class TLegend: public TPave, public TAttText

 TPadLegend do-nothing default constructor

 TLegend normal Contructor

 A TLegend is a Pave with several TLegendEntry(s)
 The pave is defined with default coords, bordersize and option
 x1,y1,x2,y2 are the coordinates of the Legend in the current pad
 (in NDC by default!)
 text is left adjusted and vertically centered = 12
      Angle=0 (degrees), color=1 (black)
      helvetica-medium-r-normal scalable font = 42
      (will use bold = 62 for header)
      size =0 (calculate this later when number of entries is known)
 header is the "title" that will be displayed at the top of the legend
   it is treated like a regular entry and supports TLatex. The default
   is no header (header = 0).
 Options are the same as for TPave Default = "brNDC"

 Here's an example of a Legend created with TLegend

 The Legend part of this plot was created as follows:

    leg = new TLegend(0.4,0.6,0.89,0.89);
    leg->AddEntry(fun1,"One Theory","l");
    leg->AddEntry(fun3,"Another Theory","f");
    leg->AddEntry(gr,"The Data","p");
    leg->Draw();
    // oops we forgot the blue line... add it after
    leg->AddEntry(fun2,"#sqrt{2#pi} P_{T} (#gamma)  latex formula","f");
    // and add a header (or "title") for the legend
    leg->SetHeader("The Legend Title");
    leg->Draw();

 where fun1,fun2,fun3 and gr are pre-existing functions and graphs

 You can edit the TLegend by right-clicking on it.

 copy constuctor

assignment operator

 TLegend default destructor

 Add a new entry to this legend
 obj is the object to be represented
 label is the text you wish to associate with obj in the legend.
 if label is null or empty, the title of the object will be used.
 Options are:
    L draw line associated w/ TAttLine if obj inherits from TAttLine
    P draw polymarker assoc. w/ TAttMarker if obj inherits from TAttMarker
    F draw a box with fill associated w/ TAttFill if obj inherits TAttFill
    E draw vertical error bar if option "P" is also specified

 Add a new entry to this legend
 name is the name of an object in the pad to be represented
 label is the text you wish to associate with obj in the legend
 if label is null or empty, the title of the object will be used.
 Options are:
    L draw line associated w/ TAttLine if obj inherits from TAttLine
    P draw polymarker assoc. w/ TAttMarker if obj inherits from TAttMarker
    F draw a box with fill associated w/ TAttFill if obj inherits TAttFill
    E draw vertical error bar if option "P" is also specified

 Clear all entries in this legend --- including the header!

 copy this legend into obj

 Delete entry at the mouse position

 Draw this legend with its current attributes

 Edit the fill attributes for the entry pointed by the mouse

 Edit the line attributes for the entry pointed by the mouse

 Edit the marker attributes for the entry pointed by the mouse

 Edit the text attributes for the entry pointed by the mouse

 Get entry pointed to by the mouse
 This method is mostly a tool for other methods inside this class

 returns the header, which is the title that appears at the top
  of the legend

 Add a new entry before the entry at the mouse position

 Paint this legend with its current attributes

 Get the number of rows.

 Set the number of columns for the legend. The header, if set, is given
 its own row. After that, every nColumns entries are inserted into the
 same row. For example, if one calls legend.SetNColumns(2), and there
 is no header, then the first two TObjects added to the legend will be
 in the first row, the next two will appear in the second row, and so
 on.

 Paint the entries (list of primitives) for this legend

 NOTE: if we want an     Int_t mode
       it can be added later... but I understand whyaas

 dump this TLegend and its contents

  Reset TLegendEntrys pointing to obj

 Save this legend as C++ statements on output stream out
  to be used with the SaveAs .C option

 edit the label of the entry pointed to by the mouse

 edit the option of the entry pointed to by the mouse

 Sets the header, which is the "title" that appears at the top of the
  TLegend