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@ -1,29 +1,34 @@ |
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// Custom reveal.js integration
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(function(){ |
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document.querySelector( '.reveal' ).addEventListener( 'click', function( event ) { |
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if( event.altKey ) { |
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var isEnabled = true; |
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document.querySelector( '.reveal' ).addEventListener( 'mousedown', function( event ) { |
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if( event.altKey && isEnabled ) { |
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event.preventDefault(); |
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zoom.to({ element: event.target, pan: false }); |
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} |
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} ); |
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Reveal.addEventListener( 'overviewshown', function() { isEnabled = false; } ); |
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Reveal.addEventListener( 'overviewhidden', function() { isEnabled = true; } ); |
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})(); |
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/*! |
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* zoom.js 0.2 (modified version for use with reveal.js) |
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* http://lab.hakim.se/zoom-js
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* MIT licensed |
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* |
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* |
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* Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
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*/ |
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var zoom = (function(){ |
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// The current zoom level (scale)
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var level = 1; |
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// The current mouse position, used for panning
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var mouseX = 0, |
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mouseY = 0; |
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// Timeout before pan is activated
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var panEngageTimeout = -1, |
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panUpdateInterval = -1; |
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@ -36,7 +41,7 @@ var zoom = (function(){ |
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'msTransform' in document.body.style || |
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'OTransform' in document.body.style || |
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'transform' in document.body.style; |
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if( supportsTransforms ) { |
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// The easing that will be applied when we zoom in/out
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document.body.style.transition = 'transform 0.8s ease'; |
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@ -45,7 +50,7 @@ var zoom = (function(){ |
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document.body.style.MozTransition = '-moz-transform 0.8s ease'; |
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document.body.style.WebkitTransition = '-webkit-transform 0.8s ease'; |
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} |
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// Zoom out if the user hits escape
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document.addEventListener( 'keyup', function( event ) { |
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if( level !== 1 && event.keyCode === 27 ) { |
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@ -62,21 +67,21 @@ var zoom = (function(){ |
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}, false ); |
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/** |
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* Applies the CSS required to zoom in, prioritizes use of CSS3 |
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* Applies the CSS required to zoom in, prioritizes use of CSS3 |
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* transforms but falls back on zoom for IE. |
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* |
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* @param {Number} pageOffsetX |
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* @param {Number} pageOffsetY |
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* @param {Number} elementOffsetX |
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* @param {Number} elementOffsetY |
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* @param {Number} scale |
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* |
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* @param {Number} pageOffsetX |
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* @param {Number} pageOffsetY |
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* @param {Number} elementOffsetX |
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* @param {Number} elementOffsetY |
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* @param {Number} scale |
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*/ |
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function magnify( pageOffsetX, pageOffsetY, elementOffsetX, elementOffsetY, scale ) { |
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if( supportsTransforms ) { |
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var origin = pageOffsetX +'px '+ pageOffsetY +'px', |
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transform = 'translate('+ -elementOffsetX +'px,'+ -elementOffsetY +'px) scale('+ scale +')'; |
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document.body.style.transformOrigin = origin; |
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document.body.style.OTransformOrigin = origin; |
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document.body.style.msTransformOrigin = origin; |
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@ -121,7 +126,7 @@ var zoom = (function(){ |
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} |
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/** |
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* Pan the document when the mosue cursor approaches the edges |
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* Pan the document when the mosue cursor approaches the edges |
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* of the window. |
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*/ |
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function pan() { |
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@ -129,7 +134,7 @@ var zoom = (function(){ |
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rangeX = window.innerWidth * range, |
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rangeY = window.innerHeight * range, |
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scrollOffset = getScrollOffset(); |
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// Up
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if( mouseY < rangeY ) { |
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window.scroll( scrollOffset.x, scrollOffset.y - ( 1 - ( mouseY / rangeY ) ) * ( 14 / level ) ); |
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@ -159,7 +164,7 @@ var zoom = (function(){ |
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return { |
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/** |
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* Zooms in on either a rectangle or HTML element. |
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* |
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* |
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* @param {Object} options |
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* - element: HTML element to zoom in on |
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* OR |
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@ -232,7 +237,7 @@ var zoom = (function(){ |
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if( currentOptions && currentOptions.element ) { |
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scrollOffset.x -= ( window.innerWidth - ( currentOptions.width * currentOptions.scale ) ) / 2; |
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} |
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magnify( scrollOffset.x, scrollOffset.y, 0, 0, 1 ); |
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level = 1; |
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@ -241,11 +246,11 @@ var zoom = (function(){ |
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// Alias
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magnify: function( options ) { this.to( options ) }, |
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reset: function() { this.out() }, |
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zoomLevel: function() { |
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return level; |
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} |
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} |
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})(); |
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