TEveElementIter Class Reference

#include <TEveElementIter.h>

Public Member Functions
TEveElement *	current ()
TEveElement *	next ()
TEveElement *	reset ()
unsigned int	size ()
	TEveElementIter (TEveElement *, const char *regular_expression=nullptr)

Private Member Functions
void	addElement (TEveElement *)

Private Attributes
std::vector< TEveElement * >	elements
std::vector< TEveElement * >::iterator	iter
TPRegexp	regexp

Detailed Description

Definition at line 15 of file TEveElementIter.h.

Constructor & Destructor Documentation

TEveElementIter()

TEveElementIter::TEveElementIter	(	TEveElement *	element,
		const char *	regular_expression = nullptr
	)

Definition at line 7 of file TEveElementIter.cc.

                                                                                       {
  if (regular_expression)
    regexp = TPRegexp(regular_expression);
  std::stack<std::pair<TEveElement*, TEveElement::List_i> > parents;
  parents.push(std::pair<TEveElement*, TEveElement::List_i>(element, element->BeginChildren()));
 
  unsigned int index = 0;  // index number to prevent endless loops
  unsigned int indexLimit = 1000000;
  while (!parents.empty() && ++index < indexLimit) {
    // take care of finished loop
    if (parents.top().second == parents.top().first->EndChildren()) {
      addElement(parents.top().first);
      parents.pop();
      if (!parents.empty())
        ++(parents.top().second);
      continue;
    }
 
    // find element without children
    if ((*parents.top().second)->NumChildren() > 0) {
      parents.push(std::pair<TEveElement*, TEveElement::List_i>(*(parents.top().second),
                                                                (*parents.top().second)->BeginChildren()));
      continue;
    }
 
    // we have a leaf element (no children) to process
    addElement(*(parents.top().second));
    ++(parents.top().second);
  }
  if (index >= indexLimit) {
    fwLog(fwlog::kError) << " tree loop limit is reached!\n"
                         << "You either have a tree with loops or navigation logic is broken." << std::endl;
    elements.clear();
  }
  iter = elements.begin();
}

References addElement(), elements, fwLog, iter, fwlog::kError, parents, and regexp.

Member Function Documentation

addElement()

void TEveElementIter::addElement ( TEveElement *  element )

private

Definition at line 63 of file TEveElementIter.cc.

                                                     {
  if (!element)
    return;
  TNamed* named = dynamic_cast<TNamed*>(element);
  if (named && !regexp.MatchB(named->GetName()))
    return;
  elements.push_back(element);
}

References elements, and regexp.

Referenced by TEveElementIter().

current()

TEveElement * TEveElementIter::current

(

)

Definition at line 51 of file TEveElementIter.cc.

                                      {
  if (iter == elements.end())
    return nullptr;
  else
    return *iter;
}

References elements, and iter.

Referenced by next(), and reset().

next()

TEveElement * TEveElementIter::next

(

void

)

Definition at line 44 of file TEveElementIter.cc.

                                   {
  if (iter == elements.end())
    return nullptr;
  ++iter;
  return current();
}

References current(), elements, and iter.

reset()

TEveElement * TEveElementIter::reset

(

void

)

Definition at line 58 of file TEveElementIter.cc.

                                    {
  iter = elements.begin();
  return current();
}

References current(), elements, and iter.

size()

unsigned int TEveElementIter::size ( void  )

inline

Definition at line 25 of file TEveElementIter.h.

{ return elements.size(); }

References elements.

Referenced by ntupleDataFormat._Collection::__iter__(), and ntupleDataFormat._Collection::__len__().

Member Data Documentation

elements

std::vector<TEveElement*> TEveElementIter::elements

private

Definition at line 17 of file TEveElementIter.h.

Referenced by addElement(), current(), next(), reset(), size(), and TEveElementIter().

iter

std::vector<TEveElement*>::iterator TEveElementIter::iter

private

Definition at line 18 of file TEveElementIter.h.

Referenced by current(), next(), reset(), and TEveElementIter().

regexp

TPRegexp TEveElementIter::regexp

private

Definition at line 16 of file TEveElementIter.h.

Referenced by addElement(), and TEveElementIter().