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<!DOCTYPE html>
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<title>Geography 485L/585L - Internet Mapping</title>
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<section class="title">
<h1 class="title">Geography 485L/585L - Internet Mapping</h1>
<footer>
<span class="author">Karl Benedict</span> · <span class="date">Spring 2018</span>
</footer>
</section>
<section class="slide level3">
<!---------------------------------------------------------------------------->
<!-- Week 10 ----------------------------------------------------------------->
<!-- Lecture 02 b 01 a ------------------------------------------------------->
<!-- Web-based Mapping Clients------------------------------------------------>
<!-- OpenLayers Javascript Framework------------------------------------------>
<!---------------------------------------------------------------------------->
</section>
<section id="week-10---module-2b---openlayers-4-javascript-framework" class="title-slide slide level1"><h1>Week 10 - Module 2b - OpenLayers 4 Javascript Framework</h1></section><section id="overview" class="slide level3 module02b01a">
<h3>Overview</h3>
<ul>
<li><p>Capabilities</p></li>
<li><p>OpenLayers = Javascript (by example)</p></li>
</ul>
</section><section id="openlayers-capabilities" class="slide level3 module02b01a">
<h3>OpenLayers Capabilities</h3>
<ul>
<li>Support for Multiple basemaps: <em>BingMaps</em>, <em>OpenStreetMap</em>, <em>Stamen</em></li>
<li>Model for interaction with multiple map server platforms: <em>ArcGIS</em> (REST), <em>MapServer</em>, <em>GeoServer</em></li>
<li>Support for key OGC standards: <em>WMS</em>, <em>WMTS</em>, <em>WFS</em>, <em>GML</em>, <em>KML</em></li>
<li>Multiple control types: <em>Attribution</em>, <em>Zoom</em>, <em>Overview</em>, <em>Scale</em>, <em>FullScreen</em>, <em>Graticule</em></li>
<li>Custom styled features with associated attributes: <em>Curve</em>, <em>LinearRing</em>, <em>LineString</em>, <em>MultiLineString</em>, <em>MultiPoint</em>, <em>MultiPolygon</em>, <em>Point</em>, <em>Polygon</em></li>
<li>Support for many formats for data read and write: <em>ATOM</em>, <em>GML</em> (1, 2, 3), <em>GeoJSON</em>, <em>GPX</em>, <em>KML</em>, <em>WKT</em>, any many others</li>
<li>Open Source, enabling modification and integration into other systems (e.g. <a href="http://geoext.org/">GeoExt</a>)</li>
</ul>
</section><section id="distinguishing-characteristics-between-openlayers-and-google-maps" class="slide level3 module02b01a">
<h3>Distinguishing Characteristics Between OpenLayers and Google Maps</h3>
<ul>
<li>Greater emphasis on client-side processing - Client access and rendering of data files that Google’s servers otherwise take care of (pros & cons to this approach)</li>
<li>Integrated support for OGC services and their products</li>
<li>Support for different projections (adds complexity)</li>
<li>API more rich in options ==> more complexity</li>
</ul>
</section><section id="resources" class="slide level3 module02b01a">
<h3>Resources</h3>
<p><a href="http://openlayers.org/">OpenLayers Home Page</a></p>
<p><a href="http://openlayers.org/en/latest/apidoc/">Application Programming Interface (API) Reference</a></p>
<p><a href="http://openlayers.org/en/latest/examples/">Examples</a></p>
</section><section id="demonstrations-and-examples" class="slide level3 module02b01a">
<h3>Demonstrations and Examples</h3>
<div class="codeTable">
<p>OpenLayers_01.html</p>
<div class="sourceCode" id="OpenLayers_01_demo"><pre class="sourceCode numberSource html numberLines"><code class="sourceCode html"><a class="sourceLine" id="OpenLayers_01_demo-1" data-line-number="1"><span class="kw"><html></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-2" data-line-number="2"></a>
<a class="sourceLine" id="OpenLayers_01_demo-3" data-line-number="3"><span class="kw"><head></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-4" data-line-number="4"> <span class="kw"><link</span><span class="ot"> rel=</span><span class="st">"stylesheet"</span><span class="ot"> href=</span><span class="st">"css/OpenLayers_01.css"</span><span class="ot"> type=</span><span class="st">"text/css"</span><span class="kw">></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-5" data-line-number="5"> </a>
