library: libGui #include "TGImageMap.h"

# TGRegion

class description - source file - inheritance tree (.pdf)

## class TGRegion : public TObject

| Inheritance Chart:

`TObject`

<-

`TGRegion`

<-

`TGRegionWithId` |

        protected:

                   TGRegion(Bool_t)
          TGRegion CopyRegion() const

        public:

                          TGRegion()
                          TGRegion(Int_t x, Int_t y, UInt_t w, UInt_t h, TGRegion::ERegionType = kRectangle)
                          TGRegion(Int_t n, TPoint* points, Bool_t winding = kFALSE)
                          TGRegion(Int_t n, Int_t* x, Int_t* y, Bool_t winding = kFALSE)
                          TGRegion(const TArrayS& x, const TArrayS& y, Bool_t winding = kFALSE)
                          TGRegion(const TGRegion& reg)
                 TGRegion Unite(const TGRegion& r) const
                 TGRegion Intersect(const TGRegion& r) const
                 TGRegion Subtract(const TGRegion& r) const
                 TGRegion Eor(const TGRegion& r) const
                 TGRegion operator|(const TGRegion& r) const
                 TGRegion operator+(const TGRegion& r) const
                 TGRegion operator&(const TGRegion& r) const
                 TGRegion operator-(const TGRegion& r) const
                 TGRegion operator^(const TGRegion& r) const
                  virtual ~TGRegion()
           static TClass* Class()
                   Bool_t Contains(const TPoint& p) const
                   Bool_t Contains(Int_t x, Int_t y) const
              TGDimension GetDimension() const
               TGPosition GetPosition() const
          virtual TClass* IsA() const
                   Bool_t IsEmpty() const
                   Bool_t IsNull() const
                   Bool_t operator!=(const TGRegion& r) const
                TGRegion& operator&=(const TGRegion& r)
                TGRegion& operator+=(const TGRegion& r)
                TGRegion& operator-=(const TGRegion& r)
                TGRegion& operator=(const TGRegion& r)
                   Bool_t operator==(const TGRegion& r) const
                TGRegion& operator^=(const TGRegion& r)
                TGRegion& operator|=(const TGRegion& r)
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
             virtual void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)

### Data Members

        protected:

          TGRegionData* fData  data describing region

        public:

          static const TGRegion::ERegionType kRectangle
          static const TGRegion::ERegionType kEllipse

## Class Description

     TGImageMap (with TGRegion and TGRegionWithId help classes)

     A TGImageMap provides the functionality like a clickable image in
     a web browser with sensitive regions (MAP HTML tag).

TGRegion()

     Create a region object.

TGRegion(Bool_t is_null)

     Create empty region.

TGRegion(Int_t x, Int_t y, UInt_t w, UInt_t h, ERegionType)

     Create and initialize a region with a rectangle.

TGRegion(Int_t n, TPoint *points, Bool_t winding)

     Create and intialize a region with a polygon.

TGRegion(const TArrayS &x, const TArrayS &y, Bool_t winding)

     Create and initialize a region with an X and a Y array of points.

TGRegion(Int_t n, Int_t *x, Int_t *y, Bool_t winding)

     Create and initialize a region with an X and Y array of points.

TGRegion(const TGRegion &r) : TObject(r)

     Region copy constructor.

~TGRegion()

     Delete a region.

TGRegion CopyRegion() const

     Copy a region.

Bool_t IsNull() const

     Return true if region is not set.

Bool_t IsEmpty() const

     Return true if region is empty.

Bool_t Contains(const TPoint &p) const

     Return true if point p is contained in the region.

Bool_t Contains(Int_t x, Int_t y) const

     Return true if point (x,y) is contained in the region.

TGRegion Unite(const TGRegion &r) const

     Return the union of this region with r.

TGRegion Intersect(const TGRegion &r) const

     Returns a region which is the intersection of this region and r.

TGRegion Subtract(const TGRegion &r) const

     Returns a region which is r subtracted from this region.

TGRegion Eor(const TGRegion &r) const

     Returns a region which is the difference between the union and
     intersection this region and r.

TGDimension GetDimension() const

     Return dimension of region (widht, height).

TGPosition GetPosition() const

     Return position of region (x, y).

### Inline Functions

               TGRegion operator|(const TGRegion& r) const
               TGRegion operator+(const TGRegion& r) const
               TGRegion operator&(const TGRegion& r) const
               TGRegion operator-(const TGRegion& r) const
               TGRegion operator^(const TGRegion& r) const
              TGRegion& operator|=(const TGRegion& r)
              TGRegion& operator+=(const TGRegion& r)
              TGRegion& operator&=(const TGRegion& r)
              TGRegion& operator-=(const TGRegion& r)
              TGRegion& operator^=(const TGRegion& r)
                 Bool_t operator==(const TGRegion& r) const
                 Bool_t operator!=(const TGRegion& r) const
              TGRegion& operator=(const TGRegion& r)
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)

Author: Valeriy Onuchin & Fons Rademakers 18/10/2000
Last update: root/gui:$Name: $:$Id: TGImageMap.cxx,v 1.8 2005/06/24 20:30:12 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *