TH2Editor.cxx

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// @(#)root/ged:$Id$
// Author: Carsten Hof   09/08/04
// Authors mail: Carsten_Hof@web.de
 
/*************************************************************************
 * Copyright (C) 1995-2004, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
 
/**\class TH2Editor
    \ingroup ged
 
Editor for changing TH2 histogram attributes, rebinning & fitting.
For all possible draw options (there are a few which are not implementable
in a graphical user interface) see THistPainter::Paint.
 
These changes can be made via the TH2Editor:
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:
  'Contour' : ComboBox: draw a contour plot (None, Cont0..4)
  'Cont #'  : TGNumberEntry: set the number of Contours
2d Plot checkboxes:
  'Arrow'   : arrow mode. Shows gradient between adjacent cells
  'Col'     : a box is drawn for each cell with a color scale
              varying with contents
  'Text'    : Draw bin contents as text
  'Box'     : a box is drawn for each cell with surface
              proportional to contents
  'Scat'    : Draw a scatter-plot (default)
  'Palette' : the color palette is drawn
 
3d Plot:
  'Type'    : ComboBox: set histogram type Lego or Surface-Plot
              draw(Lego, Lego1..4, Surf, Surf1..5)
              see THistPainter::Paint
  'Coords'  : ComboBox: set the coordinate system (Cartesian, ..
              Spheric) see THistPainter::Paint
  'Cont #'  : TGNumberEntry: set the number of Contours (for e.g.
              Lego2 drawoption
3d Plot checkboxes:
  'Errors'  : draw errors in a cartesian lego plot
  'Palette' : the color palette is drawn
  'Front'   : draw the front box of a cartesian lego plot
  'Back'    : draw the back box of a cartesian lego plot
Available for a 3D lego plot:
  'Bar'     : change the bar attributes
        'W' : change Bar Width
        'O' : change Bar Offset
Further Editor:
  'Marker'   : change the Marker attributes (color, appearance,
               thickness) see TAttMarkerEditor
 
 
Rebinning Tab:
  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 for example:
     TFile f("hsimple.root");
     hpxpy->Draw("Lego2");              // non ntuple histogram
     ntuple->Draw("px:py","","Lego2");  // ntuple histogram
Non ntuple histogram:
   'Rebin': with the Sliders (one for the x, one for the y axis)
            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 sliders 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 be 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.                                       //
*/
 
 
#include "TH2Editor.h"
#include "TGedEditor.h"
#include "TGComboBox.h"
#include "TGTextEntry.h"
#include "TGLabel.h"
#include "TVirtualPad.h"
#include "TString.h"
#include "TGButtonGroup.h"
#include "TGNumberEntry.h"
#include "TG3DLine.h"
#include "TGDoubleSlider.h"
#include "TGSlider.h"
#include "TView.h"
#include "TCanvas.h"
#include "TGedPatternSelect.h"
#include "TGColorSelect.h"
#include "TColor.h"
#include "TTreePlayer.h"
#include "TSelectorDraw.h"
#include "TGTab.h"
#include "TGMsgBox.h"
#include "TH2.h"
#include "TROOT.h"
#include "TVirtualX.h"
 
 
ClassImp(TH2Editor);
 
enum ETH2Wid {
   kTH2_TITLE,
   kDIM_SIMPLE, kDIM_COMPLEX, kHIST_TYPE,
   kTYPE_LEGO,  kTYPE_LEGO1,  kTYPE_LEGO2, kTYPE_LEGO3, kTYPE_LEGO4,
   kTYPE_SURF,  kTYPE_SURF1,  kTYPE_SURF2, kTYPE_SURF3, kTYPE_SURF4, kTYPE_SURF5,
   kCOORD_TYPE, kCOORDS_CAR,  kCOORDS_CYL, kCOORDS_POL, kCOORDS_PSR, kCOORDS_SPH,
   kCONT_TYPE,  kERROR_ONOFF, kPALETTE_ONOFF, kPALETTE_ONOFF1,
   kARROW_ONOFF,kBOX_ONOFF,   kSCAT_ONOFF, kCOL_ONOFF, kTEXT_ONOFF,
   kFRONTBOX_ONOFF, kBACKBOX_ONOFF,
   kBAR_WIDTH,   kBAR_OFFSET,
   kCONT_NONE,   kCONT_0, kCONT_1, kCONT_2, kCONT_3, kCONT_4,
   kCONT_LEVELS, kCONT_LEVELS1,
   kSLIDERX_MIN, kSLIDERX_MAX, kSLIDERY_MIN, kSLIDERY_MAX,
   kDELAYED_DRAWING, kCOLOR,  kPATTERN,
   kBINXSLIDER, kBINYSLIDER, kBINXSLIDER1, kBINYSLIDER1,
   kXBINOFFSET, kYBINOFFSET
};
 
////////////////////////////////////////////////////////////////////////////////
/// Constructor of histogram attribute GUI.
 
TH2Editor::TH2Editor(const TGWindow *p, Int_t width,
                     Int_t height, UInt_t options, Pixel_t back)
   : TGedFrame(p, width, height, options | kVerticalFrame, back),
     fHist(0),
     fBin(0),
     fBinHist(0)
{
   MakeTitle("Title");
 
   // Histogram title
   fTitlePrec = 2;
   fTitle = new TGTextEntry(this, new TGTextBuffer(50), kTH2_TITLE);
   fTitle->Resize(135, fTitle->GetDefaultHeight());
   fTitle->SetToolTipText("Enter the histogram title string");
   AddFrame(fTitle, new TGLayoutHints(kLHintsLeft, 3, 1, 2, 5));
 
 
   // 2D or 3D Plot?
   TGCompositeFrame *f2 = new TGCompositeFrame(this, 80, 20, kHorizontalFrame);
   fDimGroup = new TGHButtonGroup(f2,"Plot");
   fDim = new TGRadioButton(fDimGroup,"2-D",kDIM_SIMPLE);
   fDim->SetToolTipText("A 2-d plot of the histogram is dawn");
   fDim0 = new TGRadioButton(fDimGroup,"3-D",kDIM_COMPLEX);
   fDim0->SetToolTipText("A 3-d plot of the histogram is dawn");
   fDimGroup->SetLayoutHints(fDimlh=new TGLayoutHints(kLHintsLeft ,-2,3,3,-7),fDim);
   fDimGroup->SetLayoutHints(fDim0lh=new TGLayoutHints(kLHintsLeft ,16,-1,3,-7),fDim0);
   fDimGroup->Show();
   fDimGroup->ChangeOptions(kFitWidth|kChildFrame|kHorizontalFrame);
   f2->AddFrame(fDimGroup, new TGLayoutHints(kLHintsTop, 4, 1, 0, 0));
   AddFrame(f2, new TGLayoutHints(kLHintsTop, 1, 1, 2, 5));
 
   // 2D Plot drawoptions
   f6 = new TGCompositeFrame(this, 80, 20, kHorizontalFrame);
   AddFrame(f6, new TGLayoutHints(kLHintsTop, 3, 1, 4, 2));
 
   TGCompositeFrame *f7 = new TGCompositeFrame(f6, 40, 20);
   f6->AddFrame(f7, new TGLayoutHints(kLHintsLeft, 1, 1, 0, 0));
 
   TGLabel *fAddLabel = new TGLabel(f7, "Contour:");
   f7->AddFrame(fAddLabel, new TGLayoutHints(kLHintsLeft, 6, 4, 4, 4));
 
   fColContLbl = new TGLabel(f7, "Cont #:");
   f7->AddFrame(fColContLbl, new TGLayoutHints( kLHintsLeft, 6, 4, 4, 4));
 
   fAddArr = new TGCheckButton(f7, "Arrow", kARROW_ONOFF);
   fAddArr ->SetToolTipText("Shows gradient between adjacent cells");
   f7->AddFrame(fAddArr, new TGLayoutHints(kLHintsLeft, 6, 1, 2, 0));
 
   fAddCol = new TGCheckButton(f7, "Col", kCOL_ONOFF);
   fAddCol ->SetToolTipText("A box is drawn for each cell with a color scale varying with contents");
   f7->AddFrame(fAddCol, new TGLayoutHints(kLHintsLeft, 6, 1, 1, 0));
 
   fAddText = new TGCheckButton(f7, "Text", kTEXT_ONOFF);
   fAddText ->SetToolTipText("Draw bin contents as text");
   f7->AddFrame(fAddText, new TGLayoutHints(kLHintsLeft, 6, 1, 1, 3));
 
   TGCompositeFrame *f8 = new TGCompositeFrame(f6, 40, 20, kVerticalFrame);
   f6->AddFrame(f8, new TGLayoutHints(kLHintsLeft, 5, 1, 0, 0));
 
   fContCombo = BuildHistContComboBox(f8, kCONT_TYPE);
   f8->AddFrame(fContCombo, new TGLayoutHints(kLHintsLeft, 6, 1, 2, 1));
   fContCombo->Resize(61, 20);
   fContCombo->Associate(this);
 
   fContLevels = new TGNumberEntry(f8, 20, 0, kCONT_LEVELS,
                                   TGNumberFormat::kNESInteger,
                                   TGNumberFormat::kNEANonNegative,
                                   TGNumberFormat::kNELLimitMinMax, 1, 99);
   f8->AddFrame(fContLevels, new TGLayoutHints(kLHintsLeft, 6, 1, 3, 1));
   fContLevels->GetNumberEntry()->SetToolTipText("Set number of contours (1..99)");
   fContLevels->Resize(60,20);
 
   fAddBox = new TGCheckButton(f8, "Box", kBOX_ONOFF);
   fAddBox ->SetToolTipText("A box is drawn for each cell with surface proportional to contents");
   f8->AddFrame(fAddBox, new TGLayoutHints(kLHintsLeft, 6, 1, 3, 0));
 
   fAddScat = new TGCheckButton(f8, "Scat", kSCAT_ONOFF);
   fAddScat ->SetToolTipText("Draw a scatter-plot");
   f8->AddFrame(fAddScat, new TGLayoutHints(kLHintsLeft, 6, 1, 1, 0));
 
   fAddPalette = new TGCheckButton(f8, "Palette", kPALETTE_ONOFF);
   fAddPalette ->SetToolTipText("Add color palette beside the histogram");
   f8->AddFrame(fAddPalette, new TGLayoutHints(kLHintsLeft, 6, 1, 1, 0));
 
   f9 = new TGCompositeFrame(this, 80, 20, kHorizontalFrame);
   AddFrame(f9, new TGLayoutHints(kLHintsTop, 3, 1, 2, 0));
 
   TGCompositeFrame *f10 = new TGCompositeFrame(f9, 40, 20);
   f9->AddFrame(f10, new TGLayoutHints(kLHintsLeft, 0, 0, 3, 0));
 
   TGLabel *fType = new TGLabel(f10, "Type:");
   f10->AddFrame(fType, new TGLayoutHints(kLHintsNormal, 1, 1, 1, 1));
 
   TGLabel *fCoords = new TGLabel(f10, "Coords:");
   f10->AddFrame(fCoords, new TGLayoutHints(kLHintsLeft, 1, 1, 5, 1));
 
   fColContLbl1 = new TGLabel(f10, "Cont #:");
   f10->AddFrame(fColContLbl1, new TGLayoutHints( kLHintsLeft, 1, 1, 5, 3));
 
   fAddFB = new TGCheckButton(f10, "Front", kFRONTBOX_ONOFF);
   fAddFB ->SetToolTipText("Supress the drawing of the front box");
   f10->AddFrame(fAddFB, new TGLayoutHints(kLHintsLeft, 0, 1, 6, 0));
   fAddBB = new TGCheckButton(f10, "Back", kBACKBOX_ONOFF);
   fAddBB ->SetToolTipText("Supress the drawing of the back box");
   f10->AddFrame(fAddBB, new TGLayoutHints(kLHintsLeft, 0, 1, 3, 0));
 
   TGCompositeFrame *f11 = new TGCompositeFrame(f9, 40, 20);
   f9->AddFrame(f11, new TGLayoutHints(kLHintsLeft, 5, 1, 0, 0));
 
   fTypeCombo = BuildHistTypeComboBox(f11, kHIST_TYPE);
   f11->AddFrame(fTypeCombo, new TGLayoutHints(kLHintsLeft, 0, 1, 2, 1));
   fTypeCombo->Resize(80, 20);
   fTypeCombo->Associate(this);
 
   fCoordsCombo = BuildHistCoordsComboBox(f11, kCOORD_TYPE);
   f11->AddFrame(fCoordsCombo, new TGLayoutHints(kLHintsLeft, 0, 1, 2, 1));
   fCoordsCombo->Resize(80, 20);
   fCoordsCombo->Associate(this);
 
   fContLevels1 = new TGNumberEntry(f11, 20, 0, kCONT_LEVELS1,
                                    TGNumberFormat::kNESInteger,
                                    TGNumberFormat::kNEANonNegative,
                                    TGNumberFormat::kNELLimitMinMax, 1, 99);
   fContLevels1->GetNumberEntry()->SetToolTipText("Set number of contours (1..99)");
   fContLevels1->Resize(78,20);
   f11->AddFrame(fContLevels1, new TGLayoutHints(kLHintsLeft, 0, 1, 2, 1));
 
   fAddError = new TGCheckButton(f11, "Errors", kERROR_ONOFF);
   fAddError ->SetToolTipText("Add color palette beside the histogram");
   f11->AddFrame(fAddError, new TGLayoutHints(kLHintsLeft, 0, 1, 4, 0));
   fAddPalette1 = new TGCheckButton(f11, "Palette", kPALETTE_ONOFF1);
   fAddPalette1 ->SetToolTipText("Add color palette beside the histogram");
   f11->AddFrame(fAddPalette1, new TGLayoutHints(kLHintsLeft, 0, 1, 3, 0));
 
 
   // Bin bar settings
   f12 = new TGCompositeFrame(this, 145, 10, kHorizontalFrame |
                                             kFitWidth        |
                                             kFixedWidth      |
                                             kOwnBackground);
   f12->AddFrame(new TGLabel(f12,"Bar"),
                 new TGLayoutHints(kLHintsLeft, 1, 1, 0, 0));
   f12->AddFrame(new TGHorizontal3DLine(f12),
                 new TGLayoutHints(kLHintsExpandX, 5, 5, 7, 7));
   AddFrame(f12, new TGLayoutHints(kLHintsTop,0,0,6,4));
 
   f13 = new TGCompositeFrame(this, 80, 20, kHorizontalFrame);
   TGLabel *fWidthLbl = new TGLabel(f13, "W:");
   f13->AddFrame(fWidthLbl, new TGLayoutHints( kLHintsLeft, 1, 3, 4, 1));
   fBarWidth = new TGNumberEntry(f13, 1.00, 6, kBAR_WIDTH,
                                 TGNumberFormat::kNESRealTwo,
                                 TGNumberFormat::kNEANonNegative,
                                 TGNumberFormat::kNELLimitMinMax, 0.01, 1.);
   fBarWidth->GetNumberEntry()->SetToolTipText("Set bar chart width");
   fBarWidth->Resize(45,20);
   f13->AddFrame(fBarWidth, new TGLayoutHints(kLHintsLeft, 1, 1, 2, 1));
 
   TGLabel *fOffsetLbl = new TGLabel(f13, "O:");
   f13->AddFrame(fOffsetLbl, new TGLayoutHints(kLHintsLeft, 6,3, 4, 1));
   fBarOffset = new TGNumberEntry(f13, 0.00, 5, kBAR_OFFSET,
                                  TGNumberFormat::kNESRealTwo,
                                  TGNumberFormat::kNEAAnyNumber,
                                  TGNumberFormat::kNELLimitMinMax, -1., 1.);
   fBarOffset->GetNumberEntry()->SetToolTipText("Set bar chart offset");
   fBarOffset->Resize(50,20);
   f13->AddFrame(fBarOffset, new TGLayoutHints(kLHintsLeft, 1, 1, 2, 1));
   AddFrame(f13, new TGLayoutHints(kLHintsTop, 1, 1, 0, 4));
 
 
   // Set the color and pattern of the Frame (only for Cartesian 3D plot).
   f38 = new TGCompositeFrame(this, 80, 20, kVerticalFrame);
   TGCompositeFrame *f39 = new TGCompositeFrame(f38, 145, 10, kHorizontalFrame |
                                                              kFitWidth        |
                                                              kFixedWidth      |
                                                              kOwnBackground);
   f39->AddFrame(new TGLabel(f39,"Frame Fill"),
                 new TGLayoutHints(kLHintsLeft, 1, 1, 0, 0));
   f39->AddFrame(new TGHorizontal3DLine(f39),
                 new TGLayoutHints(kLHintsExpandX, 5, 5, 7, 7));
   f38->AddFrame(f39, new TGLayoutHints(kLHintsTop,0,0,6,1));
 
   TGCompositeFrame *f21 = new TGCompositeFrame(f38, 80, 20, kHorizontalFrame);
   fFrameColor = new TGColorSelect(f21, 0, kCOLOR);
   f21->AddFrame(fFrameColor, new TGLayoutHints(kLHintsLeft, 1, 1, 1, 0));
   fFrameColor->Associate(f38);
   fFramePattern = new TGedPatternSelect(f21, 1, kPATTERN);
   f21->AddFrame(fFramePattern, new TGLayoutHints(kLHintsLeft, 1, 1, 1, 0));
   fFramePattern->Associate(f38);
   f38->AddFrame(f21, new TGLayoutHints(kLHintsTop, 1, 1, 0, 0));
   AddFrame(f38, new TGLayoutHints(kLHintsTop));
 
   fCutString = "";
 
   CreateBinTab();
 
   // add itself in the least of cleanups to be notified when attached histogram is deleted
   gROOT->GetListOfCleanups()->Add(this);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create the Binning tab.
 
void TH2Editor::CreateBinTab()
{
   fBin = CreateEditorTabSubFrame("Binning");
 
   // Editor for rebinning a histogram which does NOT derive from an Ntuple
   fBinXCont = new TGCompositeFrame(fBin, 80, 20, kVerticalFrame);
   TGCompositeFrame *title1 = new TGCompositeFrame(fBinXCont, 145, 10,
                                                              kHorizontalFrame |
                                                              kFitWidth        |
                                                              kFixedWidth      |
                                                              kOwnBackground);
   title1->AddFrame(new TGLabel(title1, "Rebin"),
                    new TGLayoutHints(kLHintsLeft, 1, 1, 0, 0));
   title1->AddFrame(new TGHorizontal3DLine(title1),
                    new TGLayoutHints(kLHintsExpandX, 5, 5, 7, 7));
   fBinXCont->AddFrame(title1, new TGLayoutHints(kLHintsTop, 0, 0, 2, 0));
 
   TGCompositeFrame *f22 = new TGCompositeFrame(fBinXCont, 80, 20,
                                                           kHorizontalFrame);
   TGLabel *binSliderXLbl = new TGLabel(f22,"x:");
   f22->AddFrame(binSliderXLbl,
                 new TGLayoutHints(kLHintsCenterY | kLHintsLeft, 4,0, 4, 1));
   fBinXSlider  = new TGHSlider(f22, 100, kSlider1 | kScaleBoth);
   fBinXSlider->Resize(107,20);
   f22->AddFrame(fBinXSlider, new TGLayoutHints(kLHintsLeft, 2,0,0,3));
   fBinXCont->AddFrame(f22, new TGLayoutHints(kLHintsTop, 3, 7, 3, 5));
 
   TGCompositeFrame *f23 = new TGCompositeFrame(fBinXCont, 80, 20,
                                                kHorizontalFrame);
   TGLabel *binXLabel1 = new TGLabel(f23, "# of Bins:");
   f23->AddFrame(binXLabel1, new TGLayoutHints(kLHintsLeft, 20, 1, 2, 1));
   fBinXNumberEntry = new TGNumberEntryField(f23, kBINXSLIDER, 0.0,
                                             TGNumberFormat::kNESInteger);
   ((TGTextEntry*)fBinXNumberEntry)->SetToolTipText("Set the number of x axis bins in the rebinned histogram");
   fBinXNumberEntry->Resize(57,20);
   f23->AddFrame(fBinXNumberEntry, new TGLayoutHints(kLHintsRight, 8, 0, 0, 0));
   fBinXCont->AddFrame(f23, new TGLayoutHints(kLHintsTop, 0, 7, 3, 4));
 
   TGCompositeFrame *f37 = new TGCompositeFrame(fBinXCont, 80, 20,
                                                           kHorizontalFrame);
   TGLabel *binSliderYLbl = new TGLabel(f37,"y:");
   f37->AddFrame(binSliderYLbl,
                 new TGLayoutHints(kLHintsCenterY | kLHintsLeft, 4,0, 4, 1));
   fBinYSlider  = new TGHSlider(f37, 100, kSlider1 | kScaleBoth);
   fBinYSlider->Resize(107,20);
   f37->AddFrame(fBinYSlider, new TGLayoutHints(kLHintsLeft, 1,0,0,3));
   fBinXCont->AddFrame(f37, new TGLayoutHints(kLHintsTop, 3, 7, 3, 5));
 
   TGCompositeFrame *f36 = new TGCompositeFrame(fBinXCont, 80, 20,
                                                           kHorizontalFrame);
   TGLabel *binYLabel1 = new TGLabel(f36, "# of Bins:");
   f36->AddFrame(binYLabel1, new TGLayoutHints(kLHintsLeft, 20, 1, 2, 1));
   fBinYNumberEntry = new TGNumberEntryField(f36, kBINYSLIDER, 0.0,
                                             TGNumberFormat::kNESInteger);
   ((TGTextEntry*)fBinYNumberEntry)->SetToolTipText("Set the number of y axis bins in the rebinned histogram");
   fBinYNumberEntry->Resize(57,20);
   f36->AddFrame(fBinYNumberEntry, new TGLayoutHints(kLHintsRight, 8, 0, 0, 0));
   fBinXCont->AddFrame(f36, new TGLayoutHints(kLHintsTop, 0, 7, 3, 4));
 
   // Text buttons Apply & Ignore for rebinned histogram shown on the screen.
   TGCompositeFrame *f24 = new TGCompositeFrame(fBinXCont, 118, 20,
                                                           kHorizontalFrame |
                                                           kFixedWidth);
   fApply = new TGTextButton(f24, " &Apply ");
   f24->AddFrame(fApply,
                 new TGLayoutHints(kLHintsExpandX | kLHintsLeft ,0, 3, 4, 4));
   fCancel = new TGTextButton(f24, " &Ignore ");
   f24->AddFrame(fCancel,
                 new TGLayoutHints(kLHintsExpandX | kLHintsLeft, 3, 0, 4, 4));
   fBinXCont->AddFrame(f24, new TGLayoutHints(kLHintsTop, 20, 3, 3, 4));
   fBin->AddFrame(fBinXCont,new TGLayoutHints(kLHintsTop));
 
   // Widgets for rebinning a histogram which derives from an Ntuple
 
   fBinXCont1 = new TGCompositeFrame(fBin, 80, 20, kVerticalFrame);
   TGCompositeFrame *title2 = new TGCompositeFrame(fBinXCont1, 145, 10,
                                                               kHorizontalFrame |
                                                               kFitWidth        |
                                                               kFixedWidth      |
                                                               kOwnBackground);
   title2->AddFrame(new TGLabel(title2, "X-Axis"),
                    new TGLayoutHints(kLHintsLeft, 1, 1, 0, 0));
   title2->AddFrame(new TGHorizontal3DLine(title2),
                    new TGLayoutHints(kLHintsExpandX, 5, 5, 7, 7));
   fBinXCont1->AddFrame(title2, new TGLayoutHints(kLHintsTop, 0, 0, 2, 0));
 
   TGCompositeFrame *f26 = new TGCompositeFrame(fBinXCont1, 80, 20,
                                                            kHorizontalFrame);
   fBinXSlider1  = new TGHSlider(f26, 100, kSlider1 | kScaleBoth);
   fBinXSlider1->Resize(120,20);
   fBinXSlider1->SetRange(1,9);
   fBinXSlider1->SetScale(14);
   fBinXSlider1->SetPosition(5);
   f26->AddFrame(fBinXSlider1, new TGLayoutHints(kLHintsLeft, 2,0,0,0));
   fBinXCont1->AddFrame(f26, new TGLayoutHints(kLHintsTop, 3, 7, 3, 0));
 
   // Lettering of the Rebin Slider
   TGCompositeFrame *f27 = new TGCompositeFrame(fBinXCont1, 80, 20,
                                                            kHorizontalFrame);
   TGLabel *l1 = new TGLabel(f27, "-5");
   f27->AddFrame(l1, new TGLayoutHints(kLHintsLeft, 5, 1, -1, 0));
   TGLabel *l2 = new TGLabel(f27, "-2");
   f27->AddFrame(l2, new TGLayoutHints(kLHintsLeft, 31, 2, -1, 0));
   TGLabel *l3 = new TGLabel(f27, "2");
   f27->AddFrame(l3, new TGLayoutHints(kLHintsLeft, 21, 2, -1, 0));
   TGLabel *l4 = new TGLabel(f27, "5");
   f27->AddFrame(l4, new TGLayoutHints(kLHintsLeft, 36, 3, -1, 0));
   fBinXCont1->AddFrame(f27, new TGLayoutHints(kLHintsTop, 0, 0, 0, 0));
 
   TGCompositeFrame *f28 = new TGCompositeFrame(fBinXCont1, 140, 20,
                                                            kHorizontalFrame);
   TGLabel *binXLabel2 = new TGLabel(f28, "# of Bins:");
   f28->AddFrame(binXLabel2, new TGLayoutHints(kLHintsLeft, 8, 1, 4, 1));
 
   fBinXNumberEntry1 = new TGNumberEntryField(f28, kBINXSLIDER1, 0.0,
                                              TGNumberFormat::kNESInteger);
   ((TGTextEntry*)fBinXNumberEntry1)->SetToolTipText("Set the number of x axis bins in the rebinned histogram");
   fBinXNumberEntry1->Resize(57,20);
   f28->AddFrame(fBinXNumberEntry1,
                 new TGLayoutHints(kLHintsLeft, 21, 0, 2, 0));
   fBinXCont1->AddFrame(f28, new TGLayoutHints(kLHintsTop, 0, 7, 2, 4));
 
   TGCompositeFrame *f29 = new TGCompositeFrame(fBinXCont1, 80, 20,
                                                kHorizontalFrame);
   TGLabel *xOffsetLbl = new TGLabel(f29, "BinOffset:");
   f29->AddFrame(xOffsetLbl, new TGLayoutHints(kLHintsLeft, 7, 1, 2, 1));
   fXOffsetNumberEntry = new TGNumberEntryField(f29, kXBINOFFSET, 0.0,
                                                TGNumberFormat::kNESRealFour,
                                                TGNumberFormat::kNEAAnyNumber,
                                                TGNumberFormat::kNELLimitMinMax,
                                                0., 1.);
   ((TGTextEntry*)fXOffsetNumberEntry)->SetToolTipText("Add an x-offset to the origin of the histogram");
   fXOffsetNumberEntry->Resize(57,20);
   f29->AddFrame(fXOffsetNumberEntry,
                 new TGLayoutHints(kLHintsRight, 21, 0, 0, 0));
   fBinXCont1->AddFrame(f29, new TGLayoutHints(kLHintsTop, 0, 7, 3, 1));
 
   TGCompositeFrame *f30 = new TGCompositeFrame(fBinXCont1, 80, 20,
                                                            kHorizontalFrame);
   fXBinOffsetSld  = new TGHSlider(f30, 100, kSlider1 | kScaleBoth);
   fXBinOffsetSld->Resize(120,20);
   f30->AddFrame(fXBinOffsetSld, new TGLayoutHints(kLHintsLeft, 2,0,0,0));
   fBinXCont1->AddFrame(f30, new TGLayoutHints(kLHintsTop, 3, 7, 3, 3));
   fBin->AddFrame(fBinXCont1, new TGLayoutHints(kLHintsTop));
 
   // Same for Y-Axis:
   // Widgets for rebinning a histogram which derives from an Ntuple
 
   fBinYCont1 = new TGCompositeFrame(fBin, 80, 20, kVerticalFrame);
   TGCompositeFrame *title3 = new TGCompositeFrame(fBinYCont1, 145, 10,
                                                               kHorizontalFrame |
                                                               kFitWidth        |
                                                               kFixedWidth      |
                                                               kOwnBackground);
   title3->AddFrame(new TGLabel(title3, "Y-Axis"),
                    new TGLayoutHints(kLHintsLeft, 1, 1, 0, 0));
   title3->AddFrame(new TGHorizontal3DLine(title3),
                    new TGLayoutHints(kLHintsExpandX, 5, 5, 7, 7));
   fBinYCont1->AddFrame(title3, new TGLayoutHints(kLHintsTop, 0, 0, 7, 0));
 
   TGCompositeFrame *f31 = new TGCompositeFrame(fBinYCont1, 80, 20,
                                                            kHorizontalFrame);
   fBinYSlider1  = new TGHSlider(f31, 100, kSlider1 | kScaleBoth);
   fBinYSlider1->Resize(120,20);
   fBinYSlider1->SetRange(1,9);
   fBinYSlider1->SetScale(14);
   fBinYSlider1->SetPosition(5);
   f31->AddFrame(fBinYSlider1, new TGLayoutHints(kLHintsLeft, 2,0,0,0));
   fBinYCont1->AddFrame(f31, new TGLayoutHints(kLHintsTop, 3, 7, 3, 0));
 
   //  Lettering of the Rebin Slider
   TGCompositeFrame *f32 = new TGCompositeFrame(fBinYCont1, 80, 20,
                                                            kHorizontalFrame);
   TGLabel *l5 = new TGLabel(f32, "-5");
   f32->AddFrame(l5, new TGLayoutHints(kLHintsLeft, 5, 1, -1, 0));
   TGLabel *l6 = new TGLabel(f32, "-2");
   f32->AddFrame(l6, new TGLayoutHints(kLHintsLeft, 31, 2, -1, 0));
   TGLabel *l7 = new TGLabel(f32, "2");
   f32->AddFrame(l7, new TGLayoutHints(kLHintsLeft, 21, 2, -1, 0));
   TGLabel *l8 = new TGLabel(f32, "5");
   f32->AddFrame(l8, new TGLayoutHints(kLHintsLeft, 36, 3, -1, 0));
   fBinYCont1->AddFrame(f32, new TGLayoutHints(kLHintsTop, 0, 0, 0, 0));
 
   TGCompositeFrame *f33 = new TGCompositeFrame(fBinYCont1, 140, 20,
                                                            kHorizontalFrame);
   TGLabel *binYLabel2 = new TGLabel(f33, "# of Bins:");
   f33->AddFrame(binYLabel2, new TGLayoutHints(kLHintsLeft, 8, 1, 4, 1));
 
   fBinYNumberEntry1 = new TGNumberEntryField(f33, kBINYSLIDER1, 0.0,
                                              TGNumberFormat::kNESInteger);
   ((TGTextEntry*)fBinYNumberEntry1)->SetToolTipText("Set the number of Y axis bins in the rebinned histogram");
   fBinYNumberEntry1->Resize(57,20);
   f33->AddFrame(fBinYNumberEntry1,
                 new TGLayoutHints(kLHintsLeft, 21, 0, 2, 0));
   fBinYCont1->AddFrame(f33, new TGLayoutHints(kLHintsTop, 0, 7, 2, 4));
 
   TGCompositeFrame *f34 = new TGCompositeFrame(fBinYCont1, 80, 20,
                                                            kHorizontalFrame);
   TGLabel *yOffsetLbl = new TGLabel(f34, "BinOffset:");
   f34->AddFrame(yOffsetLbl, new TGLayoutHints(kLHintsLeft, 7, 1, 2, 1));
   fYOffsetNumberEntry = new TGNumberEntryField(f34, kYBINOFFSET, 0.0,
                                                TGNumberFormat::kNESRealFour,
                                                TGNumberFormat::kNEAAnyNumber,
                                                TGNumberFormat::kNELLimitMinMax,
                                                0., 1.);
   ((TGTextEntry*)fYOffsetNumberEntry)->SetToolTipText("Add an Y-offset to the origin of the histogram");
   fYOffsetNumberEntry->Resize(57,20);
   f34->AddFrame(fYOffsetNumberEntry,
                 new TGLayoutHints(kLHintsRight, 21, 0, 0, 0));
   fBinYCont1->AddFrame(f34, new TGLayoutHints(kLHintsTop, 0, 7, 3, 1));
 
   TGCompositeFrame *f35 = new TGCompositeFrame(fBinYCont1, 80, 20,
                                                            kHorizontalFrame);
   fYBinOffsetSld  = new TGHSlider(f35, 100, kSlider1 | kScaleBoth);
   fYBinOffsetSld->Resize(120,20);
   fYBinOffsetSld->Associate(f35);
   f35->AddFrame(fYBinOffsetSld, new TGLayoutHints(kLHintsLeft, 2,0,0,0));
   fBinYCont1->AddFrame(f35, new TGLayoutHints(kLHintsTop, 3, 7, 3, 3));
   fBin->AddFrame(fBinYCont1, new TGLayoutHints(kLHintsTop));
 
   // Axis ranges
   TGCompositeFrame *title4 = new TGCompositeFrame(fBin, 145, 10,
                                                         kHorizontalFrame |
                                                         kFitWidth        |
                                                         kFixedWidth      |
                                                         kOwnBackground);
   title4->AddFrame(new TGLabel(title4, "Axis Range"),
                    new TGLayoutHints(kLHintsLeft, 1, 1, 0, 0));
   title4->AddFrame(new TGHorizontal3DLine(title4),
                    new TGLayoutHints(kLHintsExpandX, 5, 5, 7, 7));
   fBin->AddFrame(title4, new TGLayoutHints(kLHintsTop, 0, 0, 5, 0));
 
   TGCompositeFrame *f14 = new TGCompositeFrame(fBin, 80, 20, kHorizontalFrame);
   TGLabel *fSliderXLbl = new TGLabel(f14,"x:");
   f14->AddFrame(fSliderXLbl,
                 new TGLayoutHints(kLHintsCenterY | kLHintsLeft, 4,3, 2, 1));
   fSliderX = new TGDoubleHSlider(f14, 1, 2);
   fSliderX->Resize(119,20);
   f14->AddFrame(fSliderX, new TGLayoutHints(kLHintsLeft));
   fBin->AddFrame(f14, new TGLayoutHints(kLHintsTop, 3, 7, 4, 1));
 
   TGCompositeFrame *f17 = new TGCompositeFrame(fBin, 80, 20, kHorizontalFrame);
   fSldXMin = new TGNumberEntryField(f17, kSLIDERX_MIN, 0.0,
                                     TGNumberFormat::kNESRealTwo,
                                     TGNumberFormat::kNEAAnyNumber);
   ((TGTextEntry*)fSldXMin)->SetToolTipText("Set the minimum value of the x-axis");
   fSldXMin->Resize(57,20);
   f17->AddFrame(fSldXMin, new TGLayoutHints(kLHintsLeft, 0, 0, 0, 0));
   fSldXMax = new TGNumberEntryField(f17, kSLIDERX_MAX, 0.0,
                                     TGNumberFormat::kNESRealTwo,
                                     TGNumberFormat::kNEAAnyNumber);
   ((TGTextEntry*)fSldXMax)->SetToolTipText("Set the maximum value of the x-axis");
   fSldXMax->Resize(57,20);
   f17->AddFrame(fSldXMax, new TGLayoutHints(kLHintsLeft, 4, 0, 0, 0));
   fBin->AddFrame(f17, new TGLayoutHints(kLHintsTop, 20, 3, 5, 0));
 
   TGCompositeFrame *f15 = new TGCompositeFrame(fBin, 80, 20, kHorizontalFrame);
   TGLabel *fSliderYLbl = new TGLabel(f15,"y:");
   f15->AddFrame(fSliderYLbl,
                 new TGLayoutHints(kLHintsCenterY | kLHintsLeft, 4,2, 4, 1));
   fSliderY = new TGDoubleHSlider(f15, 1, 2);
   fSliderY->Resize(119,20);
   f15->AddFrame(fSliderY, new TGLayoutHints(kLHintsLeft));
   fBin->AddFrame(f15, new TGLayoutHints(kLHintsTop, 3, 7, 4, 1));
 
   TGCompositeFrame *f18 = new TGCompositeFrame(fBin, 80, 20, kHorizontalFrame);
   fSldYMin = new TGNumberEntryField(f18, kSLIDERY_MIN, 0.0,
                                     TGNumberFormat::kNESRealTwo,
                                     TGNumberFormat::kNEAAnyNumber);
   ((TGTextEntry*)fSldYMin)->SetToolTipText("Set the minimum value of the y-axis");
   fSldYMin->Resize(57,20);
   f18->AddFrame(fSldYMin, new TGLayoutHints(kLHintsLeft, 0, 0, 0, 0));
   fSldYMax = new TGNumberEntryField(f18, kSLIDERY_MAX, 0.0,
                                     TGNumberFormat::kNESRealTwo,
                                     TGNumberFormat::kNEAAnyNumber);
   ((TGTextEntry*)fSldYMax)->SetToolTipText("Set the maximum value of the y-axis");
   fSldYMax->Resize(57,20);
   f18->AddFrame(fSldYMax, new TGLayoutHints(kLHintsLeft, 4, 0, 0, 0));
   fBin->AddFrame(f18, new TGLayoutHints(kLHintsTop, 20, 3, 5, 0));
 
   TGCompositeFrame *f20 = new TGCompositeFrame(fBin, 80, 20, kVerticalFrame);
   fDelaydraw = new TGCheckButton(f20, "Delayed drawing", kDELAYED_DRAWING);
   fDelaydraw ->SetToolTipText("Draw the new axis range when the Slider is released");
   f20->AddFrame(fDelaydraw, new TGLayoutHints(kLHintsLeft, 6, 1, 1, 0));
   fBin->AddFrame(f20, new TGLayoutHints(kLHintsTop, 2, 1, 5, 3));
 
   fXBinOffsetSld->SetRange(0,100);
   fXBinOffsetSld->SetPosition(0);
   fXOffsetNumberEntry->SetNumber(0.0000);
 
   fYBinOffsetSld->SetRange(0,100);
   fYBinOffsetSld->SetPosition(0);
   fYOffsetNumberEntry->SetNumber(0.0000);
 
   fCancel->SetState(kButtonDisabled);
   fApply->SetState(kButtonDisabled);
 
}
 
////////////////////////////////////////////////////////////////////////////////
/// Destructor.
 
TH2Editor::~TH2Editor()
{
   // remove itselef from the list of cleanups
   gROOT->GetListOfCleanups()->Remove(this);
 
   // children of TGButonGroup are not deleted
   delete fDim;
   delete fDim0;
   delete fDimlh;
   delete fDim0lh;
 
   if (fBinHist) delete fBinHist;
   fBinHist = 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Connect signals to slots.
 
void TH2Editor::ConnectSignals2Slots()
{
   fTitle->Connect("TextChanged(const char *)", "TH2Editor", this, "DoTitle(const char *)");
   fDimGroup->Connect("Clicked(Int_t)","TH2Editor",this,"DoHistView()");
   fTypeCombo->Connect("Selected(Int_t)", "TH2Editor", this, "DoHistChanges()");
   fCoordsCombo->Connect("Selected(Int_t)", "TH2Editor", this, "DoHistChanges()");
   fContCombo->Connect("Selected(Int_t)", "TH2Editor", this, "DoHistChanges()");
   fAddArr->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddArr(Bool_t)");
   fAddBox->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddBox(Bool_t)");
   fAddCol->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddCol(Bool_t)");
   fAddScat->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddScat(Bool_t)");
   fAddText->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddText(Bool_t)");
   fAddError->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddError(Bool_t)");
   fAddPalette->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddPalette(Bool_t)");
   fAddPalette1->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddPalette(Bool_t)");
   fAddFB->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddFB()");
   fAddBB->Connect("Toggled(Bool_t)", "TH2Editor", this, "DoAddBB()");
   fContLevels->Connect("ValueSet(Long_t)", "TH2Editor", this, "DoContLevel()");
   (fContLevels->GetNumberEntry())->Connect("ReturnPressed()", "TH2Editor",
                                             this,"DoContLevel()");
   fContLevels1->Connect("ValueSet(Long_t)", "TH2Editor", this, "DoContLevel1()");
   (fContLevels1->GetNumberEntry())->Connect("ReturnPressed()", "TH2Editor",
                                             this,"DoContLevel1()");
   fBarWidth->Connect("ValueSet(Long_t)", "TH2Editor", this, "DoBarWidth()");
   (fBarWidth->GetNumberEntry())->Connect("ReturnPressed()", "TH2Editor",
                                           this, "DoBarWidth()");
   fBarOffset->Connect("ValueSet(Long_t)", "TH2Editor", this, "DoBarOffset()");
   (fBarOffset->GetNumberEntry())->Connect("ReturnPressed()", "TH2Editor",
                                           this, "DoBarOffset()");
   fBinXSlider->Connect("PositionChanged(Int_t)","TH2Editor",this, "DoBinMoved()");
   fBinXSlider->Connect("Released()","TH2Editor",this, "DoBinReleased()");
   fBinXSlider->Connect("Pressed()","TH2Editor",this, "DoBinPressed()");
   fBinYSlider->Connect("PositionChanged(Int_t)","TH2Editor",this, "DoBinMoved()");
   fBinYSlider->Connect("Released()","TH2Editor",this, "DoBinReleased()");
   fBinYSlider->Connect("Pressed()","TH2Editor",this, "DoBinPressed()");
   fBinXNumberEntry->Connect("ReturnPressed()", "TH2Editor", this, "DoBinLabel()");
   fBinYNumberEntry->Connect("ReturnPressed()", "TH2Editor", this, "DoBinLabel()");
   fApply->Connect("Clicked()", "TH2Editor", this, "DoApply()");
   fCancel->Connect("Pressed()", "TH2Editor", this, "DoCancel()");
   fBinXSlider1->Connect("Released()","TH2Editor",this, "DoBinReleased1()");
   fBinXSlider1->Connect("PositionChanged(Int_t)","TH2Editor",this, "DoBinMoved1()");
   fBinXNumberEntry1->Connect("ReturnPressed()", "TH2Editor", this, "DoBinLabel1()");
   fXBinOffsetSld->Connect("PositionChanged(Int_t)","TH2Editor",this, "DoOffsetMoved()");
   fXBinOffsetSld->Connect("Released()","TH2Editor",this, "DoOffsetReleased()");
   fXBinOffsetSld->Connect("Pressed()","TH2Editor",this, "DoOffsetPressed()");
   fXOffsetNumberEntry->Connect("ReturnPressed()", "TH2Editor", this, "DoBinOffset()");
   fBinYSlider1->Connect("Released()","TH2Editor",this, "DoBinReleased1()");
   fBinYSlider1->Connect("PositionChanged(Int_t)","TH2Editor",this, "DoBinMoved1()");
   fBinYNumberEntry1->Connect("ReturnPressed()", "TH2Editor", this, "DoBinLabel1()");
   fYBinOffsetSld->Connect("PositionChanged(Int_t)","TH2Editor",this,"DoOffsetMoved()");
   fYBinOffsetSld->Connect("Released()","TH2Editor",this, "DoOffsetReleased()");
   fYBinOffsetSld->Connect("Pressed()","TH2Editor",this, "DoOffsetPressed()");
   fYOffsetNumberEntry->Connect("ReturnPressed()", "TH2Editor", this,"DoBinOffset()");
   fSliderX->Connect("PositionChanged()","TH2Editor",this, "DoSliderXMoved()");
   fSliderX->Connect("Pressed()","TH2Editor",this, "DoSliderXPressed()");
   fSliderX->Connect("Released()","TH2Editor",this, "DoSliderXReleased()");
   fSldXMin->Connect("ReturnPressed()", "TH2Editor", this, "DoXAxisRange()");
   fSldXMax->Connect("ReturnPressed()", "TH2Editor", this, "DoXAxisRange()");
   fSliderY->Connect("PositionChanged()","TH2Editor",this, "DoSliderYMoved()");
   fSliderY->Connect("Pressed()","TH2Editor",this, "DoSliderYPressed()");
   fSliderY->Connect("Released()","TH2Editor",this, "DoSliderYReleased()");
   fSldYMin->Connect("ReturnPressed()", "TH2Editor", this, "DoYAxisRange()");
   fSldYMax->Connect("ReturnPressed()", "TH2Editor", this, "DoYAxisRange()");
   fFrameColor->Connect("ColorSelected(Pixel_t)", "TH2Editor", this, "DoFillColor(Pixel_t)");
   fFramePattern->Connect("PatternSelected(Style_t)", "TH2Editor", this, "DoFillPattern(Style_t)");
 
   fInit = kFALSE;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Check if object is able to configure with this editor.
 
Bool_t TH2Editor::AcceptModel(TObject* obj)
{
   if (obj == 0 || !obj->InheritsFrom(TH2::Class()) ||
       (!strcmp(((TH2 *)obj)->GetName(),"htemp") &&
        ((TH2*)obj)->GetEntries() == 0)) {  // htemp is an empty histogram
      return kFALSE;
   }
   return kTRUE;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Pick up the values of current histogram attributes.
 
void TH2Editor::SetModel(TObject* obj)
{
   fAvoidSignal = kTRUE;
   if (fBinHist && (obj != fHist)) {
      //we have probably moved to a different pad.
      //let's restore the original histogram
      if (fHist) {
         fHist->Reset();
         fHist->SetBins(fBinHist->GetXaxis()->GetNbins(),
                        fBinHist->GetXaxis()->GetXmin(),
                        fBinHist->GetXaxis()->GetXmax(),
                        fBinHist->GetYaxis()->GetNbins(),
                        fBinHist->GetYaxis()->GetXmin(),
                        fBinHist->GetYaxis()->GetXmax());
         fHist->Add(fBinHist);
      }
      // delete in anycase fBinHist also when fHist is zero (i.e when it has been deleted)
      delete fBinHist;
      fBinHist = 0;
      if (fGedEditor->GetPad()) {
         fGedEditor->GetPad()->Modified();
         fGedEditor->GetPad()->Update();
      }
   }
 
   fHist = (TH2*) obj;
 
   const char *text = fHist->GetTitle();
   fTitle->SetText(text);
   TString str = GetDrawOption();
   fCutString = GetCutOptionString();
   str.ToUpper();
 
   if (str == "") {
      // default options = Scatter-Plot
      ShowFrame(f6);
      HideFrame(f9);
      HideFrame(f12);
      HideFrame(f13);
      HideFrame(f38);
      fDimGroup->SetButton(kDIM_SIMPLE, kTRUE);
      fDimGroup->SetButton(kDIM_COMPLEX, kFALSE);
      if (fTypeCombo->GetSelected()==-1) fTypeCombo->Select(kTYPE_LEGO);
      if (fCoordsCombo->GetSelected()==-1) fCoordsCombo->Select(kCOORDS_CAR);
      if (fContCombo->GetSelected()==-1) fContCombo->Select(kCONT_NONE);
 
      fAddArr->SetState(kButtonUp);
      fAddBox->SetState(kButtonUp);
      fAddCol->SetState(kButtonUp);
      fAddScat->SetState(kButtonDisabled);
      fAddText->SetState(kButtonUp);
      fAddError->SetState(kButtonUp);
      fAddPalette->SetState(kButtonDisabled);
      fAddPalette1->SetState(kButtonUp);
      fAddFB->SetState(kButtonDown);
      fAddBB->SetState(kButtonDown);
   } else if (!str.Contains("LEGO") && !str.Contains("SURF")) {
      ShowFrame(f6);
      HideFrame(f9);
      HideFrame(f12);
      HideFrame(f13);
      HideFrame(f38);
      fDimGroup->SetButton(kDIM_SIMPLE, kTRUE);
      fDimGroup->SetButton(kDIM_COMPLEX, kFALSE);
      if (fTypeCombo->GetSelected()==-1) fTypeCombo->Select(kTYPE_LEGO);
      if (fCoordsCombo->GetSelected()==-1) fCoordsCombo->Select(kCOORDS_CAR);
      if (str.Contains("CONT")){
         if (str.Contains("CONT1")) fContCombo->Select(kCONT_1);
         else if (str.Contains("CONT2")) fContCombo->Select(kCONT_2);
         else if (str.Contains("CONT3")) fContCombo->Select(kCONT_3);
         else if (str.Contains("CONT4")) fContCombo->Select(kCONT_4);
         else if (str.Contains("CONT0") || str.Contains("CONT"))
            fContCombo->Select(kCONT_0);
      } else fContCombo->Select(kCONT_NONE);
 
      if (str.Contains("ARR")) fAddArr->SetState(kButtonDown);
      else fAddArr->SetState(kButtonUp);
      if (str.Contains("BOX")) fAddBox->SetState(kButtonDown);
      else fAddBox->SetState(kButtonUp);
      if (str.Contains("COL")) fAddCol->SetState(kButtonDown);
      else fAddCol->SetState(kButtonUp);
      if (str.Contains("SCAT")) {
         if (str=="SCAT") fAddScat->SetState(kButtonDisabled);
         else fAddScat->SetState(kButtonDown);
      } else fAddScat->SetState(kButtonUp);
      if (str.Contains("TEXT")) fAddText->SetState(kButtonDown);
      else fAddText->SetState(kButtonUp);
 
      fAddError->SetState(kButtonUp);
      if (str.Contains("COL") || (str.Contains("CONT") &&
          !str.Contains("CONT2") && !str.Contains("CONT3"))) {
         if (str.Contains("Z")) fAddPalette->SetState(kButtonDown);
         else fAddPalette->SetState(kButtonUp);
      } else fAddPalette->SetState(kButtonDisabled);
      fAddPalette1->SetState(kButtonUp);
      fAddFB->SetState(kButtonDown);
      fAddBB->SetState(kButtonDown);
 
   } else if (str.Contains("LEGO") || str.Contains("SURF")) {
      HideFrame(f6);
      ShowFrame(f9);
      ShowFrame(f12);
      ShowFrame(f13);
      ShowFrame(f38);
      fDimGroup->SetButton(kDIM_COMPLEX, kTRUE);
      fDimGroup->SetButton(kDIM_SIMPLE, kFALSE);
      if (str.Contains("LEGO4")) fTypeCombo->Select(kTYPE_LEGO4);
      else if (str.Contains("LEGO3")) fTypeCombo->Select(kTYPE_LEGO3);
      else if (str.Contains("LEGO2")) fTypeCombo->Select(kTYPE_LEGO2);
      else if (str.Contains("LEGO1")) fTypeCombo->Select(kTYPE_LEGO1);
      else if (str.Contains("LEGO"))  fTypeCombo->Select(kTYPE_LEGO);
      else if (str.Contains("SURF5")) fTypeCombo->Select(kTYPE_SURF5);
      else if (str.Contains("SURF4")) fTypeCombo->Select(kTYPE_SURF4);
      else if (str.Contains("SURF3")) fTypeCombo->Select(kTYPE_SURF3);
      else if (str.Contains("SURF2")) fTypeCombo->Select(kTYPE_SURF2);
      else if (str.Contains("SURF1")) fTypeCombo->Select(kTYPE_SURF1);
      else if (str.Contains("SURF")) fTypeCombo->Select(kTYPE_SURF);
 
 
      if (str.Contains("CYL")) fCoordsCombo->Select(kCOORDS_CYL);
      else if (str.Contains("POL")) fCoordsCombo->Select(kCOORDS_POL);
      else if (str.Contains("SPH")) fCoordsCombo->Select(kCOORDS_SPH);
      else if (str.Contains("PSR")) fCoordsCombo->Select(kCOORDS_PSR);
      else fCoordsCombo->Select(kCOORDS_CAR); //default
 
      if (fContCombo->GetSelected()==-1) fContCombo->Select(kCONT_NONE);
      fAddArr->SetState(kButtonUp);
      fAddBox->SetState(kButtonUp);
      fAddCol->SetState(kButtonUp);
      fAddScat->SetState(kButtonDisabled);
      fAddText->SetState(kButtonUp);
 
      if (fCoordsCombo->GetSelected()!=kCOORDS_CAR) {
         if (fAddFB->GetState()!=kButtonDisabled)
            fAddFB->SetState(kButtonDisabled);
         if (fAddBB->GetState()!=kButtonDisabled)
            fAddBB->SetState(kButtonDisabled);
         if (fAddError->GetState()!=kButtonDisabled)
            fAddError->SetState(kButtonDisabled);
      } else {
         if (str.Contains("FB")) fAddFB->SetState(kButtonUp);
         else fAddFB->SetState(kButtonDown);
         if (str.Contains("BB")) fAddBB->SetState(kButtonUp);
         else fAddBB->SetState(kButtonDown);
         if (str.Contains("E")){
            TString dum = str;
            if (str.Contains("LEGO"))
               dum.Remove(strstr(dum.Data(),"LEGO")-dum.Data(),4);
            if (str.Contains("TEXT"))
               dum.Remove(strstr(dum.Data(),"TEXT")-dum.Data(),4);
            if (dum.Contains("E")) fAddError->SetState(kButtonDown);
            else fAddError->SetState(kButtonUp);
         } else fAddError->SetState(kButtonUp);
      }
      if ((fTypeCombo->GetSelected()==kTYPE_LEGO) ||
          (fTypeCombo->GetSelected()==kTYPE_LEGO1)||
          (fTypeCombo->GetSelected()==kTYPE_LEGO3)||
          (fTypeCombo->GetSelected()==kTYPE_LEGO4)||
          (fTypeCombo->GetSelected()==kTYPE_SURF) ||
          (fTypeCombo->GetSelected()==kTYPE_SURF4))
         fAddPalette1->SetState(kButtonDisabled);
      else if (str.Contains("Z")) fAddPalette1->SetState(kButtonDown);
      else fAddPalette1->SetState(kButtonUp);
   }
 
   fBarWidth->SetNumber(fHist->GetBarWidth());
   fBarOffset->SetNumber(fHist->GetBarOffset());
 
