xobs/lca2020-pay-it-forward
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include references to previous/current sldie DOM elements in slidechange event

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This commit is contained in:
Hakim El Hattab 2012-06-06 22:46:21 -04:00
parent 2b6c61060b
commit 6a03f65e97
4 changed files with 32 additions and 14 deletions
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4
README.md
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@ -81,11 +81,11 @@ Reveal.addEventListener( 'somestate', function() {
### Slide change event
An 'slidechanged' event is fired each time the slide is changed (regardless of state). The event object holds the index of the current slide.
An 'slidechanged' event is fired each time the slide is changed (regardless of state). The event object holds the index values of the current slide as well as a reference to the previous and current slide HTML nodes.
```
Reveal.addEventListener( 'slidechanged', function( event ) {
// event.indexh & event.indexv
// event.previousSlide, event.currentSlide, event.indexh, event.indexv
} );
```

2
index.html
View File

@ -279,7 +279,7 @@ linkify( 'a' );
// Fires each time a new slide is activated
Reveal.addEventListener( 'slidechanged', function( event ) {
// event.indexh & event.indexv
// event.previousSlide, event.currentSlide, event.indexh, event.indexv
} );
Reveal.initialize({

20
js/reveal.js
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@ -661,11 +661,29 @@ var Reveal = (function(){
clearTimeout( writeURLTimeout );
writeURLTimeout = setTimeout( writeURL, 1500 );
// Only fire if the slide index is different from before
if( indexh !== indexhBefore || indexv !== indexvBefore ) {
// Query all horizontal slides in the deck
var horizontalSlides = document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR );
// Find the previous and current horizontal slides
var previousHorizontalSlide = horizontalSlides[ indexhBefore ],
currentHorizontalSlide = horizontalSlides[ indexh ];
// Query all vertical slides inside of the previous and current horizontal slides
var previousVerticalSlides = previousHorizontalSlide.querySelectorAll( 'section' );
currentVerticalSlides = currentHorizontalSlide.querySelectorAll( 'section' );
// Dispatch an event notifying observers of the change in slide
dispatchEvent( 'slidechanged', {
// Include the current indices in the event
'indexh': indexh,
'indexv': indexv
'indexv': indexv,
// Passes direct references to the slide HTML elements, attempts to find
// a vertical slide and falls back on the horizontal parent
'previousSlide': previousVerticalSlides[ indexvBefore ] || previousHorizontalSlide,
'currentSlide': currentVerticalSlides[ indexv ] || currentHorizontalSlide
} );
}
}

