class TH1Editor: public TGedFrame

TH1Editor
Editor for changing TH1 histogram attributes, rebinning & fitting.
For all possible draw options (there are a few which are not imple-
mentable in graphical user interface) see THistPainter::Paint in
root/histpainter/THistPainter.cxx

These changes can be made via the TH1Editor:
Style Tab:
'Line'     : change Line attributes (color, thickness)
see TAttLineEditor
'Fill'     : change Fill attributes (color, pattern)
see TAttFillEditor
'Title'    : TextEntry: set the title of the histogram
'Histogram': change the draw options of the histogram
'Plot' : Radiobutton: draw a 2D or 3D plot of the histogram
according to the Plot dimension there will be
different drawing possibilities (ComboBoxes/
CheckBoxes)
2d Plot:
'Error'   : ComboBox: add different error bars to the histogram
(no errors, simple, ...,  see THistPainter::Paint
'Add'     : ComboBox: further things which can be added to the
histogram (None, simple/smooth line, fill area
'Simple Drawing': CheckBox: draw a simple histogram without
errors (= "HIST" drawoption). In combination with
some other draw options an outer line is drawn on
top of the histogram
'Show markers': CheckBox: draw a marker on to of each bin (="P"
drawoption)
'Draw bar chart': CheckBox: draw a bar chart (="B" drawoption)
change the Fill Color with Fill in the Style Tab
=> will show Bar menue in the Style Tab
'Bar option': CheckBox: draw a bar chart (="BAR" drawoption)
=> will show Bar menue in the Style Tab
3d Plot:
'Type'    : ComboBox: set histogram type Lego-Plot or Surface
draw(Lego, Lego1.2, Surf, Surf1..5)
see THistPainter::Paint
'Coords'  : ComboBox: set the coordinate system (Cartesian, ..
Spheric) see THistPainter::Paint
'Error'   : see 2D plot
'Bar'     : change the bar attributes
'W' : change Bar Width
'O' : change Bar Offset
      'Percentage': specifies the percentage of the bar which is drawn
brighter and darker (10% == BAR1 drawoption)
'Horizontal Bar': draw a horizontal bar chart

'Marker'   : change the Marker attributes (color, appearance,
thickness) see TAttMarkerEditor

      This Tab has two different layouts. One is for a histogram which
is not drawn from an ntuple. The other one is available for a
histogram which is drawn from an ntuple. In this case the rebin
      algorithm can create a rebinned histogram from the original data
i.e. the ntuple.
To see te differences do:
TFile f("hsimple.root");
hpx->Draw("BAR1");        // non ntuple histogram
ntuple->Draw("px");       // ntuple histogram
Non ntuple histogram:
       'Rebin': with the Slider the number of bins (shown in the field
below the Slider) can be changed to any number which
divides the number of bins of the original histogram.
Pushing 'Apply' will delete the origin histogram and
replace it by the rebinned one on the screen
                Pushing 'Ignore' the origin histogram will be restored
Histogram drawn from an ntuple:
'Rebin'  with the slider the number of bins can be enlarged by
a factor of 2,3,4,5 (moving to the right) or reduced
by a factor of 1/2, 1/3, 1/4, 1/5
'BinOffset': with the BinOffset slider the origin of the
histogram can be changed within one binwidth
Using this slider the effect of binning the data into
bins can be made visible => statistical fluctuations
       'Axis Range': with the DoubleSlider it is possible to zoom into
the specified axis range. It is also possible to set
the upper and lower limit in fields below the slider
'Delayed drawing': all the Binning sliders can set to delay
draw mode. Then the changes on the histogram are only
updated, when the Slider is released. This should be
activated if the redrawing of the histogram is too
time consuming.