   Int_t nx = fHist -> GetXaxis() -> GetNbins();
   Int_t nxbinmin = fHist -> GetXaxis() -> GetFirst();
   Int_t nxbinmax = fHist -> GetXaxis() -> GetLast();
   fSliderX->SetRange(1,nx);
   fSliderX->SetPosition((Double_t)nxbinmin,(Double_t)nxbinmax);
   fSldXMin->SetNumber(fHist->GetXaxis()->GetBinLowEdge(nxbinmin));
   fSldXMax->SetNumber(fHist->GetXaxis()->GetBinUpEdge(nxbinmax));
 
   Int_t ny = fHist -> GetYaxis() -> GetNbins();
   Int_t nybinmin = fHist -> GetYaxis() -> GetFirst();
   Int_t nybinmax = fHist -> GetYaxis() -> GetLast();
   fSliderY->SetRange(1,ny);
   fSliderY->SetPosition((Double_t)nybinmin,(Double_t)nybinmax);
   fSldYMin->SetNumber(fHist->GetYaxis()->GetBinLowEdge(nybinmin));
   fSldYMax->SetNumber(fHist->GetYaxis()->GetBinUpEdge(nybinmax));
 
   if (fDelaydraw->GetState()!=kButtonDown) fDelaydraw->SetState(kButtonUp);
 
   if (str.Contains("COL") || fContCombo->GetSelected()!= kCONT_NONE)
      fColContLbl->Enable() ;
   else fColContLbl->Disable();
 
   if (str.Contains("LEGO2") || str.Contains("SURF1") ||
       str.Contains("SURF2") || str.Contains("SURF3") ||
       str.Contains("SURF5")) fColContLbl1->Enable();
   else fColContLbl1->Disable();
 
   fContLevels->SetIntNumber(fHist->GetContour());
   fContLevels1->SetIntNumber(fHist->GetContour());
 
   fFrameColor->SetColor(TColor::Number2Pixel(fGedEditor->GetPad()->GetFrameFillColor()));
   fFramePattern->SetPattern(fGedEditor->GetPad()->GetFrameFillStyle());
 
   TTreePlayer *player = (TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer();
 
 
   // Check if histogram is from ntupla/tree or not.
   // If it is a standard histogram or a ntupla based histogram
   // show a different frame in case of rebinning (fBinCont) with sliders and bin number entries
   // connected to different methods.
   // For example  the entry field fBinXNumberEntry is connected to
   // the method DoBinLabel in case of non-ntupla histograms which just call Th1::Rebin
   // In csae of a tree based histogram the entry field fBinNumberEntry1 is used which is connected to
   // TH1Editor::DoBinLabel1 which is re-filling the histograms with the cached values from the TTreePlayer.
   // Since the actual number of histogram entry can be larger than the cache size of the TTreePlayer
   // (see JIRA ROOT-5900 or http://root.cern.ch/phpBB3/viewtopic.php?f=3&t=17107 )
   // the GUI frame based on a non-tupla histogram is used when the number of entries of the histogram is
   // not the same as the number of filled entries in the TTreePlayer object.
 
   if (!player || player->GetHistogram()!=fHist ||
       fHist->GetEntries() != player->GetNfill())  {
      Int_t n1 = 0, n2 =0;
      Int_t upx =0, upy =0;
      if (fBinHist) n1 = fBinHist->GetXaxis()->GetNbins();
      else n1 = nx;
      if (fBinHist) n2 = fBinHist->GetYaxis()->GetNbins();
      else n2 = ny;
      fBin->HideFrame(fBinXCont1);
      fBin->ShowFrame(fBinXCont);
      fBin->HideFrame(fBinYCont1);
      if (n1 < 1) n1 = 1;
      if (n2 < 1) n2 = 1;
      Int_t* divx = Dividers(n1);
      Int_t* divy = Dividers(n2);
      if (divx[0]-1 <= 1) upx = 2;
      else upx = divx[0]-1;
      fBinXSlider->SetRange(1,upx);
      if (divy[0]-1 <= 1) upy = 2;
      else upy = divy[0]-1;
      fBinYSlider->SetRange(1,upy);
      Int_t i = 1; Int_t j = 1;
      if (fBinXSlider->GetMaxPosition()==2 && fBinXSlider->GetPosition()==2)
         fBinXSlider->SetPosition(2);
      else {
         while ( divx[i] != nx) i ++;
         fBinXSlider->SetPosition(divx[0] - i + 1);
      }
      if (fBinYSlider->GetMaxPosition()==2 && fBinYSlider->GetPosition()==2)
         fBinYSlider->SetPosition(2);
      else {
         while ( divy [j] != ny) j ++;
         fBinYSlider->SetPosition(divy[0] - j + 1);
      }
      fBinXNumberEntry->SetLimits(TGNumberFormat::kNELLimitMinMax, 2, n1);
      fBinXNumberEntry->SetIntNumber(nx);
      fBinYNumberEntry->SetLimits(TGNumberFormat::kNELLimitMinMax, 2, n2);
      fBinYNumberEntry->SetIntNumber(ny);
      delete [] divx;
      delete [] divy;
   }
   else if (player &&  fHist==player->GetHistogram() && fHist->GetEntries() == player->GetNfill()) {
      fBin->HideFrame(fBinXCont);
      fBin->ShowFrame(fBinXCont1);
      fBin->ShowFrame(fBinYCont1);
      fBinXSlider1->SetPosition(5);
      fBinXNumberEntry1->SetLimits(TGNumberFormat::kNELLimitMinMax, 1, 1000);
      fBinXNumberEntry1->SetIntNumber(nxbinmax-nxbinmin+1);
      fBinYSlider1->SetPosition(5);
      fBinYNumberEntry1->SetLimits(TGNumberFormat::kNELLimitMinMax, 1, 1000);
      fBinYNumberEntry1->SetIntNumber(nybinmax-nybinmin+1);
   }
 
   fXOffsetNumberEntry->SetLimits(TGNumberFormat::kNELLimitMinMax, 0,
                                  fHist->GetXaxis()->GetBinWidth(1));
   fYOffsetNumberEntry->SetLimits(TGNumberFormat::kNELLimitMinMax, 0,
                                  fHist->GetYaxis()->GetBinWidth(1));
   if (!fGedEditor->GetTab()->IsEnabled(fGedEditor->GetTab()->GetCurrent())) fGedEditor->GetTab()->SetTab(0);
 
   if (fInit) ConnectSignals2Slots();
   fGedEditor->GetTab()->SetEnabled(1, kTRUE);
   fAvoidSignal = kFALSE;
 
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the histogram title setting.
 
void TH2Editor::DoTitle(const char *text)
{
   if (fAvoidSignal) return;
   fHist->SetTitle(text);
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the 'Plot' button group.
 
void TH2Editor::DoHistView()
{
   if (gPad && gPad->GetVirtCanvas()) gPad->GetVirtCanvas()->SetCursor(kWatch);
   gVirtualX->SetCursor(GetId(), gVirtualX->CreateCursor(kWatch));
 
   if (fDim->GetState() == kButtonDown)
      DoHistSimple();
   else
      DoHistComplex();
 
   if (gPad && gPad->GetVirtCanvas()) gPad->GetVirtCanvas()->SetCursor(kPointer);
   gVirtualX->SetCursor(GetId(), gVirtualX->CreateCursor(kPointer));
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the 2D-Plot radio button.
 
void TH2Editor::DoHistSimple()
{
   if (fAvoidSignal) return;
   TString str = "";
   ShowFrame(f6);
   HideFrame(f9);
   HideFrame(f12);
   HideFrame(f13);
   HideFrame(f38);
   if (fContCombo->GetSelected()==-1)
      fContCombo->Select(kCONT_NONE);
   if ((fContCombo->GetSelected()!= kCONT_NONE) &&
        fAddPalette->GetState()==kButtonDisabled)
      fAddPalette->SetState(kButtonUp);
 
   str = GetHistContLabel()+GetHistAdditiveLabel();
   if (str=="" || str=="SCAT" || str==fCutString) {
      fAddScat->SetState(kButtonDisabled);
      fAddPalette->SetState(kButtonDisabled);
   } else if (fAddScat->GetState()==kButtonDisabled)
      fAddScat->SetState(kButtonUp);
   if (str.Contains("COL") || fContCombo->GetSelected()!= kCONT_NONE)
      fColContLbl->Enable();
   else fColContLbl->Disable();
 
   ((TGMainFrame*)GetMainFrame())->Layout();
 
   TString ocut = fCutString;
   ocut.ToUpper();
   if (!str.Contains(fCutString) && !str.Contains(ocut))
      str+=fCutString;
   SetDrawOption(str);
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the 3D-Plot radio button.
 
void TH2Editor::DoHistComplex()
{
   if (fAvoidSignal) return;
   TString str = "";
   HideFrame(f6);
   ShowFrame(f9);
   ShowFrame(f38);
   if (GetHistTypeLabel().Contains("LEGO")) {
      ShowFrame(f12);
      ShowFrame(f13);
   } else {
      HideFrame(f12);
      HideFrame(f13);
   }
   if (fTypeCombo->GetSelected()==-1) fTypeCombo->Select(kTYPE_LEGO);
   if (fCoordsCombo->GetSelected()==-1) fCoordsCombo->Select(kCOORDS_CAR);
 
   str = GetHistTypeLabel()+GetHistCoordsLabel()+GetHistAdditiveLabel();
 
   if (str.Contains("LEGO2") || str.Contains("SURF1") ||
       str.Contains("SURF2") || str.Contains("SURF3") ||
       str.Contains("SURF5")) {
      fColContLbl1->Enable();
      if (fAddPalette1->GetState()==kButtonDisabled)
         fAddPalette1->SetState(kButtonUp);
   } else {
      fColContLbl1->Disable();
      fAddPalette1->SetState(kButtonDisabled);
   }
 
   ((TGMainFrame*)GetMainFrame())->Layout();
 
   TString ocut = fCutString;
   ocut.ToUpper();
   if (!str.Contains(fCutString) && !str.Contains(ocut))
      str+=fCutString;
   SetDrawOption(str);
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to histogram type, coordinate system, contour combo box.
 
void TH2Editor::DoHistChanges()
{
   if (fAvoidSignal) return;
   TString str = "";
   if (fDim->GetState() == kButtonDown) {
      str = GetHistContLabel()+GetHistAdditiveLabel();
      if ((fContCombo->GetSelected()!=kCONT_NONE &&
           fContCombo->GetSelected()!=kCONT_2 &&
           fContCombo->GetSelected()!=kCONT_3) || str.Contains("COL")) {
 
         if (str.Contains("Z")) fAddPalette->SetState(kButtonDown);
         else fAddPalette->SetState(kButtonUp);
      } else fAddPalette->SetState(kButtonDisabled);
      if (str=="" || str=="SCAT" || str==fCutString) {
         fAddScat->SetState(kButtonDisabled);
         fAddPalette->SetState(kButtonDisabled);
      } else if (fAddScat->GetState()==kButtonDisabled)
         fAddScat->SetState(kButtonUp);
      str = GetHistContLabel()+GetHistAdditiveLabel();
      if (str.Contains("COL") || fContCombo->GetSelected()!= kCONT_NONE)
         fColContLbl->Enable();
      else
         fColContLbl->Disable();
 
   } else if (fDim0->GetState() == kButtonDown) {
      if (fCoordsCombo->GetSelected()!=kCOORDS_CAR) {
         if (fAddFB->GetState()!=kButtonDisabled)
            fAddFB->SetState(kButtonDisabled);
         if (fAddBB->GetState()!=kButtonDisabled)
            fAddBB->SetState(kButtonDisabled);
         if (fAddError->GetState()!=kButtonDisabled)
            fAddError->SetState(kButtonDisabled);
      } else {
         if (fAddFB->GetState()==kButtonDisabled)
            fAddFB->SetState(kButtonDown);
         if (fAddBB->GetState()==kButtonDisabled)
            fAddBB->SetState(kButtonDown);
         if (fAddError->GetState()==kButtonDisabled)
            fAddError->SetState(kButtonUp);
      }
      if ((fTypeCombo->GetSelected()==kTYPE_LEGO) ||
          (fTypeCombo->GetSelected()==kTYPE_LEGO1)||
          (fTypeCombo->GetSelected()==kTYPE_LEGO3)||
          (fTypeCombo->GetSelected()==kTYPE_LEGO4)||
          (fTypeCombo->GetSelected()==kTYPE_SURF) ||
          (fTypeCombo->GetSelected()==kTYPE_SURF4))
         fAddPalette1->SetState(kButtonDisabled);
      else if (fAddPalette1->GetState()==kButtonDisabled)
         fAddPalette1->SetState(kButtonUp);
      if (GetHistTypeLabel().Contains("LEGO")) {
         ShowFrame(f12);
         ShowFrame(f13);
      } else {
         HideFrame(f12);
         HideFrame(f13);
      }
      ((TGMainFrame*)GetMainFrame())->Layout();
      str = GetHistTypeLabel()+GetHistCoordsLabel()+GetHistAdditiveLabel();
      if (str.Contains("LEGO2") || str.Contains("SURF1") ||
          str.Contains("SURF2") || str.Contains("SURF3") ||
          str.Contains("SURF5"))
         fColContLbl1->Enable();
      else
         fColContLbl1->Disable() ;
   }
 
   TString ocut = fCutString;
   ocut.ToUpper();
   if (!str.Contains(fCutString) && !str.Contains(ocut))
      str+=fCutString;
   SetDrawOption(str);
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the "Arrow draw option" check button.
 
void TH2Editor::DoAddArr(Bool_t on)
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   if (on) {
      if (!str.Contains("ARR")) {
         str += "ARR";
         if (fAddScat->GetState()==kButtonDisabled)
            fAddScat->SetState(kButtonUp);
         make=kTRUE;
      }
   } else if (fAddArr->GetState()==kButtonUp) {
      if (str.Contains("ARR")) {
         str.Remove(strstr(str.Data(),"ARR")-str.Data(),3);
         if (str=="" || str=="SCAT" || str==fCutString) {
            fAddScat->SetState(kButtonDisabled);
            fAddPalette->SetState(kButtonDisabled);
         }
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the "Box draw option" check button.
 
void TH2Editor::DoAddBox(Bool_t on)
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   if (on) {
      if (!str.Contains("BOX")) {
         str += "BOX";
         if (fAddScat->GetState()==kButtonDisabled)
            fAddScat->SetState(kButtonUp);
         make=kTRUE;
      }
   } else if (fAddBox->GetState()==kButtonUp) {
      if (str.Contains("BOX")) {
         str.Remove(strstr(str.Data(),"BOX")-str.Data(),3);
         if (str=="" || str=="SCAT" || str==fCutString) {
            fAddScat->SetState(kButtonDisabled);
            fAddPalette->SetState(kButtonDisabled);
         }
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the "Col draw option" check button.
 
void TH2Editor::DoAddCol(Bool_t on)
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   if (on) {
      if (!str.Contains("COL")) {
         str += "COL";
         fColContLbl->Enable() ;
         if (fAddScat->GetState()==kButtonDisabled)
            fAddScat->SetState(kButtonUp);
         if (fAddPalette->GetState()==kButtonDisabled)
            fAddPalette->SetState(kButtonUp);
         make=kTRUE;
      }
   } else if (fAddCol->GetState()==kButtonUp) {
      if (str.Contains("COL")) {
         str.Remove(strstr(str.Data(),"COL")-str.Data(),3);
         if (fAddBox->GetState()==kButtonDisabled)
            fAddBox->SetState(kButtonUp);
         if (fContCombo->GetSelected()==kCONT_NONE) {
            fAddPalette->SetState(kButtonDisabled);
            if (str.Contains("Z"))
               str.Remove(strstr(str.Data(),"Z")-str.Data(),1);
         }
         if (str=="" || str=="SCAT" || str==fCutString)
            fAddScat->SetState(kButtonDisabled);
         if (fContCombo->GetSelected()!= kCONT_NONE)
            fColContLbl->Enable() ;
         else fColContLbl->Disable();
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the "Scat draw option" check button.
 
void TH2Editor::DoAddScat(Bool_t on)
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   if (on) {
      if (!str.Contains("SCAT")) {
         str += "SCAT";
         make=kTRUE;
      }
   } else if (fAddScat->GetState()==kButtonUp) {
      if (str.Contains("SCAT")) {
         str.Remove(strstr(str.Data(),"SCAT")-str.Data(),4);
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the "Text draw option" check button.
 
void TH2Editor::DoAddText(Bool_t on)
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   if (on) {
      if (!str.Contains("TEXT")) {
         str += "TEXT";
         if (fAddScat->GetState()==kButtonDisabled)
            fAddScat->SetState(kButtonUp);
         make=kTRUE;
      }
   } else if (fAddText->GetState()==kButtonUp) {
      if (str.Contains("TEXT")) {
         str.Remove(strstr(str.Data(),"TEXT")-str.Data(),4);
         if (str=="" || str=="SCAT" || str==fCutString)
            fAddScat->SetState(kButtonDisabled);
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
      // next line is needed for marker editor refresh
      fGedEditor->GetCanvas()->Selected(fGedEditor->GetPad(), fHist, 1);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the "Error" check button.
 
void TH2Editor::DoAddError(Bool_t on)
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   TString dum = str;
   if (str.Contains("LEGO"))
      dum.Remove(strstr(dum.Data(),"LEGO")-dum.Data(),4);
   if (str.Contains("TEXT"))
      dum.Remove(strstr(dum.Data(),"TEXT")-dum.Data(),4);
   if (on) {
      if (!dum.Contains("E")) {
         str += "E";
         make=kTRUE;
      }
   } else if (fAddError->GetState() == kButtonUp) {
      if (str.Contains("E")) {
         if (fDim->GetState() == kButtonDown)
            str = GetHistContLabel()+GetHistAdditiveLabel();
         else
            str= GetHistTypeLabel()+GetHistCoordsLabel()+
                 GetHistAdditiveLabel();
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the color palette check button.
 
