HeaderDrawer.cxx

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#include "lareventdisplay/EventDisplay/HeaderDrawer.h"
#include "nuevdb/EventDisplayBase/EventHolder.h"
#include "nuevdb/EventDisplayBase/View2D.h"

#include "TText.h"
#include "TTimeStamp.h"

#include "art/Framework/Principal/Event.h"
#include "art/Framework/Services/Registry/ServiceHandle.h"
#include "lareventdisplay/EventDisplay/EvdLayoutOptions.h"

namespace evd {

  //......................................................................

  void HeaderDrawer::Header(evdb::View2D* view)
  {
    art::ServiceHandle<evd::EvdLayoutOptions const> layoutopt;

    TText& titlet = view->AddText(0.03, 0.80, layoutopt->fDisplayName.c_str());
    titlet.SetTextSize(0.13);
    titlet.SetTextFont(72);

    // get the event
    const art::Event* evt = evdb::EventHolder::Instance()->GetEvent();
    if (!evt) return;

    int run = evt->run();
    int srun = evt->subRun();
    int event = evt->id().event();

    unsigned int year, month, day, dayofweek;
    unsigned int hour, minute, second;
    int nano;

    // get the time stamp.  art::Timestamp::value() returns a TimeValue_t which is a typedef to unsigned long long.
    // The conventional use is for the upper 32 bits to have the seconds since 1970 epoch and the lower 32 bits to be
    // the number of microseconds with the current second.
    unsigned long long int tsval = evt->time().value();

    // taking it apart
    // the masking isn't strictly necessary *if* "long" is truly 32bits
    // but this can vary w/ compiler/platform
    const unsigned long int mask32 = 0xFFFFFFFFUL;
    unsigned long int lup = (tsval >> 32) & mask32;
    unsigned long int llo = tsval & mask32;
    TTimeStamp ts(lup, (int)llo);

    ts.GetDate(kTRUE, 0, &year, &month, &day);
    ts.GetTime(kTRUE, 0, &hour, &minute, &second);
    nano = ts.GetNanoSec();
    dayofweek = ts.GetDayOfWeek();
    char eventbuff[256];
    char runbuff[256];
    char datebuff[256];
    char timebuff[256];

    // Skip first one since ROOT returns these numbers starting from 1 not 0
    static const char* days[] = {"", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
    static const char* months[] = {
      "", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};

    sprintf(runbuff, "Run:   %d/%d", run, srun);
    sprintf(eventbuff, "Event: %d", event);
    sprintf(datebuff, "UTC %s %s %d, %d", days[dayofweek], months[month], day, year);
    sprintf(timebuff, "%.2d:%.2d:%2.9f", hour, minute, (float)second + (float)nano / 1.0E9);

    TText& runt = view->AddText(0.04, 0.60, runbuff);
    TText& eventt = view->AddText(0.04, 0.45, eventbuff);
    TText& datet = view->AddText(0.04, 0.25, datebuff);
    TText& timet = view->AddText(0.04, 0.10, timebuff);

    runt.SetTextSize(0.13);
    runt.SetTextFont(42);

    eventt.SetTextSize(0.13);
    eventt.SetTextFont(42);

    datet.SetTextSize(0.12);
    datet.SetTextFont(42);

    timet.SetTextSize(0.12);
    timet.SetTextFont(42);
  }

} // namespace