<a class="sourceLine" id="OpenLayers_01_demo-6" data-line-number="6"> <span class="co"><!-- these two files are imported from a host that provides a hosted full </span></a>
<a class="sourceLine" id="OpenLayers_01_demo-7" data-line-number="7"><span class="co"> build of the OpenLayers package for development as documented here: </span></a>
<a class="sourceLine" id="OpenLayers_01_demo-8" data-line-number="8"><span class="co"> https://openlayers.org/download/ --></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-9" data-line-number="9"> <span class="kw"><link</span> </a>
<a class="sourceLine" id="OpenLayers_01_demo-10" data-line-number="10"><span class="ot"> rel=</span><span class="st">"stylesheet"</span> </a>
<a class="sourceLine" id="OpenLayers_01_demo-11" data-line-number="11"><span class="ot"> href=</span><span class="st">"https://cdnjs.cloudflare.com/ajax/libs/openlayers/4.6.4/ol.css"</span> </a>
<a class="sourceLine" id="OpenLayers_01_demo-12" data-line-number="12"><span class="ot"> type=</span><span class="st">"text/css"</span><span class="kw">></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-13" data-line-number="13"> <span class="kw"><script</span> </a>
<a class="sourceLine" id="OpenLayers_01_demo-14" data-line-number="14"><span class="ot"> src=</span><span class="st">"https://cdnjs.cloudflare.com/ajax/libs/openlayers/4.6.4/ol.js"</span> </a>
<a class="sourceLine" id="OpenLayers_01_demo-15" data-line-number="15"><span class="ot"> type=</span><span class="st">"text/javascript"</span><span class="kw">></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-16" data-line-number="16"> <span class="kw"></script></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-17" data-line-number="17"><span class="kw"></head></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-18" data-line-number="18"></a>
<a class="sourceLine" id="OpenLayers_01_demo-19" data-line-number="19"><span class="kw"><body></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-20" data-line-number="20"> <span class="kw"><h1></span>This is a very simple OpenLayers 4 sample map page<span class="kw"></h1></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-21" data-line-number="21"></a>
<a class="sourceLine" id="OpenLayers_01_demo-22" data-line-number="22"> <span class="kw"><div</span><span class="ot"> id=</span><span class="st">'map'</span><span class="kw">></span><span class="co"><!-- This is where the map will be displayed --></span><span class="kw"></div></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-23" data-line-number="23"></a>
<a class="sourceLine" id="OpenLayers_01_demo-24" data-line-number="24"> <span class="co"><!-- import the external Javascript file with the map configuration code --></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-25" data-line-number="25"> <span class="kw"><script</span><span class="ot"> src=</span><span class="st">"js/OpenLayers_01.js"</span><span class="ot"> type=</span><span class="st">"text/javascript"</span><span class="kw">></script></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-26" data-line-number="26"><span class="kw"></body></span></a>
<a class="sourceLine" id="OpenLayers_01_demo-27" data-line-number="27"></a>
<a class="sourceLine" id="OpenLayers_01_demo-28" data-line-number="28"><span class="kw"></html></span></a></code></pre></div>
<p>OpenLayers_01.js</p>
<div class="sourceCode" id="cb1"><pre class="sourceCode numberSource html numberLines"><code class="sourceCode html"><a class="sourceLine" id="cb1-1" data-line-number="1">// OpenLayers_01.js</a>
<a class="sourceLine" id="cb1-2" data-line-number="2"></a>
<a class="sourceLine" id="cb1-3" data-line-number="3">var myMap = new ol.Map({</a>
<a class="sourceLine" id="cb1-4" data-line-number="4"> target: 'map',</a>
<a class="sourceLine" id="cb1-5" data-line-number="5"> layers: [</a>
<a class="sourceLine" id="cb1-6" data-line-number="6"> new ol.layer.Tile({</a>
<a class="sourceLine" id="cb1-7" data-line-number="7"> source: new ol.source.OSM()</a>
<a class="sourceLine" id="cb1-8" data-line-number="8"> })</a>
<a class="sourceLine" id="cb1-9" data-line-number="9"> ],</a>
<a class="sourceLine" id="cb1-10" data-line-number="10"> view: new ol.View({</a>
