BPoint

Data Members

float x

The coordinate value measured horizontally along the x-axis.

float y

The coordinate value measured vertically along the y-axis.

Constructor and Destructor

BPoint()

inline BPoint::BPoint(float x, float y)
inline BPoint::BPoint(const BPoint &point)
inline BPoint::BPoint()

Creates a new BPoint object that corresponds to the point (x, y), or BPoint that’s copied from point. If no coordinate values are assigned, the BPoint’s location is indeterminate.

See also: Set(), the assignment operator

Member Functions

ConstrainTo()

void BPoint::ConstrainTo(BRect rect)

Ensures that the BPoint lies within rect. If it’s already contained in the rectangle, the BPoint is unchanged; otherwise, it’s moved to the rect’s nearest edge.

See also: BRect::Contains()

PrintToStream()

void BPoint::PrintToStream() const

Prints the BPoint’s coordinates to standard output in the form:

"BPoint(x, y)"

Set()

inline void BPoint::Set(float x, float y)

Sets the BPoint’s x and y coordinates.

Operators

inline BPoint &operator=(const BPoint &from)

Copies from’s coordinate data into the left-side object.

bool operator==(BPoint) const

bool operator!=(BPoint) const

== returns true if the two objects’ point exactly coincide.

!= returns true if the two objects’ points don’t coincide.

BPoint operator+(const BPoint&) const

BPoint operator+=(const BPoint&) const

+ creates and returns a new BPoint that adds the two operands together. The new object’s x coordinate is the sum of the operands’ x values; its y value is the sum of the operands’ y values.

+= adds the operands together and stores the result in the left operand.

BPoint operator-(const BPoint&) const

BPoint operator-=(const BPoint&) const

- creates and returns a new BPoint that subtracts the right operand from the left. The new object’s x coordinate is the difference between the operands’ x values; its y value is the difference between the operands’ y values.

-= performs the subtraction and stores the result in the left operand.

Global Objects

B_ORIGIN

BPoint object that represents (0.0, 0.0).