From 16b71d7a218909a0c5cd70a7e303c601a6f015fa Mon Sep 17 00:00:00 2001 From: hakimel Date: Tue, 9 Oct 2012 09:22:16 -0400 Subject: slight tweak to zoom integration --- lib/js/zoom.js | 257 --------------------------------------------------------- 1 file changed, 257 deletions(-) delete mode 100644 lib/js/zoom.js (limited to 'lib') diff --git a/lib/js/zoom.js b/lib/js/zoom.js deleted file mode 100644 index 7fba523..0000000 --- a/lib/js/zoom.js +++ /dev/null @@ -1,257 +0,0 @@ -/*! - * zoom.js 0.2 (modified version for use with reveal.js) - * http://lab.hakim.se/zoom-js - * MIT licensed - * - * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se - */ -var zoom = (function(){ - - // The current zoom level (scale) - var level = 1; - - // The current mouse position, used for panning - var mouseX = 0, - mouseY = 0; - - // Timeout before pan is activated - var panEngageTimeout = -1, - panUpdateInterval = -1; - - var currentOptions = null; - - // Check for transform support so that we can fallback otherwise - var supportsTransforms = 'WebkitTransform' in document.body.style || - 'MozTransform' in document.body.style || - 'msTransform' in document.body.style || - 'OTransform' in document.body.style || - 'transform' in document.body.style; - - if( supportsTransforms ) { - // The easing that will be applied when we zoom in/out - document.body.style.transition = 'transform 0.8s ease'; - document.body.style.OTransition = '-o-transform 0.8s ease'; - document.body.style.msTransition = '-ms-transform 0.8s ease'; - document.body.style.MozTransition = '-moz-transform 0.8s ease'; - document.body.style.WebkitTransition = '-webkit-transform 0.8s ease'; - } - - // Zoom out if the user hits escape - document.addEventListener( 'keyup', function( event ) { - if( level !== 1 && event.keyCode === 27 ) { - zoom.out(); - } - } ); - - // Monitor mouse movement for panning - document.addEventListener( 'mousemove', function( event ) { - if( level !== 1 ) { - mouseX = event.clientX; - mouseY = event.clientY; - } - } ); - - /** - * Applies the CSS required to zoom in, prioritizes use of CSS3 - * transforms but falls back on zoom for IE. - * - * @param {Number} pageOffsetX - * @param {Number} pageOffsetY - * @param {Number} elementOffsetX - * @param {Number} elementOffsetY - * @param {Number} scale - */ - function magnify( pageOffsetX, pageOffsetY, elementOffsetX, elementOffsetY, scale ) { - - if( supportsTransforms ) { - var origin = pageOffsetX +'px '+ pageOffsetY +'px', - transform = 'translate('+ -elementOffsetX +'px,'+ -elementOffsetY +'px) scale('+ scale +')'; - - document.body.style.transformOrigin = origin; - document.body.style.OTransformOrigin = origin; - document.body.style.msTransformOrigin = origin; - document.body.style.MozTransformOrigin = origin; - document.body.style.WebkitTransformOrigin = origin; - - document.body.style.transform = transform; - document.body.style.OTransform = transform; - document.body.style.msTransform = transform; - document.body.style.MozTransform = transform; - document.body.style.WebkitTransform = transform; - } - else { - // Reset all values - if( scale === 1 ) { - document.body.style.position = ''; - document.body.style.left = ''; - document.body.style.top = ''; - document.body.style.width = ''; - document.body.style.height = ''; - document.body.style.zoom = ''; - } - // Apply scale - else { - document.body.style.position = 'relative'; - document.body.style.left = ( - ( pageOffsetX + elementOffsetX ) / scale ) + 'px'; - document.body.style.top = ( - ( pageOffsetY + elementOffsetY ) / scale ) + 'px'; - document.body.style.width = ( scale * 100 ) + '%'; - document.body.style.height = ( scale * 100 ) + '%'; - document.body.style.zoom = scale; - } - } - - level = scale; - } - - /** - * Pan the document when the mosue cursor approaches the edges - * of the window. - */ - function pan() { - var range = 0.12, - rangeX = window.innerWidth * range, - rangeY = window.innerHeight * range, - scrollOffset = getScrollOffset(); - - // Up - if( mouseY < rangeY ) { - window.scroll( scrollOffset.x, scrollOffset.y - ( 1 - ( mouseY / rangeY ) ) * ( 14 / level ) ); - } - // Down - else if( mouseY > window.innerHeight - rangeY ) { - window.scroll( scrollOffset.x, scrollOffset.y + ( 1 - ( window.innerHeight - mouseY ) / rangeY ) * ( 14 / level ) ); - } - - // Left - if( mouseX < rangeX ) { - window.scroll( scrollOffset.x - ( 1 - ( mouseX / rangeX ) ) * ( 14 / level ), scrollOffset.y ); - } - // Right - else if( mouseX > window.innerWidth - rangeX ) { - window.scroll( scrollOffset.x + ( 1 - ( window.innerWidth - mouseX ) / rangeX ) * ( 14 / level ), scrollOffset.y ); - } - } - - function getScrollOffset() { - return { - x: window.scrollX !== undefined ? window.scrollX : window.pageXOffset, - y: window.scrollY !== undefined ? window.scrollY : window.pageXYffset - } - } - - return { - /** - * Zooms in on either a rectangle or HTML element. - * - * @param {Object} options - * - element: HTML element to zoom in on - * OR - * - x/y: coordinates in non-transformed space to zoom in on - * - width/height: the portion of the screen to zoom in on - * - scale: can be used instead of width/height to explicitly set scale - */ - to: function( options ) { - // Due to an implementation limitation we can't zoom in - // to another element without zooming out first - if( level !== 1 ) { - zoom.out(); - } - else { - options.x = options.x || 0; - options.y = options.y || 0; - - // If an element is set, that takes precedence - if( !!options.element ) { - // Space around the zoomed in element to leave on screen - var padding = 20; - - options.width = options.element.getBoundingClientRect().width + ( padding * 2 ); - options.height = options.element.getBoundingClientRect().height + ( padding * 2 ); - options.x = options.element.getBoundingClientRect().left - padding; - options.y = options.element.getBoundingClientRect().top - padding; - } - - // If width/height values are set, calculate scale from those values - if( options.width !== undefined && options.height !== undefined ) { - options.scale = Math.max( Math.min( window.innerWidth / options.width, window.innerHeight / options.height ), 1 ); - } - - if( options.scale > 1 ) { - options.x *= options.scale; - options.y *= options.scale; - - var scrollOffset = getScrollOffset(); - - if( options.element ) { - scrollOffset.x -= ( window.innerWidth - ( options.width * options.scale ) ) / 2; - } - - magnify( scrollOffset.x, scrollOffset.y, options.x, options.y, options.scale ); - - if( options.pan !== false ) { - - // Wait with engaging panning as it may conflict with the - // zoom transition - panEngageTimeout = setTimeout( function() { - panUpdateInterval = setInterval( pan, 1000 / 60 ); - }, 800 ); - - } - } - - currentOptions = options; - } - }, - - /** - * Resets the document zoom state to its default. - */ - out: function() { - clearTimeout( panEngageTimeout ); - clearInterval( panUpdateInterval ); - - var scrollOffset = getScrollOffset(); - - if( currentOptions && currentOptions.element ) { - scrollOffset.x -= ( window.innerWidth - ( currentOptions.width * currentOptions.scale ) ) / 2; - } - - magnify( scrollOffset.x, scrollOffset.y, 0, 0, 1 ); - - level = 1; - }, - - // Alias - magnify: function( options ) { this.to( options ) }, - reset: function() { this.out() }, - - zoomLevel: function() { - return level; - } - } - -})(); - - - - -// Custom reveal.js integration -(function(){ - var modifierIsActive = false; - - function updateKeyFlag( event ) { - modifierIsActive = event.altKey; - } - - document.addEventListener( 'keypress', updateKeyFlag, false ); - document.addEventListener( 'keydown', updateKeyFlag, false ); - document.addEventListener( 'keyup', updateKeyFlag, false ); - - document.querySelector( '.reveal' ).addEventListener( 'click', function( event ) { - if( modifierIsActive ) { - event.preventDefault(); - zoom.to({ element: event.target, pan: false }); - } - } ); -})(); - -- cgit v1.2.3