From 9fa1382508d45efe2427f0fefabd85f3cc77c13c Mon Sep 17 00:00:00 2001 From: Hakim El Hattab Date: Sun, 13 Oct 2013 13:02:50 -0400 Subject: foundation for playback component --- css/reveal.css | 13 ++++++ css/reveal.min.css | 2 +- js/reveal.js | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++ js/reveal.min.js | 4 +- 4 files changed, 135 insertions(+), 3 deletions(-) diff --git a/css/reveal.css b/css/reveal.css index 53bd2ba..0cf0212 100644 --- a/css/reveal.css +++ b/css/reveal.css @@ -1551,6 +1551,19 @@ body { } + +/********************************************* + * PLAYBACK COMPONENT + *********************************************/ + +.reveal .playback { + position: fixed; + left: 15px; + bottom: 15px; + z-index: 30; +} + + /********************************************* * ROLLING LINKS *********************************************/ diff --git a/css/reveal.min.css b/css/reveal.min.css index b6220d8..314a692 100644 --- a/css/reveal.min.css +++ b/css/reveal.min.css @@ -4,4 +4,4 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a/js/reveal.js b/js/reveal.js index 7d32638..8811a4f 100644 --- a/js/reveal.js +++ b/js/reveal.js @@ -163,6 +163,9 @@ var Reveal = (function(){ // Flags if the interaction event listeners are bound eventsAreBound = false, + // A visual component used to control auto slide playback + autoSlidePlayer, + // Holds information about the currently ongoing touch input touch = { startX: 0, @@ -570,6 +573,18 @@ var Reveal = (function(){ enablePreviewLinks( '[data-preview-link]' ); } + if( config.autoSlide && config.autoSlideStoppable ) { + autoSlidePlayer = new Playback( dom.wrapper, function() { + return 0.5; + } ); + + autoSlidePlayer.setPlaying( true ); + } + else if( autoSlidePlayer ) { + autoSlidePlayer.destroy(); + autoSlidePlayer = null; + } + // Load the theme in the config, if it's not already loaded if( config.theme && dom.theme ) { var themeURL = dom.theme.getAttribute( 'href' ); @@ -2768,6 +2783,110 @@ var Reveal = (function(){ } + // --------------------------------------------------------------------// + // ------------------------ PLAYBACK COMPONENT ------------------------// + // --------------------------------------------------------------------// + + + function Playback( container, progressCheck ) { + + this.size = 50; + this.thickness = 3; + this.playing = false; + this.progress = 0; + + this.container = container; + this.progressCheck = progressCheck; + + this.canvas = document.createElement( 'canvas' ); + this.canvas.className = 'playback'; + this.canvas.width = this.size; + this.canvas.height = this.size; + this.context = this.canvas.getContext( '2d' ); + + this.container.appendChild( this.canvas ); + + this.render(); + + } + + Playback.prototype.setPlaying = function( value ) { + + this.playing = value; + + // Render instantly + this.render(); + + // Start repainting if we're playing + if( this.playing ) { + this.update(); + } + + }; + + Playback.prototype.setProgress = function( value ) { + + this.progress = value; + this.render(); + + }; + + Playback.prototype.update = function() { + + this.progress = this.progressCheck(); + this.render(); + + if( this.playing ) { + window.requestAnimationFrame( this.update.bind( this ) ); + } + + }; + + Playback.prototype.render = function() { + + var radius = ( this.size / 2 ) - this.thickness, + x = this.size / 2, + y = this.size / 2; + + var startAngle = - Math.PI / 2; + var endAngle = startAngle + ( this.progress * ( Math.PI * 2 ) ); + + this.context.save(); + this.context.clearRect( 0, 0, this.size, this.size ); + + // Solid background color + this.context.beginPath(); + this.context.arc( x, y, radius, 0, Math.PI * 2, false ); + this.context.fillStyle = 'rgba(0,0,0,0.2)'; + this.context.fill(); + + // Draw progress track + this.context.beginPath(); + this.context.arc( x, y, radius, 0, Math.PI * 2, false ); + this.context.lineWidth = this.thickness; + this.context.strokeStyle = '#666'; + this.context.stroke(); + + // Draw progress along arc edge + this.context.beginPath(); + this.context.arc( x, y, radius, startAngle, endAngle, false ); + this.context.lineWidth = this.thickness; + this.context.strokeStyle = '#fff'; + this.context.stroke(); + + this.context.restore(); + + }; + + Playback.prototype.destroy = function() { + + if( this.canvas.parentNode ) { + this.container.removeChild( this.canvas ); + } + + }; + + // --------------------------------------------------------------------// // ------------------------------- API --------------------------------// // --------------------------------------------------------------------// diff --git a/js/reveal.min.js b/js/reveal.min.js index a3d7bcf..94ce16a 100644 --- a/js/reveal.min.js +++ b/js/reveal.min.js @@ -1,8 +1,8 @@ /*! - * reveal.js 2.6.0-dev (2013-10-13, 11:46) + * reveal.js 2.6.0-dev (2013-10-13, 13:02) * http://lab.hakim.se/reveal-js * MIT licensed * * Copyright (C) 2013 Hakim El Hattab, http://hakim.se */ -var Reveal=function(){"use strict";function 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