GAGGPIDCutCreator.C can edit existing cuts

GAGGPIDCutCreator.C

@@ -12,20 +12,24 @@
 
 void GAGGPIDCutCreator(TString dataList, 
                        TString saveFileName = "GAGGPIDCuts.root", 
+                       int detID = -100, // -100 = new, -X = append from X, X = only X
                        int peakRange=1200, 
                        int tailRange=400, 
                        bool isLogz = false, 
-                       TString gate = "", 
-                       TString treeName = "tree"
+                       float frac = 0.3
                       ){
    
    printf("================ Graphic Cut Creator for GAGG ============== \n");
    
-   TChain * chain = new TChain(treeName);
+   TChain * chain = new TChain("tree");
    chain->Add(dataList);
    
    chain->GetListOfFiles()->Print();
    
+   Long64_t numEntries = chain->GetEntries();
+   
+   printf(" total number of entries : %llu, using the first %.0f%% data.\n", numEntries, frac*100.);
+   
    TString varX, varY, tag;
 
    gStyle->SetOptStat("neiou");
@@ -36,17 +40,54 @@ void GAGGPIDCutCreator(TString dataList,
    cCutCreator->Update();
    if( isLogz ) cCutCreator->cd()->SetLogz();
 
-   TCutG * cut = NULL;
-   TObjArray * cutList = new TObjArray();
-
-   TString expression;
-
+   TString expression, gate;
    TH2F * h[NGAGG];
 
-   int count = 0;
-   for (Int_t i = 0; i < NGAGG; i++) {
+   TFile * cutFile;
+   TCutG * cut = NULL;
+   TObjArray * cutList;
 
    
+   /// load the cutFile and load the cutList
+   
+
+   int startID = 0;
+   int stopID = NGAGG;
+
+   if( detID != -100 ) {
+      cutFile = new TFile(saveFileName, "UPDATE");
+      bool listExist = cutFile->GetListOfKeys()->Contains("cutList");
+      if( !listExist ) {
+         cutList = new TObjArray();
+      }else{
+         cutList = (TObjArray*) cutFile->FindObjectAny("cutList");
+         int numCut = cutList->GetLast()+1;
+         printf("----- found %d cuts \n", numCut);
+         for( int k = 0; k < numCut; k++){
+            if( cutList->At(k) != NULL ){
+               printf("found a cut at %2d \n", k);
+            }else{
+               printf("     No cut at %2d \n", k);
+            }
+         }
+      }
+      
+      if( detID < 0 ) startID = abs(detID);
+      if( detID >= 0 ){
+         startID = detID;
+         stopID = detID+1;
+      }
+      
+   }else{
+      cutFile = new TFile(saveFileName, "recreate");
+      cutList = new TObjArray();
+   }
+   printf("=================== plotting histogram, start at GAGG-%0d \n", startID);
+   
+   int count = 0;
+
+   for (Int_t i = startID; i < stopID; i++) {
+
       varX.Form("gaggT"); varY.Form("gaggP");
 
       h[i] = new TH2F(Form("h%d", i), Form("GAGG-%d",i), 500, 0, tailRange, 500, 0, peakRange);
@@ -54,7 +95,10 @@ void GAGGPIDCutCreator(TString dataList,
       expression.Form("%s:%s>>h%d", varY.Data(), varX.Data(),i);
       gate.Form("gaggID==%d", i);
 
-      chain->Draw(expression, gate, "col");
+      chain->Draw(expression, gate, "col", numEntries * frac);
+      
+      cut = (TCutG*) cutList->At(i);
+      cut->Draw("same");
       
       if( h[i]->Integral() < 1000 ) {
          h[i]->SetMarkerStyle(20);
@@ -62,7 +106,9 @@ void GAGGPIDCutCreator(TString dataList,
          h[i]->Draw("");
       }
 
-      printf("======== make a graphic cut on the plot (double click to stop), %d-th cut: ", i );
+      printf("======== make a graphic cut on the plot (double click to stop), %2d-th cut: ", i );
+
+      if( detID != -100 ) 
       
       cCutCreator->Modified(); cCutCreator->Update();
 
@@ -71,7 +117,7 @@ void GAGGPIDCutCreator(TString dataList,
       cut = (TCutG*) gROOT->FindObject("CUTG");
       
       if( cut == NULL ){
-         printf(" stopped by user. no file saved or changed. \n");
+         printf(" stopped by user.\n");
          break;
       }
 
@@ -81,17 +127,26 @@ void GAGGPIDCutCreator(TString dataList,
       cut->SetVarY(varY.Data());
       cut->SetTitle(tag);
       cut->SetLineColor(i+1);
-      cutList->Add(cut);
-
+      if( detID != -100 ){
+         cutList->AddAt(cut, abs(detID));
+      }else{
+         cutList->Add(cut);
+      }
       printf(" cut-%d \n", i);
               
       count ++;
    }
 
-   TFile * cutFile = new TFile(saveFileName, "recreate");
    cutList->Write("cutList", TObject::kSingleKey);
-   
-   printf("====> saved %d cuts into %s\n", count, saveFileName.Data());
+   if( detID == -100) {
+      printf("====> saved %d cuts into %s\n", count, saveFileName.Data());
+   }else{
+      if( detID < 0 ) {
+         printf("====> ReDo %d cuts into %s, from GAGG-%2d\n", count, saveFileName.Data(), startID);
+      }else{
+         printf("====> ReDo %d cuts into %s, GAGG-%2d\n", count, saveFileName.Data(), startID);
+      }
+   }
    gROOT->ProcessLine(".q");
 
 }