StripHist.cxx

Go to the documentation of this file.

#include "StripHist.h"

#include <TGraph.h>
#include <TH1D.h>

using namespace std;

StripHist::StripHist(const char* name, const char* title)
    : fStrip(new TGraph)
    , fHist(new TH1D)
    , fStripRange(0)
    , fMaxStripEntries(0)
    , fYtitle("")
{
    fStrip->SetName(Form("%s Strip Chart",name));
    fStrip->SetTitle(title);
    fHist->SetName(Form("%s Histogram",name));
    fHist->SetTitle(title);
}

StripHist::StripHist(const char* name, const char* title,
                     int nbin, double minbin, double maxbin)
    : fStrip(new TGraph)
    , fHist(new TH1D(Form("%s Histogram",name),title,nbin,minbin,maxbin))
    , fStripRange(0)
    , fMaxStripEntries(0)
{
    fStrip->SetName(Form("%s Strip Chart",name));
    fStrip->SetTitle(title);
}

void StripHist::SetLineColor(int color)
{
    if(color >=0 && color <= 50) fStrip->SetLineColor(color);
}

void StripHist::Draw(Option_t* option)
{
    TVirtualPad* pad = gPad, *oldpad = gPad;

    pad->Divide(1,2);
    pad->cd(1);
    fHist->Draw();
    pad->cd(2);
    fStrip->Draw(option);
    oldpad->cd();
}

void StripHist::DrawStrip(Option_t* option)
{
    TVirtualPad* pad = gPad, *oldpad = gPad;

    pad->cd();
    fStrip->Draw(option);
    oldpad->cd();
}

void StripHist::DrawHist(Option_t* option)
{
    TVirtualPad* pad = gPad, *oldpad = gPad;
  
    pad->cd();
    fHist->Draw(option);
    oldpad->cd();
}

void StripHist::Fill(double x, double y, double histweight)
{
    fHist->Fill(y,histweight);

    if (fStripRange>0) {
        for (int n = fStrip->GetN(); 
             n > 2 && fStrip->GetX()[n-1]-fStrip->GetX()[0] > fStripRange;
             n = fStrip->GetN()) {
            fStrip->RemovePoint(0);
        }
    }

    if (fMaxStripEntries) {
        
        for (int n = fStrip->GetN(); n > fMaxStripEntries; n = fStrip->GetN()) {
            fStrip->RemovePoint(0);
        }
    }

    fStrip->SetPoint(fStrip->GetN(),x,y);
    
    // Evidently this crap needs to be done each update.  Sigh.

    TH1F* frame = fStrip->GetHistogram();
    TAxis* axis = frame->GetXaxis();
    axis->SetTimeDisplay(1);
    axis->SetTimeFormat("%b %d %H:%M:%S %Z");
    axis->SetNdivisions(202,false);
    axis->SetAxisColor(2);
    TH1F* frame2 = fStrip->GetHistogram();
    TAxis* axis2 = frame2->GetYaxis();
    axis2->SetTitle(fYtitle.c_str());
    axis2->CenterTitle();

}

void StripHist::SetGraphYTitle(const char* title)
{
    fYtitle = title;
}

void StripHist::SetStripRange(double range)
{
    fStripRange = range;
}
void StripHist::SetMaxStripEntries(int max)
{
    fMaxStripEntries = max;
}

void StripHist::Reset() 
{
    fHist->Reset();
    for(int i=0; i<fStrip->GetN(); i++) {
        fStrip->RemovePoint(i);
    }
}

double StripHist::GetMax()
{
    if(fStrip->GetN() == 0) return 0.0;
    double max = 0.0, x = 0.0, y = 0.0;
    for(int i=0; i<fStrip->GetN(); i++) {
        fStrip->GetPoint(i, x, y);
        if(y > max) max = y;
    }
    return max;
}

double StripHist::GetMin()
{
    if(fStrip->GetN() == 0) return 0.0;
    double max = this->GetMax();
    double min = max, x = 0.0, y = 0.0;
    for(int i=0; i<fStrip->GetN(); i++) {
        fStrip->GetPoint(i, x, y);
        if(y < min) min = y;
    }
    return min;
}

---