Add custom stats and palette test to stressGraphics

To be sure that such modifications reliably works

Author: linev

test/CMakeLists.txt

@@ -162,7 +162,7 @@ ROOT_ADD_TEST(test-stresslinear-interpreted COMMAND ${ROOT_root_CMD} -b -q -l ${
 
 #--stressGraphics------------------------------------------------------------------------------------
 if(ROOT_opengl_FOUND AND TARGET TreeViewer)
-  ROOT_EXECUTABLE(stressGraphics stressGraphics.cxx LIBRARIES Graf Gpad Postscript TreeViewer)
+  ROOT_EXECUTABLE(stressGraphics stressGraphics.cxx LIBRARIES Graf Gpad Postscript TreeViewer HistPainter)
   if(MSVC)
     set_property(TARGET stressGraphics APPEND_STRING PROPERTY LINK_FLAGS "/STACK:4000000")
   endif()

test/stressGraphics.cxx

@@ -89,6 +89,7 @@
 #include "TAnnotation.h"
 #include "TRatioPlot.h"
 #include "TGaxis.h"
+#include "TPaletteAxis.h"
 #include "TSpline.h"
 #include "TPolyMarker.h"
 #include "TScatter.h"
@@ -2082,6 +2083,54 @@ void th2_custom_axis_labels()
 }
 
 
+////////////////////////////////////////////////////////////////////////////////
+/// Test editing of stats and palette attributes
+
+void th2_stats_palette_edit()
+{
+   auto C = StartTest(600, 600);
+
+   gStyle->SetOptStat();
+
+   auto hist = new TH2F("th2_stats_palette", "Modify histogram stats and palette", 40, -4, 4, 40, -20, 20);
+   TRandom3 rnr;
+
+   float px, py;
+   for (int i = 0; i < 25000; i++) {
+      rnr.Rannor(px,py);
+      hist->Fill(px,5*py);
+   }
+
+   C->SetRightMargin(0.18);
+   auto palette = new TPaletteAxis(4.3, -18, 4.8, 10, hist);
+   hist->GetListOfFunctions()->Add(palette);
+
+   C->Add(hist, "colz");
+
+   C->Update();
+
+   TPaveStats *ps = (TPaveStats*)C->GetPrimitive("stats");
+   ps->SetName("mystats");
+   TList *listOfLines = ps->GetListOfLines();
+
+   // Remove the RMS line
+   while (auto tconst = ps->GetLineWith("Dev"))
+      listOfLines->Remove(tconst);
+
+   // Add a new line in the stat box.
+   // Note that "=" is a control character
+   TLatex *myt = new TLatex(0,0, "Test = 10");
+   myt ->SetTextFont(42);
+   myt ->SetTextSize(0.04);
+   myt ->SetTextColor(kRed);
+   listOfLines->Add(myt);
+
+   // the following line is needed to avoid that the automatic redrawing of stats
+   hist->SetStats(0);
+
+   TestReport(C, "TH2 with modified palette and stats", "", 0, "th2_stats_palette_edit");
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 /// TEllipse test.
 
@@ -4360,6 +4409,7 @@ void stressGraphics(Int_t verbose = 0, Bool_t generate = kFALSE, Bool_t keep_fil
    th2_candle    ();
    th2_violin    ();
    th2_custom_axis_labels();
+   th2_stats_palette_edit();
    tellipse      ();
    feynman       ();
    ratioplot     ();

test/stressGraphics.ref

@@ -33,6 +33,7 @@ Test#   PS1Ref#   PS1Err#   PDFRef#   PDFErr#   JPGRef#   JPGErr#   PNGRef#   PN
    23    113353      1000     71394       500    136880     40000     51345     20000    115314      1000
    23     73316       500     84161       500     85037     20000     34733     15000     73223       500
    24      4878       600     14375       100     17419      5000     11709      1800      5770       600
+   24     27107       300     19227       300     30587     14000     16531      7000     27039       500
    25      4131        40     15272       100     34038      2500     12258      1400      4162        40
    26      7813       300     23840       150     11085      6000      6973      3100      8081       300
    27     19418       150     21141       300     14104     14800      7386      2800     14493       150

test/stressGraphics_builtinzlib.ref

@@ -33,6 +33,7 @@ Test#   PS1Ref#   PS1Err#   PDFRef#   PDFErr#   JPGRef#   JPGErr#   PNGRef#   PN
    23    113353      1000     71394       500    136880     40000     51345     20000    115314      1000
    23     73316       500     84161       500     85037     20000     34733     15000     73223       500
    24      4878       600     14375       100     17419      5000     11709      1800      5770       600
+   24     27107       300     19227       300     30587     14000     16531      7000     27039       500
    25      4130        40     15193        50     34790      2500     12156      1400      4161        40
    26      7825       300     23672       100     11087      6000      7008      3100      8097       300
    27     19420       150     21350       300     13257     14800      6444      2800     14424       150

test/stressGraphics_web.ref

@@ -33,6 +33,7 @@ Test#   SVG1Ref#  SVG1Err#  PDFRef#   PDFErr#   JPGRef#   JPGErr#   PNGRef#   PN
    23     85700       200    196500      1500    375000    120000    138091     30000     85800       200
    23     42606       100    112200      1500    220000     70000     78079     20000     42622       100
    24      5830        50     10700       400     42000     10000     35922     11000      5850       100
+   24     15010        50     34603       500     84000     25000     40859     15000     15010        50
    25      2572        50      9271        50    109238     42213     49000     17000      2572        50
    26     16403        50     25282        50     25505      3408     23000      8000     16403        50
    27     23949       118     26549       349     27746      3988     17000      4000     19192       112