2 files changed, 81 insertions, 0 deletions
diff --git a/cardiff2015/slides/plugin/postmessage/example.html b/cardiff2015/slides/plugin/postmessage/example.html
new file mode 100644
index 0000000..cc57a7b
--- /dev/null
+++ b/cardiff2015/slides/plugin/postmessage/example.html
@@ -0,0 +1,39 @@
+<html>
+	<body>
+
+		<iframe id="reveal" src="../../index.html" style="border: 0;" width="500" height="500"></iframe>
+
+		<div>
+			<input id="back" type="button" value="go back"/>
+			<input id="ahead" type="button" value="go ahead"/>
+			<input id="slideto" type="button" value="slideto 2-2"/>
+		</div>
+
+		<script>
+
+			(function (){
+
+				var back = document.getElementById( 'back' ),
+						ahead = document.getElementById( 'ahead' ),
+						slideto = document.getElementById( 'slideto' ),
+						reveal =  window.frames[0];
+
+					back.addEventListener( 'click', function () {
+						
+					reveal.postMessage( JSON.stringify({method: 'prev', args: []}), '*' );
+				}, false );
+
+				ahead.addEventListener( 'click', function (){
+					reveal.postMessage( JSON.stringify({method: 'next', args: []}), '*' );
+				}, false );
+
+				slideto.addEventListener( 'click', function (){
+					reveal.postMessage( JSON.stringify({method: 'slide', args: [2,2]}), '*' );
+				}, false );
+
+			}());
+
+		</script>
+
+	</body>
+</html>
diff --git a/cardiff2015/slides/plugin/postmessage/postmessage.js b/cardiff2015/slides/plugin/postmessage/postmessage.js
new file mode 100644
index 0000000..d0f4140
--- /dev/null
+++ b/cardiff2015/slides/plugin/postmessage/postmessage.js
@@ -0,0 +1,42 @@
+/*
+
+	simple postmessage plugin
+
+	Useful when a reveal slideshow is inside an iframe.
+	It allows to call reveal methods from outside.
+
+	Example:
+		 var reveal =  window.frames[0];
+
+		 // Reveal.prev(); 
+		 reveal.postMessage(JSON.stringify({method: 'prev', args: []}), '*');
+		 // Reveal.next(); 
+		 reveal.postMessage(JSON.stringify({method: 'next', args: []}), '*');
+		 // Reveal.slide(2, 2); 
+		 reveal.postMessage(JSON.stringify({method: 'slide', args: [2,2]}), '*');
+
+	Add to the slideshow:
+
+		dependencies: [
+			...
+			{ src: 'plugin/postmessage/postmessage.js', async: true, condition: function() { return !!document.body.classList; } }
+		]
+
+*/
+
+(function (){
+
+	window.addEventListener( "message", function ( event ) {
+		var data = JSON.parse( event.data ),
+				method = data.method,
+				args = data.args;
+
+		if( typeof Reveal[method] === 'function' ) {
+			Reveal[method].apply( Reveal, data.args );
+		}
+	}, false);
+
+}());
+
+
+