Added pan + zoom to diagram viewer; show_diagram() didn't return; added PyQt, PyOpenGL, NumPy as dependencies in the docs
#ifndef __PYTHON_UTILS_H__
#define __PYTHON_UTILS_H__
#include <boost/python.hpp>
#include <boost/iterator/counting_iterator.hpp>
namespace bp = boost::python;
namespace dionysus {
namespace python {
// Random access iterator into python's list (using integer indices)
template<class Value>
class ListRandomAccessIterator:
public boost::iterator_adaptor<ListRandomAccessIterator<Value>, // Derived
boost::counting_iterator<unsigned>, // Base
Value, // Value
boost::use_default,
Value>
{
public:
typedef ListRandomAccessIterator Self;
typedef boost::iterator_adaptor<ListRandomAccessIterator,
boost::counting_iterator<unsigned>,
Value,
boost::use_default,
Value> Parent;
ListRandomAccessIterator() {}
ListRandomAccessIterator(bp::list l, unsigned i):
Parent(i), l_(l) {}
private:
friend class boost::iterator_core_access;
friend class FiltrationPythonIterator;
typename Parent::reference
dereference() const { return bp::object(l_[*(this->base())]); }
bp::list l_;
};
// Adaptor of a Pyhon object to act as a C++-style comparison functor
struct PythonCmp
{
template<class T>
bool operator()(T x1, T x2) const { return cmp_(x1, x2) < 0; }
PythonCmp(bp::object cmp): cmp_(cmp) {}
bp::object cmp_;
};
template<class T1, class T2>
struct PairToTupleConverter
{
static PyObject* convert(const std::pair<T1, T2>& pair) { return bp::incref(bp::make_tuple(pair.first, pair.second).ptr()); }
};
} } // namespace dionysus::python
#endif