void TH2Editor::DoAddPalette(Bool_t on)
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   if (on) {
      if (!str.Contains("Z")) {
         str += "Z";
         make=kTRUE;
      }
   } else if (fAddPalette->GetState()==kButtonUp ||
              fAddPalette1->GetState()==kButtonUp) {
      if (str.Contains("Z")) {
         str.Remove(strstr(str.Data(),"Z")-str.Data(),1);
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the "FB front-box draw option" check button.
 
void TH2Editor::DoAddFB()
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   if (fAddFB->GetState()==kButtonDown) {
      if (str.Contains("FB")) {
         if (str.Contains("SURF") && !(str.Contains("1") ||
             str.Contains("2") || str.Contains("3") ||
             str.Contains("4") || str.Contains("5"))) {
            TString dum = str;
            dum.Remove(strstr(dum.Data(),"SURF")-dum.Data(),4);
            if (dum.Contains("FB"))
               dum.Remove(strstr(dum.Data(),"FB")-dum.Data(),2);
            str = "SURF" + dum;
         } else str.Remove(strstr(str.Data(),"FB")-str.Data(),2);
         make = kTRUE;
      }
   } else if (fAddFB->GetState()==kButtonUp){
      if (!str.Contains("FB")) {
         str += "FB";
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the "BB back-box draw option" check button.
 
void TH2Editor::DoAddBB()
{
   if (fAvoidSignal) return;
   Bool_t make=kFALSE;
   TString str = GetDrawOption();
   str.ToUpper();
 
   if (fAddBB->GetState()==kButtonDown) {
      if (str.Contains("BB")) {
         if (str.Contains("FB")) {
            TString dum = str;
            dum.Remove(strstr(dum.Data(),"FB")-dum.Data(),2);
            dum.Remove(strstr(dum.Data(),"BB")-dum.Data(),2);
            str=dum+"FB";
         } else str.Remove(strstr(str.Data(),"BB")-str.Data(),2);
         make = kTRUE;
      }
   } else if (fAddBB->GetState()==kButtonUp){
      if (!str.Contains("BB")) {
         str += "BB";
         make=kTRUE;
      }
   }
   if (make) {
      DoHistChanges();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the contour level number entry fContLevels.
 
void TH2Editor::DoContLevel()
{
   if (fAvoidSignal) return;
   fHist->SetContour((Int_t)fContLevels->GetNumber());
   fContLevels1->SetNumber((Int_t)fContLevels->GetNumber());
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the contour level number entry fContLevels1.
 
void TH2Editor::DoContLevel1()
{
   if (fAvoidSignal) return;
   fHist->SetContour((Int_t)fContLevels1->GetNumber());
   fContLevels->SetNumber((Int_t)fContLevels1->GetNumber());
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the bar width of the bar chart.
 
void TH2Editor::DoBarWidth()
{
   if (fAvoidSignal) return;
   fHist->SetBarWidth(fBarWidth->GetNumber());
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the bar offset of the bar chart.
 
void TH2Editor::DoBarOffset()
{
   if (fAvoidSignal) return;
   fHist->SetBarOffset((Float_t)fBarOffset->GetNumber());
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the rebin slider in case of no ntuple histogram.
/// It updates some other widgets related to the rebin slider.
 
void TH2Editor::DoBinReleased()
{
   // Draw the rebinned histogram in case of the delay draw mode
   if (fAvoidSignal) return;
   if (fDelaydraw->GetState()==kButtonDown){
      if (!fBinHist) {
         fBinHist = (TH2*)fHist->Clone("BinHist");
         fBinHist->SetDirectory(0); // TH2Editor manages this histogram
      }
      Int_t nx = fBinHist->GetXaxis()->GetNbins();
      Int_t ny = fBinHist->GetYaxis()->GetNbins();
      Int_t numx = fBinXSlider->GetPosition();
      Int_t numy = fBinYSlider->GetPosition();
      Int_t* divx = Dividers(nx);
      Int_t* divy = Dividers(ny);
      if (divx[0]==2) fBinXSlider->SetPosition(2);
      if (divy[0]==2) fBinYSlider->SetPosition(2);
      if (divx[0]==2 && divy[0]==2) {
         delete [] divx;
         delete [] divy;
         return;
      }
      // delete the histogram which is on the screen
      fGedEditor->GetPad()->cd();
      fHist->Reset();
      fHist->SetBins(nx,fBinHist->GetXaxis()->GetXmin(),
                     fBinHist->GetXaxis()->GetXmax(),
                     ny,fBinHist->GetYaxis()->GetXmin(),
                     fBinHist->GetYaxis()->GetXmax());
      fHist->Add(fBinHist);
      fHist->SetCanExtend(TH1::kNoAxis);
      fHist->Rebin2D(divx[numx], divy[numy]);
 
      //fModel=fHist;
 
      if (divx[0]!=2) {
         TAxis* xaxis = fHist->GetXaxis();
         Double_t xBinWidth = xaxis->GetBinWidth(1);
         xaxis->SetRangeUser(fSldXMin->GetNumber()+xBinWidth/2,
                             fSldXMax->GetNumber()-xBinWidth/2);
         fSliderX->SetRange(1,(Int_t)nx/divx[numx]);
         fSliderX->SetPosition(xaxis->FindBin(fSldXMin->GetNumber()+xBinWidth/2),
                               xaxis->FindBin(fSldXMax->GetNumber()-xBinWidth/2));
         // the axis range could be changed a little bit by the Rebin algorithm
         fSldXMin->SetNumber(xaxis->GetBinLowEdge(xaxis->GetFirst()));
         fSldXMax->SetNumber(xaxis->GetBinUpEdge(xaxis->GetLast()));
      }
      if (divy[0]!=2) {
         TAxis* yaxis = fHist->GetYaxis();
         Double_t yBinWidth = yaxis->GetBinWidth(1);
         yaxis->SetRangeUser(fSldYMin->GetNumber()+yBinWidth/2,
                             fSldYMax->GetNumber()-yBinWidth/2);
         fSliderY->SetRange(1,(Int_t)ny/divy[numy]);
         fSliderY->SetPosition(yaxis->FindBin(fSldYMin->GetNumber()+yBinWidth/2),
                               yaxis->FindBin(fSldYMax->GetNumber()-yBinWidth/2));
         fSldYMin->SetNumber(yaxis->GetBinLowEdge(yaxis->GetFirst()));
         fSldYMax->SetNumber(yaxis->GetBinUpEdge(yaxis->GetLast()));
      }
      if (fCancel->GetState()==kButtonDisabled) fCancel->SetState(kButtonUp);
      if (fApply->GetState()==kButtonDisabled) fApply->SetState(kButtonUp);
      Update();
      delete [] divx;
      delete [] divy;
   }
//   fGedEditor->GetPad()->GetCanvas()->Selected(fGedEditor->GetPad(), fHist,  0);
   // fModel = fHist;
   Refresh(fHist);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the rebin slider in case of no ntuple histogram.
 
void TH2Editor::DoBinPressed()
{
   if (fAvoidSignal) return;
   Int_t* divx = Dividers(fHist->GetXaxis()->GetNbins());
   Int_t* divy = Dividers(fHist->GetYaxis()->GetNbins());
   if (divx[0]==2 && divy[0]==2 && !fBinHist)
      new TGMsgBox(fClient->GetDefaultRoot(), this->GetMainFrame(),
                   "TH2Editor", "It is not possible to rebin the histogram",
                   kMBIconExclamation, kMBOk, 0, kVerticalFrame);
   // calling the MessageBox again does NOT work!*/
   delete [] divx;
   delete [] divy;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the rebin sliders in case of no ntuple histogram
/// does the rebinning of the selected histogram.
 
void TH2Editor::DoBinMoved()
{
   // create a clone in the background, when the slider is moved for 1st time
   if (fAvoidSignal) return;
   if (!fBinHist /*&& fDelaydraw->GetState()!=kButtonDown*/) {
      Int_t* divx = Dividers(fHist->GetXaxis()->GetNbins());
      Int_t* divy = Dividers(fHist->GetYaxis()->GetNbins());
      // if there is nothing to rebin:
      if (divx[0]==2 && divy[0]==2) {
         delete [] divx;
         delete [] divy;
         return;
      }
      fBinHist = (TH2*)fHist->Clone("BinHist");
      fBinHist->SetDirectory(0);    // TH2Editor manages this histogram
      delete [] divx;
      delete [] divy;
   }
   // if the slider already has been moved and the clone is saved
   Int_t nx = fBinHist->GetXaxis()->GetNbins();
   Int_t ny = fBinHist->GetYaxis()->GetNbins();
   Int_t numx = fBinXSlider->GetPosition();
   Int_t numy = fBinYSlider->GetPosition();
   if (nx < 1 || ny < 1) return;
   Int_t* divx = Dividers(nx);
   Int_t* divy = Dividers(ny);
   if (divx[0]==2) {
      fBinXSlider->SetPosition(2);
      numx=1;
   }
   if (divy[0]==2) {
      fBinYSlider->SetPosition(2);
      numy=1;
   }
   Int_t maxx = (Int_t)nx/divx[numx];
   Int_t maxy = (Int_t)ny/divy[numy];
   if (maxx==1) maxx=2;
   if (maxy==1) maxy=2;
   if (fDelaydraw->GetState()==kButtonUp){
      // delete the histogram which is on the screen
      fGedEditor->GetPad()->cd();
      fHist->Reset();
      fHist->SetBins(nx,fBinHist->GetXaxis()->GetXmin(),
                     fBinHist->GetXaxis()->GetXmax(),
                     ny,fBinHist->GetYaxis()->GetXmin(),
                     fBinHist->GetYaxis()->GetXmax());
      fHist->Add(fBinHist);
      fHist->SetCanExtend(TH1::kNoAxis);
      fHist->Rebin2D(divx[numx], divy[numy]);
      //fModel=fHist;
      if (divx[0]!=2) {
         TAxis* xaxis = fHist->GetXaxis();
         Double_t xBinWidth = xaxis->GetBinWidth(1);
         // if the user has zoomed into a special area the range will be reset:
         xaxis->SetRangeUser(fSldXMin->GetNumber()+xBinWidth/2,
                             fSldXMax->GetNumber()-xBinWidth/2);
         fSliderX->SetRange(1,maxx);
         fSliderX->SetPosition(xaxis->FindBin(fSldXMin->GetNumber()+xBinWidth/2),
                               xaxis->FindBin(fSldXMax->GetNumber()-xBinWidth/2));
         // the axis range could be changed a little bit by the Rebin algorithm
         fSldXMin->SetNumber(xaxis->GetBinLowEdge(xaxis->GetFirst()));
         fSldXMax->SetNumber(xaxis->GetBinUpEdge(xaxis->GetLast()));
         fClient->NeedRedraw(fBinXSlider,kTRUE);
      }
      if (divy[0]!=2) {
         TAxis* yaxis = fHist->GetYaxis();
         Double_t yBinWidth = yaxis->GetBinWidth(1);
         yaxis->SetRangeUser(fSldYMin->GetNumber()+yBinWidth/2,
                             fSldYMax->GetNumber()-yBinWidth/2);
         fSliderY->SetRange(1,maxy);
         fSliderY->SetPosition(yaxis->FindBin(fSldYMin->GetNumber()+yBinWidth/2),
                               yaxis->FindBin(fSldYMax->GetNumber()-yBinWidth/2));
         fSldYMin->SetNumber(yaxis->GetBinLowEdge(yaxis->GetFirst()));
         fSldYMax->SetNumber(yaxis->GetBinUpEdge(yaxis->GetLast()));
         fClient->NeedRedraw(fBinYSlider,kTRUE);
      }
      Update();
   }
   // set the according NumberEntries
   if (fCancel->GetState()==kButtonDisabled)
      fCancel->SetState(kButtonUp);
   if (fApply->GetState()==kButtonDisabled)
      fApply->SetState(kButtonUp);
   fBinXNumberEntry->SetNumber(maxx);
   fBinYNumberEntry->SetNumber(maxy);
   delete [] divx;
   delete [] divy;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the Bin Number Entry for the Rebin.
 
void TH2Editor::DoBinLabel()
{
   if (fAvoidSignal) return;
   Int_t i;
   Int_t numx = (Int_t)(fBinXNumberEntry->GetNumber());
   Int_t numy = (Int_t)(fBinYNumberEntry->GetNumber());
   Int_t nx = 0;
   if (fBinHist) nx = fBinHist->GetXaxis()->GetNbins();
   else nx = fHist->GetXaxis()->GetNbins();
   Int_t ny = 0;
   if (fBinHist) ny = fBinHist->GetYaxis()->GetNbins();
   else ny = fHist->GetYaxis()->GetNbins();
   if (nx < 2 || ny < 2) return;
   // Get the divider of nx/ny which is closest to numx/numy
   Int_t *divx = Dividers(nx);
   Int_t *divy = Dividers(ny);
   Int_t diff = TMath::Abs(numx - divx[1]);
   Int_t c = 1; Int_t d = 1;
   for (i = 2; i <= divx[0]; i++) {
      if ((TMath::Abs(numx - divx[i])) < diff) {
         c = i;
         diff = TMath::Abs(numx - divx[i]);
      }
   }
   diff = TMath::Abs(numy - divy[1]);
   for (i = 2; i <= divy[0]; i++) {
      if ((TMath::Abs(numy - divy[i])) < diff) {
         d = i;
         diff = TMath::Abs(numy - divy[i]);
      }
   }
   if (divx[c]!= fHist->GetXaxis()->GetNbins() ||
       divy[d]!= fHist->GetYaxis()->GetNbins()) {
      fBinXNumberEntry->SetNumber(divx[c]);
      fBinXSlider->SetPosition(divx[0] - c +1);
      fBinYNumberEntry->SetNumber(divy[d]);
      fBinYSlider->SetPosition(divy[0] - d +1);
      if (fDelaydraw->GetState()==kButtonUp) DoBinMoved();
      else DoBinReleased();
   }
//   fGedEditor->GetPad()->GetCanvas()->Selected(fGedEditor->GetPad(), fHist,  0);
//   fModel = fHist;
   Refresh(fHist);
   delete [] divx;
   delete [] divy;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the Apply Button in the Rebinned histogram Window.
 
void TH2Editor::DoApply()
{
   Int_t ret = 0;
   new TGMsgBox(fClient->GetDefaultRoot(), this->GetMainFrame(),
                "TH2 Editor", "Replace origin histogram with rebinned one?",
                kMBIconQuestion, kMBYes | kMBNo, &ret, kVerticalFrame);
   if (ret==1) {
      if (fBinHist) {
         delete fBinHist;
         fBinHist = 0;
      }
      Int_t nx = fHist->GetXaxis()->GetNbins();
      Int_t ny = fHist->GetYaxis()->GetNbins();
      Int_t *divx = Dividers(nx);
      Int_t *divy = Dividers(ny);
      Int_t upx = 0, upy = 0;
      if (divx[0]-1 <= 1) upx = 2;
      else upx = divx[0]-1;
      if (divy[0]-1 <= 1) upy = 2;
      else upy = divy[0]-1;
      fBinXSlider->SetRange(1,upx);
      fBinYSlider->SetRange(1,upy);
      if (fBinXSlider->GetMaxPosition()==2 && divx[0]==2 )
         fBinXSlider->SetPosition(2);
      else fBinXSlider->SetPosition(1);
      if (fBinYSlider->GetMaxPosition()==2 && divy[0]==2 )
         fBinYSlider->SetPosition(2);
      else fBinYSlider->SetPosition(1);
      fCancel->SetState(kButtonDisabled);
      fApply->SetState(kButtonDisabled);
      Update();
      delete [] divx;
      delete [] divy;
   } else if (ret==2) DoCancel();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the Cancel Button in the Rebinned histogram Window.
 
void TH2Editor::DoCancel()
{
   if (fBinHist) {
      fGedEditor->GetPad()->cd();
      fHist->Reset();
      fHist->SetBins(fBinHist->GetXaxis()->GetNbins(),
                     fBinHist->GetXaxis()->GetXmin(),
                     fBinHist->GetXaxis()->GetXmax(),
                     fBinHist->GetYaxis()->GetNbins(),
                     fBinHist->GetYaxis()->GetXmin(),
                     fBinHist->GetYaxis()->GetXmax());
      fHist->Add(fBinHist);
      fHist->GetXaxis()->SetRange(fBinHist->GetXaxis()->GetFirst(),
                                  fBinHist->GetXaxis()->GetLast());
      fHist->GetYaxis()->SetRange(fBinHist->GetYaxis()->GetFirst(),
                                  fBinHist->GetYaxis()->GetLast());
 
      delete fBinHist;
      fBinHist = 0;
 
      fCancel->SetState(kButtonDisabled);
      fApply->SetState(kButtonDisabled);
      Int_t* divx = Dividers(fHist->GetXaxis()->GetNbins());
      Int_t* divy = Dividers(fHist->GetYaxis()->GetNbins());
      if (divx[0]!=2) fBinXSlider->SetPosition(1);
      if (divy[0]!=2) fBinYSlider->SetPosition(1);
      // Consigning the new Histogram to all other Editors
//      fGedEditor->GetPad()->GetCanvas()->Selected(fGedEditor->GetPad(), fHist,  0);
      Update();
      //  fModel = fHist;
      Refresh(fHist);
      delete [] divx;
      delete [] divy;
   }
}
 
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the BinNumber Slider in case of a 'ntuple histogram'.
/// It does the rebin.
 
