gistfile1.js

view.collection.on('load', function(){
  // new data loaded
});

view.collection.on('page', function(){
  // switched to another page
});

// Switching to the next page

view.collection.nextPage(function(){
  // optional callback, load event will still get triggered
  // switched to the next page
});

// Switching to the previous page

view.collection.prevPage(function(){
  // optional callback, load event will still get triggered
  // switched to the previous page
});

// Switching to a desired page

view.collection.page(5, function(){
  // switched to the 5th page
});