added left, right, up, down gestures to change slides. moved window edge slide trigge...

diff --git a/js/reveal.js b/js/reveal.js
index 729f2f9cd45b507dd6b1858e618257223f229e2f..7da9935714bdb706b006ce01b46b091a569289f8 100644 (file)
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -25,7 +25,8 @@ var Reveal = (function(){
                        mouseWheel: true,
                        rollingLinks: true,
                        transition: 'default',
-                       theme: 'default'
+                       theme: 'default',
+                       swipeDistance: 30
                },
 
                // Slides may hold a data-state attribute which we pick up and apply 
@@ -82,6 +83,8 @@ var Reveal = (function(){
                // Bind all view events
                document.addEventListener( 'keydown', onDocumentKeyDown, false );
                document.addEventListener( 'touchstart', onDocumentTouchStart, false );
+               document.addEventListener( 'touchmove', onDocumentTouchMove, false );
+               document.addEventListener( 'touchend', onDocumentTouchEnd, false );
                window.addEventListener( 'hashchange', onWindowHashChange, false );
                dom.controlsLeft.addEventListener( 'click', preventAndForward( navigateLeft ), false );
                dom.controlsRight.addEventListener( 'click', preventAndForward( navigateRight ), false );
@@ -235,6 +238,8 @@ var Reveal = (function(){
         * 
         * @param {Object} event
         */
+        var touchStart = {}
+        var gesture = false;
        function onDocumentTouchStart( event ) {
                // We're only interested in one point taps
                if (event.touches.length === 1) {
@@ -245,34 +250,66 @@ var Reveal = (function(){
                        
                        event.preventDefault();
                        
-                       var point = {
+                       touchStart = {
                                x: event.touches[0].clientX,
                                y: event.touches[0].clientY
                        };
                        
+                       slide();
+               }
+       }
+       
+       function onDocumentTouchMove( event ) {
+               
+               event.preventDefault();
+                       
+               if(!gesture) {
+                       var touch = {
+                                       x: event.touches[0].clientX,
+                                       y: event.touches[0].clientY
+                               };
+                       if((touch.x - touchStart.x) > config.swipeDistance){
+                               gesture = true;
+                               navigateLeft();
+                       } else if((touch.x - touchStart.x) < -config.swipeDistance){
+                               gesture = true;
+                               navigateRight();
+                       } else if((touch.y - touchStart.y) > config.swipeDistance){
+                               gesture = true;
+                               navigateUp();
+                       } else if((touch.y - touchStart.y) < -config.swipeDistance){
+                               gesture = true;
+                               navigateDown();
+                       }
+               }
+       }
+       function onDocumentTouchEnd( event ) {
+               
+               event.preventDefault();
+               
+               if(!gesture){//only check for control tap if no gesture is performed
+               
                        // Define the extent of the areas that may be tapped
                        // to navigate
                        var wt = window.innerWidth * 0.3;
                        var ht = window.innerHeight * 0.3;
                        
-                       if( point.x < wt ) {
+                       if( touchStart.x < wt ) {
                                navigateLeft();
                        }
-                       else if( point.x > window.innerWidth - wt ) {
+                       else if( touchStart.x > window.innerWidth - wt ) {
                                navigateRight();
                        }
-                       else if( point.y < ht ) {
+                       else if( touchStart.y < ht ) {
                                navigateUp();
                        }
-                       else if( point.y > window.innerHeight - ht ) {
+                       else if( touchStart.y > window.innerHeight - ht ) {
                                navigateDown();
                        }
-                       
-                       slide();
                }
+               gesture = false;
        }
 
-
        /**
         * Handles mouse wheel scrolling, throttled to avoid 
         * skipping multiple slides.