void TH2Editor::DoBinReleased1()
{
   if (fAvoidSignal) return;
   Double_t oldXOffset = fXOffsetNumberEntry->GetNumber();
   Int_t xnumber = fBinXSlider1->GetPosition();
   Double_t oldYOffset = fYOffsetNumberEntry->GetNumber();
   Int_t ynumber = fBinYSlider1->GetPosition();
   if (xnumber==5 && ynumber==5) return;
   Int_t xfact = 0;
   Int_t yfact = 0;
   Int_t xBinNumber = 0;
   Int_t yBinNumber = 0;
   TAxis* xaxis = fHist->GetXaxis();
   TAxis* yaxis = fHist->GetYaxis();
   //"compute" the scaling factor:
   if (xnumber >= 5) xfact = xnumber - 4;
   else xfact = xnumber - 6;
   if (ynumber >= 5) yfact = ynumber - 4;
   else yfact = ynumber - 6;
   TTreePlayer *player = (TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer();
   if (!player) return;
   Int_t nx = xaxis->GetNbins();
   Int_t ny = yaxis->GetNbins();
   Int_t firstx = xaxis->GetFirst();
   Int_t lastx = xaxis->GetLast();
   Int_t firsty = yaxis->GetFirst();
   Int_t lasty = yaxis->GetLast();
   Double_t minx = xaxis->GetBinLowEdge(1);        // overall min in user coords
   Double_t maxx = xaxis->GetBinUpEdge(nx);        // overall max in user coords
   Double_t miny = yaxis->GetBinLowEdge(1);        // overall min in user coords
   Double_t maxy = yaxis->GetBinUpEdge(ny);        // overall max in user coords
   Double_t rminx = xaxis->GetBinLowEdge(firstx);  // recent min in user coords
   Double_t rmaxx = xaxis->GetBinUpEdge(lastx);    // recent max in user coords
   Double_t rminy = yaxis->GetBinLowEdge(firsty);  // recent min in user coords
   Double_t rmaxy = yaxis->GetBinUpEdge(lasty);    // recent max in user coords
 
   ((TH2*)player->GetHistogram())->SetCanExtend(TH1::kNoAxis);
   ((TH2*)player->GetHistogram())->Reset();
 
   // Get new Number of bins
   if (xfact > 0) xBinNumber = xfact*nx;
   if (xfact < 0) xBinNumber = (Int_t) ((-1)*nx/xfact+0.5);
   if (xBinNumber < 1) xBinNumber = 1;
   if (xBinNumber > 1000) xBinNumber= 1000;
   if (yfact > 0) yBinNumber = yfact*ny;
   if (yfact < 0) yBinNumber = (Int_t) ((-1)*ny/yfact+0.5);
   if (yBinNumber < 1) yBinNumber = 1;
   if (yBinNumber > 1000) yBinNumber= 1000;
   Double_t xOffset = 1.*fXBinOffsetSld->GetPosition()/100*((maxx-minx)/xBinNumber);
   Double_t yOffset = 1.*fYBinOffsetSld->GetPosition()/100*((maxy-miny)/yBinNumber);
   // create new histogram - the main job is done by sel->TakeAction()
 
   ((TH2*)player->GetHistogram())->SetBins(xBinNumber, minx-oldXOffset+xOffset,
                                           maxx-oldXOffset+xOffset,
                                           yBinNumber, miny-oldYOffset+yOffset,
                                           maxy-oldYOffset+yOffset);
   TSelectorDraw *sel = (TSelectorDraw*)player->GetSelector();
   if (!sel) return;
   sel->TakeAction();
 
   // Restore and set all the attributes which were changed by TakeAction()
   fHist = (TH2*)((TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer())->GetHistogram();
   fSliderX->SetRange(1,xBinNumber);
   fSliderY->SetRange(1,yBinNumber);
   Double_t xBinWidth = xaxis->GetBinWidth(1);
   Double_t yBinWidth = yaxis->GetBinWidth(1);
   fSliderX->SetPosition(xaxis->FindBin(rminx+xBinWidth/2),
                         xaxis->FindBin(rmaxx-xBinWidth/2));
   fSliderY->SetPosition(yaxis->FindBin(rminy+yBinWidth/2),
                         yaxis->FindBin(rmaxy-yBinWidth/2));
   xOffset = 1.*fXBinOffsetSld->GetPosition()/100*xBinWidth;  // nessesary ??
   yOffset = 1.*fYBinOffsetSld->GetPosition()/100*yBinWidth;  // nessesary ??
 
   // SetRange in BinNumbers along x and y!
   xaxis->SetRange(xaxis->FindBin(rminx+xBinWidth/2),
                                  xaxis->FindBin(rmaxx-xBinWidth/2));
   yaxis->SetRange(yaxis->FindBin(rminy+yBinWidth/2),
                                  yaxis->FindBin(rmaxy-yBinWidth/2));
   fSldXMin->SetNumber(xaxis->GetBinLowEdge(xaxis->GetFirst()));
   fSldXMax->SetNumber(xaxis->GetBinUpEdge(xaxis->GetLast()));
   fSldYMin->SetNumber(yaxis->GetBinLowEdge(yaxis->GetFirst()));
   fSldYMax->SetNumber(yaxis->GetBinUpEdge(yaxis->GetLast()));
   fBinXNumberEntry1->SetNumber(xaxis->GetLast() - xaxis->GetFirst()+1);
   fBinYNumberEntry1->SetNumber(yaxis->GetLast() - yaxis->GetFirst()+1);
   fBinXSlider1->SetPosition(5);
   fBinYSlider1->SetPosition(5);
   fXOffsetNumberEntry->SetNumber(xOffset);
   fYOffsetNumberEntry->SetNumber(yOffset);
   fXOffsetNumberEntry->SetLimits(TGNumberFormat::kNELLimitMinMax, 0,
                                  xaxis->GetBinWidth(1));
   fYOffsetNumberEntry->SetLimits(TGNumberFormat::kNELLimitMinMax, 0,
                                  yaxis->GetBinWidth(1));
   fClient->NeedRedraw(fBinXSlider1, kTRUE);
   // when you 2-clicks on a slider, sometimes it gets caught on wrong position! (2 or  -2)
   fClient->NeedRedraw(fBinYSlider1, kTRUE);
   // when you 2-clicks on a slider, sometimes it gets caught on wrong position! (2 or  -2)
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the rebin slider in case of an ntuple histogram.
/// Updates the BinNumberEntryField during the BinSlider movement.
 
void TH2Editor::DoBinMoved1()
{
   if (fAvoidSignal) return;
   TAxis* xaxis = fHist->GetXaxis();
   TAxis* yaxis = fHist->GetYaxis();
   Int_t firstx = xaxis->GetFirst();
   Int_t lastx = xaxis->GetLast();
   Int_t firsty = yaxis->GetFirst();
   Int_t lasty = yaxis->GetLast();
   Int_t xnumber = fBinXSlider1->GetPosition();
   Int_t ynumber = fBinYSlider1->GetPosition();
   Int_t numx = lastx-firstx+1;
   Int_t numy = lasty-firsty+1;
   Int_t xfact = 0;
   Int_t yfact = 0;
   Int_t xBinNumber = 0;
   Int_t yBinNumber = 0;
   if (xnumber >= 5) xfact = xnumber - 4;
   else xfact = xnumber - 6;
   if (xfact > 0) xBinNumber = xfact*numx;
   if (xfact < 0) xBinNumber = (Int_t) ((-1)*numx/xfact+0.5);
   if (xBinNumber < 1) xBinNumber = 1;
   if (xBinNumber > 1000) xBinNumber= 1000;
   if (fBinXNumberEntry1->GetNumber()!=xBinNumber)
      fBinXNumberEntry1->SetIntNumber(xBinNumber);
 
   if (ynumber >= 5) yfact = ynumber - 4;
   else yfact = ynumber - 6;
   if (yfact > 0) yBinNumber = yfact*numy;
   if (yfact < 0) yBinNumber = (Int_t) ((-1)*numy/yfact+0.5);
   if (yBinNumber < 1) yBinNumber = 1;
   if (yBinNumber > 1000) yBinNumber= 1000;
   if (fBinYNumberEntry1->GetNumber()!=yBinNumber)
      fBinYNumberEntry1->SetIntNumber(yBinNumber);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the Bin Number Entry for the Rebin.
 
void TH2Editor::DoBinLabel1()
{
   if (fAvoidSignal) return;
   Double_t oldXOffset = fXOffsetNumberEntry->GetNumber();
   Int_t numx = (Int_t)fBinXNumberEntry1->GetNumber();
   Double_t oldYOffset = fYOffsetNumberEntry->GetNumber();
   Int_t numy = (Int_t)fBinYNumberEntry1->GetNumber();
   TAxis* xaxis = fHist->GetXaxis();
   TAxis* yaxis = fHist->GetYaxis();
   TTreePlayer *player = (TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer();
   if (!player) return;
   Int_t firstx = xaxis->GetFirst();
   Int_t lastx = xaxis->GetLast();
   Int_t firsty = yaxis->GetFirst();
   Int_t lasty = yaxis->GetLast();
   Int_t nx = xaxis->GetNbins();
   Int_t ny = yaxis->GetNbins();
   Double_t minx = xaxis->GetBinLowEdge(1);         // overall min in user coords
   Double_t maxx = xaxis->GetBinUpEdge(nx);         // overall max in user coords
   Double_t miny = yaxis->GetBinLowEdge(1);         // overall min in user coords
   Double_t maxy = yaxis->GetBinUpEdge(ny);         // overall max in user coords
   Double_t rminx = xaxis->GetBinLowEdge(firstx);   // recent min in user coords
   Double_t rmaxx = xaxis->GetBinUpEdge(lastx);     // recent max in user coords
   Double_t rminy = yaxis->GetBinLowEdge(firsty);   // recent min in user coords
   Double_t rmaxy = yaxis->GetBinUpEdge(lasty);     // recent max in user coords
 
   ((TH2*)player->GetHistogram())->SetCanExtend(TH1::kNoAxis);
   ((TH2*)player->GetHistogram())->Reset();
 
   // Calculate the new number of bins in the complete range
   Int_t xBinNumber = (Int_t) ((maxx-minx)/(rmaxx - rminx)*numx + 0.5);
   if (xBinNumber < 1) xBinNumber = 1;
   if (xBinNumber > 1000) xBinNumber= 1000;
   Double_t xOffset = 1.*(fXBinOffsetSld->GetPosition())/100*(maxx-minx)/xBinNumber;
   Int_t yBinNumber = (Int_t) ((maxy-miny)/(rmaxy - rminy)*numy + 0.5);
   if (yBinNumber < 1) yBinNumber = 1;
   if (yBinNumber > 1000) yBinNumber= 1000;
   Double_t yOffset = 1.*(fYBinOffsetSld->GetPosition())/100*(maxy-miny)/yBinNumber;
   // create new histogram - the main job is done by sel->TakeAction()
   ((TH2*)player->GetHistogram())->SetBins(xBinNumber, minx-oldXOffset+xOffset,
                                           maxx-oldXOffset+xOffset,
                                           yBinNumber, miny-oldYOffset+yOffset,
                                           maxy-oldYOffset+yOffset);
   TSelectorDraw *sel = (TSelectorDraw*)player->GetSelector();
   if (!sel) return;
   sel->TakeAction();
 
   // Restore and set all the attributes which were changed by TakeAction()
   fHist = (TH2*)((TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer())->GetHistogram();
   fSliderX->SetRange(1,xBinNumber);
   fSliderY->SetRange(1,yBinNumber);
   Double_t xBinWidth = xaxis->GetBinWidth(1);
   Double_t yBinWidth = yaxis->GetBinWidth(1);
   fSliderX->SetPosition(xaxis->FindBin(rminx+xBinWidth/2),
                         xaxis->FindBin(rmaxx-xBinWidth/2));
   fSliderY->SetPosition(yaxis->FindBin(rminy+yBinWidth/2),
                         yaxis->FindBin(rmaxy-yBinWidth/2));
   xOffset = 1.*fXBinOffsetSld->GetPosition()/100*xBinWidth; //nesessary ??
   yOffset = 1.*fYBinOffsetSld->GetPosition()/100*yBinWidth; //nesessary ??
 
   // SetRange in BinNumbers along x and y!
   xaxis->SetRange(xaxis->FindBin(rminx+xBinWidth/2),
                   xaxis->FindBin(rmaxx-xBinWidth/2));
   yaxis->SetRange(yaxis->FindBin(rminy+yBinWidth/2),
                   yaxis->FindBin(rmaxy-yBinWidth/2));
   fSldXMin->SetNumber(xaxis->GetBinLowEdge(xaxis->GetFirst()));
   fSldXMax->SetNumber(xaxis->GetBinUpEdge(xaxis->GetLast()));
   fSldYMin->SetNumber(yaxis->GetBinLowEdge(yaxis->GetFirst()));
   fSldYMax->SetNumber(yaxis->GetBinUpEdge(yaxis->GetLast()));
   fXOffsetNumberEntry->SetNumber(xOffset);
   fXOffsetNumberEntry->SetLimits(TGNumberFormat::kNELLimitMinMax,0,xBinWidth);
   fYOffsetNumberEntry->SetNumber(yOffset);
   fYOffsetNumberEntry->SetLimits(TGNumberFormat::kNELLimitMinMax,0,yBinWidth);
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the OffSetSlider. It saves the OldBinOffset
/// (nessesary for delay draw mode).
 
void TH2Editor::DoOffsetPressed()
{
   if (fAvoidSignal) return;
   fOldXOffset = fXOffsetNumberEntry->GetNumber();
   fOldYOffset = fYOffsetNumberEntry->GetNumber();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the OffSetSlider that
/// changes the origin of the histogram inbetween a binwidth;
/// rebin the histogram with the new Offset given by the slider.
/// problem: histogram with variable binwidth??
 
void TH2Editor::DoOffsetReleased()
{
   if (fAvoidSignal) return;
   if (fDelaydraw->GetState()==kButtonDown){
      Int_t numx = (Int_t)fXBinOffsetSld->GetPosition();
      Int_t numy = (Int_t)fYBinOffsetSld->GetPosition();
      TAxis* xaxis = fHist->GetXaxis();
      TAxis* yaxis = fHist->GetYaxis();
      Double_t xBinWidth = xaxis->GetBinWidth(1);
      Double_t yBinWidth = yaxis->GetBinWidth(1);
      Double_t xOffset =  1.*numx/100*xBinWidth;
      Double_t yOffset =  1.*numy/100*yBinWidth;
      Double_t oldXOffset = fOldXOffset;
      Double_t oldYOffset = fOldYOffset;
      Int_t nx = xaxis->GetNbins();
      Int_t ny = yaxis->GetNbins();
 
      TTreePlayer *player = (TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer();
      if (!player) return;
 
      Int_t firstx = xaxis->GetFirst();
      Int_t lastx = xaxis->GetLast();
      Int_t firsty = yaxis->GetFirst();
      Int_t lasty = yaxis->GetLast();
      Double_t minx = xaxis->GetBinLowEdge(1);       // overall min in user coords
      Double_t maxx = xaxis->GetBinUpEdge(nx);       // overall max in user coords
      Double_t miny = yaxis->GetBinLowEdge(1);       // overall min in user coords
      Double_t maxy = yaxis->GetBinUpEdge(ny);       // overall max in user coords
      Double_t rminx = xaxis->GetBinLowEdge(firstx); // recent min in user coords
      Double_t rmaxx = xaxis->GetBinUpEdge(lastx);   // recent max in user coords
      Double_t rminy = yaxis->GetBinLowEdge(firsty); // recent min in user coords
      Double_t rmaxy = yaxis->GetBinUpEdge(lasty);   // recent max in user coords
 
      ((TH2*)player->GetHistogram())->SetCanExtend(TH1::kNoAxis);
      ((TH2*)player->GetHistogram())->Reset();
 
      ((TH2*)player->GetHistogram())->SetBins(nx, minx-oldXOffset+xOffset,
                                              maxx-oldXOffset+xOffset,
                                              ny, miny-oldYOffset+yOffset,
                                              maxy-oldYOffset+yOffset);
      TSelectorDraw *sel = (TSelectorDraw*)player->GetSelector();
      if (!sel) return;
      sel->TakeAction();
 
      // Restore all the attributes which were changed by TakeAction()
      fHist = (TH2*)((TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer())->GetHistogram();
 
      // SetRange in BinNumbers along x and y!
      xaxis->SetRange(xaxis->FindBin(rminx+xOffset-oldXOffset+xBinWidth/2),
                      xaxis->FindBin(rmaxx+xOffset-oldXOffset-xBinWidth/2));
      yaxis->SetRange(yaxis->FindBin(rminy+yOffset-oldYOffset+yBinWidth/2),
                      yaxis->FindBin(rmaxy+yOffset-oldYOffset-yBinWidth/2));
      fSldXMin->SetNumber(xaxis->GetBinLowEdge(xaxis->GetFirst()));
      fSldXMax->SetNumber(xaxis->GetBinUpEdge(xaxis->GetLast()));
      fSldYMin->SetNumber(yaxis->GetBinLowEdge(yaxis->GetFirst()));
      fSldYMax->SetNumber(yaxis->GetBinUpEdge(yaxis->GetLast()));
      fXOffsetNumberEntry->SetNumber(xOffset);
      fYOffsetNumberEntry->SetNumber(yOffset);
      Update();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the OffSetSlider.
/// It changes the origin of the histogram inbetween a binwidth;
/// rebin the histogram with the new offset given by the slider.
/// problem: histogram with variable binwidth??
 
void TH2Editor::DoOffsetMoved()
{
   if (fAvoidSignal) return;
   Int_t numx = (Int_t)fXBinOffsetSld->GetPosition();
   Int_t numy = (Int_t)fYBinOffsetSld->GetPosition();
   TAxis* xaxis = fHist->GetXaxis();
   TAxis* yaxis = fHist->GetYaxis();
   Double_t xBinWidth = xaxis->GetBinWidth(1);
   Double_t yBinWidth = yaxis->GetBinWidth(1);
   Double_t xOffset =  1.*numx/100*xBinWidth;
   Double_t yOffset =  1.*numy/100*yBinWidth;
   if (fDelaydraw->GetState()==kButtonUp){
      Double_t oldXOffset = fXOffsetNumberEntry->GetNumber();
      Double_t oldYOffset = fYOffsetNumberEntry->GetNumber();
      Int_t nx = xaxis->GetNbins();
      Int_t ny = yaxis->GetNbins();
 