<a class="sourceLine" id="cb1-11" data-line-number="11"> center: ol.proj.fromLonLat([-106.624083,35.08427]),</a>
<a class="sourceLine" id="cb1-12" data-line-number="12"> zoom: 18</a>
<a class="sourceLine" id="cb1-13" data-line-number="13"> })</a>
<a class="sourceLine" id="cb1-14" data-line-number="14"> });</a></code></pre></div>
<p>OpenLayers_01.css</p>
<div class="sourceCode" id="cb2"><pre class="sourceCode numberSource html numberLines"><code class="sourceCode html"><a class="sourceLine" id="cb2-1" data-line-number="1">/* OpenLayers_01.css */</a>
<a class="sourceLine" id="cb2-2" data-line-number="2"></a>
<a class="sourceLine" id="cb2-3" data-line-number="3">body {</a>
<a class="sourceLine" id="cb2-4" data-line-number="4"> width:100%;</a>
<a class="sourceLine" id="cb2-5" data-line-number="5"> height:100%</a>
<a class="sourceLine" id="cb2-6" data-line-number="6">}</a>
<a class="sourceLine" id="cb2-7" data-line-number="7"></a>
<a class="sourceLine" id="cb2-8" data-line-number="8">#map,.map {</a>
<a class="sourceLine" id="cb2-9" data-line-number="9"> width:600px;</a>
<a class="sourceLine" id="cb2-10" data-line-number="10"> height:400px;</a>
<a class="sourceLine" id="cb2-11" data-line-number="11">}</a>
<a class="sourceLine" id="cb2-12" data-line-number="12"></a>
<a class="sourceLine" id="cb2-13" data-line-number="13">#map_selector li {</a>
<a class="sourceLine" id="cb2-14" data-line-number="14"> cursor:pointer;</a>
<a class="sourceLine" id="cb2-15" data-line-number="15"> width:350px;</a>
<a class="sourceLine" id="cb2-16" data-line-number="16">}</a>
<a class="sourceLine" id="cb2-17" data-line-number="17"></a>
<a class="sourceLine" id="cb2-18" data-line-number="18">#map_selector li:hover {</a>
<a class="sourceLine" id="cb2-19" data-line-number="19"> background-color: yellow;</a>
<a class="sourceLine" id="cb2-20" data-line-number="20">}</a>
<a class="sourceLine" id="cb2-21" data-line-number="21"></a>
<a class="sourceLine" id="cb2-22" data-line-number="22"></a>
<a class="sourceLine" id="cb2-23" data-line-number="23"></a>
<a class="sourceLine" id="cb2-24" data-line-number="24">#map div.ol-viewport div.ol-overlaycontainer-stopevent </a>
<a class="sourceLine" id="cb2-25" data-line-number="25">div.ol-overviewmap.ol-unselectable.ol-control.ol-uncollapsible {</a>
<a class="sourceLine" id="cb2-26" data-line-number="26"> top: 200px;</a>
<a class="sourceLine" id="cb2-27" data-line-number="27"> bottom: 300px;</a>
<a class="sourceLine" id="cb2-28" data-line-number="28">}</a></code></pre></div>
</div>
</section><section id="demonstration-and-examples---online-resources" class="slide level3 module02b01a">
<h3>Demonstration and Examples - Online Resources</h3>
<ul>
<li><a href="http://karlbenedict.com/GEOG485-585/sample-files/OpenLayers/OpenLayers_01.html">Basic Mapper</a> (with Open Street Map base map (<a href="https://github.com/karlbenedict/GEOG485-585/blob/master/sample-files/OpenLayers/OpenLayers_01.html">source</a>))</li>
<li><a href="http://karlbenedict.com/GEOG485-585/sample-files/OpenLayers/OpenLayers_02_basemaps.html">Mapper</a> (<a href="https://github.com/karlbenedict/GEOG485-585/blob/master/sample-files/OpenLayers/OpenLayers_02_basemaps.html">source</a>) with a variety of base maps (Bing, Stamen, OSM) and basic layer selection</li>
<li>Basic Mapper with Controls: <a href="http://karlbenedict.com/GEOG485-585/sample-files/OpenLayers/OpenLayers_01_noControls.html">No Controls</a> (<a href="https://github.com/karlbenedict/GEOG485-585/blob/master/sample-files/OpenLayers/OpenLayers_01_noControls.html">source</a>), <a href="http://karlbenedict.com/GEOG485-585/sample-files/OpenLayers/OpenLayers_01_controlArray.html">Customized Controls</a> (<a href="https://github.com/karlbenedict/GEOG485-585/blob/master/sample-files/OpenLayers/OpenLayers_01_controlArray.html">source</a>)</li>
</ul>
</section><section id="next-week---custom-features-and-wms-layers" class="title-slide slide level2 module02b01a"><h2>Next Week - Custom Features and WMS Layers</h2></section>
<hr />
<section>
<div class="license">
<a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/4.0/88x31.png" /></a><br />This work by <span data-xmlns:cc="http://creativecommons.org/ns#" data-property="cc:attributionName">Karl Benedict</span> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a>.
