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Shows keyboard shorcuts overlay on pressing question mark

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nava teja 2014-06-08 00:59:29 +05:30
parent 131c00689a
commit 75a53da9e5
2 changed files with 98 additions and 0 deletions
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33
css/reveal.css
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@ -1729,6 +1729,39 @@ body {
}
.reveal .preview-link-overlay .viewport .shortcuts {
-webkit-column-count: 2;
-moz-column-count: 2;
column-count: 2;
font-size: 20px;
height: 100%;
margin-left: 35%;
margin-top: 20px;
text-align: center;
}
.reveal .preview-link-overlay .viewport .shortcuts table {
border: 1px solid #fff;
border-collapse: collapse;
font-size: 14px;
}
.reveal .preview-link-overlay .viewport .shortcuts table th{
border: 1px solid #fff;
height: 30px;
width: 200px;
padding: 10px;
vertical-align: middle;
}
.reveal .preview-link-overlay .viewport .shortcuts table tr td{
border: 1px solid #fff;
height: 30px;
vertical-align: middle;
padding: 5px;
}
/*********************************************
* PLAYBACK COMPONENT

65
js/reveal.js
View file

@ -177,6 +177,20 @@ var Reveal = (function(){
startCount: 0,
captured: false,
threshold: 40
},
// Holds information about the keyboard shortcuts
keyboard_shortcuts = {
'p': "Previous slide",
'n': "Next slide",
'h': "Navigate left",
'l': "Navigate right",
'k': "Navigate up",
'j': "Navigate down",
'Home': "First slide",
'End': "Last slide",
'b': "Pause",
'f': "Fullscreen"
};
/**
@ -646,6 +660,7 @@ var Reveal = (function(){
if( config.keyboard ) {
document.addEventListener( 'keydown', onDocumentKeyDown, false );
document.addEventListener( 'keypress', onDocumentKeyPress, false );
}
if( config.progress && dom.progress ) {
@ -689,6 +704,7 @@ var Reveal = (function(){
eventsAreBound = false;
document.removeEventListener( 'keydown', onDocumentKeyDown, false );
document.removeEventListener( 'keypress', onDocumentKeyPress, false );
window.removeEventListener( 'hashchange', onWindowHashChange, false );
window.removeEventListener( 'resize', onWindowResize, false );
@ -1019,6 +1035,44 @@ var Reveal = (function(){
}
/**
* Opens a overlay window for the keyboard shortcuts.
*/
function openShortcutsOverlay() {
closePreview();
dom.preview = document.createElement( 'div' );
dom.preview.classList.add( 'preview-link-overlay' );
dom.wrapper.appendChild( dom.preview );
var html = '<h5>Keyboard Shortcuts</h5><br/>';
html += '<table> <th>KEY</th> <th>ACTION</th>';
for( var key in keyboard_shortcuts ) {
html += '<tr> <td>' + key + '</td> <td>' + keyboard_shortcuts[key] + '</td> </tr>'
}
html += '</table>';
dom.preview.innerHTML = [
'<header>',
'<a class="close" href="#"><span class="icon"></span></a>',
'</header>',
'<div class="viewport">',
'<div class="shortcuts">'+html+'</div>',
'</div>'
].join('');
dom.preview.querySelector( '.close' ).addEventListener( 'click', function( event ) {
closePreview();
event.preventDefault();
}, false );
setTimeout( function() {
dom.preview.classList.add( 'visible' );
}, 1 );
}
/**
* Applies JavaScript-controlled layout rules to the
* presentation.
@ -2642,6 +2696,17 @@ var Reveal = (function(){
}
/**
* Handler for the document level 'keypress' event.
*/
function onDocumentKeyPress( event ) {
// Check if the pressed key is question mark
if( event.shiftKey && event.charCode == 63 ) {
openShortcutsOverlay();
}
}
/**
* Handler for the document level 'keydown' event.
*/