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- Implement the option X+ and Y+ for reverse axis on TGraph. #8131

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May 11, 2021
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- Implement the option X+ and Y+ for reverse axis on TGraph. #8131

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2 changes: 2 additions & 0 deletions README/ReleaseNotes/v626/index.md
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Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,8 @@ From now on, the likelihoods are normalized by the sum of integrals in each rang

## 2D Graphics Libraries

- Implement the option `X+` and `Y+` for reverse axis on TGraph.


## 3D Graphics Libraries

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20 changes: 14 additions & 6 deletions hist/histpainter/src/TGraphPainter.cxx
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Expand Up @@ -3992,8 +3992,10 @@ void TGraphPainter::PaintGraphReverse(TGraph *theGraph, Option_t *option)

Bool_t lrx = opt.Contains("rx");
Bool_t lry = opt.Contains("ry");
Bool_t lxp = opt.Contains("x+");
Bool_t lyp = opt.Contains("y+");
Bool_t axis = opt.Contains("a");
opt.ReplaceAll("a", "");
opt.ReplaceAll("a", "0");

Double_t LOX = theHist->GetXaxis()->GetLabelOffset();
Double_t TLX = theHist->GetXaxis()->GetTickLength();
Expand All @@ -4013,7 +4015,7 @@ void TGraphPainter::PaintGraphReverse(TGraph *theGraph, Option_t *option)
theHist->GetYaxis()->SetLabelOffset(999.);
theHist->GetYaxis()->SetAxisColor(gPad->GetFrameFillColor());
}
theHist->Paint("0");
theHist->Paint(opt.Data());
}

Int_t N = theGraph->GetN();
Expand Down Expand Up @@ -4051,10 +4053,13 @@ void TGraphPainter::PaintGraphReverse(TGraph *theGraph, Option_t *option)
GL = (YA2 - YA1) / (gPad->GetY2() - gPad->GetY1());
optax.Append("W");
}
Double_t ypos;
if (lxp) ypos = gPad->GetUymax();
else ypos = gPad->GetUymin();
auto *theNewAxis = new TGaxis(gPad->GetUxmax(),
gPad->GetUymin(),
ypos,
gPad->GetUxmin(),
gPad->GetUymin(),
ypos,
theGraph->GetXaxis()->GetXmin(),
theGraph->GetXaxis()->GetXmax(),
theHist->GetNdivisions("X"),
Expand Down Expand Up @@ -4084,9 +4089,12 @@ void TGraphPainter::PaintGraphReverse(TGraph *theGraph, Option_t *option)
GL = (XA2 - XA1) / (gPad->GetX2() - gPad->GetX1());
optax.Append("W");
}
auto *theNewAxis = new TGaxis(gPad->GetUxmin(),
Double_t xpos;
if (lyp) xpos = gPad->GetUxmax();
else xpos = gPad->GetUxmin();
auto *theNewAxis = new TGaxis(xpos,
gPad->GetUymax(),
gPad->GetUxmin(),
xpos,
gPad->GetUymin(),
theGraph->GetYaxis()->GetXmin(),
theGraph->GetYaxis()->GetXmax(),
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