QPointF

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

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.

Hierarchy

• Component

  ↳ QPointF

Index

Constructors

• constructor

Properties

• native

Methods

• isNull
• manhattanLength
• setX
• setY
• toPoint
• transposed
• x
• y
• dotProduct

Constructors

constructor

+ new QPointF(nativeOrXOrQPoint?: NativeElement | number | QPoint, y: number): QPointF

Overrides Component.constructor

Parameters:

Name	Type	Default
nativeOrXOrQPoint?	NativeElement | number | QPoint	-
y	number	0

Returns: QPointF

Properties

native

• native: NativeElement | null

Inherited from Component.native

Methods

isNull

▸ isNull(): boolean

Returns true if both the x and y coordinates are set to 0.0 (ignoring the sign); otherwise returns false.

Returns: boolean

---

manhattanLength

▸ manhattanLength(): number

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.

Returns: number

---

setX

▸ setX(value: number): void

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

Parameters:

Name	Type
value	number

Returns: void

---

setY

▸ setY(value: number): void

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

Parameters:

Name	Type
value	number

Returns: void

---

toPoint

▸ toPoint(): QPoint

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

Returns: QPoint

---

transposed

▸ transposed(): QPointF

Returns a point with x and y coordinates exchanged

Returns: QPointF

---

x

▸ x(): number

Returns the x coordinate of this point

Returns: number

---

y

▸ y(): number

Returns the y coordinate of this point

Returns: number

---

Static dotProduct

▸ dotProduct(p1: QPointF, p2: QPointF): number

Returns the dot product of p1 and p2

Parameters:

Name	Type
p1	QPointF
p2	QPointF

Returns: number