Make "LIST" draw option for contour plot work with "CONT1", "CONT2", and "CONT3" options #20858
Description
Feature description
Currently, only the draw option "CONT0 LIST" creates an entry in the list of specials containing the graphs of the drawn contours. However, this does not work if "LIST" is combined with "CONT1", "CONT2", or "CONT3", as illustrated by
void test (const std::string& drawOption)
{
TF2 fcn = TF2("fcn", "x", 0, 1, 0, 1);
TH1* hist = fcn.GetHistogram();
hist->SetContour(2);
hist->Draw((drawOption + "Z LIST").c_str());
gPad->Update();
if (gROOT->GetListOfSpecials()->Contains("contours")) {
std::cout << drawOption << ": found contours" << std::endl;
} else {
std::cout << drawOption << ": did not find contours" << std::endl;
}
gROOT->GetListOfSpecials()->ls();
}
void testContours()
{
// test("CONT0"); // this works
// these do not work:
test("CONT1");
test("CONT2");
test("CONT3");
}It would be desirable to make these options work as "CONT0".
Alternatives considered
No response
Additional context
No response