20
js/reveal.min.js vendored
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@ -42,17 +42,17 @@ c=this.getAttribute("data-index-v");b();}}function U(W,Y){var aa=Array.prototype
if(Y<0){Y=ab+Y;}}Y=Math.max(Math.min(Y,ab-1),0);for(var Z=0;Z<ab;Z++){var V=aa[Z];if(O()===false){var ac=Math.abs((Y-Z)%(ab-3))||0;V.style.display=ac>3?"none":"block";
}aa[Z].classList.remove("past");aa[Z].classList.remove("present");aa[Z].classList.remove("future");if(Z<Y){aa[Z].classList.add("past");}else{if(Z>Y){aa[Z].classList.add("future");
}}if(V.querySelector("section")){aa[Z].classList.add("stack");}}aa[Y].classList.add("present");var X=aa[Y].getAttribute("data-state");if(X){T=T.concat(X.split(" "));
}}else{Y=0;}return Y;}function b(aa,W){var ac=T.concat();T.length=0;var ab=k,Z=c;k=U(j,aa===undefined?k:aa);c=U(a,W===undefined?c:W);stateLoop:for(var Y=0,V=T.length;
Y<V;Y++){for(var X=0;X<ac.length;X++){if(ac[X]===T[Y]){ac.splice(X,1);continue stateLoop;}}document.documentElement.classList.add(T[Y]);o(T[Y]);}while(ac.length){document.documentElement.classList.remove(ac.pop());
}}else{Y=0;}return Y;}function b(Z,ad){var X=T.concat();T.length=0;var ab=k,V=c;k=U(j,Z===undefined?k:Z);c=U(a,ad===undefined?c:ad);stateLoop:for(var Y=0,aa=T.length;
Y<aa;Y++){for(var W=0;W<X.length;W++){if(X[W]===T[Y]){X.splice(W,1);continue stateLoop;}}document.documentElement.classList.add(T[Y]);o(T[Y]);}while(X.length){document.documentElement.classList.remove(X.pop());
}if(H.progress){d.progressbar.style.width=(k/(document.querySelectorAll(j).length-1))*window.innerWidth+"px";}if(O()){B();}p();clearTimeout(writeURLTimeout);
writeURLTimeout=setTimeout(g,1500);if(k!==ab||c!==Z){o("slidechanged",{indexh:k,indexv:c});}}function p(){var V=f();[d.controlsLeft,d.controlsRight,d.controlsUp,d.controlsDown].forEach(function(W){W.classList.remove("enabled");
});if(V.left){d.controlsLeft.classList.add("enabled");}if(V.right){d.controlsRight.classList.add("enabled");}if(V.up){d.controlsUp.classList.add("enabled");
}if(V.down){d.controlsDown.classList.add("enabled");}}function f(){var V=document.querySelectorAll(j);var W=document.querySelectorAll(a);return{left:k>0,right:k<V.length-1,up:c>0,down:c<W.length-1};
}function D(){var V=window.location.hash.slice(2).split("/");k=parseInt(V[0])||0;c=parseInt(V[1])||0;F(k,c);}function g(){if(H.history){var V="/";if(k>0||c>0){V+=k;
}if(c>0){V+="/"+c;}window.location.hash=V;}}function o(W,V){var X=document.createEvent("HTMLEvents",1,2);X.initEvent(W,true,true);q(X,V);d.wrapper.dispatchEvent(X);
}function s(){if(document.querySelector(a+".present")){var W=document.querySelectorAll(a+".present .fragment:not(.visible)");if(W.length){W[0].classList.add("visible");
o("fragmentshown",{fragment:W[0]});return true;}}else{var V=document.querySelectorAll(j+".present .fragment:not(.visible)");if(V.length){V[0].classList.add("visible");
o("fragmentshown",{fragment:V[0]});return true;}}return false;}function G(){if(document.querySelector(a+".present")){var W=document.querySelectorAll(a+".present .fragment.visible");
writeURLTimeout=setTimeout(g,1500);if(k!==ab||c!==V){var ac=document.querySelectorAll(j);slidesv=document.querySelectorAll(a);o("slidechanged",{indexh:k,indexv:c,slide:slidesv.length?slidesv[c]:ac[k]});
}}function p(){var V=f();[d.controlsLeft,d.controlsRight,d.controlsUp,d.controlsDown].forEach(function(W){W.classList.remove("enabled");});if(V.left){d.controlsLeft.classList.add("enabled");
}if(V.right){d.controlsRight.classList.add("enabled");}if(V.up){d.controlsUp.classList.add("enabled");}if(V.down){d.controlsDown.classList.add("enabled");
}}function f(){var V=document.querySelectorAll(j);var W=document.querySelectorAll(a);return{left:k>0,right:k<V.length-1,up:c>0,down:c<W.length-1};}function D(){var V=window.location.hash.slice(2).split("/");
k=parseInt(V[0])||0;c=parseInt(V[1])||0;F(k,c);}function g(){if(H.history){var V="/";if(k>0||c>0){V+=k;}if(c>0){V+="/"+c;}window.location.hash=V;}}function o(W,V){var X=document.createEvent("HTMLEvents",1,2);
X.initEvent(W,true,true);q(X,V);d.wrapper.dispatchEvent(X);}function s(){if(document.querySelector(a+".present")){var W=document.querySelectorAll(a+".present .fragment:not(.visible)");
if(W.length){W[0].classList.add("visible");o("fragmentshown",{fragment:W[0]});return true;}}else{var V=document.querySelectorAll(j+".present .fragment:not(.visible)");
if(V.length){V[0].classList.add("visible");o("fragmentshown",{fragment:V[0]});return true;}}return false;}function G(){if(document.querySelector(a+".present")){var W=document.querySelectorAll(a+".present .fragment.visible");
if(W.length){W[W.length-1].classList.remove("visible");o("fragmenthidden",{fragment:W[0]});return true;}}else{var V=document.querySelectorAll(j+".present .fragment.visible");
if(V.length){V[V.length-1].classList.remove("visible");o("fragmenthidden",{fragment:V[0]});return true;}}return false;}function F(W,V){b(W,V);}function w(){if(O()||G()===false){b(k-1,0);
}}function i(){if(O()||s()===false){b(k+1,0);}}function r(){if(O()||G()===false){b(k,c-1);}}function A(){if(O()||s()===false){b(k,c+1);}}function N(){if(G()===false){if(f().up){r();