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void tvdemo() {
printf("This demo show how to handle TTreeViewer sessions\n");
printf("Compile class Event from test directory before running this\n");
printf("- use arrow buttons from bottom to cycle records ...\n");
printf("- make new expressions and drag them to X, Y, Z or Cut items ...\n");
printf("- use the Draw button to check your current selection ...\n");
printf("- click the record button once you are happy with this ...\n");
printf("- open the TV context menu (right-click on the right panel)...\n");
printf(" Use : RemoveLastRecord() - to remove last record :-)\n");
printf(" SetRecordName() - to name current record\n");
printf(" UpdateRecord() - if you want to change a record from the list\n");
printf(" with your new X, Y, Z, Cut configuration.\n");
printf(" Best luck !\n");
open_session();
}
open_session(void *p = 0) {
//=========Macro generated by ROOT version3.00/00
//=========for tree "T" (Wed Feb 21 14:16:23 2001)
//===This macro can be opened from a TreeViewer session after loading
//===the corresponding tree
gSystem->Load("libTreeViewer");
TTreeViewer *treeview = (TTreeViewer *) p;
if (!treeview) treeview = new TTreeViewer();
TTree *tv_tree = (TTree*)gROOT->FindObject("T");
TFile *tv_file = (TFile*)gROOT->GetListOfFiles()->FindObject("Event.root");
if (!tv_tree) {
if (!tv_file) tv_file = new TFile("$ROOTSYS/test/Event.root");
if (tv_file) tv_tree = (TTree*)tv_file->Get("T");
if(!tv_tree) {
printf("Tree %s not found", fTree->GetName());
return;
}
}
treeview->SetTreeName("T");
treeview->SetNexpressions(10);
// Set expressions on axis and cut
TTVLVEntry *item;
// X expression
item = treeview->ExpressionItem(0);
item->SetExpression("fTemperature", "fTemperature");
// Y expression
item = treeview->ExpressionItem(1);
item->SetExpression("", "-empty-");
// Z expression
item = treeview->ExpressionItem(2);
item->SetExpression("", "-empty-");
// Cut expression
item = treeview->ExpressionItem(3);
item->SetExpression("", "-empty-");
// Scan list
item = treeview->ExpressionItem(4);
item->SetExpression("", "Scan box");
// User defined expressions
item = treeview->ExpressionItem(5);
item->SetExpression("sqrt(fTracks.fPx*fTracks.fPx+fTracks.fPy*fTracks.fPy)", "~Pt", kFALSE);
item = treeview->ExpressionItem(6);
item->SetExpression("fTracks.fPx>0", "~Cut1", kTRUE);
item = treeview->ExpressionItem(7);
item->SetExpression("", "-empty-", kFALSE);
item = treeview->ExpressionItem(8);
item->SetExpression("", "-empty-", kFALSE);
item = treeview->ExpressionItem(9);
item->SetExpression("", "-empty-", kFALSE);
item = treeview->ExpressionItem(10);
item->SetExpression("", "-empty-", kFALSE);
item = treeview->ExpressionItem(11);
item->SetExpression("", "-empty-", kFALSE);
item = treeview->ExpressionItem(12);
item->SetExpression("", "-empty-", kFALSE);
item = treeview->ExpressionItem(13);
item->SetExpression("", "-empty-", kFALSE);
item = treeview->ExpressionItem(14);
item->SetExpression("", "-empty-", kFALSE);
//--- session object
tv_session = new TTVSession(treeview);
treeview->SetSession(tv_session);
//--- tree viewer record
tv_record = tv_session->AddRecord(kTRUE);
tv_session->SetRecordName("Temperature");
tv_record->fX = "fTemperature";
tv_record->fY = "";
tv_record->fZ = "";
tv_record->fCut = "";
tv_record->fXAlias = "fTemperature";
tv_record->fYAlias = "-empty-";
tv_record->fZAlias = "-empty-";
tv_record->fCutAlias = "-empty-";
tv_record->fOption = "lego1";
tv_record->fScanRedirected = kFALSE;
tv_record->fCutEnabled = kTRUE;
//--- tree viewer record
tv_record = tv_session->AddRecord(kTRUE);
tv_session->SetRecordName("Py versus Px");
tv_record->fX = "fTracks.fPx";
tv_record->fY = "fTracks.fPy";
tv_record->fZ = "";
tv_record->fCut = "";
tv_record->fXAlias = "fTracks.fPx";
tv_record->fYAlias = "fTracks.fPy";
tv_record->fZAlias = "-empty-";
tv_record->fCutAlias = "-empty-";
tv_record->fOption = "lego";
tv_record->fScanRedirected = kFALSE;
tv_record->fCutEnabled = kTRUE;
//--- tree viewer record
tv_record = tv_session->AddRecord(kTRUE);
tv_session->SetRecordName("Transverse momentum");
tv_record->fX = "sqrt(fTracks.fPx*fTracks.fPx+fTracks.fPy*fTracks.fPy)";
tv_record->fY = "";
tv_record->fZ = "";
tv_record->fCut = "fTracks.fPx>0";
tv_record->fXAlias = "~Pt";
tv_record->fYAlias = "-empty-";
tv_record->fZAlias = "-empty-";
tv_record->fCutAlias = "~Cut1";
tv_record->fOption = "";
tv_record->fScanRedirected = kFALSE;
tv_record->fCutEnabled = kTRUE;
//--- tree viewer record
tv_record = tv_session->AddRecord(kTRUE);
tv_session->SetRecordName("Surface plot of Py vs. Px");
tv_record->fX = "fTracks.fPx";
tv_record->fY = "fTracks.fPy";
tv_record->fZ = "";
tv_record->fCut = "";
tv_record->fXAlias = "fTracks.fPx";
tv_record->fYAlias = "fTracks.fPy";
tv_record->fZAlias = "-empty-";
tv_record->fCutAlias = "-empty-";
tv_record->fOption = "SURF";
tv_record->fScanRedirected = kFALSE;
tv_record->fCutEnabled = kTRUE;
//--- Show first record
tv_session->Show(tv_session->First());
}
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