      TTreePlayer *player = (TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer();
      if (!player) return;
 
      Int_t firstx = xaxis->GetFirst();
      Int_t lastx = xaxis->GetLast();
      Int_t firsty = yaxis->GetFirst();
      Int_t lasty = yaxis->GetLast();
      Double_t minx = xaxis->GetBinLowEdge(1);       // overall min in user coords
      Double_t maxx = xaxis->GetBinUpEdge(nx);       // overall max in user coords
      Double_t miny = yaxis->GetBinLowEdge(1);       // overall min in user coords
      Double_t maxy = yaxis->GetBinUpEdge(ny);       // overall max in user coords
      Double_t rminx = xaxis->GetBinLowEdge(firstx); // recent min in user coords
      Double_t rmaxx = xaxis->GetBinUpEdge(lastx);   // recent max in user coords
      Double_t rminy = yaxis->GetBinLowEdge(firsty); // recent min in user coords
      Double_t rmaxy = yaxis->GetBinUpEdge(lasty);   // recent max in user coords
 
      ((TH2*)player->GetHistogram())->SetCanExtend(TH1::kNoAxis);
      ((TH2*)player->GetHistogram())->Reset();
 
      ((TH2*)player->GetHistogram())->SetBins(nx,minx-oldXOffset+xOffset,
                                              maxx-oldXOffset+xOffset,
                                              ny, miny-oldYOffset+yOffset,
                                              maxy-oldYOffset+yOffset);
      TSelectorDraw *sel = (TSelectorDraw*)player->GetSelector();
      if (!sel) return;
      sel->TakeAction();
 
      // Restore all the attributes which were changed by TakeAction()
      fHist = (TH2*)((TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer())->GetHistogram();
 
      // SetRange in BinNumbers along x and y!
      xaxis->SetRange(xaxis->FindBin(rminx+xOffset-oldXOffset+xBinWidth/2),
                      xaxis->FindBin(rmaxx+xOffset-oldXOffset-xBinWidth/2));
      yaxis->SetRange(yaxis->FindBin(rminy+yOffset-oldYOffset+yBinWidth/2),
                      yaxis->FindBin(rmaxy+yOffset-oldYOffset-yBinWidth/2));
      fSldXMin->SetNumber(xaxis->GetBinLowEdge(xaxis->GetFirst()));
      fSldXMax->SetNumber(xaxis->GetBinUpEdge(xaxis->GetLast()));
      fSldYMin->SetNumber(yaxis->GetBinLowEdge(yaxis->GetFirst()));
      fSldYMax->SetNumber(yaxis->GetBinUpEdge(yaxis->GetLast()));
      fClient->NeedRedraw(fXBinOffsetSld, kTRUE);
      fClient->NeedRedraw(fYBinOffsetSld, kTRUE);
      Update();
   }
   fXOffsetNumberEntry->SetNumber(xOffset);
   fYOffsetNumberEntry->SetNumber(yOffset);
   fClient->NeedRedraw(fXOffsetNumberEntry, kTRUE);
   fClient->NeedRedraw(fYOffsetNumberEntry, kTRUE);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the OffSetNumberEntry, related to the OffSetSlider
/// changes the origin of the histogram inbetween a binwidth.
 
void TH2Editor::DoBinOffset()
{
   if (fAvoidSignal) return;
   TAxis* xaxis = fHist->GetXaxis();
   TAxis* yaxis = fHist->GetYaxis();
   Double_t xBinWidth = xaxis->GetBinWidth(1);
   Double_t yBinWidth = yaxis->GetBinWidth(1);
   Double_t xOffset =  fXOffsetNumberEntry->GetNumber();
   Double_t oldXOffset = 1.*fXBinOffsetSld->GetPosition()/100*xBinWidth;
   Double_t yOffset =  fYOffsetNumberEntry->GetNumber();
   Double_t oldYOffset = 1.*fYBinOffsetSld->GetPosition()/100*yBinWidth;
   Int_t nx = xaxis->GetNbins();
   Int_t ny = yaxis->GetNbins();
   TTreePlayer *player = (TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer();
   if (!player) return;
   Int_t firstx = xaxis->GetFirst();
   Int_t lastx = xaxis->GetLast();
   Int_t firsty = yaxis->GetFirst();
   Int_t lasty = yaxis->GetLast();
   Double_t minx = xaxis->GetBinLowEdge(1);        // overall min in user coords
   Double_t maxx = xaxis->GetBinUpEdge(nx);        // overall max in user coords
   Double_t miny = yaxis->GetBinLowEdge(1);        // overall min in user coords
   Double_t maxy = yaxis->GetBinUpEdge(ny);        // overall max in user coords
   Double_t rminx = xaxis->GetBinLowEdge(firstx);  // recent min in user coords
   Double_t rmaxx = xaxis->GetBinUpEdge(lastx);    // recent max in user coords
   Double_t rminy = yaxis->GetBinLowEdge(firsty);  // recent min in user coords
   Double_t rmaxy = yaxis->GetBinUpEdge(lasty);    // recent max in user coords
 
   ((TH2*)player->GetHistogram())->SetCanExtend(TH1::kNoAxis);
   ((TH2*)player->GetHistogram())->Reset();
 
   ((TH2*)player->GetHistogram())->SetBins(nx,minx+xOffset-oldXOffset,
                                           maxx+xOffset-oldXOffset,
                                           ny,miny+yOffset-oldYOffset,
                                           maxy+yOffset-oldYOffset);
   TSelectorDraw *sel = (TSelectorDraw*)player->GetSelector();
   if (!sel) return;
   sel->TakeAction();
 
   // Restore all the attributes which were changed by TakeAction()
   fHist = (TH2*)((TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer())->GetHistogram();
 
   // SetRange in BinNumbers along x and y!
   xaxis->SetRange(xaxis->FindBin(rminx+xOffset-oldXOffset+xBinWidth/2),
                   xaxis->FindBin(rmaxx+xOffset-oldXOffset-xBinWidth/2));
   yaxis->SetRange(yaxis->FindBin(rminy+yOffset-oldYOffset+yBinWidth/2),
                   yaxis->FindBin(rmaxy+yOffset-oldYOffset-yBinWidth/2));
   fSldXMin->SetNumber(xaxis->GetBinLowEdge(xaxis->GetFirst()));
   fSldXMax->SetNumber(xaxis->GetBinUpEdge(xaxis->GetLast()));
   fXBinOffsetSld->SetPosition((Int_t)(xOffset/xBinWidth*100));
   fSldYMin->SetNumber(yaxis->GetBinLowEdge(yaxis->GetFirst()));
   fSldYMax->SetNumber(yaxis->GetBinUpEdge(yaxis->GetLast()));
   fYBinOffsetSld->SetPosition((Int_t)(yOffset/yBinWidth*100));
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the x-Slider that redraws the histogram
/// with the new slider range.
 
void TH2Editor::DoSliderXMoved()
{
   if (fAvoidSignal) return;
   TAxis* xaxis = fHist->GetXaxis();
   if (fDelaydraw->GetState()==kButtonDown && fDim->GetState()==kButtonDown) {
      // 2D plot
      Int_t px1,py1,px2,py2;
      Float_t ymin,ymax,xleft,xright;
      xleft = xaxis->GetBinLowEdge((Int_t)((fSliderX->GetMinPosition())+0.5));
      xright =  xaxis->GetBinUpEdge((Int_t)((fSliderX->GetMaxPosition())+0.5));
      ymin  = fGedEditor->GetPad()->GetUymin();
      ymax  = fGedEditor->GetPad()->GetUymax();
      px1   = fGedEditor->GetPad()->XtoAbsPixel(xleft);
      py1   = fGedEditor->GetPad()->YtoAbsPixel(ymin);
      px2   = fGedEditor->GetPad()->XtoAbsPixel(xright);
      py2   = fGedEditor->GetPad()->YtoAbsPixel(ymax);
      if (fGedEditor->GetPad()->GetCanvas())
         fGedEditor->GetPad()->GetCanvas()->FeedbackMode(kTRUE);
      fGedEditor->GetPad()->cd();
      fGedEditor->GetPad()->SetLineWidth(1);
      fGedEditor->GetPad()->SetLineColor(2);
      gVirtualX->DrawBox(fPx1old, fPy1old, fPx2old, fPy2old, TVirtualX::kHollow);
      gVirtualX->DrawBox(px1, py1, px2, py2, TVirtualX::kHollow);
      fPx1old = px1;
      fPy1old = py1;
      fPx2old = px2 ;
      fPy2old = py2;
      gVirtualX->Update(0);
      fSldXMin->SetNumber(xleft);
      fSldXMax->SetNumber(xright);
   }  else  if (fDelaydraw->GetState()==kButtonDown &&
                fDim0->GetState()==kButtonDown &&
                fCoordsCombo->GetSelected()==kCOORDS_CAR) {
      // 3D plot
      Float_t p1[3], p2[3], p3[3], p4[3], p5[3], p6[3], p7[3], p8[3];
      if (fGedEditor->GetPad()->GetCanvas())
         fGedEditor->GetPad()->GetCanvas()->FeedbackMode(kTRUE);
      fGedEditor->GetPad()->cd();
      TView *fView = fGedEditor->GetPad()->GetView();
      if (!fView) return;
      Double_t *rmin = fView->GetRmin();
      if (!rmin) return;
      Double_t *rmax = fView->GetRmax();
      if (!rmax) return;
      p1[0] = p4[0] = p5[0] = p8[0] =
            xaxis->GetBinLowEdge((Int_t)((fSliderX->GetMinPosition())+0.5));
      p2[0] = p3[0] = p6[0] = p7[0] =
            xaxis->GetBinUpEdge((Int_t)((fSliderX->GetMaxPosition())+0.5));
      p1[1] = p2[1] = p3[1] = p4[1] = rmin[1];
      p5[1] = p6[1] = p7[1] = p8[1] = rmax[1];
      p1[2] = p2[2] = p5[2] = p6[2] = rmin[2];
      p3[2] = p4[2] = p7[2] = p8[2] = rmax[2];
      fGedEditor->GetPad()->SetLineWidth(1);
      fGedEditor->GetPad()->SetLineColor(2);
      PaintBox3D(fP2oldx, fP3oldx, fP7oldx, fP6oldx);
      PaintBox3D(fP1oldx, fP4oldx, fP8oldx, fP5oldx);
      PaintBox3D(p2, p3, p7, p6);
      PaintBox3D(p1, p4, p8, p5);
      for (Int_t i = 0; i<3; i++){
         fP1oldx[i] = p1[i];
         fP2oldx[i] = p2[i];
         fP3oldx[i] = p3[i];
         fP4oldx[i] = p4[i];
         fP5oldx[i] = p5[i];
         fP6oldx[i] = p6[i];
         fP7oldx[i] = p7[i];
         fP8oldx[i] = p8[i];
      }
      fSldXMin->SetNumber(p1[0]);
      fSldXMax->SetNumber(p2[0]);
   } else  if (fDelaydraw->GetState()==kButtonDown &&
               fDim0->GetState()==kButtonDown) {
      fSldXMin->SetNumber(xaxis->GetBinLowEdge((Int_t)((fSliderX->GetMinPosition())+0.5)));
      fSldXMax->SetNumber(xaxis->GetBinUpEdge((Int_t)((fSliderX->GetMaxPosition())+0.5)));
   } else {
      fHist->GetXaxis()->SetRange((Int_t)((fSliderX->GetMinPosition())+0.5),
                                  (Int_t)((fSliderX->GetMaxPosition())+0.5));
      fSldXMin->SetNumber(xaxis->GetBinLowEdge(xaxis->GetFirst()));
      fSldXMax->SetNumber(xaxis->GetBinUpEdge(xaxis->GetLast()));
      fClient->NeedRedraw(fSliderX,kTRUE);
      Update();
   }
   fClient->NeedRedraw(fSldXMin,kTRUE);
   fClient->NeedRedraw(fSldXMax,kTRUE);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the x axis range slider that initialises
/// the "virtual" box which is drawn in delay draw mode.
 
void TH2Editor::DoSliderXPressed()
{
   if (fAvoidSignal) return;
   TAxis* xaxis = fHist->GetXaxis();
   Float_t ymin,ymax,xleft,xright;
   if (fDelaydraw->GetState()==kButtonDown && fDim->GetState()==kButtonDown) {
      // 2D Plot
      if (!fGedEditor->GetPad()) return;
      fGedEditor->GetPad()->cd();
      if (fGedEditor->GetPad()->GetCanvas())
         fGedEditor->GetPad()->GetCanvas()->FeedbackMode(kFALSE);
      fGedEditor->GetPad()->SetLineWidth(1);
      fGedEditor->GetPad()->SetLineColor(2);
      xleft  = xaxis->GetBinLowEdge((Int_t)((fSliderX->GetMinPosition())+0.5));
      xright =  xaxis->GetBinUpEdge((Int_t)((fSliderX->GetMaxPosition())+0.5));
      ymin  = fGedEditor->GetPad()->GetUymin();
      ymax  = fGedEditor->GetPad()->GetUymax();
      fPx1old = fGedEditor->GetPad()->XtoAbsPixel(xleft);
      fPy1old = fGedEditor->GetPad()->YtoAbsPixel(ymin);
      fPx2old = fGedEditor->GetPad()->XtoAbsPixel(xright);
      fPy2old = fGedEditor->GetPad()->YtoAbsPixel(ymax);
      gVirtualX->DrawBox(fPx1old, fPy1old, fPx2old, fPy2old, TVirtualX::kHollow);
   } else if (fDelaydraw->GetState()==kButtonDown &&
              fDim0->GetState()==kButtonDown &&
              fCoordsCombo->GetSelected()==kCOORDS_CAR) {
      // 3D plot
      if (!fGedEditor->GetPad()) return;
      fGedEditor->GetPad()->cd();
      TView *fView = fGedEditor->GetPad()->GetView();
      if (!fView) return;
      Double_t *rmin = fView->GetRmin();
      if (!rmin) return;
      Double_t *rmax = fView->GetRmax();
      if (!rmax) return;
      fP1oldx[0] = fP4oldx[0] = fP5oldx[0] = fP8oldx[0] =
                 xaxis->GetBinLowEdge((Int_t)((fSliderX->GetMinPosition())+0.5));
      fP2oldx[0] = fP3oldx[0] = fP6oldx[0] = fP7oldx[0] =
                 xaxis->GetBinUpEdge((Int_t)((fSliderX->GetMaxPosition())+0.5));
      fP1oldx[1] = fP2oldx[1] = fP3oldx[1] = fP4oldx[1] = rmin[1];
      fP5oldx[1] = fP6oldx[1] = fP7oldx[1] = fP8oldx[1] = rmax[1];
      fP1oldx[2] = fP2oldx[2] = fP5oldx[2] = fP6oldx[2] = rmin[2];
      fP3oldx[2] = fP4oldx[2] = fP7oldx[2] = fP8oldx[2] = rmax[2];
      if (fGedEditor->GetPad()->GetCanvas())
         fGedEditor->GetPad()->GetCanvas()->FeedbackMode(kTRUE);
      fGedEditor->GetPad()->SetLineWidth(1);
      fGedEditor->GetPad()->SetLineColor(2);
      PaintBox3D(fP2oldx, fP3oldx, fP7oldx, fP6oldx);
      PaintBox3D(fP1oldx, fP4oldx, fP8oldx, fP5oldx);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the x-axis slider finalizing values after
/// the slider movement.
 
void TH2Editor::DoSliderXReleased()
{
   if (fAvoidSignal) return;
   if (fDelaydraw->GetState()==kButtonDown) {
      fHist->GetXaxis()->SetRange((Int_t)((fSliderX->GetMinPosition())+0.5),
                                  (Int_t)((fSliderX->GetMaxPosition())+0.5));
      fSldXMin->SetNumber(fHist->GetXaxis()->GetBinLowEdge(fHist->GetXaxis()->GetFirst()));
      fSldXMax->SetNumber(fHist->GetXaxis()->GetBinUpEdge(fHist->GetXaxis()->GetLast()));
      Update();
   }
   TTreePlayer *player = (TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer();
   if (player) if (player->GetHistogram() == fHist) {
      Int_t last = fHist->GetXaxis()->GetLast();
      Int_t first = fHist->GetXaxis()->GetFirst();
      fBinXNumberEntry1->SetIntNumber(last-first+1);
      Update();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the Max/Min number entry fields showing x-axis range.
 
void TH2Editor::DoXAxisRange()
{
   TAxis* xaxis = fHist->GetXaxis();
   Int_t nx = xaxis->GetNbins();
   Double_t width = xaxis->GetBinWidth(1);
   if ((fSldXMin->GetNumber()+width/2) < (xaxis->GetBinLowEdge(1)))
      fSldXMin->SetNumber(xaxis->GetBinLowEdge(1));
   if ((fSldXMax->GetNumber()-width/2) > (xaxis->GetBinUpEdge(nx)))
      fSldXMax->SetNumber(xaxis->GetBinUpEdge(nx));
   xaxis->SetRangeUser(fSldXMin->GetNumber()+width/2,
                       fSldXMax->GetNumber()-width/2);
   Int_t nxbinmin = xaxis->GetFirst();
   Int_t nxbinmax = xaxis->GetLast();
   fSliderX->SetPosition((Double_t)(nxbinmin),(Double_t)(nxbinmax));
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the x-slider for redrawing the
/// histogram with the new slider Range (immediately).
 
