doc/v606/tree_8C.html

void tree() {

   TCanvas* c1 = new TCanvas("c1","Tree Data Structure",200,10,750,940);

   c1->Range(0,-0.1,1,1.15);


   gBenchmark->Start("tree");


   Int_t branchcolor = 26;

   Int_t leafcolor   = 30;

   Int_t basketcolor = 42;

   Int_t offsetcolor = 43;

   TPaveLabel* title = new TPaveLabel(.3,1.05,.8,1.13,c1->GetTitle());

   title->SetFillColor(16);

   title->Draw();

   TPaveText* treePave = new TPaveText(.01,.75,.15,1.00);

   treePave->SetFillColor(18);

   treePave->SetTextAlign(12);

   TText *tnt = treePave->AddText("Tree");

   tnt->SetTextAlign(22);

   tnt->SetTextSize(0.030);

   treePave->AddText("fScanField");

   treePave->AddText("fMaxEventLoop");

   treePave->AddText("fMaxVirtualSize");

   treePave->AddText("fEntries");

   treePave->AddText("fDimension");

   treePave->AddText("fSelectedRows");

   treePave->Draw();

   TPavesText* farm = new TPavesText(.01,1.02,.15,1.1,9,"tr");

   TText *tfarm = farm->AddText("CHAIN");

   tfarm->SetTextSize(0.024);

   farm->AddText("Collection");

   farm->AddText("of Trees");

   farm->Draw();

   TLine* llink = new TLine(.15,.92,.80,.92);

   llink->SetLineWidth(2);

   llink->SetLineColor(1);

   llink->Draw();

   llink->DrawLine(.21,.87,.21,.275);

   llink->DrawLine(.23,.87,.23,.375);

   llink->DrawLine(.25,.87,.25,.775);

   llink->DrawLine(.41,.25,.41,-.025);

   llink->DrawLine(.43,.25,.43,.075);

   llink->DrawLine(.45,.25,.45,.175);

   TPaveLabel* branch0 = new TPaveLabel(.20,.87,.35,.97,"Branch 0");

   branch0->SetTextSize(0.35);

   branch0->SetFillColor(branchcolor);

   branch0->Draw();

   TPaveLabel* branch1 = new TPaveLabel(.40,.87,.55,.97,"Branch 1");

   branch1->SetTextSize(0.35);

   branch1->SetFillColor(branchcolor);

   branch1->Draw();

   TPaveLabel* branch2 = new TPaveLabel(.60,.87,.75,.97,"Branch 2");

   branch2->SetTextSize(0.35);

   branch2->SetFillColor(branchcolor);

   branch2->Draw();

   TPaveLabel* branch3 = new TPaveLabel(.80,.87,.95,.97,"Branch 3");

   branch3->SetTextSize(0.35);

   branch3->SetFillColor(branchcolor);

   branch3->Draw();

   TPaveLabel* leaf0 = new TPaveLabel(.4,.75,.5,.8,"Leaf 0");

   leaf0->SetFillColor(leafcolor);

   leaf0->Draw();

   TPaveLabel* leaf1 = new TPaveLabel(.6,.75,.7,.8,"Leaf 1");

   leaf1->SetFillColor(leafcolor);

   leaf1->Draw();

   TPaveLabel* leaf2 = new TPaveLabel(.8,.75,.9,.8,"Leaf 2");

   leaf2->SetFillColor(leafcolor);

   leaf2->Draw();

   TPaveText* firstevent = new TPaveText(.4,.35,.9,.4);

   firstevent->AddText("First event of each basket");

   firstevent->AddText("Array of fMaxBaskets Integers");

   firstevent->SetFillColor(basketcolor);

   firstevent->Draw();

   TPaveLabel* basket0 = new TPaveLabel(.4,.25,.5,.3,"Basket 0");

   basket0->SetFillColor(basketcolor);

   basket0->Draw();

