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tvdemo.C
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1 void open_session(void *p = 0) {
2 //=========Macro generated by ROOT version3.00/00
3 //=========for tree "T" (Wed Feb 21 14:16:23 2001)
4 //===This macro can be opened from a TreeViewer session after loading
5 //===the corresponding tree
6  TTreeViewer *treeview = (TTreeViewer *) p;
7  if (!treeview) treeview = new TTreeViewer();
8  TTree *tv_tree = (TTree*)gROOT->FindObject("T");
9  TFile *tv_file = (TFile*)gROOT->GetListOfFiles()->FindObject("Event.root");
10  if (!tv_tree) {
11  if (!tv_file) tv_file = new TFile("$ROOTSYS/test/Event.root");
12  if (tv_file) tv_tree = (TTree*)tv_file->Get("T");
13  if(!tv_tree) {
14  printf("Tree not found\n");
15  return;
16  }
17  }
18 
19  treeview->SetTreeName("T");
20  treeview->SetNexpressions(10);
21 // Set expressions on axis and cut
22  TTVLVEntry *item;
23 // X expression
24  item = treeview->ExpressionItem(0);
25  item->SetExpression("fTemperature", "fTemperature");
26 // Y expression
27  item = treeview->ExpressionItem(1);
28  item->SetExpression("", "-empty-");
29 // Z expression
30  item = treeview->ExpressionItem(2);
31  item->SetExpression("", "-empty-");
32 // Cut expression
33  item = treeview->ExpressionItem(3);
34  item->SetExpression("", "-empty-");
35 // Scan list
36  item = treeview->ExpressionItem(4);
37  item->SetExpression("", "Scan box");
38 // User defined expressions
39  item = treeview->ExpressionItem(5);
40  item->SetExpression("sqrt(fTracks.fPx*fTracks.fPx+fTracks.fPy*fTracks.fPy)", "~Pt", kFALSE);
41  item = treeview->ExpressionItem(6);
42  item->SetExpression("fTracks.fPx>0", "~Cut1", kTRUE);
43  item = treeview->ExpressionItem(7);
44  item->SetExpression("", "-empty-", kFALSE);
45  item = treeview->ExpressionItem(8);
46  item->SetExpression("", "-empty-", kFALSE);
47  item = treeview->ExpressionItem(9);
48  item->SetExpression("", "-empty-", kFALSE);
49  item = treeview->ExpressionItem(10);
50  item->SetExpression("", "-empty-", kFALSE);
51  item = treeview->ExpressionItem(11);
52  item->SetExpression("", "-empty-", kFALSE);
53  item = treeview->ExpressionItem(12);
54  item->SetExpression("", "-empty-", kFALSE);
55  item = treeview->ExpressionItem(13);
56  item->SetExpression("", "-empty-", kFALSE);
57  item = treeview->ExpressionItem(14);
58  item->SetExpression("", "-empty-", kFALSE);
59 //--- session object
60  auto tv_session = new TTVSession(treeview);
61  treeview->SetSession(tv_session);
62 //--- tree viewer record
63  auto tv_record = tv_session->AddRecord(kTRUE);
64  tv_session->SetRecordName("Temperature");
65  tv_record->fX = "fTemperature";
66  tv_record->fY = "";
67  tv_record->fZ = "";
68  tv_record->fCut = "";
69  tv_record->fXAlias = "fTemperature";
70  tv_record->fYAlias = "-empty-";
71  tv_record->fZAlias = "-empty-";
72  tv_record->fCutAlias = "-empty-";
73  tv_record->fOption = "lego1";
74  tv_record->fScanRedirected = kFALSE;
75  tv_record->fCutEnabled = kTRUE;
76 //--- tree viewer record
77  tv_record = tv_session->AddRecord(kTRUE);
78  tv_session->SetRecordName("Py versus Px");
79  tv_record->fX = "fTracks.fPx";
80  tv_record->fY = "fTracks.fPy";
81  tv_record->fZ = "";
82  tv_record->fCut = "";
83  tv_record->fXAlias = "fTracks.fPx";
84  tv_record->fYAlias = "fTracks.fPy";
85  tv_record->fZAlias = "-empty-";
86  tv_record->fCutAlias = "-empty-";
87  tv_record->fOption = "lego";
88  tv_record->fScanRedirected = kFALSE;
89  tv_record->fCutEnabled = kTRUE;
90 //--- tree viewer record
91  tv_record = tv_session->AddRecord(kTRUE);
