void makePlot_legend(TLegend* legend, const std::string& outputFilePath, const std::string& outputFileName)
{
TCanvas* canvas_legend = new TCanvas("canvas_legend", "canvas_legend", 900, 800);
canvas_legend->SetFillColor(10);
canvas_legend->SetBorderSize(2);
canvas_legend->Draw();
canvas_legend->cd();
legend->SetX1NDC(0.30);
legend->SetY1NDC(0.30);
legend->SetX2NDC(0.80);
legend->SetY2NDC(0.80);
legend->SetTextSize(0.070);
legend->SetMargin(0.20);
TList* legend_primitives = legend->GetListOfPrimitives();
TIter legend_nextObj(legend_primitives);
while ( TObject* obj = legend_nextObj() ) {
std::string objName = "";
if ( dynamic_cast<TNamed*>(obj) ) objName = (dynamic_cast<TNamed*>(obj))->GetName();
//std::cout << "obj = " << obj << ": name = " << objName << ", type = " << obj->ClassName() << std::endl;
TLegendEntry* legendEntry = dynamic_cast<TLegendEntry*>(obj);
if ( legendEntry ) {
TH1* histogram = dynamic_cast<TH1*>(legendEntry->GetObject());
if ( histogram ) {
histogram->SetLineWidth(2*histogram->GetLineWidth());
histogram->SetMarkerSize(3);
}
}
}
legend->Draw();
canvas_legend->Update();
std::string outputFileName_full = Form("%s%s", outputFilePath.data(), outputFileName.data());
size_t idx = outputFileName_full.find_last_of('.');
std::string outputFileName_plot = std::string(outputFileName_full, 0, idx);
canvas_legend->Print(std::string(outputFileName_plot).append(".pdf").data());
canvas_legend->Print(std::string(outputFileName_plot).append(".root").data());
delete canvas_legend;
}
// A macro to print out a TLegend - can be considered a smarter TLegend::ls().
// If no TLegend pointer is passed, it loops over the TLegends drawn on current TPad.
void PrintLegend(TLegend *leg=0) {
if ( leg==0 ) {
if (gROOT->GetListOfCanvases()->GetEntries()==0) return;
TList *padprim = gPad->GetListOfPrimitives();
for (int i=0; i<padprim->GetEntries(); i++) {
TObject *myobj = gROOT->FindObject(padprim->At(i)->GetName());
if ( myobj != 0 && myobj->InheritsFrom("TLegend") )
PrintLegend((TLegend*)myobj); }
return;
}
TList *ents = leg->GetListOfPrimitives();
for (int i=0; i<ents->GetEntries(); i++) {
TLegendEntry *le = (TLegendEntry*)ents->At(i);
TString s( le->GetLabel() );
TObject *obj = le->GetObject();
if (!obj) continue; // if no object, this can be the title line, so skip
TString color = "???";
if ( obj->InheritsFrom("TH1") )
color = gROOT->GetListOfColors()->At(((TH1*)obj)->GetLineColor())->GetName();
cout << "Item "; cout.width(2); cout.fill('0'); cout << i << " plotted in ";
cout.width(7); cout.fill(' '); cout << color << " : " << s << endl;
}
//leg->ls();
}