   TPaveLabel* basket1 = new TPaveLabel(.6,.25,.7,.3,"Basket 1");

   basket1->SetFillColor(basketcolor);

   basket1->Draw();

   TPaveLabel* basket2 = new TPaveLabel(.8,.25,.9,.3,"Basket 2");

   basket2->SetFillColor(basketcolor);

   basket2->Draw();


   TPaveText* offset = new TPaveText(.55,.15,.9,.2);

   offset->AddText("Offset of events in fBuffer");

   offset->AddText("Array of fEventOffsetLen Integers");

   offset->AddText("(if variable length structure)");

   offset->SetFillColor(offsetcolor);

   offset->Draw();

   TPaveText* buffer = new TPaveText(.55,.05,.9,.1);

   buffer->AddText("Basket buffer");

   buffer->AddText("Array of fBasketSize chars");

   buffer->SetFillColor(offsetcolor);

   buffer->Draw();

   TPaveText* zipbuffer = new TPaveText(.55,-.05,.75,.0);

   zipbuffer->AddText("Basket compressed buffer");

   zipbuffer->AddText("(if compression)");

   zipbuffer->SetFillColor(offsetcolor);

   zipbuffer->Draw();

   TArrow* ar1 = new TArrow();

   ar1->SetLineWidth(2);

   ar1->SetLineColor(1);

   ar1->SetFillStyle(1001);

   ar1->SetFillColor(1);

   ar1->DrawArrow(.21,.275,.39,.275,0.015,"|>");

   ar1->DrawArrow(.23,.375,.39,.375,0.015,"|>");

   ar1->DrawArrow(.25,.775,.39,.775,0.015,"|>");

   ar1->DrawArrow(.50,.775,.59,.775,0.015,"|>");

   ar1->DrawArrow(.70,.775,.79,.775,0.015,"|>");

   ar1->DrawArrow(.50,.275,.59,.275,0.015,"|>");

   ar1->DrawArrow(.70,.275,.79,.275,0.015,"|>");

   ar1->DrawArrow(.45,.175,.54,.175,0.015,"|>");

   ar1->DrawArrow(.43,.075,.54,.075,0.015,"|>");

   ar1->DrawArrow(.41,-.025,.54,-.025,0.015,"|>");

   TLine* ldot = new TLine(.95,.92,.99,.92);

   ldot->SetLineStyle(3);

   ldot->Draw();

   ldot->DrawLine(.9,.775,.99,.775);

   ldot->DrawLine(.9,.275,.99,.275);

   ldot->DrawLine(.55,.05,.55,0);

   ldot->DrawLine(.9,.05,.75,0);

   TText* pname = new TText(.46,.21,"fEventOffset");

   pname->SetTextFont(72);

   pname->SetTextSize(0.018);

   pname->Draw();

   pname->DrawText(.44,.11,"fBuffer");

   pname->DrawText(.42,.01,"fZipBuffer");

   pname->DrawText(.26,.81,"fLeaves = TObjArray of TLeaf");

   pname->DrawText(.24,.40,"fBasketEvent");

   pname->DrawText(.22,.31,"fBaskets = TObjArray of TBasket");

   pname->DrawText(.20,1.0,"fBranches = TObjArray of TBranch");

   TPaveText* ntleaf = new TPaveText(0.30,.42,.62,.7);

   ntleaf->SetTextSize(0.014);

   ntleaf->SetFillColor(leafcolor);

   ntleaf->SetTextAlign(12);

   ntleaf->AddText("fLen: number of fixed elements");

   ntleaf->AddText("fLenType: number of bytes of data type");

   ntleaf->AddText("fOffset: relative to Leaf0-fAddress");

   ntleaf->AddText("fNbytesIO: number of bytes used for I/O");

   ntleaf->AddText("fIsPointer: True if pointer");

   ntleaf->AddText("fIsRange: True if leaf has a range");

   ntleaf->AddText("fIsUnsigned: True if unsigned");

   ntleaf->AddText("*fLeafCount: points to Leaf counter");

   ntleaf->AddText(" ");

   ntleaf->AddLine(0,0,0,0);

   ntleaf->AddText("fName = Leaf name");

   ntleaf->AddText("fTitle = Leaf type (see Type codes)");

   ntleaf->Draw();

