CRect类的简介

//Microsoft Visual Studio/VC98/Include/wtypes.h中

 typedef struct tagRECT {

LONG left;

LONG top;

LONG right;

LONG bottom;

} RECT;

 

//Microsoft Visual Studio/VC98/MFC/Include/afxwin.h中

class CRect : public tagRECT

{

public:

// Constructors

 

// uninitialized rectangle

 CRect();

 

// from left, top, right, and bottom

 CRect(int l, int t, int r, int b);

 

// copy constructor

CRect(const RECT& srcRect);

 

// from a pointer to another rect

CRect(LPCRECT lpSrcRect);

 

// from a point and size

CRect(POINT point, SIZE size);

 

// from two points

CRect(POINT topLeft, POINT bottomRight);

 

// Attributes (in addition to RECT members)

 

// retrieves the width

int Width() const;

 

 // returns the height

int Height() const;

 

// returns the size

CSize Size() const;

 

 // reference to the top-left point

CPoint& TopLeft();

 

 // reference to the bottom-right point

CPoint& BottomRight();

 

 // const reference to the top-left point const

 CPoint& TopLeft() const;

 

 // const reference to the bottom-right point

const CPoint& BottomRight() const;

 

// the geometric center point of the rectangle

CPoint CenterPoint() const;

 

// swap the left and right

void SwapLeftRight();

static void SwapLeftRight(LPRECT lpRect);

 

// convert between CRect and LPRECT/LPCRECT (no need for &)

operator LPRECT();

operator LPCRECT() const;

 

// returns TRUE if rectangle has no area

 BOOL IsRectEmpty() const;

 

// returns TRUE if rectangle is at (0,0) and has no area

BOOL IsRectNull() const;

 

// returns TRUE if point is within rectangle

 BOOL PtInRect(POINT point) const;

 

// Operations

// set rectangle from left, top, right, and bottom

void SetRect(int x1, int y1, int x2, int y2);

void SetRect(POINT topLeft, POINT bottomRight);

 

 // empty the rectangle

 void SetRectEmpty();

 

// copy from another rectangle

void CopyRect(LPCRECT lpSrcRect);

 

 // TRUE if exactly the same as another rectangle

 BOOL EqualRect(LPCRECT lpRect) const;

 

// inflate rectangle's width and height without

// moving its top or left

void InflateRect(int x, int y);

void InflateRect(SIZE size);

 void InflateRect(LPCRECT lpRect);

void InflateRect(int l, int t, int r, int b);

 

 // deflate the rectangle's width and height without

// moving its top or left

void DeflateRect(int x, int y);

void DeflateRect(SIZE size);

void DeflateRect(LPCRECT lpRect);

void DeflateRect(int l, int t, int r, int b);

 

// translate the rectangle by moving its top and left

void OffsetRect(int x, int y);

void OffsetRect(SIZE size);

void OffsetRect(POINT point);

void NormalizeRect();

 

// set this rectangle to intersection of two others

 BOOL IntersectRect(LPCRECT lpRect1, LPCRECT lpRect2);

 

// set this rectangle to bounding union of two others

BOOL UnionRect(LPCRECT lpRect1, LPCRECT lpRect2);

 

// set this rectangle to minimum of two others

BOOL SubtractRect(LPCRECT lpRectSrc1, LPCRECT lpRectSrc2);

 

 // Additional Operations void operator=(const RECT& srcRect);

BOOL operator==(const RECT& rect) const;

BOOL operator!=(const RECT& rect) const;

void operator+=(POINT point);

void operator+=(SIZE size);

 void operator+=(LPCRECT lpRect);

void operator-=(POINT point);

void operator-=(SIZE size);

void operator-=(LPCRECT lpRect);

void operator&=(const RECT& rect);

void operator|=(const RECT& rect);

 

// Operators returning CRect values

 CRect operator+(POINT point) const;

CRect operator-(POINT point) const;

CRect operator+(LPCRECT lpRect) const;

 CRect operator+(SIZE size) const;

CRect operator-(SIZE size) const;

CRect operator-(LPCRECT lpRect) const;

 CRect operator&(const RECT& rect2) const;

CRect operator|(const RECT& rect2) const;

CRect MulDiv(int nMultiplier, int nDivisor) const;

};

Copy From Baidu