correction to view distance calculation for vertical slides
authorHakim El Hattab <hakim.elhattab@gmail.com>
Sun, 11 Aug 2013 20:27:52 +0000 (16:27 -0400)
committerHakim El Hattab <hakim.elhattab@gmail.com>
Sun, 11 Aug 2013 20:27:52 +0000 (16:27 -0400)
js/reveal.js
js/reveal.min.js

index 7657ec759298b97806bdf3e406084a67e9042195..feb2a103632c4dff14b55113ababd362855e60a2 100644 (file)
@@ -1587,13 +1587,14 @@ var Reveal = (function(){
                // an array
                var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ),
                        horizontalSlidesLength = horizontalSlides.length,
-                       distance;
+                       distanceX,
+                       distanceY;
 
                if( horizontalSlidesLength ) {
 
                        // The number of steps away from the present slide that will
                        // be visible
-                       var viewDistance = isOverview() ? 20 : config.viewDistance;
+                       var viewDistance = isOverview() ? 10 : config.viewDistance;
 
                        // Limit view distance on weaker devices
                        if( isMobileDevice ) {
@@ -1606,30 +1607,29 @@ var Reveal = (function(){
                                var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ),
                                        verticalSlidesLength = verticalSlides.length;
 
+                               // Loops so that it measures 1 between the first and last slides
+                               distanceX = Math.abs( ( indexh - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
+
                                if( verticalSlidesLength ) {
 
                                        // Always show the vertical stack itself, even if its child
                                        // slides are invisible
                                        horizontalSlide.style.display = 'block';
 
+                                       var oy = getPreviousVerticalIndex( horizontalSlide );
+
                                        for( var y = 0; y < verticalSlidesLength; y++ ) {
                                                var verticalSlide = verticalSlides[y];
 
-                                               var dx = x - indexh,
-                                                       dy = y - indexv;
+                                               distanceY = x === indexh ? Math.abs( indexv - y ) : Math.abs( y - oy );
 
-                                               distance = Math.sqrt( dx*dx + dy*dy );
-
-                                               verticalSlide.style.display = distance > viewDistance ? 'none' : 'block';
+                                               verticalSlide.style.display = ( distanceX + distanceY ) > viewDistance ? 'none' : 'block';
                                        }
 
                                }
                                else {
 
-                                       // Loops so that it measures 1 between the first and last slides
-                                       distance = Math.abs( ( indexh - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
-
-                                       horizontalSlide.style.display = distance > viewDistance ? 'none' : 'block';
+                                       horizontalSlide.style.display = distanceX > viewDistance ? 'none' : 'block';
 
                                }
                        }
index bc1a2d6cbe8348687ecead36ba11ce54543a5c5c..1e0cbcbb199456c339288cde2464123874f61fd7 100644 (file)
@@ -1,8 +1,8 @@
 /*!
- * reveal.js 2.5.0 (2013-08-11, 13:43)
+ * reveal.js 2.5.0 (2013-08-11, 16:27)
  * http://lab.hakim.se/reveal-js
  * MIT licensed
  *
  * Copyright (C) 2013 Hakim El Hattab, http://hakim.se
  */
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