MFC : CPoint + CPoint Class Members

CPoint

CPoint::CPoint

CPoint::CPoint

CPoint( );

CPoint( int initX, int initY );

CPoint( POINT initPt );

CPoint( SIZE initSize );

CPoint( DWORD dwPoint );

Parameters

initX

Specifies the value of the x member of CPoint.

initY

Specifies the value of the y member of CPoint.

initPt

POINT structure or CPoint that specifies the values used to initialize CPoint.

initSize

  SIZE structure or CSize that specifies the values used to initialize CPoint.

dwPoint

Sets the x member to the low-order word of dwPoint and the y member to the high-order word of dwPoint.

Remarks

Constructs a CPoint object. If no arguments are given, x and y members are not initialized.

Example

CPoint   ptUndefined;
CPoint   ptTopLeft(0,0);

// works from a POINT, too

POINT   ptHere;
ptHere.x = 35;
ptHere.y = 95;

CPoint   ptMFCHere(ptHere);

// works from A SIZE

SIZE   sHowBig;
sHowBig.cx = 300;
sHowBig.cy = 10;

CPoint ptMFCBig(sHowBig);

// or from a DWORD

DWORD   dwSize;
dwSize = MAKELONG(35, 95);

CPoint ptFromDouble(dwSize);
ASSERT(ptFromDouble == ptMFCHere);

CPoint Class Members

CPoint Class Members

Construction

CPoint

Constructs a CPoint.

Operations

Offset	Adds values to the x and y members of the CPoint.
operator ==	Checks for equality between two points.
operator !=	Checks for inequality between two points.

Operators Returning CPoint Values

operator +=	Offsets CPoint by adding a size or point.
operator –=	Offsets CPoint by subtracting a size or point.
operator +	Returns the sum of a CPoint and a size or point.
operator –	Returns the difference of a CPoint and a size, or the negation of a point.

Operators Returning CSize Values

operator –

Returns the size difference between two points.

Operators Returning CRect Values

operator +	Returns a CRect offset by a size.
operator –	Returns a CRect offset by a negative size.