtCore.QPointF.operator/ ( QPointF  arg1, double  arg2  )

static

Returns the QPointF object formed by dividing both components of the given point by the given divisor.

See also QPointF::operator/=().

static bool QtCore.QPointF.operator== ( QPointF  arg1, QPointF  arg2  )

static

new double QtCore.QPointF.Rx

(

)

Returns a reference to the x coordinate of this point.

Using a reference makes it possible to directly manipulate x. For example:

QPointF p(1.1, 2.5);

p.rx()–; // p becomes (0.1, 2.5)

See also x() and setX().

new double QtCore.QPointF.Ry

(

)

Returns a reference to the y coordinate of this point.

Using a reference makes it possible to directly manipulate y. For example:

QPointF p(1.1, 2.5);

p.ry()++; // p becomes (1.1, 3.5)

See also y() and setY().

new QPoint QtCore.QPointF.ToPoint

(

)

Rounds the coordinates of this point to the nearest integer, and returns a QPoint object with the rounded coordinates.

See also QPointF().

Member Data Documentation

SmokeInvocation QtCore.QPointF.interceptor

protected

Property Documentation

virtual System.IntPtr QtCore.QPointF.SmokeObject

getset

new double QtCore.QPointF.X

getset

Returns the x-coordinate of this point.

Sets the x coordinate of this point to the given x coordinate.

new double QtCore.QPointF.Y

getset

Returns the y-coordinate of this point.

Sets the y coordinate of this point to the given y coordinate.