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# __ __ __ . __ ___ __
# | \ / /__` | | | \ |__ /__`
# |__/ /_ .__/ |___ | |__/ |___ .__/ core :€
#
#
# The following block of code is not supposed to be edited.
# But if you want to change the behavior of these slides,
# feel free to hack it!
#
-->
<div id="progress-bar"></div>
<!-- Default Style -->
<style>
* { margin: 0; padding: 0; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; }
[role="note"] { display: none; }
body {
width: 800px; height: 600px;
margin-left: -400px; margin-top: -300px;
position: absolute; top: 50%; left: 50%;
overflow: hidden;
display: none;
}
.view body {
position: static;
margin: 0; padding: 0;
width: 100%; height: 100%;
display: inline-block;
overflow: visible; overflow-x: hidden;
/* undo Dz.onresize */
transform: none !important;
-moz-transform: none !important;
-webkit-transform: none !important;
-o-transform: none !important;
-ms-transform: none !important;
}
.view head, .view head > title { display: block }
section {
position: absolute;
pointer-events: none;
width: 100%; height: 100%;
}
.view section {
pointer-events: auto;
position: static;
width: 800px; height: 600px;
margin: -150px -200px;
float: left;
transform: scale(.4);
-moz-transform: scale(.4);
-webkit-transform: scale(.4);
-o-transform: scale(.4);
-ms-transform: scale(.4);
}
.view section > * { pointer-events: none; }
section[aria-selected] { pointer-events: auto; }
html { overflow: hidden; }
html.view { overflow: visible; }
body.loaded { display: block; }
.incremental {visibility: hidden; }
.incremental[active] {visibility: visible; }
#progress-bar{
bottom: 0;
position: absolute;
-moz-transition: width 400ms linear 0s;
-webkit-transition: width 400ms linear 0s;
-ms-transition: width 400ms linear 0s;
transition: width 400ms linear 0s;
}
.view #progress-bar {
display: none;
}
</style>
<script>
var Dz = {
remoteWindows: [],
idx: -1,
step: 0,
html: null,
slides: null,
progressBar : null,
params: {
autoplay: "1"
}
};
Dz.init = function() {
document.body.className = "loaded";
this.slides = Array.prototype.slice.call($$("body > section"));
this.progressBar = $("#progress-bar");
this.html = document.body.parentNode;
this.setupParams();
this.onhashchange();
this.setupTouchEvents();
this.onresize();
this.setupView();
}
Dz.setupParams = function() {
var p = window.location.search.substr(1).split('&');
p.forEach(function(e, i, a) {
var keyVal = e.split('=');
Dz.params[keyVal[0]] = decodeURIComponent(keyVal[1]);
});
// Specific params handling
if (!+this.params.autoplay)
$$.forEach($$("video"), function(v){ v.controls = true });
}
Dz.onkeydown = function(aEvent) {
// Don't intercept keyboard shortcuts
if (aEvent.altKey
|| aEvent.ctrlKey
|| aEvent.metaKey
|| aEvent.shiftKey) {
return;
}
if ( aEvent.keyCode == 37 // left arrow
|| aEvent.keyCode == 38 // up arrow
|| aEvent.keyCode == 33 // page up
) {
aEvent.preventDefault();
this.back();
}
if ( aEvent.keyCode == 39 // right arrow
|| aEvent.keyCode == 40 // down arrow
|| aEvent.keyCode == 34 // page down
) {
aEvent.preventDefault();
this.forward();
}
if (aEvent.keyCode == 35) { // end
aEvent.preventDefault();
this.goEnd();
}
if (aEvent.keyCode == 36) { // home
aEvent.preventDefault();
this.goStart();
}
if (aEvent.keyCode == 32) { // space
aEvent.preventDefault();
this.toggleContent();
}
if (aEvent.keyCode == 70) { // f
aEvent.preventDefault();
this.goFullscreen();
}
if (aEvent.keyCode == 79) { // o
aEvent.preventDefault();
this.toggleView();
}
}
/* Touch Events */
Dz.setupTouchEvents = function() {
var orgX, newX;
var tracking = false;
var db = document.body;
db.addEventListener("touchstart", start.bind(this), false);
db.addEventListener("touchmove", move.bind(this), false);
