library: libRooFit #include "RooGraphEdge.h"

# RooGraphEdge

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

## class RooGraphEdge : public TObject

| Inheritance Chart:
`TObject`
| <- | `RooGraphEdge` |

        public:

                          RooGraphEdge()
                          RooGraphEdge(RooGraphNode* n1, RooGraphNode* n2)
                          RooGraphEdge(RooGraphNode* n1, RooGraphNode* n2, TString es)
                          RooGraphEdge(const RooGraphEdge&)
                          ~RooGraphEdge()
           static TClass* Class()
                     void Connect()
                     void Connect(int color)
                     void Connect(RooGraphNode* n1, RooGraphNode* n2)
              const char* Get1stNode() const
              const char* Get2ndNode() const
            RooGraphNode* GetEnd()
                   double GetInitialDistance()
            RooGraphNode* GetStart()
                  TString GetStyle() const
                 TObject* GetType(TList* padlist)
                   double GetX1()
                   double GetX2()
                   double GetY1()
                   double GetY2()
          virtual TClass* IsA() const
            RooGraphEdge& operator=(const RooGraphEdge&)
                     void print()
                     void read(ifstream& file)
                     void Set1stNode(RooGraphNode* n1)
                     void Set2ndNode(RooGraphNode* n2)
                     void SetType(TString es)
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
             virtual void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)
                     void SwitchNodes()

### Data Members

        private:

          RooGraphNode* fn1          nodes the edge
          RooGraphNode* fn2          connects together
                TString fes
                TString ffirstnode
                TString fsecondnode

## Class Description

    RooGraphEdge:

    The edge class is a subset of the node class and an edge can only be made
    if there are two nodes to connect it to. It is used to show how the nodes
    depend on each other, and to help display the topology of the graph.  They
    are also necessary for finding the graph lenght for the springs.

RooGraphEdge()

    Default constructor for an edge

RooGraphEdge(RooGraphNode *n1, RooGraphNode *n2)

    Edge standard constructor with default edge type

RooGraphEdge(RooGraphNode *n1, RooGraphNode *n2, TString es)

    Edge standard constructor

void print()

    prints the names of the nodes the edge is connected to to the screen

void read(ifstream &file)

    gets the information needed to draw an edge from a file of a special format

void Set1stNode(RooGraphNode *n1)

    sets the first node for the edge

void Set2ndNode(RooGraphNode *n2)

    sets the second node for the edge

void Connect()

    draw the edge to the canvas in the form of either a line, or arrow

void Connect(int color)

    draws the egde to the canvas with the given color

void Connect(RooGraphNode *n1, RooGraphNode *n2)

    draws the edge to the screen with the given imput nodes

double GetInitialDistance()

    Returns the length of the edge

TObject* GetType(TList *padlist)

    returns the object that represents the edge on the canvas

double GetX1()

    returns the value for x1

double GetY1()

    returns the value for y1

double GetX2()

    returns the value for x2

double GetY2()

    returns the value for y2

void SwitchNodes()

    switches the nodes of the edge

### Inline Functions

                     void ~RooGraphEdge()
                     void SetType(TString es)
              const char* Get1stNode() const
              const char* Get2ndNode() const
                  TString GetStyle() const
            RooGraphNode* GetStart()
            RooGraphNode* GetEnd()
                  TClass* Class()
                  TClass* IsA() const
                     void ShowMembers(TMemberInspector& insp, char* parent)
                     void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)
             RooGraphEdge RooGraphEdge(const RooGraphEdge&)
            RooGraphEdge& operator=(const RooGraphEdge&)

Last update: Tue Jun 28 18:12:50 2005
Copyright (c) 2000-2005, Regents of the University of California *