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enable pinch to zoom interaction if overview is disabled (#175)

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This commit is contained in:
Hakim El Hattab 2012-10-14 19:58:24 -04:00
parent 6e0d0e279d
commit 86a907e8cc
2 changed files with 15 additions and 11 deletions
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14
js/reveal.js
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@ -102,7 +102,7 @@ var Reveal = (function(){
startSpan: 0, startSpan: 0,
startCount: 0, startCount: 0,
handled: false, handled: false,
threshold: 40 threshold: 80
}; };
/** /**
@ -471,7 +471,7 @@ var Reveal = (function(){
// If there's two touches we need to memorize the distance // If there's two touches we need to memorize the distance
// between those two points to detect pinching // between those two points to detect pinching
if( event.touches.length === 2 ) { if( event.touches.length === 2 && config.overview ) {
touch.startSpan = distanceBetween( { touch.startSpan = distanceBetween( {
x: event.touches[1].clientX, x: event.touches[1].clientX,
y: event.touches[1].clientY y: event.touches[1].clientY
@ -493,7 +493,7 @@ var Reveal = (function(){
// If the touch started off with two points and still has // If the touch started off with two points and still has
// two active touches; test for the pinch gesture // two active touches; test for the pinch gesture
if( event.touches.length === 2 && touch.startCount === 2 ) { if( event.touches.length === 2 && touch.startCount === 2 && config.overview ) {
// The current distance in pixels between the two touch points // The current distance in pixels between the two touch points
var currentSpan = distanceBetween( { var currentSpan = distanceBetween( {
@ -517,9 +517,12 @@ var Reveal = (function(){
} }
} }
event.preventDefault();
} }
// There was only one touch point, look for a swipe // There was only one touch point, look for a swipe
else if( event.touches.length === 1 ) { else if( event.touches.length === 1 && touch.startCount !== 2 ) {
var deltaX = currentX - touch.startX, var deltaX = currentX - touch.startX,
deltaY = currentY - touch.startY; deltaY = currentY - touch.startY;
@ -539,9 +542,10 @@ var Reveal = (function(){
touch.handled = true; touch.handled = true;
navigateDown(); navigateDown();
} }
}
event.preventDefault(); event.preventDefault();
}
} }
// There's a bug with swiping on some Android devices unless // There's a bug with swiping on some Android devices unless
// the default action is always prevented // the default action is always prevented

10
js/reveal.min.js vendored
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