epub.js/reader/controllers/reader_controller.js

EPUBJS.reader.ReaderController = function(book) {
	var $main = $("#main"),
			$divider = $("#divider"),
			$loader = $("#loader"),
			$next = $("#next"),
			$prev = $("#prev");

	var slideIn = function() {
		$main.removeClass("closed");
	};

	var slideOut = function() {
		$main.addClass("closed");
	};

	var showLoader = function() {
		$loader.show();
		hideDivider();
	};

	var hideLoader = function() {
		$loader.hide();
		
		//-- If the book is using spreads, show the divider
		if(book.settings.spreads) {
			showDivider();
		}
	};

	var showDivider = function() {
		$divider.addClass("show");
	};

	var hideDivider = function() {
		$divider.removeClass("show");
	};

	var keylock = false;

	var arrowKeys = function(e) {		
		if(e.keyCode == 37) { 
			book.prevPage();
			$prev.addClass("active");

			keylock = true;
			setTimeout(function(){
				keylock = false;
				$prev.removeClass("active");
			}, 100);

			 e.preventDefault();
		}
		if(e.keyCode == 39) { 
			book.nextPage();
			$next.addClass("active");

			keylock = true;
			setTimeout(function(){
				keylock = false;
				$next.removeClass("active");
			}, 100);

			 e.preventDefault();
		}
	}

	document.addEventListener('keydown', arrowKeys, false);

	$next.on("click", function(e){
		book.nextPage();
		e.preventDefault();
	});

	$prev.on("click", function(e){
		book.prevPage();
		e.preventDefault();
	});
	
	book.on("book:spreads", function(){
		if(book.settings.spreads) {
			showDivider();
		} else {
			hideDivider();
		}
	});

	return {
		"slideOut" : slideOut,
		"slideIn"  : slideIn,
		"showLoader" : showLoader,
		"hideLoader" : hideLoader,
		"showDivider" : showDivider,
		"hideDivider" : hideDivider,
		"arrowKeys" : arrowKeys
	};
};