function start(aEvent) {
aEvent.preventDefault();
tracking = true;
orgX = aEvent.changedTouches[0].pageX;
}
function move(aEvent) {
if (!tracking) return;
newX = aEvent.changedTouches[0].pageX;
if (orgX - newX > 100) {
tracking = false;
this.forward();
} else {
if (orgX - newX < -100) {
tracking = false;
this.back();
}
}
}
}
Dz.setupView = function() {
document.body.addEventListener("click", function ( e ) {
if (!Dz.html.classList.contains("view")) return;
if (!e.target || e.target.nodeName != "SECTION") return;
Dz.html.classList.remove("view");
Dz.setCursor(Dz.slides.indexOf(e.target) + 1);
}, false);
}
/* Adapt the size of the slides to the window */
Dz.onresize = function() {
var db = document.body;
var sx = db.clientWidth / window.innerWidth;
var sy = db.clientHeight / window.innerHeight;
var transform = "scale(" + (1/Math.max(sx, sy)) + ")";
db.style.MozTransform = transform;
db.style.WebkitTransform = transform;
db.style.OTransform = transform;
db.style.msTransform = transform;
db.style.transform = transform;
}
Dz.getNotes = function(aIdx) {
var s = $("section:nth-of-type(" + aIdx + ")");
var d = s.$("[role='note']");
return d ? d.innerHTML : "";
}
Dz.onmessage = function(aEvent) {
var argv = aEvent.data.split(" "), argc = argv.length;
argv.forEach(function(e, i, a) { a[i] = decodeURIComponent(e) });
var win = aEvent.source;
if (argv[0] === "REGISTER" && argc === 1) {
this.remoteWindows.push(win);
this.postMsg(win, "REGISTERED", document.title, this.slides.length);
this.postMsg(win, "CURSOR", this.idx + "." + this.step);
return;
}
if (argv[0] === "BACK" && argc === 1)
this.back();
if (argv[0] === "FORWARD" && argc === 1)
this.forward();
if (argv[0] === "START" && argc === 1)
this.goStart();
if (argv[0] === "END" && argc === 1)
this.goEnd();
if (argv[0] === "TOGGLE_CONTENT" && argc === 1)
this.toggleContent();
if (argv[0] === "SET_CURSOR" && argc === 2)
window.location.hash = "#" + argv[1];
if (argv[0] === "GET_CURSOR" && argc === 1)
this.postMsg(win, "CURSOR", this.idx + "." + this.step);
if (argv[0] === "GET_NOTES" && argc === 1)
this.postMsg(win, "NOTES", this.getNotes(this.idx));
}
Dz.toggleContent = function() {
// If a Video is present in this new slide, play it.
// If a Video is present in the previous slide, stop it.
var s = $("section[aria-selected]");
if (s) {
var video = s.$("video");
if (video) {
if (video.ended || video.paused) {
video.play();
} else {
video.pause();
}
}
}
}
Dz.setCursor = function(aIdx, aStep) {
// If the user change the slide number in the URL bar, jump
// to this slide.
aStep = (aStep != 0 && typeof aStep !== "undefined") ? "." + aStep : ".0";
window.location.hash = "#" + aIdx + aStep;
}
Dz.onhashchange = function() {
var cursor = window.location.hash.split("#"),
newidx = 1,
newstep = 0;
if (cursor.length == 2) {
newidx = ~~cursor[1].split(".")[0];
newstep = ~~cursor[1].split(".")[1];
if (newstep > Dz.slides[newidx - 1].$$('.incremental > *').length) {
newstep = 0;
newidx++;
}
}
this.setProgress(newidx, newstep);
if (newidx != this.idx) {
this.setSlide(newidx);
}
if (newstep != this.step) {
this.setIncremental(newstep);
}
for (var i = 0; i < this.remoteWindows.length; i++) {
this.postMsg(this.remoteWindows[i], "CURSOR", this.idx + "." + this.step);
}
}
Dz.back = function() {
if (this.idx == 1 && this.step == 0) {
return;
}
if (this.step == 0) {
this.setCursor(this.idx - 1,
this.slides[this.idx - 2].$$('.incremental > *').length);
} else {
this.setCursor(this.idx, this.step - 1);
}
}
Dz.forward = function() {
if (this.idx >= this.slides.length &&
this.step >= this.slides[this.idx - 1].$$('.incremental > *').length) {
return;
}
if (this.step >= this.slides[this.idx - 1].$$('.incremental > *').length) {
this.setCursor(this.idx + 1, 0);
} else {