   TPaveText* type = new TPaveText(.65,.42,.95,.7);

   type->SetTextAlign(12);

   type->SetFillColor(leafcolor);

   type->AddText(" ");

   type->AddText("C : a character string");

   type->AddText("B : an 8 bit signed integer");

   type->AddText("b : an 8 bit unsigned integer");

   type->AddText("S : a 16 bit signed short integer");

   type->AddText("s : a 16 bit unsigned short integer");

   type->AddText("I : a 32 bit signed integer");

   type->AddText("i : a 32 bit unsigned integer");

   type->AddText("F : a 32 bit floating point");

   type->AddText("D : a 64 bit floating point");

   type->AddText("TXXXX : a class name TXXXX");

   type->Draw();

   TPaveLabel* typecode = new TPaveLabel(.7,.68,.9,.72,"fType codes");

   typecode->SetFillColor(leafcolor);

   typecode->Draw();

   ldot->DrawLine(.4,.75,.30,.7);

   ldot->DrawLine(.5,.75,.62,.7);

   TPaveText* ntbasket = new TPaveText(0.02,-0.07,0.35,.25);

   ntbasket->SetFillColor(basketcolor);

   ntbasket->SetTextSize(0.014);

   ntbasket->SetTextAlign(12);

   ntbasket->AddText("fNbytes: Size of compressed Basket");

   ntbasket->AddText("fObjLen: Size of uncompressed Basket");

   ntbasket->AddText("fDatime: Date/Time when written to store");

   ntbasket->AddText("fKeylen: Number of bytes for the key");

   ntbasket->AddText("fCycle : Cycle number");

   ntbasket->AddText("fSeekKey: Pointer to Basket on file");

   ntbasket->AddText("fSeekPdir: Pointer to directory on file");

   ntbasket->AddText("fClassName: 'TBasket'");

   ntbasket->AddText("fName: Branch name");

   ntbasket->AddText("fTitle: TreePave name");

   ntbasket->AddText(" ");

   ntbasket->AddLine(0,0,0,0);

   ntbasket->AddText("fNevBuf: Number of events in Basket");

   ntbasket->AddText("fLast: pointer to last used byte in Basket");

   ntbasket->Draw();

   ldot->DrawLine(.4,.3,0.02,0.25);

   ldot->DrawLine(.5,.25,0.35,-.07);

   ldot->DrawLine(.5,.3,0.35,0.25);

   TPaveText* ntbranch = new TPaveText(0.02,0.40,0.18,0.68);

   ntbranch->SetFillColor(branchcolor);

   ntbranch->SetTextSize(0.015);

   ntbranch->SetTextAlign(12);

   ntbranch->AddText("fBasketSize");

   ntbranch->AddText("fEventOffsetLen");

   ntbranch->AddText("fMaxBaskets");

   ntbranch->AddText("fEntries");

   ntbranch->AddText("fAddress of Leaf0");

   ntbranch->AddText(" ");

   ntbranch->AddLine(0,0,0,0);

   ntbranch->AddText("fName: Branchname");

   ntbranch->AddText("fTitle: leaflist");

   ntbranch->Draw();

   ldot->DrawLine(.2,.97,.02,.68);

   ldot->DrawLine(.35,.97,.18,.68);

   ldot->DrawLine(.35,.87,.18,.40);

   TPavesText* basketstore = new TPavesText(.8,-0.088,0.952,-0.0035,7,"tr");

   basketstore->SetFillColor(28);

   basketstore->AddText("Baskets");

   basketstore->AddText("Stores");

   basketstore->Draw();

   c1->Update();


   gBenchmark->Show("treePave");

}