#include <algorithm>
-using namespace boost;
-using namespace std;
+using boost::shared_ptr;
+using std::max;
+using std::make_pair;
+using std::min;
+using std::pair;
namespace pv {
namespace view {
const int CursorPair::DeltaPadding = 8;
-CursorPair::CursorPair(const View &view) :
+CursorPair::CursorPair(View &view) :
_first(new Cursor(view, 0.0)),
_second(new Cursor(view, 1.0)),
_view(view)