this.setCursor(this.idx, this.step + 1);
}
}
Dz.goStart = function() {
this.setCursor(1, 0);
}
Dz.goEnd = function() {
var lastIdx = this.slides.length;
var lastStep = this.slides[lastIdx - 1].$$('.incremental > *').length;
this.setCursor(lastIdx, lastStep);
}
Dz.toggleView = function() {
this.html.classList.toggle("view");
if (this.html.classList.contains("view")) {
$("section[aria-selected]").scrollIntoView(true);
}
}
Dz.setSlide = function(aIdx) {
this.idx = aIdx;
var old = $("section[aria-selected]");
var next = $("section:nth-of-type("+ this.idx +")");
if (old) {
old.removeAttribute("aria-selected");
var video = old.$("video");
if (video) {
video.pause();
}
}
if (next) {
next.setAttribute("aria-selected", "true");
if (this.html.classList.contains("view")) {
next.scrollIntoView();
}
var video = next.$("video");
if (video && !!+this.params.autoplay) {
video.play();
}
} else {
// That should not happen
this.idx = -1;
// console.warn("Slide doesn't exist.");
}
}
Dz.setIncremental = function(aStep) {
this.step = aStep;
var old = this.slides[this.idx - 1].$('.incremental > *[aria-selected]');
if (old) {
old.removeAttribute('aria-selected');
}
var incrementals = $$('.incremental');
if (this.step <= 0) {
$$.forEach(incrementals, function(aNode) {
aNode.removeAttribute('active');
});
return;
}
var next = this.slides[this.idx - 1].$$('.incremental > *')[this.step - 1];
if (next) {
next.setAttribute('aria-selected', true);
next.parentNode.setAttribute('active', true);
var found = false;
$$.forEach(incrementals, function(aNode) {
if (aNode != next.parentNode)
if (found)
aNode.removeAttribute('active');
else
aNode.setAttribute('active', true);
else
found = true;
});
} else {
setCursor(this.idx, 0);
}
return next;
}
Dz.goFullscreen = function() {
var html = $('html'),
requestFullscreen = html.requestFullscreen || html.requestFullScreen || html.mozRequestFullScreen || html.webkitRequestFullScreen;
if (requestFullscreen) {
requestFullscreen.apply(html);
}
}
Dz.setProgress = function(aIdx, aStep) {
var slide = $("section:nth-of-type("+ aIdx +")");
if (!slide)
return;
var steps = slide.$$('.incremental > *').length + 1,
slideSize = 100 / (this.slides.length - 1),
stepSize = slideSize / steps;
this.progressBar.style.width = ((aIdx - 1) * slideSize + aStep * stepSize) + '%';
}
Dz.postMsg = function(aWin, aMsg) { // [arg0, [arg1...]]
aMsg = [aMsg];
for (var i = 2; i < arguments.length; i++)
aMsg.push(encodeURIComponent(arguments[i]));
aWin.postMessage(aMsg.join(" "), "*");
}
function init() {
Dz.init();
window.onkeydown = Dz.onkeydown.bind(Dz);
window.onresize = Dz.onresize.bind(Dz);
window.onhashchange = Dz.onhashchange.bind(Dz);
window.onmessage = Dz.onmessage.bind(Dz);
}
window.onload = init;
</script>
<script> // Helpers
if (!Function.prototype.bind) {
Function.prototype.bind = function (oThis) {
// closest thing possible to the ECMAScript 5 internal IsCallable
// function
if (typeof this !== "function")
throw new TypeError(
"Function.prototype.bind - what is trying to be fBound is not callable"
);
var aArgs = Array.prototype.slice.call(arguments, 1),
fToBind = this,
fNOP = function () {},
fBound = function () {
return fToBind.apply( this instanceof fNOP ? this : oThis || window,
aArgs.concat(Array.prototype.slice.call(arguments)));
};
fNOP.prototype = this.prototype;
fBound.prototype = new fNOP();
return fBound;
};
}
var $ = (HTMLElement.prototype.$ = function(aQuery) {
return this.querySelector(aQuery);
}).bind(document);
var $$ = (HTMLElement.prototype.$$ = function(aQuery) {
return this.querySelectorAll(aQuery);
}).bind(document);
$$.forEach = function(nodeList, fun) {
Array.prototype.forEach.call(nodeList, fun);
}
</script>
<!-- vim: set fdm=marker: }}} -->
</body>
</html>