92  tv_session->SetRecordName("Transverse momentum");
93  tv_record->fX = "sqrt(fTracks.fPx*fTracks.fPx+fTracks.fPy*fTracks.fPy)";
94  tv_record->fY = "";
95  tv_record->fZ = "";
96  tv_record->fCut = "fTracks.fPx>0";
97  tv_record->fXAlias = "~Pt";
98  tv_record->fYAlias = "-empty-";
99  tv_record->fZAlias = "-empty-";
100  tv_record->fCutAlias = "~Cut1";
101  tv_record->fOption = "";
102  tv_record->fScanRedirected = kFALSE;
103  tv_record->fCutEnabled = kTRUE;
104 //--- tree viewer record
105  tv_record = tv_session->AddRecord(kTRUE);
106  tv_session->SetRecordName("Surface plot of Py vs. Px");
107  tv_record->fX = "fTracks.fPx";
108  tv_record->fY = "fTracks.fPy";
109  tv_record->fZ = "";
110  tv_record->fCut = "";
111  tv_record->fXAlias = "fTracks.fPx";
112  tv_record->fYAlias = "fTracks.fPy";
113  tv_record->fZAlias = "-empty-";
114  tv_record->fCutAlias = "-empty-";
115  tv_record->fOption = "SURF";
116  tv_record->fScanRedirected = kFALSE;
117  tv_record->fCutEnabled = kTRUE;
118 //--- Show first record
119  tv_session->Show(tv_session->First());
120 }
121 
122 void tvdemo() {
123  printf("This demo show how to handle TTreeViewer sessions\n");
124  printf("Compile class Event from test directory before running this\n");
125  printf("- use arrow buttons from bottom to cycle records ...\n");
126  printf("- make new expressions and drag them to X, Y, Z or Cut items ...\n");
127  printf("- use the Draw button to check your current selection ...\n");
128  printf("- click the record button once you are happy with this ...\n");
129  printf("- open the TV context menu (right-click on the right panel)...\n");
130  printf(" Use : RemoveLastRecord() - to remove last record :-)\n");
131  printf(" SetRecordName() - to name current record\n");
132  printf(" UpdateRecord() - if you want to change a record from the list\n");
133  printf(" with your new X, Y, Z, Cut configuration.\n");
134  printf(" Best luck !\n");
135 
136  open_session();
137 }
TTVSession
I/O classes for TreeViewer session handling.
Definition: TTVSession.h:70
tvdemo
void tvdemo()
Definition: tvdemo.C:122
kTRUE
const Bool_t kTRUE
Definition: RtypesCore.h:91
TTreeViewer::SetTreeName
void SetTreeName(const char *treeName)
Allow geting the tree from the context menu.
Definition: TTreeViewer.cxx:516
TTree
A TTree represents a columnar dataset.
Definition: TTree.h:79
TTreeViewer
A graphic user interface designed to handle ROOT trees and to take advantage of TTree class features.
Definition: TTreeViewer.h:54
open_session
void open_session(void *p=0)
Definition: tvdemo.C:1
TDirectoryFile::Get
TObject * Get(const char *namecycle) override
Return pointer to object identified by namecycle.
Definition: TDirectoryFile.cxx:909
TTreeViewer::ExpressionItem
TTVLVEntry * ExpressionItem(Int_t index)
Get the item from a specific position.
Definition: TTreeViewer.cxx:1354
kFALSE
const Bool_t kFALSE
Definition: RtypesCore.h:92
TTreeViewer::SetSession
void SetSession(TTVSession *session)
Set current session.
Definition: TTreeViewer.cxx:1284
TFile
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format.
Definition: TFile.h:54
TTVLVEntry
This class represent entries that goes into the TreeViewer listview container.
Definition: TTVLVContainer.h:56
TTreeViewer::SetNexpressions
void SetNexpressions(Int_t expr)
Change the number of expression widgets.
Definition: TTreeViewer.cxx:452
TTVLVEntry::SetExpression
void SetExpression(const char *name, const char *alias, Bool_t cutType=kFALSE)
Set the true name, alias and type of the expression, then refresh it.
Definition: TTVLVContainer.cxx:244
gROOT
#define gROOT
Definition: TROOT.h:406