void TH2Editor::DoSliderYMoved()
{
   if (fAvoidSignal) return;
   TAxis* yaxis = fHist->GetYaxis();
   if (fDelaydraw->GetState()==kButtonDown && fDim->GetState()==kButtonDown) {
      Int_t px1,py1,px2,py2;
      Float_t xmin,xmax,ybottom,ytop;
      ybottom = yaxis->GetBinLowEdge((Int_t)((fSliderY->GetMinPosition())+0.5));
      ytop = yaxis->GetBinUpEdge((Int_t)((fSliderY->GetMaxPosition())+0.5));
      xmin = fGedEditor->GetPad()->GetUxmin();
      xmax = fGedEditor->GetPad()->GetUxmax();
      px1  = fGedEditor->GetPad()->XtoAbsPixel(xmin);
      py1  = fGedEditor->GetPad()->YtoAbsPixel(ybottom);
      px2  = fGedEditor->GetPad()->XtoAbsPixel(xmax);
      py2  = fGedEditor->GetPad()->YtoAbsPixel(ytop);
      if (fGedEditor->GetPad()->GetCanvas())
         fGedEditor->GetPad()->GetCanvas()->FeedbackMode(kTRUE);
      fGedEditor->GetPad()->cd();
      fGedEditor->GetPad()->SetLineWidth(1);
      fGedEditor->GetPad()->SetLineColor(2);
      gVirtualX->DrawBox(fPx1old, fPy1old, fPx2old, fPy2old, TVirtualX::kHollow);
      gVirtualX->DrawBox(px1, py1, px2, py2, TVirtualX::kHollow);
      fPx1old = px1;
      fPy1old = py1;
      fPx2old = px2 ;
      fPy2old = py2;
      gVirtualX->Update(0);
      fSldYMin->SetNumber(ybottom);
      fSldYMax->SetNumber(ytop);
   } else if (fDelaydraw->GetState()==kButtonDown &&
              fDim0->GetState()==kButtonDown &&
              fCoordsCombo->GetSelected()==kCOORDS_CAR) {
      // 3D plot
      Float_t p1[3], p2[3], p3[3], p4[3], p5[3], p6[3], p7[3], p8[3];
      if (fGedEditor->GetPad()->GetCanvas())
         fGedEditor->GetPad()->GetCanvas()->FeedbackMode(kTRUE);
      fGedEditor->GetPad()->cd();
      TView *fView = fGedEditor->GetPad()->GetView();
      if (!fView) return;
      Double_t *rmin = fView->GetRmin();
      if (!rmin) return;
      Double_t *rmax = fView->GetRmax();
      if (!rmax) return;
      p1[0] = p2[0] = p3[0] = p4[0] = rmin[0];
      p5[0] = p6[0] = p7[0] = p8[0] = rmax[0];
      p1[1] = p4[1] = p5[1] = p8[1] =
            yaxis->GetBinLowEdge((Int_t)((fSliderY->GetMinPosition())+0.5));
      p2[1] = p3[1] = p6[1] = p7[1] =
            yaxis->GetBinUpEdge((Int_t)((fSliderY->GetMaxPosition())+0.5));
      p1[2] = p2[2] = p5[2] = p6[2] = rmin[2];
      p3[2] = p4[2] = p7[2] = p8[2] = rmax[2];
      fGedEditor->GetPad()->SetLineWidth(1);
      fGedEditor->GetPad()->SetLineColor(2);
      PaintBox3D(fP2oldy, fP3oldy, fP7oldy, fP6oldy);
      PaintBox3D(fP1oldy, fP4oldy, fP8oldy, fP5oldy);
      PaintBox3D(p2, p3, p7, p6);
      PaintBox3D(p1, p4, p8, p5);
      for (Int_t i = 0; i<3; i++) {
         fP1oldy[i] = p1[i];
         fP2oldy[i] = p2[i];
         fP3oldy[i] = p3[i];
         fP4oldy[i] = p4[i];
         fP5oldy[i] = p5[i];
         fP6oldy[i] = p6[i];
         fP7oldy[i] = p7[i];
         fP8oldy[i] = p8[i];
      }
      fSldYMin->SetNumber(p1[1]);
      fSldYMax->SetNumber(p2[1]);
   } else if (fDelaydraw->GetState()==kButtonDown &&
              fDim0->GetState()==kButtonDown) {
      fSldYMin->SetNumber(yaxis->GetBinLowEdge((Int_t)((fSliderY->GetMinPosition())+0.5)));
      fSldYMax->SetNumber(yaxis->GetBinUpEdge((Int_t)((fSliderY->GetMaxPosition())+0.5)));
   } else {
      yaxis->SetRange((Int_t)((fSliderY->GetMinPosition())+0.5),
                      (Int_t)((fSliderY->GetMaxPosition())+0.5));
      fSldYMin->SetNumber(yaxis->GetBinLowEdge(yaxis->GetFirst()));
      fSldYMax->SetNumber(yaxis->GetBinUpEdge(yaxis->GetLast()));
      fClient->NeedRedraw(fSliderY,kTRUE);
      Update();
   }
   fClient->NeedRedraw(fSldYMin,kTRUE);
   fClient->NeedRedraw(fSldYMax,kTRUE);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to y-axis slider which initialises
/// the "virtual" box which is drawn in delay draw mode.
 
void TH2Editor::DoSliderYPressed()
{
   if (fAvoidSignal) return;
   TAxis* yaxis = fHist->GetYaxis();
   Float_t xmin,xmax,ytop,ybottom;
   if (fDelaydraw->GetState()==kButtonDown && fDim->GetState()==kButtonDown) {
      // 2D plot:
      if (!fGedEditor->GetPad()) return;
      fGedEditor->GetPad()->cd();
      if (fGedEditor->GetPad()->GetCanvas())
         fGedEditor->GetPad()->GetCanvas()->FeedbackMode(kFALSE);
      fGedEditor->GetPad()->SetLineWidth(1);
      fGedEditor->GetPad()->SetLineColor(2);
      ybottom = yaxis->GetBinLowEdge((Int_t)((fSliderY->GetMinPosition())+0.5));
      ytop =  yaxis->GetBinUpEdge((Int_t)((fSliderY->GetMaxPosition())+0.5));
      xmin  = fGedEditor->GetPad()->GetUxmin();
      xmax  = fGedEditor->GetPad()->GetUxmax();
      fPx1old   = fGedEditor->GetPad()->XtoAbsPixel(xmin);
      fPy1old   = fGedEditor->GetPad()->YtoAbsPixel(ybottom);
      fPx2old   = fGedEditor->GetPad()->XtoAbsPixel(xmax);
      fPy2old   = fGedEditor->GetPad()->YtoAbsPixel(ytop);
      gVirtualX->DrawBox(fPx1old, fPy1old, fPx2old, fPy2old, TVirtualX::kHollow);
   }  else if (fDelaydraw->GetState()==kButtonDown &&
               fDim0->GetState()==kButtonDown &&
               fCoordsCombo->GetSelected()==kCOORDS_CAR) {
      // 3D plot
      if (!fGedEditor->GetPad()) return;
      fGedEditor->GetPad()->cd();
      TView *fView = fGedEditor->GetPad()->GetView();
      if (!fView) return;
      Double_t *rmin = fView->GetRmin();
      if (!rmin) return;
      Double_t *rmax = fView->GetRmax();
      if (!rmax) return;
      fP1oldy[0] = fP2oldy[0] = fP3oldy[0] = fP4oldy[0] = rmin[0];
      fP5oldy[0] = fP6oldy[0] = fP7oldy[0] = fP8oldy[0] = rmax[0];
      fP1oldy[1] = fP4oldy[1] = fP5oldy[1] = fP8oldy[1] =
                 yaxis->GetBinLowEdge((Int_t)((fSliderY->GetMinPosition())+0.5));
      fP2oldy[1] = fP3oldy[1] = fP6oldy[1] = fP7oldy[1] =
                 yaxis->GetBinUpEdge((Int_t)((fSliderY->GetMaxPosition())+0.5));
      fP1oldy[2] = fP2oldy[2] = fP5oldy[2] = fP6oldy[2] = rmin[2];
      fP3oldy[2] = fP4oldy[2] = fP7oldy[2] = fP8oldy[2] = rmax[2];
      if (fGedEditor->GetPad()->GetCanvas())
         fGedEditor->GetPad()->GetCanvas()->FeedbackMode(kTRUE);
      fGedEditor->GetPad()->SetLineWidth(1);
      fGedEditor->GetPad()->SetLineColor(2);
      PaintBox3D(fP2oldy, fP3oldy, fP7oldy, fP6oldy);
      PaintBox3D(fP1oldy, fP4oldy, fP8oldy, fP5oldy);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the y-axis slider finalizing values after
/// the slider movement.
 
void TH2Editor::DoSliderYReleased()
{
   if (fAvoidSignal) return;
   if (fDelaydraw->GetState()==kButtonDown) {
      fHist->GetYaxis()->SetRange((Int_t)((fSliderY->GetMinPosition())+0.5),
                                  (Int_t)((fSliderY->GetMaxPosition())+0.5));
      fSldYMin->SetNumber(fHist->GetYaxis()->GetBinLowEdge(fHist->GetYaxis()->GetFirst()));
      fSldYMax->SetNumber(fHist->GetYaxis()->GetBinUpEdge(fHist->GetYaxis()->GetLast()));
      Update();
   }
 
   TTreePlayer *player = (TTreePlayer*)TVirtualTreePlayer::GetCurrentPlayer();
   if (player) if (player->GetHistogram() == fHist) {
      Int_t last = fHist->GetYaxis()->GetLast();
      Int_t first = fHist->GetYaxis()->GetFirst();
      fBinYNumberEntry1->SetIntNumber(last-first+1);
      Update();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the Max/Min number entry fields showing y-axis range.
 
void TH2Editor::DoYAxisRange()
{
   if (fAvoidSignal) return;
   TAxis* yaxis = fHist->GetYaxis();
   Int_t ny = yaxis->GetNbins();
   Double_t width = yaxis->GetBinWidth(1);
 
   if ((fSldYMin->GetNumber()+width/2) < (yaxis->GetBinLowEdge(1)))
      fSldYMin->SetNumber(yaxis->GetBinLowEdge(1));
   if ((fSldYMax->GetNumber()-width/2) > (yaxis->GetBinUpEdge(ny)))
      fSldYMax->SetNumber(yaxis->GetBinUpEdge(ny));
 
   yaxis->SetRangeUser(fSldYMin->GetNumber()+width/2,
                       fSldYMax->GetNumber()-width/2);
   Int_t nybinmin = yaxis -> GetFirst();
   Int_t nybinmax = yaxis -> GetLast();
   fSliderY->SetPosition((Double_t)(nybinmin),(Double_t)(nybinmax));
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the fill area color.
 
void TH2Editor::DoFillColor(Pixel_t color)
{
   if (fAvoidSignal || !fGedEditor->GetPad()) return;
   fGedEditor->GetPad()->cd();
   fGedEditor->GetPad()->SetFrameFillColor(TColor::GetColor(color));
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Slot connected to the fill area pattern.
 
void TH2Editor::DoFillPattern(Style_t pattern)
{
   if (fAvoidSignal || !fGedEditor->GetPad()) return;
   fGedEditor->GetPad()->cd();
   fGedEditor->GetPad()->SetFrameFillStyle(pattern);
   Update();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Return the immediate histogram type (HIST, LEGO1-4, SURF1-5).
 
TString TH2Editor::GetHistTypeLabel()
{
   TString s="";
   switch (fTypeCombo->GetSelected()){
      case (-1)         : {s = ""; break;}
      case (kTYPE_LEGO ): {s = "LEGO"; break;}
      case (kTYPE_LEGO1): {s = "LEGO1"; break;}
      case (kTYPE_LEGO2): {s = "LEGO2"; break;}
      case (kTYPE_LEGO3): {s = "LEGO3"; break;}
      case (kTYPE_LEGO4): {s = "LEGO4"; break;}
      case (kTYPE_SURF ): {s = "SURF";  break;}
      case (kTYPE_SURF1): {s = "SURF1"; break;}
      case (kTYPE_SURF2): {s = "SURF2"; break;}
      case (kTYPE_SURF3): {s = "SURF3"; break;}
      case (kTYPE_SURF4): {s = "SURF4"; break;}
      case (kTYPE_SURF5): {s = "SURF5"; break;}
      default:  break;
   }
   return s;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Return the immediate coordinate system of the histogram.
/// (POL, CYL, SPH,PSR)
 
TString TH2Editor::GetHistCoordsLabel()
{
   TString s="";
   switch (fCoordsCombo->GetSelected()){
      case (-1)         : {s = ""; break;}
      case (kCOORDS_CAR): {s = ""; break;}
      case (kCOORDS_POL): {s = "POL"; break;}
      case (kCOORDS_CYL): {s = "CYL"; break;}
      case (kCOORDS_SPH): {s = "SPH"; break;}
      case (kCOORDS_PSR): {s = "PSR"; break;}
      default:  break;
   }
   return s;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Returns histogram contour option (None,Cont0..5).
 
TString TH2Editor::GetHistContLabel()
{
   TString s="";
   switch (fContCombo->GetSelected()){
      case (-1)         : {s = ""; break;}
      case (kCONT_NONE) : {s = ""; break;}
      case (kCONT_0)    : {s = "CONT0"; break;}
      case (kCONT_1)    : {s = "CONT1"; break;}
      case (kCONT_2)    : {s = "CONT2"; break;}
      case (kCONT_3)    : {s = "CONT3"; break;}
      case (kCONT_4)    : {s = "CONT4"; break;}
      default:  break;
   }
   return s;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Return histogram additive options (Arr,Box,Col,Scat,Col,Text,E,Z,FB,BB).
 
TString TH2Editor::GetHistAdditiveLabel()
{
   TString s="";
   if (fDim->GetState()==kButtonDown) {
      if (fAddArr->GetState()==kButtonDown) s+="ARR";
      if (fAddBox->GetState()==kButtonDown) s+="BOX";
      if (fAddCol->GetState()==kButtonDown) s+="COL";
      if (fAddScat->GetState()==kButtonDown) s+="SCAT";
      if (fAddText->GetState()==kButtonDown) s+="TEXT";
      if (fAddPalette->GetState()==kButtonDown) s+="Z";
   } else if (fDim0->GetState()==kButtonDown){
      if (fAddPalette1->GetState()==kButtonDown) s+="Z";
      if (fAddError->GetState()==kButtonDown) s+="E";
      if (fAddFB->GetState()==kButtonUp) s+="FB";
      if (fAddBB->GetState()==kButtonUp) s+="BB";
   }
   return s;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Return draw option string related to graphical cut in use.
 
TString TH2Editor::GetCutOptionString()
{
   TString cutopt = " ";
   TString opt = GetDrawOption();
   Int_t scut = opt.First('[');
   if (scut != -1) {
      Int_t ecut = opt.First(']');
      cutopt += opt(scut,ecut);
   }
   return cutopt;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create histogram type combo box.
 
TGComboBox* TH2Editor::BuildHistTypeComboBox(TGFrame* parent, Int_t id)
{
   TGComboBox *c = new TGComboBox(parent, id);
 
   c->AddEntry("Lego" , kTYPE_LEGO);
   c->AddEntry("Lego1", kTYPE_LEGO1);
   c->AddEntry("Lego2", kTYPE_LEGO2);
   c->AddEntry("Lego3", kTYPE_LEGO3);
   c->AddEntry("Lego4", kTYPE_LEGO4);
   c->AddEntry("Surf" , kTYPE_SURF);
   c->AddEntry("Surf1", kTYPE_SURF1);
   c->AddEntry("Surf2", kTYPE_SURF2);
   c->AddEntry("Surf3", kTYPE_SURF3);
   c->AddEntry("Surf4", kTYPE_SURF4);
   c->AddEntry("Surf5", kTYPE_SURF5);
 
   return c;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create coordinate system combo box.
 
TGComboBox* TH2Editor::BuildHistCoordsComboBox(TGFrame* parent, Int_t id)
{
   TGComboBox *c = new TGComboBox(parent, id);
 
   c->AddEntry("Cartesian", kCOORDS_CAR);
   c->AddEntry("Cylindric", kCOORDS_CYL);
   c->AddEntry("Polar", kCOORDS_POL);
   c->AddEntry("Rapidity", kCOORDS_PSR);
   c->AddEntry("Spheric", kCOORDS_SPH);
   TGListBox* lb = c->GetListBox();
   lb->Resize(lb->GetWidth(), 83);
 
   return c;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create contour combo box.
 
TGComboBox* TH2Editor::BuildHistContComboBox(TGFrame* parent, Int_t id)
{
   TGComboBox *c = new TGComboBox(parent, id);
 
   c->AddEntry("None" , kCONT_NONE);
   c->AddEntry("Cont0", kCONT_0);
   c->AddEntry("Cont1", kCONT_1);
   c->AddEntry("Cont2", kCONT_2);
   c->AddEntry("Cont3", kCONT_3);
   c->AddEntry("Cont4", kCONT_4);
 
   return c;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Paint a square in 3D.
 
void TH2Editor::PaintBox3D(Float_t *p1, Float_t *p2,Float_t *p3, Float_t *p4)
{
   fGedEditor->GetPad()->PaintLine3D(p1, p2);
   fGedEditor->GetPad()->PaintLine3D(p2, p3);
   fGedEditor->GetPad()->PaintLine3D(p3, p4);
   fGedEditor->GetPad()->PaintLine3D(p4, p1);
}
////////////////////////////////////////////////////////////////////////////////
/// Give an array of dividers of n (without the trivial divider n))
/// in the first entry the number of dividers is saved.
 
Int_t* TH2Editor::Dividers(Int_t n)
{
   Int_t* div;
   if (n <= 0) {
      div = new Int_t[1];
      div[0]=0;
   } else if (n == 1) {
      div = new Int_t[2];
      div[0]=div[1]=1;
   } else {
      div = new Int_t[(Int_t) n/2+2];
      div[0]=0;
      div[1]=1;
 
      Int_t num = 1;
      for (Int_t i=2; i <= n/2; i++) {
         if (n % i == 0) {
            num++;
            div[num] = i;
         }
      }
      num++;
      div[num]=n;
      div[0] = num;
   }
   return div;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Skip TH1Editor in building list of editors.
 
void TH2Editor::ActivateBaseClassEditors(TClass* /*cl*/)
{
   fGedEditor->ActivateEditors(TH1::Class()->GetListOfBases(), kTRUE);
}
 
////////////////////////////////////////////////////////////////////////////////
/// If the contained histogram obj is deleted we must set its pointer to zero
 
void TH2Editor::RecursiveRemove(TObject* obj)
{
   if (obj == fHist) {
      fHist = 0;
   }
}